DC brushless motor of the drive unit and a DC brushless motor

摘要

PURPOSE:To provide a driving equipment that will prevent reverse current from flowing to the power supply side without smoothing or rectifying motor driving current subjected to high-frequency switching, require no additional choke coil, capacitor or diode, and make possible its downsizing, stabilization and cost reduction CONSTITUTION:A switching circuit includes MOSFET as a switching element for driving coil energization, and a high ripple current type capacitor is placed between a driving power supply 52 for a driving coil 51 and an earth 54. A coil board is integrally placed in a motor housing through wiring.