| 摘要 |
The method involves establishing an initial stator-field speed and setting a counter of synchronization. A rotor speed is compared with the stator field speed to determine if the rotor is synchronized with the field. On non-synchronization the counter is resetted and a motor current acceleration is increased. The commutation is performed based on an open loop timer and the steps are repeated until the rotor is synchronized. The determination of the rotor and stator field synchronization involves the steps of incrementing the counter of synchronization and determining if the counter is greater than a certain value. The open loop commutation is switched to closed loop commutation, if the counter is greater than the certain value. The steps from the increase of the acceleration portion of the motor current are repeated, if the counter is not greater than the certain value. |
