CN206892800U - A kind of leakage protection circuit and computer power supply - Google Patents
A kind of leakage protection circuit and computer power supply Download PDFInfo
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- CN206892800U CN206892800U CN201720671400.4U CN201720671400U CN206892800U CN 206892800 U CN206892800 U CN 206892800U CN 201720671400 U CN201720671400 U CN 201720671400U CN 206892800 U CN206892800 U CN 206892800U
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Abstract
The utility model belongs to electric leakage protection technology field, there is provided a kind of leakage protection circuit and computer power supply.In the utility model, the circuit includes leakage current acquisition module, leakage current test module, control module and switch module, the input of leakage current acquisition module is connected to the output end of AC power with the power input of leakage current test module altogether, the output end and detection output of leakage current acquisition module are connected with the input of switch module and the signal input part of leakage current test module respectively, and the input and output end of control module are connected with the output end of leakage current test module and the controlled end of switch module respectively.Leakage current acquisition module collection leakage current and output leakage current signal, when leakage current test module detects that leakage current signal meets preparatory condition, control module disconnects switch module and stops exporting alternating current.The leakage protection circuit is simple in construction, can be built in the shell of computer power supply and carry out earth leakage protective to computer power supply.
Description
Technical field
The utility model belongs to electric leakage protection technology field, more particularly to a kind of leakage protection circuit and computer power supply.
Background technology
At present, computer power supply does not possess creepage protection function generally, as the generally use of computer and people are pacified
The raising realized entirely, people are more and more high for the cry of safety utilization of electric power, increase creepage protection function mould in computer power supply
Block is imperative.
What is used in current home is used for earth leakage protective earth leakage circuit-breaker, and it is designed based on analog discrete components, body
Product is larger, therefore, it is impossible to which the earth leakage circuit-breaker is incorporated into the inside of computer power supply to be leaked electricity to computer power supply
Protection.
Therefore, existing earth leakage circuit-breaker exists and can not be incorporated into inside computer power supply by terms of because volume is larger
Calculate the problem of electromechanical source carries out earth leakage protective.
Utility model content
The purpose of this utility model is to provide a kind of leakage protection circuit, it is intended to solves existing earth leakage circuit-breaker institute
It is existing because volume is larger can not be incorporated into inside computer power supply with to computer power supply carry out earth leakage protective the problem of.
The utility model is achieved in that a kind of leakage protection circuit, is built in the shell of computer power supply, described
Leakage protection circuit includes leakage current acquisition module, leakage current test module, control module and switch module；
The input of the leakage current acquisition module is connected to and exchanged altogether with the power input of the leakage current test module
The output end of power supply, the output end and detection output of the leakage current acquisition module input with the switch module respectively
Be connected with the signal input part of the leakage current test module, the input and output end of the control module respectively with it is described
The output end of leakage current test module is connected with the controlled end of the switch module；
The leakage current that the leakage current acquisition module is exported to the AC power is acquired, and output leakage current is believed
Number to the leakage current test module, when the leakage current test module detects that the leakage current signal meets preparatory condition
Leakage control signal is exported to the control module, the control module exports according to the leakage control signal disconnects control letter
Number to the switch module, the switch module disconnects according to the disconnection control signal and stops output alternating current.
In the utility model, leakage protection circuit is built in the shell of computer power supply, and the circuit includes leakage current
Acquisition module, leakage current test module, control module and switch module, the input and leakage current test of leakage current acquisition module
The power input of module is connected to the output end of AC power, output end and the detection output difference of leakage current acquisition module altogether
It is connected with the input of switch module and the signal input part of leakage current test module, the input and output end of control module
It is connected respectively with the output end of leakage current test module and the controlled end of switch module.Leakage current acquisition module is to AC power
The leakage current exported is acquired and output leakage current signal, when leakage current test module detects that leakage current signal meets in advance
If during condition, control module disconnects switch module and stops exporting alternating current.The leakage protection circuit is simple in construction, can be built-in
With to computer power supply progress earth leakage protective in the shell of computer power supply.
