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Papers by Pradip Chatterjee

IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018

The increase in voltage and power levels of more electric aircraft (MEA) necessitates fast and in... more The increase in voltage and power levels of more electric aircraft (MEA) necessitates fast and intelligent protection circuits. Due to the advantage of faster response time, no arc during turn-off and higher reliability, solid-state power controllers (SSPCs) are preferred over electro-mechanical switches. This paper reports a SiC based SSPC connected between the DC bus and downstream capacitive loads. An RC assisted gate voltage control method is presented to pre-charge the capacitive load without any inrush current. Experimental results demonstrating charging of 500 µF within 15 ms without hitting the device SOA limit is presented. Also, a thorough design of over-voltage protection circuit of SSPC is included in this paper to protect SSPC against lightening transients and against voltage spike while breaking short-circuit fault current. Series, parallel combinations of Transient Voltage Suppressor (TVS) diodes are connected across SSPC to keep the peak device voltage below its breakdown voltage. Simulation results are reported for validating the design.

2017 Asian Conference on Energy, Power and Transportation Electrification (ACEPT), 2017

Thermal management for power electronics is gaining lot of attention over the recent years due to... more Thermal management for power electronics is gaining lot of attention over the recent years due to the harsh environmental requirements of electro-mechanical system usage. Conventional thermal solutions for power electronics using passive & active cooling techniques like heat sinks and fans are effective and cost efficient. But the new systems require highly power dense packaging design, which in turn makes the design engineers to opt for novel, smaller & lightweight thermal solutions. This paper focusses on the research work conducted to design and develop an embedded thermal management solution for a low power electronics PCB using additive manufacturing technique. Embedded thermal management materials used for this study are flat heat pipes, pyrolytic graphite sheets and dual cool jets. In addition to understanding the thermal performance of the above mentioned combination of materials, a technique to manufacture the PCB with customized embedded thermal solutions is also proposed in this paper. In order to prove the performance of the idea proposed, thermal and CFD simulations were done for different combination of designs. Also to validate the simulations results an experimental setup of a particular power electronics application was tested with the heat pipes and graphite sheets using thermal camera.

Introduction The car owner has, unknowingly, been spoiled for many decades by a seamless network ... more Introduction The car owner has, unknowingly, been spoiled for many decades by a seamless network of refuelling stops. The thought of having to plan a journey optimised around the location of gas and service stations is utterly unfamiliar. However, this is probably one of the initial thoughts going through the minds of those considering purchasing or leasing a battery electric vehicle (BEV). Although the automobile is used by many primarily for short journeys well within the range of a BEV, it is the exceptions, such as a weekend away or the annual vacation, that cause concern.

Additive manufacturing(AM) or 3D printing is one of the fastest growing technologies that has bee... more Additive manufacturing(AM) or 3D printing is one of the fastest growing technologies that has been successfully implemented in various fields. The technique of building components by addition of material rather than the conventional subtractive manufacturing has opened up new realm of product design possibilities. From using AM for prototyping purpose it has evolved to make working parts it started replacing the conventional machines from the production lines. All the engineering disciplines, medical applications, fashion and jewelery designs, hobbyist etc. utilizes 3D printing to build efficient prototypes and products. In this paper, potential application of 3D printing for parts of electrical power converters has been identified and discussed. Surge in the dependence of electromechanical machines had urged to improve the performance of electrical power converters and their form factor. High power density requirements, compactness, rugged environments of usage poses challenges for...

ATZelectronics worldwide, 2020

The availability of a fast DC charging infrastructure is essential for the success of battery-pow... more The availability of a fast DC charging infrastructure is essential for the success of battery-powered electric vehicles. Infineon describes how to provide reasonable opportunities for fast charging with acceptable charging time.

2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2015

Competition in the aircraft industry market and global warming has driven the industry to think a... more Competition in the aircraft industry market and global warming has driven the industry to think along economic and environmental lines. This has resulted in the emergence of More Electric Aircraft (MEA). A new DC standards for power distribution has been obtained with 270 V DC on board of MEA. Because of its high electric power demand MEA requires high energy density batteries and DC-DC converter system. The DC-DC converter functions as a charger for batteries. The features like high performance and galvanic isolation make the phase shifted bidirectional DC-DC converter (also known as Dual Active Bridge) a strong candidates amongst the available DC-DC converters. In this paper, authors have integrated a high energy density Li-ion battery system with power distribution DC bus using phase shifted high power bidirectional (PSHPB) DC-DC converter and proposed a simple dynamic duty cycle control (DDCC) algorithm for its operation under dynamic conditions. The full system is verified under different dynamic conditions with variations in output current (load) and input voltage (line). The modeling has been done in MATLAB® Simulink environment, and simulation results are presented and discussed in the paper.

2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC), 2016

Solid State Power Controller (SSPC) is gaining popularity, replacing mechanical switches and circ... more Solid State Power Controller (SSPC) is gaining popularity, replacing mechanical switches and circuit breakers, in niche markets like electrical power distribution systems of the more electric aircraft. Significant amount of research is being conducted to develop high power SSPCs to cater the dynamic, distributed load management. The 28V SSPCs are widely used for protection and control of the secondary distribution system. Although there are high current SSPCs for low bus voltages, the 270V SSPCs are not mature and high current 270V SSPCs are not available in the market or having limited capability, which would be used in the primary power distribution system of the aircraft. This paper presents the market availability, design challenges the design engineer should be aware of and various approaches adopted to design and develop a high current 270V DC SSPC for more electric aircraft system, its key features which may not have been available in the traditional switches and future trends.

