JPS5795196A - Speed control circuit for electrically driven sewing machine - Google Patents

Speed control circuit for electrically driven sewing machine

Info

Publication number
JPS5795196A
JPS5795196A JP17118680A JP17118680A JPS5795196A JP S5795196 A JPS5795196 A JP S5795196A JP 17118680 A JP17118680 A JP 17118680A JP 17118680 A JP17118680 A JP 17118680A JP S5795196 A JPS5795196 A JP S5795196A
Authority
JP
Japan
Prior art keywords
speed control
gain
operational amplifier
amplifier
control circuit
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
JP17118680A
Other languages
Japanese (ja)
Inventor
Yasunobu Arita
Yutaka Kusaba
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP17118680A priority Critical patent/JPS5795196A/en
Publication of JPS5795196A publication Critical patent/JPS5795196A/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
    • H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
    • H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
    • H02P25/10—Commutator motors, e.g. repulsion motors
    • H02P25/14—Universal motors

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Control Of Direct Current Motors (AREA)

Abstract

PURPOSE:To make a fine speed control possible by a method wherein a gain of an operational amplifier is varied by a variable registor with responding to a push of a foot controller and a charging current of a capacitor that triggers a thyristor is varied. CONSTITUTION:By a thyristor 3 operated by a trigger circuit 4 that is controlled by a capacitor charging circuit 5 for triggering, a motor M is driven. And in addition to application of a signal that responds to a pushed degree of a foot controller 6 to a non-inverted input of an operational amplifier 12, by connecting a series circuit of a voltage regulation diode 11 and a maxiumum speed setting variable resistor 7 between input and output terminal of the operational amplifier 12, the capacitor charging circuit 5 is controlled. Consequently by keeping a gain of the amplifier 12 constant immediately after the controller 6 is turned on, and by varying a gain of the amplifier 12 by a variable resistor 7 afterwards, a fine speed control at low speed region can be attained when setting at a high speed is done.
JP17118680A 1980-12-03 1980-12-03 Speed control circuit for electrically driven sewing machine Pending JPS5795196A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17118680A JPS5795196A (en) 1980-12-03 1980-12-03 Speed control circuit for electrically driven sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17118680A JPS5795196A (en) 1980-12-03 1980-12-03 Speed control circuit for electrically driven sewing machine

Publications (1)

Publication Number Publication Date
JPS5795196A true JPS5795196A (en) 1982-06-12

Family

ID=15918592

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17118680A Pending JPS5795196A (en) 1980-12-03 1980-12-03 Speed control circuit for electrically driven sewing machine

Country Status (1)

Country Link
JP (1) JPS5795196A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6382697A (en) * 1986-09-25 1988-04-13 ジャガー株式会社 Motor driving control apparatus of electromotive sewing machine
JPS63189197A (en) * 1987-01-30 1988-08-04 ジューキ株式会社 Flickering preventing apparatus at driving time of servo motor
JPH03149092A (en) * 1989-11-06 1991-06-25 Hitachi Ltd Sewing machine control device
KR100399794B1 (en) * 1999-12-22 2003-09-29 엔이씨 엘씨디 테크놀로지스, 엘티디. Signal processing circuit board and liquid crystal display apparatus with variable resistor which are hardly declined in the mechanical strength while its variable resistor is not limited to one particular location for the installation

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6382697A (en) * 1986-09-25 1988-04-13 ジャガー株式会社 Motor driving control apparatus of electromotive sewing machine
JPS63189197A (en) * 1987-01-30 1988-08-04 ジューキ株式会社 Flickering preventing apparatus at driving time of servo motor
JPH0233277B2 (en) * 1987-01-30 1990-07-26 Juki Kk
US5016133A (en) * 1987-01-30 1991-05-14 Juki Corporation Apparatus for flicker protection when a servo-motor starts
JPH03149092A (en) * 1989-11-06 1991-06-25 Hitachi Ltd Sewing machine control device
KR100399794B1 (en) * 1999-12-22 2003-09-29 엔이씨 엘씨디 테크놀로지스, 엘티디. Signal processing circuit board and liquid crystal display apparatus with variable resistor which are hardly declined in the mechanical strength while its variable resistor is not limited to one particular location for the installation

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