Brief description of the drawings
Fig. 1 is the structure chart for the leakage protection circuit that the utility model embodiment provides；
Fig. 2 is the structure chart for the leakage protection circuit that another embodiment of the utility model provides；
Fig. 3 is the exemplary circuit figure for the leakage protection circuit that the utility model embodiment provides；
Fig. 4 is the exemplary circuit figure of auxiliary power module in the leakage protection circuit that the utility model embodiment provides.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
Fig. 1 shows the structure for the leakage protection circuit that the utility model embodiment provides, and for convenience of description, only shows
The part related to the utility model embodiment, details are as follows：
Leakage protection circuit 10 is built in the shell of computer power supply, and including leakage current acquisition module 100, leakage current
Detection module 200, control module 300 and switch module 400.
The input of leakage current acquisition module 100 is connected to alternating current altogether with the power input of leakage current test module 200
The output end in source 20, the output end and detection output of leakage current acquisition module 100 respectively with the input of switch module 400 and
The signal input part of leakage current test module 200 is connected, the input and output end of control module 300 respectively with leakage current
The output end of detection module 200 is connected with the controlled end of switch module 400.
The leakage current that leakage current acquisition module 100 is exported to AC power 20 is acquired, and output leakage current signal
To leakage current test module 200, electric leakage is exported when leakage current test module 200 detects that leakage current signal meets preparatory condition
For control signal to control module 300, control module 300 exports according to leakage control signal disconnects control signal to switch module
400, switch module 400 disconnects according to disconnection control signal and stops exporting alternating current.
Specifically, caused skew after leakage current test module 200 detects that leakage current signal flows through preset resistance
When voltage is more than preset voltage value, leakage current test module 200 exports leakage control signal to control module 300.
Fig. 2 shows the structure for the leakage protection circuit 10 that another embodiment of the utility model provides, for convenience of description,
The part related to the utility model embodiment is illustrate only, details are as follows：
Leakage protection circuit 10 also includes auxiliary power module 500；
The input of auxiliary power module 500 is connected with AC power 20, the first output end of auxiliary power module 500
VCC1 is connected with the power end of switch module 400, the power end of control module 300 and the power supply of leakage current test module 200
End is connected to the second output end VCC2 of auxiliary power module 500 altogether.
The alternating current that auxiliary power module 500 is exported to AC power 20 carries out rectification, and to the direct current after rectification
Voltage transformation is carried out, output first voltage is that switch module 400 is powered, while exports second voltage as control module 300 and leakage
Current detection module 200 is powered.
Specifically, the first output end VCC1 of auxiliary power module 500 output voltage is 12V, the second output end VCC2
Output voltage be 5V.
Fig. 3 shows the circuit diagram for the leakage protection circuit 10 that the utility model embodiment provides, for convenience of description, only
The part related to the utility model embodiment is shown, details are as follows：
As the embodiment of the utility model one, leakage current acquisition module 100 is zero sequence current mutual inductor L1；
Zero sequence current mutual inductor L1 first input end and the input that the second input is leakage current acquisition module 100,
Zero sequence current mutual inductor L1 first input end and the second input are defeated with the first output end of AC power 20 and second respectively
Go out end to be connected, zero sequence current mutual inductor L1 the first output end and the second output end are the output of leakage current acquisition module 100
End, zero sequence current mutual inductor L1 the first detection output and the second detection output are the detection of leakage current acquisition module 100
Output end.
