GB1353040A - Rotary device having a thermal overload detector - Google Patents

Rotary device having a thermal overload detector

Info

Publication number
GB1353040A
GB1353040A GB4592271A GB4592271A GB1353040A GB 1353040 A GB1353040 A GB 1353040A GB 4592271 A GB4592271 A GB 4592271A GB 4592271 A GB4592271 A GB 4592271A GB 1353040 A GB1353040 A GB 1353040A
Authority
GB
United Kingdom
Prior art keywords
magnetic
air gap
detector
motor
polepiece
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
GB4592271A
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 GB1353040A publication Critical patent/GB1353040A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/36—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils
    • G01K7/38—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using magnetic elements, e.g. magnets, coils the variations of temperature influencing the magnetic permeability
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/25—Devices for sensing temperature, or actuated thereby

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)

Abstract

1353040 Detecting thermal overloads in electric machines UNELEC 1 Oct 1971 [2 Oct 1970] 45922/71 Headings H2A and H2K [Also in Divisions H3 and G4] A rotary device, such as a rotatable electrical machine, e.g. electric motor, incorporates a thermal overload detector which comprises a magnetic member 5 carried on a rotatable part of the device and whose magnetic permeability varies with temperature and whose Curie temperature equals the overload temperature to be detected, a stationary magnetic bridge 6 which incorporates two polepieces 10, 11 separated by an air gap 12, and a magnetic field detector 13 disposed in the air gap, the member and bridge being so arranged that during each rotational cycle of the rotatable part the member 5 consecutively passes one polepiece 10, the air gap 12, and the other polepiece 11. The member 5 may be carried by a coil head of a wire-wound rotor, a synchronous motor inductor, a D.C. motor commutator segment or, as shown, the short-circuiting ring 4 of a squirrel cage winding. The polepieces may be electromagnetic or permanently magnetic, and the detector may be a Hall effect device or a magneto resistor, for actuating an alarm or a motor supply circuit breaker.
GB4592271A 1970-10-02 1971-10-01 Rotary device having a thermal overload detector Expired GB1353040A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7035745A FR2109135A5 (en) 1970-10-02 1970-10-02

Publications (1)

Publication Number Publication Date
GB1353040A true GB1353040A (en) 1974-05-15

Family

ID=9062217

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4592271A Expired GB1353040A (en) 1970-10-02 1971-10-01 Rotary device having a thermal overload detector

Country Status (8)

Country Link
JP (1) JPS5414513B1 (en)
BE (1) BE773219A (en)
DE (1) DE2148999C2 (en)
FR (1) FR2109135A5 (en)
GB (1) GB1353040A (en)
IT (1) IT939910B (en)
LU (1) LU63986A1 (en)
NL (1) NL7113395A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261518A (en) * 1991-11-15 1993-05-19 Heidelberger Druckmasch Ag Apparatus for measuring at least one state variable of a brushless direct-current motor
GB2261517A (en) * 1991-11-15 1993-05-19 Heidelberger Druckmasch Ag Apparatus for measuring at least one state variable of a rotating body

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5241521Y2 (en) * 1973-06-29 1977-09-20
IT1240370B (en) * 1990-04-30 1993-12-10 Fiat Auto Spa PROCEDURE FOR THE DETECTION OF THE MAXIMUM TEMPERATURE TO WHICH A MECHANICAL PIECE OF FERROMAGNETIC MATERIAL HAS BEEN SUBJECTED

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1573254A1 (en) * 1966-09-05 1970-03-26 Licentia Gmbh Temperature measuring device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2261518A (en) * 1991-11-15 1993-05-19 Heidelberger Druckmasch Ag Apparatus for measuring at least one state variable of a brushless direct-current motor
GB2261517A (en) * 1991-11-15 1993-05-19 Heidelberger Druckmasch Ag Apparatus for measuring at least one state variable of a rotating body
GB2261518B (en) * 1991-11-15 1995-03-01 Heidelberger Druckmasch Ag Apparatus for measuring at least one state variable of a brushless direct-current motor
US5418451A (en) * 1991-11-15 1995-05-23 Heidelberger Druckmaschinen Ag Apparatus for measuring at least one state variable of a brushless direct-current motor

Also Published As

Publication number Publication date
FR2109135A5 (en) 1972-05-26
DE2148999C2 (en) 1982-04-01
NL7113395A (en) 1972-04-05
DE2148999A1 (en) 1972-04-06
IT939910B (en) 1973-02-10
JPS5414513B1 (en) 1979-06-07
LU63986A1 (en) 1976-09-28
BE773219A (en) 1972-03-29

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Legal Events

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