Method and apparatus for PWM drive

Details Method and apparatus for PWM drive Method and apparatus for PWM drive

2008-04-15

2008-04-15

Ro, Bentsu (Department: 2837)

Electricity: motive power systems

Motor-reversing

Armature or primary circuit control

C318S287000, C318S291000, C318S379000

Reexamination Certificate

active

07358696

ABSTRACT:
During PWM control in which an actuator (9) is connected between the output terminals of a bridge circuit made up of switching elements (121, 122, 221, 222) and power is applied to the actuator (9) with signals G1U, G1L, G2U and G2L, driving timing signals are generated with a time interval (dead time) during which the switching elements (121, 122) and the switching elements (221, 222) are simultaneously turned off, and the actuator (9) is driven so as to have no overlapping dead time between a pair of half-bridge circuits, achieving response even with a differential input PWM signal (S51-S52) having a small time difference.

REFERENCES:
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patent: 5428522 (1995-06-01), Millner et al.
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patent: 5801504 (1998-09-01), Endo et al.
patent: 5874847 (1999-02-01), Kim et al.
patent: 6995531 (2006-02-01), Ichimaru et al.
patent: 3-288901 (1991-12-01), None
patent: 7-117841 (1995-12-01), None

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