Dr. Rajesh M . Pindoriya | Thapar University, Patiala (original) (raw)

Papers by Dr. Rajesh M . Pindoriya

2020 IEEE 9th Power India International Conference (PIICON), 2020

With increase in energy demand, more numbers of renewable energy systems (RES) are connected to t... more With increase in energy demand, more numbers of renewable energy systems (RES) are connected to the grid. The integration of RES to the main electrical grid, causes the distortion in current and voltage waveforms. This distorted waveform has detrimental effects to the loads connected to that system. Grid systems’ current and voltage waveforms are also non-sinusoidal, when non-linear loads are connected to it. In this paper, current and voltage waveforms data from both grid side and output terminal of wind farm are collected by connecting fluke power quality analyzer (PQA) instrument and harmonic content are examined. Later it is compared with institute of electrical and electronics engineers (IEEE) and international electro technical commission (IEC) standards limits and conclusions are drawn from the analysed results.

2022 IEEE Industry Applications Society Annual Meeting (IAS)

2018 IEEMA Engineer Infinite Conference (eTechNxT), 2018

This paper mainly focuses on the full order state observer for the vector control (field-oriented... more This paper mainly focuses on the full order state observer for the vector control (field-oriented control) of a surface mounted Permanent Magnet Synchronous Motor (PMSM) without the use of a speed sensor. Space Vector Pulse Width Modulation (SVPWM) technique has been used to generate three phase voltages from the dc link source. The inverter switches are designed here with no dead time compensation. The rotor speed is treated as an unknown parameter and the adaptation law for driving the estimated rotor speed is being carried out by the use of Popov's Hyper stability criteria. The proposed observer and the whole other system except the PWM generation block and the PMSM has been discretized i.e., the whole system is running at a variable sampling rate and rate transitions blocks have been used to make the bridges between the continuous and discrete subsystems. For making the observer to become dynamically faster the observer poles are fixed proportionally to its motor poles using...

2019 8th International Conference on Power Systems (ICPS)

This paper presents, transient and steady-state control strategy of a three-phase grid connected ... more This paper presents, transient and steady-state control strategy of a three-phase grid connected Permanent Magnet Synchronous Generator (PMSG) based on Wind Energy Generation System (WEGS). The converters have been interfaced with variable speed PMSG based on wind turbine and the power grid. The authors of the paper have put their significant contribution towards detecting the prior effects of the well-known faults in the operation of WEGS when connected to the power grid. When the faults occur at the grid, grid-side converter suffers because of change in inertia of the prior system due to which operation of the PMSG gets affected. It is observed that tuning of grid side converter is required due the fault occurred in the grid. Thus, it is observed that maintaining the constant DC link voltage is required for the abrupt-less operation. The simulation results of the faults such as three-phase line to line, line to ground, and realistic grid faults have been discussed in detail. This paper also reports the effectiveness of the power quality injected into the grid during the variable wind-speed turbine system. To pursue the above analysis a real time simulation tool RTDS has been used.

IEEE Industry Applications Magazine

2018 IEEE 8th Power India International Conference (PIICON), 2018

This paper discusses the design and performance analysis of low-cost acoustic chamber for measure... more This paper discusses the design and performance analysis of low-cost acoustic chamber for measurement of acoustic noise and vibration of electric machines. The purpose of this paper is to find the parameters that allow the characterization of acoustic chamber thereby making an attempt in deriving and obtaining the data of acoustic chamber. The parameters that are being calculated are acoustic transfer function, reverberation time, sound power level and cut-off frequency of acoustic chamber. To obtain the transfer function of acoustic chamber, a pair of microphones and amplifier as a source of sound have been used. Based on the results of transfer functions obtained between the pair of microphones, the cut-off frequency of acoustic chamber is determined and validated through Inverse Square Law. Noise measurements are conducted in both an ordinary environment (laboratory) and acoustic chamber. The acoustic chamber provides the free-field conditions, which satisfy the standard parameters required for the design and test for acoustic chamber. The results obtained both in an ordinary environment and acoustic chamber are compared to produce useful practical information about the noise level change caused by sound fields. The results obtained are found to be helpful in understanding the physical features and characteristics of acoustic chamber.

2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES), 2016

Motor is the heart of many industrial automation and motion control applications. Brushless DC (B... more Motor is the heart of many industrial automation and motion control applications. Brushless DC (BLDC) motor drives are widely used in a many applications, ranging from low to high power applications, because of their high efficiency, low maintenance, require small space, salient operation and high torque to power ratio, etc. The rotor position must be acquired in order to drive a BLDC motor. The position of the rotor is known by hall sensors and encoders, but when these types of sensors are used to drive BLDC motor, the circuits become very complex and large. Therefore accuracy and performance of BLDC motor drivers should be enhanced through sensorless technology. Many sensorless methods are existing in literature to sense the rotor position of motor, but this paper explain and proposed zero crossing back-EMF detection method. This paper work on analysis of sensorless techniques to sense the rotor position and PWM based speed control of inverter-fed sensorless BLDC motor. Modeling and simulation of three-phase star connected sensorless BLDC motor is done in MATLAB/Simulink environment. An accurate speed estimation has been achieved by using back EMF zero crossing speed estimation method. Fast response with negligible settling time has been obtained by this method of sensorless speed estimation of BLDC motor.

2017 7th International Conference on Power Systems (ICPS), 2017

This paper deals with the energy maximization and control analysis for the permanent magnet synch... more This paper deals with the energy maximization and control analysis for the permanent magnet synchronous generator (PMSG) based wind energy generation system (WEGS). The system consists of a wind turbine, a three-phase IGBT based rectifier on the generator side and a three-phase IGBT based inverter on the grid side converter system. The pitch angle control by perturbation and observation (P&O) algorithm for obtaining maximum power point tracking (MPPT). MPPT is most effective under, cold weather, cloudy or hazy days. A designed control technique is proposed for the MPPT mechanism of the system. This paper will explore in detail about the control analysis for both the generator and grid side converter system. Further, it will also discuss about the pitch angle control for the wind turbine in order to obtain maximum power for the complete wind energy generation system. The proposed WEGS for maximization of power is modelled, designed and simulated using MATLAB R2014b Simulink with its power system toolbox and discrete step solver incorporated in the simulation tool.

2015 IEEE Innovative Smart Grid Technologies - Asia (ISGT ASIA), 2015

This paper demonstrates the Field Programmable Gate Arrays (FPGAs) of design methodologies with a... more This paper demonstrates the Field Programmable Gate Arrays (FPGAs) of design methodologies with a focus on motor drive applications. Motor is the heart of many industrial automation and motion/drive control applications, but major problem arise in controlling the speed of the motor. Brushless DC (BLDC) motor is new and reliable motor because it has high efficiency, high torque to power ratio, lower maintenance due to brushless architecture and compact size, etc. This work presents FPGAs implementation for PWM based speed control of inverter-fed BLDC motor. The proposed methodology is first simulated for open loop and closed loop speed control. These simulation results are further verified through lab scale experimental set up. It has been observed that FPGAs based closed loop method improves the transient and steady state response in speed control of BLDC motor.

2015 IEEE Innovative Smart Grid Technologies - Asia (ISGT ASIA), 2015

Distributed energy resources (DER) based micro grid and Nano-grid framework is most technically v... more Distributed energy resources (DER) based micro grid and Nano-grid framework is most technically viable bottom-top approach to sustainably meet ever-increasing demand of rural and urban communities. Recently the growth of DC operative home appliances like mobile and lap top chargers, ovens and hair dryer's etc. are increasing and therefore a DC/DC converter is an efficient way to meet the electricity need from the local DER and helps in improving the system efficiency. This paper presents simulation results of a buck boost converter, MPPT algorithm (P & O method) for solar PV module and closed loop PI control system for obtaining constant 12 V and 24 V DC output voltage at DC bus. The proposed methodology is to extract maximum DC power from solar PV system and it is directly fed to DC load or DC Nano grid.

