GB191011336A - A Method of Increasing the Safety of the Operations of Hoisting and Lowering wiht Induction Motors. - Google Patents
A Method of Increasing the Safety of the Operations of Hoisting and Lowering wiht Induction Motors.Info
- Publication number
- GB191011336A GB191011336A GB191011336DA GB191011336A GB 191011336 A GB191011336 A GB 191011336A GB 191011336D A GB191011336D A GB 191011336DA GB 191011336 A GB191011336 A GB 191011336A
- Authority
- GB
- United Kingdom
- Prior art keywords
- current
- motor
- arm
- resistance
- switch
- 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
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/30—Structural association of asynchronous induction motors with auxiliary electric devices influencing the characteristics of the motor or controlling the motor, e.g. with impedances or switches
Abstract
11,336. Heather, H. J. S. May 7. Electrical equipment. - Induction motors for driving winding-machinery, when used as braking- generators excited by continuous current, are provided with an ammeter or equivalent device arranged in the rotor circuit and marked at the current value corresponding to the maximum torque that the generator is capable of absorbing. The ammeter may be furnished with relay contacts for operating a signal when such current value is exceeded ; or the resistance in circuit is automatically altered, or the control gear is automatically locked, so as to prevent the current from exceeding such maximum value. As shown in Fig. 1, the motor 1 is supplied with current from the mains 5 through the reversing-switch 4 and automatic switch 6. When the shunt coil 7 is de-magnetized owing to failure of the main supply, a source of continuous current 9 is switched into the motor circuit. The battery or the like 9 is also connected to the control motor 10, and to an arm 11 which travels over contacts 12. When the current in the motor circuit exceeds ihe value corresponding to maximum torque, the solenoid 14 pulls down the arm 11 to the lowest contact 12, and the motor 10 by means of a worm gear 15, 16 and switch 17 increases the resistance in the circuit. When no current is flowing, the arm reaches the top contact 12, and the motor 10 also rotates to throw in resistance. When a current value between zero and the maximum value passes, the arm is on the middle contact and the motor 10 rotates to cut out resistance. In the arrangement shown in Fig. 2, the resistance switch is operated by the band-lever 20, and, when the maximum current is reached, the arm 11 makes contact at 12 and causes the solenoid 18 to operate the arm 19 to move one member 23 of a ratchet clutch into engagement with the other member 21. The switch then can only be moved in the direct'on to increase the resistance.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB191011336T | 1910-05-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB191011336A true GB191011336A (en) | 1911-06-07 |
Family
ID=32561684
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB191011336D Expired GB191011336A (en) | 1910-05-07 | 1910-05-07 | A Method of Increasing the Safety of the Operations of Hoisting and Lowering wiht Induction Motors. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB191011336A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805376A (en) * | 1952-10-23 | 1957-09-03 | Vickers Electrical Co Ltd | Control arrangements for braking alternating current induction motors |
-
1910
- 1910-05-07 GB GB191011336D patent/GB191011336A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2805376A (en) * | 1952-10-23 | 1957-09-03 | Vickers Electrical Co Ltd | Control arrangements for braking alternating current induction motors |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH08214576A (en) | Method and apparatus for braking synchronous motor | |
| HU9802216D0 (en) | Method for supervising a ratio switch | |
| US4542374A (en) | Switching circuit for supervising the degree of wear of commutator-contacting carbon brushes | |
| GB191011336A (en) | A Method of Increasing the Safety of the Operations of Hoisting and Lowering wiht Induction Motors. | |
| US3102219A (en) | Motor control system for electrically powered vehicles | |
| US2203907A (en) | Motor control system | |
| US2595749A (en) | Electric motor-driven installation | |
| KR20000062740A (en) | Drive with a controller for a lifting gear of a hoist, in particular a compact hoist | |
| US2501360A (en) | Control system for diesel-electric locomotives | |
| US1373621A (en) | Safety charging device for batteries | |
| US2023051A (en) | Automatically controlled electric circuit | |
| US2203920A (en) | Motor overload protection system | |
| US3133237A (en) | Rotary converter fed motor control for a vehicle | |
| US786421A (en) | System and apparatus for motor control. | |
| US1252897A (en) | Reciprocating mechanism and system of motor control therefor. | |
| US3484672A (en) | Motor reversing circuit | |
| US1540655A (en) | Electrically-operated crane, hoist, and the like | |
| US588021A (en) | Means for controlling electric motors | |
| US924666A (en) | System of control. | |
| US2628336A (en) | Variable voltage motor control system | |
| US1261644A (en) | Electric-motor control. | |
| US830158A (en) | System of motor control. | |
| US1490228A (en) | Control system | |
| US1616658A (en) | Multiple-unit electric transmission | |
| US1069061A (en) | Motor-controlling system. |