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JPS5479419A - Lost power source detecting device - Google Patents

Lost power source detecting device

Info

Publication number
JPS5479419A
JPS5479419A JP14679277A JP14679277A JPS5479419A JP S5479419 A JPS5479419 A JP S5479419A JP 14679277 A JP14679277 A JP 14679277A JP 14679277 A JP14679277 A JP 14679277A JP S5479419 A JPS5479419 A JP S5479419A
Authority
JP
Japan
Prior art keywords
motor
electrical power
changing rate
detecting
lost
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
JP14679277A
Other languages
Japanese (ja)
Inventor
Hiroki Hasegawa
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 JP14679277A priority Critical patent/JPS5479419A/en
Publication of JPS5479419A publication Critical patent/JPS5479419A/en
Pending legal-status Critical Current

Links

Landscapes

  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE: To detect a lost motor primary voltage within a short period of a time by detecting a current changing rate and a speed changing rate of a motor at a Scherbius device equipped with an electrical power converting device to control a secondary power of a wound type induction motor.
CONSTITUTION: To an alternating current bus-bar 10 a motor 11 is connected and to a secondary side of this motor 11 an electrical power converter 12 to return an electrical power induced in a secondary side of the motor 11 to the bus-bar 10 through a transformer 13 is connected. Signals from a current detector 12C within a converter 12 and from a speed detector 14 of the motor 11 are introduced to changing rate detecting circuits 19A,19B respectively and by detecting both outputs continuing during certain constant times together a lost primary voltage is detected.
COPYRIGHT: (C)1979,JPO&Japio
JP14679277A 1977-12-07 1977-12-07 Lost power source detecting device Pending JPS5479419A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14679277A JPS5479419A (en) 1977-12-07 1977-12-07 Lost power source detecting device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14679277A JPS5479419A (en) 1977-12-07 1977-12-07 Lost power source detecting device

Publications (1)

Publication Number Publication Date
JPS5479419A true JPS5479419A (en) 1979-06-25

Family

ID=15415633

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14679277A Pending JPS5479419A (en) 1977-12-07 1977-12-07 Lost power source detecting device

Country Status (1)

Country Link
JP (1) JPS5479419A (en)

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