GB940997A - Improvements in or relating to electric motors - Google Patents
Improvements in or relating to electric motorsInfo
- Publication number
- GB940997A GB940997A GB4171559A GB4171559A GB940997A GB 940997 A GB940997 A GB 940997A GB 4171559 A GB4171559 A GB 4171559A GB 4171559 A GB4171559 A GB 4171559A GB 940997 A GB940997 A GB 940997A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slots
- rotor
- magnetic
- arcuate
- barriers
- 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
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/14—Synchronous motors having additional short-circuited windings for starting as asynchronous motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
940,997. Squirrel cage constructions; core constructions. LOUIS ALLIS CO. Dec. 8, 1959, No. 41715/59. Heading H2A. In a salient pole synchronous induction motor magnetic " barriers " formed in the circular rotor laminations reduce crossaxis flux, i.e. flux that enters or leaves the rotor other than through the poles. The " barriers " are interruptions in the core which may be filled with non- magnetic metal, e.g. aluminium cast with the conductor bars. The conductor bars 14 of a squirrel-cage rotor are located in slots provided in the laminated magnetic core 12 which is fixed to a magnetic shaft 13. Six salient poles 17 are symmetrically spaced round the rotor by peripheral interruptions 18, the arcuate length of which is between 20% and 40% the arcuate distance between adjacent polar axes 28. The peripheral interruptions 18 which may also be filled with non-magnetic metal, are shallower than the winding slots 16 and are flat to enable the use of the same punching tool for different sized rotors. "Barriers" 21 are arranged so that there are three distinct low reluctance flux paths linking adjacent poles; an inner path 22 which includes the ferromagnetic shaft 13; an intermediate path 23<SP>1</SP> ; and an outer path 23. The inner barrier 21a has two radial legs 24 connected by an arcuate segment 25, whilst the outer barrier 21b is arcuate as shown and is spaced from the bottom of the oonductor slots 16 by a neck 26 of ferromagnetic material which saturates at a low percentage of the maximum flux. In larger machines additional strength is provided by a few non-magnetic, e.g. stainless steel, laminations 30 with holes 31 to allow the molten metal to fill all the slots (Fig. 3). In a further embodiment, the mechanical strength is improved by replacing the continuous slots with smaller slots of the same configuration (Figs. 4 and 5, not shown). In another embodiment, the inner " barriers " having radial legs are shaped so that the cast metal keys with the slot edge to resist the centrifugal force acting on the rotor (Fig. 6, not shown). The same punching tool may be used to make the barrier slots for rotors having different numbers of poles, the slots comprising radial and arcuate parts (Figs. 8, 9, not shown). Specification 771,669 and U.S.A. Specification 2,769,108 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4171559A GB940997A (en) | 1959-12-08 | 1959-12-08 | Improvements in or relating to electric motors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4171559A GB940997A (en) | 1959-12-08 | 1959-12-08 | Improvements in or relating to electric motors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB940997A true GB940997A (en) | 1963-11-06 |
Family
ID=10421026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4171559A Expired GB940997A (en) | 1959-12-08 | 1959-12-08 | Improvements in or relating to electric motors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB940997A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2310544A (en) * | 1996-02-21 | 1997-08-27 | Switched Reluctance Drives Ltd | Method of forming a rotor for a reluctance machine |
