GB969475A - Improvements in or relating to rotary electric machines - Google Patents
Improvements in or relating to rotary electric machinesInfo
- Publication number
- GB969475A GB969475A GB140060A GB140060A GB969475A GB 969475 A GB969475 A GB 969475A GB 140060 A GB140060 A GB 140060A GB 140060 A GB140060 A GB 140060A GB 969475 A GB969475 A GB 969475A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pole
- winding
- energized
- stator
- rotor
- 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)
- Synchronous Machinery (AREA)
Abstract
969,475. Dynamo-electric machines. NATIONAL RESEARCH DEVELOPMENT CORPORATION. Jan. 11, 1961 [Jan.' 14, 1960; June 7, 1960], Nos. 1400/60 and 19955/60. Heading H2A. In a polyphase machine whose stator and rotor are both energized, so that the machine runs synchronously at double frequency (generally called " induction " machines), the stator carries an additional winding of higher polenumber and energized at a higher frequency, and the rotor winding is arranged to act as a short-circuited winding in respect of this higher pole number for the purpose of damping and running-up. Figs. 1 and 2 show one phase (between star-point 9 and slip-ring connection 10) of a 4-pole rotor winding in which the coil groups 1, 2, 3, 4 act in series-parallel between the terminals 9 and 10, but in a closed series loop for the 8-pole energization induced by the additional stator field. The stator carries the normal three-phase, 4-pole winding, and an additional 8-pole winding in the same slots and energized at quadruple frequency (i.e. double the pole-number, and double frequency because of the double speed of the machine). A modification is described (Fig. 6, not shown) in which a single, centre-tapped stator winding is energized at both pole-numbers by means of centretapped transformer windings. In a modification in which the higher pole-number is a third instead of a second harmonic of the main supply, Fig. 10, the rotor 90 is arranged as a 2-pole, delta-connected, three-phase winding, and also as a 6-pole, series-connected, singlephase winding which is used for starting and damping by the use of a resistor 88 and shorting switch 89 respectively,
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB140060A GB969475A (en) | 1960-01-14 | 1960-01-14 | Improvements in or relating to rotary electric machines |
CH40561A CH376576A (en) | 1960-01-14 | 1961-01-13 | Installation comprising an alternating current rotary electric machine |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB140060A GB969475A (en) | 1960-01-14 | 1960-01-14 | Improvements in or relating to rotary electric machines |
Publications (1)
Publication Number | Publication Date |
---|---|
GB969475A true GB969475A (en) | 1964-09-09 |
Family
ID=9721343
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB140060A Expired GB969475A (en) | 1960-01-14 | 1960-01-14 | Improvements in or relating to rotary electric machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB969475A (en) |
-
1960
- 1960-01-14 GB GB140060A patent/GB969475A/en not_active Expired
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