CONTROL SYSTEM, RECEIVING DEVICE, AND METHOD FOR CONTROLLING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a control system capable of predicting an output voltage command and controlling a three-phase AC motor even when a communication abnormality occurs.SOLUTION: A control system 1 comprises: a three-phase power converter 11 which applies voltage to a three-phase AC motor 4 on the basis of an output voltage command; a voltage command receiving processor 100 which outputs the output voltage command to the three-phase power converter 11; a current controller 16 which generates a voltage command; a voltage command transmitter 17 which transmits a voltage command and a confirmation signal; and a voltage command receiver 18 which receives the voltage command and the confirmation signal, and determines whether communication is normal on the basis of the confirmation signal. The voltage command receiving processor 100 comprises a prediction calculator 102, and a voltage command selector 103. The prediction calculator generates a prediction voltage command on the basis of the output output voltage command and an output voltage command one sampling before the output output voltage command. The voltage command selector outputs the received voltage command as the output voltage command when the communication is normal, and outputs the generated prediction voltage command as the output voltage command when the communication is not normal.SELECTED DRAWING: Figure 1