Brushless direct current monophase motor drive circuit

Details Brushless direct current monophase motor drive circuit Brushless direct current monophase motor drive circuit

2005-08-23

2005-08-23

Martin, David (Department: 2837)

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

C318S254100, C318S434000, C318S720000

Reexamination Certificate

active

06933688

ABSTRACT:
A brushless direct current motor drive circuit having a serially connected motor coil energizing circuit, a serially connected feedback circuit, a pre-drive circuit, a position sensor, and a duty ratio controller. This circuit can decrease the heat generation from the switching elements on the power source side, perform absorption of the current flowing back in the direction of the switching elements on the power source side when the duty ratio is set to less than 100% without using an electrolytic capacitor group that causes a shortening of the motor lifetime, and solve various problems caused by the use of an electrolytic capacitor group.

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patent: 6185118 (2001-02-01), Sander et al.
patent: 6664750 (2003-12-01), Pelonis
patent: 6713979 (2004-03-01), Naito et al.
patent: 2001037276 (2001-02-01), None

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