[특허]Power converter with controller for switching between primary and battery power sources

Power converter with controller for switching between primary and battery power sources 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02J-007/00
출원번호	US-0896250 (1992-06-10)
발명자 / 주소	Gregorich James M. (Merrimack NH) Daly James A. (Chelsea MA) Brand Gerald J. (Derry NH)
출원인 / 주소	Digital Equipment Corporation (Maynard MA 02)
인용정보	피인용 횟수 : 52 인용 특허 : 0

초록 ▼

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.

대표청구항 ▼

In a power supply, an apparatus for controlling the selection of a primary power source or a battery power source for powering a load, said apparatus comprising: means having an input connected to receive AC voltage from said primary power source for rectifying said AC voltage; first switch means for alternately connecting or disconnecting said rectifying means from an input of a boost power factor correction means in response to a first switch control signal, said boost power factor correction means for adjusting the power factor of a voltage received at its input in response to a boost control signal and producing at an output a regulated DC voltage; a battery power source comprising one or more batteries; second switch means for alternately connecting or disconnecting said battery power source from said boost power factor correction means in response to a second switch control signal; and control means, coupled to the first and second switch means and the boost power factor correction means, for comparing the magnitude of said regulated DC voltage to a first preselected reference and generating an output error signal indicative of the difference therebetween, for comparing the magnitude of the AC voltage from the primary power source to a second preselected reference and generating an input error signal indicative of the difference therebetween and for generating the first and second switch control signals in response to said error signals, whereby either said rectifying means or said battery power source is connected to said boost power factor correction means, and for generating said boost control signal.

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Power converter with controller for switching between primary and battery power sources 원문보기

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Power converter with controller for switching between primary and battery power sources 원문보기

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