JPS56110461A - Overheating detector of electric rotary machine - Google Patents

Overheating detector of electric rotary machine

Info

Publication number
JPS56110461A
JPS56110461A JP1008580A JP1008580A JPS56110461A JP S56110461 A JPS56110461 A JP S56110461A JP 1008580 A JP1008580 A JP 1008580A JP 1008580 A JP1008580 A JP 1008580A JP S56110461 A JPS56110461 A JP S56110461A
Authority
JP
Japan
Prior art keywords
cooling gas
rotary machine
discharge current
electric rotary
discharge
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.)
Granted
Application number
JP1008580A
Other languages
Japanese (ja)
Other versions
JPS6040258B2 (en
Inventor
Kiyoshi Narato
Keizo Otsuka
Shoichi Sawahata
Sadahiko Niwa
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
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP55010085A priority Critical patent/JPS6040258B2/en
Publication of JPS56110461A publication Critical patent/JPS56110461A/en
Publication of JPS6040258B2 publication Critical patent/JPS6040258B2/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/24—Protection against failure of cooling arrangements, e.g. due to loss of cooling medium or due to interruption of the circulation of cooling medium

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

PURPOSE:To miniaturize an overheating detector and to simplify handling and maintenance by a method wherein a pair of discharge electrodes are provided in a bleeding pipe of cooling gas, and the decrease of discharge current due to the increase of concentration of varnish corpuscles being contained in the cooling gas is utilized. CONSTITUTION:The discharge electrodes 7 are equipped on the way of the bleeding pipe 20 to take out a part of cooling gas and are connected to a high voltage source 30, and discharge current detecting electrodes 18 are provided confronting with the discharge electrodes 7 and are connected to a motor-driven indicator 4. The corpuscles produced by the thermal decomposition of insulating varnish caused in accordance with the temperature rise of the electric rotary machine are contained in the cooling gas P passing through the bleeding pipe 20. Because the discharge current decreases in accordance with the increase of concentration of corpuscle, so that the overheating of the electric rotary machine can be detected by observing the discharge current.
JP55010085A 1980-02-01 1980-02-01 Overheat detection device for rotating electrical machines Expired JPS6040258B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55010085A JPS6040258B2 (en) 1980-02-01 1980-02-01 Overheat detection device for rotating electrical machines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55010085A JPS6040258B2 (en) 1980-02-01 1980-02-01 Overheat detection device for rotating electrical machines

Publications (2)

Publication Number Publication Date
JPS56110461A true JPS56110461A (en) 1981-09-01
JPS6040258B2 JPS6040258B2 (en) 1985-09-10

Family

ID=11740495

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55010085A Expired JPS6040258B2 (en) 1980-02-01 1980-02-01 Overheat detection device for rotating electrical machines

Country Status (1)

Country Link
JP (1) JPS6040258B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05340922A (en) * 1992-06-05 1993-12-24 Hitachi Ltd Overheat diagnosis device for rotating electric machine
JP2014055820A (en) * 2012-09-12 2014-03-27 Hino Motors Ltd Particulate sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05340922A (en) * 1992-06-05 1993-12-24 Hitachi Ltd Overheat diagnosis device for rotating electric machine
JP2014055820A (en) * 2012-09-12 2014-03-27 Hino Motors Ltd Particulate sensor

Also Published As

Publication number Publication date
JPS6040258B2 (en) 1985-09-10

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