Pratik Roy | University of Windsor (original) (raw)

Papers by Pratik Roy

IEEE Transactions on Magnetics, 2020

The conventional mechanical design approach of cooling jackets serves the goal of heat dissipatio... more The conventional mechanical design approach of cooling jackets serves the goal of heat dissipation to keep motor temperature below the maximum allowable limit for thermal protection. However, the desired motor performance cannot be effectively achieved by this approach since it only employs heat transfer mechanism. Therefore, a detailed algorithm is developed to provide a constructive cooling design process to achieve the desired performance of a permanent magnet traction motor. In the pre–processing stage, a two–way electromagnetic (EM) and thermal co–analysis method is developed for pre–investigation of motor temperature and torque to set the goal for the cooling requirement. In the solver, a shape and size optimization method is utilized to get the optimal cooling design for fulfilling the requirement. Further, a multiphysics finite element analysis model is developed for structural optimization to ensure safe minimal weight of cooling design for the improvement in torque and power density. In the validation step, unlike using only computational fluid dynamics (CFD) to predict motor temperature, a two–way coupling of EM and CFD model is utilized to ensure the design goals of both torque and temperature for several operating conditions. Finally, the design optimization of a cooling jacket for an interior permanent magnet synchronous motor is conducted by implementing this algorithm.

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International Conference on Mechanical Engineeringand Renewable Energy 2015 (ICMERE2015), 2015

Nowadays energy storage is increasingly becoming a hot topic in the debate on how to improve effi... more Nowadays energy storage is increasingly becoming a hot topic in the debate on how to improve efficiency, reliability and price-competitiveness of electricity services as well as on how to achieve deeper integration of intermittent renewable energies. Battery can play an important role in achieving the target of universal access to clean, reliable and affordable electricity services. Battery is an energy storage device consisting of two or more electrochemical cells that convert stored chemical energy into electrical energy and used as a source of power. As an energy storage device, the use of the battery is increasing day by day such as in automobiles, charger light & fan, IPS, UPS etc. But most of the users are not aware of proper maintenance of batteries. Batteries cannot serve as per capacity and sometimes permanently damage before completing economic lifetime due to the lack of proper maintenance. But if batteries are properly designed and maintained, batteries will improve the system’s performance and lead to economic savings over its lifetime. The purpose of this paper is to outline the duties and responsibilities for routine operation and care of batteries so that batteries will serve properly more than its economic lifetime.

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International Journal of Research, 2016

In modern technology is largely depends on automation and control system. Automation and control ... more In modern technology is largely depends on automation and control system. Automation and control system refers the use of various control systems for operating equipment such as machinery, processes in factories, boilers and heat treating ovens, switching on telephone networks, steering and stabilization of ships, aircraft, automobile and other applications with minimal or reduced human intervention. The greatest advantage of automation and control system is that it saves labor. A water level indicator system is a device that indicates the level of water in a tank or reservoir. It is widely used in industrial applications such as boilers in nuclear power plants and residential applications. The project is to design water level indicator with automatic water pump controlling system. water level sensor has been made for apprehended water level properly. Micro-controller is plighted to restrain the overall system accurately that reduces the control complexity. It takes input through the sensor unit that senses the water level. After taking input , output intends the pump's action (on/off) with respect to current water status of the tank. A display unit indicates the status of pump and water level. The device also monitor the state of level of water whether it is stable, increasing or decreasing with what velocity. It also stores the total time of pump being kept ON. It also keep monitoring whether the pumping is working well or not. While Keeping the motor ON it detects whether the motor pump is working well or not every minutes. If the level is increasing or decreasing in each minutes then the indicator shows the motor pump is working well else after three minutes if the level remains stable then it shows there is a problem in motor. Thus it also monitor the working performance of the pump.

