JPS55150793A - Speed-control device for sewing machine - Google Patents

Speed-control device for sewing machine

Info

Publication number
JPS55150793A
JPS55150793A JP5730779A JP5730779A JPS55150793A JP S55150793 A JPS55150793 A JP S55150793A JP 5730779 A JP5730779 A JP 5730779A JP 5730779 A JP5730779 A JP 5730779A JP S55150793 A JPS55150793 A JP S55150793A
Authority
JP
Japan
Prior art keywords
transistor
motor
photo
current
comparator
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
JP5730779A
Other languages
Japanese (ja)
Inventor
Masao Nakamura
Sumio Goto
Tetsuzo Kosako
Haruo Iwabuchi
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.)
Juki Corp
Original Assignee
Tokyo Juki 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 Tokyo Juki Industrial Co Ltd filed Critical Tokyo Juki Industrial Co Ltd
Priority to JP5730779A priority Critical patent/JPS55150793A/en
Publication of JPS55150793A publication Critical patent/JPS55150793A/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
    • H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current
    • H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power
    • H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
    • H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
    • H02P7/285—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only
    • H02P7/29—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation
    • H02P7/291—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual dc dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling armature supply only using pulse modulation with on-off control between two set points, e.g. controlling by hysteresis

Landscapes

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

Abstract

PURPOSE:To make highly reliable and excellently precise speed control possible by conducting the switching element of a main circuit and supplying a driving current when the actual speed of a motor becomes lower than the set speed. CONSTITUTION:At the starting of a motor, a generator G has no output, the voltage from a setting circuit B becomes large at a comparator C, and the current from a terminal Va is fed into a transistor Tr2, which is then turned on. Then, a photo diode PD and a photo-transistor PT are operated, a current is supplied to the motor M. When the rpm of the motor is increased, the output voltage of the generator G becomes large, and the output of the comparator C becomes low. Therefore, the current from the terminal Va is fed into the comparator C, and the transistor Tr2 is turned off. Thus, the photo-diode PD, photo-transistor PT, and a transistor Tr3 are turned off, and the motor is stopped.
JP5730779A 1979-05-10 1979-05-10 Speed-control device for sewing machine Pending JPS55150793A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5730779A JPS55150793A (en) 1979-05-10 1979-05-10 Speed-control device for sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5730779A JPS55150793A (en) 1979-05-10 1979-05-10 Speed-control device for sewing machine

Publications (1)

Publication Number Publication Date
JPS55150793A true JPS55150793A (en) 1980-11-22

Family

ID=13051896

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5730779A Pending JPS55150793A (en) 1979-05-10 1979-05-10 Speed-control device for sewing machine

Country Status (1)

Country Link
JP (1) JPS55150793A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57206288A (en) * 1981-06-11 1982-12-17 Matsushita Electric Ind Co Ltd Speed setting device for sewing machine
JPS57206289A (en) * 1981-06-11 1982-12-17 Matsushita Electric Ind Co Ltd Speed setting device for sewing machine
JPS57208881A (en) * 1981-06-15 1982-12-22 Matsushita Electric Ind Co Ltd Driving system for sewing machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57206288A (en) * 1981-06-11 1982-12-17 Matsushita Electric Ind Co Ltd Speed setting device for sewing machine
JPS57206289A (en) * 1981-06-11 1982-12-17 Matsushita Electric Ind Co Ltd Speed setting device for sewing machine
JPS6223593B2 (en) * 1981-06-11 1987-05-23 Matsushita Electric Ind Co Ltd
JPS6223592B2 (en) * 1981-06-11 1987-05-23 Matsushita Electric Ind Co Ltd
JPS57208881A (en) * 1981-06-15 1982-12-22 Matsushita Electric Ind Co Ltd Driving system for sewing machine
JPS6223594B2 (en) * 1981-06-15 1987-05-23 Matsushita Electric Ind Co Ltd

Similar Documents

Publication Publication Date Title
GB1368646A (en) Commutatorless dc motor
WO1982003879A1 (en) A driving control device
JPS5465322A (en) Motor speed control system
JPS55150793A (en) Speed-control device for sewing machine
GB1380995A (en) Electrical circuit for controlling a commutatorless direct-current electrical motor
US3441825A (en) Selected gain control system
GB1492583A (en) Alternating current generators
GB1002158A (en) Improvements relating to voltage regulating systems for generators
US3788250A (en) System for stopping sewing machine needle at predetermined position
KR910021507A (en) Operation device and operating method of the loom
JPS5688687A (en) Speed control device for sewing machine motor
GB1079525A (en) Speed control system for centrifuge motors and the like
GB1529210A (en) Safety supply circuit for washing machine drum driving motors
SU1001397A1 (en) Device for braking two-phase induction motor
JPS524809A (en) Motor drive control system for automatic tape winding device
SU1440989A1 (en) Apparatus for controlling sewing machine
SU123145A1 (en) Tool for stopping a pile cutting machine, such as velveteen
JPS52144726A (en) Excitation controller
JPS55147980A (en) Switching regulator
SU584423A1 (en) Device for supplying power to autonomous objects
SU1513044A1 (en) Apparatus for controlling the feeding of reserve slivers in draw frame
SU112019A1 (en) Device for automatic switching off of electric spark machine
SU556549A1 (en) Autotractor power supply system
JPS5735834A (en) Film feeding device
SU142142A1 (en) Feed controller for EDM machines