光纤连接在高压变频器中的应用研究

Study of Optical Fiber Connection in High Voltage Frequency Convertor

为解决单元串联多电平高压变频器中主控系统与功率单元之间存在的强弱电隔离及功率单元与功率单元之间的电磁干扰问题,提出了采用光纤连接方法实现功率驱动PWM信号的远距离传送。设计了由HFBR-1524发送器和HFBR-2524接收器组成的光纤连接电路。实验结果表明,该方法能够实现PWM信号的精确传送。该电路已经在高压变频器的开发中得到应用。

High voltage isolation between main control system and power units,EMI immunity in different power units are the key problems in the cell series muti-level high voltage frequency converter. In this paper a method using optical fiber link is proposed to solve the problems. Experiment based on HFBR-1524 transmitter and HFBR-2524 receiver has proved PWM signals can be transferred precisely. This circuit has been applied in development of high voltage frequency converter successfully.