GB347824A - Improvements in or relating to means for controlling electric motors - Google Patents
Improvements in or relating to means for controlling electric motorsInfo
- Publication number
- GB347824A GB347824A GB840630A GB840630A GB347824A GB 347824 A GB347824 A GB 347824A GB 840630 A GB840630 A GB 840630A GB 840630 A GB840630 A GB 840630A GB 347824 A GB347824 A GB 347824A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coil
- contactor
- resistance
- lock
- controller
- 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
- 230000003111 delayed effect Effects 0.000 abstract 1
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
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
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/02—Details of starting control
- H02P1/04—Means for controlling progress of starting sequence in dependence upon time or upon current, speed, or other motor parameter
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor And Converter Starters (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
347,824. Master control of motors ; electromagnetic switches. C L A R K E, CHAPMAN, & CO., Ltd. and READ, A., Victoria Works, Gateshead-on-Tyne. March 15, 1930, No. 8406. [Classes 38 (iii) and 38 (v).] The closing of a series of sequential contactors, the holding coil circuits of which are independently completed by a master controller, is suitably delayed by an arrangement of resistances having a large positive temperature co-efficient. In one form of the invention, when a controller 7 is moved to its first position, a contactor 1 closes, to connect the motor 15 across the mains with a resistance 17 in its armature circuit. In closing, the contactor 1 closes a switch 9, and a resistance 13 being cold, a large current flows through a lock-out coil 11 of the next contactor 2. The resistance 13 is heated by the current, and its resistance rises, so that after a time the current through the coil 11 is sufficiently reduced to allow the contactor 2 to close, if the controller 7 is moved to its second position. The remaining contactors are controlled in a similar manner. A series coil may be used to assist the lock-out coil. In a modification, no lock-out coil is used, and the special resistance is placed in shunt with the holding coil of the contactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB840630A GB347824A (en) | 1930-03-15 | 1930-03-15 | Improvements in or relating to means for controlling electric motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB840630A GB347824A (en) | 1930-03-15 | 1930-03-15 | Improvements in or relating to means for controlling electric motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB347824A true GB347824A (en) | 1931-05-07 |
Family
ID=9851917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB840630A Expired GB347824A (en) | 1930-03-15 | 1930-03-15 | Improvements in or relating to means for controlling electric motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB347824A (en) |
-
1930
- 1930-03-15 GB GB840630A patent/GB347824A/en not_active Expired
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