GB804351A - Improvements in or relating to the control of electromagnets - Google Patents
Improvements in or relating to the control of electromagnetsInfo
- Publication number
- GB804351A GB804351A GB16925/55A GB1692555A GB804351A GB 804351 A GB804351 A GB 804351A GB 16925/55 A GB16925/55 A GB 16925/55A GB 1692555 A GB1692555 A GB 1692555A GB 804351 A GB804351 A GB 804351A
- Authority
- GB
- United Kingdom
- Prior art keywords
- magnet
- contactor
- energized
- june
- resistor
- 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
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F7/00—Magnets
- H01F7/06—Electromagnets; Actuators including electromagnets
- H01F7/08—Electromagnets; Actuators including electromagnets with armatures
- H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
- H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
- H01F7/1811—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current demagnetising upon switching off, removing residual magnetism
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Relay Circuits (AREA)
Abstract
804,351. Switching systems for electromagnets. IGRANIC ELECTRIC CO., Ltd. June 13, 1955 [June 23, 1954], No. 16925/55. Class 38 (4). The working cycle of a lifting magnet 10 is initiated by moving switch 34 to the " lift " position whereby contactor 12 is energized to complete the circuit to the operating-coil of the magnet. The contact or 12 also lifts a contactor 24 by means of a mechanical connection 44. When switch 34 is moved to the " drop " position, the contactor 12 is de-energized to provide reverse energization of the magnet 10 through resistors 36, 40, which reduce the tune constant of the reverse energization circuit. The magnet current is first reduced to zero and then begins to increase in the reverse direction to oppose residual magnetism. Contactor 24 is held lifted by coil 26 which is connected in series with resistor 38 across the terminals of magnet 10. When the magnet voltage is reduced to a selected value, and while the voltage is decreasing at a rapid rate before the residual magnetism has been entirely overcome, the contactor 24 drops to interrupt the power supply to the magnet, and the remaining energy is dissipated in resistor 42.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US804351XA | 1954-06-23 | 1954-06-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB804351A true GB804351A (en) | 1958-11-12 |
Family
ID=22157356
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16925/55A Expired GB804351A (en) | 1954-06-23 | 1955-06-13 | Improvements in or relating to the control of electromagnets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB804351A (en) |
-
1955
- 1955-06-13 GB GB16925/55A patent/GB804351A/en not_active Expired
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