GB743765A - Improvements in or relating to polyphase dynamo-electric machines incorporating protection against overheating - Google Patents
Improvements in or relating to polyphase dynamo-electric machines incorporating protection against overheatingInfo
- Publication number
- GB743765A GB743765A GB33735/53A GB3373553A GB743765A GB 743765 A GB743765 A GB 743765A GB 33735/53 A GB33735/53 A GB 33735/53A GB 3373553 A GB3373553 A GB 3373553A GB 743765 A GB743765 A GB 743765A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tube
- windings
- machine
- heated
- dynamo
- 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
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Protection Of Generators And Motors (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
743,765. Dynamo-electric machines. WESTINGHOUSE ELECTRIC INTERNATIONAL CO. Dec. 4, 1953 [Dec. 6, 1952], No. 33735/53. Class 35. (Also in Groups XIII and XXXVII] A polyphase dynamo-electric machine is thermally protected by a thermally responsive device 7 comprising tube means containing a liquid, e.g. water or propyl alcohol, which vaporizes to actuate machine de-energizing contacts 11 at the maximum safe temperature of the machine, the tube means being disposed in close thermal relation to the windings of all the phases of the machine so as to be heated thereby and individual parts of the tube means being individually and additionally heated by the currents in the respective phases of the machine. As shown, the tube 7 is in direct thermal contact with the stator windings 3 and with a bearing at 22 of an induction motor to provide protection against overheating during running, whilst the phase currents of the windings 23... 25 pass through the tube 7 to protect against, e.g., locked rotor conditions. The tube is closed at one end and at the other end communicates with an expandable bellows or capsule device 10 which when the liquid vaporizes operates the contacts 11 connected in the maintaining circuit of a contactor 27 connected in the supply lines 26 to the motor. The tube is of electrically conductive material and while its bore is continuous the tube itself is interrupted by electrical insulators 13, 14 of e.g. glass and by connectors 15 ... 19 to 15, 17, 18 of which are connected the ends of the windings 23 ... 25, and connectors 16, 19 are interconnected by a member 20 whereby the latter connector forms the winding star point. Arrangements for delta connected and for dual voltage windings are also described. Instead of being connected in the winding circuits the tube parts may be heated by heater wires disposed around or within the tube and connected in said circuits.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US743765XA | 1952-12-06 | 1952-12-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB743765A true GB743765A (en) | 1956-01-25 |
Family
ID=22119219
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB33735/53A Expired GB743765A (en) | 1952-12-06 | 1953-12-04 | Improvements in or relating to polyphase dynamo-electric machines incorporating protection against overheating |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB743765A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001065666A1 (en) * | 2000-03-01 | 2001-09-07 | Robert Bosch Gmbh | Fail-safe mechanism for dc-drive |
-
1953
- 1953-12-04 GB GB33735/53A patent/GB743765A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001065666A1 (en) * | 2000-03-01 | 2001-09-07 | Robert Bosch Gmbh | Fail-safe mechanism for dc-drive |
| US6759823B2 (en) | 2000-03-01 | 2004-07-06 | Robert Bosch Gmbh | Fail-safe mechanism for dc-drive |
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