Prevention of concurrent PWM or PSM commutations of power...

Details Prevention of concurrent PWM or PSM commutations of power... Prevention of concurrent PWM or PSM commutations of power...

2007-06-08

2011-10-25

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Synchronous motor systems

Brushless motor closed-loop control

C318S400140, C318S400190, C318S400200

Reexamination Certificate

active

08044619

ABSTRACT:
A method of preventing concurrent or quasi-concurrent commutations of a pair of phase shift modulation (PSM) drive signals of an output bridge stage driving an electrical load includes establishing a threshold level of a programmed current level to be transmitted though the electrical load. The method also includes, if the programmed current level is lower than the threshold level, enhancing a time offset between commutation edges of the pair of PSM drive signals by a minimum time.

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patent: 6995537 (2006-02-01), Plutowski et al.
patent: 2001/0054874 (2001-12-01), Oku
patent: 0660495 (1995-06-01), None
patent: 0760552 (1997-03-01), None
patent: 1137162 (2001-09-01), None

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