JPS57183289A - Speed controller for sewing machine - Google Patents

Speed controller for sewing machine

Info

Publication number
JPS57183289A
JPS57183289A JP56066964A JP6696481A JPS57183289A JP S57183289 A JPS57183289 A JP S57183289A JP 56066964 A JP56066964 A JP 56066964A JP 6696481 A JP6696481 A JP 6696481A JP S57183289 A JPS57183289 A JP S57183289A
Authority
JP
Japan
Prior art keywords
voltage
signal
transistor
base
pulse voltage
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
JP56066964A
Other languages
Japanese (ja)
Inventor
Hiroyuki Kanazawa
Tadashi Takahashi
Katsuhiro Shiobara
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56066964A priority Critical patent/JPS57183289A/en
Publication of JPS57183289A publication Critical patent/JPS57183289A/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
    • H02P7/00Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/06Arrangements 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
    • H02P7/18Arrangements 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
    • H02P7/24Arrangements 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
    • H02P7/28Arrangements 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
    • H02P7/285Arrangements 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
    • H02P7/29Arrangements 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
    • H02P7/2913Arrangements 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 whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value

Abstract

PURPOSE:To improve the constant speed controllability of a sewing machine by full-wave rectifying the AC output voltage of a tachometer generator and applying the voltage in a forward direction to the base of a transistor, thereby shortening the period of generating controlling pulse voltage. CONSTITUTION:The AC output voltage (a) of the AC tachometer generator TG which detects the speed of a motor M is rectified by a full-wave rectifier DB as a rectified voltage (f), and the voltage (f) is applied to the base of a transistor TR3 in the forward direction through a resistor R5, thereby obtaining a pulse voltage (g) at the collector. A monostable multivbrator MM3 is triggered with the fall of the pulse voltage (g) to produce a pulse voltage (h), which is converted via a resistor R7 and a capacitor C1 into a triangular signal (i). A comparator COMP outputs a signal (j) when the triangular signal (i) is lower than a speed command signal VX, producing a signal (j), and an AND circuit AND4 applies the signal (j) to the base of a transistor TR4 when an operation command signal DTS is at high level.
JP56066964A 1981-05-06 1981-05-06 Speed controller for sewing machine Pending JPS57183289A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56066964A JPS57183289A (en) 1981-05-06 1981-05-06 Speed controller for sewing machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56066964A JPS57183289A (en) 1981-05-06 1981-05-06 Speed controller for sewing machine

Publications (1)

Publication Number Publication Date
JPS57183289A true JPS57183289A (en) 1982-11-11

Family

ID=13331207

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56066964A Pending JPS57183289A (en) 1981-05-06 1981-05-06 Speed controller for sewing machine

Country Status (1)

Country Link
JP (1) JPS57183289A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284388U (en) * 1985-11-14 1987-05-29
JPS63189197A (en) * 1987-01-30 1988-08-04 Juki Kk Flickering preventing apparatus at driving time of servo motor
JP2006102399A (en) * 2004-10-08 2006-04-20 Juki Corp Sewing machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6284388U (en) * 1985-11-14 1987-05-29
JPS63189197A (en) * 1987-01-30 1988-08-04 Juki Kk 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
JP2006102399A (en) * 2004-10-08 2006-04-20 Juki Corp Sewing machine

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