GB657380A - Feeding means for scrap steel electro-magnets - Google Patents
Feeding means for scrap steel electro-magnetsInfo
- Publication number
- GB657380A GB657380A GB4458/49A GB445849A GB657380A GB 657380 A GB657380 A GB 657380A GB 4458/49 A GB4458/49 A GB 4458/49A GB 445849 A GB445849 A GB 445849A GB 657380 A GB657380 A GB 657380A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- magnet
- shunt
- current
- generator
- 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
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K23/00—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors
- H02K23/02—DC commutator motors or generators having mechanical commutator; Universal AC/DC commutator motors characterised by arrangement for exciting
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
657,380. Control systems for electromagnets; exciting dynamo-electric machines. ALLMANNA SVENSKA ELEKTRISKA AKTIEBOLAGET. Feb. 18, 1949, No. 4458. Convention date, March 13, 1948. [Classes 35 and 38 (iv)] In a control system to operate lifting electro. magnets, each magnet 1 is supplied from a D.C- generator 2 having three field windings, viz., a shunt winding a, a series winding c in opposition to the shunt winding and a separately fed winding b helping the shunt winding, the magnetization and the demagnetization of the magnet 1 being attained by the switching " on " or " off " of the current in the winding b. The magnitude of the current fed to the magnet is maintained constant irrespective of the thermal condition of its winding by arranging the shunt winding a so that the resistance line coincides with the straight part of the magnetization curve of the generator. When a push-button 5 is actuated a resistance 6 is put in series with the winding b, the current in the magnet drops down with the result that scrap loosely attracted by the magnet will be dropped and when the switch 4 is open, so that no current flows in the winding b, the P.D. of the generator rapidly decreases because the M.M.F. of the winding c preponderates over that of the shunt winding a and will even cause a reversal of polarity causing immediate dropping of the remaining attracted scrap. With the switch 4 closed and the resistance 6 shorted by the push-button 5 the combined M.M.F.'s of winding a and b preponderate over that of c and a steady predetermined value of current flows to energize the magnet 1:
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE657380X | 1948-03-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB657380A true GB657380A (en) | 1951-09-19 |
Family
ID=20314212
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4458/49A Expired GB657380A (en) | 1948-03-13 | 1949-02-18 | Feeding means for scrap steel electro-magnets |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB657380A (en) |
-
1949
- 1949-02-18 GB GB4458/49A patent/GB657380A/en not_active Expired
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB909023A (en) | Magnetic means for indicating the movements and stoppages of movable objects | |
GB1255210A (en) | Magnetizing and demagnetizing apparatus and method | |
GB657380A (en) | Feeding means for scrap steel electro-magnets | |
US3284689A (en) | Dynamo-electric machine control apparatus employing pulses | |
GB1166293A (en) | Apparatus and Method for Controlling Magnetism. | |
GB623661A (en) | Improvements relating to control apparatus for alternating electric current circuits | |
US2858485A (en) | Controls for material handling magnets | |
GB912875A (en) | Electric power supply systems for motor vehicles | |
GB658130A (en) | Improvements relating to electric relays | |
GB880913A (en) | Yarn tensioning device | |
US2614241A (en) | Voltage regulating apparatus | |
SU103065A1 (en) | Contactless magnetic relay | |
GB632056A (en) | Improvements relating to alternating electric current generators | |
GB723801A (en) | Improvements in control systems for electrical transformers | |
GB784403A (en) | Improvements in or relating to control systems for circuits including electromagnets | |
US2569142A (en) | Synchronous motor control system with single relay for field application and removal | |
US1849842A (en) | Signaling device | |
GB1046163A (en) | Lifting electromagnet assembly | |
GB739570A (en) | Means for voltage regulation by aid of an exciter | |
US1340678A (en) | Regulator for electric motors | |
SU89959A1 (en) | The ignition system of the excitation arc of mercury rectifier | |
GB686687A (en) | Improvements in and relating to magnetic relays | |
GB597737A (en) | Arrangement for the rapid braking and for the reversal of calenders or rolling mills for rubber | |
GB633238A (en) | Improvements relating to alternating electric current generators | |
GB693925A (en) | Improvements relating to electrical generating equipment |