JPS55109180A - Slow starter for induction motor - Google Patents

Slow starter for induction motor

Info

Publication number
JPS55109180A
JPS55109180A JP1601179A JP1601179A JPS55109180A JP S55109180 A JPS55109180 A JP S55109180A JP 1601179 A JP1601179 A JP 1601179A JP 1601179 A JP1601179 A JP 1601179A JP S55109180 A JPS55109180 A JP S55109180A
Authority
JP
Japan
Prior art keywords
motor
voltage
current
variable resistor
primary
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
JP1601179A
Other languages
Japanese (ja)
Inventor
Yozo Sanaka
Original Assignee
Toshiba 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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP1601179A priority Critical patent/JPS55109180A/en
Publication of JPS55109180A publication Critical patent/JPS55109180A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To sufficiently slowly start a three-phase induction motor by further lowering the voltage to the motor when the current of the motor becomes less than set value and controlling the primary voltage in response to the primary current of the motor.
CONSTITUTION: Since the output of a current detector 26 becomes zero due to large primary current of a three-phase induction motor IM when starting the motor IM, thyristors 1∼3 are controlled by the set voltage by a variable resistor 12. As the speed of the motor is raised, the primary current of the motor reduced. When the primary current becomes less than predetermined value, the output of a current detector 26 becomes "1". Accordingly, the voltage set by the variable resistor 12 is stopped at an AND gate 30. Thus, the thyristors 1∼3 are conrolled by the voltage set by the variable resistor 29. Thus, relatively uniform accelerating torque can be provided over the entire range of the accelerating period of the motor to slowly start the motor.
COPYRIGHT: (C)1980,JPO&Japio
JP1601179A 1979-02-16 1979-02-16 Slow starter for induction motor Pending JPS55109180A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1601179A JPS55109180A (en) 1979-02-16 1979-02-16 Slow starter for induction motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1601179A JPS55109180A (en) 1979-02-16 1979-02-16 Slow starter for induction motor

Publications (1)

Publication Number Publication Date
JPS55109180A true JPS55109180A (en) 1980-08-22

Family

ID=11904634

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1601179A Pending JPS55109180A (en) 1979-02-16 1979-02-16 Slow starter for induction motor

Country Status (1)

Country Link
JP (1) JPS55109180A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60500989A (en) * 1983-04-05 1985-06-27
EP0194400A1 (en) * 1985-03-11 1986-09-17 El-Fi Innovationer Ab A method of starting an asynchronous motor and an apparatus for carrying said method into effect

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60500989A (en) * 1983-04-05 1985-06-27
EP0194400A1 (en) * 1985-03-11 1986-09-17 El-Fi Innovationer Ab A method of starting an asynchronous motor and an apparatus for carrying said method into effect

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