CN2098730U - Double-contact centrifugal switch and protector for motor - Google Patents
Double-contact centrifugal switch and protector for motor Download PDFInfo
- Publication number
- CN2098730U CN2098730U CN 91206764 CN91206764U CN2098730U CN 2098730 U CN2098730 U CN 2098730U CN 91206764 CN91206764 CN 91206764 CN 91206764 U CN91206764 U CN 91206764U CN 2098730 U CN2098730 U CN 2098730U
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- switch
- centrifugal switch
- contact
- motor
- double
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- Centrifugal Separators (AREA)
- Induction Machinery (AREA)
Abstract
The utility model relates to a centrifugal switch with double contact points, and a motor protective device composed of the centrifugal switch. The utility model is mainly used for split phase type single-phase asynchronous motors and capacitance type single-phase asynchronous motors. An original centrifugal switch is changed into the centrifugal switch with double contact points by the utility model. A lower static contact point of the centrifugal switch is connected with the wiring point of a start winding. An upper static contact point is connected with a wire between a normal-closed switch and a normal-open switch. A moving contact point is connected with a wire between the normal-open switch and the wiring point of a running winding. Therefore, the utility model realizes motor self insurance. In other words, when a motor meets winding short circuit and open circuit, the power supply voltage is too low, and bearings are clamped, the power supply of a main and a secondary windings can be automatically cut off.
Description
The present invention relates to a kind of double-contact centrifugal switch and, be mainly used in split-phase type monopole asynchronous motor and condenser type (the band centrifugal switch) monopole asynchronous motor by the motor protecting device that this centrifugal switch constitutes.
Present centrifugal switch, because of it is a single contact, often function is less.In monopole asynchronous motor; because the starting winding wire is through thin; the number of turn is few; can not feed electric current for a long time; so this kind centrifugal switch is set; when normal operation, play protection starting winding, promptly when rotating speed reaches 75% left and right sides of rated speed, this switch by the effect of centrifugal inertial force circuitry cuts.But malfunctioning or motor is reduced to 75% when following of rated speed suddenly because of overload, mechanical breakdown cause rotating speed when centrifugal switch, and the single contact switch can not disconnect the power supply of operation winding and starting winding, thereby generation burning machine danger.
The motor protecting device that the purpose of this invention is to provide a kind of double-contact centrifugal switch and constitute by this centrifugal switch.
Centrifugal switch of the present invention comprises sedimentator, insulation board, shell fragment and upper and lower limit bit slice, it is characterized in that being provided with two moving contacts in the shell fragment above and below, is provided with upper and lower fixed contact on the upper and lower limit bit slice.
Motor protecting device of the present invention comprises double-contact centrifugal switch that is contained in the casing and the normally closed switch that is contained on the casing; normal open switch; operation winding connection point and starting winding connection point; the following fixed contact that it is characterized in that the double-contact centrifugal switch is connected with starting winding connection point; last fixed contact is connected on the lead between normally closed switch and the normal open switch, and moving contact is connected on the lead between normal open switch and the transport line winding connection point.
Motor protecting device of the present invention also can be at the other PTC element in parallel of normal open switch.
The present invention is simple in structure, and dependable performance when short circuit in winding appears in motor, opens circuit, and supply voltage is crossed low and bearing when being blocked, but the automatic cut-off motor power supply, thus realize the motor self-insurance.
The invention will be further described below in conjunction with accompanying drawing.
Fig. 1 is the perspective view of double-contact centrifugal switch of the present invention.
Fig. 2 is a contact part cutaway view among Fig. 1.
Fig. 3 is the circuit diagram of motor protecting device embodiment 1 of the present invention.
Fig. 4 is the circuit diagram of motor protecting device embodiment 2 of the present invention.
