GB802184A - Improvements in or relating to electric motor control systems - Google Patents
Improvements in or relating to electric motor control systemsInfo
- Publication number
- GB802184A GB802184A GB13494/56A GB1349456A GB802184A GB 802184 A GB802184 A GB 802184A GB 13494/56 A GB13494/56 A GB 13494/56A GB 1349456 A GB1349456 A GB 1349456A GB 802184 A GB802184 A GB 802184A
- Authority
- GB
- United Kingdom
- Prior art keywords
- transistor
- error signal
- speed
- pulses
- produce
- 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
- H02P7/2825—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 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
802,184. Automatic speed-control systems. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. May 2, 1956 [May 6, 1955], No. 13494/56. Class 38 (4). In a speed regulating system for a D.C. motor 1 wherein a signal proportional to speed developed in a tachometer generator 9 is compared with the same type of signal from a reference source 16 to produce an error signal, a transistor switch 49 coupling the motor to a direct current source 57 through the emitter to collector conduction path is selectively biased to one extreme ofcollector conduction current (saturation or cut-off) and a pulse generator 26 is arranged to produce pulses which bias the transistor switch to the other extreme in a manner whereby the average collector current is such as to restore the motor speed to the desired speed in accordance with the error signal. Triangular pulses derived from alternating current source 22 by rectifier 23 and linear and non-linear resistors 27 and 25, are applied to the base of transistor 41 and the emitter which is biased from point 18 in the combining circuit 13 determines the peak amplitude. The output across resistor 35 is limited by a Zener diode 37 to supply rectangular pulses the duration of which is proportional to the error signal to the base of transistor 49. A modified arrangement in which the frequency of an A.C. tachometer generator is compared with the frequency of a reference source to produce from a singleshot transistor multivibrator, constant width pulses having a repetition rate proportional to the error signal is described with reference to Fig. 2, (not shown). Reference has been directed by the Comptroller to Specification 775,827.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US802184XA | 1955-05-06 | 1955-05-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB802184A true GB802184A (en) | 1958-10-01 |
Family
ID=22155999
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB13494/56A Expired GB802184A (en) | 1955-05-06 | 1956-05-02 | Improvements in or relating to electric motor control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB802184A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3152462A (en) * | 1961-12-13 | 1964-10-13 | Gen Motors Corp | Clothes washing machine and control means therefor |
| US3189809A (en) * | 1961-09-28 | 1965-06-15 | Westinghouse Electric Corp | Generator-fed motor control with bistable field control of generator and motor |
| DE1263908B (en) * | 1959-09-25 | 1968-03-21 | Globe Ind Inc | Arrangement for regulating the speed of a direct current motor by means of a switching transistor arranged in the armature circuit |
-
1956
- 1956-05-02 GB GB13494/56A patent/GB802184A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1263908B (en) * | 1959-09-25 | 1968-03-21 | Globe Ind Inc | Arrangement for regulating the speed of a direct current motor by means of a switching transistor arranged in the armature circuit |
| US3189809A (en) * | 1961-09-28 | 1965-06-15 | Westinghouse Electric Corp | Generator-fed motor control with bistable field control of generator and motor |
| US3152462A (en) * | 1961-12-13 | 1964-10-13 | Gen Motors Corp | Clothes washing machine and control means therefor |
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