| 摘要 |
<P>PROBLEM TO BE SOLVED: To maximize the utilization of a section in which currents for two phases can be detected in one-shunt current detection method. <P>SOLUTION: A motor control device comprises: a motor current detecting part that detects a current flowing on a motor from a bus-bar current (detection current) flowing between a three-phase inverter and a DC power supply; and a determination part that determines whether or not a target time point belongs to a detectable period of time during which a motor current from the bus-bar current can be detected. When the determination part determines that the target time point belongs to the detectable period of time, a motor is vector-controlled by the motor current based on the bus-bar current. The determination part determines whether or not the present time belongs to the detectable period of time based on the size of the bus bar current (I<SB>DC2</SB>), and a primary difference value of the bus-bar current or a secondary difference value of the bus-bar current. <P>COPYRIGHT: (C)2009,JPO&INPIT |
