GB235897A - Improvements in induction motors - Google Patents

Improvements in induction motors

Info

Publication number
GB235897A
GB235897A GB15786/25A GB1578625A GB235897A GB 235897 A GB235897 A GB 235897A GB 15786/25 A GB15786/25 A GB 15786/25A GB 1578625 A GB1578625 A GB 1578625A GB 235897 A GB235897 A GB 235897A
Authority
GB
United Kingdom
Prior art keywords
flux
disc
coils
motor
vertical component
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
GB15786/25A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB235897A publication Critical patent/GB235897A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K17/00—Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02—Asynchronous induction motors
    • H02K17/04—Asynchronous induction motors for single phase current
    • H02K17/10—Motors with auxiliary phase obtained by split-pole carrying short-circuited windings

Abstract

235,897. British Thomson-Houston Co., Ltd., (Assignees of Hall, C. I.). June 20, 1924, [Convention date]. Alternating-current motors; field magnets; polepieces; casings.-An induction motor is provided with a number of separate shading-coils arranged one within the other and enclosing different areas of the pole faces so as to give a progressive shift to the flux in the air-gap. Magnetic shunts are provided to reduce the vertical component of flux threading the disc. Increased torque is thus produced and humming is reduced. As shown applied to a gramophone motor, field coils 25 are mounted on hollow cores 12 integral with a skeleton casting 10, the cores being provided with grooves 27 in which are located a number of shading-coils 26 defining pole regions A - - D producing a progressive flux shift across a disc rotor. The vertical component of flux threading the disc is reduced by magnetic shunts 28 keyed to the pole regions D. The co-operating pole faces 24 are mounted upon a skeleton casting 11, the castings 10, 11 fitting together by screws and forming a box-like enclosure for the motor. Specification 229,898 is referred to.
GB15786/25A 1924-06-20 1925-06-18 Improvements in induction motors Expired GB235897A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US235897XA 1924-06-20 1924-06-20

Publications (1)

Publication Number Publication Date
GB235897A true GB235897A (en) 1925-11-26

Family

ID=21816058

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15786/25A Expired GB235897A (en) 1924-06-20 1925-06-18 Improvements in induction motors

Country Status (1)

Country Link
GB (1) GB235897A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739500C (en) * 1939-06-29 1943-09-27 Elek Scher App Sprecher & Schu Ferraris time motor with low power consumption for independent overcurrent relays
DE1055678B (en) * 1953-07-03 1959-04-23 Philips Nv Stator for a shaded pole single-phase induction motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE739500C (en) * 1939-06-29 1943-09-27 Elek Scher App Sprecher & Schu Ferraris time motor with low power consumption for independent overcurrent relays
DE1055678B (en) * 1953-07-03 1959-04-23 Philips Nv Stator for a shaded pole single-phase induction motor

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