As the embodiment of the utility model one, leakage current test module 200 includes：
Leakage current test unit 201 and isolated location 202；
The first signal input part and secondary signal input of leakage current test unit 201 are leakage current test module 200
Signal input part, the first signal input part and secondary signal input of leakage current test unit 201 respectively with zero-sequence current
Transformer L1 the first detection output is connected with the second detection output, and the first power supply of leakage current test unit 201 is defeated
Enter end and the power input that second source input is leakage current test module 200, the first of leakage current test unit 201
Power input and second source input are connected with zero sequence current mutual inductor L1 first input end and the second input respectively
Connect, the second source input and output end of leakage current test unit 201 respectively with the first power end of isolated location 202 and
Input is connected, the output end of isolated location 202 and second source end be respectively leakage current test module 200 output end and
Power end.
Specifically, the output electric leakage control when leakage current test unit 201 detects that leakage current signal meets preparatory condition
Leakage control signal is carried out isolation and amplifier by signal to isolation module, isolation module.
As the embodiment of the utility model one, leakage current test unit 201 includes：
Leakage current test chip U1, first resistor R1, second resistance R2,3rd resistor R3, the electricity of the first electric capacity C1 and second
Hold C2；
Leakage current test chip U1 in-phase input end VREF and first resistor R1 first end are respectively leakage current test
The first signal input part and secondary signal input of unit 201, first resistor R1 the second end and the first of second resistance R2
End is connected to leakage current test chip U1 inverting input VFB, second resistance R2 the second end and leakage current test chip U1 altogether
Amplification output end OUT be connected, 3rd resistor R3 first end is the first power input of leakage current test unit 201,
3rd resistor R3 the second end and the first electric capacity C1 first end are connected to leakage current test chip U1 the first power end L altogether, the
The second source end N at one electric capacity C1 the second end, the second electric capacity C2 first end and leakage current test chip U1 connects to be formed Lou altogether
The second of the second source input of current detecting unit 201, leakage current test chip U1 drive end SCR and the second electric capacity C2
End connects the output end to form leakage current test unit 201 altogether.
Preferably, leakage current test chip U1 model FAN4146.
As the embodiment of the utility model one, isolated location 202 includes：
4th resistance R4, the 5th resistance R5, the 6th resistance R6, the first diode D1 and photo-coupler U2；
4th resistance R4 first end is the input of isolated location 202, the 4th resistance R4 the second end and the one or two pole
Pipe D1 negative electrode is connected to photo-coupler U2 first input end altogether, the first diode D1 anode and the first of photo-coupler U2 defeated
Go out end and connect the first power end to form isolated location 202, the 5th resistance R5 first end and photo-coupler U2 the second input altogether
End is connected, and the 5th resistance R5 the second end is the second source end of isolated location 202, photo-coupler U2 the second output end with
6th resistance R6 first end connects the output end to form isolated location 202 altogether, and the 6th resistance R6 the second end is connected with power supply
Connect.
As the embodiment of the utility model one, switch module 400 includes：
7th resistance R7, the 8th resistance R8, the 9th resistance R9, the first relay RY1, the second relay RY2 and first are opened
Close pipe Q；
7th resistance R7 first end connects the power end to form switch module 400 altogether with the 8th resistance R8 first end, the
The coil M1 at seven resistance R7 the second end, the 8th resistance R8 the second end and the first relay RY1 input is connected to second altogether
Relay RY2 coil M2 input, the first relay RY1 coil M1 output end and the second relay RY2 coil
M2 output end is connected to first switch pipe Q input, first switch pipe Q output end and the 9th resistance R9 first end altogether
With being connected to power supply altogether, first switch pipe Q controlled end and the 9th resistance R9 the second end connect to form the controlled of switch module 400 altogether
End, the first relay RY1 normally opened contact N1 input and the second relay RY2 normally opened contact N2 input are to open
Close the normally opened contact of the input of module 400, the first relay RY1 normally opened contact N1 input and the second relay RY2
N2 input is connected with zero sequence current mutual inductor L1 the first output end and the second output end respectively, the first relay RY1
Normally opened contact N1 output end and the second relay RY2 normally opened contact N2 output end be switch module 400 output end.
Preferably, first switch pipe Q is metal-oxide-semiconductor.
As the embodiment of the utility model one, control module 300 includes：
Control chip U3, the tenth resistance R10, the 11st resistance R11, the 12nd resistance R12, the 13rd resistance R13, the tenth
Nine resistance R19, the 3rd electric capacity C3 and key switch S；
Control chip U3 the 4th input/output terminal RA4 be control module 300 input, the first of the tenth resistance R10
Hold as the output end of control module 300, the tenth resistance R10 the second end and control chip U3 the 3rd input/output terminal RA3 phases
Connection, control chip U3 the first power end VDD, the 19th resistance R19 first end and the 13rd resistance R13 first end
The power end to form control module 300, control chip U3 second source end VPP and the 19th resistance R19 the second end are connect altogether
The 3rd electric capacity C3 first end, the 3rd electric capacity C3 the second end, control chip U3 earth terminal VSS and key switch S are connected to altogether
First end be connected with power supply, key switch S the second end and the 11st resistance R11 first end are connected to the 12nd altogether
Resistance R12 first end, the 11st resistance R11 the second end are connected with control chip U3 the first input/output terminal RA1, the
12 resistance R12 the second end is connected to control chip U3 the second input/output terminal with the 13rd resistance R13 the second end altogether
RA2。
Preferably, control chip U3 model PIC12F1822.
As the embodiment of the utility model one, as shown in figure 4, auxiliary power module 500 includes：
Fuse FU, the second diode D2, the 3rd diode D3, the 4th diode D4, the 5th diode D5, the six or two pole
Pipe D6, the 4th electric capacity C4, the 5th electric capacity C5, the 6th electric capacity C6, the 7th electric capacity C7, the 8th electric capacity C8, the 9th electric capacity C9, the tenth
Electric capacity C10, the 11st electric capacity C11, the 12nd electric capacity C12, the 13rd electric capacity C13, the 14th electric capacity C14, the 14th resistance
R14, the 15th resistance R15, the 16th resistance R16, the 17th resistance, the 18th resistance R18, common mode inductance LF1, the first inductance
L2, decompression chip U4, voltage conversion chip U5；
Fuse FU input and the 3rd diode D3 negative electrode be auxiliary power module 500 input, fuse
FU input and the 3rd diode D3 negative electrode are connected with the first output end of AC power 20 and the second output end respectively,
Fuse FU output end is connected with the second diode D2 anode, and the of the second diode D2 negative electrode and the 4th electric capacity C4
One end is connected to common mode inductance LF1 first input end altogether, and the second end of the 3rd diode D3 anode and the 4th electric capacity C4 connects altogether
In common mode inductance LF1 the second input, common mode inductance LF1 the first output end, decompression chip U4 the first drain electrode end Dr1 and
Second drain electrode end Dr2 is connected to the 5th electric capacity C5 first end, the 6th electric capacity C6 first end and the 7th electric capacity C7 first end altogether
Decompression chip U4 offset voltage end Vc is connected to altogether, and the 6th electric capacity C6 the second end is connected with the 14th resistance R14 first end
Connect, the 14th resistance R14 the second end, the 7th electric capacity C7 the second end, the 8th electric capacity C8 first end, the of the 9th electric capacity C9
One end, the 15th resistance R15 first end, the tenth electric capacity C10 first end, the 4th diode D4 negative electrode and the first inductance L2
Input be connected to decompression chip U4 earth terminal GND1, the 8th electric capacity C8 the second end and the moon with the 5th diode D5 altogether
The second end for being extremely connected to decompression chip U4 power end VCC3, the 9th electric capacity C9 altogether is connected with being depressured chip U4 current limliting end I
Connect, the 15th resistance R15 the second end is connected to decompression chip U4 feedback voltage end with the 16th resistance R16 first end altogether
Vf, the 5th electric capacity C5 the second end, the 4th diode D4 anode, the 11st electric capacity C11 first end, the 12nd electric capacity C12
First end and the 17th resistance first end with being connected to power supply altogether, the 16th resistance R16 the second end, the tenth electric capacity C10
Second end and the 6th diode D6 negative electrode are connected to the 18th resistance R18 first end, the 5th diode D5 anode and altogether
18 resistance R18 are connected, the first inductance L2 output end, the 11st electric capacity C11 the second end, the of the 12nd electric capacity C12
Two ends, the second end of the 17th resistance, the 6th diode D6 anode, the 13rd electric capacity C13 first end and voltage conversion core
Piece U5 input Vin meets the first output end VCC1 to form auxiliary power module 500 altogether, the 13rd electric capacity C13 the second end,
14th electric capacity C14 first end and voltage conversion chip U5 earth terminal GND2 with being connected to power supply altogether, voltage conversion chip U5
Output end vo ut and the 14th electric capacity C14 the second end meet the second output end VCC2 to form auxiliary power module 500 altogether.
Preferably, chip U4 model FSL306LRN, voltage conversion chip U5 model 7805 are depressured.
The operation principle of leakage protection circuit 10 is illustrated below in conjunction with Fig. 3 and Fig. 4, details are as follows：
The leakage current that zero sequence current mutual inductor L1 is exported to AC power 20 in Fig. 3 is acquired, and output leakage current
Signal is to leakage current test unit 201, and after leakage current signal flows through second resistance R2, leakage current test chip U1 amplification is defeated
When to go out to hold the current potential of OUT current potential higher or lower than the in-phase input end VREF of detection of electrical leakage chip in 1 millisecond be 3.5V, leak
Current detecting chip U1 drive end SCR output square-wave signals, isolated location 202 export the square wave signal isolation to control core
Piece U3 the 4th input/output terminal RA4, control chip U3 receive export after square-wave signal low level to first switch pipe Q by
End is controlled, so that first switch pipe Q is turned off, so as to which the first relay RY1 coil M1 and the second relay RY2 coil M2 break
Electricity, the first relay RY1 normally opened contact N1 and the second relay RY2 normally opened contact N2 disconnect, and switch module 400 stops
Export alternating current.In addition, for control module 300, after switch S is pushed button, key switch S closures, so as to control chip
U3 resets.
In Fig. 4, the alternating current progress half-wave that the second diode D2 and the 3rd diode D3 are exported to AC power 20 is whole
Stream, the common mode EMI filtration module that the direct current after rectification forms through the 4th electric capacity C4, common mode inductance LF1 and the 5th electric capacity C5 enter
Row filtering, filtered direct current are converted to 12V DC electricity output, 12V DC electricity after decompression chip U4 carries out decompression processing
5V direct current electricity outputs are converted to through voltage conversion chip U5.
Application advantage based on above-mentioned leakage protection circuit in computer power supply, the utility model additionally provide a kind of bag
Include the computer power supply of above-mentioned leakage protection circuit.
In the utility model embodiment, leakage protection circuit is built in the shell of computer power supply, and the circuit includes
Leakage current acquisition module, leakage current test module, control module and switch module, the input of leakage current acquisition module and electric leakage
The power input of stream detection module is connected to the output end of AC power altogether, and the output end of leakage current acquisition module and detection export
End be connected respectively with the input of switch module and the signal input part of leakage current test module, the input of control module and
Output end is connected with the output end of leakage current test module and the controlled end of switch module respectively.Leakage current acquisition module is to handing over
The leakage current that stream power supply is exported is acquired and output leakage current signal, when leakage current test module detects leakage current signal
When meeting preparatory condition, control module disconnects switch module and stops exporting alternating current.The leakage protection circuit is simple in construction,
It can be built in the shell of computer power supply, while the circuit is for the fast response time of leakage current, can be electromechanical to calculating in time
Source carries out earth leakage protective.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (10)
1. a kind of leakage protection circuit, it is characterised in that the leakage protection circuit is built in the shell of computer power supply, bag
Include leakage current acquisition module, leakage current test module, control module and switch module；
The input of the leakage current acquisition module and the power input of the leakage current test module are connected to AC power altogether
Output end, the output end and detection output of the leakage current acquisition module input with the switch module and institute respectively
The signal input part for stating leakage current test module is connected, the input and output end of the control module respectively with the electric leakage
The output end of stream detection module is connected with the controlled end of the switch module；
The leakage current that the leakage current acquisition module is exported to the AC power is acquired, and output leakage current signal is extremely
The leakage current test module, exported when the leakage current test module detects that the leakage current signal meets preparatory condition
For leakage control signal to the control module, the control module exports according to the leakage control signal disconnects control signal extremely
The switch module, the switch module disconnect according to the disconnection control signal and stop exporting alternating current.
