Frequency converter control system

The utility model discloses a frequency converter control system comprising a frequency converter, one end of which is in input connection with a three-phase power supply and the other end is in output connection with a motor; the control circuit comprises a self-locking branch circuit and a fault feedback branch circuit, and the self-locking branch circuit and the fault feedback branch circuit are connected with a three-phase power supply of the frequency converter in parallel; according to the utility model, the state of the frequency converter is monitored through the PLC equipment, abnormal alarm and fault power failure can be effectively realized, equipment damage caused by fault operation is greatly avoided, and operation harm and cost investment are reduced. 本实用新型公开了一种变频器控制系统，其包括变频器，其一端输入连接三相电源，另一端输出连接电机；以及控制电路，所述控制电路包括自锁支路和故障反馈支路，所述自锁支路和故障反馈支路并联连接变频器的三相电源；本实用新型通过PLC设备对变频器的状态进行监测，可以有效实现异常报警和故障断电，大大避免了故障运行造成的设备损坏，减少了运行危害和成本投入。