GB591634A - Improved control device for electric motors - Google Patents
Improved control device for electric motorsInfo
- Publication number
- GB591634A GB591634A GB23909/44A GB2390944A GB591634A GB 591634 A GB591634 A GB 591634A GB 23909/44 A GB23909/44 A GB 23909/44A GB 2390944 A GB2390944 A GB 2390944A GB 591634 A GB591634 A GB 591634A
- Authority
- GB
- United Kingdom
- Prior art keywords
- motor
- contacts
- control device
- current
- opening
- 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
- 230000002159 abnormal effect Effects 0.000 abstract 3
- 238000004804 winding Methods 0.000 abstract 2
- 230000001681 protective effect Effects 0.000 abstract 1
- 230000000284 resting effect Effects 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H61/00—Electrothermal relays
- H01H61/002—Structural combination of a time delay electrothermal relay with an electrothermal protective relay, e.g. a start relay
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
- H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/42—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Protection Of Generators And Motors (AREA)
- Thermally Actuated Switches (AREA)
- Motor And Converter Starters (AREA)
- Stopping Of Electric Motors (AREA)
Abstract
591,634. Protective cut-out arrangements; thermal switches; snap - action switches; control of motors. GENERAL MOTORS CORPORATION. Nov. 30, 1944, No. 23909. Convention date, Nov. 6, 1943. [Classes 38(iii) and 38(v)] A control device 40 for disconnecting a single-phase motor 30 from the supply P1, P2 in response to an abnormal current, is modified by a thermo-responsive device in thermal relation with the motor and normally shunting part of the current to the control device but which accelerates the operation of the control device by opening the shunt in response to an abnormal motor temperature. Control device 40 comprises a thermo-electric element 47 the expansion of which causes a spring 45 to rotate a pivoted frame 41 clockwise, and conversely. Secured, one on each side of frame 41 are flexible blades 50, 60 having flexible fingers 54, 64 respectively, secured thereto, their free ends resting in notches 55, 65 in the frame 41 and arranged so that on clockwise movement of the latter, finger 54 snaps blade 50 against a stop 56 to open contacts 52, 53, before finger 64 actuates blade 60 to open contacts 62, 63. Current is supplied to the motor through the element 47 and contacts 52, 53 and 62, 63 respectively, to starting and running windings 32, 33. The heavy starting current causes element 47 to expand, thereby opening contacts 52, 53 and leaving only the running winding 33 in circuit. An overload causes further expansion of element 47 resulting in the opening of contacts 62, 63 and the disconnection of the motor from the supply. Shunting the element 47 and in thermal relation to the motor is a normally-closed thermal switch comprising a bimetallic element 71 which, in the event of the motor-temperature becoming abnormal, opens and so the entire supply current passes through element 47, and accelerates the opening of contacts 62, 63.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US236529A US2624030A (en) | 1951-07-13 | 1951-07-13 | Motor control switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB591634A true GB591634A (en) | 1947-08-25 |
Family
ID=22889900
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB23909/44A Expired GB591634A (en) | 1951-07-13 | 1944-11-30 | Improved control device for electric motors |
| GB16498/52A Expired GB703308A (en) | 1951-07-13 | 1952-07-01 | Improved temperature responsive electric switch |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB16498/52A Expired GB703308A (en) | 1951-07-13 | 1952-07-01 | Improved temperature responsive electric switch |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US2624030A (en) |
| DE (1) | DE1011967B (en) |
| FR (1) | FR1068696A (en) |
| GB (2) | GB591634A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2624030A (en) * | 1951-07-13 | 1952-12-30 | Gen Motors Corp | Motor control switch |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2734159A (en) * | 1956-02-07 | malone | ||
| US2683201A (en) * | 1952-12-23 | 1954-07-06 | Hughes Aircraft Co | Single-action switch |
| US2696539A (en) * | 1953-04-30 | 1954-12-07 | Edward W Peterson | Dual circuit electrical safety device |
| US2810045A (en) * | 1956-02-07 | 1957-10-15 | Detroit Controls Corp | Thermostat |
| NL252357A (en) * | 1959-11-28 | 1964-02-25 | ||
| FR2106758A5 (en) * | 1970-09-23 | 1972-05-05 | Peugeot & Renault | |
| US4100468A (en) * | 1977-04-04 | 1978-07-11 | Sealed Unit Parts Co., Inc. | Electric motor control and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB591634A (en) * | 1951-07-13 | 1947-08-25 | Gen Motors Corp | Improved control device for electric motors |
-
1944
- 1944-11-30 GB GB23909/44A patent/GB591634A/en not_active Expired
-
1951
- 1951-07-13 US US236529A patent/US2624030A/en not_active Expired - Lifetime
-
1952
- 1952-07-01 GB GB16498/52A patent/GB703308A/en not_active Expired
- 1952-07-10 DE DEG9326A patent/DE1011967B/en active Pending
- 1952-07-11 FR FR1068696D patent/FR1068696A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2624030A (en) * | 1951-07-13 | 1952-12-30 | Gen Motors Corp | Motor control switch |
| DE1011967B (en) * | 1951-07-13 | 1957-07-11 | Gen Motors Corp | Device for switching a single-phase motor with starting and operating winding |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1011967B (en) | 1957-07-11 |
| GB703308A (en) | 1954-02-03 |
| US2624030A (en) | 1952-12-30 |
| FR1068696A (en) | 1954-06-30 |
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