KR960032389A - Low speed control device of capstan servo motor - Google Patents

Low speed control device of capstan servo motor Download PDF

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Publication number
KR960032389A
KR960032389A KR1019950002241A KR19950002241A KR960032389A KR 960032389 A KR960032389 A KR 960032389A KR 1019950002241 A KR1019950002241 A KR 1019950002241A KR 19950002241 A KR19950002241 A KR 19950002241A KR 960032389 A KR960032389 A KR 960032389A
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KR
South Korea
Prior art keywords
memory
signal
low speed
speed control
sampling
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Application number
KR1019950002241A
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Korean (ko)
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KR0185917B1 (en
Inventor
김정태
Original Assignee
김광호
삼성전자 주식회사
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Priority to KR1019950002241A priority Critical patent/KR0185917B1/en
Publication of KR960032389A publication Critical patent/KR960032389A/en
Application granted granted Critical
Publication of KR0185917B1 publication Critical patent/KR0185917B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/46—Controlling, regulating, or indicating speed
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/02—Control of operating function, e.g. switching from recording to reproducing
    • G11B15/026—Control of operating function, e.g. switching from recording to reproducing by using processor, e.g. microcomputer
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
    • G11B15/26—Driving record carriers by members acting directly or indirectly thereon
    • G11B15/28—Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal

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  • Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

본 발명은 비데오카세트테이프(VCR)의 캡스턴 서보 시스텝에 관한 것으로, 특히 캡스턴 모터의 회전속도를 검출하기 위한 주파수발생기(FG;Freauency Generator)의 출력신호를 이용하여 모터의 저속제어를 하는 캡스턴 서보모터의 저속제어장치에 관한 것이다. 기구적인 FG발생기의 추가 없이 A/D변환기 및 메모리를 이용하여 이전 주기의 FG값과 현재 인가받는 FG신호의 한 주기내의 샘플링값을 비교하여 그 비교결과 일치하는 지점에서 가상 FG신호를 형성시킴으로써 속도검출정보를 기구적인 추가없이 회로적으로 향상시켜 캡스턴 서보모터의 저속제어성능을 높이는 잇점을 제공한다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capstan servo system for a video cassette tape (VCR), and more particularly to a capstan servo for low speed control of a motor using an output signal of a frequency generator (FG) for detecting a rotation speed of a capstan motor. It relates to a low speed control device of a motor. By using the A / D converter and memory without the addition of a mechanical FG generator, the FG value of the previous period and the sampling value within one period of the currently applied FG signal are compared and the virtual FG signal is formed at the point where the comparison results. It improves the low speed control performance of the capstan servo motor by improving the detection information in a circuit without mechanical addition.

Description

켑스턴 서보모터의 저속제어장치Low speed control device of C-Ston servo motor

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 종래의 캡스턴 서보시스템을 나타내는 구성도,1 is a block diagram showing a conventional capstan servo system,

제4도는 본 발명의 바람직한 일 시시예에 따라 캡스턴 서보모터의 저속 제어장치를 나타내는 구성도,4 is a block diagram showing a low speed control device of a capstan servomotor according to a preferred embodiment of the present invention;

제5도는 제4도의 각 구성의 출력파형도.5 is an output waveform diagram of each component of FIG.

Claims (6)

