JPS5769423A - Rotation controller - Google Patents

Rotation controller

Info

Publication number
JPS5769423A
JPS5769423A JP55146136A JP14613680A JPS5769423A JP S5769423 A JPS5769423 A JP S5769423A JP 55146136 A JP55146136 A JP 55146136A JP 14613680 A JP14613680 A JP 14613680A JP S5769423 A JPS5769423 A JP S5769423A
Authority
JP
Japan
Prior art keywords
signal
motor
circuit
synchronizing signal
frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP55146136A
Other languages
Japanese (ja)
Other versions
JPH028554B2 (en
Inventor
Seizo Tsuji
Ryoichi Imanaka
Akihiro Sakata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP55146136A priority Critical patent/JPS5769423A/en
Publication of JPS5769423A publication Critical patent/JPS5769423A/en
Publication of JPH028554B2 publication Critical patent/JPH028554B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P23/00—Arrangements or methods for the control of AC motors characterised by a control method other than vector control
    • H02P23/16—Controlling the angular speed of one shaft

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rotational Drive Of Disk (AREA)
  • Safety Devices In Control Systems (AREA)
  • Control Of Velocity Or Acceleration (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To exercise stable rotation control by obtaining the best rotational frequency by switching a rotation controlling circuit for a disk motor according to the presence of a synchronizing signal and by adjusting the rotational frequency of the motor when the synchronizing signal is not detected. CONSTITUTION:A signal recorded on a disk is read by a pickup 3 and only a synchronizing signal is extracted from the output of a demodulator 4 by a synchronous separating circuit 5 and inputted to a synchronizing-signal detecting circuit 6 and a speed controlling circuit 8. A motor controlling signal, i.e., the output of an amplifier 9 is inputted to the terminal A of a switch 10 when the synchronizing signal of the detecting circuit 6 is present or to the terminal B when not. Namely, when the synchronizing signal is not present, the output frequency of an oscillator 7 using phase standard is converted into a function voltage waveform through a frequency divider 16 and a waveform shaping circuit 15, and it is added to the rotation detection signal of a motor by a speed detecting circuit 2 to input the sum to the terminal B via an amplifier 14. Thus, the rotational frequency of the motor 2 is adjusted continuously at a low frequency.
JP55146136A 1980-10-17 1980-10-17 Rotation controller Granted JPS5769423A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55146136A JPS5769423A (en) 1980-10-17 1980-10-17 Rotation controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55146136A JPS5769423A (en) 1980-10-17 1980-10-17 Rotation controller

Publications (2)

Publication Number Publication Date
JPS5769423A true JPS5769423A (en) 1982-04-28
JPH028554B2 JPH028554B2 (en) 1990-02-26

Family

ID=15400949

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55146136A Granted JPS5769423A (en) 1980-10-17 1980-10-17 Rotation controller

Country Status (1)

Country Link
JP (1) JPS5769423A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59175391A (en) * 1983-03-23 1984-10-04 Matsushita Electric Ind Co Ltd Rotation controller
JPS61194501A (en) * 1985-02-22 1986-08-28 Pioneer Electronic Corp Servo system
JPS6278766A (en) * 1985-10-02 1987-04-11 Nippon Gakki Seizo Kk Control circuit for disk motor
WO2002029804A1 (en) * 2000-10-04 2002-04-11 Sanyo Electric Co., Ltd. Disk device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59175391A (en) * 1983-03-23 1984-10-04 Matsushita Electric Ind Co Ltd Rotation controller
JPS61194501A (en) * 1985-02-22 1986-08-28 Pioneer Electronic Corp Servo system
JPS6278766A (en) * 1985-10-02 1987-04-11 Nippon Gakki Seizo Kk Control circuit for disk motor
JPH0352659B2 (en) * 1985-10-02 1991-08-12 Yamaha Corp
WO2002029804A1 (en) * 2000-10-04 2002-04-11 Sanyo Electric Co., Ltd. Disk device

Also Published As

Publication number Publication date
JPH028554B2 (en) 1990-02-26

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