CN207638327U - A kind of power protecting circuit of auto pump - Google Patents
A kind of power protecting circuit of auto pump Download PDFInfo
- Publication number
- CN207638327U CN207638327U CN201721800594.XU CN201721800594U CN207638327U CN 207638327 U CN207638327 U CN 207638327U CN 201721800594 U CN201721800594 U CN 201721800594U CN 207638327 U CN207638327 U CN 207638327U
- Authority
- CN
- China
- Prior art keywords
- electrically connected
- public connecting
- connecting end
- semiconductor
- oxide
- 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.)
- Active
Links
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a kind of power protecting circuits of auto pump, feature is that the first end of resistance and the first end of fuse connect to form the first common end, the second end of resistance is connect with the anode of the ends g of metal-oxide-semiconductor and switching diode respectively, the cathode of switching diode and the cathode of zener diode connect, the second end of fuse connect to form the second common end with the first end of two-way TVS pipe, the anode of zener diode and the ends d of metal-oxide-semiconductor, which connect, to be formed the second end of third common end and two-way TVS pipe and is electrically connected to form the 4th common end, the first end of second common end and varistor connects the anode connection to form the 5th common end and input power, 4th common end is connected with the second end of varistor to be formed the 6th common end and is connected with external ground terminal.Advantage is simple in structure, integrates five kinds of defencive functions, highly practical.
Description
Technical field
The utility model is related to a kind of auto pumps, more particularly, to a kind of power protecting circuit of auto pump.
Background technology
Existing auto pump is easily damaged due to various reasons, for example both ends of power is reversed, and supply voltage is excessively high, automobile
Water pump electric current is excessive, air or human contact's electric discharge and lightning stroke etc., therefore in circuit design for the electricity of auto pump
Source protection is particularly important, and the protection circuit function of the existing power supply for auto pump is relatively simple at present, generally can only
One such or several protections are provided, auto pump is caused to be easily damaged.
Invention content
The technical problem to be solved by the utility model is to provide it is a kind of it is simple in structure, integrate multi-protective function
The power protecting circuit of auto pump.
Technical solution is used by the utility model solves above-mentioned technical problem：
A kind of power protecting circuit of auto pump, including input power, fuse, resistance, switching diode, voltage stabilizing two
Pole pipe, metal-oxide-semiconductor, two-way TVS pipe and varistor, the first end of the resistance and the first end of the fuse electrically connect
Connect and formed the first public connecting end, the second end of the resistance respectively with the ends g of the metal-oxide-semiconductor and the switch two
The anode of pole pipe is electrically connected, and the cathode of the switching diode and the cathode of the zener diode are electrically connected, institute
The second end for the fuse stated and the first end of the two-way TVS pipe are electrically connected and are formed the second public connecting end, described
The anode of zener diode and the ends d of the metal-oxide-semiconductor is electrically connected and is formed third public connecting end, third public affairs
Connecting pin and the second end of the two-way TVS pipe are electrically connected and are formed the 4th public connecting end altogether, and described second is public
Connecting pin and the first end of the varistor are electrically connected and are formed the 5th public connecting end, and the described the 5th is commonly connected
End and the anode of the input power are electrically connected, the second end of the 4th public connecting end and the varistor
It is electrically connected and is formed the 6th public connecting end, the 6th public connecting end is connected with external ground terminal.
The input terminal of first public connecting end and auto pump is electrically connected, the ends s of the metal-oxide-semiconductor and automobile
The ground terminal of water pump is electrically connected.It is realized by the ends s of the first public connecting end and metal-oxide-semiconductor and the power protecting circuit is linked into vapour
In vehicle water pump, protected to be formed to auto pump.
Compared with prior art, the utility model has the advantage of：
Pass through the mutual cooperation between above-mentioned specific electronic component so that the power protecting circuit of the auto pump can provide
Overvoltage protection, overcurrent protection, reverse connecting protection, ESD protections and surge protection integrate five kinds of defencive functions, structure letter
Single, at low cost and highly practical, the concrete function performance of each electronic component is as follows：
（1）Varistor is used for overvoltage protection and surge protection, when the voltage at power input both ends is less than pressure-sensitive electricity
When the protection value of resistance, the impedance of varistor is very big, open circuit is equivalent to, on late-class circuit without influence；When power input both ends
Voltage be more than varistor protection value or circuit by surge impact, the resistance value moment of varistor becomes smaller, part electricity
Stream is shunted by varistor, and the both end voltage into late-class circuit is clamped within protection value, plays protection late-class circuit
Effect；
（2）Two-way TVS pipe for ESD protect and surge protection, when the voltage at power input both ends do not have ESD impact and
When surge impact, the impedance of two-way TVS pipe is very big, open circuit is equivalent to, on late-class circuit without influence；When power input both ends by
When to ESD impact or surge impact, two-way TVS pipe can be operated under reversed avalanche breakdown mode moment, and impact energy is big absolutely
Part flow back into external ground terminal by two-way TVS pipe, plays the role of protecting late-class circuit；
（3）Fuse is used for overcurrent protection, and when auto pump works normally, electric current is less than the protection value of fuse,
Fuse is equivalent to a section lead, and on circuit without influence, when high current occurs in auto pump, current value is higher than the guarantor of fuse
The impedance of shield value, fuse can increase moment, plays the role of deenergization, protects auto pump circuit；
（4）Resistance, switching diode, zener diode and metal-oxide-semiconductor are used for reverse connecting protection, when power supply just connects, metal-oxide-semiconductor
G terminal voltage values are more than cut-in voltage, and metal-oxide-semiconductor is in the conduction state, and the negative terminal and power cathode of auto pump communicate, auto pump
Normal power supply；When reverse power connection, the g terminal voltage values of metal-oxide-semiconductor are less than cut-in voltage, and metal-oxide-semiconductor is not turned on, without electricity on auto pump
Pressure realizes reverse power connection protection;
（5）Resistance protects switching diode for limiting the electric current for flowing through switching diode；
（6）When switching diode is used for reverse power connection, when preventing electric current from flowing through zener diode and resistance, counnter attack connection function
Failure；
（7）Zener diode is used for when the abnormal signals such as the pulse that disturbs input, and limits the ends g and the ends d of metal-oxide-semiconductor
Between voltage, play the role of protect metal-oxide-semiconductor.
Description of the drawings
Fig. 1 is the overall structure diagram of the utility model.
Specific implementation mode
The utility model is described in further detail below in conjunction with attached drawing embodiment.
As shown, a kind of power protecting circuit of auto pump, including input power VCC, fuse F1, resistance R1,
Switching diode D1, zener diode D2, metal-oxide-semiconductor T1, two-way TVS pipe D3 and varistor Z1, the first end of resistance R1 and guarantor
The first end of dangerous silk F1 is electrically connected and is formed the first public connecting end 1, the second end of resistance R1 respectively with the ends g of metal-oxide-semiconductor T1
It being electrically connected with the anode of switching diode D1, the cathode of switching diode D1 is electrically connected with the cathode of zener diode D2,
The second end of fuse F2 and the first end of two-way TVS pipe D3 are electrically connected and form the second public connecting end 2, zener diode
The anode of D2 and the ends d of metal-oxide-semiconductor T1 are electrically connected and are formed third public connecting end 3, third public connecting end 3 and two-way TVS
The second end of pipe D3 is electrically connected and is formed the 4th public connecting end 4, the first end of the second public connecting end 2 and varistor Z1
It is electrically connected and is formed the 5th public connecting end 5, the anode of the 5th public connecting end 5 and input power VCC is electrically connected, and the 4th
The second end of public connecting end 4 and varistor Z1 is electrically connected and is formed the 6th public connecting end 6, the 6th public connecting end 6
It is connected with external ground terminal GND.
The input terminal 7 of first public connecting end 1 and auto pump LOAD is electrically connected, the ends s and the automobile water of metal-oxide-semiconductor T1
The ground terminal 8 of pump LOAD is connected, which is linked into auto pump LOAD by realization, and guarantor is played to auto pump
Shield acts on.
