【摘要】 本文简述了锁相环路的基本原理,介绍了化纤纺丝机变频调速系统中应用的锁相环路线路及其达到的效果。实践表明,它解决了涤纶长丝高速纺丝变频电源的频率稳定度问题。更多还原

【Abstract】 The basic principles were briefly dealt with of the phase-locked loop. Its diagram was introduced to apply to the frequency changing device of the speed regulation system for synthetic fibre spinning machine, and the accomplished effects were given. These practices shown that the phase-lockd loop has made it possible to offer a stabilized frequency source for high speed spinning of the POY Dacron filament.更多还原