GB2417613A (en) * | 2004-08-26 | 2006-03-01 | Lg Electronics Inc | A PMA synchronous reluctance machine rotor arranged for in situ magnetization of the permanent magnet elements. |
WO2008037849A1 (en) | 2006-09-27 | 2008-04-03 | Abb Oy | Rotor for electric machine |
WO2008111775A2 (en) * | 2007-03-09 | 2008-09-18 | Lg Electronics Inc. | Motor and the compressor including the same |
WO2008111776A2 (en) * | 2007-03-09 | 2008-09-18 | Lg Electronics Inc. | Motor and the compressor including the same |
EP3082224A1 (en) * | 2015-04-01 | 2016-10-19 | General Electric Company | System and method for supporting laminations of synchronous reluctance motors |
EP3413439A1 (en) * | 2017-06-08 | 2018-12-12 | Industrial Technology Research Institute | Rotor mechanism |
CN109951111A (en) * | 2017-12-20 | 2019-06-28 | 财团法人工业技术研究院 | Driving method |
WO2022242901A1 (en) * | 2021-05-19 | 2022-11-24 | Sew-Eurodrive Gmbh & Co. Kg | Electric motor having rotor shaft and laminated core |
-
1959
- 1959-12-08 GB GB4171559A patent/GB940997A/en not_active Expired
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5893205A (en) * | 1996-02-21 | 1999-04-13 | Switched Reluctance Drives Limited | Rotor for a reluctance machine, and method of making |
GB2310544B (en) * | 1996-02-21 | 2000-03-29 | Switched Reluctance Drives Ltd | Method of forming a rotor for a reluctance machine |
GB2310544A (en) * | 1996-02-21 | 1997-08-27 | Switched Reluctance Drives Ltd | Method of forming a rotor for a reluctance machine |
US7459821B2 (en) | 2004-08-26 | 2008-12-02 | Lg Electronics Inc. | Permanent magnet assisted synRM and method for imposing magnetic force thereon |
GB2417613A (en) * | 2004-08-26 | 2006-03-01 | Lg Electronics Inc | A PMA synchronous reluctance machine rotor arranged for in situ magnetization of the permanent magnet elements. |
GB2417613B (en) * | 2004-08-26 | 2006-11-15 | Lg Electronics Inc | Permanent magnet assisted synchronous reluctance motor and method for imposing magnetic force thereon |
WO2008037849A1 (en) | 2006-09-27 | 2008-04-03 | Abb Oy | Rotor for electric machine |
US8026649B2 (en) | 2006-09-27 | 2011-09-27 | Abb Oy | Rotor for electric machine |
WO2008111775A2 (en) * | 2007-03-09 | 2008-09-18 | Lg Electronics Inc. | Motor and the compressor including the same |
CN102047531B (en) * | 2007-03-09 | 2013-04-03 | Lg电子株式会社 | Motor and the compressor including the same |
WO2008111776A3 (en) * | 2007-03-09 | 2011-01-20 | Lg Electronics Inc. | Electric motor |
CN102047531A (en) * | 2007-03-09 | 2011-05-04 | Lg电子株式会社 | Motor and the compressor including the same |
WO2008111776A2 (en) * | 2007-03-09 | 2008-09-18 | Lg Electronics Inc. | Motor and the compressor including the same |
US8067873B2 (en) | 2007-03-09 | 2011-11-29 | Lg Electronics Inc. | Motor and the compressor including the same |
US8072111B2 (en) | 2007-03-09 | 2011-12-06 | Lg Electronics Inc. | Motor and the compressor including the same |
WO2008111775A3 (en) * | 2007-03-09 | 2011-01-20 | Lg Electronics Inc. | Electric motor |
CN102017366B (en) * | 2007-03-09 | 2014-12-17 | Lg电子株式会社 | Motor and the compressor including the same |
EP3082224A1 (en) * | 2015-04-01 | 2016-10-19 | General Electric Company | System and method for supporting laminations of synchronous reluctance motors |
EP3413439A1 (en) * | 2017-06-08 | 2018-12-12 | Industrial Technology Research Institute | Rotor mechanism |
US20180358850A1 (en) * | 2017-06-08 | 2018-12-13 | Industrial Technology Research Institute | Rotor mechanism |
CN109038883A (en) * | 2017-06-08 | 2018-12-18 | 财团法人工业技术研究院 | Rotor mechanism |
US10742080B2 (en) | 2017-06-08 | 2020-08-11 | Industrial Technology Research Institute | Annular magnetic flux channel rotor mechanism |
CN109951111A (en) * | 2017-12-20 | 2019-06-28 | 财团法人工业技术研究院 | Driving method |
WO2022242901A1 (en) * | 2021-05-19 | 2022-11-24 | Sew-Eurodrive Gmbh & Co. Kg | Electric motor having rotor shaft and laminated core |
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