CN203491666U - Full-automatic electronic appliance over-voltage protection circuit - Google Patents
Full-automatic electronic appliance over-voltage protection circuit Download PDFInfo
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- CN203491666U CN203491666U CN201320585814.7U CN201320585814U CN203491666U CN 203491666 U CN203491666 U CN 203491666U CN 201320585814 U CN201320585814 U CN 201320585814U CN 203491666 U CN203491666 U CN 203491666U
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- positive pole
- electric capacity
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Abstract
The utility model discloses a full-automatic electronic appliance over-voltage protection circuit, comprising first to eleventh diodes, a transformer, first to fifth capacitors, first to twelfth resistors, first and second light emitting diodes, first and second variable resistors, a time-base integrated chip, a large-power integrated switch, a bidirectional silicon controlled rectifier, and an electronic appliance socket. When the voltage of a power grid is higher than 250 V or lower than 170 V, the time-base integrated chip is in a protection state and provides no pulse output; the output and input terminals of the large-power integrated switch are both in low level; the bidirectional silicon controlled rectifier is cut off; and thus, an electronic appliance is powered off. According to the utility model, not only can the circuit be cut off automatically when the voltage is over high, but also the circuit can be started automatically when the voltage restores to be normal. The protection circuit is convenient to use and is also advantaged by simple in circuit structure, small in number of adopted elements, low in cost, and beneficial for popularization, in comparison with similar circuits in the prior art.
Description
Technical field
The utility model relates to a kind of electronic apparatus protective circuit, relates in particular to a kind of full-automatic electronic electrical equipment overvoltage crowbar.
Background technology
The overvoltage protector of electronic apparatus is at the supply voltage when protected circuit during higher than certain numerical value, and protector cuts off this circuit; When supply voltage returns to normal range (NR), protector is connected automatically.And overvoltage protector of the prior art only has the function of auto power off; and do not there is the function of automatic Power resumption; therefore also there is room for improvement in overvoltage protector of the prior art; and overvoltage protector circuit structure of the prior art is complicated, adopt element many; with high costs, be unfavorable for universal and promote.
Utility model content
The purpose of this utility model provides a kind of full-automatic electronic electrical equipment overvoltage crowbar with regard to being in order to address the above problem.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The utility model comprises transformer, the first diode to the 11 diodes, the first resistance to the 12 resistance, the first electric capacity to the five electric capacity, the first light-emitting diode, the second light-emitting diode, the first variable resistor, the second adjustable resistance, time base integrated chip, high-power integrated switch, bidirectional triode thyristor and appliance socket, the first end of described primary is connected with the zero line of AC power and the first end of described appliance socket simultaneously, the second end while of described primary and the live wire of described AC power, described the 12 first end of resistance and the first end of described bidirectional triode thyristor are connected, the first end of described transformer secondary output is connected with the positive pole of described the first diode, the second end of described transformer secondary output is connected with the positive pole of described the second diode, the tap while of described transformer secondary output and the negative pole of described the first light-emitting diode, the first end of described the first electric capacity, the first end of described the second electric capacity, described the first variable-resistance first end, the first end of described the second adjustable resistance, the first end of described the 6th resistance, the positive pole of described the 7th diode, the negative pole of base integrated chip when described, the positive pole of described the 8th diode, the first end of described the 8th resistance, the first end of described the 4th electric capacity, the first end of described the 5th electric capacity, the negative pole of described high-power integrated switch, the second end of described appliance socket, the second end of the first end of described the 6th electric capacity and described bidirectional triode thyristor is connected, the negative pole while of described the first diode and the first end of described the first resistance, the positive pole of described the 3rd diode is connected