Journal of Power Electronics

The Korean Institute of Power Electronics (전력전자학회)
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Performance evaluation of GaN FET-based matrix converters with dv/dt filters for variable frequency drive applications

  • Lee, Taeyeong (Department of Electrical Engineering, Konkuk University) ;
  • Kim, Hokyeong (Department of Electrical Engineering, Konkuk University) ;
  • Lee, Nayoung (Department of Electrical Engineering, Konkuk University) ;
  • Chin, Taehoon (Department of Electrical Engineering, Konkuk University) ;
  • Bu, Hanyoung (Department of Electrical Engineering, Konkuk University) ;
  • Cho, Younghoon (Department of Electrical Engineering, Konkuk University)
  • Received : 2020.01.13
  • Accepted : 2020.02.21
  • Published : 2020.05.20
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Abstract

This paper evaluates the dv/dt performances of the motor input terminal fed by a gallium nitride (GaN) field effect transistor (FET) matrix converter for variable frequency drive applications. To limit the high dv/dt caused by the fast switching operation of GaN devices, a dv/dt filter is employed. With the dv/dt filter, the input terminal voltage can meet the standards suggested by National Electrical Manufacturers Association. On the other hand, when a GaN FET matrix converter and an electric motor are connected by a long cable, the parasitic impedance of the cable varies. This impedance mismatch results in voltage reflection (VR), and this VR causes a large surge voltage with severe ringing at the motor input terminal. Even in this case, the dv/dt filter effectively restricts the dv/dt of the voltage applied to the electric motor. Frequency response results are obtained through the transfer functions of the filter according to the applied position. Experiments are carried out using a 220 V/60 Hz induction motor and a GaN FET-based matrix converter prototype. The dv/dt filter performance with two positions and cable lengths of 5 m and 25 m is evaluated by comparing the obtained experimental results with the frequency response.

Keywords

Acknowledgement

This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIT) (No. 2017R1C1B2009425). This work was supported by "Human Resources Program in Energy Technology" of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea (No. 20194030202370).

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