Converter circuit for generating direct current with selectable

Details Converter circuit for generating direct current with selectable Converter circuit for generating direct current with selectable

1995-06-06

1997-01-21

Nguyen, Matthew V.

Electric power conversion systems

Current conversion

With means to selectively provide d.c. of either polarity

H02M 702

Patent

active

055964907

ABSTRACT:
A two- or three-phase input transformer (1) feeds a conventional six-diode full-wave bridge rectifier (3) whose output terminals (4, 5) are connected through capacitors (6, 7) to the star point (2) of the second side (1b) of the transformer, and through controlled switches (9, 10) to a midpoint (8). A DC motor (11) connected between the star point and midpoint is coupled to a tachogenerator (12) which supplies a signal to the control circuit (13) operating the controlled switches, which preferably are modified MOSFETs with temperature-compensated reference voltage.

REFERENCES:
patent: 4671390 (1987-06-01), Stanyard et al.
patent: 4737897 (1988-04-01), Shipley et al.
patent: 4740878 (1988-04-01), Carter et al.
patent: 4835652 (1989-05-01), Billings et al.
patent: 5317254 (1994-05-01), Olson
W. Chater, "MOSFETs provide low-loss rectification", EDN-Electrical Design News, Feb. 18, 1988, No. 4. pp. 237,239.

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