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특허 상세정보

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Direct current motor speed control

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G05B-005/00   
미국특허분류(USC) 388/817 ; 388/812 ; 388/823 ; 388/901
출원번호 US-0047181 (1987-05-06)
발명자 / 주소
출원인 / 주소
인용정보 피인용 횟수 : 106  인용 특허 : 18
초록
▼

The motor speed control circuit senses average back EMF as a measure of motor speed. The back EMF charges a capacitor circuit which accumulates charge and develops a voltage indicative of the motor speed. A sample and hold circuit may be used to sample the back EMF when the motor is switched off during each cycle. This voltage is compared with a reference voltage indicative of the desired motor speed. An error signal is generated by comparing the desired speed with the actual speed and this error signal is used to generate a variable duty cycle pulse tra...

대표
청구항
▼

A DC motor speed control circuit comprising: a DC motor inducing a back EMF; a sample and hold means coupled to said motor for developing a signal having a 1-crelationship to the back EMF of said motor where is c

이 특허에 인용된 특허 (18)

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  2. Zeitvogel Heinrich (Gaimersheim DEX). Circuit arrangement for regulating the rpm of a series motor. USP1988034730149.
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  6. Kinoshita Hisashi (Katano JPX) Yoshitake Hideki (Toyonaka JPX) Kake Nin (Takarazuka JPX). Control system for DC motors. USP1985064523134.
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  13. Suzuki Hitoshi (Nara JPX) Makino Fusao (Nara JPX). Motor speed control circuit. USP1983114418298.
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  15. Morton ; John ; Stevens ; Keith Drummond. Pulse controllers. USP1978104119898.
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  17. Tsukihashi Akira (Oora JPX). Speed control apparatus for direct current motor. USP1984014427931.
  18. Shinohara Shigeru (Katsuta JPX) Suzuki Shun (Katsuta JPX). Variable duty ratio speed controller for DC motors. USP1989024803410.

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