[특허]Method and apparatus for passive input current waveform correction for universal offline switchmode power supply

Method and apparatus for passive input current waveform correction for universal offline switchmode power supply 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02J-003/01
출원번호	US-0503782 (1995-07-18)
발명자 / 주소	Brown Alan E. (Georgetown TX)
출원인 / 주소	Dell USA L.P. (Austin TX 02)
인용정보	피인용 횟수 : 22 인용 특허 : 0

초록 ▼

A universal offline switch mode power supply including an input stage having an input filter inductor and a switch for switching between a first lower AC input voltage or a second higher AC input voltage. A bridge rectifier full-wave rectifies the higher AC voltage when the switch is in a first position, where the filter inductor serves to filter the higher AC voltage. The higher AC voltage is preferably approximately 230 V rms. The bridge rectifier and two bulk capacitors serve to double the lower AC voltage when the switch is in a second position, where the lower AC voltage is preferably approximately 115 V rms. Also, the input filter is bypassed for the lower AC voltage. The switch is preferably an SPST switch. In the preferred embodiment, the inductor is placed between one AC input line and one input of a bridge rectifier circuit. The outputs of the bridge rectifier circuit are placed across two series input bulk capacitors and to the input of a switchmode power converter. The switch is placed between the same AC input line coupled to the inductor and the junction between the bulk capacitors. When the switch is in its closed position, the filter inductor is effectively bypassed and the diodes of the bridge rectifier circuit and the bulk capacitors serve as a voltage doubler for 115 V rms operation. With the switch is in its open position, the filter inductor performs filtering for the 230 V rms operation and the bridge rectifier circuit full-wave rectifies the AC input voltage.

대표청구항 ▼

An input stage for a universal offline switchmode power supply for receiving and converting either a first lower AC input voltage or a second higher AC input voltage across first and second output terminals of an AC source, comprising: a bridge rectifier having first and second input terminals and first and second output terminals, wherein said first input terminal is for coupling to the first output terminal of the AC source; first and second capacitors having one end each coupled together forming a center junction and having their other ends coupled to said first and second output terminals of said bridge rectifier, respectively; a filter inductor having a first end coupled to said second input terminal of said bridge rectifier and a second end for coupling to the second output terminal of the AC source; and a switch having a first terminal coupled to said second end of said input filter inductor and a second terminal coupled to said center junction of said first and second capacitors.

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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연합인증

Method and apparatus for passive input current waveform correction for universal offline switchmode power supply 원문보기

초록 ▼

대표청구항 ▼

연구과제 타임라인

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Method and apparatus for passive input current waveform correction for universal offline switchmode power supply 원문보기

초록 ▼

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연구과제 타임라인

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이 특허를 인용한 특허 (22)

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