JPS5775321A - Digital servo device - Google Patents

Digital servo device

Info

Publication number
JPS5775321A
JPS5775321A JP55152912A JP15291280A JPS5775321A JP S5775321 A JPS5775321 A JP S5775321A JP 55152912 A JP55152912 A JP 55152912A JP 15291280 A JP15291280 A JP 15291280A JP S5775321 A JPS5775321 A JP S5775321A
Authority
JP
Japan
Prior art keywords
gate
signal
output
speed
measurement
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
JP55152912A
Other languages
Japanese (ja)
Inventor
Yutaka Oota
Masaru Hashirano
Tatsuo Wada
Seiji Yamaguchi
Toshiomi Yabu
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 JP55152912A priority Critical patent/JPS5775321A/en
Publication of JPS5775321A publication Critical patent/JPS5775321A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P5/00Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
    • H02P5/46Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another
    • H02P5/52Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors for speed regulation of two or more dynamo-electric motors in relation to one another additionally providing control of relative angular displacement
    • H02P5/56Speed and position comparison between the motors by electrical means

Abstract

PURPOSE:To improve the acquisition of phase synchronism, by setting the PWM output of the phase to a signal having about 50% duty cycle with an external signal and until the speed of a rotor gets within the range of measurement. CONSTITUTION:The start command signals (t) and (u) which are used for the start countermeasure of the speed control part are applied to detect the fact that the speed of a rotor is under the range of measurement, i.e., that j1 is equal to 2<n>-1. At the same time, the output of an NOR gate circuit 20 is used to detect the fact that the speed of the rotor is higher than the range of measurement. Then a command signal B for the acquisition of phase synchronism which is set at ''L'' is produced when the speed of the rotor is outside the range of measurement. Then an NOR gate 25 is closed when the signal B is set at ''H'', and at the same time an NOR gate 24 is opened to extract output of a PWM circuit 19 as it is and in the form of the output of an NOR gate 26. When the signal B is at ''L'', the gate 24 is closed with the gate 25 opened, respectively. Then a signal E which is exactly equal to the sigal having about 50% duty cycle of the PWM output of the phase is delivered as the output of the gate 26.
JP55152912A 1980-10-29 1980-10-29 Digital servo device Pending JPS5775321A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55152912A JPS5775321A (en) 1980-10-29 1980-10-29 Digital servo device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55152912A JPS5775321A (en) 1980-10-29 1980-10-29 Digital servo device

Publications (1)

Publication Number Publication Date
JPS5775321A true JPS5775321A (en) 1982-05-11

Family

ID=15550852

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55152912A Pending JPS5775321A (en) 1980-10-29 1980-10-29 Digital servo device

Country Status (1)

Country Link
JP (1) JPS5775321A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142710A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Controller of rotating body
JPH0591777A (en) * 1991-09-25 1993-04-09 Sharp Corp Pull-in improvement circuit for controlling motor

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5026022A (en) * 1973-07-10 1975-03-18
JPS5381894A (en) * 1976-12-25 1978-07-19 Matsushita Electric Ind Co Ltd Digital rotary body controller
JPS5532138A (en) * 1978-08-30 1980-03-06 Sony Corp Servo circuit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5026022A (en) * 1973-07-10 1975-03-18
JPS5381894A (en) * 1976-12-25 1978-07-19 Matsushita Electric Ind Co Ltd Digital rotary body controller
JPS5532138A (en) * 1978-08-30 1980-03-06 Sony Corp Servo circuit

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60142710A (en) * 1983-12-29 1985-07-27 Matsushita Electric Ind Co Ltd Controller of rotating body
JPH0591777A (en) * 1991-09-25 1993-04-09 Sharp Corp Pull-in improvement circuit for controlling motor

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