CN2052940U - Multi-function single phase electric motor switch - Google Patents
Multi-function single phase electric motor switch Download PDFInfo
- Publication number
- CN2052940U CN2052940U CN 89210627 CN89210627U CN2052940U CN 2052940 U CN2052940 U CN 2052940U CN 89210627 CN89210627 CN 89210627 CN 89210627 U CN89210627 U CN 89210627U CN 2052940 U CN2052940 U CN 2052940U
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- CN
- China
- Prior art keywords
- moving contact
- electric motor
- single phase
- motor switch
- phase electric
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- 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.)
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Abstract
A multi-function single phase electric motor switch belongs to a switching device of electric motor, comprising a base, a static contact head group, a movable contact head group, a movable contact head frame, a key component and a plurality of springs, used to control starting, running and stopping of single phase electric motor. The utility model has the advantages of compact structure, low cost, convenient operation, higher reliability, etc.
Description
Many household electrical appliance, medicine equipment and back yard industry equipment often adopt monopole asynchronous motor as power-equipment.Monophase machine comprises main winding and auxiliary winding, and main winding is used to drive the rotor running, and auxiliary winding is used to produce starting torque.The starting method of monophase machine, at present normally centrifugal switch as starting element, it is connected in the auxiliary winding loop.During electric motor starting, when rotating speed reached 70～80% synchronous speeds, centrifugal switch disconnected, and auxiliary winding and power supply are separated.Adopt the starting of this method, when line voltage descends or load when excessive, motor speed just can descend, and centrifugal switch will auto-closing when dropping to a certain degree, therefore often causes auxiliary winding to burn.The starting method of another kind of monophase machine is that starter relay is contained in the terminal box, and its sucking coil is connected in the main winding loop.During electric motor starting,, just make the actuating of relay, thereby, make auxiliary winding loop energized the normally opened contact closure because the main winding starting current is bigger.Along with motor speed raises, the electric current in the main winding reduces, and relay resets when being reduced to a certain degree, and normally opened contact separately makes the outage of auxiliary winding loop.Though this method is more reliable than centrifugal switch, cost of equipment is much higher.For household electronic products, higher cost of equipment is to be difficult for accepting for the consumer.
Both reliable in order to develop, economical and practical again monophase machine control device, the utility model have designed a kind of monophase machine switch with multiple functions such as starting, running and shutdown.
Multi-functional single-phase motor switch comprises base, fixed contact group, moving contact group, moving contact frame, button assembly and some springs.Particular component of the present utility model is the moving contact group, and the moving contact group comprises one to two high-order moving contact and one to two low level moving contact that is used to control main winding loop break-make of being used to control auxiliary winding loop break-make.Optimal design scheme is formed the moving contact group by a high-order moving contact and two low level moving contacts, break-make between high-order moving contact control auxiliary winding and the power firestreak, the break-make of one of low level moving contact control main winding and power firestreak, another low level moving contact is used to control the break-make between main winding and auxiliary winding and the zero-power line, and the purpose that this contact is set is to cause personal injury when preventing live wire and zero line misconnection.
Accompanying drawing is an embodiment of the present utility model.
Fig. 1 is the electrical schematic diagram of multi-functional single-phase motor switch and monophase machine winding line.SW is an auxiliary winding among the figure, and MW is a main winding, and a-a, b-b, c-c all represent fixed contact, and A represents high-order moving contact, and B, C represent the low level moving contact respectively.
Fig. 2 is the structure chart of multi-functional single-phase motor switch, and left figure is main cutaway view, and right figure is a part sectioned view.Comprise base 1, wiring side's pad 2, fixed contact 3, return spring 4, high-order moving contact 5, moving contact frame 6, low level moving contact 7, moving contact spring 8, button spring 9, starting button 10, slide plate spring 11 among the figure, shut down button 12, slide plate 13, sliding plate support 14 and main casing 15.
Among this embodiment, form the fixed contact group by 3 pairs of parallel fixed contacts, they are fixed on the base; Form the moving contact group by a high-order moving contact and two low level moving contacts, they and moving contact spring are installed on the moving contact frame together; Constitute button assembly by starting button, shutdown button, button spring, slide plate, sliding plate support, slide plate spring and main casing, be fixed together by screw between button assembly and the base.In addition, two return springs also are housed between base and moving contact frame.
Operation principle of the present utility model is as follows: when actuating motor, will start button and press, this moment, high-order moving contact and low level moving contact were all fitted with fixed contact, main winding loop and auxiliary winding loop while and power connection, electric motor starting.Behind the certain hour (about 0.5 second), unclamp the starting button, moving contact frame upwards lifts under the return spring effect, and high-order moving contact separates with fixed contact.After moving a segment distance on the moving contact frame, because the recess of starting button bottom is blocked by slide plate, moving contact frame stops on the ad-hoc location, and this moment, the low level moving contact was still fitted with moving contact under the compressing of moving contact spring.Therefore, the outage of auxiliary winding loop, main winding loop and power supply closure, motor enters running status.When disable motor, press the shutdown button, slide plate is thrown off the recess of starting button bottom to right translation, and moving contact frame resets under the return spring effect, and the low level moving contact separates with fixed contact, the outage of main winding loop, motor shuts down.
The utility model compact conformation, cost is lower, and is easy to use, and higher reliability is arranged, and will be subjected to users' welcome.
Claims (2)
1, multi-functional single-phase motor switch, comprise base, fixed contact group, moving contact group, moving contact frame, button assembly and some springs, it is characterized in that: the moving contact group comprises the high-order moving contact of control motor auxiliary winding loop break-make and the low level moving contact of control motor main winding loop break-make.
2, according to the described multi-functional single-phase motor switch of claim 1, it is characterized in that: the moving contact group is made up of a high-order moving contact and two low level moving contacts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89210627 CN2052940U (en) | 1989-06-01 | 1989-06-01 | Multi-function single phase electric motor switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89210627 CN2052940U (en) | 1989-06-01 | 1989-06-01 | Multi-function single phase electric motor switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2052940U true CN2052940U (en) | 1990-02-14 |
Family
ID=4866981
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89210627 Withdrawn CN2052940U (en) | 1989-06-01 | 1989-06-01 | Multi-function single phase electric motor switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2052940U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770884B (en) * | 2008-12-30 | 2013-09-25 | 鸿富锦精密工业（深圳）有限公司 | Switching device |
-
1989
- 1989-06-01 CN CN 89210627 patent/CN2052940U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101770884B (en) * | 2008-12-30 | 2013-09-25 | 鸿富锦精密工业（深圳）有限公司 | Switching device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |