| 摘要 |
PURPOSE:To improve the efficiency of a motor by obstructing the conduction of field currents to a stator coil at the time of low torque conversion efficiency. CONSTITUTION:Two stator coils 16 are connected in series, circuits through transistors as armature current control elements 25 are fitted in parallel, and output terminals for a Hall IC 22 as a magnetoelectric device 21 are connected to bases in each control transistor. When base bias resistors 26 for the control transistors are determined properly and an output from the Hall IC 22 takes voltage such as 3V and the control transistors are conducted, the control transistors are conducted with the exception of predetermined angles before and behind the dead center of torque, and armature currents can be changed into pulsating currents, thus reducing the power consumption of a motor. |
