CN103178576B - High-current protector - Google Patents
High-current protector Download PDFInfo
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- CN103178576B CN103178576B CN201210404351.XA CN201210404351A CN103178576B CN 103178576 B CN103178576 B CN 103178576B CN 201210404351 A CN201210404351 A CN 201210404351A CN 103178576 B CN103178576 B CN 103178576B
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Abstract
The present invention relates to a kind of high-current protector. the present invention can solve big capacity electrolyte capacitor momentary charge can cause sparking for binding post, have safety and print hidden danger, lower terminal surface irregularity can be docked simultaneously, affect product and use problem, its drip irrigation device is: include controlling switch and voltage stabilizing chip, the input of voltage stabilizing chip is connected with input power by controlling switch, high-current protector also includes delays time to control chip, control circuit, contactor circuit and capacitor bank circuit, the input of delays time to control chip is connected with the outfan of voltage stabilizing chip, the outfan of delays time to control chip is connected with the input of control circuit, the end that controls of control circuit is connected with the control end of contactor circuit, the input of contactor circuit is connected with input power, the outfan of contactor circuit is connected with the input of high-power inverter or high power load by capacitance group circuit. the present invention is enough in high-power inverter or the protection of high power load arc protection.
Description
Technical field
The present invention is a kind of circuit protection device, particularly relates to a kind of high-current protector protected for high-power inverter or high power load arc protection.
Background technology
Domestic and international inverter input terminal all adopts the pattern that the electric wire according to size of current different cross-sectional and binding post are attached, the advantage of this pattern is that cost is economized, expense is low, but shortcoming is also fairly obvious, it is simply that when high-power, owing to electric current increases, although adopting sectional area of wire to increase, but have two critical defects to solve, one be if the user while use time wrong polarity, inverter can be caused and burns. Two is owing to inverter self big capacity electrolyte capacitor momentary charge can cause sparking for binding post, not only has safety and prints hidden danger, can dock lower terminal surface irregularity simultaneously. Affect product to use. Develop and a can prevent reversal connection, the inverter input equipment of sparking can be prevented again, to improving the result of use of inverter and promoting level of security when user uses, there is extremely important meaning. Same, for powerful load, equally exist and need to prevent the sparking situation of moment, so, a kind of research and development for high-power inverter or the high-current protector of high power load arc protection protection are imperative now.
China Patent Publication No.: CN202172297U, publication date on March 21st, 2012, discloses a kind of reverse connection preventing firing circuit, including: the first resistance, the second resistance, the 3rd resistance, the first switching tube, second switch pipe and the 3rd electric capacity; Described first resistance is connected between the drain electrode of described first switching tube and the drain electrode of described second switch pipe; The drain electrode of described first switching tube is connected to negative output terminal or the positive output end of power supply;The drain electrode of described second switch pipe is connected to negative pole or the positive pole of accumulator; The grid of described second switch pipe is connected with positive output end or the negative output terminal of described power supply; Described first switching tube source electrode is connected with the source electrode of described second switch pipe; Described second resistance is connected between the grid of described first switching tube and the grid of described second switch pipe; Described 3rd resistance is connected between the source electrode of described second switch pipe and the grid of described second switch pipe; Described 3rd electric capacity is connected between the source electrode of described first switching tube and the grid of described first switching tube. This technical scheme can provide certain anti-Protection of arcing; but; what this technical scheme adopted is simple Low-voltage Electronic device; anti-Protection of arcing for big electric current is helpless, when being particularly applied in high-power inverter, in the face of instantaneous big electric current; Low-voltage Electronic device; completely helpless, it is impossible to play the effect of anti-sparking, there is also various fault.
Summary of the invention
It is an object of the invention to there is big capacity electrolyte capacitor momentary charge for solution current technology scheme and can cause sparking for binding post; not only have safety and print hidden danger; lower terminal surface irregularity can be docked simultaneously; affect product and use problem, it is provided that a kind of high-current protector protected for high-power inverter or high power load arc protection.
The technical solution adopted for the present invention to solve the technical problems is: a kind of high-current protector, arc protection for high-power inverter or high power load is protected, including controlling switch and voltage stabilizing chip, the input of voltage stabilizing chip is connected with input power by controlling switch, high-current protector also includes delays time to control chip, control circuit, contactor circuit and capacitor bank circuit, the input of delays time to control chip is connected with the outfan of voltage stabilizing chip, the outfan of delays time to control chip is connected with the input of control circuit, the end that controls of control circuit is connected with the control end of contactor circuit, the input of contactor circuit is connected with input power, the outfan of contactor circuit is connected with the input of high-power inverter or high power load by capacitance group circuit. the present invention is so arranged, by arranging the difference of the turn-on and turn-off device of contactor circuit in time delay situation, ensure that instantaneous voltage and transient current will not produce sudden change, it is possible to electric current when controlling switch Guan Bi is in stable situation, it is therefore prevented that the generation of electric arc.