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2019 IEEE Canadian Conference of Electrical and Computer Engineering (CCECE), 2019

This paper presents a study of cooling technologies implemented on traction motors for Electrical... more This paper presents a study of cooling technologies implemented on traction motors for Electrical Vehicles (EVs). Cooling options presented in this paper are forced liquid cooling, oil cooling application, and gas cooling as well as the advantages and disadvantages with each option. Maximization effectiveness of cooling for a given motor variation will assist engineers during their design of an EV. This study includes an analysis of the current cooling options that is being used for traction application, as well as, the cooling options currently being researched as next-generation cooling methodologies. Finally, this paper aims to assist in presenting the research and development of current industrial trends in cooling implementation, while allowing future engineers into an insight of this field of research.

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WCX SAE World Congress Experience, 2020

Due to high torque and power density, permanent magnet synchronous motor (PMSM) has become the mo... more Due to high torque and power density, permanent magnet synchronous motor (PMSM) has become the most viable candidate for electric vehicle (EV) traction application. However, to obtain such high torque and power density within a compact motor structure can cause a significant temperature rise within the motor while operating. As a result of high temperature rise, permanent magnet demagnetization may even occur within the motor. Thus, PMSM is susceptible to thermal instability. Therefore, to ensure thermal stability during varying operating conditions, thermal analysis is a mandatory procedure in addition to electromagnetic analysis during the design phase of the motor. In this paper, a computationally efficient numerical finite element analysis (FEA) process has been proposed for thermal analysis of PMSM. The proposed method is a hybrid technique in which analytical lumped parameter thermal network (LPTN) strategies are utilized to a certain extent to characterize the unaddressed heat flow from shaft to housing through bearing and endcap in 2D FEA. Further, a unique air gap creation strategy has been implemented to address the air gap convection heat transfer more accurately in FEA. The main goal of the proposed method is to make the thermal analysis process computationally more efficient for motor temperature prediction by keeping the proper balance between simplification and accuracy of the process. Later, the proposed method has been used to analyze the thermal performance of a newly designed interior PMSM prototype for EV application. Finally, the temperature results from the proposed method have been compared with conventional FEA, LPTN and CFD to demonstrate the improvements.

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IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019

Convection coefficient in the end-winding is a critical thermal parameter in Lumped Parameter The... more Convection coefficient in the end-winding is a critical thermal parameter in Lumped Parameter Thermal Network (LPTN) model solution for an accurate motor winding temperature prediction. However, it is a challenging task to determine this convection coefficient due to complex heat and air circulation characteristics in the end-winding region. Until now, all researches focus on Totally Enclosed Fan-cooled (TEFC) Aluminum Rotor Induction Motor (ARIM) with a rotor having fins on its end-rings. But Copper Rotor Induction Motor (CRIM) has a rotor that does not have any fins on its end-rings. Hence, this research will determine convection coefficient in the end-region of Copper Rotor Induction Motor (CRIM) that has smooth rotor end. A Computational Fluid Dynamic (CFD) technique along-with a Lumped Parameter Thermal Network (LPTN) model is proposed to determine this convection coefficient. Thermal experiments on a 20-hp Copper Rotor Induction Motor (CRIM) are conducted to validate this proposed approach.

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IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019

Due to high torque and power density, permanent magnet synchronous motor usually faces significan... more Due to high torque and power density, permanent magnet synchronous motor usually faces significant challenges for thermal stability. Moreover, it becomes difficult to keep thermal stability within the motor because the magnets that are embedded in the rotor or mounted on the rotor surface are susceptible to heat. Therefore, thermal investigation is one of the mandatory procedures during design phase of the permanent magnet synchronous motor to ensure thermal stability. In this paper, a universal lumped parameter thermal network model has been proposed for thermal design of all types of permanent magnet synchronous motors which can be used for wide range of winding configurations and any position of magnets in the rotor. The proposed analytical thermal model has been used to check the thermal performance of both newly designed interior and surface mounted permanent magnet synchronous motor prototypes for future electric vehicle application. Further, a numerical thermal model has been proposed also to check temperature distribution throughout all parts of both motors and for comparison.

