Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)
- 2007.07a
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- Pages.98-100
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- 2007
Rubust controller for inverter using CRA
CRA를 이용한 인버터 강인제어기 설계
- Lee, Jin-Mok (Chungbuk National University) ;
- Park, Ga-Woo (Chungbuk National University) ;
- Lee, Jae-Moon (Chungbuk National University) ;
- Jung, Hun-Sun (Chungbuk National University) ;
- Noh, Se-Jin (Chungbuk National University) ;
- Choi, Jae-Ho (Chungbuk National University)
- Published : 2007.07.02
Abstract
This paper proposes a robust digital controller for PWM voltage source inverter using CRA method. The usual inverter controller for the operation of constant voltage and constant frequency consists of a double looped PI controller for the outer voltage controller and the inner current controller, of which the order of characteristic polynomial is high and so the gain tuning is difficult. Considering the limited switching frequency of the devices and sampling frequency of the digital controller, the gain tuning is usually based on the engineering experiences with the try and error method. In this paper, the error-space approach is used to get the system model including the controller with low order, and the characteristic ratio assignment (CRA) method is proposed for the design of robust controller which has the advantage to design the optimal gain to meet the referenced response and overshoot within the limit range. The PSiM simulation and experience results are shown to verify the validity of the proposed controller.
Keywords