ES2011180A6 - Core monitor of rotary electric machine - Google Patents

Core monitor of rotary electric machine

Info

Publication number
ES2011180A6
ES2011180A6 ES8803294A ES8803294A ES2011180A6 ES 2011180 A6 ES2011180 A6 ES 2011180A6 ES 8803294 A ES8803294 A ES 8803294A ES 8803294 A ES8803294 A ES 8803294A ES 2011180 A6 ES2011180 A6 ES 2011180A6
Authority
ES
Spain
Prior art keywords
voltage
difference
rotor shaft
brushes
electric machine
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.)
Expired
Application number
ES8803294A
Other languages
Spanish (es)
Inventor
Robert Charles Miller
Michael Twerdochlib
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.)
CBS Corp
Original Assignee
Westinghouse Electric 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 Westinghouse Electric Corp filed Critical Westinghouse Electric Corp
Publication of ES2011180A6 publication Critical patent/ES2011180A6/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means

Abstract

PURPOSE: To detect impairment of an insulator with high reliability before considerable impairment occurs in a core of a rotating electric machine, by detecting a difference in voltage between adjacent parts of first and second shaft brushes and a frame. CONSTITUTION: A difference in a rotor shaft voltage between end parts 16 and 18 of a rotor shaft is measured by using spring biased shaft brushes 20 and 22. High impedance isolation differential amplifiers 24 and 26 are connected to the brushes 20 and 22 respectively. A differential amplifier 28 generates a difference in the rotor shaft voltage between the end parts 16 and 18 of the rotor shaft. This differential voltage is inputted to a computer 32 through the intermediary of an A/D converter 30. This computer 32 makes an alarm generated when a difference between the differential voltage at the present time point and that at the previous time point exceeds a prescribed value.
ES8803294A 1987-10-29 1988-10-28 Core monitor of rotary electric machine Expired ES2011180A6 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11432887A 1987-10-29 1987-10-29

Publications (1)

Publication Number Publication Date
ES2011180A6 true ES2011180A6 (en) 1989-12-16

Family

ID=22354583

Family Applications (1)

Application Number Title Priority Date Filing Date
ES8803294A Expired ES2011180A6 (en) 1987-10-29 1988-10-28 Core monitor of rotary electric machine

Country Status (5)

Country Link
JP (1) JPH01144343A (en)
KR (1) KR890007054A (en)
CN (1) CN1013152B (en)
ES (1) ES2011180A6 (en)
IT (1) IT1225879B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10126168A1 (en) * 2001-05-30 2002-12-05 Kostal Leopold Gmbh & Co Kg Method for determining the frequency of the current ripples contained in the armature current signal of a commutated DC motor
CN105388377A (en) * 2015-11-09 2016-03-09 北京信息科技大学 Detection apparatus of stator iron core aging of old motor
CN112630650A (en) * 2020-11-11 2021-04-09 苏州热工研究院有限公司 Generator shaft voltage acquisition device and system

Also Published As

Publication number Publication date
CN1035179A (en) 1989-08-30
KR890007054A (en) 1989-06-17
JPH01144343A (en) 1989-06-06
IT8841700A0 (en) 1988-10-28
CN1013152B (en) 1991-07-10
IT1225879B (en) 1990-12-07

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Legal Events

Date Code Title Description
SA6 Expiration date (snapshot 920101)

Free format text: 2008-10-28

FD1A Patent lapsed

Effective date: 20001102