[특허]PWM power supply eliminating modulation-frequency components from ground potentials

PWM power supply eliminating modulation-frequency components from ground potentials 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02M-005/45
출원번호	US-0403467 (1989-09-06)
우선권정보	JP-0221255 (1988-09-06); JP-0016174 (1989-01-27)
발명자 / 주소	Higaki Shigetoshi (Tokyo JPX) Hata Yoshitaka (Kawasaki JPX)
출원인 / 주소	Kabushiki Kaisha Toshiba (Kawasaki JPX 03)
인용정보	피인용 횟수 : 38 인용 특허 : 0

초록 ▼

In a PWM control type power supply apparatus, a modulation (high frequency) signal component is eliminated from an AC output. The PWM control type power supply apparatus includes: AC-to-DC converting means coupled to an AC (alternating current) power source capable of supplying a first AC voltage having a low frequency from a pair of output terminals, for converting the first AC voltage to obtain a positive DC (direct current) voltage from a positive half cycle of the first AC voltage appearing at one output terminal and a negative DC voltage from a negative half cycle of the first AC voltage appearing at one output terminal with a common voltage appearing at the other output terminal; and, DC-to-AC inverter means including a pair of first and second switching elements, and a PWM (pulse width modulation) controller for controlling switching operations of the first and second switching elements in a PWM control mode so as to invert the positive and negative DC voltage into a second AC voltage having a modulation frequency higher than the low frequency with respect to the common voltage output terminal, whereby the second AC voltage contains no modulation frequency component.

대표청구항 ▼

A power supply apparatus comprising: chopper means, coupled to an AC (alternating current) power source capable of supplying a first AC voltage having a low frequency from a pair of output terminals, for chopping said first AC voltage by switching first and second chopper switching elements to obtain a positive DC (direct current) voltage from a positive half cycle of said first AC voltage appearing at one output terminal of said output terminals and a negative DC voltage from a negative half cycle of said first AC voltage appearing at said one output terminal with a common voltage appearing at another output terminal of said output terminals which is a common voltage output terminal; and DC-to-AC inverter means including a pair of third and fourth inverter switching elements and a chopper/PWM (pulse width modulation) controller for controlling chopper operations of said first and second chopper switching elements so as to obtain corresponding voltages to said positive and negative DC voltages and also for controlling switching operations of said third and fourth inverter switching elements in a PWM control mode so as to invert said positive and negative DC voltages into a second AC voltage having a modulation frequency higher than said low frequency with respect to said common voltage output terminal, whereby said second AC voltage contains no modulation frequency component.

이 특허를 인용한 특허 (38)

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Reilly, David E.; Landsman, Emanuel E.; Curtis, Jeffrey, Method and apparatus for converting a DC voltage to an AC voltage.
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Masciarelli,Francis J.; Mutabdzija,Srdan; Demissie,Eyob; Ingemi,Michael J.; Charlantini,Donald Lee, Methods and apparatus for providing uninterruptible power.
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Briggs, James; Schuttler, David; Mutabdzija, Srdan; Falcinelli, Michael, Modular UPS.
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Briggs, James; Schuttler, David; Mutabdzija, Srdan; Falcinelli, Michael, Modular UPS.
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Burke,Kevin D.; Rasmussen,Eric G., PWM switching power supply control methods.
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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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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
메일정보	받는사람 (필수) @ 보내는사람 (선택) @ 제목 내용 KISTI 검색결과 이메일 서비스
안내	총 건의 자료가 검색되었습니다. 다운받으실 자료의 인덱스를 입력하세요. (1-10,000) 검색결과의 순서대로 최대 10,000건 까지 다운로드가 가능합니다. 데이타가 많을 경우 속도가 느려질 수 있습니다.(최대 2~3분 소요) 다운로드 파일은 UTF-8 형태로 저장됩니다. 파일의 내용이 제대로 보이지 않을실 때는 웹브라우저 상단의 보기 -> 인코딩 -> 자동선택 여부를 확인하십시오. ~ Text(ASCII format) Excel format

연합인증

PWM power supply eliminating modulation-frequency components from ground potentials 원문보기

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PWM power supply eliminating modulation-frequency components from ground potentials 원문보기

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이 특허를 인용한 특허 (38)

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