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2019 IEEE 28th International Symposium on Industrial Electronics (ISIE), 2019

Traction motors used in electric vehicles have some definite operational requirements including h... more Traction motors used in electric vehicles have some definite operational requirements including high torque at low speed and constant high power at high speeds. These high torque and power requirements contribute directly to higher heat generation in the motors. Thus, an effective thermal design is needed during motor design for improved thermal performance. This review paper mainly focuses on different types of effective methods of thermal design analyzing the thermal performance of traction motors. In broad view, this review paper presents a brief discussion on comparison of different methods of thermal design and analysis for different types of traction motors. The final goal of the comparison is to show how improved thermal design can be achieved through optimum electromagnetic and structural design characteristics for different traction motor geometries.

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International Conference on Mechanical, Industrial and Energy Engineering (ICMIEE2015), Dec 26, 2016

Nowadays road accident is a daily occurrence in our daily life. Most of the road accidents are ha... more Nowadays road accident is a daily occurrence in our daily life. Most of the road accidents are happened due to the rash driving or reckless driving. Too many people are losing their lives because of others mistakes. At present, traffic polices have to use a handheld radar gun to detect rash driving and aim at the vehicles to record its speed. If the vehicle exceeds the speed limit, nearest police station is informed to stop the speeding vehicle. This is an ineffective process because after detecting one has to inform the same and a lot of time is wasted. So, the aim of this project is to develop an effective device to detect rash driving on highways and to alert the traffic authorities in case of any speed violation. The proposed system will check on rash driving by calculating the speed of a vehicle using the time taken to travel between the two set points at a fixed distance. The speed limit is set by the police who use the system depending upon the traffic at the specific location. If the vehicle crosses the speed limit, a buzzer sounds alerting the police. This concept can be extended in future by integrating a camera with the system which could capture the image of the number plate of the vehicle to send that to the traffic authorities.

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International Conference of Mechanical Engineering 2015 (ICME), Dec 19, 2015

From the beginning, fossil fuel (Gas, Coal, Oil etc.) is being mainly used to generate electricit... more From the beginning, fossil fuel (Gas, Coal, Oil etc.) is being mainly used to generate electricity. But it is not far off days that fossil fuel would be a story or museum article. So, in futurepower crisis will be a common problem all over the world. Bangladesh is not out of it. To solve this problem government is trying to find alternative way and other different policies. These policies meet up power crisis temporarily, but not permanently. So our government is looking up to the alternative source like renewable energy. Renewable energies are solar, wind, tidal, geothermal etc. Among these tidal wave is more predictable. The tide closely follows the moon during its rotation around the earth, creating diurnal tide and ebb cycles.During high tide, water can be trapped in the coastal basin and this water head can be used to drive a turbine and produce large amount of power which is very reliable and continuous.Bangladesh has good potential for harnessing wave power from the Bay of Bengal.In our research tidal power would be economical and very low compared to most other power plants for Bangladesh. So our main objective is to introduce tidal power as an alternative source to meet up power crisis of Bangladesh.

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Edupedia Publications Pvt. Ltd., Sep 25, 2016

Modern technology is largely depends on automation and control system. Automation and control sys... more Modern technology is largely depends on automation and control system. Automation and control system refers the use of various control systems for operating equipment such as machinery, processes in factories, boilers and heat treating ovens, switching on telephone networks, steering and stabilization of ships, aircraft, automobile and other applications with minimal or reduced human intervention. The greatest advantage of automation and control system is that it saves labor. However, it is also used to save energy and materials and to improve quality, accuracy and precision. Because of these advantages, nowadays automation and control system is using in every sector. Automobile sector is not out of it. The aim of this project is to design and to develop such type of automatic control system for an engine which will aid in protecting the engine from overheating by means of alarm and signal through a temperature sensor. This signal and alarming system mainly consists of temperature sensor circuit, micro-controller and LCD. The temperature sensor is fixed to the engine, and operating temperature is measured by this. This produces the alarm and signal when the engine temperature exceeds the set temperature limit. LCD continuously shows the operating temperature of engine.

