$\require{mediawiki-texvc}$
  • 검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
  • 검색연산자
검색연산자 기능 검색시 예
() 우선순위가 가장 높은 연산자 예1) (나노 (기계 | machine))
공백 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 예1) (나노 기계)
예2) 나노 장영실
| 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 예1) (줄기세포 | 면역)
예2) 줄기세포 | 장영실
! NOT 이후에 있는 검색어가 포함된 문서는 제외 예1) (황금 !백금)
예2) !image
* 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 예) semi*
"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"
쳇봇 이모티콘
안녕하세요!
ScienceON 챗봇입니다.
궁금한 것은 저에게 물어봐주세요.

특허 상세정보

Method and circuit configuration for detecting the rotational speed of electronically commutated fans

국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) G06F-015/332    H02K-023/64    H02P-006/06    H02P-005/16   
미국특허분류(USC) 318/254 ; 318/245 ; 318/434 ; 318/599
출원번호 US-0642331 (2000-08-21)
우선권정보 DE9807253 (1998-02-20)
발명자 / 주소
출원인 / 주소
대리인 / 주소
    Lerner
인용정보 피인용 횟수 : 8  인용 특허 : 16
초록

A method and a circuit configuration for detecting the rotational speed of electronically commutated fans include measuring maximum current gradients of current fluctuations caused by the fan on its power supply lines, and adapting an amplification range and switching threshold of a comparator used as an input stage for a pulse former.

대표
청구항

[ I claim:] [1.]1. A method for detecting the rotational speed of electronically commutated fans, which comprises:indicating a rotational speed of an electronically commutated fan with a clock signal having a corresponding number of clock pulses per unit time;forming the clock pulses of the clock signal with a pulse former having a comparator serving as an input stage;measuring maximum current gradients of current fluctuations caused by the fan on power supply lines of the fan as a function of the rotational speed; andautomatically adapting an amplificat...

이 특허에 인용된 특허 (16)

  1. Chin Shu-Yuan,TWX. Brushless DC fan driver with an integral overall protection capability. USP2000026023139.
  2. Jones Steven C. ; Wolford Keith. Brushless DC motor assembly control circuit. USP1999126008603.
  3. Doemen Benno (St. Georgen DEX). Circuit arrangement for generating a measurement signal associated with the frequency of an alternating current signal. USP1989044823060.
  4. Doemen Benno (St. Georgen DEX). Circuit arrangement for generating a measurement signal associated with the frequency of an alternating current signal. USP1990054928045.
  5. Saur Roland (Stuttgart DEX) Schaper Rolf (Ditzingen DEX). Cooling device for an internal combustion engine and method for controlling such a cooling device. USP1990094955431.
  6. Mykytiuk Basil G. ; Rabinovitz Josef. Fan pulse alarm using two stage comparator for speed detection. USP1999035889469.
  7. Franklin Michael R. (Travis County TX). Instrumentation system with combined voltage and current source. USP1997085654654.
  8. Adam Jurgen,DEX ; Busch Peter,DEX. Method and circuit arrangement for controlling fans. USP1998035731671.
  9. Gontowski ; Jr. Walter S.. Motor control with clamped filter output. USP1999015862301.
  10. Sakai Masayoshi,JPX ; Shirai Toshihito,JPX ; Anzai Hiroji,JPX ; Futsuhara Koichi,JPX. Motor stopped verification apparatus. USP1998025717302.
  11. Wilkerson Alan W. (410 Madero Dr. Thiensville WI 53092). Motor torque control with improved linearity. USP1984104475070.
  12. Pecone Victor K. (Austin TX). Sensor for monitoring fan operation in a PC or PC based system. USP1995095448143.
  13. Landseadel Bradley A. (Hoffman Estates IL). Servo amplifier. USP1992105153492.
  14. Kim Yong-ho,KRX ; Lee Young-sik,KRX. System for controlling automobile cooling fan. USP1998025718373.
  15. Hadley Maxwell R. (Lindhurst GBX) Dudley Richard P. (Southampton GBX). Tacho signal processing. USP1990054924420.
  16. Zavis Wayne (Randallstown MD) Saar David A. (Timonium MD). Universal electric motor speed sensing by using Fourier transform method. USP1985074527101.