2021 IEEE Industry Applications Society Annual Meeting (IAS)

This paper determines the stability of Permanent Magnet Synchronous Motor (PMSM) drive using a Hi... more This paper determines the stability of Permanent Magnet Synchronous Motor (PMSM) drive using a High-Speed Sliding Mode Observer (HSSMO) technique. Generally, there are different methods to obtain the speed and position of PMSM drive using non-linear control techniques, such as, modal based high-speed method. The present method is using Back Electro-Motive Force (EMF) for the estimation position and speed of the PMSM drive. By using a sigmoid function in place of a signum function, HSSMO exemplifies robustness and reduces the time-delay problem that occurs due to signum function. HSSMO technique is validated its stability by using the Lyapunov Candidate Function (LCF). Simulation results are presented to verify HSSMO method. Experimental validation is under progress.

2020 21st National Power Systems Conference (NPSC), 2020

This paper describes the sensorless operation of the rotor position of a brushless permanent magn... more This paper describes the sensorless operation of the rotor position of a brushless permanent magnet synchronous motor (PMSM) drive. In order to estimate the rotor position of the brushless PMSM drive, the current slope detection technique is used. The concept involves the use of instantaneous three-phase stator currents and voltages to provide the instantaneous rotor position and speed of the PMSM drive. In-depth analysis and mathematical models include the analysis of the current slope detection technology, under the steady state and dynamic speed response of the permanent magnet synchronous motor drive’s rotor position sensorless operation. Initially use voltage frequency (V/F) control technology to start the brushless PMSM drives. When the PMSM drives reaches a few percent of the synchronous speed, the V/F control method will switch to the rotor position sensorless control algorithm. The sensorless control technique is implemented in MATLAB/Simulink environmental tools and furthe...

IEEE Transactions on Industrial Electronics, 2021

The magnetic field inside a machine is responsible for the mechanical excitation of the stator st... more The magnetic field inside a machine is responsible for the mechanical excitation of the stator structure, generating vibrations and thus, audible noise. In this paper, the Permanent Magnet Synchronous Motor (PMSM) is driven by using Sinusoidal Pulse Width Modulation (SPWM) technique, and then an investigation (cause and effect) of Acoustic Noise and Vibration (ANV) is presented. An equivalent lumped parametric modelling of end-to-end coaxially coupled shafts between PMSM and DC generator along with effective modal mass and modal participation factor accuracy enhancement technique, is presented to predict torsional vibration. The modal analysis approach is used to analyse the torsional vibration response, which is used to estimate the source of acoustic noise, and a mathematical approach is presented at the end to calculate ANV of electric drives. Theoretical and experimental investigations are carried out on a 1.07- kW, 4-poles, 36-slots, 3-phase PMSM drive. Analytical and numerical...

IEEE Transactions on Industry Applications, 2020

This article presents a novel application of Pseudorandom Triangular Pulsewidth Modulation (PTPWM... more This article presents a novel application of Pseudorandom Triangular Pulsewidth Modulation (PTPWM) technique on a permanent magnet synchronous motor (PMSM) drive to reduce acoustic noise and vibration (ANV). The proposed PTPWM method brings a significant reduction in torque ripples, acoustic noise, and vibrations in the motor, thereby enhancing the performance of the complete drive system under operation. The relationship between the stator current harmonics feed by drive and nonsinusoidal magnetic field flux distribution, with torque ripples is developed and analysed in this article. Furthermore, in-depth theoretical background and analysis about how PTPWM improves torque ripples, vibration, and acoustic noise of PMSM drives is presented. An extensive simulation and experimental investigations have been carried out for the validation of proposed control strategy.