2. leakage protection circuit as claimed in claim 1, it is characterised in that the leakage protection circuit includes accessory power supply mould
Block；
The input of the auxiliary power module is connected with the AC power, the first output end of the auxiliary power module
It is connected with the power end of the switch module, the power end of the control module and the power end of the leakage current test module
The second output end of the auxiliary power module is connected to altogether；
The alternating current that the auxiliary power module is exported to the AC power carries out rectification, and the direct current after rectification is entered
Row voltage transformation, output first voltage is powered for the switch module, while exports second voltage as the control module and institute
State leakage current test module for power supply.
3. leakage protection circuit as claimed in claim 2, it is characterised in that the leakage current acquisition module is that zero-sequence current is mutual
Sensor；
The first input end of the zero sequence current mutual inductor and the input that the second input is the leakage current acquisition module, institute
State zero sequence current mutual inductor first input end and the second input respectively with the first output end of the AC power and second
Output end is connected, and the first output end and the second output end of the zero sequence current mutual inductor are the leakage current acquisition module
Output end, the first detection output and the second detection output of the zero sequence current mutual inductor are the leakage current acquisition module
Detection output.
4. leakage protection circuit as claimed in claim 3, it is characterised in that the leakage current test module is examined including leakage current
Survey unit and isolated location；
The first signal input part and secondary signal input of the leakage current test unit are the leakage current test module
Signal input part, the first signal input part and secondary signal input of the leakage current test unit are electric with the zero sequence respectively
First detection output of current transformer is connected with the second detection output, and the first power supply of the leakage current test unit is defeated
Enter end and the power input that second source input is the leakage current test module, the first of the leakage current test unit
Power input and second source the input first input end and the second input phase with the zero sequence current mutual inductor respectively
Connection, the second source input and output end of the leakage current test unit the first power end with the isolated location respectively
It is connected with input, the output end of the isolated location and second source end are respectively the output of the leakage current test module
End and power end.
5. leakage protection circuit as claimed in claim 4, it is characterised in that the leakage current test unit is examined including leakage current
Survey chip, first resistor, second resistance, 3rd resistor, the first electric capacity and the second electric capacity；
The in-phase input end of the leakage current test chip and the first end of the first resistor are respectively the leakage current test
The first signal input part and secondary signal input of unit, the second end of the first resistor and the first of the second resistance
End is connected to the inverting input of the leakage current test chip, the second end of the second resistance and the leakage current test core altogether
The amplification output end of piece is connected, and the first end of the 3rd resistor is the first power input of the leakage current test unit
The first end of end, the second end of the 3rd resistor and first electric capacity is connected to the first electricity of the leakage current test chip altogether
Source, the second source at the second end of first electric capacity, the first end of second electric capacity and the leakage current test chip
End connects the second source input to form the leakage current test unit altogether, the drive end of the leakage current test chip with it is described
Second end of the second electric capacity connects the output end to form the leakage current test unit altogether.
