Voltage conversion control device for motor

摘要

Disclosed is a control device which performs voltage conversion control for a voltage conversion circuit between motor control circuits which control a plurality of motors and a power supply. The control device includes sampling means for sampling a DC voltage after voltage conversion, target voltage setting means for setting target voltages of the plurality of motors, selection means for selecting a target voltage to be converted by the voltage conversion circuit from among the plurality of target voltages, generation means for generating a sampling timing on the basis of a carrier signal of one of the motors having the unselected target voltage, and control means for performing voltage conversion control using the DC voltage sampled by the sampling means in response to the sampling timing for each sampling timing request of voltage conversion control.

主权项

1. A voltage conversion control device for a motor which performs voltage conversion control on a voltage conversion circuit provided between a motor control circuit controlling a plurality of motors and a power supply, the voltage conversion circuit configured to convert a DC voltage of the power supply to an input DC voltage necessary for driving the motor, the voltage conversion control device comprising:
sampling unit that detects a voltage across both ends of a capacitor provided between the motor control circuit and the voltage conversion circuit and sampling the input DC voltage converted by the voltage conversion circuit; target voltage setting unit that sets a target voltage of the input DC voltage for each motor; selection unit that selects a target voltage to be converted by the voltage conversion circuit from among a plurality of target voltages set by the target voltage setting unit; sampling timing generation unit that generates a sampling timing of sampling the input DC voltage converted by the voltage conversion circuit on the basis of a carrier signal of motor control on one of the motors having the target voltages not selected by the selection unit; and control unit that performs voltage conversion control using the input DC voltage sampled by the sampling unit in accordance with the sampling timing generated by the sampling timing generation unit for each sampling timing request of the voltage conversion control.