JPS54126942A - Protection of motor operation - Google Patents
Protection of motor operationInfo
- 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
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
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) |
-
1978
- 1978-03-27 JP JP3424178A patent/JPS54126942A/en active Pending
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