| 摘要 |
<P>PROBLEM TO BE SOLVED: To start a synchronous electric motor while controlling the charging state of a capacitor 30 prior to the drive of the three-phase AC synchronous electric motor. <P>SOLUTION: In a drive unit of the three-phase synchronous electric motor, a rotor is synchronized with a rotating magnetic field generated from a stator coil by using an initial state synchronization control part 53B prior to the execution of a normal drive control part 56, and the charging state of the capacitor 30 is controlled. Accordingly, a large current is prevented from flowing to the capacitor immediately after the start of the execution of the normal drive control part 56. Accompanied by this, the execution of the normal drive control part 56 can be started in a state that an output voltage of the capacitor is stabilized without causing an effect that the operation state of the three-phase synchronous electric motor becomes unstable. <P>COPYRIGHT: (C)2010,JPO&INPIT |
