| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a driving method of a polyphase motor using simple control logic, capable of suppressing the generation of a start defect even when phase interruption abnormality occurs for a motor requiring the detection of a rotor position and the determination of an output phase corresponding to the rotor position at the start, a polyphase motor driving system, and a heat pump device to which they are applied. <P>SOLUTION: When the phase interruption abnormality occurs in an inverter circuit 13, a phase interruption abnormality detection part 61 detects the phase interruption abnormality, and a detection result is outputted from the phase interruption abnormality detection part 61 to a rotor position adjustment part 63. Then, the rotor position adjustment part 63 adjusts a rotor 31 to a position at which the torque of a brushless DC motor 30 can be generated by the output of the inverter circuit 13. In order to start from the positioned rotor position, a driving signal preparation part 16 prepares the driving signals of the inverter circuit 13, and the brushless DC motor 30 is driven. <P>COPYRIGHT: (C)2012,JPO&INPIT |