Comprise sedimentator (7), insulation board (6), shell fragment (1) and upper and lower limit bit slice (5,3) with reference to Fig. 1-2 double-contact centrifugal switch of the present invention, its improvements are, be provided with upper and lower moving contact (9,8) at shell fragment (1) upper and lower faces, on banking stop (5,3), be provided with fixed contact (2,4), before motor starting, following moving contact (8) is connected with following fixed contact (4), behind electric motor starting, because the effect of sedimentator (7) and shell fragment (1), the last moving contact (9) on the shell fragment (1) is connected with last fixed contact (2).
With reference to Fig. 3; motor protecting device of the present invention; comprise normally closed switch (10); normal open switch (11); operation winding connection point (13) and starting winding connection point (14); it is characterized in that two following fixed contacts that touch centrifugal switch (12) are connected with starting winding connection point (14), last fixed contact is connected on the lead between normally closed switch (10) and the normal open switch (11), and moving contact is connected to normal open switch (11) and moves on the lead between the winding connection point (13).During electric motor starting, connect normally closed switch, connect normal open switch again, starting winding and operation winding and power connection, when motor speed reaches rated speed 75%, disconnect owing to the effect of sedimentator centrifugal force and shell fragment elastic force makes down moving contact and following fixed contact, last moving contact is connected (promptly connect and move winding, winding is started in disconnection) with last fixed contact, and motor normally moves.When motor reduces sedimentator centrifugal force because of mechanical breakdown and disappearance or sedimentator when malfunctioning, open sedimentator is depressed shell fragment in that 1-2 is closed in second at once, at this moment, under the normal open switch acting in conjunction, the power supply of starting winding and operation winding all is disconnected.
With reference to Fig. 4, for simplifying the operation, also can be at the other PTC element (15) in parallel of normal open switch (11), after the energising, the PTC element is high-impedance state, is equivalent to a normal open switch.
Claims (3)
1, a kind of double-contact centrifugal switch comprises sedimentator, insulation board, and shell fragment and upper and lower limit bit slice is characterized in that being provided with moving contact in the shell fragment above and below, are provided with upper and lower fixed contact on the upper and lower limit bit slice.
2, a kind of motor protecting device that constitutes by the described double-contact centrifugal switch of claim 1; comprise normally closed switch, normal open switch; operation winding connection point and starting winding connection point; the following fixed contact that it is characterized in that the double-contact centrifugal switch is connected with starting winding connection point; last fixed contact is connected on the lead between normally closed switch and the normal open switch, and moving contact is connected on the lead between normal open switch and the operation winding connection point.
3, motor protecting device as claimed in claim 2 is characterized in that the other PTC element in parallel of normal open switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91206764 CN2098730U (en) | 1991-04-19 | 1991-04-19 | Double-contact centrifugal switch and protector for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91206764 CN2098730U (en) | 1991-04-19 | 1991-04-19 | Double-contact centrifugal switch and protector for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2098730U true CN2098730U (en) | 1992-03-11 |
Family