This paper presents a state of the art on brushless Permanent Magnet Alternative Current (PMAC) a... more This paper presents a state of the art on brushless Permanent Magnet Alternative Current (PMAC) and Permanent Magnet Direct Current (PMDC) motor drives. The brushless PMAC and PMDC motor drives are the latest choices of researchers due to their high efficiency, silent operation, compact size, high reliability, and low maintenance requirements. These motors are preferred for numerous applications. An in-depth analysis of PMAC and PMDC motor drives have been discussed. The Permanent Magnets (PMs)motor drives can be classified into two categories, first is PMAC motor drives, i.e. PMSM and the second one is PMDC motordrives, i.e. BLDC motors. There has been a long misunderstanding between the two ways of driving and controlling a motor with no windings on the rotor but only PMs. In this paper given a comprehensive analysis of both motor drives. So, beginner of the research scholars are easily able to understand about brushless PMAC and PMDC motor drives.

Electric Power Components and Systems

Abstract— This article presents an experimental and theoretical investigation of acoustic noise a... more Abstract— This article presents an experimental and theoretical investigation of acoustic noise and vibration (ANV) produced by permanent magnet synchronous motor (PMSM)-based electric drive. The principal sources of ANV in PMSM are the natural frequency of oscillations for a structure, magnetostrictive push–pull forces, aero-dynamical and aero-mechanical forces, and the interaction of time and space harmonics in airgap flux density and armature flux density. Initially, a structural mathematical model of PMSM has been developed to determine the structural natural frequency component in the ANV pattern emitted from the PMSM. Later an analytical electrical model has been designed to assess the torque performance of the machine. Interaction of the torque ripple with the natural frequency oscillation has been demonstrated to establish the net acoustic pressure levels. Power electronic converter injects the time harmonics into the PMSM drives, which can be addressed by employing suitable control algorithms. To investigate the ANV of PMSM drive, a mathematical model of PMSM is developed and analyzed. The physical phenomenon responsible for ANV induced by Maxwell forces in the machine has been discussed extensively. Time-domain and frequency domain analysis is used to show the effects of changing the operating parameters of the power electronic converters on the ANV. The main focus of this work is to build a better understanding and to draw an operational concept of ANV produced by PMSM drive from deduced theoretical and experimental investigations. The experimental investigations are performed on a low-cost laboratory setup of PMSM drive and acoustic chamber to validate the theoretical deductions. Furthermore, a numerical techniques-based design approach for a reduction in ANV for PMSM drive is presented in this article. This approach reduces the space harmonics in the airgap flux density wave by altering the number of slots in PMSM. Hence, the effective torque pulsation reduction has also been reported.

2018 IEEMA Engineer Infinite Conference (eTechNxT), 2018

This paper discusses about the relative analysis of permanent magnet motors and switched reluctan... more This paper discusses about the relative analysis of permanent magnet motors and switched reluctance motors (SRM) capability of electric vehicles (EVs) and hybrid electric vehicles (HEVs) system. Nowadays the pollution of the environment is increasing due to conventional vehicles. Hence, to reduce the pollution electric motors are very beneficial. Presently use of high power density magnetic motors like, brushless DC (BLDC) motors and permanent magnet synchronous motors (PMSM) have been the primary choice in the EVs and HEVs. But these motors have problems with demagnetization, high cost and fault tolerance. Therefore, in future permanent magnet motors will be replaced with SRM for EVs and HEVs. Because of SRM have no permanent magnets on the rotor, higher torque to power ratio, low losses and low acoustic noise compare to BLDC motors and PMSM. This paper is based on the properties of the special electric motors for example performance analysis, power density control, torque ripple c...

2020 IEEE 9th Power India International Conference (PIICON), 2020

This paper presents a rotor position estimation scheme for high performance Permanent Magnet Sync... more This paper presents a rotor position estimation scheme for high performance Permanent Magnet Synchronous Motor (PMSM) drive. The rotor position of PMSM drive is estimated by measuring stator voltage and current quantity of PMSM drive. Initially the PMSM drive run by V/F control technique. Once the motor reaches up-to 10% of synchronous speed, then V/F control technique switch over to sensorless control algorithm. Sinusoidal Pulse Width Modulation (SPWM) technique has been used to generate three phase voltages from the dc link source. The closed-loop speed control has been shown to be effective from standstill to rated speed. Computer simulation and experimental results are presented to demonstrate the effectiveness of the scheme.

