Motor control circuit for supplying a controllable driving...

Details Motor control circuit for supplying a controllable driving... Motor control circuit for supplying a controllable driving...

2006-07-04

2006-07-04

Gray, David M. (Department: 2838)

Electric power conversion systems

Current conversion

Using semiconductor-type converter

C318S434000

Reexamination Certificate

active

07072199

ABSTRACT:
For applying a driving voltage to a motor, an H-bridge circuit is constructed by a first and a second linear unit and a first and a second switching unit. An error amplifier generates an error signal representative of a difference between the driving voltage detected by a voltage detecting circuit and a command voltage signal. A state control circuit synchronously controls the first and second switching units and a feedback circuit. Through the feedback circuit, the error signal is selectively applied to the first or second linear unit such that one is operated in a linear mode and the other is operated in a nonconductive mode, thereby controlling the driving voltage to become proportional to the command voltage signal. The state control circuit further controls a brake circuit for transforming the error signal into a brake signal to operate the first and second linear units simultaneously in a conductive mode.

REFERENCES:
patent: 5237254 (1993-08-01), Guerin
patent: 5343382 (1994-08-01), Hale et al.
patent: 5631527 (1997-05-01), Canclini
patent: 5744922 (1998-04-01), Neary et al.
patent: 6204729 (2001-03-01), Takita
patent: 6229273 (2001-05-01), Kelly et al.
patent: 6384556 (2002-05-01), Mizumoto et al.
patent: 6518723 (2003-02-01), Oku

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