电源学报
電源學報
전원학보
JOURNAL OF POWER SUPPLY
2012年
5期
58-62
,共5页
戴永辉%洪巧文%蔡逢煌%王武
戴永輝%洪巧文%蔡逢煌%王武
대영휘%홍교문%채봉황%왕무
数字锁相环%多过零鉴相器%模糊PI
數字鎖相環%多過零鑒相器%模糊PI
수자쇄상배%다과령감상기%모호PI
DPLL%multi-zero-crossing phase detector%fuzzy PI
采用传统过零鉴相器的数字锁相环(DPLL)实现简单,当同步信号受干扰时会存在多个过零点,将导致鉴相失败。为解决这一问题,提出了多过零鉴相器:可以统计一个周期内的多个捕获周期值,结合同步信号采样,准确定位过零点,进而计算出相位差。随后,介绍了采用模糊PI控制的数字锁相环的软件实现流程。通过实验验证了该方法的可行性。
採用傳統過零鑒相器的數字鎖相環(DPLL)實現簡單,噹同步信號受榦擾時會存在多箇過零點,將導緻鑒相失敗。為解決這一問題,提齣瞭多過零鑒相器:可以統計一箇週期內的多箇捕穫週期值,結閤同步信號採樣,準確定位過零點,進而計算齣相位差。隨後,介紹瞭採用模糊PI控製的數字鎖相環的軟件實現流程。通過實驗驗證瞭該方法的可行性。
채용전통과령감상기적수자쇄상배(DPLL)실현간단,당동보신호수간우시회존재다개과영점,장도치감상실패。위해결저일문제,제출료다과령감상기:가이통계일개주기내적다개포획주기치,결합동보신호채양,준학정위과영점,진이계산출상위차。수후,개소료채용모호PI공제적수자쇄상배적연건실현류정。통과실험험증료해방법적가행성。
Although the digital phase-locked loop (DPLL) with traditional zero-crossing phase detector can be implemented conveniently, it becomes inability when the synchronization signal with interference would produce multi-zero-crossing results. To solve the problem, a multi-zero-crossing phase detector was proposed: the phase detector can get all capture values during one cycle and accurately locate the zero-crossing position of current with the sampling values of synchronization signal. Thus the phase error can be calculated. The software implementation of DPLL based on fuzzy PI controlling was proposed then. Finally, the feasibility was validated by experiments.