GB167242A - Improvements relating to dynamo electric machines adapted for synchronous working - Google Patents
Improvements relating to dynamo electric machines adapted for synchronous workingInfo
- Publication number
- GB167242A GB167242A GB1188020A GB1188020A GB167242A GB 167242 A GB167242 A GB 167242A GB 1188020 A GB1188020 A GB 1188020A GB 1188020 A GB1188020 A GB 1188020A GB 167242 A GB167242 A GB 167242A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pole
- winding
- poles
- continuous
- current
- 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
- H02K19/16—Synchronous generators
- H02K19/26—Synchronous generators characterised by the arrangement of exciting windings
- H02K19/32—Synchronous generators characterised by the arrangement of exciting windings for pole-changing
Abstract
167,242. Hunt, L. J., and Sandycroft, Ltd. April 29, 1920. Dynamos, regulating; motors, controlling; exciting; windings.-Relates to a dynamo-electric machine having stator windings adapted to operate with alternating current and to produce fields of two different pole-numbers, and having a rotor winding also adapted to provide fields of two different pole-numbers, the rotor winding being excited by continuous current at one or more speeds of operation. The rotor winding is of a type having six terminals and is arranged so that when continuous current is supplied to any pair of the terminals, the remaining terminals can be interconnected so as to provide local circuit paths through the coils for damping purposes and for maintaining synchronism. The rotor winding shown in Fig. 1 is wound to produce two or four poles and to give a cascade speed corresponding to six poles. The four-pole excitation is obtained by connecting the source of continuous current o to the slip-rings 1, 7. The damping- circuits are obtained by interconnecting the sliprings 3, 5, 9, 11 either in the manner shown in Fig. 1 or in the manner shown in Fig. 5. For the two-pole excitation, one terminal of the continuous-current source is connected to the sliprings 1, 7 and the other terminal to the sliprings 3, 5, 9, 11. The stator may be provided with two windings wound for four poles and two poles respectively, the two-pole winding being excited by continuous current when the machine is to operate as a synchronous six-pole (cascade) motor. If the machine is required to operate at the speeds corresponding to the two basic polenumbers only, the stator winding is preferably arranged so that it can be connected up as parallel-mesh winding for the two-pole speed as shown in Fig. 12, and as a parallel-star winding for the four-pole speed as shown in Fig. 11. In Fig. 13 are shown the circuits and controllers v, w for a motor adapted to operate at the three synchronous speeds corresponding to six poles, four poles, and two poles. Resistances 34, 35, 36, 37 are used for starting purposes as described in Specification 124,018. The motor is started a.; an induction motor with the opposite terminals of the rotor winding connected together through the resistances 34, 35, 36, 37, and run up to the synchronous speed by shifting the brushes 16, 13, 17, 14, 18, 15 so as gradually to cut out the, resistances. For the six-pole synchronous speed, the continuous-current generator is connected across the stator two-pole winding a, b, c and the slip-rings 3. 7, 11 are short-circuited, the four-pole stator winding d, e, f being supplied with alternating current. For four-pole synchronous operation the connections of the rotor winding are those shown in Fig. 5, the continuous-current generator o being connected to the slip-rings 1, 7 through the contacts k, l. For two-pole synchronous operation the terminal h of the generator o is connected to the slip-rings 1, 7 and the terminal g to the slip-rings 3, 5, 9, 11 through the connections n, m and brushes 16, 13, 17, 14. Specifications 8403/04, 16170/09, 9261/13, 24837/14, 24838/14, 15113/15, and 124,018 are referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1188020A GB167242A (en) | 1920-04-29 | 1920-04-29 | Improvements relating to dynamo electric machines adapted for synchronous working |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1188020A GB167242A (en) | 1920-04-29 | 1920-04-29 | Improvements relating to dynamo electric machines adapted for synchronous working |
Publications (1)
Publication Number | Publication Date |
---|---|
GB167242A true GB167242A (en) | 1921-07-29 |
Family
ID=9994348
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1188020A Expired GB167242A (en) | 1920-04-29 | 1920-04-29 | Improvements relating to dynamo electric machines adapted for synchronous working |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB167242A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985000078A1 (en) * | 1983-06-15 | 1985-01-03 | Associated Electrical Industries Limited | Multipolar excitation systems |
-
1920
- 1920-04-29 GB GB1188020A patent/GB167242A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1985000078A1 (en) * | 1983-06-15 | 1985-01-03 | Associated Electrical Industries Limited | Multipolar excitation systems |
US4628245A (en) * | 1983-06-15 | 1986-12-09 | Associated Electrical Industries Limited | Multipolar excitation systems |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB167242A (en) | Improvements relating to dynamo electric machines adapted for synchronous working | |
US2055240A (en) | Rotary transformer for direct electric current | |
US1575729A (en) | Alternating-current motor | |
GB190906103A (en) | Improvements relating to Alternating Electric Current Machines. | |
GB196586A (en) | Improvements in or relating to synchronized asynchronous machines | |
US551863A (en) | Maurice hutin and maurice leblanc | |
US1526382A (en) | Synchronous dynamo-electric machinery | |
SU599A1 (en) | Collector alternator of multiphase current with a variable number of periods at a constant number of revolutions | |
US2505019A (en) | Alternating-current commutator motor | |
US3146389A (en) | Rotary electric machines | |
US1016021A (en) | Alternating-current dynamo. | |
US1614093A (en) | Alternating-current motor | |
GB191410562A (en) | A Double Pole Electric Rotary Converter also applicable as a Double Current Generator or Motor. | |
GB191401341A (en) | Improvements in and relating to Dynamo Electric Machines. | |
GB190511703A (en) | Improvements in and relating to Synchronous Alternating Electric Current Dynamo Electric Machines. | |
GB196750A (en) | Improvements in and relating to synchronous dynamo electric machines | |
GB337097A (en) | Alternating current synchronous motors | |
GB191026984A (en) | Improvements in Single-phase Alternating-current Motors. | |
GB247913A (en) | Apparatus for compensating or regulating the power factor for asynchronous dynamo-electric machines | |
GB191309261A (en) | Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working. | |
GB191424837A (en) | Improvements in or relating to Alternating Current Dynamo-electric Machines adapted for Synchronous Working. | |
GB191518137A (en) | Improvements in and relating to Dynamo-electric Machines. | |
GB654376A (en) | Improvements in and relating to dynamoelectric machines | |
GB112495A (en) | Improvements in and relating to Alternating Current Dynamo- electric Machines. | |
GB191513484A (en) | Improvements in Dynamo Electric Machines. |