CN202260428U - Dynamic thermal protection type over-voltage protector - Google Patents
Dynamic thermal protection type over-voltage protector Download PDFInfo
- Publication number
- CN202260428U CN202260428U CN2011203855130U CN201120385513U CN202260428U CN 202260428 U CN202260428 U CN 202260428U CN 2011203855130 U CN2011203855130 U CN 2011203855130U CN 201120385513 U CN201120385513 U CN 201120385513U CN 202260428 U CN202260428 U CN 202260428U
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- resistor
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- voltage
- load
- load circuit
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Abstract
The utility model discloses a dynamic thermal protection type over-voltage protector. The input end of a power supply is connected with a voltage sensitive resistor YM2 and a controllable load circuit (1) in parallel, and is connected with a resistor R1 in series; and the serially connected resistor R1 is a thermosensitive positive temperature coefficient (PTC) resistor, so a fuse can be restored. The controllable load circuit (1) consists of a controllable load L, a triggered current-limit resistor R2, a transient suppressor D1, a duplex controllable silicon Q1, an anti-jamming resistor R3 and a voltage sensitive resistor YM3. The controllable load circuit (1), the voltage sensitive resistor YM2 and the resistor R1 are manufactured into functional modules to be arranged in a shell, wherein the wire inlet ends of the functional modules are connected with a power supply; and the wire outlet ends of the functional modules are connected with a load. The over-voltage protector can be widely applied to low-power single-phase load circuits, such as a domestic electric appliance, an industrial control instrument, a power detecting instrument and the like, and has the advantage that load voltage is limited in a protection voltage range and the normal work of the load circuit is not affected in case of overvoltage.
Description
Technical field
The utility model relates to a kind of overvoltage protector, specifically is that temperature-sensitive element is heated and dynamically adjusts voluntarily, realizes the protector of overvoltage protection.
Background technology
At present, various devices and circuit are arranged in the overvoltage crowbar of instrument and equipment, like the transient state suppressing pipe, piezo-resistance, devices such as thermistor all can be used in the overvoltage crowbar.But most of overvoltage crowbars can be cut off the electricity supply under overvoltage condition or the disconnecting consumers circuit; Is being that the PTC thermistor is when being used like piezo-resistance, transient state suppressing pipe etc. with recovering fuse; Overvoltage crowbar is under the situation of overvoltage, also damaging; Recover at voltage that equipment can not work under the normal situation, CN1039934A discloses " overvoltage crowbar " patented technology of the U.S. one company, just belongs to this kind situation.Therefore, press for a kind of circuit of design, the circuit that can under the situation of overvoltage, can protect equipment self can not break off or damage again.
The utility model content
The technical problem that the utility model will solve is to design a kind of dynamic hot protection type overvoltage protector.
Solve this technical problem and adopt following technical scheme: this dynamic hot protection type overvoltage protector, power input is parallel with piezo-resistance YM
2, be in series with resistance R
1, the resistance R of series connection
1For temperature-sensitive PTC resistance can recover fuse, power input also is parallel with the controllable load circuit.
Said controllable load circuit is by controllable load L, triggering current-limiting resistance R
2, transient state suppressing pipe D
1, bidirectional triode thyristor Q
1, anti-interference resistance R
3With piezo-resistance YM
3Form.
Said controllable load circuit, piezo-resistance YM
2And resistance R
1All be made into functional module its inlet wire termination power, the load of outlet termination are installed in the enclosure.
The beneficial effect of the utility model is: the PTC element of this protector can recover fuse and under the situation of overcurrent-overvoltage, play metering function; Load L can adjust dynamic current; Select certain resistance to make circuit a controlled dynamic range job; Protect load circuit to greatest extent, and under the voltage failure state, load circuit still can operate as normal.
Description of drawings
Accompanying drawing is the electrical schematic diagram of the utility model.
Embodiment
The utility model is done further to detail below in conjunction with embodiment and with reference to accompanying drawing: with reference to accompanying drawing, and this dynamic hot protection type overvoltage protector, power input is parallel with piezo-resistance YM
2, be in series with resistance R
1, the resistance R of series connection
1For temperature-sensitive PTC resistance can recover fuse, power input also is parallel with controllable load circuit 1.
Said controllable load circuit 1 is by controllable load L, triggering current-limiting resistance R
2, transient state suppressing pipe D
1, bidirectional triode thyristor Q
1, anti-interference resistance R
3With piezo-resistance YM
3Form.
