基于闭环控制的高精度三相电源的设计

High Precision Three-Phase AC Power Supply Based on Closed-Loop Control Technique

针对某设备所需的三相电源相位精度要求高的特点,在传统DDS技术的基础之上,设计了一款高度对称的三相电源。该设计采用数字闭环控制模型,利用相位误差自动检测值作为反馈,在DDS模块中增加相位自动修正,以达到高精度稳频和高精度三相对称的目的。

In order to solve the requirement of high precision equal phase in three-phase AC power supply,one AC power supply is designed based the traditional DDS technology.In the design,the digital close-loop technology is adopted and the measured result from the automatic measuring phase difference circuit is used as the feedback and the phase difference is corrected and compensated in the DDS.Thus the high stability of frequency and equal phase is achieved.