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The EMI Filter Design for GaN HEMT Based Two-Level Voltage Source Inverter

Wang, Xiaodan
http://rave.ohiolink.edu/etdc/view?acc_num=osu152424286628544

Abstract Details

2018, Master of Science, Ohio State University, Electrical and Computer Engineering.
Electromagnetic interference (EMI) is a common phenomenon as the introduction of fast switching wide bandgap devices in the high power density and high efficiency power converters operated under high temperature. The EM noise generated can be severe due to the fast-changing switching node voltage. To suppress EMI noise, EMI filters are inserted between the fast switching converters and the power supply. This work focuses the method to design the filters in both dc and ac sides. First, the SPICE model of a motor drive system is built. Based on the simulation model and the impact of high dv/dt, switching frequency, modulation index and load on EMI noise are explored. The mathematical description of EMI noise spectrum envelope in frequency domain is also analyzed. Then the common mode filter design procedure is illustrated in detail. The equivalent common mode circuit in the frequency domain is used to calculate the common mode choke impedance to meet the CISPR 25 standard. The relationship between the EMI filter volume and the switching frequency is investigated. The ac side LC filter design and optimization procedure is explained. The relationship between the ac side LC filter volume and the switching frequency is illustrated. Furthermore, the relationship between the total filter size in the system and the switching frequency is also obtained.
Jin Wang (Advisor)
Julia Zhang (Committee Member)
71 p.
Electrical Engineering
electromagnetic interference; EMI filter design; common mode choke; motor drive

Recommended Citations

Citations

  • Wang, X. (2018). The EMI Filter Design for GaN HEMT Based Two-Level Voltage Source Inverter [Master's thesis, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu152424286628544

    APA Style (7th edition)

  • Wang, Xiaodan. The EMI Filter Design for GaN HEMT Based Two-Level Voltage Source Inverter. 2018. Ohio State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu152424286628544.

    MLA Style (8th edition)

  • Wang, Xiaodan. "The EMI Filter Design for GaN HEMT Based Two-Level Voltage Source Inverter." Master's thesis, Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu152424286628544

    Chicago Manual of Style (17th edition)

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This open access ETD is published by The Ohio State University and OhioLINK.