GB677444A - Improvements in and relating to speed control systems for electric motors - Google Patents
Improvements in and relating to speed control systems for electric motorsInfo
- Publication number
- GB677444A GB677444A GB25379/49A GB2537949A GB677444A GB 677444 A GB677444 A GB 677444A GB 25379/49 A GB25379/49 A GB 25379/49A GB 2537949 A GB2537949 A GB 2537949A GB 677444 A GB677444 A GB 677444A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- speed
- field
- supply
- synchronous
- 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
- 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 Ac Motors In General (AREA)
Abstract
677,444. Automatic speed control systems. BRITISH THOMSON-HOUSTON CO., Ltd. Oct. 3, 1949 [Oct. 12, 1948], No. 25379/49. Class 38 (iv). The speed of a D.C. motor is synchronized with the frequency of an A.C. supply, by means of a synchronous switch driven by the motor to select positive or negative halves of each cycle of the supply frequency to energize a regulating field. The control may be applied to amplidyne motor, or a motor with an amplidyne exciter, Figs. 1-3 (not shown), or a conventional D.C. motor, Fig. 11. As shown, the shunt field 95 is adjusted by resistor 96 to run the motor about synchronous speed. The rotary switch 100, which has a 90 degree insulating portion (shown shaded) energizes the regulating field 97 from the A.C. supply. At synchronous speed equal positive and negative halves of the A.C. cycle are fed to the regulating field, Fig. 7 (I) (not shown). If the speed increases or decreases positive on negative halfcycles, Fig. 7 (II) and (IV) (not shown), are fed to the regulating field to boost or buck the main field. To synchronize at sub-multiplies of the fundamental synchronous speed, switches with two or more insulating segments may be used, Figs. 4-6 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US677444XA | 1948-10-12 | 1948-10-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB677444A true GB677444A (en) | 1952-08-13 |
Family
ID=22078102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB25379/49A Expired GB677444A (en) | 1948-10-12 | 1949-10-03 | Improvements in and relating to speed control systems for electric motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB677444A (en) |
-
1949
- 1949-10-03 GB GB25379/49A patent/GB677444A/en not_active Expired
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