CN105304243A - Voltage dependent resistor (VDR) - Google Patents
Voltage dependent resistor (VDR) Download PDFInfo
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- CN105304243A CN105304243A CN201510772619.9A CN201510772619A CN105304243A CN 105304243 A CN105304243 A CN 105304243A CN 201510772619 A CN201510772619 A CN 201510772619A CN 105304243 A CN105304243 A CN 105304243A
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- vdr
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- piezo
- voltage dependent
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Abstract
Directed at the problem of proneness to aging of conventional voltage dependent resistors, the invention provides a voltage dependent resistor, which belongs to the field of voltage dependent resistors. The voltage dependent resistor comprises a substrate; a collector electrode and a discharge electrode are arranged on the substrate; the collector electrode is metal plates prepared from a metal material and fixed relative to the substrate; the number of the metal plates is two, and the two metal plates are arranged at two opposite sides of the substrate and electrically connected; the two metal plates are fixed through a fastener, and the substrate is tightly pressed between the two metal plates; the fastener is prepared from a conductive metal material and the two metal plates are electrically connected via the fastener; and the metal plates are prepared from an aluminum material. According to the invention, surge current absorption capability of the VDR is improved; combustion of the VDR is prevented, and the VDR has a fixed surge current absorption value when a manufacturer manufactures the VDR; vibration of electromotive force generated by surge current is digested, surge current absorption capability of the VDR is improved compared with a VDR of a same kind, and current surge withstand capacity is improved by one time according to experimental results; and outbreak of a fire due to high heat formed after entering of current into a short circuit point is prevented.
Description
Technical field
The invention belongs to resistance field, particularly relate to a kind of piezo-resistance.
Background technology
Surge protector (Surge Protector) is also known as lightning protection device (being called for short SPD); be applicable in the electric power system (or communication system) of ac rated voltage 220V to 380V; the surge of indirect thunder and lightning and direct effects of lightning or other instantaneous overvoltage is protected; be applicable to the requirement of home dwelling, the tertiary industry and industrial circle surge protection; there is relative phase; relatively, phase center line, center line over the ground and the protected mode such as combination.Surge protector core devices adopts piezo-resistance usually, and piezo-resistance is a kind of resistance device with nonlinear wind vibration, is mainly used in, when circuit bears overvoltage, carrying out voltage clamping, absorbs unnecessary electric current to protect Sensitive Apparatus.English name is abbreviated as " VDR " " VoltageDependentResistor ", or is called " Varistor ".The resistor material of varistor is semiconductor, so it is a kind of semiconductor resistor.(Zn0) varistor, its material of main part has diad zinc (Zn) and hexad oxygen (0) to form.So from the angle of material, zinc oxide varistor is a kind of " II-VI group oxide semiconductor ".
Surge Protector a kind ofly provides the electronic installation of security protection for various electronic equipment, instrument and meter, communication line.When in electrical circuit or communication line because when extraneous interference produces suddenly peak current or voltage, Surge Protector can extremely short with strength in conducting shunt, thus avoid surge to the infringement of other equipment in loop.
Piezo-resistance is a kind of votage limit type protection device.Utilize the nonlinear characteristic of piezo-resistance, when overvoltage appears at two interpolars of piezo-resistance, piezo-resistance can Jiang's voltage clamping to a relatively-stationary magnitude of voltage, thus realize protection to late-class circuit.The major parameter of piezo-resistance has: pressure sensitive voltage, discharge capacity, junction capacitance, response time etc.The response time of piezo-resistance is NS level, faster than gas discharge tube, and slightly slower than TVS pipe, generally for the overvoltage protection of electronic circuit, its response speed can meet the demands.The junction capacitance of piezo-resistance is generally in the order of magnitude scope of hundreds of to several thousand pf; should not directly be applied in the protection of high-frequency signal circuit in a lot of situation; being applied in the protection of alternating current circuit and being, because its junction capacitance comparatively conference increase leakage current, needing when designing protection circuit to take into full account.The discharge capacity of piezo-resistance is comparatively large, but less than gas discharge tube.Piezo-resistance is called for short VDR, is a kind of non-linear overvoltage protection semiconductor element to voltage-sensitive.Existing piezo-resistance shortcoming have following some:
1, piezo-resistance is non-linear poor, and dynamic electric resistor is larger;
2, big current limit voltage clamp voltage is higher;
3, during low-voltage, leakage current is comparatively large, more aging;
4, the shortcoming of piezo-resistance is easily aging, in most cases can cause short circuit and can not return back to normal condition during P-N junction overload.