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Teaching Documents by Pratik Roy

A vortex diode is a disc-shaped chamber which has two parts – one is a tangential port and anothe... more A vortex diode is a disc-shaped chamber which has two parts – one is a tangential port and another one is an axial port. Vortex diode is mainly used as leaky non-return valves in applications where it is desirable to avoid valves with moving parts. So, due to the absence of moving parts, it is maintenance free and suitable for radioactive liquid transfer application. For these specific reasons, it is widely used in nuclear industry as fluidic device. Also, it has vast applications in medical science also. The flow pattern in vortex diode is really interesting. The flow entering through the tangential port sets up a vortex. On the other hand, when fluid enters through the axial port creates a substantial radial flow. The first one is called reverse flow and the second one is called forward flow. Our main goal is to evaluate pressure drop characteristics for both flow patterns in different Reynold’s number in between 200 to 3000.

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Power System Analysis of The IEEE 14-Bus Test System Using PSAT and MATLAB

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Drafts by Pratik Roy

—Voltage interruption can be happened by several reasons like blackout, brownout, noise, spike et... more —Voltage interruption can be happened by several reasons like blackout, brownout, noise, spike etc. Those incidents have consequential effect on computer's hardware such as data losses, burning of sensitive equipment etc. So, UPS broadly called an uninterruptible power supply device is used in computer to provide a backup power source which will maintain the consistency in voltage and flow of electricity which in turn will provide consistent power input. Batteries are used as energy storage device in UPS which store electric energy during charging state and discharge that electric energy during any kind of interruption to provide backup as additional power source for the computer. So, the most important integral part of UPS is the battery pack which is used as energy storage device in UPS. Main goal of this paper is to design the suitable battery pack for UPS so that it can give maximum backup range to the computer within a certain economical range or cost limit. Also, another goal is to analyze the electrical and thermal parameters of the designed battery pack and cell and suggest better solutions to make the wet battery cell maintenance free (no need of addition of water). Index Terms—uninterruptable power supply, energy storage device, lead acid battery, battery maintenance, wet cell battery.

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Thesis Chapters by Pratik Roy

University of Windsor, 2020

Permanent magnet synchronous motor (PMSM) is a better choice as a traction motor since it has hig... more Permanent magnet synchronous motor (PMSM) is a better choice as a traction motor since it has high power density and high torque capability within compact structure. However, accommodating such high power within compact space is a great challenge, as it is responsible for significant rise of heat in PMSM. As a result, there is considerable increase in operating temperature which in turn negatively affects the electromagnetic performance of the motor. Further, if the temperature rise exceeds the permissible limit, it can cause demagnetization of magnets, damage of insulation, bearing faults, etc. which in turn affect the overall lifecycle of the motor. Therefore, thermal issues need to be dealt with carefully during the design phase of PMSM. Hence, the main focus of this thesis is to develop efficient ways for thermal modeling to address thermal issues properly. Firstly, a universal lumped parameter thermal network (LPTN) is proposed which can be used for all types of PMSMs regardless of any winding configuration and any position of magnets in the rotor. Further, a computationally efficient finite element analysis (FEA) thermal model is proposed with a novel hybrid technique utilizing LPTN strategy for addressing the air gap convection in an efficient way. Both proposed LPTN and FEA thermal models are simplified ways to predict motor temperature with a comparatively less calculation process. Finally, the proposed thermal models have been experimentally validated for the newly designed interior and surface mounted PMSM prototypes. Again, a procedure for effective cooling design process of PMSM has been suggested by developing an algorithm for cooling design optimization of the motor. Further, a computational fluid dynamics (CFD) model with a proposed two-way electro-thermal co-analysis strategy has been developed to predict both thermal and electromagnetic performance of PMSM more accurately considering the active cooling system. The developed step algorithm and CFD modeling approach will pave the way for future work on cooling design optimization of the newly designed interior and surface mounted PMSM prototypes.

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Conference Presentations by Pratik Roy

EECOMOBOLITY (ORF) & HEVPD&D CREATE Conference, 2019

High torque and high power generation in traction motors cause higher heat generation which in tu... more High torque and high power generation in traction motors cause higher heat generation which in turn can cause:- damage of insulation, bearing faults, demagnetization of magnets in PM traction motors. So, thermal stability is one of the most important issues for traction motors. Proper thermal design and analysis not only ensure thermal stability for traction motors, but also suggest proper and effective thermal management which in turn ensure good thermal performance of traction motors. The main focus of this poster paper is to describe different ways of thermal design and analysis of traction motor.

