CN102394495A - Dynamic thermal protection type overvoltage protector - Google Patents
Dynamic thermal protection type overvoltage protector Download PDFInfo
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- CN102394495A CN102394495A CN2011103071471A CN201110307147A CN102394495A CN 102394495 A CN102394495 A CN 102394495A CN 2011103071471 A CN2011103071471 A CN 2011103071471A CN 201110307147 A CN201110307147 A CN 201110307147A CN 102394495 A CN102394495 A CN 102394495A
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- resistance
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Abstract
The invention relates to a dynamic thermal protection type overvoltage protector. The protector is characterized in that a power input end is connected with a piezoresistor YM2 in parallel and is connected with a resistor R1 in series; the series-connected resistor R1 is a temperature sensitive PTC (Positive Temperature Coefficient) resistor, namely a restorable fuse wire; the power input end is also connected with a controllable load circuit (1) in parallel; the controllable load circuit (1) consists of a controllable load L, a trigger current limiting resistor R2, a transient suppressor D1, a bidirectional controllable silicon Q1, and an anti-interference resistor R3 and a piezoresistor YM3. The controllable load circuit (1), the piezoresistor YM2 and the resistor R1 are all manufactured to be functional modules and mounted into a shell, the leading-in terminals of the functional modules are connected with a power supply and the leading-out terminals of the functional modules are connected with the load. The overvoltage protector can be widely applied to low-power single-phase load circuits, such as home appliances, industrial control instruments, electric power detecting instruments and the like, and has the advantage of limiting the load voltage within a protection voltage range in case of over voltage, without affecting the normal operation of the load circuit.
Description
Technical field
The present invention 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.
Summary of the invention
The technical problem that the present invention 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 invention has the beneficial effects as follows: 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 an electrical schematic diagram of the present invention.
Embodiment
The present invention does 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 bidirectional triode thyristor 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 negative purpose of cutting out 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 |
|---|---|---|---|
| CN2011103071471A CN102394495A (en) | 2011-10-09 | 2011-10-09 | Dynamic thermal protection type overvoltage protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103071471A CN102394495A (en) | 2011-10-09 | 2011-10-09 | Dynamic thermal protection type overvoltage protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102394495A true CN102394495A (en) | 2012-03-28 |
Family
ID=45861707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103071471A Pending CN102394495A (en) | 2011-10-09 | 2011-10-09 | Dynamic thermal protection type overvoltage protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102394495A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882181A (en) * | 2012-09-29 | 2013-01-16 | 深圳市新国都技术股份有限公司 | Reverse protection and overvoltage protection circuit based on bidirectional silicon-controlled thyristor |
| CN105162083A (en) * | 2015-08-31 | 2015-12-16 | 国家电网公司 | overvoltage protector |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039934A (en) * | 1988-07-25 | 1990-02-21 | 约翰弗兰克制造公司 | Overvoltage crowbar |
| EP0427635A1 (en) * | 1989-11-09 | 1991-05-15 | Legrand | Power control device, in particular dimmer, with protection against short-circuit and overload |
| CN2101960U (en) * | 1991-09-12 | 1992-04-15 | 刘永生 | Over-pressure automatic protector for domestic electric appliance |
| CN2308191Y (en) * | 1997-08-12 | 1999-02-17 | 赵泽时 | Over voltage automtic power-off protection circuit |
| CN2393241Y (en) * | 1999-09-17 | 2000-08-23 | 喻扬 | Multifunction self-resetting safety fuse |
| CN2538087Y (en) * | 2002-04-04 | 2003-02-26 | 江阴长江斯菲尔电力仪表有限公司 | Power overvoltage protective instrument circuit |
| CN201001023Y (en) * | 2007-01-15 | 2008-01-02 | 上海盛善电气有限公司 | Power supply protective circuit of apparatus instrument |
| CN101552451A (en) * | 2008-12-30 | 2009-10-07 | 卢东方 | Switch power supply cycle-by-cycle wave over-voltage protection circuit |
| CN201509100U (en) * | 2009-08-06 | 2010-06-16 | 江苏斯菲尔电气有限公司 | Electricity double-power device |
| CN202260428U (en) * | 2011-10-09 | 2012-05-30 | 杭州乾龙电器有限公司 | Dynamic thermal protection type over-voltage protector |
-
2011
- 2011-10-09 CN CN2011103071471A patent/CN102394495A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1039934A (en) * | 1988-07-25 | 1990-02-21 | 约翰弗兰克制造公司 | Overvoltage crowbar |
| EP0427635A1 (en) * | 1989-11-09 | 1991-05-15 | Legrand | Power control device, in particular dimmer, with protection against short-circuit and overload |
| CN2101960U (en) * | 1991-09-12 | 1992-04-15 | 刘永生 | Over-pressure automatic protector for domestic electric appliance |
| CN2308191Y (en) * | 1997-08-12 | 1999-02-17 | 赵泽时 | Over voltage automtic power-off protection circuit |
| CN2393241Y (en) * | 1999-09-17 | 2000-08-23 | 喻扬 | Multifunction self-resetting safety fuse |
| CN2538087Y (en) * | 2002-04-04 | 2003-02-26 | 江阴长江斯菲尔电力仪表有限公司 | Power overvoltage protective instrument circuit |
| CN201001023Y (en) * | 2007-01-15 | 2008-01-02 | 上海盛善电气有限公司 | Power supply protective circuit of apparatus instrument |
| CN101552451A (en) * | 2008-12-30 | 2009-10-07 | 卢东方 | Switch power supply cycle-by-cycle wave over-voltage protection circuit |
| CN201509100U (en) * | 2009-08-06 | 2010-06-16 | 江苏斯菲尔电气有限公司 | Electricity double-power device |
| CN202260428U (en) * | 2011-10-09 | 2012-05-30 | 杭州乾龙电器有限公司 | Dynamic thermal protection type over-voltage protector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882181A (en) * | 2012-09-29 | 2013-01-16 | 深圳市新国都技术股份有限公司 | Reverse protection and overvoltage protection circuit based on bidirectional silicon-controlled thyristor |
| CN102882181B (en) * | 2012-09-29 | 2015-02-25 | 深圳市新国都技术股份有限公司 | Reverse protection and overvoltage protection circuit based on bidirectional silicon-controlled thyristor |
| CN105162083A (en) * | 2015-08-31 | 2015-12-16 | 国家电网公司 | overvoltage protector |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120328 |