| 摘要 |
PURPOSE:To efficiently rotate a motor by setting a conduction angle of the motor to each coil, after the motor is started and arrived at a predetermined rotating speed, to a zone narrower than a normal conducting zone with the central position of the normal conducting zone as a center. CONSTITUTION:A conduction angle alpha to coils is set to a zone narrower than a normal conducting zone beta with the central position Mc of the normal conducting zone beta as a center. A signal from a position detector 1 or a stator coil is fed through a phase shifter 2, a reference voltage is applied to the phase- shifted input signal, and conducted in a zone more than the voltage. When the level of the reference voltage is altered, the angle n can be altered. The level of the reference voltage can be varied by changing the resistance value of a variable resistor 4. |
