CN103683402A - Coal mine equipment power source with protection circuit - Google Patents
Coal mine equipment power source with protection circuit Download PDFInfo
- Publication number
- CN103683402A CN103683402A CN201310636861.4A CN201310636861A CN103683402A CN 103683402 A CN103683402 A CN 103683402A CN 201310636861 A CN201310636861 A CN 201310636861A CN 103683402 A CN103683402 A CN 103683402A
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- coal mine
- diode
- protective circuit
- thermistor
- storage battery
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- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a coal mine equipment power source with a protection circuit. The coal mine equipment power source comprises a charging adapter, the shock-proof protection circuit and a 24V direct-current storage battery, the charging adapter is serially connected with the shock-proof protection circuit which is serially connected with the 24V direct-current storage battery, and the 24V direct-current storage battery is serially connected with coal mine equipment. Being provided with the shock-proof protection circuit, the power source can effectively prevent components in the circuit from being damaged due to over-high temperature of the circuit; stability of electronic operation of a coal mine can be improved, and powerful technical support is provided for safe and efficient production of the whole coal mine.
Description
Technical field
The invention belongs to technical field of electricity, relate to a kind of power supply, be specifically related to a kind of coal mine equipment power supply with protective circuit.
Background technology
The stable operation of pit gear is very great to safety of coal mines, High-efficient Production meaning.Underground equipment has mostly been used complex protection device, effectively the safety and reliability of raising equipment operation; When equipment breaks down, also facilitated maintenance.Once the electric power system of down-hole has a power failure, comprehensive protector has also just lost power supply, has stopped operation, brings great hidden danger to the safety in production in colliery.
In prior art, the overcurrent of control chip, overheat protector function unsound.First, within the scope of the current protection that it can only can be controlled at it, realize overcurrent protection.When electric current surpasses its protection range, only limit power protection, can make the lower voltage of protected circuit part, can not make the electric current in protected circuit reduce, in this case, can cause the damage of components and parts in circuit.In addition; the overheat protector of control chip is uncontrollable; only in the temperature of control chip during higher than its specified protection temperature value; just can automatically shut down, realize overheat protector function, in circuit, temperature is very high; but while not reaching the specified protection temperature value of control chip; control chip can not automatically shut down, and in this case, also can cause the damage of components and parts in circuit.
Summary of the invention
Technical problem to be solved by this invention is: provide a kind of ore deposit that can maintain under power-off condition to enter the coal mine equipment power supply with protective circuit that equipment is normally worked, met electronization, automation and e-manufacturing demand.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of coal mine equipment power supply with protective circuit, comprise charging adapter, protecting against shock protective circuit, 24V direct-flow storage battery, described charging adapter and protecting against shock protective circuit are in series, described protecting against shock protective circuit and 24V direct-flow storage battery are in series, described 24V direct-flow storage battery and coal mine equipment are in series, and it is characterized in that: described protecting against shock protective circuit comprises current detecting unit and overprotection unit; Described overprotection unit comprises the first diode, the second diode, the first thermistor, the second resistance, voltage-stabiliser tube and triode; The anode of described the first diode is connected with described current detecting unit, and negative electrode is connected with the negative electrode of described the second diode; The anode of described the second diode is connected with the first end of described the first thermistor; The second end of described the first thermistor is connected to voltage output end, and the first end of described the second resistance is connected with the first end of described the first thermistor, the second end ground connection; The positive pole of described voltage-stabiliser tube is connected with the negative electrode of described the first diode, and negative pole is connected with the base stage of described triode; The grounded emitter of described triode, collector electrode is for being connected with the Enable Pin pin of control chip.
Compared with prior art, the beneficial effect that the present invention has is:
The present invention is provided with protecting against shock protective circuit; can effectively prevent from damaging because circuit temperature is too high the situation of components and parts in circuit; in the situation that having a power failure; the present invention can continue to maintain electronic equipment and normally work; greatly improved the stability of colliery electronics operation, strong technical support is provided to safety, the High-efficient Production in whole colliery.
Accompanying drawing explanation
Fig. 1 is principle schematic of the present invention;
Fig. 2 is the principle schematic of protecting against shock protective circuit of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
As depicted in figs. 1 and 2, a kind of coal mine equipment power supply with protective circuit, comprise charging adapter, protecting against shock protective circuit, 24V direct-flow storage battery, described charging adapter and protecting against shock protective circuit are in series, described protecting against shock protective circuit and 24V direct-flow storage battery are in series, described 24V direct-flow storage battery and coal mine equipment are in series, and it is characterized in that: described protecting against shock protective circuit comprises current detecting unit and overprotection unit; Described overprotection unit comprises the first diode, the second diode, the first thermistor, the second resistance, voltage-stabiliser tube and triode; The anode of described the first diode is connected with described current detecting unit, and negative electrode is connected with the negative electrode of described the second diode; The anode of described the second diode is connected with the first end of described the first thermistor; The second end of described the first thermistor is connected to voltage output end, and the first end of described the second resistance is connected with the first end of described the first thermistor, the second end ground connection; The positive pole of described voltage-stabiliser tube is connected with the negative electrode of described the first diode, and negative pole is connected with the base stage of described triode; The grounded emitter of described triode, collector electrode is for being connected with the Enable Pin pin of control chip.
