GB230572A - Improvements in or relating to electric motors for use on a constant current variable voltage system - Google Patents
Improvements in or relating to electric motors for use on a constant current variable voltage systemInfo
- Publication number
- GB230572A GB230572A GB3228023A GB3228023A GB230572A GB 230572 A GB230572 A GB 230572A GB 3228023 A GB3228023 A GB 3228023A GB 3228023 A GB3228023 A GB 3228023A GB 230572 A GB230572 A GB 230572A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- field winding
- auxiliary machine
- resistance
- circuit
- 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
- 238000004804 winding Methods 0.000 abstract 8
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P7/00—Arrangements for regulating or controlling the speed or torque of electric DC motors
- H02P7/06—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current
- H02P7/18—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power
- H02P7/24—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices
- H02P7/28—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices
- H02P7/282—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling field supply only
- H02P7/2825—Arrangements for regulating or controlling the speed or torque of electric DC motors for regulating or controlling an individual DC dynamo-electric motor by varying field or armature current by master control with auxiliary power using discharge tubes or semiconductor devices using semiconductor devices controlling field supply only whereby the speed is regulated by measuring the motor speed and comparing it with a given physical value
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
230,572. Austin, G., Macfarlane, J. C., and Macfarlane, W. A. Dec. 27, 1923. Exciting. - The field winding of a constantcurrent motor having fixed brushes is connected in a circuit derived from the main constant-current supply, in which circuit is also connected in opposition the armature of an auxiliary dynamoelectric machine driven by the main motor, the field winding of the auxiliary machine being connected in series with the motor armature. The field winding 6, Fig. 1, of the motor 1 and the armature 11 of the auxiliary machine are connected in series across an adjustable resistance 5 in the main circuit, or a fixed resistance may be used such as a field winding or brake-magnet coil, and a separate potentiometer may be connected as a shunt to this resistance. This arrangement produces a drooping speed-torque characteristic. If it is desired to obtain a higher normal speed with a similar characteristic, a shunt 21 may be provided for the field winding 16 of the auxiliary machine, the resistance of the potentiometer may be increased, or an adjustable resistance may be provided in the field circuit 6. Fig. 4 shows a potentiometer 25 by means of which the speed and direction of rotation of the motor can be controlled. Fig. 6 shows a modified arrangement for maintaining full torque over a wide range of speed. The auxiliary machine is provided with an additional field winding 16<a> connected so as to oppose the main winding 16. Further modified characteristics may be obtained by providing extra field windings on the motor or auxiliary machine and connected in shunt to either of the armatures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3228023A GB230572A (en) | 1923-12-27 | 1923-12-27 | Improvements in or relating to electric motors for use on a constant current variable voltage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3228023A GB230572A (en) | 1923-12-27 | 1923-12-27 | Improvements in or relating to electric motors for use on a constant current variable voltage system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB230572A true GB230572A (en) | 1925-03-19 |
Family
ID=10336146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3228023A Expired GB230572A (en) | 1923-12-27 | 1923-12-27 | Improvements in or relating to electric motors for use on a constant current variable voltage system |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB230572A (en) |
-
1923
- 1923-12-27 GB GB3228023A patent/GB230572A/en not_active Expired
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