6. leakage protection circuit as claimed in claim 4, it is characterised in that the isolated location includes the 4th resistance, the 5th
Resistance, the 6th resistance, the first diode and photo-coupler；
The first end of 4th resistance be the isolated location input, the second end and described first of the 4th resistance
The negative electrode of diode is connected to the first input end of the photo-coupler, anode and the photo-coupler of first diode altogether
The first output end connect the first power end to form the isolated location altogether, first end and the optical coupling of the 5th resistance
Second input of device is connected, and the second end of the 5th resistance is the second source end of the isolated location, the optocoupler
Second output end of clutch and the first end of the 6th resistance connect the output end to form the isolated location, the 6th electricity altogether
Second end of resistance is connected with power supply.
7. leakage protection circuit as claimed in claim 3, it is characterised in that the switch module includes the 7th resistance, the 8th
Resistance, the 9th resistance, the first relay, the second relay and first switch pipe；
The first end of 7th resistance connects the power end to form the switch module altogether with the first end of the 8th resistance, institute
The input for stating the coil at the second end of the 7th resistance, the second end of the 8th resistance and first relay is connected to institute altogether
State the input of the coil of the second relay, the output end of the coil of first relay and the coil of second relay
Output end be connected to the input of the first switch pipe altogether, the of the output end of the first switch pipe and the 9th resistance
With being connected to power supply altogether, the second end of the controlled end of the first switch pipe and the 9th resistance connects to form the switch altogether for one end
The input of the normally opened contact of the controlled end of module, the input of the normally opened contact of first relay and second relay
Hold as the input of the switch module, the input of the normally opened contact of first relay and second relay it is normal
The input for opening contact is connected with the first output end of the zero sequence current mutual inductor and the second output end respectively, and described first
The output end of the normally opened contact of the output end of the normally opened contact of relay and second relay is defeated for the switch module
Go out end.
8. leakage protection circuit as claimed in claim 2, it is characterised in that the control module includes control chip, the tenth
Resistance, the 11st resistance, the 12nd resistance, the 13rd resistance, the 19th resistance, the 3rd electric capacity and key switch；
4th input/output terminal of the control chip is the input of the control module, and the first end of the tenth resistance is
The output end of the control module, the second end of the tenth resistance are connected with the 3rd input/output terminal of the control chip
Connect, the first end of the first power end of the control chip, the first end of the 19th resistance and the 13rd resistance is total to
The power end to form the control module is connect, the second source end of the control chip and the second end of the 19th resistance are total to
It is connected to the first end of the 3rd electric capacity, the second end of the 3rd electric capacity, the earth terminal of the control chip and the button
The first end of switch is connected with power supply, and the second end of the key switch and the first end of the 11st resistance connect altogether
In the first end of the 12nd resistance, the second end of the 11st resistance and the first input/output terminal of the control chip
It is connected, the second end of the 12nd resistance is connected to the second of the control chip altogether with the second end of the 13rd resistance
Input/output terminal.
