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매입형 영구자석 동기 전동기에서 일정 스위칭 주파수를 가지는 직접 토크 제어 기법의 속응성 향상

Direct Torque Control of Interior Permanent Magnet Synchronous Motors for Fast Dynamic Response with Constant Switching Frequency

  • 신은결 (Shin Eun-Kyeol, 아주대학교 일반대학원)

초록/요약

This thesis proposes the direct torque control (DTC) of interior permanent magnet synchronous motors for fast dynamic response with constant switching frequency. The conventional DTC consists of the hysteresis torque and flux controllers with the torque and flux errors as input. The switching frequency of DTC with the hysteresis controllers is not fixed. In the DTC with constant switching frequency, a torque regulator with a constant switching frequency is applied instead of the hysteresis torque controller for the conventional DTC. As a result, the DTC with constant switching frequency overcome the problem that the switching frequency of conventional DTC is not constant. The DTC with constant switching frequency uses a torque regulator with a proportional-integral (PI) torque controller and a triangular carrier wave to realize a constant switching frequency. Compared to the conventional DTC, the dynamic response of DTC with constant switching frequency is slow because both voltage vectors increasing and decreasing torque are selected during the transient state. Therefore, the bandwidth of PI torque controller is varied to improve the dynamic response of the DTC with constant switching frequency. The effectiveness of the proposed DTC with constant switching frequency is validated through simulation results.

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목차

제1장 서론 1
제2장 제안하는 일정 스위칭 주파수를 가지는 DTC 기법 3
2.1 일정 스위칭 주파수를 가지는 DTC 기법 3
2.2 속응성이 향상된 일정 스위칭 주파수를 가지는 DTC 기법 8
제3장 퍼지 로직 제어기의 설계 9
3.1 퍼지 로직 제어 9
3.2 퍼지 로직 제어기를 이용한 대역폭 설정 10
제4장 시뮬레이션 결과 15
4.1 시뮬레이션 회로도 및 파라미터 15
4.2 제안하는 일정 스위칭 주파수를 가지는 DTC 기법의 시뮬레이션 결과 17
제5장 결론 20

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