GB841585A - Improvements in and relating to the control of electric motor-speed changing gear combinations - Google Patents
Improvements in and relating to the control of electric motor-speed changing gear combinationsInfo
- Publication number
- GB841585A GB841585A GB1273557A GB1273557A GB841585A GB 841585 A GB841585 A GB 841585A GB 1273557 A GB1273557 A GB 1273557A GB 1273557 A GB1273557 A GB 1273557A GB 841585 A GB841585 A GB 841585A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor generator
- motor
- gear
- control
- variable
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/46—Automatic regulation in accordance with output requirements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/38—Control of exclusively fluid gearing
- F16H61/40—Control of exclusively fluid gearing hydrostatic
- F16H61/46—Automatic regulation in accordance with output requirements
- F16H61/47—Automatic regulation in accordance with output requirements for achieving a target output speed
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
841,585. Variable-speed control. BRITISH THOMSON-HOUSTON CO. Ltd. April 18, 1958 [April 18, 1957; Feb. 19, 1958], Nos. 12735/57 and 5442/58. Class 80 (2). [Also in Groups XXVII, XXIX and XXXV] An hydraulic or other variable-ratio gear 2 driven from a synchronous or asynchronous motor generator 1 for starting an aircraft gas-turbine engine 3 through reduction gear 18 and a one-way clutch 16, and subsequently being driven as a generator by the engine 3 directly through a one-way clutch 17, is controlled automatically according to the supply current when operating as a motor, to maintain substantially constant the output torque of the motor. In Fig. (Prov. 12735/57), the motor generator 1 has D.C. excitation s2, and its three-phase armature supply s1 passes in series through the stator winding of a power meter 4, the rotor winding of which is energized directly by the supply, whereby an arm 5 on the rotor, biased by a spring 6, moves in accordance with the power absorbed by the motor generator 1 and, through a control 8 adjusts the variableratio gear (which preferably includes zero output speed) to maintain a constant output torque of the motor generator 1, until the engine 3 drives whereupon the motor load becomes zero, the variable gear 2 moves to the end of its range and is subsequently controlled by a governor. In Fig. (Prov. 5442/58) the electrical power absorbed by the motor generator 1 is compared with that of a fixed reference supply 30, 31 and any deviation therefrom is used to operate the control 8 (such as a valve) of the variableratio gear 2 to maintain a constant output torque of the motor generator 1 during engine starting. Current and voltage transformers 23, 22 are used, the former supplying a fixed resistor 24, connecting a centre-tap of the transformer 22 to the junction of two transformers 25, 26 which feeds through bridge rectifiers 27, 28 a resistor 29 in circuit with the reference supply 30, 31. As the current in the resistor 29 rises above or falls below the reference current a polarized relay 210 or magnetic amplifier is actuated in the appropriate direction to operate the variable-ratio control 8 to adjust the motor load. Specification 814,217 is referred to.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1273557A GB841585A (en) | 1957-04-18 | 1957-04-18 | Improvements in and relating to the control of electric motor-speed changing gear combinations |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1273557A GB841585A (en) | 1957-04-18 | 1957-04-18 | Improvements in and relating to the control of electric motor-speed changing gear combinations |
Publications (1)
Publication Number | Publication Date |
---|---|
GB841585A true GB841585A (en) | 1960-07-20 |
Family
ID=10010138
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1273557A Expired GB841585A (en) | 1957-04-18 | 1957-04-18 | Improvements in and relating to the control of electric motor-speed changing gear combinations |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB841585A (en) |
-
1957
- 1957-04-18 GB GB1273557A patent/GB841585A/en not_active Expired
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