GB744367A - Improvements relating to electric control systems - Google Patents
Improvements relating to electric control systemsInfo
- Publication number
- GB744367A GB744367A GB29964/52A GB2996452A GB744367A GB 744367 A GB744367 A GB 744367A GB 29964/52 A GB29964/52 A GB 29964/52A GB 2996452 A GB2996452 A GB 2996452A GB 744367 A GB744367 A GB 744367A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motors
- pilot
- motor
- winding
- currents
- 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
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
- H02J3/14—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load by switching loads on to, or off from, network, e.g. progressively balanced loading
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2310/00—The network for supplying or distributing electric power characterised by its spatial reach or by the load
- H02J2310/50—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads
- H02J2310/56—The network for supplying or distributing electric power characterised by its spatial reach or by the load for selectively controlling the operation of the loads characterised by the condition upon which the selective controlling is based
- H02J2310/58—The condition being electrical
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
- Y02B70/3225—Demand response systems, e.g. load shedding, peak shaving
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/222—Demand response systems, e.g. load shedding, peak shaving
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control And Safety Of Cranes (AREA)
Abstract
744,367. Automatic current control systems. REYROLLE & CO., Ltd., A. Nov. 26, 1953 [Nov. 26, 1952], No. 29964/52. Class 38 (4). In a system for automatically maintaining equal the relative currents of three Schrage motors by means of three reversible pilot motors each actuating the main motor brushes or an associated induction regulator, currents corresponding respectively to the load currents are supplied to the primary windings of three balancing transformers each having a secondary winding controlling its pilot motor in accordance with the vector difference between pairs of load currents. The transformers are saturable to protect the pilot motors. The motors (not shown) are supplied at A, B and C, Fig. 1. Current transformers 10A, 10B, 10C energize the primary windings 14A, 13B; 14B, 13C; 14C, 13A respectively of balancing transformers 12A, 12B, 12C, so that their secondary windings 15A, 15B, 15C have outputs proportional to the vector differences between the three motor currents taken in pairs. These secondaries each energize one phase winding of each of the pilot motors 11A, 11B, 11C which operate as reversible two phase motors to adjust the brushes of the Schrage motors. In a modification, Fig. 2 (not shown), each pilot motor is supplied through an interrupter so as to prevent it from continuing to run as a single phase motor when the control winding is not energized. In a further modification, Fig. 4 (not shown) the pilot motors are braked by passing D.C. through their reference windings whilst the A.C. is interrupted. In a further modification, Fig. 3 (not shown) all three windings of each pilot motor may be connected to a three phase supply through reversing contactors so that the motors can be manually controlled. In - a further modification, Fig. 5, the interruption of the A.C. supply 1, 2, 3 to each pilot motor, only one of which is shown, e.g. 11, and the intermittent connection to the D.C. braking source 42, is effected respectively by contacts 36, 37 and 39, 40, actuated by a solenoid 35 in series with the control winding 1. The motor thus runs when the error signal in winding 15 exceeds a given limit, and is braked below the limit. Contacts 44, 45, 46, 47, 48, 49, 50 enable the selection of " manual raise," automatic " and " manual lower to be made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB29964/52A GB744367A (en) | 1952-11-26 | 1952-11-26 | Improvements relating to electric control systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB29964/52A GB744367A (en) | 1952-11-26 | 1952-11-26 | Improvements relating to electric control systems |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB744367A true GB744367A (en) | 1956-02-08 |
Family
ID=10300069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29964/52A Expired GB744367A (en) | 1952-11-26 | 1952-11-26 | Improvements relating to electric control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB744367A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735785A (en) * | 2020-12-21 | 2021-04-30 | 青海电研科技有限责任公司 | Single-phase and three-phase integrated exciting transformer |
-
1952
- 1952-11-26 GB GB29964/52A patent/GB744367A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112735785A (en) * | 2020-12-21 | 2021-04-30 | 青海电研科技有限责任公司 | Single-phase and three-phase integrated exciting transformer |
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