GB1522836A - Electrical machine with thermal overload protection - Google Patents

Electrical machine with thermal overload protection

Info

Publication number
GB1522836A
GB1522836A GB3559875A GB3559875A GB1522836A GB 1522836 A GB1522836 A GB 1522836A GB 3559875 A GB3559875 A GB 3559875A GB 3559875 A GB3559875 A GB 3559875A GB 1522836 A GB1522836 A GB 1522836A
Authority
GB
United Kingdom
Prior art keywords
temperature
rotor
stator
electrical machine
monitoring
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
GB3559875A
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.)
Alstom SA
Original Assignee
Unelec SA
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 Unelec SA filed Critical Unelec SA
Publication of GB1522836A publication Critical patent/GB1522836A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor

Abstract

1522836 Monitoring temperature of dynamoelectric machines UNELEC 28 Aug 1975 [2 Sept 1974] 35598/75 Headings H2K and H2A An arrangement for monitoring the temperature of the rotor of an electrical machine comprises one or more first temperature-sensitive elements 11 mounted on the stator but positioned so as to sense radiation from the rotor 25, and a second, compensating, temperature-sensitive element 13 also mounted on the stator but responsive only to the ambient temperature in the vicinity of the rotor. The first elements 11 may be painted black and mounted on a heatreflecting aluminium sheet supported by an insulating ring 23 inside the stator end windings 21 so as to face a squirrel cage end ring 24. The second element is carried by a projection from the insulating ring 23 and positioned axially beyond the rotor. The temperature-sensitive elements may be thermocouples, but preferably they comprise positive- and negative-temperature coefficient resistors connected (Fig. 4) in series with a fixed resistor 12 across a voltage source. When the difference between rotor temperature and ambient temperature reaches a predetermined amount a circuit 16 is triggered to de-energize a main relay or triac 2 via SCR 8 and reed relay 5, and to insert an extra resistance 15 in the series network so that the circuit will not reset until the temperature difference has fallen to a lower level.
GB3559875A 1974-09-02 1975-08-28 Electrical machine with thermal overload protection Expired GB1522836A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7429833A FR2283570A1 (en) 1974-09-02 1974-09-02 THERMAL PROTECTION DEVICE

Publications (1)

Publication Number Publication Date
GB1522836A true GB1522836A (en) 1978-08-31

Family

ID=9142739

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3559875A Expired GB1522836A (en) 1974-09-02 1975-08-28 Electrical machine with thermal overload protection

Country Status (7)

Country Link
BE (1) BE832419A (en)
BR (1) BR7505580A (en)
CH (1) CH600642A5 (en)
DE (1) DE2537950A1 (en)
FR (1) FR2283570A1 (en)
GB (1) GB1522836A (en)
IT (1) IT1042217B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61185231U (en) * 1985-05-04 1986-11-19
GB2223363A (en) * 1988-08-31 1990-04-04 Mabuchi Motor Co Miniature motor with positive-coefficient thermistor mounted on rotating structure
CN113364221A (en) * 2021-06-23 2021-09-07 珠海格力电器股份有限公司 Motor rotor temperature detection system and motor comprising same

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0019012A1 (en) * 1979-05-18 1980-11-26 Philips Kommunikations Industrie AG Protection device with two temperature monitoring circuits for electric machines
US4405558A (en) * 1980-10-15 1983-09-20 Westinghouse Electric Corp. Nuclear reactor shutdown system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2044917A5 (en) * 1969-02-28 1971-02-26 Pretnar Jozef
JPS4731241Y1 (en) * 1969-12-16 1972-09-19
FR2096641B2 (en) * 1970-03-10 1973-10-19 Comp Generale Electricite
US3651379A (en) * 1970-10-30 1972-03-21 Motorola Inc Temperature responsive circuit for protecting an electron device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61185231U (en) * 1985-05-04 1986-11-19
GB2223363A (en) * 1988-08-31 1990-04-04 Mabuchi Motor Co Miniature motor with positive-coefficient thermistor mounted on rotating structure
GB2223363B (en) * 1988-08-31 1993-03-17 Mabuchi Motor Co Miniature motor with positive-coefficient thermistor element
CN113364221A (en) * 2021-06-23 2021-09-07 珠海格力电器股份有限公司 Motor rotor temperature detection system and motor comprising same
CN113364221B (en) * 2021-06-23 2022-07-26 珠海格力电器股份有限公司 Motor rotor temperature detection system and motor comprising same

Also Published As

Publication number Publication date
BR7505580A (en) 1976-08-03
DE2537950A1 (en) 1976-03-11
FR2283570A1 (en) 1976-03-26
BE832419A (en) 1976-02-16
CH600642A5 (en) 1978-06-30
IT1042217B (en) 1980-01-30
FR2283570B1 (en) 1979-06-01

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee