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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2023.5
- 수록면
- 2,944 - 2,948 (5page)
이용수
초록· 키워드
오류제보하기
In the reported instability incidents of power converter-based systems, a constant-amplitude oscillation instead of divergence was often observed, which is the so-called limit cycle phenomenon. This does not agree with theoretical analysis based on classical linear control theory. Taking a synchronous buck converter as an example, this paper aims to investigate the underlying mechanism of the limit cycle phenomenon. It finds that this phenomenon results from the nonlinear controller saturation. To clarify the underlying mechanism, the controller saturation is linearized through the describing function method, then the generalized Nyquist stability criterion is applied. It reveals that the system operation point dynamically drifts and ultimately stays at the critically stable point, featuring the constant-amplitude oscillation. Moreover, the occurrence condition and the calculation of the oscillating amplitude and frequency are also explored. Simulations and experiments verify the correctness of the analysis.
목차
Abstract
I. INTRODUCTION
II. SYSTEM DESCRIPTION AND ACCURATE MODEL
III. EXPLORATION OF THE LIMIT CYCLE PHENOMENON BY DESCRIBING FUNCTION METHOD
IV. VERIFICATION
V. CONCLUSIONS
REFERENCES
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