| 摘要 |
PURPOSE:To detect a commutation margin angle irrespective of the normal and reverse rotations of a motor by considering a digital signal corresponding to the rotating direction of a motor when a logic calculation is executed. CONSTITUTION:A digital signal in response to a motor current, a digital signal responding to a voltage between motor lines for inducing a synchronous motor and a digital signal in response to the set control leading angle for deciding the commutating period are logically calculated to obtain a digital signal corresponding to the commutation margin angle. When the logic calculation is executed, a digital signal corresponding to the rotating direction of the motor is considered. |
