GB750236A - Improvements relating to control of electrically driven mine winders, hoists, and the like - Google Patents
Improvements relating to control of electrically driven mine winders, hoists, and the likeInfo
- Publication number
- GB750236A GB750236A GB1125653A GB1125653A GB750236A GB 750236 A GB750236 A GB 750236A GB 1125653 A GB1125653 A GB 1125653A GB 1125653 A GB1125653 A GB 1125653A GB 750236 A GB750236 A GB 750236A
- Authority
- GB
- United Kingdom
- Prior art keywords
- control
- energize
- rheostat
- governor
- cam
- 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
- H02P7/34—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 Ward-Leonard arrangements
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
750,236. Automatic speed control systems. METROPOLITAN-VICKERS ELECTRICAL CO., Ltd. April 2, 1954 [April 23, 1953], No. 11256/53. Drawings to Specification. Class 38 (4). [Also in Group XXXVII] In an electrically driven hoist having a manually controlled speed adjusting rheostat, an automatic control system is arranged to correct any error between the actual speed and the desired speed set by manual adjustment. Several embodiments with suggested modifications are described as applied to a Ward- Leonard drive : (i) the control lever H operates a speed-control rheostat R (in series with the Ward-Leonard generator field F) and a reference potentiometer P, the error signal comprises the difference between the reference voltage and the voltage of a tacho-generator TG driven by the motor. The error signal may : (a) energize relays RL1 ... RL3 according to its magnitude to short out sections of the control rheostat, Fig. 1 (not shown); (b) control a Tirrell type field regulator, Fig. 4 (not shown); (c) energize a torque motor TM connected to a differential Selsyn DS in a Selsyn link ST, RS, between the control lever and the rheostat; (d) energize a torque motor TM to move the drum of the control rheostat relative to the contact arm (operated by the control lever), Fig. 9 (not shown); (e) differentially energize the fields of an exciter MG, Figs. 10, 11 (not shown) ; (f) control a magnetic amplifier to energize an auxiliary field or to boost the generator field supply, Figs. 12, 13 (not shown). (ii) Contacts are operated in accordance with the difference in movement of a cam CM connected to the control lever and a centrifugal governor G driven by the motor: (a) the governor and the cam may act on opposite ends of a lever to operate sequentially-closing contacts, Fig. 2 (not shown); (b) the cam may move contacts which sequentially engage with a governor operated contact, Fig. 3 (not shown); (c) the governor operated contact may be oscillated by a continuously driven cam RCM to provide a " variable on/off period " type of control, Fig. 6 (not shown); (d) the governor may act on the knee joint of a togglelinkage to vary the effective length of a pushrod, Fig. 7 (not shown).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1125653A GB750236A (en) | 1953-04-23 | 1953-04-23 | Improvements relating to control of electrically driven mine winders, hoists, and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1125653A GB750236A (en) | 1953-04-23 | 1953-04-23 | Improvements relating to control of electrically driven mine winders, hoists, and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB750236A true GB750236A (en) | 1956-06-13 |
Family
ID=9982880
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1125653A Expired GB750236A (en) | 1953-04-23 | 1953-04-23 | Improvements relating to control of electrically driven mine winders, hoists, and the like |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB750236A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474163A (en) * | 2022-04-06 | 2022-05-13 | 北京全路通信信号研究设计院集团有限公司 | Real-time positioning method, device and system for track robot |
-
1953
- 1953-04-23 GB GB1125653A patent/GB750236A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114474163A (en) * | 2022-04-06 | 2022-05-13 | 北京全路通信信号研究设计院集团有限公司 | Real-time positioning method, device and system for track robot |
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