5, diode element under the repeated multiple times effect of surge in piezo-resistance is breakdown, it is more and more lower that the low-resistance linearisation of resistive element progressively aggravates pressure sensitive voltage, leakage current is increasing, along with the rising of VDR body temperature, leakage current is larger, form vicious circle, so that the temperature of VDR raises the burning-point reaching outer encapsulating material, this situation is referred to as high impedance short circuit (about lkQ), Joule heat makes VDR generate heat to be increased and concentrates inflow weak spot, weak spot material melts, after forming the short circuit hole of about lkQ, the electric current that power supply continues promotion one larger pours into short dot, form high heat and on fire.Result of study shows, if piezo-resistance also exists manufacturing defect, early failure occurs, the repeated multiple times effect of the surge that intensity is little, also can accelerated ageing process, and ageing failure is occurred ahead of time.
Summary of the invention
And that provide a kind of piezo-resistance easily aging for existing piezo-resistance is provided.
The present invention is achieved by the following technical solution:
Piezo-resistance, comprises matrix, and matrix is provided with collector electrode and discharge electrode, the metallic plate that the described current collection metal material that matrix is fixed very is relatively made.
Described metallic plate is two pieces, is located at the relative two sides of matrix.
Be electrically connected between two described metallic plates.
Two metallic plates are fixed by securing member, and are pressed between two metallic plates by matrix.
Described securing member is that the metal material of conduction is made, and two metallic plates are electrically connected by securing member.
The preferred aluminium material matter of described metallic plate, the metallic plate of other conductive material can certainly.
Beneficial effect of the present invention:
1. improve the through-current capability of VDR;
2. stop the burning of VDR, manufacturer VDR when manufacturing VDR has a fixing through-flow value, such as: its maximum withstand shock current capacity of the square piece of 34*34 is 40kA.When impulse current value is greater than 40KA, the electromotive force vibrations that its impulse current produces force VDR to shatter damage.
3. this patent adopts conductive metal sheet plate to fix VDR, be screwed conductive metal sheet, direct employing conductive metal sheet is as collector electrode, cleared up the vibrations of the electromotive force that impulse current produces, the through-current capability improving equal VDR the experiment proved that and improves impulse current ability one times.
4. the characteristic of conductive sheet metal material itself can be dispelled the heat rapidly, stops electric current to pour into short dot, forms high heat and on fire.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention one;
Fig. 2 is the structural representation of the embodiment of the present invention two.
Embodiment
Below in conjunction with embodiment, the invention will be further described.
Embodiment one
As shown in Figure 1, piezo-resistance, comprises matrix 1, and matrix 1 is provided with collector electrode and discharge electrode 2, it should be noted that the metallic plate 3 that the described current collection metal material that matrix is fixed very is relatively made.Metallic plate 3 can be one or more, and the present embodiment is that metallic plate is designed to two pieces, and is located at the relative two sides of matrix.Fix by securing member 4 and be electrically connected by securing member between two described metallic plates, matrix being pressed between two metallic plates.Described metallic plate is that aluminium material matter is made.The design of aluminum material is that heat radiation is fabulous, prevents matrix from burning out.Metallic plate is square.Discharge electrode is located at the middle part of a wherein side of matrix between two metallic plates.
Embodiment two
As shown in Figure 2, the difference of the present embodiment and embodiment one is: metallic plate is designed to circular plate, and is fixed by three securing members.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention, those ordinary skill in the art simple change and replace be all within protection scope of the present invention.
Claims (6)
1. piezo-resistance, comprises matrix, matrix is provided with collector electrode and discharge electrode, it is characterized in that: the metallic plate that the described current collection metal material that matrix is fixed very is relatively made.
2. piezo-resistance according to claim 1, is characterized in that: described metallic plate is two pieces, is located at the relative two sides of matrix.
3. piezo-resistance according to claim 2, is characterized in that: be electrically connected between two described metallic plates.
4. piezo-resistance according to claim 3, is characterized in that: two metallic plates are fixed by securing member, and is pressed between two metallic plates by matrix.
5. piezo-resistance according to claim 4, is characterized in that: described securing member is that the metal material of conduction is made, and two metallic plates are electrically connected by securing member.
