| 摘要 |
<P>PROBLEM TO BE SOLVED: To realize maximum torque and current control even when a setting error exists in an electric constant of a permanent magnet synchronous motor. <P>SOLUTION: According to one embodiment, a controlling device of a permanent magnet synchronous motor comprises: feed-forward controlling means for adding feed-forward items for decoupling to a sum of outputs of a proportional controller and an integral controller; estimating means for estimating a rotor speed and a rotor position by using the output of the integral controller; D-axis current commanding means that applies an electric constant of a motor to a control expression of maximum torque and current control for obtaining maximum torque while minimizing a current flowing through the motor, and output a pre-correction D-axis current command value IdRef; and current phase correcting means that, when executing the maximum torque and current control, corrects the pre-correction D-axis current command value IdRef by an expression of IdRef'=IdRefcosΔθComp-IqRefsinΔθComp by using a correction angle ΔθComp and a Q-axis current command value IqRef determined so as to be able to correct setting deviation of the pre-correction D-axis current command value IdRef, and outputs a D-axis current command value IdRef'. <P>COPYRIGHT: (C)2013,JPO&INPIT |