2020 IEEE 9th Power India International Conference (PIICON), 2020

With increase in energy demand, more numbers of renewable energy systems (RES) are connected to t... more With increase in energy demand, more numbers of renewable energy systems (RES) are connected to the grid. The integration of RES to the main electrical grid, causes the distortion in current and voltage waveforms. This distorted waveform has detrimental effects to the loads connected to that system. Grid systems’ current and voltage waveforms are also non-sinusoidal, when non-linear loads are connected to it. In this paper, current and voltage waveforms data from both grid side and output terminal of wind farm are collected by connecting fluke power quality analyzer (PQA) instrument and harmonic content are examined. Later it is compared with institute of electrical and electronics engineers (IEEE) and international electro technical commission (IEC) standards limits and conclusions are drawn from the analysed results.

2022 IEEE Industry Applications Society Annual Meeting (IAS)

2018 IEEMA Engineer Infinite Conference (eTechNxT), 2018

This paper mainly focuses on the full order state observer for the vector control (field-oriented... more This paper mainly focuses on the full order state observer for the vector control (field-oriented control) of a surface mounted Permanent Magnet Synchronous Motor (PMSM) without the use of a speed sensor. Space Vector Pulse Width Modulation (SVPWM) technique has been used to generate three phase voltages from the dc link source. The inverter switches are designed here with no dead time compensation. The rotor speed is treated as an unknown parameter and the adaptation law for driving the estimated rotor speed is being carried out by the use of Popov's Hyper stability criteria. The proposed observer and the whole other system except the PWM generation block and the PMSM has been discretized i.e., the whole system is running at a variable sampling rate and rate transitions blocks have been used to make the bridges between the continuous and discrete subsystems. For making the observer to become dynamically faster the observer poles are fixed proportionally to its motor poles using...

2019 8th International Conference on Power Systems (ICPS)

This paper presents, transient and steady-state control strategy of a three-phase grid connected ... more This paper presents, transient and steady-state control strategy of a three-phase grid connected Permanent Magnet Synchronous Generator (PMSG) based on Wind Energy Generation System (WEGS). The converters have been interfaced with variable speed PMSG based on wind turbine and the power grid. The authors of the paper have put their significant contribution towards detecting the prior effects of the well-known faults in the operation of WEGS when connected to the power grid. When the faults occur at the grid, grid-side converter suffers because of change in inertia of the prior system due to which operation of the PMSG gets affected. It is observed that tuning of grid side converter is required due the fault occurred in the grid. Thus, it is observed that maintaining the constant DC link voltage is required for the abrupt-less operation. The simulation results of the faults such as three-phase line to line, line to ground, and realistic grid faults have been discussed in detail. This paper also reports the effectiveness of the power quality injected into the grid during the variable wind-speed turbine system. To pursue the above analysis a real time simulation tool RTDS has been used.

IEEE Industry Applications Magazine

2018 IEEE 8th Power India International Conference (PIICON), 2018

This paper discusses the design and performance analysis of low-cost acoustic chamber for measure... more This paper discusses the design and performance analysis of low-cost acoustic chamber for measurement of acoustic noise and vibration of electric machines. The purpose of this paper is to find the parameters that allow the characterization of acoustic chamber thereby making an attempt in deriving and obtaining the data of acoustic chamber. The parameters that are being calculated are acoustic transfer function, reverberation time, sound power level and cut-off frequency of acoustic chamber. To obtain the transfer function of acoustic chamber, a pair of microphones and amplifier as a source of sound have been used. Based on the results of transfer functions obtained between the pair of microphones, the cut-off frequency of acoustic chamber is determined and validated through Inverse Square Law. Noise measurements are conducted in both an ordinary environment (laboratory) and acoustic chamber. The acoustic chamber provides the free-field conditions, which satisfy the standard parameters required for the design and test for acoustic chamber. The results obtained both in an ordinary environment and acoustic chamber are compared to produce useful practical information about the noise level change caused by sound fields. The results obtained are found to be helpful in understanding the physical features and characteristics of acoustic chamber.