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IEEE Transactions on Magnetics, 2020

The conventional mechanical design approach of cooling jackets serves the goal of heat dissipatio... more The conventional mechanical design approach of cooling jackets serves the goal of heat dissipation to keep motor temperature below the maximum allowable limit for thermal protection. However, the desired motor performance cannot be effectively achieved by this approach since it only employs heat transfer mechanism. Therefore, a detailed algorithm is developed to provide a constructive cooling design process to achieve the desired performance of a permanent magnet traction motor. In the pre–processing stage, a two–way electromagnetic (EM) and thermal co–analysis method is developed for pre–investigation of motor temperature and torque to set the goal for the cooling requirement. In the solver, a shape and size optimization method is utilized to get the optimal cooling design for fulfilling the requirement. Further, a multiphysics finite element analysis model is developed for structural optimization to ensure safe minimal weight of cooling design for the improvement in torque and power density. In the validation step, unlike using only computational fluid dynamics (CFD) to predict motor temperature, a two–way coupling of EM and CFD model is utilized to ensure the design goals of both torque and temperature for several operating conditions. Finally, the design optimization of a cooling jacket for an interior permanent magnet synchronous motor is conducted by implementing this algorithm.

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International Conference on Mechanical Engineeringand Renewable Energy 2015 (ICMERE2015), 2015

Nowadays energy storage is increasingly becoming a hot topic in the debate on how to improve effi... more Nowadays energy storage is increasingly becoming a hot topic in the debate on how to improve efficiency, reliability and price-competitiveness of electricity services as well as on how to achieve deeper integration of intermittent renewable energies. Battery can play an important role in achieving the target of universal access to clean, reliable and affordable electricity services. Battery is an energy storage device consisting of two or more electrochemical cells that convert stored chemical energy into electrical energy and used as a source of power. As an energy storage device, the use of the battery is increasing day by day such as in automobiles, charger light & fan, IPS, UPS etc. But most of the users are not aware of proper maintenance of batteries. Batteries cannot serve as per capacity and sometimes permanently damage before completing economic lifetime due to the lack of proper maintenance. But if batteries are properly designed and maintained, batteries will improve the system’s performance and lead to economic savings over its lifetime. The purpose of this paper is to outline the duties and responsibilities for routine operation and care of batteries so that batteries will serve properly more than its economic lifetime.

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International Journal of Research, 2016

In modern technology is largely depends on automation and control system. Automation and control ... more In modern technology is largely depends on automation and control system. Automation and control system refers the use of various control systems for operating equipment such as machinery, processes in factories, boilers and heat treating ovens, switching on telephone networks, steering and stabilization of ships, aircraft, automobile and other applications with minimal or reduced human intervention. The greatest advantage of automation and control system is that it saves labor. A water level indicator system is a device that indicates the level of water in a tank or reservoir. It is widely used in industrial applications such as boilers in nuclear power plants and residential applications. The project is to design water level indicator with automatic water pump controlling system. water level sensor has been made for apprehended water level properly. Micro-controller is plighted to restrain the overall system accurately that reduces the control complexity. It takes input through the sensor unit that senses the water level. After taking input , output intends the pump's action (on/off) with respect to current water status of the tank. A display unit indicates the status of pump and water level. The device also monitor the state of level of water whether it is stable, increasing or decreasing with what velocity. It also stores the total time of pump being kept ON. It also keep monitoring whether the pumping is working well or not. While Keeping the motor ON it detects whether the motor pump is working well or not every minutes. If the level is increasing or decreasing in each minutes then the indicator shows the motor pump is working well else after three minutes if the level remains stable then it shows there is a problem in motor. Thus it also monitor the working performance of the pump.

