JPS54116653A - Abnormal revolution preventive method of body of revolution - Google Patents

Abnormal revolution preventive method of body of revolution

Info

Publication number
JPS54116653A
JPS54116653A JP2346878A JP2346878A JPS54116653A JP S54116653 A JPS54116653 A JP S54116653A JP 2346878 A JP2346878 A JP 2346878A JP 2346878 A JP2346878 A JP 2346878A JP S54116653 A JPS54116653 A JP S54116653A
Authority
JP
Japan
Prior art keywords
motor
revolution
abnormal
short
making
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
JP2346878A
Other languages
Japanese (ja)
Inventor
Shoji Kobayashi
Hiroshi Horikawa
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.)
Hitachi Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Hitachi Ltd
Nippon Telegraph and Telephone 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 Hitachi Ltd, Nippon Telegraph and Telephone Corp filed Critical Hitachi Ltd
Priority to JP2346878A priority Critical patent/JPS54116653A/en
Publication of JPS54116653A publication Critical patent/JPS54116653A/en
Pending legal-status Critical Current

Links

Landscapes

  • Protection Of Generators And Motors (AREA)
  • Motor And Converter Starters (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

PURPOSE: To prevent the abnormal revolution of a motor due to abnormal voltage in the case when making a power source, by short-circuiting the output of an amplifier, which must be applied to the motor, when making the power source, by releasing short-circuit by a short-circuit releasing signal and by applying the output to the motor.
CONSTITUTION: Voltage at a point A becomes to a high level by applying a short- circuit releasing signal S after making a power source - after a condenser 5 is charged, a transistor 6 is in ON, a relay 8 is energized, its contact 8a is closed while a transistor is in OFF because a portion between a base and an emitter of the transistor 7 is short-circuited by means of the transistor 6, and a contact 9a is opened because a relay 9 is de-energized. Consequently, the voltage of OUT1 becomes equal to the voltage of OUT2, the output of an amplifier 1 is applied to a motor 3 through the contact 8a of a switching circuit 2 and the motor 3 is started. Thus, abnormal output voltage by the unstably action of the amplifier 1 in the case when making the power source is not applied to the motor 3, and the abnormal revolution of the motor in the case when making the power source can be prevented.
COPYRIGHT: (C)1979,JPO&Japio
JP2346878A 1978-03-03 1978-03-03 Abnormal revolution preventive method of body of revolution Pending JPS54116653A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2346878A JPS54116653A (en) 1978-03-03 1978-03-03 Abnormal revolution preventive method of body of revolution

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2346878A JPS54116653A (en) 1978-03-03 1978-03-03 Abnormal revolution preventive method of body of revolution

Publications (1)

Publication Number Publication Date
JPS54116653A true JPS54116653A (en) 1979-09-11

Family

ID=12111352

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2346878A Pending JPS54116653A (en) 1978-03-03 1978-03-03 Abnormal revolution preventive method of body of revolution

Country Status (1)

Country Link
JP (1) JPS54116653A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199482A (en) * 1981-05-30 1982-12-07 Diesel Kiki Co Ltd Drive circuit for motor for car
JPS6082992U (en) * 1983-11-09 1985-06-08 株式会社日立製作所 motor control circuit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57199482A (en) * 1981-05-30 1982-12-07 Diesel Kiki Co Ltd Drive circuit for motor for car
JPH0116112B2 (en) * 1981-05-30 1989-03-22 Diesel Kiki Co
JPS6082992U (en) * 1983-11-09 1985-06-08 株式会社日立製作所 motor control circuit

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