SiC MOSFET기반 200kW급 전기차 구동용모터드라이버 개발
Development of 200kW class electric vehicle traction motor driver based on SiC MOSFET
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초록
본 논문에서는 현재 출시되어 있는 전기차의 구동모터 사양을 대부분 포괄하는 200kW급 구동용 모터드라이버를 개발하였다. 고효율ㆍ고전력밀도를 달성하기 위해 기존 전력반도체(Insulated-gate bipolar transistor, IGBT)대신에 차세대 전력반도체(Siliconcarbide, SiC)를 적용하였으며 SiC를 최적사용하기 위해 하드웨어에 대한 분석을 통해, 예상되는 효율 및 방열특성을 구하여 최적설계를 하였다. 전기차 구동모터에 대부분 활용되는 매입형 영구자석 동기모터(Interior permanent-magnet synchronousmachine, IPMSM)를 위한 벡터 제어 알고리즘을 DSP를 활용하여 구현하였다. 본 논문에서는 SiC기반 전기차 구동용 모터드라이버 시작품을 설계ㆍ제작하였으며 실험을 통해 성능을 검증하였다.
Abstract
In this paper, A 200kW traction motor driver that covers most of the traction motor specification of commercialelectric vehicles (EV) is developed. In order to achieve high efficiency and high power density, a next-generationpower semiconductors (Silicon carbide, SiC) are applied instead of power semiconductor(IGBT), which is Si based. Through hardware analysis for optimal use of SiC, expected efficiency and heat dissipation characteristics areobtained. A vector control algorithm for an IPMSM (Interior permanent magnet synchronous motor), which ismostly used in EV(Electric vehicle) traction motor, is implemented using DSP (Digital signal processor). In thispaper, a prototype traction motor driver based SiC for EV is designed and manufactured, and its performance isverified through experiments.
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