GB940233A - Dynamo-electric machines - Google Patents
Dynamo-electric machinesInfo
- Publication number
- GB940233A GB940233A GB708661A GB708661A GB940233A GB 940233 A GB940233 A GB 940233A GB 708661 A GB708661 A GB 708661A GB 708661 A GB708661 A GB 708661A GB 940233 A GB940233 A GB 940233A
- Authority
- GB
- United Kingdom
- Prior art keywords
- machine
- laminμ
- projecting
- dynamo
- jarret
- 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
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
- H02K1/246—Variable reluctance rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/02—Synchronous motors
- H02K19/04—Synchronous motors for single-phase current
- H02K19/06—Motors having windings on the stator and a variable-reluctance soft-iron rotor without windings, e.g. inductor motors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K19/00—Synchronous motors or generators
- H02K19/16—Synchronous generators
- H02K19/22—Synchronous generators having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators
- H02K19/24—Synchronous generators having windings each turn of which co-operates alternately with poles of opposite polarity, e.g. heteropolar generators with variable-reluctance soft-iron rotors without winding
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Synchronous Machinery (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
940,233. Dynamo-electric machines. J. JARRET, and J. JARRET. Feb. 27, 1961 [Feb. 29, 1960], No. 7086/61. Heading H2A. In a dynamo-electric machine, for example an inductor alternator or a synchronous motor the rotor comprises alternate projecting laminµ 2 (Fig. 2) of high purity iron separated by silicon steel spacers 10, the projecting laminµ 2 being magnetically saturated in use at a value of magnetizing field much lower than that at which the other magnetic parts of the machine are saturated. The Specification alleges that since the maximum torque of a machine is dependent on the amplitude of the flux variation (from a maximum when the rotor and stator teeth are aligned to a minimum when they are out of register) the use of high purity iron projections reduces hysteresis losses, thus allowing a greater field excitation to be used and thus increasing the efficiency of the machine. The description explains with reference to a bipolar synchronous motor (Fig. 2, not shown) how to calculate the ratio of the thickness of the projecting laminµ to the thickness of the spacers. A 4-pole alternator (Fig. 3) embodying the principle of the invention has stator windings 14a, 14b, 14c, 14d interconnected to form an impedance bridge with a D.C. source 17 connected across one diagonal and an A.C. output taken across the other. The invention may also be applied to reciprocating machines.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR819923A FR1258306A (en) | 1960-02-29 | 1960-02-29 | Improvements made to electric machines of the variable reluctance type |
Publications (1)
Publication Number | Publication Date |
---|---|
GB940233A true GB940233A (en) | 1963-10-30 |
Family
ID=8726039
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB708661A Expired GB940233A (en) | 1960-02-29 | 1961-02-27 | Dynamo-electric machines |
Country Status (4)
Country | Link |
---|---|
BE (1) | BE600687A (en) |
CH (1) | CH373098A (en) |
FR (1) | FR1258306A (en) |
GB (1) | GB940233A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2149587A (en) * | 1983-09-29 | 1985-06-12 | Okuma Machinery Works Ltd | Synchronous motors and control units thereof |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH413084A (en) * | 1962-02-05 | 1966-05-15 | Jarret Jean | Electric variable reluctance machine |
FR2541832B1 (en) * | 1983-02-28 | 1985-06-07 | Alsthom Atlantique | ROTATING COMPENSATOR |
JPH10108437A (en) * | 1996-09-30 | 1998-04-24 | Aisin Seiki Co Ltd | Switched reluctance motor |
-
1960
- 1960-02-29 FR FR819923A patent/FR1258306A/en not_active Expired
-
1961
- 1961-02-27 CH CH235361A patent/CH373098A/en unknown
- 1961-02-27 BE BE600687A patent/BE600687A/en unknown
- 1961-02-27 GB GB708661A patent/GB940233A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2149587A (en) * | 1983-09-29 | 1985-06-12 | Okuma Machinery Works Ltd | Synchronous motors and control units thereof |
Also Published As
Publication number | Publication date |
---|---|
BE600687A (en) | 1961-06-16 |
FR1258306A (en) | 1961-04-14 |
CH373098A (en) | 1963-11-15 |
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