Constant voltage output control method and constant voltage...

Details Constant voltage output control method and constant voltage... Constant voltage output control method and constant voltage...

2006-04-11

2006-04-11

Patel, Rajnikant B. (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S097000, C363S021010

Reexamination Certificate

active

07027313

ABSTRACT:
The present invention provides a constant voltage output control method and a constant voltage output control device for a switching power supply circuit that allow accurate execution of a constant voltage control of an output voltage, even if there is variation in a utilized circuit element or an integrated circuit. A set voltage V2asetis obtained based on equation (1),in-line-formulae description="In-line Formulae" end="lead"?V2ASET=NP÷NS×V2BSET  (1)in-line-formulae description="In-line Formulae" end="tail"?where, V2bsetrepresents an output voltage of a secondary output winding that is subject to the constant voltage control, Np represents a number of turns of a primary winding, and Ns represents a number of turns of the secondary output winding; and the set voltage V2asetis compared with a flyback voltage V2aof the primary winding.

REFERENCES:
patent: 4646218 (1987-02-01), Scholer
patent: 5412555 (1995-05-01), Uramoto
patent: 5581453 (1996-12-01), Ueta et al.
patent: 5661642 (1997-08-01), Shimashita
patent: 5812383 (1998-09-01), Majid et al.
patent: 2002-136116 (2002-05-01), None
Patent Abstracts of Japan for JP2002-136116 published on May 10, 2002.

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