| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electric motor controller having characteristic in which a phase is stable at a weak phase position and capable of immediately changing the phase even at the time of low-temperature start-up. <P>SOLUTION: The controller is provided with a hydraulic mechanism for supplying or discharging a working oil to or from a delay angle side working chamber for relatively rotating a rotor to hold it at a strong phase position strengthening a composite magnetic flux by a magnetic piece and an advance angle side working chamber for holding the rotor at a weak phase position for weakening the composite magnetic flux. If it is judged that an electric motor, more specifically, a combustion engine is stopped (S10), the hydraulic mechanism is operated so that the working oil is supplied and discharged to and from the delay angle side and advance angle side working chambers to reciprocate the rotor between the strong phase position and the weak phase position and the working oil in the advance angle side working position can be discharged (S18 to S38). <P>COPYRIGHT: (C)2009,JPO&INPIT |