with the first end of described the 5th resistance, the negative pole of described the second diode is connected with the positive pole of described the 4th diode, the second end of described the first resistance is connected with the positive pole of described the first light-emitting diode, the negative pole while of described the 4th diode and the second end of described the first electric capacity, the replacement end of base integrated chip when described, the positive pole of base integrated chip when described, described the 9th first end of resistance and the first end of described high-power integrated switch are connected, the negative pole while of described the 3rd diode and the second end of described the second diode, the first end of described the second resistance is connected with the first end of described the 3rd resistance, the second end of described the second resistance is connected with the negative pole of described the 6th diode with the first end of described the 4th resistance simultaneously, the second end of described the 4th resistance is connected with described first variable-resistance the second end, the second end of described the 3rd resistance is connected with the positive pole of described the 5th diode and the second end of described the second adjustable resistance simultaneously, the second end of described the 5th resistance is connected with the second end of described the 6th resistance, the negative pole of described the 5th diode is connected with the trigger end of the first end of described the 7th resistance base integrated chip when described simultaneously, the anodal of described the 6th diode is connected with the control end of the second end of described the 7th resistance base integrated chip when described simultaneously, when described, the replacement keyed end of base integrated chip is connected with the positive pole of described the tenth diode, the negative pole of described the tenth diode is connected with the negative pole of described the 7th diode, when described, the signal output part of base integrated chip is connected with the first end of described the 3rd electric capacity, the second end of described the 3rd electric capacity is connected with the positive pole of described the 9th diode with the negative pole of described the 8th diode simultaneously, the negative pole while of described the 9th diode and the second end of described the 8th resistance, the second end of described the 4th electric capacity is connected with the negative pole of described the 11 diode, described the 11 positive pole of diode and the control end of described high-power integrated switch are connected, the second end of described the 9th resistance is connected with the second end of described the 5th electric capacity, the second end of described high-power integrated switch is connected with the first end of described the tenth resistance with the first end of described the 11 resistance simultaneously, the second end of described the tenth resistance is connected with the positive pole of described the second light-emitting diode, the negative pole of described the second light-emitting diode is connected with the second end of described the 11 resistance and the control end of described bidirectional triode thyristor simultaneously.
The beneficial effects of the utility model are:
The utility model not only can be when overtension automatic shutoff circuit, but also can be when voltage recovers normal automatic starting circuit, easy to use, and the utility model compared with prior art also has, and circuit structure is simple, employing element is few, with low cost, be conducive to popularization.
Accompanying drawing explanation
Fig. 1 is circuit structure schematic diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1: the utility model comprises transformer T, the first diode D1 to the 11 diode D12, the first resistance R 1 to the 12 resistance R 12, the first capacitor C 1 is to the 5th capacitor C 5, the first LED 1, the second LED 2, the first variable resistor W1, the second adjustable resistance W2, time basis set become chip IC 1, high-power integrated switch IC2, bidirectional triode thyristor SCR and appliance socket CZ, the elementary first end of transformer T is connected with the first end of appliance socket CZ with the zero line of AC power simultaneously, elementary the second end of transformer T simultaneously with the live wire of AC power, the first end of the 12 resistance R 12 is connected with the first end of bidirectional triode thyristor SCR, the first end of T level of transformer is connected with the positive pole of the first diode D1, the second end of T level of transformer is connected with the positive pole of the second diode D2, the tap while of T level of transformer and the negative pole of the first LED 1, the first end of the first capacitor C 1, the first end of the second capacitor C 2, the first end of the first variable resistor W1, the first end of the second adjustable resistance