JPS5532429A - Speed controller for dc motor - Google Patents

Speed controller for dc motor

Info

Publication number
JPS5532429A
JPS5532429A JP10363478A JP10363478A JPS5532429A JP S5532429 A JPS5532429 A JP S5532429A JP 10363478 A JP10363478 A JP 10363478A JP 10363478 A JP10363478 A JP 10363478A JP S5532429 A JPS5532429 A JP S5532429A
Authority
JP
Japan
Prior art keywords
motor
transistor
voltage
speed
switch
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.)
Granted
Application number
JP10363478A
Other languages
Japanese (ja)
Other versions
JPS6120229B2 (en
Inventor
Katsuji Soeda
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.)
Yamamoto Electric Industrial Co Ltd
Original Assignee
Yamamoto 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 Yamamoto Electric Industrial Co Ltd filed Critical Yamamoto Electric Industrial Co Ltd
Priority to JP10363478A priority Critical patent/JPS5532429A/en
Priority to US06/048,369 priority patent/US4274037A/en
Publication of JPS5532429A publication Critical patent/JPS5532429A/en
Publication of JPS6120229B2 publication Critical patent/JPS6120229B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Control Of Direct Current Motors (AREA)
  • Sewing Machines And Sewing (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE: To reduce the fluctuation in the speed of a DC motor due to that in a load or the like, by connecting a transistor in series with a capacitor for turning on an energization control thyristor and by controlling the transistor depending on the difference between the voltage of the motor and a speed reference voltage.
CONSTITUTION: A switch 31 is set on a contact (a) to select a continuous sewing mode. A controller 5 is then depressed to close a switch 24 to supply the base of the transistor 38 with the speed reference voltage corresponding to the resistance of a variable resistor 25. The voltage of the motor is applied as an inverse voltage to the base of the transistor 38 through a Zener diode 58. The transistor 38 is controlled depending on the difference between the motor voltage and the speed reference voltage to regulate the charging current of the capacitor 33. As a result, the turn-on phase angle of the thyristor 3 is controlled to regulate the speed of the motor 4. When the switch 31 is set on another contact (b), one-stitch sewing can be performed.
COPYRIGHT: (C)1980,JPO&Japio
JP10363478A 1978-06-16 1978-08-25 Speed controller for dc motor Granted JPS5532429A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP10363478A JPS5532429A (en) 1978-08-25 1978-08-25 Speed controller for dc motor
US06/048,369 US4274037A (en) 1978-06-16 1979-06-14 Motor speed control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10363478A JPS5532429A (en) 1978-08-25 1978-08-25 Speed controller for dc motor

Publications (2)

Publication Number Publication Date
JPS5532429A true JPS5532429A (en) 1980-03-07
JPS6120229B2 JPS6120229B2 (en) 1986-05-21

Family

ID=14359194

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10363478A Granted JPS5532429A (en) 1978-06-16 1978-08-25 Speed controller for dc motor

Country Status (1)

Country Link
JP (1) JPS5532429A (en)

Also Published As

Publication number Publication date
JPS6120229B2 (en) 1986-05-21

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