2016 IEEE 1st International Conference on Power Electronics, Intelligent Control and Energy Systems (ICPEICES), 2016

Motor is the heart of many industrial automation and motion control applications. Brushless DC (B... more Motor is the heart of many industrial automation and motion control applications. Brushless DC (BLDC) motor drives are widely used in a many applications, ranging from low to high power applications, because of their high efficiency, low maintenance, require small space, salient operation and high torque to power ratio, etc. The rotor position must be acquired in order to drive a BLDC motor. The position of the rotor is known by hall sensors and encoders, but when these types of sensors are used to drive BLDC motor, the circuits become very complex and large. Therefore accuracy and performance of BLDC motor drivers should be enhanced through sensorless technology. Many sensorless methods are existing in literature to sense the rotor position of motor, but this paper explain and proposed zero crossing back-EMF detection method. This paper work on analysis of sensorless techniques to sense the rotor position and PWM based speed control of inverter-fed sensorless BLDC motor. Modeling and simulation of three-phase star connected sensorless BLDC motor is done in MATLAB/Simulink environment. An accurate speed estimation has been achieved by using back EMF zero crossing speed estimation method. Fast response with negligible settling time has been obtained by this method of sensorless speed estimation of BLDC motor.

2017 7th International Conference on Power Systems (ICPS), 2017

This paper deals with the energy maximization and control analysis for the permanent magnet synch... more This paper deals with the energy maximization and control analysis for the permanent magnet synchronous generator (PMSG) based wind energy generation system (WEGS). The system consists of a wind turbine, a three-phase IGBT based rectifier on the generator side and a three-phase IGBT based inverter on the grid side converter system. The pitch angle control by perturbation and observation (P&O) algorithm for obtaining maximum power point tracking (MPPT). MPPT is most effective under, cold weather, cloudy or hazy days. A designed control technique is proposed for the MPPT mechanism of the system. This paper will explore in detail about the control analysis for both the generator and grid side converter system. Further, it will also discuss about the pitch angle control for the wind turbine in order to obtain maximum power for the complete wind energy generation system. The proposed WEGS for maximization of power is modelled, designed and simulated using MATLAB R2014b Simulink with its power system toolbox and discrete step solver incorporated in the simulation tool.

2015 IEEE Innovative Smart Grid Technologies - Asia (ISGT ASIA), 2015

This paper demonstrates the Field Programmable Gate Arrays (FPGAs) of design methodologies with a... more This paper demonstrates the Field Programmable Gate Arrays (FPGAs) of design methodologies with a focus on motor drive applications. Motor is the heart of many industrial automation and motion/drive control applications, but major problem arise in controlling the speed of the motor. Brushless DC (BLDC) motor is new and reliable motor because it has high efficiency, high torque to power ratio, lower maintenance due to brushless architecture and compact size, etc. This work presents FPGAs implementation for PWM based speed control of inverter-fed BLDC motor. The proposed methodology is first simulated for open loop and closed loop speed control. These simulation results are further verified through lab scale experimental set up. It has been observed that FPGAs based closed loop method improves the transient and steady state response in speed control of BLDC motor.

2015 IEEE Innovative Smart Grid Technologies - Asia (ISGT ASIA), 2015

Distributed energy resources (DER) based micro grid and Nano-grid framework is most technically v... more Distributed energy resources (DER) based micro grid and Nano-grid framework is most technically viable bottom-top approach to sustainably meet ever-increasing demand of rural and urban communities. Recently the growth of DC operative home appliances like mobile and lap top chargers, ovens and hair dryer's etc. are increasing and therefore a DC/DC converter is an efficient way to meet the electricity need from the local DER and helps in improving the system efficiency. This paper presents simulation results of a buck boost converter, MPPT algorithm (P & O method) for solar PV module and closed loop PI control system for obtaining constant 12 V and 24 V DC output voltage at DC bus. The proposed methodology is to extract maximum DC power from solar PV system and it is directly fed to DC load or DC Nano grid.