W2, the first end of the 6th resistance R 6, the positive pole of the 7th diode D7, time basis set become the negative pole of chip IC 1, the positive pole of the 8th diode D8, the first end of the 8th resistance R 8, the first end of the 4th capacitor C 4, the first end of the 5th capacitor C 5, the negative pole of high-power integrated switch IC2, the second end of appliance socket CZ, the second end of the first end of the 6th capacitor C 6 and bidirectional triode thyristor SCR is connected, the negative pole while of the first diode D1 and the first end of the first resistance R 1, the positive pole of the 3rd diode D3 is connected with the first end of the 5th resistance R 5, the negative pole of the second diode D2 is connected with the positive pole of the 4th diode D4, the second end of the first resistance R 1 is connected with the positive pole of the first LED 1, the negative pole while of the 4th diode D4 and the second end of the first capacitor C 1, time basis set become the replacement end of chip IC 1, time basis set become the positive pole of chip IC 1, the first end of the 9th resistance R 9 is connected with the first end of high-power integrated switch IC2, the negative pole while of the 3rd diode D3 and the second end of the second diode D2, the first end of the second resistance R 2 is connected with the first end of the 3rd resistance R 3, the second end of the second resistance R 2 is connected with the negative pole of the 6th diode D6 with the first end of the 4th resistance R 4 simultaneously, the second end of the 4th resistance R 4 is connected with the second end of the first variable resistor W1, the second end of the 3rd resistance R 3 is connected with the positive pole of the 5th diode D5 and the second end of the second adjustable resistance R2 simultaneously, the second end of the 5th resistance R 5 is connected with the second end of the 6th resistance R 6, the negative pole of the 5th diode D5 simultaneously with the first end of the 7th resistance R 7 with time basis set become the trigger end of chip IC 1 to be connected, the 6th diode D6 anodal simultaneously with the second end of the 7th resistance R 7 with time basis set become the control end of chip IC 1 to be connected, time basis set become the replacement keyed end of chip IC 1 to be connected with the positive pole of the tenth diode R12, the negative pole of the tenth diode R12 is connected with the negative pole of the 7th diode D7, time basis set become the signal output part of chip IC 1 to be connected with the first end of the 3rd capacitor C 3, the second end of the 3rd capacitor C 3 is connected with the positive pole of the 9th diode D9 with the negative pole of the 8th diode D8 simultaneously, the negative pole while of the 9th diode D9 and the second end of the 8th resistance R 8, the second end of the 4th capacitor C 4 is connected with the negative pole of the 11 diode D11, the positive pole of the 11 diode D11 is connected with the control end of high-power integrated switch IC2, the second end of the 9th resistance R 9 is connected with the second end of the 5th capacitor C 5, the second end of high-power integrated switch IC2 is connected with the first end of the tenth resistance R 10 with the first end of the 11 resistance R 11 simultaneously, the second end of the tenth resistance R 10 is connected with the positive pole of the second LED 2, the negative pole of the second LED 2 is connected with the control end of bidirectional triode thyristor SCR with the second end of the 11 resistance R 11 simultaneously.
As shown in Figure 1: during normal power supply, the first diode D1 basis set when pulse voltage after the second diode D2 rectification adds to becomes trigger end and the replacement keyed end of chip IC 1, after the 3rd diode D3 rectifying and wave-filtering, compare with reference voltage, while making, basis set becomes the pulse voltage of output output rectangle of chip IC 1 through the 3rd capacitor C 3, the tenth diode D10 is to the 4th capacitor C 4 chargings, the 4th diode D4 rectifying and wave-filtering direct voltage adds to control end and the input of high-power integrated switch IC2, the output output high level of high-power integrated switch IC2 triggers bidirectional triode thyristor SCR conducting, electrical appliance obtains electric work, when line voltage is greater than 250V or is less than 170V, time basis set become chip IC 1 to export in hold mode no pulse, the output of high-power integrated switch IC2 all becomes low level with input, bidirectional triode thyristor SCR cut-off, electrical appliance power-off, while restoring electricity again after grid power blackout, because of the former discharge off of the 4th capacitor C 4, while restoring electricity, need be through one section of delay time, the 4th capacitor C 4 charges to after high potential by the 9th resistance R 9, high-power integrated switch IC2 just exports high level and triggers bidirectional triode thyristor SCR conducting, this Rio time delay 5 minutes.
