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- 저자 : 문종주(JongJoo Moon) (검색결과 2 건)
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차량용 인버터의 능동단락회로 및 능동단락전류 거동에 관한 연구
문종주(Jongjoo Moon),문상현(Sanghyeon Moon) 한국자동차공학회 2022 한국자동차공학회 부문종합 학술대회 Vol.2022 No.6
This paper investigates the behavior of active short circuit (ASC) in order to protect an inverter and a motor when any faults occur on inverter system at high-speed operation region of motor. The implementation of ASC function is to control the inverter output to be a zero vector which state can be named three phases short (3PS) in the fault condition. The zero vector (3PS) can be generated through two approaches. One is from healthy main MCU, and second is from specific logic circuit to force the zero vector under the fault situation regardless of whether the MCU is healthy or unhealthy. This paper only considers the latter case. The ASC function causes unintended brake torque in the motor and the freewheeling current between the inverter and the motor which is called ASC-current. The ASC-current generates huge heat losses on the power module during transient state. Therefore, this paper proposes a strategy to make robust reliability for the inverter system. In addition, this paper includes the analysis of the ASC-current in transient and steady state by mathematics and simulation.
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영구자석 동기전동기 능동단락 회로 동작에 감자해석 관한 연구
유회총(Huai Cong Liu),김우정(WooJung Kim),문종주(JongJoo Moon),안일환(Il Hwan An) 한국자동차공학회 2022 한국자동차공학회 학술대회 및 전시회 Vol.2022 No.11
This paper investigates the behavior of active short circuit(ASC) in order to protect and inverter and a motor when any faults occur on inverter system at high-speed operation region of motor. The implementation of ASC function is to control the inverter output to be a zero vector which state can be named three phases short(3PS) in the fault condition. The ASC function causes unintended brake torque in the motor and the freewheeling current between the inverter and the motor which is called ASC-current. In general, the ASC current will be several times higher than the maximum power current. Therefore, the magnets selected for the motor design must ensure that they will not be demagnetized under the ASC current. This paper introduces an 8-pole 100kW permanent magnet synchronous motor, discussed the maximum current value of the motor in ASC state, and conducts finite element analysis of demagnetization through dynamic and static methods to verify the safety of permanent magnet selection.
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