2021 IEEE Industry Applications Society Annual Meeting (IAS)

This paper determines the stability of Permanent Magnet Synchronous Motor (PMSM) drive using a Hi... more This paper determines the stability of Permanent Magnet Synchronous Motor (PMSM) drive using a High-Speed Sliding Mode Observer (HSSMO) technique. Generally, there are different methods to obtain the speed and position of PMSM drive using non-linear control techniques, such as, modal based high-speed method. The present method is using Back Electro-Motive Force (EMF) for the estimation position and speed of the PMSM drive. By using a sigmoid function in place of a signum function, HSSMO exemplifies robustness and reduces the time-delay problem that occurs due to signum function. HSSMO technique is validated its stability by using the Lyapunov Candidate Function (LCF). Simulation results are presented to verify HSSMO method. Experimental validation is under progress.

2020 21st National Power Systems Conference (NPSC), 2020

This paper describes the sensorless operation of the rotor position of a brushless permanent magn... more This paper describes the sensorless operation of the rotor position of a brushless permanent magnet synchronous motor (PMSM) drive. In order to estimate the rotor position of the brushless PMSM drive, the current slope detection technique is used. The concept involves the use of instantaneous three-phase stator currents and voltages to provide the instantaneous rotor position and speed of the PMSM drive. In-depth analysis and mathematical models include the analysis of the current slope detection technology, under the steady state and dynamic speed response of the permanent magnet synchronous motor drive’s rotor position sensorless operation. Initially use voltage frequency (V/F) control technology to start the brushless PMSM drives. When the PMSM drives reaches a few percent of the synchronous speed, the V/F control method will switch to the rotor position sensorless control algorithm. The sensorless control technique is implemented in MATLAB/Simulink environmental tools and furthe...

IEEE Transactions on Industrial Electronics, 2021

The magnetic field inside a machine is responsible for the mechanical excitation of the stator st... more The magnetic field inside a machine is responsible for the mechanical excitation of the stator structure, generating vibrations and thus, audible noise. In this paper, the Permanent Magnet Synchronous Motor (PMSM) is driven by using Sinusoidal Pulse Width Modulation (SPWM) technique, and then an investigation (cause and effect) of Acoustic Noise and Vibration (ANV) is presented. An equivalent lumped parametric modelling of end-to-end coaxially coupled shafts between PMSM and DC generator along with effective modal mass and modal participation factor accuracy enhancement technique, is presented to predict torsional vibration. The modal analysis approach is used to analyse the torsional vibration response, which is used to estimate the source of acoustic noise, and a mathematical approach is presented at the end to calculate ANV of electric drives. Theoretical and experimental investigations are carried out on a 1.07- kW, 4-poles, 36-slots, 3-phase PMSM drive. Analytical and numerical...

IEEE Transactions on Industry Applications, 2020

This article presents a novel application of Pseudorandom Triangular Pulsewidth Modulation (PTPWM... more This article presents a novel application of Pseudorandom Triangular Pulsewidth Modulation (PTPWM) technique on a permanent magnet synchronous motor (PMSM) drive to reduce acoustic noise and vibration (ANV). The proposed PTPWM method brings a significant reduction in torque ripples, acoustic noise, and vibrations in the motor, thereby enhancing the performance of the complete drive system under operation. The relationship between the stator current harmonics feed by drive and nonsinusoidal magnetic field flux distribution, with torque ripples is developed and analysed in this article. Furthermore, in-depth theoretical background and analysis about how PTPWM improves torque ripples, vibration, and acoustic noise of PMSM drives is presented. An extensive simulation and experimental investigations have been carried out for the validation of proposed control strategy.

