DC on line AC brushless motor

Details DC on line AC brushless motor DC on line AC brushless motor

1994-11-22

1997-02-25

Ip, Paul

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318439, 318800, 318254, H02P 300

Patent

active

056062320

ABSTRACT:
A phase regulated power supply is provided for converting alternating current (AC) to direct current (DC) for powering a DC brushless motor, such as a fan. The power supply includes a full wave bridge rectifier and a driver circuit, which may be an IC chip, controlled by standard commutation circuitry. An output capacitor is connected electrically downstream to the switch for supplying a reduced DC ripple voltage to the motor load. The power supply preferably includes a line filter for removing input power surges. The speed of the motor may be varied by changing the values of bias resistors used with the driver circuit.

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