[특허]Winchester disk drive motor circuitry

Winchester disk drive motor circuitry 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G11B-015/46 G11B-019/28
출원번호	US-0920143 (1992-07-24)
발명자 / 주소	Gami Bipin V. (Northridge CA) Dunstan Ericson (Port Hueneme CA)
출원인 / 주소	Micropolis Corporation (Los Angeles CA 02)
인용정보	피인용 횟수 : 33 인용 특허 : 0

초록 ▼

An improved switching regulator DC-DC power converter or power supply with a variable duty cycle is disclosed which forms part of a compact Winchester disk drive system having a storage capacity in excess of 380M bytes of information. The switching regulator is designed for frequencies in excess of 80 kilocycles per second and may therefore be construced using smaller capacitive and inductive elements. Also, very low heat dissipation and high regulator efficiency may be achieved by the improved power converter or power supply to drive a brushless D.C. motor encased within a hard disk assembly where no separate fan or cooling system is used to aid in heat removal. Circuitry is provided to control the motor speed while simultaneously limiting the motor current to a predetermined level. This is a achieved by controlling the voltage applied to the motor by suitably adjusting the duty cycle of the switching regulator. A filter is provided to ensure that the switching regulator current fluctuations are not reflected in the current drawn from the power supply. At the start when the D. C. motor E.M.F. is zero, the switching regulator causes significantly higher current to flow through the motor than is drawn from the power supply through a current multiplying effect. These unique features provides significant advantages in a Winchester disk drive using thin film media whose overcoming high level of initial stiction-friction forces between the read/write heads and the recording media is important and desirable.

대표청구항 ▼

A Winchester-type hard disk drive digital storage unit comprising: a hard disk drive assembly including a plurality of hard disks and associated magnetic heads; a brushless D.C. motor having a stator and a rotor coupled to said disks for rotating said disks; a power supply having a predetermined output voltage and a limited output current for providing power to said disk drive unit; a switching type regulator connected to said power supply for supplying power to said brushless D.C. motor; means for operating said switching type regulator at a frequency in excess of 80 [hertz]kilohertz; and the input to said switching regulator from said power supply constituting circuit means including a series connected coil and a shunt capacitor, for supplying power from said capacitor to said switching regulator when said switching regulator is switched to its conducting state; whereby the maximum possible power is supplied to said motor during start-up, consistent with the maximum current limitations of said power supply; and heat dissipation requirements for said unit are minimized.

이 특허를 인용한 특허 (33)

Rowan Bryan Scott, Adaptive pulse width modulated motor control.
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Karwath, Arno, Arrangement for supplying a user, especially a D.C motor, that consumes power in a non-continuous manner from a D.C. system.
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Kawabata, Toru, Brushless motor apparatus.
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Jalbout, Bassam D.; Wong, Brian, Control of light intensity using pulses of a fixed duration and frequency.
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Yamashita, Masaki; Asaoka, Chisako; Wasa, Nobuhiko, Disk drive.
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Kamo, Yoshihisa; Kakuta, Hitoshi; Tanaka, Atsushi; Seo, Yosuke, Disk system and power-on sequence for the same.
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Kamo,Yoshihisa; Kakuta,Hitoshi; Tanaka,Atsushi; Seo,Yosuke, Disk system and power-on sequence for the same.
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Yoshihisa Kamo JP; Hitoshi Kakuta JP; Atsushi Tanaka JP; Tosuke Seo JP, Disk system and power-on sequence for the same.
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Kamo Yoshihisa,JPX ; Kakuta Hitoshi,JPX ; Tanaka Atsushi,JPX ; Seo Yosuke,JPX, Disk system with activation control of disk drive motors.
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Jackson,Robert D., Enhanced system and method for controlling discharge of electric energy from machines.
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Iwai, Hiroshi; Suzuki, Takeshi; Tsuyuguchi, Hiroshi, Magnetic disk apparatus.
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Schreck,Erhard; Heimbaugh,Mark, Method and apparatus for providing a user selectable start-up current in a disk drive.
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Berroth,Hansj철rg, Method for commutating an electronically commutated motor and motor for carrying out said method.
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Jalbout, Bassam D.; Wong, Brian, Methods and systems for controlling electrical power to DC loads.
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Hill, Christopher L.; Korbel, Garry E., Power supply output control apparatus and method.
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Summer, Steven E., Radiation hardened motor drive stage.
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Yamashita, Masaki; Ota, Chisako, Reaction control charge pump, capacitor, and transistor to power lead.
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Kadlec, Ron J., Servo processor receiving photodetector signals.
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Kadlec, Ron J., Servo processor receiving photodetector signals.
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Kadlec, Ron J., Servo processor receiving photodetector signals.
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Kadlec, Ron J., Servo processor receiving photodetector signals.
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Kim Gee-bong,KPX, Sled motor sliding prevention circuit.
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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

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Winchester disk drive motor circuitry 원문보기

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Winchester disk drive motor circuitry 원문보기

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이 특허를 인용한 특허 (33)

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