基于锁相技术的幅值相位可调电源的研制

本文提出了一种基于锁相技术的正弦电源的解决方案；该电源的输出信号与输入信号的相位差可调、输出幅值可调。本系统针对输出信号相位对输入信号相位跟踪的动态特性设计了基于CD4046的锁相电路和相位控制电路；该系统由于应用了正弦脉宽调制，因此易于调压，同时采用了电流闭环反应及电压闭反馈来稳定输出电压及提供系统保护，实验结果表明，该电源具有良好的输出波形，相位跟踪稳定、调节方便，可以用于无功连续补偿及高动态响应的稳压电源。

Design of power source with adjustable voltage and phase based on phase-locking technology

This paper proposed a new kind of AC power source whose voltage amplitude and phase difference between output signal and input signal could be adjusted.The source was based on phase locking technology.According to the dynamic phase tracing characteristics,the phase locking circuit and phase controlling circuit based on CD4046 were designed.The use of SPWM made voltage adjustment more easy.Voltage and current loop were adopted to regulate output voltage and protect the source.The experimental results show that the output waves of AC source were satisfactory,phase tracing was steady and the voltage could be adjusted easily.This kind of AC source can be used in continuous compensation of reactive power and voltage regulator source with highly sensible dynamic characteristics.