Said controllable load circuit 1, piezo-resistance YM
2And resistance R
1All be made into functional module its inlet wire termination power, the load of outlet termination are installed in the enclosure.
D wherein
1Be the transient state suppressing pipe, its puncture voltage parameter is the threshold voltage parameter of this overvoltage protection.Through adjusting the parameter of different transient state suppressing pipes, can design the overvoltage crowbar of different voltages.
Under overvoltage condition.Transient state suppressing pipe D
1Puncture, thereby trigger orientation controllable silicon Q
1Therefore conducting makes temperature-sensitive PTC resistance R
1Just be operated in over-current state, R
1Heating causes R rapidly
1Internal resistance increase rapidly, thereby realize to reduce the purpose of load voltage.This overvoltage protection is a dynamic process, promptly under overvoltage condition, and R
1Overcurrent generates heat rapidly, and its internal resistance increases thereupon, thereby causes flowing through R
1Electric current reduce until transient state suppressing pipe D
1Breakdown triggering controllable silicon Q no longer
1, so that flow through R
1Electric current significantly reduce R
1Just slowly cooling, its internal resistance also just gradually reduces, and like this, the voltage on the load L will raise once more, to such an extent as to D
1Breakdown triggering controllable silicon Q once more
1, make R
1Shield once more.It is thus clear that said process is a dynamic process, make that finally the voltage on the load L remains at a fixing voltage range, load L is operated in the voltage range of a permission.
In the foregoing circuit, PTC element R
1Play crucial effect,, under normal condition, can recover normal again in the following metering function of the state of overcurrent-overvoltage.The effect of load L is the adjustment dynamic current, selects necessary resistance to make circuit working in a controlled dynamic range.The application of this protective circuit can be protected load circuit to greatest extent.Under the voltage failure attitude, load circuit still can operate as normal.
This dynamic hot protection type overvoltage protector can be widely used on the small power single phase load circuit, as household electrical appliance, industrial control instrument and electric power detector along etc.If be applied on the single-phase earth leakage protective circuit breaker, then be installed in the inlet wire part, can when overvoltage, load voltage be placed restrictions in the protection voltage range, and not influence the breaker circuit operate as normal.What also need explain is that T representes application load in the accompanying drawing, and L representes like controllable loads such as current limliting load resistance or releases.
Claims (3)
1. dynamic hot protection type overvoltage protector, power input is parallel with piezo-resistance YM
2, be in series with resistance R
1, it is characterized in that the resistance R of connecting
1For temperature-sensitive PTC resistance can recover fuse, power input also is parallel with controllable load circuit (1).
2. dynamic hot protection type overvoltage protector as claimed in claim 1 is characterized in that said controllable load circuit (1) is by controllable load L, triggering current-limiting resistance R
2, transient state suppressing pipe D
1, bidirectional triode thyristor Q
1, anti-interference resistance R
3With piezo-resistance YM
3Form.
3. dynamic hot protection type overvoltage protector as claimed in claim 1 is characterized in that said controllable load circuit (1), piezo-resistance YM
2And resistance R
1All be made into functional module its inlet wire termination power, the load of outlet termination are installed in the enclosure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203855130U CN202260428U (en) | 2011-10-09 | 2011-10-09 | Dynamic thermal protection type over-voltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203855130U CN202260428U (en) | 2011-10-09 | 2011-10-09 | Dynamic thermal protection type over-voltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202260428U true CN202260428U (en) | 2012-05-30 |
Family
ID=46121613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203855130U Expired - Fee Related CN202260428U (en) | 2011-10-09 | 2011-10-09 | Dynamic thermal protection type over-voltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202260428U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394495A (en) * | 2011-10-09 | 2012-03-28 | 杭州乾龙电器有限公司 | Dynamic thermal protection type overvoltage protector |
| CN108879641A (en) * | 2018-08-16 | 2018-11-23 | 安徽新在线科技股份有限公司 | A kind of full phase self-separating overvoltage protector of APB |
-
2011
- 2011-10-09 CN CN2011203855130U patent/CN202260428U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102394495A (en) * | 2011-10-09 | 2012-03-28 | 杭州乾龙电器有限公司 | Dynamic thermal protection type overvoltage protector |
| CN108879641A (en) * | 2018-08-16 | 2018-11-23 | 安徽新在线科技股份有限公司 | A kind of full phase self-separating overvoltage protector of APB |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120530 Termination date: 20171009 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |