A New Controllable Active Clamp Algorithm for Switching Loss Reduction in a Module Integrated Converter System

  • Park, Chang-Seok (Dept. of Electrical Engineering, Kyungnam University) ;
  • Jung, Tae-Uk (Dept. of Electrical Engineering, Kyungnam University)
  • Received : 2014.10.17
  • Accepted : 2014.11.09
  • Published : 2014.12.01


This paper proposes a new switching algorithm for an active clamp snubber to improve the efficiency of a module integrated converter system. This system uses an active clamp method for the snubber circuit for the efficiency and reliability of the system. However, the active clamp snubber circuit has the disadvantage that system efficiency is decreased by switch operating time because of heat loss in resonance between the snubber capacitor and leakage inductance. To address this, this paper proposes a new switching algorithm. The proposed algorithm is a technique to reduce power consumption by reducing the resonance of the snubber switch operation time. Also, the snubber switch is operated at zero voltage switching by turning on the snubber switch before main switch turn-off. Simulation and experimental results are presented to show the validity of the proposed new active clamp control algorithm.


Supported by : National Research Foundation of Korea (NRF)


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