Motor control system, control device, and control method

摘要

A motor control system includes a plurality of motors, a plurality of inverters, and a controller. The plurality of inverters are configured to drive the plurality of respective motors and are coupled to a common bus line through which DC power is supplied. When power supply is interrupted, the controller is configured to calculate a frequency command value so as to maintain a bus line voltage across the common bus line and configured to supply the frequency command value to the plurality of inverters.

主权项

1. A motor control system comprising:
a plurality of motors; a plurality of inverters configured to drive the plurality of respective motors and coupled to a common bus line through which DC power is supplied; and a controller configured to, when power supply is interrupted, calculate a frequency command value so as to maintain a bus line voltage across the common bus line and configured to supply the frequency command value to the plurality of inverters, wherein the controller comprises:
a current target value calculator configured to calculate a current target value of a capacitor disposed at the common bus line so as to maintain the bus line voltage;a power target value calculator configured to calculate a power target value of the capacitor based on the bus line voltage and the current target value of the capacitor; anda frequency command value calculator configured to calculate the frequency command value based on the power target value of the capacitor.