In actual applications, the size of described magnitude of voltage V0 is concrete restriction not, the size of the Temperature Setting magnitude of voltage V0 that can bear according to the protected circuit of reality; Wherein, if the second end of described the first thermistor R1 is directly connected to the voltage source in protected circuit; the temperature value that the magnitude of voltage that can provide according to described voltage source and protected circuit can bear is selected the first suitable thermistor R1 and the second resistance R 2; while making temperature value that the temperature in protected circuit can bear higher than it, described protective circuit can realize overheat protector function.
In order to guarantee when the temperature of described protective circuit changes; the change in resistance amount of described the first thermistor R1 can change the voltage swing at described the second resistance R 2 two ends significantly; described protective circuit can also comprise the 3rd resistance; described the 3rd resistance first end is connected with the second end of described the first thermistor R1; concrete, the second end of described the 3rd resistance is connected to voltage output end.
When described protective circuit work, the resistance of the first thermistor also can constantly reduce along with the rising of temperature, thereby the voltage at the second resistance two ends is constantly improved, voltage after the second diode also can make the corresponding reverse-conduction current of voltage-stabiliser tube increasing, when voltage reaches certain value, the electric current of flowing through can impel triode conducting, increase along with transistor base and the pressure drop of collector electrode two ends, the voltage of collector terminal also decreases, and then drag down the voltage of the Enable Pin pin of control chip, control chip is turn-offed, realize overheat protector function.
Those of ordinary skill in the art will be appreciated that, above embodiment is only for the present invention is described, and be not used as limitation of the invention, as long as within the scope of connotation of the present invention, to the variation of the above embodiment, modification, all will drop within the scope of claim of the present invention.
Claims (1)
1. a coal mine equipment power supply with protective circuit, comprise charging adapter, protecting against shock protective circuit, 24V direct-flow storage battery, described charging adapter and protecting against shock protective circuit are in series, described protecting against shock protective circuit and 24V direct-flow storage battery are in series, described 24V direct-flow storage battery and coal mine equipment are in series, and it is characterized in that: described protecting against shock protective circuit comprises current detecting unit and overprotection unit; Described overprotection unit comprises the first diode, the second diode, the first thermistor, the second resistance, voltage-stabiliser tube and triode; The anode of described the first diode is connected with described current detecting unit, and negative electrode is connected with the negative electrode of described the second diode; The anode of described the second diode is connected with the first end of described the first thermistor; The second end of described the first thermistor is connected to voltage output end, and the first end of described the second resistance is connected with the first end of described the first thermistor, the second end ground connection; The positive pole of described voltage-stabiliser tube is connected with the negative electrode of described the first diode, and negative pole is connected with the base stage of described triode; The grounded emitter of described triode, collector electrode is for being connected with the Enable Pin pin of control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310636861.4A CN103683402A (en) | 2013-12-02 | 2013-12-02 | Coal mine equipment power source with protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310636861.4A CN103683402A (en) | 2013-12-02 | 2013-12-02 | Coal mine equipment power source with protection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103683402A true CN103683402A (en) | 2014-03-26 |
Family
ID=50320056
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310636861.4A Pending CN103683402A (en) | 2013-12-02 | 2013-12-02 | Coal mine equipment power source with protection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103683402A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193883A (en) * | 2018-11-28 | 2019-01-11 | 华勤通讯技术有限公司 | The charging base and its control circuit of smartwatch |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1492211A1 (en) * | 2003-06-24 | 2004-12-29 | NEC Corporation | Method and circuit for protecting a battery operated electronic device |
| CN202872324U (en) * | 2012-11-09 | 2013-04-10 | 北京经纬恒润科技有限公司 | Protection circuit and switching power supply with same |
-
2013
- 2013-12-02 CN CN201310636861.4A patent/CN103683402A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1492211A1 (en) * | 2003-06-24 | 2004-12-29 | NEC Corporation | Method and circuit for protecting a battery operated electronic device |
| CN202872324U (en) * | 2012-11-09 | 2013-04-10 | 北京经纬恒润科技有限公司 | Protection circuit and switching power supply with same |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109193883A (en) * | 2018-11-28 | 2019-01-11 | 华勤通讯技术有限公司 | The charging base and its control circuit of smartwatch |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140326 |