| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a motor control drive device that reduces the loss of rotor phase estimation more than conventional ones. <P>SOLUTION: The motor control drive device, which drives a permanent magnet synchronous motor by supplying a voltage to the respective phase windings of the permanent magnet synchronous motor of a sensorless control system, includes a phase voltage detection means for detecting a phase voltage supplied to the permanent magnet synchronous motor, a zero-cross point detection means for detecting a zero-cross point of the phase voltage, a phase calculation means for calculating a rotor phase estimation value of the permanent magnet synchronous motor from the zero-cross point, and a phase correction means for calculating a correction phase estimation value by correcting the phase estimation value to an appropriate value in conformity with the zero-cross point at the timing of the zero-cross point. <P>COPYRIGHT: (C)2011,JPO&INPIT |
