CN103178576A - High-current protector - Google Patents
High-current protector Download PDFInfo
- Publication number
- CN103178576A CN103178576A CN201210404351XA CN201210404351A CN103178576A CN 103178576 A CN103178576 A CN 103178576A CN 201210404351X A CN201210404351X A CN 201210404351XA CN 201210404351 A CN201210404351 A CN 201210404351A CN 103178576 A CN103178576 A CN 103178576A
- Authority
- CN
- China
- Prior art keywords
- contactor
- input
- circuit
- power
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Inverter Devices (AREA)
Abstract
The invention relates to a high-current protector and aims to solve the problems that instantaneous charge of a high-capacity electrolytic capacitor tends to cause a fire to a terminal, potential safety hazards can be caused, and the uneven lower surface of a lower terminal affects using of a product. According to the technical scheme, the high-current protector is characterized by comprising a control switch and a voltage-stabilizing chip. An input end of the voltage-stabilizing chip is connected with an input power source through the control switch. The high-current protector further comprises a delay control chip, a control circuit, a contactor circuit and a capacitor bank circuit. An input end of the delay control chip is connected with an output end of the voltage-stabilizing chip. An output end of the delay control chip is connected with an input end of the control circuit. A control end of the control circuit is connected with a control end of the contactor circuit. An input end of the contactor circuit is connected with the input power source. An output end of the contactor circuit is connected with an input end of a high-power inverter or high-power load through the capacitor bank circuit. The high-current protector is available for arc protection for high-power inverters or high-power loads.
Description
Technical field
The present invention is a kind of circuit protection device, particularly relates to a kind of large current protective device for high-power inverter or the protection of high power load arc protection.
Background technology
Both at home and abroad inverter input terminal all adopts the pattern that connects with the electric wire of different cross-sectional and binding post according to size of current, the advantage of this pattern is that cost is economized, expense is low, but shortcoming is also fairly obvious, is exactly when high-power, because electric current increases, although adopt sectional area of wire to increase, but there are two critical defects to solve, the one, if user's wrong polarity in use can cause inverter and burn.The 2nd, because inverter self big capacity electrolyte capacitor momentary charge can cause sparking for binding post, not only have safety seal hidden danger, can dock the lower terminal surface irregularity simultaneously.Affecting product uses.Develop and aly can prevent reversal connection, can prevent again the inverter input equipment of striking sparks, to the result of use that improves inverter and the lsafety level when promoting the user and using, have extremely important meaning.Same, for powerful load, equally exist and need to prevent the sparking situation of moment, so now a kind of research and development of the large current protective device for high-power inverter or the protection of high power load arc protection are imperative.
China Patent Publication No.: CN202172297U discloses a kind of reverse connection preventing firing circuit open day on March 21st, 2012, comprising: the first resistance, the second resistance, the 3rd resistance, the first switching tube, second switch pipe and the 3rd electric capacity; Described the first resistance is connected between the drain electrode of the drain electrode of described the first switching tube and described second switch pipe; The drain electrode of described the 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 storage battery; The grid of described second switch pipe is connected with the positive output end of described power supply or negative output terminal; Described the first switching tube source electrode is connected with the source electrode of described second switch pipe; Described the second resistance is connected between the grid of the grid of described the first switching tube and described second switch pipe; Described the 3rd resistance is connected between the grid of the source electrode of described second switch pipe and described second switch pipe; Described the 3rd electric capacity is connected between the grid of the source electrode of described the first switching tube and described the 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 large electric current is helpless, when particularly being applied in high-power inverter, in the face of instantaneous large electric current; the Low-voltage Electronic device; fully helpless, can not play the effect of anti-sparking, also various faults can appear.
Summary of the invention
The objective of the invention is to exist the big capacity electrolyte capacitor momentary charge can cause sparking for binding post for solving present technical scheme; not only have safety seal hidden danger; can dock the lower terminal surface irregularity simultaneously; affect product and use problem, a kind of large current protective device for high-power inverter or the protection of high power load arc protection is provided.
the technical solution adopted for the present invention to solve the technical problems is: a kind of large current protective device, be used for the arc protection protection of high-power inverter or high power load, comprise control switch and voltage stabilizing chip, the input of voltage stabilizing chip is connected with input power by control switch, large current protective device also comprises the time-delay control chip, control circuit, contactor circuit and capacitor group circuit, the input of time-delay control chip is connected with the output of voltage stabilizing chip, the output of time-delay control chip is connected with the input of control circuit, the control end of control circuit is connected with the control end of contactor circuit, the input of contactor circuit is connected with input power, the output of contactor circuit is connected with the input of high-power inverter or high power load by the capacitance group circuit.The present invention arranges like this, the difference of the turn-on and turn-off device by contactor circuit in the time-delay situation is set, guaranteed that instantaneous voltage and transient current can not produce sudden change, the electric current in the time of can control switch is closed is in stable situation, has prevented the generation of electric arc.
