Modified high-efficiency phase shift modulation method

Details Modified high-efficiency phase shift modulation method Modified high-efficiency phase shift modulation method

2007-02-06

2007-02-06

Riley, Shawn (Department: 2838)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

Reexamination Certificate

active

11095436

ABSTRACT:
Disclosed is a high-efficiency phase shift modulation method suitable for use in a traditional DC/AC single-phase full-bridge inverter. In this method, phase-shifted signal timing is used to modulate a duty cycle so that a power transistor is operated in a zero voltage switching state. As such, noises and switching loss of a switching device when turned on or off, may be reduced and thus efficiency of the inverter may be promoted. With this high-efficiency phase shift modulation method, at least the following advantages may be achieved: lower switching stresses, lower switching losses and thus increased conversion efficiency, lower electromagnetic interferences (EMIs) and no additional circuit required and thus easier realization of a controller for the inverter.

REFERENCES:
patent: 3571686 (1971-03-01), Henegar

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