PWM driving apparatus

Details PWM driving apparatus PWM driving apparatus

2006-07-18

2006-07-18

Ip, Paul (Department: 2837)

Electricity: motor control systems

Closed loop speed control system for dc motor with commutator

Field control, or field and armature control, by analog...

C318S599000, C363S041000

Reexamination Certificate

active

07079758

ABSTRACT:
When a PWM signal generating unit (10) sets a duty D of a PWM signal based on command signals (10c), the PWM signal generating unit (10) sets a phase difference φ between each of the PWM signals based on a relation formula of φ (degree)=360 (degree)×D (%)/100 (%), and generates and outputs first PWM signals (10a) and second PWM signals (10b) in which the duty is D (%) and the phase difference is φ (degree). The first PWM signals (10a) and the second PWM signals (10b) are respectively supplied to a first load driving circuit (21) and a second load driving circuit (22) to operate a first motor fan (3) and a second motor fan (4) by a PWM control, respectively.

REFERENCES:
patent: 3978424 (1976-08-01), Hobo et al.
patent: 4802077 (1989-01-01), Fujii et al.
patent: 5231314 (1993-07-01), Andrews
patent: 5627441 (1997-05-01), Sakurai et al.
patent: 6088246 (2000-07-01), Okuyama et al.
patent: 6388416 (2002-05-01), Nakatani et al.
patent: 6704212 (2004-03-01), Furukawa et al.
patent: 6775158 (2004-08-01), Fu
patent: 6891342 (2005-05-01), Nakamura et al.
patent: 2002/0047533 (2002-04-01), Fushimi et al.
patent: 2004/0027105 (2004-02-01), Nakamura et al.
patent: 2 792 159 (2000-10-01), None
patent: 2 809 924 (2001-12-01), None
patent: 2002-043910 (2002-02-01), None
patent: 2002-315392 (2002-10-01), None

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