GB642447A - A circuit connection for the compensation of shunt multiphase commutator machines - Google Patents
A circuit connection for the compensation of shunt multiphase commutator machinesInfo
- Publication number
- GB642447A GB642447A GB34657/47A GB3465747A GB642447A GB 642447 A GB642447 A GB 642447A GB 34657/47 A GB34657/47 A GB 34657/47A GB 3465747 A GB3465747 A GB 3465747A GB 642447 A GB642447 A GB 642447A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rotor
- transformer
- winding
- current
- secondaries
- 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
- H02K27/00—AC commutator motors or generators having mechanical commutator
- H02K27/12—AC commutator motors or generators having mechanical commutator having multi-phase operation
- H02K27/16—AC commutator motors or generators having mechanical commutator having multi-phase operation in shunt connection with stator feeding
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
642,447. Automatic speed control systems. MORAVIAN ELECTRICAL ENGINEERING WORKS, and KLIMA, V. Dec. 30, 1947, No. 34657. Convention date, Sept. 20, 1946. [Class 38 (iv)] [Also in Group XXXVII] In order to obtain speed control and phase compensation of a polyphase shunt commutator motor a voltage having the following components is introduced in its rotor: (A) Voltage component produced by the secondary winding 6. This component is constant but has such a magnitude and phase as to cause the no-load current to flow in the rotor 2 at synchronous speed. (B) Voltage component produced by the tapped secondary winding 10. This component is regulated automatically, e.g. by means of a tachometer dynamo driven by the rotor 2, a relay and a servomotor, in order to maintain normal rotor current according to the load at synchronous. speed. (C) Voltage component produced by the tapped secondary winding 4. This component is adjusted to obtain different no-load speeds with unchanged rotor current. (D) Voltage component produced by the tapped secondary winding 8. This component is also regulated according to the load. The brushes 13, 15 of the secondaries 4, 8 of the transformers 3/4, 7/8 respectively are linked and move together, and the brushes 14, 16 of the corresponding secondaries 4, 8 are also linked, but the movement of the latter is in opposite direction to that of the brushes 13, 15. Also the brushes 17, 19 of the secondaries 10, 12 of the transformers 9/10, 11/12 respectively are linked, and the brushes 18, 20 of the corresponding secondaries 10, 12 are also linked and move simultaneously in opposite direction. The primaries 5, 9, 11 of the transformers 5/6, 9/10, 11/12 respectively are divided and arranged on two cores in order to attain in the respective secondaries 6, 10, 12 induced voltages having a phase displacement with respect to the main voltages. The winding 12 supplies the primary 7 of the transformer 7/8. The windings 6, 10, 8, 4 producing the four components A, B, D, C of the voltage introduced in the rotor 2 are connected in series with the rotor 2. Fig. 2 shows a modification in which a double-wound induction regulator 3/4 is used instead 'of the regulating transformer 3/4 used in Fig. 1. Two transformers are used, one having a primary 5 with two secondaries 6, 12. The latter is variable and supplies the primary of the second transformer. One secondary 10 of the second transformer produces said voltage component B and a second secondary produces said voltage component D and is in series with a winding of the induction regulation 3/4. The secondary winding 6 of the first transformer, the winding 4 of the induction regulation 3/4 and the winding 10 of the second transformer are in series with the rotor 2. In a further modification, automatic regulation is obtained in dependence on constant wattless current, by using a small 1-phase commutator motor, the rotor of which is fed from a current transformer having a large air gap with its primary carrying a current proportionate to the stator current of the 3-phase shunt commutator motor. The rotor of the 1-phase commutator motor is adapted to adjust the number of turns of the winding 4 of the regulating transformer 3/4.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS642447X | 1946-09-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB642447A true GB642447A (en) | 1950-09-06 |
Family
ID=5454218
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB34657/47A Expired GB642447A (en) | 1946-09-20 | 1947-12-30 | A circuit connection for the compensation of shunt multiphase commutator machines |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB642447A (en) |
-
1947
- 1947-12-30 GB GB34657/47A patent/GB642447A/en not_active Expired
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