Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2008-07-22
2008-07-22
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S400140, C318S400270
Reexamination Certificate
active
07402969
ABSTRACT:
A method produces PWM voltage waveforms in a PWM motor controller of a three phase PM DC brushless motor, wherein the motor controller has first, second and third half H-bridge transistor pairs to generate the voltage waveforms to electronically commutate the motor. The first transistor pair is always assigned to the first phase for every commutation state requiring a voltage waveform from the first transistor pair. The second and third transistor pair are similarly assigned. The first method also includes always starting a voltage waveform generated by the first transistor pair substantially at the beginning of the PWM period when a commutation state requires a voltage waveform from the first transistor pair but delaying starting a voltage waveform generated by the second transistor pair by substantially ⅓ of the PWM period and delaying starting a voltage waveform generated by the third transistor pair by substantially ⅔ of the PWM period.
REFERENCES:
patent: 3783359 (1974-01-01), Malkiel
patent: 4511827 (1985-04-01), Morinaga et al.
patent: 4514667 (1985-04-01), Sakmann et al.
patent: 5041768 (1991-08-01), Herrmann
patent: 5168202 (1992-12-01), Bradshaw et al.
patent: 5200675 (1993-04-01), Woo
patent: 5373436 (1994-12-01), Yamaguchi et al.
patent: 5764020 (1998-06-01), Maiocchi
patent: 6014004 (2000-01-01), Hamaoka et al.
patent: 6262544 (2001-07-01), Disser et al.
patent: 6384553 (2002-05-01), Liu
patent: 6424798 (2002-07-01), Kitamine
patent: 6534938 (2003-03-01), Wu et al.
patent: 6577087 (2003-06-01), Su
patent: 6580236 (2003-06-01), Mitsuda
patent: 6605912 (2003-08-01), Bharadwaj et al.
patent: 6771035 (2004-08-01), Heidrich
patent: 6775164 (2004-08-01), Wong et al.
patent: 6809484 (2004-10-01), Makaran et al.
patent: 2002/0027423 (2002-03-01), White
patent: 2004/0108789 (2004-06-01), Marshall
Crabill Monty L.
Disser Robert J.
Delphi Technologies INC
McBain Scott A.
Ro Bentsu
LandOfFree
Method for producing voltage waveforms in a PWM motor... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for producing voltage waveforms in a PWM motor..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for producing voltage waveforms in a PWM motor... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2806028