SOLID-STATE RELAY FOR RUNNING DIRECTION CONTROL OF THREE-PHASE ALTERNATING CURRENT MOTOR AND METHOD THEREOF

摘要

A solid state relay for controlling a three-phase AC motor running direction is provided, a driver module, power components module, phase sequence detection module, phase lack detection module, and automatic phase correction and phase lack protection logic module. The input of the phase sequence detection module is connected to the three-phase power supply, and the output is connected to the automatic phase correction and phase lack protection logic module, to provide phase sequence detection and a phase sequence signal to the automatic phase correction and phase lack protection logic module. The input of the phase lack detection module is connected to the three-phase power supply, and the output is connected to the automatic phase correction and phase lack protection logic module, to detect a lack of phase and provide the lacking phase signal to the automatic phase correction and phase lack protection logic module.

主权项

1. A solid state relay for the control of three-phase AC motor running direction, including the driver module and power components module, the driver module is connected to the power components module, the power components module is connected to the three-phase power supply and three-phase load, and phase sequence detection module, phase lack detection module, automatic phase correction and phase lack protection logic module are included;
among them, the input terminal of the phase sequence detection module is connected to the three-phase power supply, output terminal is connected to the automatic phase correction and phase lack protection logic module, which is used for detecting phase sequence of the three-phase power supply, and providing phase sequence signal to automatic phase correction and phase lack protection logic module; the input terminal of the phase lack detection module is connected to the three-phase power supply, output terminal is connected to the automatic phase correction and phase lack protection logic module, which is used for detecting three-phase power supply in the presence of phase lacking and providing the missing phase signal to automatic phase correction and phase lack protection logic module; the automatic phase correction and phase lack protection logic module further including: signal conversion unit, which is used for receive control signal and make it level conversion; signal processing unit, which is connected to signal conversion unit, and then be connected to the phase sequence detection module output terminal and phase lack detection module output terminal and the driver module, respectively, which is used for processing the control signal and then outputting the processed control results to driver module.