| 摘要 |
When a forced commutation mode (S2) ends, a switchover to a sensorless control mode is made. The sensorless control mode (S3) immediately after the switchover to the sensorless control mode is executed with a power source current maximum value (Imax1) set at a value higher than a rated current value (Imax0) of a motor. The sensorless control mode (S3) immediately after the switchover is executed only over a predetermined period of time (for T1 seconds), and, after a lapse of the predetermined period of time, a steady sensorless control mode is executed (S4). In the steady sensorless control mode (S4), the power source current maximum value is set at a value equal to the rated current value (Imax0) of the motor. |
