| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power conversion device with a connected motor which suppresses a rise in capacitor voltage at the start of the motor. <P>SOLUTION: A control section (5) controls switching of switching elements (Su,Sv,Sw,Sx,Sy,Sz). A capacitor (3a) smooths ripples caused by the switching. At the start of a motor (7), the control section (5) applies to the motor (7) a high frequency current whose frequency is a startup maximum operating frequency or higher and magnitude is not enough to drive the motor (7) to thereby detect the position of a rotor (7a) of the motor (7), and controls the magnitude of motor currents (iu,iv,iw) in accordance with the detected position. <P>COPYRIGHT: (C)2012,JPO&INPIT |
