| 摘要 |
PURPOSE:To accomplish the vector control of high torque-controlling precision, by setting a compensation value corresponding with a temperature difference between a rotor and a stator winding, on a temperature difference compensating circuit at the time of turning on a power source. CONSTITUTION:To a stator winding temperature detecting value theta1, the output thetaof a temperature difference compensating circuit 16 between a rotor and a stator winding is added, and as a rotor temperature estimate, the temperature correction of secondary resistance is executed. By a switch 18, based on the stator winding temperature detecting value theta1 and the reference setting value thetaa of an ambient temperature, a quantity corresponding with a temperature difference between the stator winding and the rotor at the time of turning on a power source is set on the temperature difference compensating circuit 16 as an initial value. As a result, also at the time of re-starting after service interruption and starting in the state of the high temperature of a motor, the temperature difference between the rotor and the stator winding can be exactly compensated for. |