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2019 IEEE Canadian Conference of Electrical and Computer Engineering (CCECE), 2019

This paper presents a study of cooling technologies implemented on traction motors for Electrical... more This paper presents a study of cooling technologies implemented on traction motors for Electrical Vehicles (EVs). Cooling options presented in this paper are forced liquid cooling, oil cooling application, and gas cooling as well as the advantages and disadvantages with each option. Maximization effectiveness of cooling for a given motor variation will assist engineers during their design of an EV. This study includes an analysis of the current cooling options that is being used for traction application, as well as, the cooling options currently being researched as next-generation cooling methodologies. Finally, this paper aims to assist in presenting the research and development of current industrial trends in cooling implementation, while allowing future engineers into an insight of this field of research.

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WCX SAE World Congress Experience, 2020

Due to high torque and power density, permanent magnet synchronous motor (PMSM) has become the mo... more Due to high torque and power density, permanent magnet synchronous motor (PMSM) has become the most viable candidate for electric vehicle (EV) traction application. However, to obtain such high torque and power density within a compact motor structure can cause a significant temperature rise within the motor while operating. As a result of high temperature rise, permanent magnet demagnetization may even occur within the motor. Thus, PMSM is susceptible to thermal instability. Therefore, to ensure thermal stability during varying operating conditions, thermal analysis is a mandatory procedure in addition to electromagnetic analysis during the design phase of the motor. In this paper, a computationally efficient numerical finite element analysis (FEA) process has been proposed for thermal analysis of PMSM. The proposed method is a hybrid technique in which analytical lumped parameter thermal network (LPTN) strategies are utilized to a certain extent to characterize the unaddressed heat flow from shaft to housing through bearing and endcap in 2D FEA. Further, a unique air gap creation strategy has been implemented to address the air gap convection heat transfer more accurately in FEA. The main goal of the proposed method is to make the thermal analysis process computationally more efficient for motor temperature prediction by keeping the proper balance between simplification and accuracy of the process. Later, the proposed method has been used to analyze the thermal performance of a newly designed interior PMSM prototype for EV application. Finally, the temperature results from the proposed method have been compared with conventional FEA, LPTN and CFD to demonstrate the improvements.

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IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019

Convection coefficient in the end-winding is a critical thermal parameter in Lumped Parameter The... more Convection coefficient in the end-winding is a critical thermal parameter in Lumped Parameter Thermal Network (LPTN) model solution for an accurate motor winding temperature prediction. However, it is a challenging task to determine this convection coefficient due to complex heat and air circulation characteristics in the end-winding region. Until now, all researches focus on Totally Enclosed Fan-cooled (TEFC) Aluminum Rotor Induction Motor (ARIM) with a rotor having fins on its end-rings. But Copper Rotor Induction Motor (CRIM) has a rotor that does not have any fins on its end-rings. Hence, this research will determine convection coefficient in the end-region of Copper Rotor Induction Motor (CRIM) that has smooth rotor end. A Computational Fluid Dynamic (CFD) technique along-with a Lumped Parameter Thermal Network (LPTN) model is proposed to determine this convection coefficient. Thermal experiments on a 20-hp Copper Rotor Induction Motor (CRIM) are conducted to validate this proposed approach.

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IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society, 2019

Due to high torque and power density, permanent magnet synchronous motor usually faces significan... more Due to high torque and power density, permanent magnet synchronous motor usually faces significant challenges for thermal stability. Moreover, it becomes difficult to keep thermal stability within the motor because the magnets that are embedded in the rotor or mounted on the rotor surface are susceptible to heat. Therefore, thermal investigation is one of the mandatory procedures during design phase of the permanent magnet synchronous motor to ensure thermal stability. In this paper, a universal lumped parameter thermal network model has been proposed for thermal design of all types of permanent magnet synchronous motors which can be used for wide range of winding configurations and any position of magnets in the rotor. The proposed analytical thermal model has been used to check the thermal performance of both newly designed interior and surface mounted permanent magnet synchronous motor prototypes for future electric vehicle application. Further, a numerical thermal model has been proposed also to check temperature distribution throughout all parts of both motors and for comparison.

