GB814368A - Improvements in or relating to electric control systems for effecting a controllabletransfer of power from an alternating current source to a load - Google Patents
Improvements in or relating to electric control systems for effecting a controllabletransfer of power from an alternating current source to a loadInfo
- Publication number
- GB814368A GB814368A GB13495/56A GB1349556A GB814368A GB 814368 A GB814368 A GB 814368A GB 13495/56 A GB13495/56 A GB 13495/56A GB 1349556 A GB1349556 A GB 1349556A GB 814368 A GB814368 A GB 814368A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- transformer
- control systems
- load
- controllabletransfer
- 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
- H02P7/285—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 armature supply only
- H02P7/29—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 armature supply only using pulse modulation
- H02P7/2913—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 armature supply only using pulse modulation 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
814,368. Automatic speed control systems. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. May 2, 1956 [May 6, 1955], No. 13495/56. Class 38 (4). In a system wherein the speed of a motor M is controlled by a transistor 67 switched from one extreme of conduction to the other by width modulated pulses in accordance with an error signal as in Specification 802,184, the transistor emitter-collector path is included in the centre tap connection between the output of a mains transformer 77 and the input of a load transformer 91 feeding the motor field 97. Rectangular pulses are produced across the emitter-collector of transistor 11 which are width modulated in accordance with the output from mixer 107 and are pre-amplified in a highly stable transistor amplifier 115 to control transistor 67. Normal cut-off bias is applied to the transistor from transformer 10 through rectifier 61, and filter network 63, 65. A modified arrangement in which an artificial centretap is created for the secondary of the mains transformer is described with reference to Fig. 2 (not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US814368XA | 1955-05-06 | 1955-05-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB814368A true GB814368A (en) | 1959-06-03 |
Family
ID=22164154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13495/56A Expired GB814368A (en) | 1955-05-06 | 1956-05-02 | Improvements in or relating to electric control systems for effecting a controllabletransfer of power from an alternating current source to a load |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB814368A (en) |
-
1956
- 1956-05-02 GB GB13495/56A patent/GB814368A/en not_active Expired
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