采样-保持鉴相器锁相调速系统的稳定运行范围及频率捕捉分析

Analysis of Stable Operation Range and Frequency Acquisition Process for PLL Speed Control System with Sample-and-hold Phase Detector

对于采用采样 -保持鉴相器的锁相调速系统 ,根据建立的电动机转速与相差间关系 ,用较文献 [1]更精确的方法 ,分析了锁相调速系统的稳定运行范围 ,首次推导出这类锁相系统的频率捕捉范围 。

This paper analyses the stable operation range and th e frequency capture operation for the PLL speed control system(PLSC) with sample -and-hold phase detector (SHPD). The analysis is based on the relationship est ablished between motor speed and phase difference. The result is more accurate t han that in article . The frequency capture range is derived first for this kind of PLSC. The lock-in process is also studied.