Patent ID: 9705441
Date: 2017-07-11
CPC Classifications: H02P

Claim:
1. A circuit for a motor comprising a rotor and a stator, the circuit comprising: phase windings divided at least approximately in half to receive alternating current (AC) line voltage; a direct current (DC) power supply at least approximately at a midpoint of the phase windings to receive AC power from the phase windings and convert the AC power to DC power; a power switch circuit comprising at least one power switch at least approximately at the midpoint of the phase windings to receive AC power from the phase windings; a control circuit to turn off the power switch circuit when the rotor is in an identified rotor position, rotor magnet polarity, or speed relative to the AC line voltage; and at least one non-collapsing DC power supply component connected to the DC power supply to prevent the DC power supply from collapsing when the at least one power switch is on and conducting during at least a portion of an AC cycle.