JPS54126942A - Protection of motor operation - Google Patents

Protection of motor operation

Info

Publication number
JPS54126942A
JPS54126942A JP3424178A JP3424178A JPS54126942A JP S54126942 A JPS54126942 A JP S54126942A JP 3424178 A JP3424178 A JP 3424178A JP 3424178 A JP3424178 A JP 3424178A JP S54126942 A JPS54126942 A JP S54126942A
Authority
JP
Japan
Prior art keywords
motor
switch
seismometer
power source
signal
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
JP3424178A
Other languages
Japanese (ja)
Inventor
Kosaku Ichikawa
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP3424178A priority Critical patent/JPS54126942A/en
Publication of JPS54126942A publication Critical patent/JPS54126942A/en
Pending legal-status Critical Current

Links

Landscapes

  • Protection Of Generators And Motors (AREA)

Abstract

PURPOSE: To minimize damage to motor by the procedure in which a seismometer is provided near motor and when earthquake occurred, the motor in time-division operation or in a natural deceleration operation is reconnected to power source by the output signal of the seismometer.
CONSTITUTION: The protection system for the operation of motor consists of the power source 1, the flat type motor 2 with great inertia, the switch 3 by which to separate the motor 2 from the power source 1, the rotation detector 4 by which to detect the rotation frequency of the motor 2, the switch control circuit 5 by which to send out ON and OFF command to the switch 3 for the time-division operation of the motor 2 by using the rotation frequency signal A from the rotation detector 4 as the input, and the seismometer 6 by which to send out the earthquake dection signal C when the magnitude of earthquake exceeds a predetermined value. The switch control circuit 5, when receiving the signal C, sends out a command for making switch and thus the switch 3 is closed regardless of time-division operation or natural deceleration operation of motor.
COPYRIGHT: (C)1979,JPO&Japio
JP3424178A 1978-03-27 1978-03-27 Protection of motor operation Pending JPS54126942A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3424178A JPS54126942A (en) 1978-03-27 1978-03-27 Protection of motor operation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3424178A JPS54126942A (en) 1978-03-27 1978-03-27 Protection of motor operation

Publications (1)

Publication Number Publication Date
JPS54126942A true JPS54126942A (en) 1979-10-02

Family

ID=12408653

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3424178A Pending JPS54126942A (en) 1978-03-27 1978-03-27 Protection of motor operation

Country Status (1)

Country Link
JP (1) JPS54126942A (en)

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