JPS5655A - Control unit for rotating speed - Google Patents

Control unit for rotating speed

Info

Publication number
JPS5655A
JPS5655A JP7423479A JP7423479A JPS5655A JP S5655 A JPS5655 A JP S5655A JP 7423479 A JP7423479 A JP 7423479A JP 7423479 A JP7423479 A JP 7423479A JP S5655 A JPS5655 A JP S5655A
Authority
JP
Japan
Prior art keywords
speed
switching
circuit
slope
revolutions
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.)
Pending
Application number
JP7423479A
Other languages
Japanese (ja)
Inventor
Masaru Hashirano
Yasuo Nishitani
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 JP7423479A priority Critical patent/JPS5655A/en
Publication of JPS5655A publication Critical patent/JPS5655A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Velocity Or Acceleration (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE: To safely perform the switching of number of revolutions, by switching the number of revolutions through the change of delay time in the delay circuit and switching the slope of the slope part of the trapezoid wave signal and the frequency characteristics of the integrating circuit through interlocking with the switching.
CONSTITUTION: The output of the frequency generator 8 detecting the rotating speed of VTR, etc. is fed to the servo IC having two functions of speed and phase controls, and the delay time of the externally mounted circuit 29 of the speed reference MM13 is changed with the switching signal generating circuit 33, allowing to selectively change the number of revolutions of the motor 7. Further, in interlocking with this, the slope of the slope part of the trapezoid signal is switched with the externally mounted circuits 30, 31 of the trapezoid circuits 14, 20 and the frequency characteristics of the integration circuit 54 is switched by giving the speed error output to the circuit 54. Accordingly, in interlocking with the speed switching ratio, the speed slope sensitivity and the frequency characteristics are switched, allowing to perform stable control even at the time of speed change of several times or more.
COPYRIGHT: (C)1981,JPO&Japio
JP7423479A 1979-06-12 1979-06-12 Control unit for rotating speed Pending JPS5655A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7423479A JPS5655A (en) 1979-06-12 1979-06-12 Control unit for rotating speed

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7423479A JPS5655A (en) 1979-06-12 1979-06-12 Control unit for rotating speed

Publications (1)

Publication Number Publication Date
JPS5655A true JPS5655A (en) 1981-01-06

Family

ID=13541264

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7423479A Pending JPS5655A (en) 1979-06-12 1979-06-12 Control unit for rotating speed

Country Status (1)

Country Link
JP (1) JPS5655A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61154379A (en) * 1984-12-27 1986-07-14 Toshiba Corp High speed reproducing device of video tape recorder
US4723900A (en) * 1985-03-01 1988-02-09 Kt-Suunnittelu Oy Extruder for casting concrete slabs

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50145114A (en) * 1974-05-10 1975-11-21
JPS5284416A (en) * 1975-12-29 1977-07-14 Matsushita Electric Ind Co Ltd Speed control device for dc motors
JPS5379507A (en) * 1976-12-23 1978-07-14 Sony Corp Recorder/reproducer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50145114A (en) * 1974-05-10 1975-11-21
JPS5284416A (en) * 1975-12-29 1977-07-14 Matsushita Electric Ind Co Ltd Speed control device for dc motors
JPS5379507A (en) * 1976-12-23 1978-07-14 Sony Corp Recorder/reproducer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61154379A (en) * 1984-12-27 1986-07-14 Toshiba Corp High speed reproducing device of video tape recorder
US4723900A (en) * 1985-03-01 1988-02-09 Kt-Suunnittelu Oy Extruder for casting concrete slabs

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