Auxiliary subsystems of a General-Purpose IGBT Stack for high-performance laboratory power converters

A PWM converter is the prime component in many power electronic applications such as static UPS, electric motor drives, power quality conditioners and renewable-energy-based power generation systems. While there are a number of computer simulation tools available today for studying power electronic systems, the value added by the experience of building a power converter and controlling it to function as desired is unparalleled. A student, in the process, not only understands power electronic concepts better, but also gains insights into other essential engineering aspects of auxiliary subsystems such as start-up, sensing, protection, circuit layout design, mechanical arrangement and system integration. Higher levels of protection features are critical for the converters used in a laboratory environment, as advanced protection schemes could prevent unanticipated failures occurring during the course of research. This paper presents a laboratory-built General-Purpose IGBT Stack (GPIS), which facilitates students to practically realize different power converter topologies. Essential subsystems for a complete power converter system is presented covering details of semiconductor device driving, sensing circuit, protection mechanism, system start-up, relaying and critical PCB layout design, followed by a brief comparison to commercially available IGBT stacks. The results show the high performance that can be obtained by the GPIS converter.

[1]  Anil K Adapa,et al.  Gate Drive Card for High Power Three Phase PWM Converters , 2011 .

[2]  Vinod John,et al.  A Resonant Integrator Based PLL and AC Current Controller for Single Phase Grid Connected PWM-VSI , 2010 .

[3]  V. John,et al.  Active damping of LCL filter at low switching to resonance frequency ratio , 2015 .

[4]  Vinod John,et al.  A grid simulator to evaluate control performance of grid-connected inverters , 2014, 2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES).

[5]  Vinod John,et al.  Low-frequency dc bus ripple cancellation in single phase pulse-width modulation inverters , 2015 .

[6]  G. Narayanan,et al.  Experimental study on the influence of dead-time on IGBT turn-off characteristics in an inverter leg at high and low currents , 2016, 2016 7th India International Conference on Power Electronics (IICPE).

[7]  Amit Kumar Jain,et al.  $V_{CE}$ Sensing for IGBT Protection in NPC Three Level Converters—Causes For Spurious Trippings and Their Elimination , 2011, IEEE Transactions on Power Electronics.

[8]  Vinod John,et al.  Digital Dead Time Logic and Protection Circuitry for PWM Voltage Source Converters , 2011 .

[9]  Viswanathan Subramani,et al.  Mitigation of Lower Order Harmonics in a Grid-Connected Single-Phase PV Inverter , 2014 .

[10]  Vinod John,et al.  Design and comparative study of discrete and module-based IGBT power converters , 2017 .

[11]  M.D. Manjrekar,et al.  A Reconfigurable Uninterruptible Power Supply System for Multiple Power Quality Applications , 2007, IEEE Transactions on Power Electronics.

[12]  Zhe Chen,et al.  A Review of the State of the Art of Power Electronics for Wind Turbines , 2009, IEEE Transactions on Power Electronics.

[13]  Johann W. Kolar,et al.  Analytical calculation of the RMS current stress on the DC-link capacitor of voltage-PWM converter systems , 2006 .

[14]  B. G. Fernandes,et al.  Unique Power Electronics and Drives Experimental Bench (PEDEB) to Facilitate Learning and Research , 2012, IEEE Transactions on Education.

[15]  Vinod John,et al.  Integrated higher-order pulse-width modulation filter-transformer structure for single-phase static compensator , 2013 .

[16]  Neeraj Agrawal.  Control and Start-up Diagnostics of Three Phase Inverters , 2013 .

[17]  Fabio Brucchi,et al.  Design Considerations to Increase Power Density in Welding Machines Converters Using TRENCHSTOP 5 IGBT , 2014 .

[18]  Vinod John,et al.  Low current switching behavior of IGBT and associated spurious tripping in inverters employing VCE de-saturation protection , 2016, 2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES).