GB1023614A - Improvements in or relating to rotary electric machines - Google Patents
Improvements in or relating to rotary electric machinesInfo
- Publication number
- GB1023614A GB1023614A GB4628163A GB4628163A GB1023614A GB 1023614 A GB1023614 A GB 1023614A GB 4628163 A GB4628163 A GB 4628163A GB 4628163 A GB4628163 A GB 4628163A GB 1023614 A GB1023614 A GB 1023614A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rotor
- pole
- stator
- phase
- winding
- 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
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/28—Layout of windings or of connections between windings
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Stepping Motors (AREA)
Abstract
1,023,614. Winding layouts for dynamoelectric machines. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Nov. 17, 1964 [Nov. 22, 1963], No. 46281/63. Heading H2A. A three-phase motor has pole-changing by pole-amplitude modulation applied to both stator and rotor windings. The modulation may be effected by bringing out switchable connections from both stator and rotor, or one or both of these may be wound so that it presents a short-circuit to one of the pole-numbers. When both are switched, the stator and rotor are brought out to six terminals, the rotor through slip-rings, additional speed control being provided by rotor rheostats in the usual way. Since the rotor is connected to six slip-rings, its winding may be connected in three-phase or six-phase manner to the resistance. In the latter case no rotor switching is required. In an alternative arrangement which avoids rotor switching, the rotor windings are connected in parallel-star (Fig. 3b, not shown), brought out over three slip-rings to a rheostat. At the lower pole-number this connection is operative, but at the higher pole-number each phase is internally short-circuited, thus dispensing with resistive control. This principle of using parallel windings to produce an internal short-circuit at one pole-number may be applied to both stator and rotor windings (Fig. 4, not shown), one winding providing the higher pole-number by parallel operation of its phase-winding parts, and the other winding providing the lower in parallel operation. Either the stator or the rotor windings may be energized to give one pole-number or the other, the de-energized member being effectively internally shortcircuited. As a modification of this arrangement, the corresponding phases of the stator and rotor windings are connected in series, each individual phase winding being connected in parallel-star as before. The relative energization of the stator and rotor windings is determined by a three-phase auto-transformer so as to produce a speed graded from one polenumber to the other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4628163A GB1023614A (en) | 1963-11-22 | 1963-11-22 | Improvements in or relating to rotary electric machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB4628163A GB1023614A (en) | 1963-11-22 | 1963-11-22 | Improvements in or relating to rotary electric machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1023614A true GB1023614A (en) | 1966-03-23 |
Family
ID=10440597
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4628163A Expired GB1023614A (en) | 1963-11-22 | 1963-11-22 | Improvements in or relating to rotary electric machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1023614A (en) |
-
1963
- 1963-11-22 GB GB4628163A patent/GB1023614A/en not_active Expired
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