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2019 IEEE 28th International Symposium on Industrial Electronics (ISIE), 2019

Traction motors used in electric vehicles have some definite operational requirements including h... more Traction motors used in electric vehicles have some definite operational requirements including high torque at low speed and constant high power at high speeds. These high torque and power requirements contribute directly to higher heat generation in the motors. Thus, an effective thermal design is needed during motor design for improved thermal performance. This review paper mainly focuses on different types of effective methods of thermal design analyzing the thermal performance of traction motors. In broad view, this review paper presents a brief discussion on comparison of different methods of thermal design and analysis for different types of traction motors. The final goal of the comparison is to show how improved thermal design can be achieved through optimum electromagnetic and structural design characteristics for different traction motor geometries.

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International Conference on Mechanical, Industrial and Energy Engineering (ICMIEE2015), Dec 26, 2016

Nowadays road accident is a daily occurrence in our daily life. Most of the road accidents are ha... more Nowadays road accident is a daily occurrence in our daily life. Most of the road accidents are happened due to the rash driving or reckless driving. Too many people are losing their lives because of others mistakes. At present, traffic polices have to use a handheld radar gun to detect rash driving and aim at the vehicles to record its speed. If the vehicle exceeds the speed limit, nearest police station is informed to stop the speeding vehicle. This is an ineffective process because after detecting one has to inform the same and a lot of time is wasted. So, the aim of this project is to develop an effective device to detect rash driving on highways and to alert the traffic authorities in case of any speed violation. The proposed system will check on rash driving by calculating the speed of a vehicle using the time taken to travel between the two set points at a fixed distance. The speed limit is set by the police who use the system depending upon the traffic at the specific location. If the vehicle crosses the speed limit, a buzzer sounds alerting the police. This concept can be extended in future by integrating a camera with the system which could capture the image of the number plate of the vehicle to send that to the traffic authorities.

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International Conference of Mechanical Engineering 2015 (ICME), Dec 19, 2015

From the beginning, fossil fuel (Gas, Coal, Oil etc.) is being mainly used to generate electricit... more From the beginning, fossil fuel (Gas, Coal, Oil etc.) is being mainly used to generate electricity. But it is not far off days that fossil fuel would be a story or museum article. So, in futurepower crisis will be a common problem all over the world. Bangladesh is not out of it. To solve this problem government is trying to find alternative way and other different policies. These policies meet up power crisis temporarily, but not permanently. So our government is looking up to the alternative source like renewable energy. Renewable energies are solar, wind, tidal, geothermal etc. Among these tidal wave is more predictable. The tide closely follows the moon during its rotation around the earth, creating diurnal tide and ebb cycles.During high tide, water can be trapped in the coastal basin and this water head can be used to drive a turbine and produce large amount of power which is very reliable and continuous.Bangladesh has good potential for harnessing wave power from the Bay of Bengal.In our research tidal power would be economical and very low compared to most other power plants for Bangladesh. So our main objective is to introduce tidal power as an alternative source to meet up power crisis of Bangladesh.

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Edupedia Publications Pvt. Ltd., Sep 25, 2016

Modern technology is largely depends on automation and control system. Automation and control sys... more Modern technology is largely depends on automation and control system. Automation and control system refers the use of various control systems for operating equipment such as machinery, processes in factories, boilers and heat treating ovens, switching on telephone networks, steering and stabilization of ships, aircraft, automobile and other applications with minimal or reduced human intervention. The greatest advantage of automation and control system is that it saves labor. However, it is also used to save energy and materials and to improve quality, accuracy and precision. Because of these advantages, nowadays automation and control system is using in every sector. Automobile sector is not out of it. The aim of this project is to design and to develop such type of automatic control system for an engine which will aid in protecting the engine from overheating by means of alarm and signal through a temperature sensor. This signal and alarming system mainly consists of temperature sensor circuit, micro-controller and LCD. The temperature sensor is fixed to the engine, and operating temperature is measured by this. This produces the alarm and signal when the engine temperature exceeds the set temperature limit. LCD continuously shows the operating temperature of engine.

