Motor driving circuit for adjusting speed of a motor by...

Details Motor driving circuit for adjusting speed of a motor by... Motor driving circuit for adjusting speed of a motor by...

2008-10-20

2011-11-22

Benson, Walter (Department: 2837)

Electricity: motive power systems

Armature circuit control

Voltage control

C318S494000, C361S090000, C388S825000, C388S830000, C388S833000

Reexamination Certificate

active

08063601

ABSTRACT:
A motor driving circuit for adjusting speed of the motor by changing output voltage is disclosed. One end of the motor is coupled to a variable voltage source. The motor driving circuit includes a motor-driving unit, a control unit and a determining unit. The motor-driving unit includes a first end coupled to another end of the motor, a second end coupled to a ground and a third end, and is utilized for driving the motor. The control unit is utilized for controlling the voltage between the first end and the third end of the motor-driving unit. The determining unit is coupled between the variable voltage source and the control unit, and is utilized for controlling the control unit to adjust the voltage between the first end and the third end of the motor-driving unit according to magnitude of the voltage of the variable voltage source.

REFERENCES:
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patent: 6055359 (2000-04-01), Gillett
patent: 2004/0174131 (2004-09-01), Sivertsen
patent: 2004/0217730 (2004-11-01), Horng et al.
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patent: 2006/0127066 (2006-06-01), Chiu et al.
patent: 2008/0002953 (2008-01-01), Vogt et al.
patent: 2559166 (2003-07-01), None

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