As preferably, described contactor circuit comprises contactor K1 coil, contactor K1 normally opened contact and resistance R 1, resistance R 1 is in parallel with contactor K1 normally opened contact, the moving contact of contactor K1 normally opened contact is electrically connected to input power by control switch, the fixed contact of contactor K1 normally opened contact is connected with the input of capacitor group circuit, the input of contactor K1 coil is electrically connected to input power, and the output of contactor K1 coil is connected with the output of control circuit.Arrange like this, guaranteed that resistance R 1 can consume the electric current of part, prevented that the situation of input power direct short-circuit from producing.
As preferably, described control circuit comprises triode Q1, resistance R 2 and diode D3, the base stage of triode Q1 is connected by the output of resistance R 2 with the time-delay control chip, the emitter grounding of triode Q1, the collector electrode of triode Q1 is connected with the second conduction terminal of contactor K1 coil, the negative electrode of diode D3 is connected with the collector electrode of triode Q1, and the anode of triode Q1 is connected with the emitter of triode Q1.Arrange like this, guaranteed to only have the conducting that the output of time-delay control chip can the control contactor circuit to turn-off very much, only have when electric current is controlled in the output of time-delay control chip, the just conducting of the collector and emitter of triode Q1, namely just conducting of the coil of contactor K1, the normally opened contact of contactor K1 is closed, completes the large electric current program that powers on.
As preferably, the inverter of described large electric current also comprises 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 contactor K1 coil, the anode of anti-reverse diode D2 is connected by control switch and input power, and the negative electrode of anti-reverse diode D2 is connected with the input of voltage stabilizing chip.In case anti-reverse diode D1 be connected the reversal connection when having guaranteed that input power connects of arranging of diode D2, will not have any electric current input, prevented the damage of reversal connection to load.
As preferably, described capacitor group circuit comprises the electric capacity that several are in parallel, the equal ground connection of the negative electrode of all electric capacity, the anode of all electric capacity all are connected with the fixed contact of contactor K1 normally opened contact, and the anode of all electric capacity also all is connected with the input of high-power inverter or high power load.
Substantial effect of the present invention is: the present invention is simple in structure, easy to manufacture, with low cost, can be used in the protection of high-power inverter or high power load arc protection, in time prevents the major loop sparking, eliminates the potential safety hazard that therefore causes.
Description of drawings
Fig. 1 is circuit theory diagrams of the present invention.
Embodiment
Below by specific embodiment, and by reference to the accompanying drawings, technical scheme of the present invention is described in further detail.
Embodiment:
a kind of large current protective device (referring to accompanying drawing 1), be used for the arc protection protection of high-power inverter or high power load, comprise control switch and voltage stabilizing chip, the input of voltage stabilizing chip is connected with input power by control switch, also comprise the time-delay control chip, control circuit, contactor circuit and capacitor group circuit, the input of time-delay control chip is connected with the output of voltage stabilizing chip, the output of time-delay control chip is connected with the input of control circuit, the control end of control circuit is connected with the control end of contactor circuit, the input of contactor circuit is connected with input power, the output of contactor circuit is connected with the input of high-power inverter or high power load by the capacitance group circuit.Contactor circuit comprises contactor K1 coil, contactor K1 normally opened contact and resistance R 1, resistance R 1 is in parallel with contactor K1 normally opened contact, the moving contact of contactor K1 normally opened contact is electrically connected to input power by control switch, the fixed contact of contactor K1 normally opened contact is connected with the input of capacitor group circuit, the input of contactor K1 coil is electrically connected to input power, and the output of contactor K1 coil is connected with the output of control circuit.Control circuit comprises triode Q1, resistance R 2 and diode D3, the base stage of triode Q1 is connected by the output of resistance R 2 with the time-delay control chip, the emitter grounding of triode Q1, the collector electrode of triode Q1 is connected with the second conduction terminal of contactor K1 coil, the negative electrode of diode D3 is connected with the collector electrode of triode Q1, and the anode of triode Q1 is connected with the emitter of triode Q1.The inverter of large electric current also comprises anti-reverse diode D1 and anti-reverse diode D2, the anode of anti-reverse diode D1 is connected with input power, the negative electrode of anti-reverse diode D1 is connected with the input of contactor K1 coil, the anode of anti-reverse diode D2 is connected by control switch and input power, and the negative electrode of anti-reverse diode D2 is connected with the input of voltage stabilizing chip.Capacitor group circuit comprises the electric capacity that several are in parallel, the equal ground connection of the negative electrode of all electric capacity, and the anode of all electric capacity all is connected with the fixed contact of contactor K1 normally opened contact, and the anode of all electric capacity also all is connected with the input of high-power inverter or high power load.
When the present embodiment used, if input power reversal connection access, when control switch was closed, putting back in the present invention connect diode and works, and voltage stabilizing chip and contactor K1 coil all must not be electric, and load or high-power inverter must not be electric, and the input power reversal connection is invalid.when input power normally accesses, control switch is closed, the input power electric current charges by 1 pair of capacitance group circuit of resistance R, resistance R 1 consumes the part electric energy, prevented that the big capacity electrolyte capacitor momentary charge from can cause sparking for binding post, simultaneously, the input power electric current is given the power supply of time-delay control chip through the voltage stabilizing chip, the time-delay of time-delay control chip outputs control signals to the base stage of triode Q1, conducting between the emitter and collector of triode Q1, contactor K1 coil gets electric, contactor K1 normally opened contact is closed, input power is to load or high-power inverter power supply.
Above-described embodiment is a kind of better scheme of the present invention, is not that the present invention is done any pro forma restriction, also has other variant and remodeling under the prerequisite that does not exceed the technical scheme that claim puts down in writing.
Claims (5)
1. large current protective device, be used for the arc protection protection of high-power inverter or high power load, comprise control switch and voltage stabilizing chip, the input of voltage stabilizing chip is connected with input power by control switch, it is characterized in that: large current protective device also comprises the time-delay control chip, control circuit, contactor circuit and capacitor group circuit, the input of time-delay control chip is connected with the output of voltage stabilizing chip, the output of time-delay control chip is connected with the input of control circuit, the control end of control circuit is connected with the control end of contactor circuit, the input of contactor circuit is connected with input power, the output of contactor circuit is connected with the input of high-power inverter or high power load by the capacitance group circuit.
2. the inverter of large electric current according to claim 1, it is characterized in that: described contactor circuit comprises contactor K1 coil, contactor K1 normally opened contact and resistance R 1, resistance R 1 is in parallel with contactor K1 normally opened contact, the moving contact of contactor K1 normally opened contact is electrically connected to input power by control switch, the fixed contact of contactor K1 normally opened contact is connected with the input of capacitor group circuit, the input of contactor K1 coil is electrically connected to input power, and the output of contactor K1 coil is connected with the output of control circuit.
3. the inverter of large electric current according to claim 2, it is characterized in that: described control circuit comprises triode Q1, resistance R 2 and diode D3, the base stage of triode Q1 is connected by the output of resistance R 2 with the time-delay control chip, the emitter grounding of triode Q1, the collector electrode of triode Q1 is connected with the second conduction terminal of contactor K1 coil, the negative electrode of diode D3 is connected with the collector electrode of triode Q1, and the anode of triode Q1 is connected with the emitter of triode Q1.
4. the inverter of according to claim 2 or 3 described large electric currents, it is characterized in that: the inverter of described large electric current also comprises 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 contactor K1 coil, the anode of anti-reverse diode D2 is connected by control switch and input power, and the negative electrode of anti-reverse diode D2 is connected with the input of voltage stabilizing chip.
5. the inverter of according to claim 2 or 3 described large electric currents, it is characterized in that: described capacitor group circuit comprises the electric capacity that several are in parallel, the equal ground connection of the negative electrode of all electric capacity, the anode of all electric capacity all is connected with the fixed contact of contactor K1 normally opened contact, and the anode of all electric capacity also all is 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 true CN103178576A (en) | 2013-06-26 |
| CN103178576B CN103178576B (en) | 2016-06-15 |
Family
ID=48638259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210404351.XA Active CN103178576B (en) | 2012-10-23 | 2012-10-23 | High-current protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103178576B (en) |
Cited By (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 |
Cited By (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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103178576B (en) | 2016-06-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203574534U (en) | Surge current suppressing circuit | |
| CN102931647A (en) | Surge current suppression circuit and lamp | |
| CN208369280U (en) | A kind of lithium battery protection circuit | |
| CN104348251A (en) | Circuit for switching power supplies of external power source and lithium battery | |
| CN103178576A (en) | High-current protector | |
| CN202930923U (en) | Protection circuit for battery polarity reversing | |
| CN203339947U (en) | Switch circuit and communication power supply | |
| CN201877776U (en) | Overflow overload short-circuit protection circuit | |
| CN203708096U (en) | Power supply protection circuit and power supply | |
| CN204304414U (en) | A kind of safe lithium ion battery | |
| CN204349564U (en) | Solar recharging all-in-one | |
| CN203250666U (en) | Arc-extinguishing apparatus of direct-current mechanical switch | |
| CN203491776U (en) | Alternating current/direct current uninterrupted inversion circuit of integrated power supply UPS | |
| CN104124723A (en) | Circuit for preventing cell from overcharging/overdischarging | |
| CN207382048U (en) | A kind of relay protection circuit for fire-fighting equipment power supply | |
| CN207382049U (en) | A kind of fire-fighting equipment power supply with relay protection circuit | |
| CN203352268U (en) | Bus capacitor charging/discharging circuit | |
| CN202363922U (en) | Pulse absorbing circuit | |
| CN202503262U (en) | Electric leakage protection device | |
| CN206250742U (en) | A kind of output short circuit protection circuit | |
| CN206180685U (en) | Turning -off power supply auto -change over device between preventing | |
| CN203839998U (en) | Battery charging reverse-connection protecting circuit | |
| CN202535168U (en) | Bus capacitor charging circuit of photovoltaic inverter | |
| CN202978241U (en) | Voltage drop suppressor and multi-subcircuit direct current power supply system | |
| CN202172181U (en) | Lightning protection energy saving socket |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |