Harmonic current attenuating apparatus of a motor for a vacuum cleaner

摘要

A slide switch (34) is used to select a phase-controlling mode or a full power mode. A switching unit (21) such as a triac or microswitch (22) supplies AC power from a power supply unit (10) through a harmonic transformer (20) to a motor (30) when the phase-controlling mode is selected. The switching unit supplies AC power directly to the motor when the full power mode is selected