ID=4916355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91206764 Withdrawn CN2098730U (en) | 1991-04-19 | 1991-04-19 | Double-contact centrifugal switch and protector for motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2098730U (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442416C (en) * | 2004-05-27 | 2008-12-10 | 乐金电子(天津)电器有限公司 | Point contact switching device of centrifugal switch |
| CN101834551A (en) * | 2010-05-27 | 2010-09-15 | 徐东旭 | Dual-purpose energy-saving motor for limiting starting current by changing winding connection method |
| CN103151217A (en) * | 2012-12-25 | 2013-06-12 | 苏州君丰辰电子科技有限公司 | Elastic connection mechanism for automatic transfer switch device |
| CN103151192A (en) * | 2012-12-25 | 2013-06-12 | 苏州君丰辰电子科技有限公司 | Insulation fixing plate for automatic transfer switch |
| CN103151188A (en) * | 2012-12-25 | 2013-06-12 | 苏州君丰辰电子科技有限公司 | Elastic part for automatic transfer switch |
| CN103258685A (en) * | 2012-12-25 | 2013-08-21 | 苏州君丰辰电子科技有限公司 | Automatic change-over switch device |
| CN104332353A (en) * | 2012-12-25 | 2015-02-04 | 苏州贝腾特电子科技有限公司 | Centrifugal switch device of centrifugal filter |
| CN104399597A (en) * | 2012-12-25 | 2015-03-11 | 苏州贝腾特电子科技有限公司 | Centrifugal filter of compact structure for resetting elastic piece |
| CN104399603A (en) * | 2012-12-25 | 2015-03-11 | 苏州贝腾特电子科技有限公司 | Elastic piece of centrifugal switch device |
| CN104399602A (en) * | 2012-12-25 | 2015-03-11 | 苏州贝腾特电子科技有限公司 | Insulation fixing plate of centrifugal switch device |
| CN104437893A (en) * | 2012-12-25 | 2015-03-25 | 苏州贝腾特电子科技有限公司 | Centrifugal filter compact in structure |
| CN105146681A (en) * | 2012-12-25 | 2015-12-16 | 申俊 | Spin dryer with centrifugal switch device |
| CN105514704A (en) * | 2014-09-25 | 2016-04-20 | 冠捷投资有限公司 | Socket with function of prompting complete insertion of plug |
| WO2023019423A1 (en) * | 2021-08-17 | 2023-02-23 | 台州正立电机有限公司 | Bottom plate of dual-contact centrifuge switch |
-
1991
- 1991-04-19 CN CN 91206764 patent/CN2098730U/en not_active Withdrawn
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100442416C (en) * | 2004-05-27 | 2008-12-10 | 乐金电子(天津)电器有限公司 | Point contact switching device of centrifugal switch |
| CN101834551A (en) * | 2010-05-27 | 2010-09-15 | 徐东旭 | Dual-purpose energy-saving motor for limiting starting current by changing winding connection method |
| CN103151217A (en) * | 2012-12-25 | 2013-06-12 | 苏州君丰辰电子科技有限公司 | Elastic connection mechanism for automatic transfer switch device |
| CN103151192A (en) * | 2012-12-25 | 2013-06-12 | 苏州君丰辰电子科技有限公司 | Insulation fixing plate for automatic transfer switch |
| CN103151188A (en) * | 2012-12-25 | 2013-06-12 | 苏州君丰辰电子科技有限公司 | Elastic part for automatic transfer switch |
| CN103258685A (en) * | 2012-12-25 | 2013-08-21 | 苏州君丰辰电子科技有限公司 | Automatic change-over switch device |
| CN104332353A (en) * | 2012-12-25 | 2015-02-04 | 苏州贝腾特电子科技有限公司 | Centrifugal switch device of centrifugal filter |
| CN104399597A (en) * | 2012-12-25 | 2015-03-11 | 苏州贝腾特电子科技有限公司 | Centrifugal filter of compact structure for resetting elastic piece |
| CN104399603A (en) * | 2012-12-25 | 2015-03-11 | 苏州贝腾特电子科技有限公司 | Elastic piece of centrifugal switch device |
| CN104399602A (en) * | 2012-12-25 | 2015-03-11 | 苏州贝腾特电子科技有限公司 | Insulation fixing plate of centrifugal switch device |
| CN104437893A (en) * | 2012-12-25 | 2015-03-25 | 苏州贝腾特电子科技有限公司 | Centrifugal filter compact in structure |
| CN105146681A (en) * | 2012-12-25 | 2015-12-16 | 申俊 | Spin dryer with centrifugal switch device |
| CN105146683A (en) * | 2012-12-25 | 2015-12-16 | 申俊 | Spin dryer with centrifugal switch device |
| CN105514704A (en) * | 2014-09-25 | 2016-04-20 | 冠捷投资有限公司 | Socket with function of prompting complete insertion of plug |
| WO2023019423A1 (en) * | 2021-08-17 | 2023-02-23 | 台州正立电机有限公司 | Bottom plate of dual-contact centrifuge switch |
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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 |