GB670879A - Improvements in or relating to electric motor control systems - Google Patents
Improvements in or relating to electric motor control systemsInfo
- Publication number
- GB670879A GB670879A GB748149A GB748149A GB670879A GB 670879 A GB670879 A GB 670879A GB 748149 A GB748149 A GB 748149A GB 748149 A GB748149 A GB 748149A GB 670879 A GB670879 A GB 670879A
- Authority
- GB
- United Kingdom
- Prior art keywords
- contacts
- motors
- series
- field
- field winding
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
670,879. Control of D.C. motors. GENERAL ELECTRIC CO., Ltd., and CROFT, E. H. March 20, 1950. [March 18, 1949] No. 7481/49. Class 38 (iii). A control system for an electric motor having a field winding 11 in series with the armature has provision for weakening the field in stages : in one of the stages a, part only of the field winding is shunted by a direct circuit comprising resistance 13 and inductance 14, said inductance having a value sufficient to limit the flow of circulating current in the diverted portion of the field winding in the event of a voltage surge on the supply to the motor, and in a further stage the previously diverted portion of the field winding is cut out of circuit. The application to a series-parallel control system comprising four motors is shown. The pairs of motors 10, 10a and 10b, 10c are each permanently in series and reversing switches 26, 26b are provided. The motors are accelerated by connecting the pairs in series and removing sections of armature resistance in succession. The armature resistance is then re-inserted to form a bridge transition circuit. In the full parallel connection, field'reduction in steps is obtained by closing contacts 62, 62b, then opening these contacts and closing contacts 63, 63b. A further degree of field weakening may be provided by closing contacts 62, 62b, 63, 63b, simultaneously. Contacts 65. 65b, are then opened and contacts 66, 66b, are closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB748149A GB670879A (en) | 1949-03-18 | 1949-03-18 | Improvements in or relating to electric motor control systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB748149A GB670879A (en) | 1949-03-18 | 1949-03-18 | Improvements in or relating to electric motor control systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB670879A true GB670879A (en) | 1952-04-30 |
Family
ID=9833949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB748149A Expired GB670879A (en) | 1949-03-18 | 1949-03-18 | Improvements in or relating to electric motor control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB670879A (en) |
-
1949
- 1949-03-18 GB GB748149A patent/GB670879A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1269304A (en) | Improvements in or relating to brushless d.c. motors | |
| GB670879A (en) | Improvements in or relating to electric motor control systems | |
| GB1088801A (en) | Control circuit for d-c motors having dual series field windings | |
| JPS5834525A (en) | Dc switch | |
| GB1266335A (en) | ||
| JPS5622254A (en) | Magnetic disc driving unit | |
| SU668523A1 (en) | Superconducting switch | |
| SU1197019A2 (en) | Thyratron motor | |
| JPS5490527A (en) | Protection system for transistor inverter circuit | |
| SU862261A1 (en) | Device for switching-off inductive load | |
| JPS571A (en) | Controlling device for electric motor vehicle | |
| GB558886A (en) | Improvements in and relating to electric motor control systems | |
| JPS5343316A (en) | Operation control system for electric car | |
| GB635016A (en) | Electric motor control system | |
| SU508849A1 (en) | Device for multistage remote directional relay protection of parallel lines of electrical transmission | |
| GB539734A (en) | Improvements in electric motor control systems | |
| GB518391A (en) | Improvements in or relating to electric circuit controllers, particularly electric motor controllers | |
| JPS5499914A (en) | Driver for dc motors | |
| JPS53101613A (en) | Drive circuit for dc electric motor vehicle | |
| GB607252A (en) | Improvements connected with switching arrangements for the field control of d.c. electric motors | |
| GB528554A (en) | Improvements in or relating to electric motor control systems | |
| JPS5541146A (en) | Separately excited regenerative brake circuit for electric motor vehicle | |
| GB619943A (en) | Improvements in and relating to fluid-actuated electric switches | |
| GB473137A (en) | Improvements in control systems for electric motors | |
| GB552940A (en) | Improvements in or relating to electro-magnetically operated contactor switches |