GB221061A - Improvements relating to direct current electric motors - Google Patents
Improvements relating to direct current electric motorsInfo
- Publication number
- GB221061A GB221061A GB1957823A GB1957823A GB221061A GB 221061 A GB221061 A GB 221061A GB 1957823 A GB1957823 A GB 1957823A GB 1957823 A GB1957823 A GB 1957823A GB 221061 A GB221061 A GB 221061A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- field
- alternating current
- current
- speed
- 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
- H02P7/2805—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 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 Direct Current Motors (AREA)
Abstract
221,061. Cooch, H. July 31, 1923. Speed-maintaining systems.-A direct-current motor is automatically controlled for constant speed by taking off alternating current from tappings or from a coupled generator, and passing the alternating current through a periodic contact device so as to produce compensatory impulses in the field or armature of the motor or in the field of an auxiliary generator connected in the motor circuit. In the arrangement shown in Fig. 1, the motor armature winding 1 is tapped so as to give alternating current to a transformer 5 the secondary of which is connected to a rated vibratory contact device 8, 9 and to a condenser 13 shunted across a resistance 10 in circuit with the motor field 2. Any departure from a set relation between the successive vibratory contacts and the alternating-current periods alters the effective value of the resistance 10, adjustments being made so that the alteration corrects the speed of the motor. The vibratory contact may be a double-pole reversing switch, or may be replaced by a rotary brush switch. Two or more motors may be simultaneously controlled so as to run synchronously.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1957823A GB221061A (en) | 1923-07-31 | 1923-07-31 | Improvements relating to direct current electric motors |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB1957823A GB221061A (en) | 1923-07-31 | 1923-07-31 | Improvements relating to direct current electric motors |
Publications (1)
Publication Number | Publication Date |
---|---|
GB221061A true GB221061A (en) | 1924-09-04 |
Family
ID=10131696
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1957823A Expired GB221061A (en) | 1923-07-31 | 1923-07-31 | Improvements relating to direct current electric motors |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB221061A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9649874B2 (en) | 2013-06-06 | 2017-05-16 | Yakov Miller | Foil stamping machine |
-
1923
- 1923-07-31 GB GB1957823A patent/GB221061A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9649874B2 (en) | 2013-06-06 | 2017-05-16 | Yakov Miller | Foil stamping machine |
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