Claims (1)
1. a full-automatic electronic electrical equipment overvoltage crowbar, it is characterized in that: comprise transformer, the first diode to the 11 diodes, the first resistance to the 12 resistance, the first electric capacity to the five electric capacity, the first light-emitting diode, the second light-emitting diode, the first variable resistor, the second adjustable resistance, time base integrated chip, high-power integrated switch, bidirectional triode thyristor and appliance socket, the first end of described primary is connected with the zero line of AC power and the first end of described appliance socket simultaneously, the second end while of described primary and the live wire of described AC power, described the 12 first end of resistance and the first end of described bidirectional triode thyristor are connected, the first end of described transformer secondary output is connected with the positive pole of described the first diode, the second end of described transformer secondary output is connected with the positive pole of described the second diode, the tap while of described transformer secondary output and the negative pole of described the first light-emitting diode, the first end of described the first electric capacity, the first end of described the second electric capacity, described the first variable-resistance first end, the first end of described the second adjustable resistance, the first end of described the 6th resistance, the positive pole of described the 7th diode, the negative pole of base integrated chip when described, the positive pole of described the 8th diode, the first end of described the 8th resistance, the first end of described the 4th electric capacity, the first end of described the 5th electric capacity, the negative pole of described high-power integrated switch, the second end of described appliance socket, the second end of the first end of described the 6th electric capacity and described bidirectional triode thyristor is connected, the negative pole while of described the first diode and the first end of described the first resistance, the positive pole of described the 3rd diode is connected with the first end of described the 5th resistance, the negative pole of described the second diode is connected with the positive pole of described the 4th diode, the second end of described the first resistance is connected with the positive pole of described the first light-emitting diode, the negative pole while of described the 4th diode and the second end of described the first electric capacity, the replacement end of base integrated chip when described, the positive pole of base integrated chip when described, described the 9th first end of resistance and the first end of described high-power integrated switch are connected, the negative pole while of described the 3rd diode and the second end of described the second diode, the first end of described the second resistance is connected with the first end of described the 3rd resistance, the second end of described the second resistance is connected with the negative pole of described the 6th diode with the first end of described the 4th resistance simultaneously, the second end of described the 4th resistance is connected with described first variable-resistance the second end, the second end of described the 3rd resistance is connected with the positive pole of described the 5th diode and the second end of described the second adjustable resistance simultaneously, the second end of described the 5th resistance is connected with the second end of described the 6th resistance, the negative pole of described the 5th diode is connected with the trigger end of the first end of described the 7th resistance base integrated chip when described simultaneously, the anodal of described the 6th diode is connected with the control end of the second end of described the 7th resistance base integrated chip when described simultaneously, when described, the replacement keyed end of base integrated chip is connected with the positive pole of described the tenth diode, the negative pole of described the tenth diode is connected with the negative pole of described the 7th diode, when described, the signal output part of base integrated chip is connected with the first end of described the 3rd electric capacity, the second end of described the 3rd electric capacity is connected with the positive pole of described the 9th diode with the negative pole of described the 8th diode simultaneously, the negative pole while of described the 9th diode and the second end of described the 8th resistance, the second end of described the 4th electric capacity is connected with the negative pole of described the 11 diode, described the 11 positive pole of diode and the control end of described high-power integrated switch are connected, the second end of described the 9th resistance is connected with the second end of described the 5th electric capacity, the second end of described high-power integrated switch is connected with the first end of described the tenth resistance with the first end of described the 11 resistance simultaneously, the second end of described the tenth resistance is connected with the positive pole of described the second light-emitting diode, the negative pole of described the second light-emitting diode is connected with the second end of described the 11 resistance and the control end of described bidirectional triode thyristor simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320585814.7U CN203491666U (en) | 2013-09-23 | 2013-09-23 | Full-automatic electronic appliance over-voltage protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320585814.7U CN203491666U (en) | 2013-09-23 | 2013-09-23 | Full-automatic electronic appliance over-voltage protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203491666U true CN203491666U (en) | 2014-03-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320585814.7U Expired - Fee Related CN203491666U (en) | 2013-09-23 | 2013-09-23 | Full-automatic electronic appliance over-voltage protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203491666U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467471A (en) * | 2014-11-05 | 2015-03-25 | 成都美益达医疗科技有限公司 | Power source overvoltage protector of blood centrifugal machine |
| WO2018153000A1 (en) * | 2017-02-22 | 2018-08-30 | 中领世能（天津）科技有限公司 | Over-voltage protection apparatus and power supply system |
-
2013
- 2013-09-23 CN CN201320585814.7U patent/CN203491666U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104467471A (en) * | 2014-11-05 | 2015-03-25 | 成都美益达医疗科技有限公司 | Power source overvoltage protector of blood centrifugal machine |
| WO2018153000A1 (en) * | 2017-02-22 | 2018-08-30 | 中领世能（天津）科技有限公司 | Over-voltage protection apparatus and power supply system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140319 Termination date: 20140923 |
|
| EXPY | Termination of patent right or utility model |