Method for switching low-power using AC and system for...

Electricity: power supply or regulation systems – For phase shift or control – Using transformer

Reexamination Certificate

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C323S217000

Reexamination Certificate

active

07898224

ABSTRACT:
A power control method using AC power, the method being capable of performing: low power control that passes only two portions of positive direction waves of each one-cycle sine wave of the AC power and only two portions of negative direction waves of each one-cycle sine wave of the AC power, which have voltage levels lower than a set reference voltage level, through a system; and high power control that does not pass only two portions of positive direction waves of each one-cycle sine wave of the AC power and only two portions of negative direction waves of each one-cycle sine wave of the AC power, which have voltage levels lower than a set reference voltage level, through the system.

REFERENCES:
patent: 4321662 (1982-03-01), Yokoyama
patent: 4325112 (1982-04-01), Otsuka
patent: 4685046 (1987-08-01), Sanders
patent: 4787007 (1988-11-01), Matsumura et al.
patent: 5003455 (1991-03-01), Miller
patent: 5450307 (1995-09-01), Yasumura
patent: 5708577 (1998-01-01), Mckinley
patent: 2003/0043597 (2003-03-01), Betts-LaCroix
patent: 2006/0139823 (2006-06-01), Shoji et al.
patent: 05-064432 (1993-03-01), None
Muhammad H. Rashid; Power Electronic Circuits, Devices, and Applications, 2ndEdition; prentice Hall, Englewood Cliffs, NJ; 1993; Ch.5-11 (Symmetrical Angle Control), pp. 167-176.

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