GB548772A - Improvements in or relating to electric motor control systems - Google Patents
Improvements in or relating to electric motor control systemsInfo
- Publication number
- GB548772A GB548772A GB9039/41A GB903941A GB548772A GB 548772 A GB548772 A GB 548772A GB 9039/41 A GB9039/41 A GB 9039/41A GB 903941 A GB903941 A GB 903941A GB 548772 A GB548772 A GB 548772A
- Authority
- GB
- United Kingdom
- Prior art keywords
- field
- generator
- excited
- switch
- during
- 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
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B1/00—Control systems of elevators in general
- B66B1/02—Control systems without regulation, i.e. without retroactive action
- B66B1/06—Control systems without regulation, i.e. without retroactive action electric
- B66B1/08—Control systems without regulation, i.e. without retroactive action electric with devices, e.g. handles or levers, in the cars or cages for direct control of movements
Landscapes
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Multiple Motors (AREA)
Abstract
548,772. Control of D.C. motors. WESTING- HOUSE ELECTRIC INTERNATIONAL CO. July 17, 1941, No. 9039. Convention date, July 20, 1940. [Class 38 (iii)] A lift motor 13 is supplied from a Ward- Leonard generator 16 excited from a regulator machine R which has four fields, viz., a pattern field RPF excited under control of a car switch or of levelling switches; a differential field RDF across the generator armature to cause the generator voltage to equal that desired by the field RPF; an additive field RSF in the generator-motor loop to compensate for resistance drop with load, and a self-excited field RCF to maintain the regulator voltage at the value given by the other fields. During floor to floor runs the field RSF is partly diverted by closure of switch Kl, but during levelling this switch is open so causing greater than normal acceleration. During deceleration from high speed a resistance r4 in series with the pattern field RDF is shorted by switches Tl. Ql until a certain low speed is attained, thus giving a greater rate of deceleration. A brake is released by energization of coil 18a whenever the generator is energized. Specications 497,246 and 526,974 are referred to.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US548772XA | 1940-07-20 | 1940-07-20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB548772A true GB548772A (en) | 1942-10-23 |
Family
ID=21994081
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9039/41A Expired GB548772A (en) | 1940-07-20 | 1941-07-17 | Improvements in or relating to electric motor control systems |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB548772A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607348A (en) * | 2018-12-18 | 2019-04-12 | 佛山市昌宏电梯机械有限公司 | A kind of anti-tenesmus of elevator, hypervelocity, accidental movement protect system control lines |
-
1941
- 1941-07-17 GB GB9039/41A patent/GB548772A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109607348A (en) * | 2018-12-18 | 2019-04-12 | 佛山市昌宏电梯机械有限公司 | A kind of anti-tenesmus of elevator, hypervelocity, accidental movement protect system control lines |
| CN109607348B (en) * | 2018-12-18 | 2023-12-05 | 佛山市昌宏电梯机械有限公司 | Elevator anti-falling, overspeed and accidental movement protection system control circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1315589A (en) | Control apparatus for an elevator car | |
| GB548772A (en) | Improvements in or relating to electric motor control systems | |
| GB1385106A (en) | Control system for an electric vehicle | |
| US2313607A (en) | Variable voltage elevator control | |
| US2221610A (en) | Electrical control system | |
| GB731809A (en) | Improvements relating to electric motor control systems of the ward leonard type | |
| US1743627A (en) | Elevator control | |
| GB633577A (en) | Improvements in automatic control systems for electric locomotives | |
| US2528126A (en) | Variable voltage motor control system | |
| US1929681A (en) | Elevator control system | |
| US1810441A (en) | Motor control | |
| US1427644A (en) | Electric-elevator-control system | |
| US1756572A (en) | Motor-control system | |
| GB751082A (en) | Improvements in a driving and braking circuit for an electrically driven apparatus | |
| GB539840A (en) | Improvements in electric motor control systems | |
| GB1083722A (en) | Control systems for diesel-electric drive units | |
| GB670046A (en) | Improvements relating to electric motor control systems | |
| US1782708A (en) | Elevator-control system | |
| GB548118A (en) | Improvements in or relating to electric elevator control systems | |
| GB668404A (en) | Improvements in or relating to electric motor control systems | |
| GB720000A (en) | Improvements in and relating to electric motor control systems | |
| GB889959A (en) | Improvements relating to ward-leonard systems for cranes or other hoists | |
| GB747687A (en) | Improvements in and relating to motor equipment for electrically driven winding and like gear | |
| GB417502A (en) | Improvements in and relating to control systems for the motors of electrically driven vehicles employing regeneration for braking purposes | |
| GB510336A (en) | Improvements in and relating to electric motor control systems |