Claims (2)
1. a kind of power protecting circuit of auto pump, it is characterised in that including input power, fuse, resistance, two pole of switch
Pipe, zener diode, metal-oxide-semiconductor, two-way TVS pipe and varistor, the of the first end of the resistance and the fuse
One end is electrically connected and is formed the first public connecting end, the second end of the resistance respectively with the ends g of the metal-oxide-semiconductor and institute
The anode for the switching diode stated is electrically connected, the negative electricity of the cathode of the switching diode and the zener diode
Property connection, the first end of the second end of the fuse and the two-way TVS pipe is electrically connected and forms the second public company
End is connect, the anode of the zener diode and the ends d of the metal-oxide-semiconductor are electrically connected and are formed third public connecting end, institute
The third public connecting end stated and the second end of the two-way TVS pipe are electrically connected and are formed the 4th public connecting end, described
The second public connecting end and the first end of the varistor be electrically connected and formed the 5th public connecting end, described the
The anode of five public connecting ends and the input power is electrically connected, the 4th public connecting end and the pressure-sensitive electricity
The second end of resistance is electrically connected and is formed the 6th public connecting end, and the 6th public connecting end is connected with external ground terminal
It connects.
2. a kind of power protecting circuit of auto pump as described in claim 1, it is characterised in that the first public company
The input terminal for connecing end and auto pump is electrically connected, and the ends s of the metal-oxide-semiconductor and the ground terminal of auto pump are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721800594.XU CN207638327U (en) | 2017-12-21 | 2017-12-21 | A kind of power protecting circuit of auto pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721800594.XU CN207638327U (en) | 2017-12-21 | 2017-12-21 | A kind of power protecting circuit of auto pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207638327U true CN207638327U (en) | 2018-07-20 |
Family
ID=62853633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721800594.XU Active CN207638327U (en) | 2017-12-21 | 2017-12-21 | A kind of power protecting circuit of auto pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207638327U (en) |
-
2017
- 2017-12-21 CN CN201721800594.XU patent/CN207638327U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204089181U (en) | A kind of lightning surge protection circuit and LED drive power | |
| CN106159926A (en) | A kind of surge protection circuit and Surge Protector | |
| TW200924337A (en) | Protect circuit of car power | |
| CN201813153U (en) | Anti-surging device of high-performance serial port | |
| EP2345947A3 (en) | Surge protected power supply | |
| CN207251200U (en) | A kind of protection circuit of smart home power supply lightning surge | |
| CN104218561A (en) | Multistage lightning protection circuit with delay circuit | |
| CN205791502U (en) | A kind of lightning-protection module | |
| CN207638327U (en) | A kind of power protecting circuit of auto pump | |
| CN102882181B (en) | Reverse protection and overvoltage protection circuit based on bidirectional silicon-controlled thyristor | |
| CN102315629A (en) | Protection circuit and electronic device with same | |
| CN208046229U (en) | Surge protector for monitoring system | |
| CN201247952Y (en) | Waterproof single-phase B+C power supply lightning protection box | |
| CN202856306U (en) | Reverse connection protection and overvoltage protection circuit based on bidirectional silicon controlled rectifier | |
| CN209488171U (en) | A kind of 485 communication bus lightning protection circuits for mqtt gateway | |
| CN208638027U (en) | A kind of surging protection circuit | |
| CN106505545B (en) | A kind of surge protecting circuit and surge protector | |
| CN208315406U (en) | The auxiliary contact and surge protector of surge protector | |
| CN209313430U (en) | Electronic equipment and its protection circuit | |
| CN209250234U (en) | Protect circuit | |
| CN205790759U (en) | A kind of power lightning protection socket | |
| CN110474290A (en) | A kind of protection circuit against input over-voltage that brief and practical can restore automatically | |
| CN206164086U (en) | Electrostatic protection circuit | |
| CN208806608U (en) | A kind of the power lightning protection circuit and lightning protection power source of equipotential link | |
| CN220510775U (en) | Surge protector with backup protection function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |