JPS566686A - Revolution speed controlling device for motor - Google Patents

Revolution speed controlling device for motor

Info

Publication number
JPS566686A
JPS566686A JP8020879A JP8020879A JPS566686A JP S566686 A JPS566686 A JP S566686A JP 8020879 A JP8020879 A JP 8020879A JP 8020879 A JP8020879 A JP 8020879A JP S566686 A JPS566686 A JP S566686A
Authority
JP
Japan
Prior art keywords
signal
revolution speed
pulse width
voltage
motor
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
JP8020879A
Other languages
Japanese (ja)
Inventor
Takashi Furuhata
Saburo Kazama
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP8020879A priority Critical patent/JPS566686A/en
Publication of JPS566686A publication Critical patent/JPS566686A/en
Pending 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
    • H02P23/18—Controlling the angular speed together with angular position or phase
    • H02P23/186—Controlling the angular speed together with angular position or phase of one shaft by controlling the prime mover

Landscapes

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

Abstract

PURPOSE:To economize the power consumption and to reduce the introducing time to a control system by obtaining a signal with a modulation means having the same period as a revolution speed signal and a duty ratio which is changed by an error signal with a reference signal and also by controlling a driving circuit with the said signal. CONSTITUTION:By corresponding detectors 8 and 12 to a rotating disc 7 connected to a motor 6, pulse signals G and B having a frequency corresponding to the respective revolution speed is obtained. Then an error voltage E0 is obtained by comparing a signal G with a reference signal H using a phase comparator 2 and it is input to a pulse width modulator 4 together with the signal B. A pulse signal P having a pulse width which is inversely proportional to the intensity of voltage of the voltage E0 is obtained and a driving circuit 5 is controlled by a signal P. As a result, when the speed is low, for instance, the period of the signal P is prolonged and the pulse width is enlarged, thereby enabling to reduce the introducing time to the servo system and improve the starting characteristic as well.
JP8020879A 1979-06-27 1979-06-27 Revolution speed controlling device for motor Pending JPS566686A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8020879A JPS566686A (en) 1979-06-27 1979-06-27 Revolution speed controlling device for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8020879A JPS566686A (en) 1979-06-27 1979-06-27 Revolution speed controlling device for motor

Publications (1)

Publication Number Publication Date
JPS566686A true JPS566686A (en) 1981-01-23

Family

ID=13711961

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8020879A Pending JPS566686A (en) 1979-06-27 1979-06-27 Revolution speed controlling device for motor

Country Status (1)

Country Link
JP (1) JPS566686A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57169616A (en) * 1981-04-10 1982-10-19 Advantest Corp Dot recorder
JPS5825471U (en) * 1981-08-12 1983-02-18 吉村　富雄 door wheel
JP2006242115A (en) * 2005-03-04 2006-09-14 Matsushita Electric Ind Co Ltd Pump and liquid supply apparatus having the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57169616A (en) * 1981-04-10 1982-10-19 Advantest Corp Dot recorder
JPS5825471U (en) * 1981-08-12 1983-02-18 吉村　富雄 door wheel
JP2006242115A (en) * 2005-03-04 2006-09-14 Matsushita Electric Ind Co Ltd Pump and liquid supply apparatus having the same

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