GB627625A - Improvements in or relating to electric motor control systems - Google Patents
Improvements in or relating to electric motor control systemsInfo
- Publication number
- GB627625A GB627625A GB307047A GB307047A GB627625A GB 627625 A GB627625 A GB 627625A GB 307047 A GB307047 A GB 307047A GB 307047 A GB307047 A GB 307047A GB 627625 A GB627625 A GB 627625A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- short
- motors
- resistors
- circuited
- 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
- 230000001681 protective effect Effects 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
- H02P5/00—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors
- H02P5/68—Arrangements specially adapted for regulating or controlling the speed or torque of two or more electric motors controlling two or more DC dynamo-electric motors
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Generators And Motors (AREA)
- Control Of Multiple Motors (AREA)
Abstract
627,625. Control of two motors. WESTLAND AIRCRAFT, Ltd., and SWAFFIELD, P. J. Jan. 31, 1947, No. 3070. [Class 38(iii)] A, control system for two separate motors connected in parallel to a current supply source and normally sharing a load, for example one or more fans, incorporates means operating automatically upon failure and cutting out of circuit of either motor to reduce the flow of current through the other motor which still continues to operate. Normally motors A and B are connected in parallel by closure of switches 5 and 6, resistors 3 and 8 being short-circuited by relays 4 and 7 respectively. When the motor A fails, for example, the switch 5 opens to isolate that motor, and the solenoid 13, which is connected across the armature 2, is de-energized to introduce resistor 8 in series with armature 9 so limiting the current therethrough. Similar operation occurs when the other motor fails. In an alternative arrangement, resistors included in the field circuit of each motor are short-circuited to provide increased field strength of one motor upon failure of the other. The short-circuiting devices may be centrifugally operated. Inductances may replace the protective resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB307047A GB627625A (en) | 1947-01-31 | 1947-01-31 | Improvements in or relating to electric motor control systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB307047A GB627625A (en) | 1947-01-31 | 1947-01-31 | Improvements in or relating to electric motor control systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB627625A true GB627625A (en) | 1949-08-12 |
Family
ID=9751427
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB307047A Expired GB627625A (en) | 1947-01-31 | 1947-01-31 | Improvements in or relating to electric motor control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB627625A (en) |
-
1947
- 1947-01-31 GB GB307047A patent/GB627625A/en not_active Expired
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