| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform the regenerative operation of a motor without causing an overvoltage to the DC power supply side of an inverter without installing on a DC power supply a device like a battery capable of absorbing regenerative power. <P>SOLUTION: Maps of reverse rotation dq-axis current command values, which correspond to a torque command value and rotational speed of a motor and makes loss occurring in the motor and the inverter larger than the regenerative power of the motor, are kept in a memory. When the motor in reverse rotation is made to rotate forward, the dq-axis current command value that correspond to the torque command value and motor rotational speed are read out of the maps of the reverse rotation dq-axis current command values while in the reverse rotation. Then, the currents are controlled by the inverter in such a way that the dq-axis currents of the motor is equalized to the dq-axis current command values. <P>COPYRIGHT: (C)2007,JPO&INPIT |