This paper presents a state of the art on brushless Permanent Magnet Alternative Current (PMAC) a... more This paper presents a state of the art on brushless Permanent Magnet Alternative Current (PMAC) and Permanent Magnet Direct Current (PMDC) motor drives. The brushless PMAC and PMDC motor drives are the latest choices of researchers due to their high efficiency, silent operation, compact size, high reliability, and low maintenance requirements. These motors are preferred for numerous applications. An in-depth analysis of PMAC and PMDC motor drives have been discussed. The Permanent Magnets (PMs)motor drives can be classified into two categories, first is PMAC motor drives, i.e. PMSM and the second one is PMDC motordrives, i.e. BLDC motors. There has been a long misunderstanding between the two ways of driving and controlling a motor with no windings on the rotor but only PMs. In this paper given a comprehensive analysis of both motor drives. So, beginner of the research scholars are easily able to understand about brushless PMAC and PMDC motor drives.

Electric Power Components and Systems

Abstract— This article presents an experimental and theoretical investigation of acoustic noise a... more Abstract— This article presents an experimental and theoretical investigation of acoustic noise and vibration (ANV) produced by permanent magnet synchronous motor (PMSM)-based electric drive. The principal sources of ANV in PMSM are the natural frequency of oscillations for a structure, magnetostrictive push–pull forces, aero-dynamical and aero-mechanical forces, and the interaction of time and space harmonics in airgap flux density and armature flux density. Initially, a structural mathematical model of PMSM has been developed to determine the structural natural frequency component in the ANV pattern emitted from the PMSM. Later an analytical electrical model has been designed to assess the torque performance of the machine. Interaction of the torque ripple with the natural frequency oscillation has been demonstrated to establish the net acoustic pressure levels. Power electronic converter injects the time harmonics into the PMSM drives, which can be addressed by employing suitable control algorithms. To investigate the ANV of PMSM drive, a mathematical model of PMSM is developed and analyzed. The physical phenomenon responsible for ANV induced by Maxwell forces in the machine has been discussed extensively. Time-domain and frequency domain analysis is used to show the effects of changing the operating parameters of the power electronic converters on the ANV. The main focus of this work is to build a better understanding and to draw an operational concept of ANV produced by PMSM drive from deduced theoretical and experimental investigations. The experimental investigations are performed on a low-cost laboratory setup of PMSM drive and acoustic chamber to validate the theoretical deductions. Furthermore, a numerical techniques-based design approach for a reduction in ANV for PMSM drive is presented in this article. This approach reduces the space harmonics in the airgap flux density wave by altering the number of slots in PMSM. Hence, the effective torque pulsation reduction has also been reported.

2018 IEEMA Engineer Infinite Conference (eTechNxT), 2018

This paper discusses about the relative analysis of permanent magnet motors and switched reluctan... more This paper discusses about the relative analysis of permanent magnet motors and switched reluctance motors (SRM) capability of electric vehicles (EVs) and hybrid electric vehicles (HEVs) system. Nowadays the pollution of the environment is increasing due to conventional vehicles. Hence, to reduce the pollution electric motors are very beneficial. Presently use of high power density magnetic motors like, brushless DC (BLDC) motors and permanent magnet synchronous motors (PMSM) have been the primary choice in the EVs and HEVs. But these motors have problems with demagnetization, high cost and fault tolerance. Therefore, in future permanent magnet motors will be replaced with SRM for EVs and HEVs. Because of SRM have no permanent magnets on the rotor, higher torque to power ratio, low losses and low acoustic noise compare to BLDC motors and PMSM. This paper is based on the properties of the special electric motors for example performance analysis, power density control, torque ripple c...

2020 IEEE 9th Power India International Conference (PIICON), 2020

This paper presents a rotor position estimation scheme for high performance Permanent Magnet Sync... more This paper presents a rotor position estimation scheme for high performance Permanent Magnet Synchronous Motor (PMSM) drive. The rotor position of PMSM drive is estimated by measuring stator voltage and current quantity of PMSM drive. Initially the PMSM drive run by V/F control technique. Once the motor reaches up-to 10% of synchronous speed, then V/F control technique switch over to sensorless control algorithm. Sinusoidal Pulse Width Modulation (SPWM) technique has been used to generate three phase voltages from the dc link source. The closed-loop speed control has been shown to be effective from standstill to rated speed. Computer simulation and experimental results are presented to demonstrate the effectiveness of the scheme.