Power converter with controller for switching between primary an

Details Power converter with controller for switching between primary an Power converter with controller for switching between primary an

1992-06-10

1994-02-22

Gaffin, Jeffrey A.

Electrical transmission or interconnection systems

Plural supply circuits or sources

Substitute or emergency source

307 64, 323207, 323285, 363 86, H02J 700

Patent

active

052890465

ABSTRACT:
A power converter, based on a modular architecture, in which a boost power factor correction circuit is provided as an input stage for both a primary power source and a battery power source. This arrangement permits the same power conversion stages which follow the boost power factor correction circuit to be used regardless of whether the primary or battery power source is in use. The power supply includes a controller for monitoring the primary power source voltage and the DC voltage produced at the output of the boost circuit and comparing each to a preselected reference. When a sufficiently large difference appears between each of those voltages and its respective reference, the controller connects the battery power source to the input of the boost circuit and simultaneously disconnects the primary power source therefrom. This switching of power sources is transparent to the load whose input voltage is maintained at a substantially constant level by the boost power factor correction circuit.

REFERENCES:
patent: 4465943 (1984-08-01), Risberg
patent: 5001620 (1991-03-01), Smith
patent: 5111058 (1992-05-01), Martin
patent: 5138184 (1992-08-01), Keefe
Joos, et al., An On-Line Ups With Improved Input-Output Characteristics, IEEE (1992) pp. 598-605.
Campos et al., Ups System Employing High Frequency PWM Techniques, IEEE (1990) pp. 414-421.

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