JPS57203959A - Detecting method for velocity of synchronous motor - Google Patents

Detecting method for velocity of synchronous motor

Info

Publication number
JPS57203959A
JPS57203959A JP56088522A JP8852281A JPS57203959A JP S57203959 A JPS57203959 A JP S57203959A JP 56088522 A JP56088522 A JP 56088522A JP 8852281 A JP8852281 A JP 8852281A JP S57203959 A JPS57203959 A JP S57203959A
Authority
JP
Japan
Prior art keywords
velocity
synchronous motor
generated
pulse
current instruction
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
JP56088522A
Other languages
Japanese (ja)
Other versions
JPS6156951B2 (en
Inventor
Mitsuo Kurakake
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.)
Fanuc Corp
Original Assignee
Fanuc Corp
Fujitsu Fanuc 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 Fanuc Corp, Fujitsu Fanuc Ltd filed Critical Fanuc Corp
Priority to JP56088522A priority Critical patent/JPS57203959A/en
Priority to US06/386,130 priority patent/US4575667A/en
Priority to DE8282302936T priority patent/DE3268256D1/en
Priority to EP82302936A priority patent/EP0069469B1/en
Publication of JPS57203959A publication Critical patent/JPS57203959A/en
Publication of JPS6156951B2 publication Critical patent/JPS6156951B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/489—Digital circuits therefor

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Linear Or Angular Velocity Measurement And Their Indicating Devices (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE:To detect precisely an actual velocity of a synchronous motor by conducting an operation for preestimation of a present actual velocity according to the characteristic formula of the synchronous motor by using a past current instruction value and a past detection speed every time when an interrupt signal of a constant cycle is generated. CONSTITUTION:FF402 is set by a pulse Pa generated from a pulse generator 102 fitted to the shaft of a synchronous motor, while being reset by a velocity operation end signal OPEN generated from a processing unit 113. An interrupt pulse generating circuit 403 generates a velocity operation interrupt pulse ITP of a constant cycle. When the pulse ITP is generated at a time, the unit 113 senses the state of setting of FF402. When FF402 is not set, the unit 113 executes an operation of a prescribed formula by using a past detection speed V(K-1) and a past current instruction IS(K-2) which are stored in a data memory 113c, and thereby preestimates the velocity of rotation V(K). Then, by taking the velocity V(K) as an actual velocity, the difference between the same and an instructed velocity VD is determined, and based thereon, a primary-current instruction is delivered to a synchronous motor 101.
JP56088522A 1981-06-09 1981-06-09 Detecting method for velocity of synchronous motor Granted JPS57203959A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP56088522A JPS57203959A (en) 1981-06-09 1981-06-09 Detecting method for velocity of synchronous motor
US06/386,130 US4575667A (en) 1981-06-09 1982-06-07 AC Motor speed control apparatus
DE8282302936T DE3268256D1 (en) 1981-06-09 1982-06-08 Apparatus for speed detection
EP82302936A EP0069469B1 (en) 1981-06-09 1982-06-08 Apparatus for speed detection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56088522A JPS57203959A (en) 1981-06-09 1981-06-09 Detecting method for velocity of synchronous motor

Publications (2)

Publication Number Publication Date
JPS57203959A true JPS57203959A (en) 1982-12-14
JPS6156951B2 JPS6156951B2 (en) 1986-12-04

Family

ID=13945160

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56088522A Granted JPS57203959A (en) 1981-06-09 1981-06-09 Detecting method for velocity of synchronous motor

Country Status (1)

Country Link
JP (1) JPS57203959A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188385A (en) * 1983-04-07 1984-10-25 Fanuc Ltd Servo control circuit

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62177474U (en) * 1986-04-28 1987-11-11
JPH0321718Y2 (en) * 1988-07-19 1991-05-13

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188385A (en) * 1983-04-07 1984-10-25 Fanuc Ltd Servo control circuit

Also Published As

Publication number Publication date
JPS6156951B2 (en) 1986-12-04

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