IECON 2018 - 44th Annual Conference of the IEEE Industrial Electronics Society, 2018

The increase in voltage and power levels of more electric aircraft (MEA) necessitates fast and in... more The increase in voltage and power levels of more electric aircraft (MEA) necessitates fast and intelligent protection circuits. Due to the advantage of faster response time, no arc during turn-off and higher reliability, solid-state power controllers (SSPCs) are preferred over electro-mechanical switches. This paper reports a SiC based SSPC connected between the DC bus and downstream capacitive loads. An RC assisted gate voltage control method is presented to pre-charge the capacitive load without any inrush current. Experimental results demonstrating charging of 500 µF within 15 ms without hitting the device SOA limit is presented. Also, a thorough design of over-voltage protection circuit of SSPC is included in this paper to protect SSPC against lightening transients and against voltage spike while breaking short-circuit fault current. Series, parallel combinations of Transient Voltage Suppressor (TVS) diodes are connected across SSPC to keep the peak device voltage below its breakdown voltage. Simulation results are reported for validating the design.

2017 Asian Conference on Energy, Power and Transportation Electrification (ACEPT), 2017

Thermal management for power electronics is gaining lot of attention over the recent years due to... more Thermal management for power electronics is gaining lot of attention over the recent years due to the harsh environmental requirements of electro-mechanical system usage. Conventional thermal solutions for power electronics using passive & active cooling techniques like heat sinks and fans are effective and cost efficient. But the new systems require highly power dense packaging design, which in turn makes the design engineers to opt for novel, smaller & lightweight thermal solutions. This paper focusses on the research work conducted to design and develop an embedded thermal management solution for a low power electronics PCB using additive manufacturing technique. Embedded thermal management materials used for this study are flat heat pipes, pyrolytic graphite sheets and dual cool jets. In addition to understanding the thermal performance of the above mentioned combination of materials, a technique to manufacture the PCB with customized embedded thermal solutions is also proposed in this paper. In order to prove the performance of the idea proposed, thermal and CFD simulations were done for different combination of designs. Also to validate the simulations results an experimental setup of a particular power electronics application was tested with the heat pipes and graphite sheets using thermal camera.

Introduction The car owner has, unknowingly, been spoiled for many decades by a seamless network ... more Introduction The car owner has, unknowingly, been spoiled for many decades by a seamless network of refuelling stops. The thought of having to plan a journey optimised around the location of gas and service stations is utterly unfamiliar. However, this is probably one of the initial thoughts going through the minds of those considering purchasing or leasing a battery electric vehicle (BEV). Although the automobile is used by many primarily for short journeys well within the range of a BEV, it is the exceptions, such as a weekend away or the annual vacation, that cause concern.

Additive manufacturing(AM) or 3D printing is one of the fastest growing technologies that has bee... more Additive manufacturing(AM) or 3D printing is one of the fastest growing technologies that has been successfully implemented in various fields. The technique of building components by addition of material rather than the conventional subtractive manufacturing has opened up new realm of product design possibilities. From using AM for prototyping purpose it has evolved to make working parts it started replacing the conventional machines from the production lines. All the engineering disciplines, medical applications, fashion and jewelery designs, hobbyist etc. utilizes 3D printing to build efficient prototypes and products. In this paper, potential application of 3D printing for parts of electrical power converters has been identified and discussed. Surge in the dependence of electromechanical machines had urged to improve the performance of electrical power converters and their form factor. High power density requirements, compactness, rugged environments of usage poses challenges for...

ATZelectronics worldwide, 2020

The availability of a fast DC charging infrastructure is essential for the success of battery-pow... more The availability of a fast DC charging infrastructure is essential for the success of battery-powered electric vehicles. Infineon describes how to provide reasonable opportunities for fast charging with acceptable charging time.

2015 IEEE PES Asia-Pacific Power and Energy Engineering Conference (APPEEC), 2015

Competition in the aircraft industry market and global warming has driven the industry to think a... more Competition in the aircraft industry market and global warming has driven the industry to think along economic and environmental lines. This has resulted in the emergence of More Electric Aircraft (MEA). A new DC standards for power distribution has been obtained with 270 V DC on board of MEA. Because of its high electric power demand MEA requires high energy density batteries and DC-DC converter system. The DC-DC converter functions as a charger for batteries. The features like high performance and galvanic isolation make the phase shifted bidirectional DC-DC converter (also known as Dual Active Bridge) a strong candidates amongst the available DC-DC converters. In this paper, authors have integrated a high energy density Li-ion battery system with power distribution DC bus using phase shifted high power bidirectional (PSHPB) DC-DC converter and proposed a simple dynamic duty cycle control (DDCC) algorithm for its operation under dynamic conditions. The full system is verified under different dynamic conditions with variations in output current (load) and input voltage (line). The modeling has been done in MATLAB® Simulink environment, and simulation results are presented and discussed in the paper.

2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC), 2016

Solid State Power Controller (SSPC) is gaining popularity, replacing mechanical switches and circ... more Solid State Power Controller (SSPC) is gaining popularity, replacing mechanical switches and circuit breakers, in niche markets like electrical power distribution systems of the more electric aircraft. Significant amount of research is being conducted to develop high power SSPCs to cater the dynamic, distributed load management. The 28V SSPCs are widely used for protection and control of the secondary distribution system. Although there are high current SSPCs for low bus voltages, the 270V SSPCs are not mature and high current 270V SSPCs are not available in the market or having limited capability, which would be used in the primary power distribution system of the aircraft. This paper presents the market availability, design challenges the design engineer should be aware of and various approaches adopted to design and develop a high current 270V DC SSPC for more electric aircraft system, its key features which may not have been available in the traditional switches and future trends.