CN201383446Y - Compound type contact arc extinguishing device - Google Patents
Compound type contact arc extinguishing device Download PDFInfo
- Publication number
- CN201383446Y CN201383446Y CN200820204264U CN200820204264U CN201383446Y CN 201383446 Y CN201383446 Y CN 201383446Y CN 200820204264 U CN200820204264 U CN 200820204264U CN 200820204264 U CN200820204264 U CN 200820204264U CN 201383446 Y CN201383446 Y CN 201383446Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- piezo
- arc extinguishing
- type contact
- contact arc
- 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 - Lifetime
Links
Images
Abstract
The utility model relates to a compound type contact arc extinguishing device, A PTC thermal resistor is welded and bonded with a piezoresistor by stannum paste or conductive silver paste, leading wires are respectively welded on a positive surface and a negative surface, and the compound type contact arc extinguishing device is packed by organic silicon resin or phenolic resin. In the compound type contact arc extinguishing device, the PTC thermal resistor has quicker protection speed by electric current and temperature generated when the piezoresistor responds to overvoltage; and after the thermal resistor responds, a partial pressure function conversely protects the piezoresistor.
Description
Technical field
The utility model relates to a kind of compound contact arc-control device.
Background technology
At present in numerous industrial circuit control fields and household electrical appliance control circuit; generally select for use miniature relay or controllable silicon to come the break-make related load; when the load of break-make object is an inductive load; during as inductor, A.C. contactor and motor etc.; the moment that disconnects in the contact; the inverse electromotive force of a high potential that can produce; at this moment the 5-10 of voltage doubly before the voltage that is added in the two ends, contact can reach usually and disconnect; the air ionization that this voltage can make the place, contact disconnect moment forms HNO3; air can conduct electricity; use between the contact and form short-circuit condition, be commonly called as the arcing phenomenon.At this moment metal material is easy to Yin Gaowen and ablates, and has a strong impact on its useful life.
In the actual at present use, the following two kinds of arc-control device schemes of general employing: first kind is adopted RC capacitance-resistance loop, as accompanying drawing 1: utilize inverse electromotive force in electric capacity electrical equipment repeated charge process, resistance can produce heat and distribute heat comes consumed energy and then reduces high-tension influence gradually; Second kind is adopted piezo-resistance, as shown in Figure 2, utilizes the good nonlinear characteristic of piezo-resistance to absorb this transient overvoltage.
Yet all there is defective in above-mentioned two kinds of arc extinguishing schemes, in first kind of scheme, when series resistance is big, the time that discharges and recharges of electric capacity can be elongated, and arc quenching effect is bad, and because there is the lightly conducting state in electric capacity, make load charged, it can not get shutoff effect clearly; And when series resistance hour, the self-energy heat loss is less, the repeated charge process is elongated, can have long overvoltage time, resistance itself is damage easily.In second kind of scheme, piezo-resistance can be aging gradually in overvoltage repeatedly and after continuing to bear high pressure and weakens its effective clamping action, even itself more easily becomes a fault point.In order to reduce the probability that piezo-resistance itself breaks down; when using piezo-resistance to do arc extinguishing control, have to select the pressure sensitive voltage of piezo-resistance than higher; when protection voltage is higher; the superpotential chance of piezo-resistance is less; effect is very undesirable in the actual use, and the time, just there was damage long slightly contact.
The utility model content
The purpose of this utility model is to provide a kind of compound contact arc-control device.
This compound contact arc-control device comprises PTC thermistor and piezo-resistance, by tin slurry welding or conductive silver paste PTC thermistor and piezo-resistance are bonded together, just, the back side respectively welds a lead-in wire, encapsulate with organic siliconresin or phenolic resins.
Electric current when utilizing the response of piezo-resistance overvoltage in this compound contact arc-control device and temperature make PTC thermistor protection speed faster, utilize the dividing potential drop effect after thermistor responds conversely piezo-resistance to be protected.