모터의 회전속도에 비례하는 주파수(FG)신호를 발생하는 주파수발생기를 포함하는 캡스턴 서보시스템에 있어서, 정현파 형태의 FG신호를 일정 샘플링 간격으로 샘플링하여 출력하는 A/D변환부; 제어부의 제어하에 인접한 두 주기내의 샘플링값을 저장하거나 독출하기 위한 메모리; 상기 정현파의 현재 주기내의 샘플링값을 상기 메모리에 저장시킴과 동시에 상기 메모리로부터 이전 주기내의 샘플링값을 독출하여 현재 주기내의 샘플링값과 비교하고, 그 비교결과 일치되는 지점의 위상에 가장FG신호를 형성하여 원FG신호와 소정 에지 사이의 간격을 측정하여 속도정보를 추출하고, 그 속도정보에 따라 상기 모터를 구동시키는 제어부; 및 상기 제어부의 전단에는 정현파 형태의 FG신호를 구형파 형태로 변환하여 제어부로 출력하는 구형파발생부를 포함하는 캡스턴 서보모터의 저속제어장치.A capstan servo system including a frequency generator for generating a frequency (FG) signal proportional to a rotational speed of a motor, the capstan servo system comprising: an A / D converter for sampling and outputting a sinusoidal wave shaped FG signal at predetermined sampling intervals; A memory for storing or reading sampling values in two adjacent periods under control of the controller; The sampling value in the current period of the sine wave is stored in the memory, and at the same time, the sampling value in the previous period is read from the memory and compared with the sampling value in the current period, and the most FG signal is formed at the phase of the matching point as a result of the comparison. A controller configured to measure a distance between the original FG signal and a predetermined edge to extract speed information, and drive the motor according to the speed information; And a square wave generator configured to convert a sinusoidal wave shaped FG signal into a square wave shape and output the square wave generator to a control unit at a front end of the control unit. 제1항에 있어서, 상기 주파수발생기와 상기 구형파발생부 사이에는 FG신호의 증폭율을 높이기 위한 증폭부가 더 포함되는 것을 특징으로 하는 캡스턴 서보모터의 저속제어장치.The low speed control device of a capstan servo motor of claim 1, further comprising an amplifying unit between the frequency generator and the square wave generator to increase an amplification rate of the FG signal. 제2항에 있어서, 상기 증폭부와 상기 A/D변환부 사이에 상기 모터의 저속 회전시에만 상기 제어부의 제어하에 온(ON)상태가 되는 스위치가 더 포함하는 것을 특징으로 하는 캡스턴 서보모터의 저속제어장치.3. The capstan servomotor of claim 2, further comprising a switch between the amplifier and the A / D converter to be turned on under the control of the controller only when the motor rotates at a low speed. Low speed control device. 제1항에 있어서, 상기 메모리는 이전 주기내의 샘플링 값을 저장하는 제1메모리와 현재 주기내의 샘플링값을 저장하는 제2메모리로 구성되는 것을 특징으로 하는 캡스턴 서보모터의 저속제어장치.2. The low speed control apparatus of a capstan servomotor according to claim 1, wherein the memory comprises a first memory for storing sampling values in a previous period and a second memory for storing sampling values in a current period. 제4항에 있어서, 상기 메모리는 상기 제1메모리에 저장된 샘플링값과 상기 제2메모리에 저장된 샘플링값을 비교하여 상기 제어부로 출력하고, 다음 주기의 위상값이 인가되면 상기 제1메모리에 저장된 위상값은 삭제하고, 상기 제2메모리의 데이터를 제1메모리로 옮기는 것을 특징으로 하는 캡스턴 서보모터의 저속제어장치.5. The memory device of claim 4, wherein the memory compares the sampling value stored in the first memory with the sampling value stored in the second memory and outputs the result to the controller. And a value is deleted, and the data of the second memory is transferred to the first memory. 제1항에 있어서, 상기 제어부는 외부로부터 인가되는 가상 FG발생제어신호에 따라 가상FG신호의 발생빈도횟수를 제어하는 것을 특징으로 하는 캡스턴 서보모터의 저속제어장치.The low speed control apparatus of the capstan servo motor of claim 1, wherein the controller controls the frequency of occurrence of the virtual FG signal according to a virtual FG generation control signal applied from the outside. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019950002241A 1995-02-08 1995-02-08 Capstan motor speed control device KR0185917B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950002241A KR0185917B1 (en) 1995-02-08 1995-02-08 Capstan motor speed control device

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Application Number Priority Date Filing Date Title
KR1019950002241A KR0185917B1 (en) 1995-02-08 1995-02-08 Capstan motor speed control device

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KR960032389A true KR960032389A (en) 1996-09-17
KR0185917B1 KR0185917B1 (en) 1999-04-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030028887A (en) * 2001-10-04 2003-04-11 주식회사 대우일렉트로닉스 Apparatus for controlling ball bearing in capstan motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030055462A (en) * 2001-12-26 2003-07-04 삼성전기주식회사 Drive ic of drum motor for vcr

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030028887A (en) * 2001-10-04 2003-04-11 주식회사 대우일렉트로닉스 Apparatus for controlling ball bearing in capstan motor

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KR0185917B1 (en) 1999-04-15

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