GB1514717A - Control arrangements for electric machines - Google Patents
Control arrangements for electric machinesInfo
- Publication number
- GB1514717A GB1514717A GB30980/74A GB3098074A GB1514717A GB 1514717 A GB1514717 A GB 1514717A GB 30980/74 A GB30980/74 A GB 30980/74A GB 3098074 A GB3098074 A GB 3098074A GB 1514717 A GB1514717 A GB 1514717A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- amplifier
- diodes
- current
- path
- 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
- H02P7/292—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 static converters, e.g. AC to DC
- H02P7/293—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 static converters, e.g. AC to DC using phase control
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Linear Motors (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
1514717 Automatic speed control GECELLIOTT AUTOMATION Ltd 30 June 1975 [12 July 1974] 30980/74 Heading G3R A speed control system for an electric motor has a motor speed feedback loop including a lowpass filter whose characteristic is varied temporarily to increase the system response e.g. to a step load. In the embodiment, for use with a D.C. motor, the output at 6 from a motor driven D.C. tachometer is compared in amplifier 7 with a speed reference, on 9, to form a current reference for an inner motor current control loop. The negative feedback components of speed control amplifier 7 form a first path 14, 15 and a second path 11, 12, 13, 21, 22, the latter being provided with grounded diodes 16, 17. In response to a step change in load e.g. in a strip rolling mill, the current in resistance 13 increases until one of the diodes 16, 17 breaks down. The amplifier feedback is then determined only by the first path 14, 15 whose components are such as to give a temporarily higher amplifier gain and bandwith, lower error time integral and thus faster system response. Non-linear network 20 limits the rate output of amplifier 7 and affords motor protection. Diode bridge 21, whose forward biasing current determines the switch on time of the diodes, and resistance 22, which determines when the diodes cease to conduct, may be omitted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB30980/74A GB1514717A (en) | 1975-06-30 | 1975-06-30 | Control arrangements for electric machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB30980/74A GB1514717A (en) | 1975-06-30 | 1975-06-30 | Control arrangements for electric machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1514717A true GB1514717A (en) | 1978-06-21 |
Family
ID=10316106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB30980/74A Expired GB1514717A (en) | 1975-06-30 | 1975-06-30 | Control arrangements for electric machines |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1514717A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0056059B1 (en) * | 1980-07-02 | 1985-11-13 | Fanuc Ltd. | Speed control device for electric motor |
-
1975
- 1975-06-30 GB GB30980/74A patent/GB1514717A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0056059B1 (en) * | 1980-07-02 | 1985-11-13 | Fanuc Ltd. | Speed control device for electric motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| 732 | Registration of transactions, instruments or events in the register (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |