CONTROLLER FOR SYNCHRONOUS MOTOR AND CONTROLLER FOR SYNCHRONOUS POWER GENERATOR

摘要

To easily estimate the temperature of a magnet without using a sensor for monitoring temperatures.SOLUTION: Application of a voltage is stopped for a predetermined length of time when a power generation motor is activated, the inverse electromotive force of the synchronous motor is measured in the stop time when the application of a voltage is stopped, and the temperature of the magnet of the synchronous motor is operated using the measured inverse electromotive force. Power generation of the power generation motor is temporarily stopped for a predetermined length of time when the power generation motor is generating power, the inverse electromotive force of the power generation motor is measured in the time when the power generation is stopped, and the temperature of the magnet of the power generation motor is operated using the measured inverse electromotive force.SELECTED DRAWING: Figure 2