Ground Current Crosstalk Analysis and Suppression in High Power Cascaded Chopper Braking Circuit

  • Peifei Li
  • Lei Zhang
  • Xiaofei Zhai
  • Bin OuyangEmail author
Original Article


This paper systematically investigates the ground current crosstalk (GCC) of high-power cascaded chopper braking circuit (CCBC). Turning on and off the IGBTs of the CCBC will generate GCC problem between the upper and lower chopper braking circuits. The GCC may cause the freewheeling diode to be hard-off, resulting in strong electromagnetic interference and serious losses, and even causing the freewheeling diode to fail due to reverse recovery. This paper establishes the ground current model of CCBC and the GCC is predicted base on the model. To minimize the influence of GCC, the solutions of inserting damping resistors to the ground current path and optimizing IGBT timing are proposed. The correctness of the analysis is verified by simulations and experiments. The proposed methods are of great significance for improving the reliability of high-power cascaded chopper braking devices and reducing electromagnetic interference and losses.


Cascaded chopper braking circuit Ground current crosstalk Hard-off Damping resistor 



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Copyright information

© The Korean Institute of Electrical Engineers 2019

Authors and Affiliations

  • Peifei Li
    • 1
  • Lei Zhang
    • 1
  • Xiaofei Zhai
    • 1
  • Bin Ouyang
    • 1
    Email author
  1. 1.National Key Laboratory of Science and Technology on Vessel Integrated Power SystemNaval University of EngineeringWuhanChina

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