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JPS5562374A - Method and device for rectification spark detection of direct current motor - Google Patents

Method and device for rectification spark detection of direct current motor

Info

Publication number
JPS5562374A
JPS5562374A JP13641778A JP13641778A JPS5562374A JP S5562374 A JPS5562374 A JP S5562374A JP 13641778 A JP13641778 A JP 13641778A JP 13641778 A JP13641778 A JP 13641778A JP S5562374 A JPS5562374 A JP S5562374A
Authority
JP
Japan
Prior art keywords
signal
rectification
high frequency
coil
spark
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
JP13641778A
Other languages
Japanese (ja)
Inventor
Toshio Toyoda
Masanori Ezaki
Katsumi Nakazono
Shigemitsu Oota
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.)
Nippon Steel Corp
Original Assignee
Nippon Steel 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 Nippon Steel Corp filed Critical Nippon Steel Corp
Priority to JP13641778A priority Critical patent/JPS5562374A/en
Publication of JPS5562374A publication Critical patent/JPS5562374A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Tests Of Circuit Breakers, Generators, And Electric Motors (AREA)

Abstract

PURPOSE:To secure a simple and accurate detection for occurrence of the rectification spark and thus prevent previously the accident occurrence by detecting the high frequency current piled on the load current via the resonance-type coil. CONSTITUTION:When rectification spark 4a takes place to the DC motor, the load current piled with high frequency current 4b caused by the spark flows to conductor 11. As a result, high frequency attenuation signal 4c of resonance frequency f0 is generated at primary coil 13 connected to the transformer via core 12. Then high frequency attenuation signal 4d is generated due to the mutual induction at the secondary coil 14 connected to the transformer via coil 13 and core 12. Signal 4d is then turned into signal 4e through rectification of diode 16. Then signal 4e is filtered through capacitor 17 and then drawn out in the form of the output signal.
JP13641778A 1978-11-06 1978-11-06 Method and device for rectification spark detection of direct current motor Pending JPS5562374A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13641778A JPS5562374A (en) 1978-11-06 1978-11-06 Method and device for rectification spark detection of direct current motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13641778A JPS5562374A (en) 1978-11-06 1978-11-06 Method and device for rectification spark detection of direct current motor

Publications (1)

Publication Number Publication Date
JPS5562374A true JPS5562374A (en) 1980-05-10

Family

ID=15174661

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13641778A Pending JPS5562374A (en) 1978-11-06 1978-11-06 Method and device for rectification spark detection of direct current motor

Country Status (1)

Country Link
JP (1) JPS5562374A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59216442A (en) * 1983-05-19 1984-12-06 Hitachi Ltd Rotary electric machine with commutator
JP2013090425A (en) * 2011-10-18 2013-05-13 Hitachi Ltd Abnormal wear diagnostic system and rotary electric machine using the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59216442A (en) * 1983-05-19 1984-12-06 Hitachi Ltd Rotary electric machine with commutator
JPH0477543B2 (en) * 1983-05-19 1992-12-08 Hitachi Ltd
JP2013090425A (en) * 2011-10-18 2013-05-13 Hitachi Ltd Abnormal wear diagnostic system and rotary electric machine using the same

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