6. according to the piezo-resistance of claim 1-5 described in middle any one claim, it is characterized in that: described metallic plate is that aluminium material matter is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772619.9A CN105304243A (en) | 2015-11-12 | 2015-11-12 | Voltage dependent resistor (VDR) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510772619.9A CN105304243A (en) | 2015-11-12 | 2015-11-12 | Voltage dependent resistor (VDR) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105304243A true CN105304243A (en) | 2016-02-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510772619.9A Pending CN105304243A (en) | 2015-11-12 | 2015-11-12 | Voltage dependent resistor (VDR) |
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| CN (1) | CN105304243A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782957A (en) * | 2017-01-17 | 2017-05-31 | 隆科电子(惠阳)有限公司 | A kind of compound MOV components with discharging structure |
| CN110400665A (en) * | 2018-04-24 | 2019-11-01 | 成都铁达电子股份有限公司 | A kind of low natural capacity piezoresistor of chip type |
| CN111128497A (en) * | 2020-01-07 | 2020-05-08 | 宁波市镇海国创高压电器有限公司 | Direct-current zinc oxide piezoresistor sheet for rail subway and preparation method thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877203A (en) * | 1981-11-02 | 1983-05-10 | 松下電器産業株式会社 | Ceramic varistor |
| CN2133033Y (en) * | 1992-07-06 | 1993-05-12 | 夏维东 | Piezoresistire resistor |
| CN201466717U (en) * | 2009-06-24 | 2010-05-12 | 百圳君耀电子（深圳）有限公司 | Lightning protection device |
| CN201804644U (en) * | 2010-09-28 | 2011-04-20 | 山东迅实电气有限公司 | Ring electrode lightning arrester for contact network of urban mass transit |
| CN103563014A (en) * | 2012-04-04 | 2014-02-05 | 音羽电机工业株式会社 | Nonlinear resistive element |
| CN205092103U (en) * | 2015-11-12 | 2016-03-16 | 郑品章 | Voltage dependent resistor |
| CN105469915A (en) * | 2015-11-05 | 2016-04-06 | 隆科电子(惠阳)有限公司 | Metal oxide varistors (MOV) component structure fixed by fastening element |
-
2015
- 2015-11-12 CN CN201510772619.9A patent/CN105304243A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877203A (en) * | 1981-11-02 | 1983-05-10 | 松下電器産業株式会社 | Ceramic varistor |
| CN2133033Y (en) * | 1992-07-06 | 1993-05-12 | 夏维东 | Piezoresistire resistor |
| CN201466717U (en) * | 2009-06-24 | 2010-05-12 | 百圳君耀电子（深圳）有限公司 | Lightning protection device |
| CN201804644U (en) * | 2010-09-28 | 2011-04-20 | 山东迅实电气有限公司 | Ring electrode lightning arrester for contact network of urban mass transit |
| CN103563014A (en) * | 2012-04-04 | 2014-02-05 | 音羽电机工业株式会社 | Nonlinear resistive element |
| CN105469915A (en) * | 2015-11-05 | 2016-04-06 | 隆科电子(惠阳)有限公司 | Metal oxide varistors (MOV) component structure fixed by fastening element |
| CN205092103U (en) * | 2015-11-12 | 2016-03-16 | 郑品章 | Voltage dependent resistor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106782957A (en) * | 2017-01-17 | 2017-05-31 | 隆科电子(惠阳)有限公司 | A kind of compound MOV components with discharging structure |
| CN106782957B (en) * | 2017-01-17 | 2019-05-17 | 隆科电子(惠阳)有限公司 | A kind of compound MOV component with discharging structure |
| CN110400665A (en) * | 2018-04-24 | 2019-11-01 | 成都铁达电子股份有限公司 | A kind of low natural capacity piezoresistor of chip type |
| CN110400665B (en) * | 2018-04-24 | 2021-09-28 | 成都铁达电子股份有限公司 | Chip type low inherent capacitance piezoresistor |
| CN111128497A (en) * | 2020-01-07 | 2020-05-08 | 宁波市镇海国创高压电器有限公司 | Direct-current zinc oxide piezoresistor sheet for rail subway and preparation method thereof |
| CN111128497B (en) * | 2020-01-07 | 2021-04-27 | 宁波市镇海国创高压电器有限公司 | Direct-current zinc oxide piezoresistor sheet for rail subway and preparation method thereof |
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Application publication date: 20160203 |