Apparatus and method for minimizing influence of temperature change in motor

摘要

An apparatus for minimizing an influence of a temperature change may include a motor, a temperature sensor for sensing a temperature of the motor to create the temperature information, a command compensation unit compensating a torque command or a magnetic flux demand according to the information on the sensed temperature to create a compensation torque command value or a compensation magnetic flux command value, and an inverter for driving the motor according to a D-axis voltage command value and a Q-axis voltage command value are created according to a D-axis current command value and a Q-axis current command value which are matched with the compensation torque command value or the compensation magnetic flux command value.

主权项

1. A motor apparatus comprising;
a motor comprising a stator and a rotor; a temperature sensor configured to sense the stator's temperature; a command compensation unit configured to receive and compensate an input torque command and an input magnetic flux command to provide a compensation torque command value and a compensation magnetic flux command value, wherein the compensation torque command value is computed using the input torque command and a back electromotive force value that is computed based on the rotor's temperature estimated from the stator's temperature, wherein the compensation flux command value is computed using the input magnetic flux command and the back electromotive force value that is computed based on the rotor's temperature estimated from the stator's temperature; a D-axis current command table configured to provide a D-axis current command value corresponding to a set of the compensation torque command value and the compensation magnetic flux command value; a Q-axis current command table configured to provide a Q-axis current command value corresponding to the set of the compensation torque command value and the compensation magnetic flux command value; a current controller configured to create a D-axis voltage command value and a Q-axis voltage command value based on the D-axis current command value and the Q-axis current command value; and an inverter configured to drive the motor according to the D-axis voltage command value and the Q-axis voltage command value.