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A vortex diode is a disc-shaped chamber which has two parts – one is a tangential port and anothe... more A vortex diode is a disc-shaped chamber which has two parts – one is a tangential port and another one is an axial port. Vortex diode is mainly used as leaky non-return valves in applications where it is desirable to avoid valves with moving parts. So, due to the absence of moving parts, it is maintenance free and suitable for radioactive liquid transfer application. For these specific reasons, it is widely used in nuclear industry as fluidic device. Also, it has vast applications in medical science also. The flow pattern in vortex diode is really interesting. The flow entering through the tangential port sets up a vortex. On the other hand, when fluid enters through the axial port creates a substantial radial flow. The first one is called reverse flow and the second one is called forward flow. Our main goal is to evaluate pressure drop characteristics for both flow patterns in different Reynold’s number in between 200 to 3000.

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Power System Analysis of The IEEE 14-Bus Test System Using PSAT and MATLAB

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—Voltage interruption can be happened by several reasons like blackout, brownout, noise, spike et... more —Voltage interruption can be happened by several reasons like blackout, brownout, noise, spike etc. Those incidents have consequential effect on computer's hardware such as data losses, burning of sensitive equipment etc. So, UPS broadly called an uninterruptible power supply device is used in computer to provide a backup power source which will maintain the consistency in voltage and flow of electricity which in turn will provide consistent power input. Batteries are used as energy storage device in UPS which store electric energy during charging state and discharge that electric energy during any kind of interruption to provide backup as additional power source for the computer. So, the most important integral part of UPS is the battery pack which is used as energy storage device in UPS. Main goal of this paper is to design the suitable battery pack for UPS so that it can give maximum backup range to the computer within a certain economical range or cost limit. Also, another goal is to analyze the electrical and thermal parameters of the designed battery pack and cell and suggest better solutions to make the wet battery cell maintenance free (no need of addition of water). Index Terms—uninterruptable power supply, energy storage device, lead acid battery, battery maintenance, wet cell battery.

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University of Windsor, 2020

Permanent magnet synchronous motor (PMSM) is a better choice as a traction motor since it has hig... more Permanent magnet synchronous motor (PMSM) is a better choice as a traction motor since it has high power density and high torque capability within compact structure. However, accommodating such high power within compact space is a great challenge, as it is responsible for significant rise of heat in PMSM. As a result, there is considerable increase in operating temperature which in turn negatively affects the electromagnetic performance of the motor. Further, if the temperature rise exceeds the permissible limit, it can cause demagnetization of magnets, damage of insulation, bearing faults, etc. which in turn affect the overall lifecycle of the motor. Therefore, thermal issues need to be dealt with carefully during the design phase of PMSM. Hence, the main focus of this thesis is to develop efficient ways for thermal modeling to address thermal issues properly. Firstly, a universal lumped parameter thermal network (LPTN) is proposed which can be used for all types of PMSMs regardless of any winding configuration and any position of magnets in the rotor. Further, a computationally efficient finite element analysis (FEA) thermal model is proposed with a novel hybrid technique utilizing LPTN strategy for addressing the air gap convection in an efficient way. Both proposed LPTN and FEA thermal models are simplified ways to predict motor temperature with a comparatively less calculation process. Finally, the proposed thermal models have been experimentally validated for the newly designed interior and surface mounted PMSM prototypes. Again, a procedure for effective cooling design process of PMSM has been suggested by developing an algorithm for cooling design optimization of the motor. Further, a computational fluid dynamics (CFD) model with a proposed two-way electro-thermal co-analysis strategy has been developed to predict both thermal and electromagnetic performance of PMSM more accurately considering the active cooling system. The developed step algorithm and CFD modeling approach will pave the way for future work on cooling design optimization of the newly designed interior and surface mounted PMSM prototypes.

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EECOMOBOLITY (ORF) & HEVPD&D CREATE Conference, 2019

High torque and high power generation in traction motors cause higher heat generation which in tu... more High torque and high power generation in traction motors cause higher heat generation which in turn can cause:- damage of insulation, bearing faults, demagnetization of magnets in PM traction motors. So, thermal stability is one of the most important issues for traction motors. Proper thermal design and analysis not only ensure thermal stability for traction motors, but also suggest proper and effective thermal management which in turn ensure good thermal performance of traction motors. The main focus of this poster paper is to describe different ways of thermal design and analysis of traction motor.

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