JPS5688683A - Control circuit for motor of sewing machine - Google Patents

Control circuit for motor of sewing machine

Info

Publication number
JPS5688683A
JPS5688683A JP16633579A JP16633579A JPS5688683A JP S5688683 A JPS5688683 A JP S5688683A JP 16633579 A JP16633579 A JP 16633579A JP 16633579 A JP16633579 A JP 16633579A JP S5688683 A JPS5688683 A JP S5688683A
Authority
JP
Japan
Prior art keywords
shaft
sewing
sewing machine
motor
stopped
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
JP16633579A
Other languages
Japanese (ja)
Inventor
Suzuo Kojima
Yasunobu Arita
Yutaka Kusaba
Nobuyoshi Matsumura
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
Maruzen Sewing Machine Co Ltd
Original Assignee
Mitsubishi Electric Corp
Maruzen Sewing Machine 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 Mitsubishi Electric Corp, Maruzen Sewing Machine Co Ltd filed Critical Mitsubishi Electric Corp
Priority to JP16633579A priority Critical patent/JPS5688683A/en
Publication of JPS5688683A publication Critical patent/JPS5688683A/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
    • H02P3/00—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06—Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Protection Of Generators And Motors (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE:To prevent the burning of the motor for the sewing machines beforehand at the time of locking caused by a hevy load, by stopping the circuit which triggers a thyristor when the rotation of the shaft of the main body of the sewing machine is stopped. CONSTITUTION:The sewing-machine motor 7 having a field coil 7a and a rotor 7b is connected to the output terminals of rectifiers 3-6 containing switching elements 3 and 4 with control electrodes, and drives the shaft 13 for driving a sewing- machine needle of the main body of the sewing machine. A trigger circuit 8 which triggers the switching element 3 with the electrodes is controlled by a magnet 12 which is provided on the shaft 13, and by magnetic field detecting switches 11a and 11b for detecting the top dead point and the bottom dead point of the sewing machine needle which is provided so as to oppose said magnet via a timer setting circuit 10 and a timer 9, depending on the rotation of the shaft 13. The operation of the trigger is stopped when the rotation of the shaft 13 is stopped.
JP16633579A 1979-12-20 1979-12-20 Control circuit for motor of sewing machine Pending JPS5688683A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16633579A JPS5688683A (en) 1979-12-20 1979-12-20 Control circuit for motor of sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16633579A JPS5688683A (en) 1979-12-20 1979-12-20 Control circuit for motor of sewing machine

Publications (1)

Publication Number Publication Date
JPS5688683A true JPS5688683A (en) 1981-07-18

Family

ID=15829449

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16633579A Pending JPS5688683A (en) 1979-12-20 1979-12-20 Control circuit for motor of sewing machine

Country Status (1)

Country Link
JP (1) JPS5688683A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147735A (en) * 1984-12-18 1986-07-05 株式会社マキタ Electrically operated tool

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61147735A (en) * 1984-12-18 1986-07-05 株式会社マキタ Electrically operated tool
JPH0435970B2 (en) * 1984-12-18 1992-06-12 Makita Electric Works Ltd

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