대한전기학회:학술대회논문집 (Proceedings of the KIEE Conference)
- 대한전기학회 2007년도 제38회 하계학술대회
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- Pages.1632-1633
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- 2007
컨버터의 폐루프 식별 및 제어기 설계
Closed-loop Identification and Controller Design for a Converter
- Yun, Kyong-Han (Chungbuk National University) ;
- Lim, Yeon-Soo (Chungbuk National University) ;
- Jin, Li-Hua (Chungbuk National University) ;
- Kim, Jae-Jin (POSCON) ;
- Kim, Young-Chol (Chungbuk National University)
- 발행 : 2007.07.18
초록
This paper presents a new method of designing digital controller based on closed-loop identification of a pulse width modulation (PWM) converter system. We consider the control system structure which is composed of both current control loop and voltage control loop. The current controller can be designed independently of voltage loop. Whereas voltage controller can not do easily due to the PWM switching component which is nonlinear in nature. Furthermore, the control objective of inner loop is to track the sine wave of 60 Hz, but the outer loop shall maintain the constant DC voltage irrespective to load change. To systematically design outer loop controller, we propose a method finding linear approximate model of the nonlinear inner loop part including current controller by closed loop identification. Based on the identified model, we show that a simple digital voltage controller can be directly designed and it has good performance.
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