Motor control system for determining a reference d-axis current and a q-axis current

摘要

A motor control system for determining a reference d-axis current and a reference q-axis current is provided. The motor control system includes a motor, a DC power source and DC input lines, and a current command controller. The DC power source generates a bridge voltage across the DC input lines. The current command controller is configured to monitor the bridge voltage and a torque reference command. The current command controller is configured to calculate the reference q-axis current based on a torque reference command. The current command controller is configured to calculate the reference d-axis current based on a magnitude of the reference q-axis current.

主权项

1. A motor control system for determining a reference d-axis current and a reference q-axis current, comprising:
a motor; a DC power source and DC input lines, the DC power source generating a bridge voltage across the DC input lines;
a current command controller in communication with the motor and the DC input lines, the current command controller configured to:monitor the bridge voltage and a torque reference command;calculate the reference q-axis current based on the torque reference command; andcalculate the reference d-axis current based on a magnitude of the reference q-axis current, the reference d-axis current is based on a first region of operation if the magnitude of the reference q-axis current is less than or equal to a predetermined reference q-axis current value, and if a magnitude of a voltage command value is less than the bridge voltage, the reference d-axis current is set to zero in the first region of operation if the reference d-axis current as determined by a smoothening function is less than zero, and a second region of operation is selected to calculate the reference d-axis current if the magnitude of the reference q-axis current is greater than the predetermined reference q-axis current value and the magnitude of the voltage command is less than the bridge voltage.