As preferably, described contactor circuit includes catalyst K1 coil, catalyst K1 normally opened contact and resistance R1, resistance R1 is in parallel with catalyst K1 normally opened contact, the movable contact of catalyst K1 normally opened contact electrically connects with input power by controlling switch, the stationary contact of catalyst K1 normally opened contact is connected with the input of capacitor bank circuit, the input of catalyst K1 coil electrically connects with input power, and the outfan of catalyst K1 coil is connected with the outfan of control circuit. So arrange, it is ensured that resistance R1 can consume the electric current of part, it is therefore prevented that the situation of input power direct short-circuit produces.
As preferably, described control circuit includes audion Q1, resistance R2 and diode D21, the base stage of audion Q1 is connected with the outfan of delays time to control chip by resistance R2, the emitter grounding of audion Q1, the colelctor electrode of audion Q1 is connected with the outfan of catalyst K1 coil, the negative electrode of diode D21 is connected with the colelctor electrode of audion Q1, and the anode of diode D21 is connected with the emitter stage of audion Q1.So arrange, ensure that the output of only delays time to control chip can turn off very much in the conducting of control contactor circuit, only when the output of delays time to control chip controls electric current, the collector and emitter of audion Q1 just turns on, namely the coil of catalyst K1 just turns on, the normally opened contact Guan Bi of catalyst K1, completes big electric current power-up routine.
As preferably, the inverter of described big electric current also includes anti-reverse diode D1 and anti-reverse diode D2, the anode of described anti-reverse diode D1 and the connection of input power, the negative electrode of anti-reverse diode D1 is connected with the input of catalyst K1 coil, the anode of anti-reverse diode D2 is by controlling the connection of switch and input power, and the negative electrode of anti-reverse diode D2 is connected with the input of voltage stabilizing chip. The setting of anti-reverse diode D1 and anti-reverse diode D2 ensure that when input power connects once reversal connection, any electric current will not be had to input, it is therefore prevented that the reversal connection damage to load.
As preferably, described capacitor bank circuit includes the electric capacity of several parallel connections, the equal ground connection of negative electrode of all electric capacity, the anode of all electric capacity is all connected with the stationary contact of catalyst K1 normally opened contact, and the anode of all electric capacity is also all connected with the input of high-power inverter or high power load.
The substantial effect of the present invention is: present configuration is simple, easy to manufacture, with low cost, it is possible to protects for high-power inverter or high power load arc protection, prevents major loop from striking sparks in time, eliminates the therefore potential safety hazard caused.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present invention.
Detailed description of the invention
Below by specific embodiment, and in conjunction with accompanying drawing, technical scheme is described in further detail.
Embodiment:
A kind of high-current protector (referring to accompanying drawing 1), arc protection for high-power inverter or high power load is protected, including controlling switch and voltage stabilizing chip, the input of voltage stabilizing chip is connected with input power by controlling switch, also include delays time to control chip, control circuit, contactor circuit and capacitor bank circuit, the input of delays time to control chip is connected with the outfan of voltage stabilizing chip, the outfan of delays time to control chip is connected with the input of control circuit, the end that controls of control circuit is connected with the control end of contactor circuit, the input of contactor circuit is connected with input power, the outfan of contactor circuit is connected with the input of high-power inverter or high power load by capacitance group circuit. contactor circuit includes catalyst K1 coil, catalyst K1 normally opened contact and resistance R1, resistance R1 is in parallel with catalyst K1 normally opened contact, the movable contact of catalyst K1 normally opened contact electrically connects with input power by controlling switch, the stationary contact of catalyst K1 normally opened contact is connected with the input of capacitor bank circuit, the input of catalyst K1 coil electrically connects with input power, and the outfan of catalyst K1 coil is connected with the outfan of control circuit. control circuit includes audion Q1, resistance R2 and diode D21, the base stage of audion Q1 is connected with the outfan of delays time to control chip by resistance R2, the emitter grounding of audion Q1, the colelctor electrode of audion Q1 is connected with the outfan of catalyst K1 coil, the negative electrode of diode D21 is connected with the colelctor electrode of audion Q1, and the anode of diode D21 is connected with the emitter stage of audion Q1. the inverter of big electric current also includes anti-reverse diode D1 and anti-reverse diode D2, the anode of anti-reverse diode D1 and the connection of input power, the negative electrode of anti-reverse diode D1 is connected with the input of catalyst K1 coil, the anode of anti-reverse diode D2 is by controlling the connection of switch and input power, and the negative electrode of anti-reverse diode D2 is connected with the input of voltage stabilizing chip.Capacitor bank circuit includes the electric capacity of several parallel connections, and the equal ground connection of negative electrode of all electric capacity, the anode of all electric capacity is all connected with the stationary contact of catalyst K1 normally opened contact, and the anode of all electric capacity is also all connected with the input of high-power inverter or high power load.
