GB788046A - Improvements in thermally protected multispeed electric motors of the single phase alternating current induction type - Google Patents

Improvements in thermally protected multispeed electric motors of the single phase alternating current induction type

Info

Publication number
GB788046A
GB788046A GB17971/56A GB1797156A GB788046A GB 788046 A GB788046 A GB 788046A GB 17971/56 A GB17971/56 A GB 17971/56A GB 1797156 A GB1797156 A GB 1797156A GB 788046 A GB788046 A GB 788046A
Authority
GB
United Kingdom
Prior art keywords
winding
windings
motor
series
thermally protected
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
GB17971/56A
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB788046A publication Critical patent/GB788046A/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

Landscapes

  • Control Of Ac Motors In General (AREA)
  • Control Of Multiple Motors (AREA)
  • Protection Of Generators And Motors (AREA)

Abstract

788,046. Control of A.C. motors. GENERAL ELECTRIC CO. June 11, 1956 [June 10, 1955], No. 17971/56. Class 38 (3). [Also in Group XXXV] A single-phase induction motor has a squirrelcage rotor, an auxiliary field winding 5, and a main winding with two sections 6, 7. Conductors extend from the motor windings to external terminals 20 . . . 23, a capacitor 24 being connected in series with the auxiliary winding 5. A temperature-responsive safety switch 14 is connectible in series between the winding 7 and the parallel-connected windings 5, 6. When switch arm 29 engages terminal 22, current flows through the elements 5, 6, and 14, so that both of the motor windings in use are thermally protected. If a lower speed is desired, the switch arm 29 is moved into engagement with terminal 23 whereby the winding 7 is introduced in series with the windings 5, 6. As before, the thermal switch affords protection for all the motor windings connected to the source of power. If operation at additional speeds are desired, additional sections may be added in the same manner as main winding section 7. The auxiliary winding and the capacitor may be disconnected when the motor reaches full speed.
GB17971/56A 1955-06-10 1956-06-11 Improvements in thermally protected multispeed electric motors of the single phase alternating current induction type Expired GB788046A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US788046XA 1955-06-10 1955-06-10

Publications (1)

Publication Number Publication Date
GB788046A true GB788046A (en) 1957-12-18

Family

ID=22146321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB17971/56A Expired GB788046A (en) 1955-06-10 1956-06-11 Improvements in thermally protected multispeed electric motors of the single phase alternating current induction type

Country Status (1)

Country Link
GB (1) GB788046A (en)

Similar Documents

Publication Publication Date Title
GB967057A (en) Winding arrangements for dynamoelectric machines
GB788046A (en) Improvements in thermally protected multispeed electric motors of the single phase alternating current induction type
GB764758A (en) Improvements in and relating to the protection of multi-speed electric motors
GB1358742A (en) Electrical motors
GB1169481A (en) Improvements in Single Phase Alternating Current Multi-Voltage Induction Motor Stator.
GB800207A (en) Improvements in or relating to starting systems for electric motors
US2735974A (en) Multispeed electric motor protective
GB934671A (en) Improvements in or relating to electric motors
JPS561796A (en) Motor
GB1020651A (en) Improvements in and relating to synchronous dynamo-electric machines
GB740136A (en) Improvements in or relating to electric motors
GB1309034A (en) Variable speed drive arrangements
GB868763A (en) Improvements in or relating to control arrangements for slip-ring induction motors
GB991760A (en) Improvements relating to the control of dynamo-electric machines
ES247502A2 (en) A driving system that comprises at least two asynchronous induction drive motors with ringing rings (Machine-translation by Google Translate, not legally binding)
GB1502366A (en) Singlephase induction motor
GB888505A (en) Improvements in and relating to electrical-motor-driven pump units and their application to the cooling of electrical switchgear
GB632468A (en) Improvements in or relating to single-phase induction motors
GB922067A (en) Improvements in and relating to electric motors
ES410087A1 (en) Improvements in overload switch systems for three-phase induction engines. (Machine-translation by Google Translate, not legally binding)
GB700258A (en) Improvements in control systems for single-phase asynchronous motors
GB672752A (en) Improvements in the protection of delta-wound electric motors
GB745894A (en) Improvements in or relating to alternating current electric motors
GB999530A (en) Suprasynchronous motor
GB845995A (en) Improvements in control systems for electric motors