9. leakage protection circuit as claimed in claim 2, it is characterised in that the auxiliary power module includes fuse, the
Two diodes, the 3rd diode, the 4th diode, the 5th diode, the 6th diode, the 4th electric capacity, the 5th electric capacity, the 6th electricity
Appearance, the 7th electric capacity, the 8th electric capacity, the 9th electric capacity, the tenth electric capacity, the 11st electric capacity, the 12nd electric capacity, the 13rd electric capacity, the tenth
Four electric capacity, the 14th resistance, the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, common mode inductance, the first electricity
Sense, decompression chip, voltage conversion chip；
The negative electrode of the input of the fuse and the 3rd diode is the input of the auxiliary power module, described molten
The input of disconnected device and the negative electrode of the 3rd diode the first output end and the second output end with the AC power respectively
Be connected, the output end of the fuse is connected with the anode of second diode, the negative electrode of second diode with
The first end of 4th electric capacity is connected to the first input end of the common mode inductance altogether, the anode of the 3rd diode with it is described
Second end of the 4th electric capacity is connected to the second input of the common mode inductance altogether, the first output end of the common mode inductance, described
It is depressured the first drain electrode end of chip and the second drain electrode end is connected to the first end of the 5th electric capacity altogether, the first of the 6th electric capacity
End and the 7th electric capacity first end be connected to altogether it is described decompression chip offset voltage end, the second end of the 6th electric capacity with
The first end of 14th resistance is connected, the second end of the 14th resistance, the second end of the 7th electric capacity, described
The first end of 8th electric capacity, the first end of the 9th electric capacity, the first end of the 15th resistance, the of the tenth electric capacity
The input of one end, the negative electrode of the 4th diode and first inductance is connected to the earth terminal of the decompression chip, institute altogether
State the power end that the second end of the 8th electric capacity is connected to the decompression chip with the negative electrode of the 5th diode altogether, the 9th electricity
The second end held is connected with the current limliting end of the decompression chip, the second end and the 16th resistance of the 15th resistance
First end be connected to the feedback voltage end of the decompression chip altogether, the second end of the 5th electric capacity, the 4th diode
Anode, the first end of the 11st electric capacity, the first end of the 12nd electric capacity and the first end of the 17th resistance are total to
With being connected to power supply, the second end of the 16th resistance, the second end of the tenth electric capacity and the negative electrode of the 6th diode
The first end of the 18th resistance is connected to altogether, and the anode of the 5th diode is connected with the 18th resistance, described
The output end of first inductance, the second end of the 11st electric capacity, the second end of the 12nd electric capacity, the 17th resistance
The second end, the anode of the 6th diode, the 13rd electric capacity first end and the voltage conversion chip input
End connects the first output end to form the auxiliary power module, the second end of the 13rd electric capacity, the 14th electric capacity altogether
First end and the voltage conversion chip earth terminal with being connected to power supply altogether, the output end of the voltage conversion chip with it is described
Second end of the 14th electric capacity connects the second output end to form the auxiliary power module altogether.
10. a kind of computer power supply, it is characterised in that the computer power supply includes the leakage described in any one of claim 1 to 9
Electric protection circuit.
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| CN108879600A (en) * | 2018-08-24 | 2018-11-23 | 广东好太太科技集团股份有限公司 | A kind of clothes airing machine leakage protection system and its earth leakage protecting method |
| CN109167390A (en) * | 2018-09-21 | 2019-01-08 | 华为技术有限公司 | A kind of photovoltaic inversion system |
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| CN111355220A (en) * | 2020-03-02 | 2020-06-30 | 珠海格力电器股份有限公司 | Tripping control device, power supply system and tripping control method thereof |
| CN112798981A (en) * | 2020-12-29 | 2021-05-14 | 江苏航天大为科技股份有限公司 | Road traffic system with alternating current monitoring and protecting functions |
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| TWI659218B (en) * | 2018-05-23 | 2019-05-11 | 車王電子股份有限公司 | Leakage detection device and battery pack |
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| CN108879600A (en) * | 2018-08-24 | 2018-11-23 | 广东好太太科技集团股份有限公司 | A kind of clothes airing machine leakage protection system and its earth leakage protecting method |
| CN109167390A (en) * | 2018-09-21 | 2019-01-08 | 华为技术有限公司 | A kind of photovoltaic inversion system |
| CN109167390B (en) * | 2018-09-21 | 2021-11-26 | 华为数字能源技术有限公司 | Photovoltaic power generation inverter system |
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Effective date of registration: 20210818 Address after: 030000 Gangyuan North Road, Zhongbei high tech Zone, Taiyuan City, Shanxi Province Patentee after: Great Wall Power Technology Co.,Ltd. Address before: 518000 Great Wall computer building, science and Technology Park, Nanshan District, Shenzhen City, Guangdong Province Patentee before: China Great Wall Technology Group Co.,Ltd. |