During the present embodiment use, if input power reversal connection access, when controlling switch Guan Bi, putting back in the present invention connects diode and works, and voltage stabilizing chip and catalyst K1 coil all must not be electric, and load or high-power inverter must not be electric, and input power reversal connection is invalid. when input power normally accesses, control switch Guan Bi, capacitance group circuit is charged by input power electric current by resistance R1, resistance R1 consumes part electric energy, prevent big capacity electrolyte capacitor momentary charge can cause sparking for binding post, simultaneously, input power electric current through voltage stabilizing chip to delays time to control chip power supply, delays time to control chip time delay outputs control signals to the base stage of audion Q1, turn between the emitter and collector of audion Q1, catalyst K1 coil obtains electric, catalyst K1 normally opened contact closes, input power is powered to load or high-power inverter.
Embodiment described above is the one preferably scheme of the present invention, not the present invention is done any pro forma restriction, also has other variant and remodeling under the premise without departing from the technical scheme described in claim.
Claims (1)
1. a high-current protector, arc protection for high-power inverter or high power load is protected, including controlling switch and voltage stabilizing chip, the input of voltage stabilizing chip is connected with input power by controlling switch, it is characterized in that: high-current protector also includes delays time to control chip, control circuit, contactor circuit and capacitor bank circuit, the input of delays time to control chip is connected with the outfan of voltage stabilizing chip, the outfan of delays time to control chip is connected with the input of control circuit, the end that controls of control circuit is connected with the control end of contactor circuit, the input of contactor circuit is connected with input power, the outfan of contactor circuit is connected with the input of high-power inverter or high power load by capacitor bank circuit, described contactor circuit includes catalyst K1 coil, catalyst K1 normally opened contact and resistance R1, resistance R1 is in parallel with catalyst K1 normally opened contact, the movable contact of catalyst K1 normally opened contact electrically connects with input power by controlling switch, the stationary contact of catalyst K1 normally opened contact is connected with the input of capacitor bank circuit, the input of catalyst K1 coil electrically connects with input power, the outfan of catalyst K1 coil is connected with the outfan of control circuit, described control circuit includes audion Q1, resistance R2 and diode D21, the base stage of audion Q1 is connected with the outfan of delays time to control chip by resistance R2, the emitter grounding of audion Q1, the colelctor electrode of audion Q1 is connected with the outfan of catalyst K1 coil, the negative electrode of diode D21 is connected with the colelctor electrode of audion Q1, the anode of diode D21 is connected with the emitter stage of audion Q1, the inverter of described big electric current also includes anti-reverse diode D1 and anti-reverse diode D2, the anode of described anti-reverse diode D1 is connected with input power, the negative electrode of anti-reverse diode D1 is connected with the input of catalyst K1 coil, the anode of anti-reverse diode D2 is by controlling the connection of switch and input power, the negative electrode of anti-reverse diode D2 is connected with the input of voltage stabilizing chip, described capacitor bank circuit includes the electric capacity of several parallel connections, the equal ground connection of negative electrode of all electric capacity, the anode of all electric capacity is all connected with the stationary contact of catalyst K1 normally opened contact, the anode of all electric capacity is also all connected with the input of high-power inverter or high power load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210404351.XA CN103178576B (en) | 2012-10-23 | 2012-10-23 | High-current protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210404351.XA CN103178576B (en) | 2012-10-23 | 2012-10-23 | High-current protector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103178576A CN103178576A (en) | 2013-06-26 |
| CN103178576B true CN103178576B (en) | 2016-06-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210404351.XA Active CN103178576B (en) | 2012-10-23 | 2012-10-23 | High-current protector |
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| CN (1) | CN103178576B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104063924A (en) * | 2014-02-12 | 2014-09-24 | 苏州天鸣信息科技有限公司 | Light-sensing electronic lock device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5410441A (en) * | 1993-02-01 | 1995-04-25 | Motorola, Inc. | Circuit for protecting DC powered devices from improper supply voltages |
| CN102055184A (en) * | 2010-12-31 | 2011-05-11 | 广东美的电器股份有限公司 | Direct current power supply reversed connection preventing circuit with polarity distinguishing and control method thereof |
-
2012
- 2012-10-23 CN CN201210404351.XA patent/CN103178576B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5410441A (en) * | 1993-02-01 | 1995-04-25 | Motorola, Inc. | Circuit for protecting DC powered devices from improper supply voltages |
| CN102055184A (en) * | 2010-12-31 | 2011-05-11 | 广东美的电器股份有限公司 | Direct current power supply reversed connection preventing circuit with polarity distinguishing and control method thereof |
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| Publication number | Publication date |
|---|---|
| CN103178576A (en) | 2013-06-26 |
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