GB845394A - Improvements in or relating to self-starting fractional horse-power synchronous motors - Google Patents

Improvements in or relating to self-starting fractional horse-power synchronous motors

Info

Publication number
GB845394A
GB845394A GB33270/58A GB3327058A GB845394A GB 845394 A GB845394 A GB 845394A GB 33270/58 A GB33270/58 A GB 33270/58A GB 3327058 A GB3327058 A GB 3327058A GB 845394 A GB845394 A GB 845394A
Authority
GB
United Kingdom
Prior art keywords
magnet
rotor
pole
teeth
stator
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
GB33270/58A
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.)
Landis and Gyr AG
Original Assignee
Landis and Gyr AG
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 Landis and Gyr AG filed Critical Landis and Gyr AG
Publication of GB845394A publication Critical patent/GB845394A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary

Abstract

845,394. Electric motors. LANDIS & GYR A.G. Oct. 17, 1958 [Oct. 23, 1957], No. 33270/58. Class 35. The soft iron rotor of a synchronous motor has a series of radial teeth 2 polarized by a fixed, disc-shaped magnet 12 which is axially magnetized to provide twice as many sector-shaped alternate poles as there are rotor teeth. The 'stator has no teeth. In operation the magnet poles are alternately strengthened and weakened by the alternating flux from stator coil 11, but the magnet is of a ferrite (Ferroxdure) having a reversible permeability of about unity and is not demagnetized by the stator flux. When the motor is de-energized the 8-pole rotor lies in a position bridging alternate pairs of the 16-pole magnet as shown in Fig. 2. On energization, one pole of each pair is weakened and the other strengthened which causes the rotor to move towards the stronger pole. Reverse rotation is prevented by a known lock comprising a gear 13 on the rotor engaging, by specially shaped teeth, a gear 15 lying in an aperture in the magnet.
GB33270/58A 1957-10-23 1958-10-17 Improvements in or relating to self-starting fractional horse-power synchronous motors Expired GB845394A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH845394X 1957-10-23

Publications (1)

Publication Number Publication Date
GB845394A true GB845394A (en) 1960-08-24

Family

ID=4541765

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33270/58A Expired GB845394A (en) 1957-10-23 1958-10-17 Improvements in or relating to self-starting fractional horse-power synchronous motors

Country Status (1)

Country Link
GB (1) GB845394A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056521A2 (en) * 1981-01-15 1982-07-28 Horstmann Gear Group Limited Electric motor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0056521A2 (en) * 1981-01-15 1982-07-28 Horstmann Gear Group Limited Electric motor
EP0056521A3 (en) * 1981-01-15 1983-01-26 Horstmann Gear Group Limited Electric motor

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