GB1055034A - Electrical control circuit arrangement for lifting-magnets - Google Patents
Electrical control circuit arrangement for lifting-magnetsInfo
- Publication number
- GB1055034A GB1055034A GB444564A GB444564A GB1055034A GB 1055034 A GB1055034 A GB 1055034A GB 444564 A GB444564 A GB 444564A GB 444564 A GB444564 A GB 444564A GB 1055034 A GB1055034 A GB 1055034A
- Authority
- GB
- United Kingdom
- Prior art keywords
- winding
- magnet
- rectifier
- contactors
- lifting
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/18—Control systems or devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C2700/00—Cranes
- B66C2700/08—Electrical assemblies or electrical control devices for cranes, winches, capstans or electrical hoists
- B66C2700/087—Electrical assemblies or electrical control devices for electrically actuated grabs
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Load-Engaging Elements For Cranes (AREA)
Abstract
1,055,034. Control systems for lifting magnets. TRUNINGER A.G. Feb. 3. 1964. 4445/64. Heading H2H. A system for controlling the energization of a lifting magnet has the winding 10 of the magnet permanently connected to the output of a rectifier 4 supplied from a three-phase source over a main switch 1 and a contactor 2. Reverse energization of the winding 10 is provided by a transformer 12 and rectifier 18. When it is desired to drop the load on the magnet contactors 2 and 11 are opened and contactors 16 closed. The collapse of the magnetic flux in the winding 10 produces a voltage which bucks the voltage from the rectifier 18 so that initially a relay coil 21 remains de-energized. As the voltage due to the collapse of the flux decreases the relay coil 21 becomes energized to close contacts 24 thereby applying reverse energization to the magnet winding 10. When the reverse energization reaches a predetermined value a relay 8 is energized sufficiently to cause its contacts to make thus to effect opening of contactors 16 so switching off the reverse energization of the winding 10. The pull-in point of relay 8 may be adjusted by means of a variable resistor 28.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB444564A GB1055034A (en) | 1964-02-03 | 1964-02-03 | Electrical control circuit arrangement for lifting-magnets |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB444564A GB1055034A (en) | 1964-02-03 | 1964-02-03 | Electrical control circuit arrangement for lifting-magnets |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1055034A true GB1055034A (en) | 1967-01-11 |
Family
ID=9777317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB444564A Expired GB1055034A (en) | 1964-02-03 | 1964-02-03 | Electrical control circuit arrangement for lifting-magnets |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1055034A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143696A (en) * | 1983-07-18 | 1985-02-13 | Pt Components Inc | Operating coil control system |
-
1964
- 1964-02-03 GB GB444564A patent/GB1055034A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2143696A (en) * | 1983-07-18 | 1985-02-13 | Pt Components Inc | Operating coil control system |
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