The nonlinear characteristic of piezo-resistance has absorbed the high pressure that contact disconnection moment inverse electromotive force produces in this compound contact arc-control device, makes the place, contact not reach the condition of high voltage that produces arcing.
Piezo-resistance is subjected to the protection of PTC thermistor and not fragile in this compound contact arc-control device, has selected the lower piezo-resistance of clamp voltage.
Description of drawings
Accompanying drawing 1 shows the arc extinguishing scheme in available technology adopting RC capacitance-resistance loop.
Accompanying drawing 2 shows the arc extinguishing scheme of available technology adopting piezo-resistance.
Accompanying drawing 3 shows the compound contact arc-control device of employing PTC thermistor of the present utility model and piezo-resistance.
Accompanying drawing 4 shows the front view of compound contact of the present utility model arc-control device.
Accompanying drawing 5 shows the end view of compound contact of the present utility model arc-control device.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.
As shown in Figure 3; the back place in circuit closely welds PTC thermistor 1 and piezo-resistance 2 or bonds together; disconnect moment; the inverse electromotive force that inductive load 3 produces makes piezo-resistance 2 responses; self produces heat; and heat sends PTC thermistor 1 to; learn by formula W=I2RT that again the electric current that flows through PTC thermistor 1 self also can impel PTC thermistor 1 temperature to raise, under the double influence; PTC thermistor 1 heats up rapidly; response time is short, and very fast several orders of magnitude of rising of resistance share most of voltage on the piezo-resistance; piezo-resistance 2 both end voltage reduce, and piezo-resistance 2 is protected.Owing to be that PTC thermistor 1 bears high pressure and consumed energy, the low-voltage at two ends, contact is not enough to cause the arcing phenomenon, reaches arc quenching effect simultaneously.So do not worrying under the prerequisite that piezo-resistance 2 can be damaged; with the scope of the pressure sensitive voltage of piezo-resistance 2 design at 431V; guarantee that promptly piezo-resistance 2 can respond under low voltage, also guaranteed the response time faster can play extraordinary protection effect simultaneously the contact.
Shown in accompanying drawing 4 and accompanying drawing 5, the utility model is by a PTC thermistor 1 and the compound device that two pins 4 are arranged that piezo-resistance 2 is packaged together, wherein PTC thermistor 1 and piezo-resistance 2 are bonded together by welding of tin slurry or conductive silver paste, just, the back side respectively welds a pin 4, encapsulate with organic siliconresin or phenolic resins at last.The protection parameter such as the following table of pressure-sensitive and temperature-sensitive:
Behind this device place in circuit; during the circuit operate as normal; as shown in Figure 3; the voltage that is added in after the closing of contact on the contact is zero substantially; this compound arc-control device is failure to actuate; the moment that disconnects in the contact; because the good nonlinear characteristic of piezo-resistance; its resistance sharply reduces and electric current sharply increases after the overvoltage, rapidly with this high voltage clamper in the pressure sensitive voltage scope, the thermistor that is packaged together with it is because the heat of piezo-resistance transmits and the self heat accumulation; temperature rises very fast; resistance presents the rank property variation that jumps, and a rising 2-3 order of magnitude is shared the most of voltage that falls to be added on the piezo-resistance; reach the purpose of protection piezo-resistance; owing to the effect of temperature-sensitive dividing potential drop, being added in contact two-end-point voltage can reduce rapidly simultaneously, does not reach the condition that produces electric arc; finally reach the purpose of protection contact; after the contact disconnected and finishing, the operating voltage that is added in its two ends was lower than the conducting voltage of piezo-resistance, and compound device quits work.
