| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a brake torque during coasting, without increasing the number of device components in a synchronous motor controlling apparatus for driving a permanent magnet synchronous motor. <P>SOLUTION: A synchronous motor controlling apparatus includes a DC power supply, an inverter device, and a filter capacitor connected between the DC power supply and the inverter device; and the synchronous motor controller drives at least one or more permanent magnet synchronous motors by the inverter device. When the induced voltage of the permanent magnet synchronous motor becomes higher than or equal to a first reference value in a coasting state of traveling by inertia, while stopping the inverter device, the DC power supply is operated such that a voltage on the DC side of the inverter device can be higher than or equal to a second reference value set, on the basis of the induced voltage. <P>COPYRIGHT: (C)2010,JPO&INPIT |
