Fine-tuning circuit for the winding voltage of a transformer

Details Fine-tuning circuit for the winding voltage of a transformer Fine-tuning circuit for the winding voltage of a transformer

2007-06-05

2007-06-05

Vu, Bao Q. (Department: 2838)

Electric power conversion systems

Current conversion

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

C363S056010, C363S097000

Reexamination Certificate

active

11433442

ABSTRACT:
A fine-turning circuit is used for adjusting the output voltage of a main transformer in an electrical power convert device and solving the problem of turns granularity of conventional transformers. The fine-turning circuit includes an auxiliary transformer having a primary coil and a secondary coil, and a voltage level clamper connected with the secondary coil of the auxiliary transformer via a diode. The primary coil of the auxiliary transformer is connected with the renovated winding in serial. When a current flows through the renovated winding, the secondary coil of the auxiliary transformer reacts to an amended voltage so as to amend the output voltage of the main transformer. The amended voltage is adjusted via changing the turn ratio of the primary coil to the secondary coil of the auxiliary transformer.

REFERENCES:
patent: 5898581 (1999-04-01), Liu
patent: 5917715 (1999-06-01), Lee
patent: 5936853 (1999-08-01), Mweene
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patent: 6005782 (1999-12-01), Jain et al.
patent: 6348848 (2002-02-01), Herbert
patent: 6466462 (2002-10-01), Nishiyama et al.
patent: 6735094 (2004-05-01), Steigerwald et al.
patent: 6992902 (2006-01-01), Jang et al.

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