This utility model is owing to adopted following 2 problems that solve the arcing ablation of contact: first is to utilize the nonlinear characteristic of piezo-resistance excellence in the arc-control device of compound contact to sponge the high pressure that the contact disconnects moment inverse electromotive force generation, makes the place, contact not reach the condition of high voltage that produces arcing and protects the contact; Second is to utilize piezo-resistance in the arc-control device of compound contact can be subjected to the protection of PTC thermistor and non-damageable characteristics, greatly reduces the pressure sensitive voltage of piezo-resistance, makes arc quenching effect more obvious.Therefore, this device can be accomplished the arc quenching effect more excellent than existing apparatus.
The excellent part of this utility model also is to be the pure resistance absorption circuit, can not produce other influence to circuit.The response voltage of this utility model is lower, and arc quenching effect is very good, and is more thorough to contact protection.And this utility model is two end devices, and is nonpolarity, uses installation very convenient.
Claims (1)
1, a kind of compound contact arc-control device, comprising PTC thermistor and piezo-resistance, by tin slurry welding or conductive silver paste PTC thermistor and piezo-resistance are bonded together, just, the back side respectively welds a lead-in wire, encapsulate with organic siliconresin or phenolic resins at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820204264U CN201383446Y (en) | 2008-11-28 | 2008-11-28 | Compound type contact arc extinguishing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200820204264U CN201383446Y (en) | 2008-11-28 | 2008-11-28 | Compound type contact arc extinguishing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201383446Y true CN201383446Y (en) | 2010-01-13 |
Family
ID=41526917
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200820204264U Expired - Lifetime CN201383446Y (en) | 2008-11-28 | 2008-11-28 | Compound type contact arc extinguishing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201383446Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112908750A (en) * | 2020-12-30 | 2021-06-04 | 深圳市劲阳电子有限公司 | Arc-extinguishing relay, arc-extinguishing device and arc-extinguishing method |
-
2008
- 2008-11-28 CN CN200820204264U patent/CN201383446Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112908750A (en) * | 2020-12-30 | 2021-06-04 | 深圳市劲阳电子有限公司 | Arc-extinguishing relay, arc-extinguishing device and arc-extinguishing method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202678007U (en) | Varistor with self-protection function | |
| CN201383446Y (en) | Compound type contact arc extinguishing device | |
| CN102403705A (en) | Thermistor type over-current and over-voltage protection device | |
| CN203352914U (en) | LED protection device | |
| CN203415950U (en) | Electricity-using device input soft start resistor protection circuit | |
| CN102426982A (en) | Built-in protector for compressor | |
| CN204376498U (en) | Based on the electric automobile high-voltage pre-charge circuit of PTC resistance | |
| CN102751707A (en) | Overcurrent and overvoltage protector with bimetallic strip temperature switch | |
| CN204516710U (en) | Overcurrent, overload, overheat protector | |
| CN106655139A (en) | Novel surge protector | |
| CN208908204U (en) | A kind of overheat overcurrent power-off protection device | |
| CN101887790B (en) | Piezoresistor for lightning protection | |
| CN203553916U (en) | Safety protection apparatus with function of automatic releasing for surge protection device in overheating state | |
| CN202888538U (en) | Manual reset overload overtemperature protection plug | |
| CN207116352U (en) | A kind of breaker contact system and breaker | |
| CN201946505U (en) | Thermal protector for rechargeable battery pack | |
| CN207503820U (en) | A kind of pneumatic type low tension switch | |
| CN201966602U (en) | Disc-shaped heat-voltage-sensitive energy storage overvoltage absorber | |
| CN203607823U (en) | Dry-type transformer coil short circuit protector | |
| WO1995027302A1 (en) | Protective device against thermal overload for a small high-heat-load electric motor | |
| CN202663099U (en) | Over-current and over-voltage protector with bimetallic-strip temperature switch | |
| CN202586273U (en) | Temperature protection device for socket | |
| CN204794006U (en) | Domestic appliance protection switch | |
| CN204458174U (en) | A kind of high-power commercial car overheating of starter protective gear | |
| CN102412572A (en) | Temperature switch type over-voltage protection circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100113 |
|
| CX01 | Expiry of patent term |