JPS57189072A - Spark detector for current collector - Google Patents

Spark detector for current collector

Info

Publication number
JPS57189072A
JPS57189072A JP56073589A JP7358981A JPS57189072A JP S57189072 A JPS57189072 A JP S57189072A JP 56073589 A JP56073589 A JP 56073589A JP 7358981 A JP7358981 A JP 7358981A JP S57189072 A JPS57189072 A JP S57189072A
Authority
JP
Japan
Prior art keywords
conductor
current collector
detection conductor
current
feeding
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
JP56073589A
Other languages
Japanese (ja)
Inventor
Satoshi Tanisaka
Yoshihiro Michiguchi
Toshitaka Suzuki
Osamu Numata
Seiji Yamazaki
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 JP56073589A priority Critical patent/JPS57189072A/en
Publication of JPS57189072A publication Critical patent/JPS57189072A/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
    • G01R31/346—Testing of armature or field windings

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To shorten a detection conductor by eliminating the influence of an external noise radio wave by providing the detection conductor as a directional coupler closely along a feeding conductor which leads a current flowing a current collector. CONSTITUTION:A power source 1 supplies an energizing current to a rotator 2 with a current collector through a feeding conductor 3. For this purpose, a detection conductor 4 is installed closely in parallel to the feeding conductor 3 while insulated from it in terms of direct current. One terminal of the detection conductor 4 is grounded through a resistance 5 and the parallel area of the conductors 3 and 4 are covered with a shield 6. In the directional coupler 8 constituted as mentioned above, when a high frequency component is superposed upon the current flowing through the feeding conductor 3, a high frequency voltage is induced at the detection conductor 4. It is led out from a terminal 7 and amplified and detected, and the resulting voltage is compared with a reference voltage, thus outputting a binary-coded signal.
JP56073589A 1981-05-18 1981-05-18 Spark detector for current collector Pending JPS57189072A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56073589A JPS57189072A (en) 1981-05-18 1981-05-18 Spark detector for current collector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56073589A JPS57189072A (en) 1981-05-18 1981-05-18 Spark detector for current collector

Publications (1)

Publication Number Publication Date
JPS57189072A true JPS57189072A (en) 1982-11-20

Family

ID=13522644

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56073589A Pending JPS57189072A (en) 1981-05-18 1981-05-18 Spark detector for current collector

Country Status (1)

Country Link
JP (1) JPS57189072A (en)

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