PWM controlled motor drive

Details PWM controlled motor drive PWM controlled motor drive

2005-11-29

2005-11-29

Martin, David (Department: 2837)

Electricity: motive power systems

Limitation of motor load, current, torque or force

C318S254100, C318S132000, C318S801000, C318S803000, C318S804000, C318S805000, C318S806000, C318S807000, C318S808000, C318S809000, C318S810000, C318S811000, C318S599000

Reexamination Certificate

active

06969963

ABSTRACT:
The motor driver having a plurality of output circuits each having two switching elements connected in series includes: a phase switch circuit for putting a switching element on one side of one output circuit among the plurality of output circuits in the ON state during a time period corresponding to a predetermined electrical angle, and performing switching operation for switching elements on the other side of plural output circuits among the remaining output circuits; and a conduction period control section. The conduction period control section generates a signal for controlling the switching operation. Specifically, when the number of times of switching operation performed during the time period corresponding to the predetermined electrical angle is equal to or less than a predetermined value, a switching element corresponding to a phase, for which the magnitude of the current should be decreased, is turned OFF in the time period corresponding to the next predetermined electrical angle.

REFERENCES:
patent: 5506487 (1996-04-01), Young et al.
patent: 5612599 (1997-03-01), Itami et al.
patent: 5640073 (1997-06-01), Ikeda et al.
patent: 5821708 (1998-10-01), Williams et al.
patent: 5942876 (1999-08-01), Maekawa
patent: 6380707 (2002-04-01), Rosholm et al.
patent: 6512342 (2003-01-01), Kawagoshi
patent: 6674258 (2004-01-01), Sakai et al.
patent: 6806663 (2004-10-01), Kusaka et al.
patent: 2002/0097014 (2002-07-01), Kawagoshi
patent: 2003-79182 (2003-03-01), None

Affiliated with

Also associated with

Rating

PWM controlled motor drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with PWM controlled motor drive, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PWM controlled motor drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3474391