GB244850A - Improvements in or relating to controllers for electric motors - Google Patents
Improvements in or relating to controllers for electric motorsInfo
- Publication number
- GB244850A GB244850A GB2331024A GB2331024A GB244850A GB 244850 A GB244850 A GB 244850A GB 2331024 A GB2331024 A GB 2331024A GB 2331024 A GB2331024 A GB 2331024A GB 244850 A GB244850 A GB 244850A
- Authority
- GB
- United Kingdom
- Prior art keywords
- switch
- braking
- resistance
- relay
- motor
- 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
- B66C13/22—Control systems or devices for electric drives
- B66C13/23—Circuits for controlling the lowering of the load
- B66C13/24—Circuits for controlling the lowering of the load by dc motors
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Control Of Direct Current Motors (AREA)
Abstract
244,850. Igranic Electric Co., Ltd., (Cutler-Hammer Manufacturing Co.). Oct. 2, 1924. Electric braking. - A hoisting and lowering motor 5 is controlled by a braking switch 9 in conjunction with a resistance varying switch 7 and a timing relay 10, the arrangement being such that the sequence of resistance changes during graduated rheostatic braking varies from the sequence employed in acceleration owing to the action of a switch 6 which short circuits a part of the last resistance section. With the motor in the rheostatic braking loop, Fig. 2, the cumulative action of the relay coils 11, 12 keeps the actuating coil of the switch 6 de-energized until steady conditions are attained, after which the relay is opened automatically and the final portion of the resistance brought into use to give maximum lowering velocity. Specification 173,953 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2331024A GB244850A (en) | 1924-10-02 | 1924-10-02 | Improvements in or relating to controllers for electric motors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2331024A GB244850A (en) | 1924-10-02 | 1924-10-02 | Improvements in or relating to controllers for electric motors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB244850A true GB244850A (en) | 1925-12-31 |
Family
ID=10193532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2331024A Expired GB244850A (en) | 1924-10-02 | 1924-10-02 | Improvements in or relating to controllers for electric motors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB244850A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891343A (en) * | 2015-05-22 | 2015-09-09 | 天津港汇盛码头有限公司 | Portal crane operation control system capable of accelerating descending |
-
1924
- 1924-10-02 GB GB2331024A patent/GB244850A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104891343A (en) * | 2015-05-22 | 2015-09-09 | 天津港汇盛码头有限公司 | Portal crane operation control system capable of accelerating descending |
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