| 摘要 |
PURPOSE:To drive a motor efficiently with high load torque at a high speed by holding an induced voltage containing a commutation spike for the prescribed time duration to set a signal for driving the motor. CONSTITUTION:An induced voltage from the neutral point N of an armature winding by driving a motor 2 is divided by resistors R1, R2, and applied to a gate circuit 4. When a gate signal set in advance equal to the maximum commutation spike continuing time within load condition used for the motor 2 synchronously with the commutation spike or to corresponding time duration is applied from a gate signal generator 5, an induced voltage signal is applied through a gate circuit 4 and an impedance converter of a capacitor C1 and an operational amplifier OP1 to become a sample holding signal to a controller 3. The controller 3 controls a semiconductor commutator 1. |
