CN104283200B - A kind of high-pressure electrostatic protection circuit - Google Patents
A kind of high-pressure electrostatic protection circuit Download PDFInfo
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- CN104283200B CN104283200B CN201310288890.6A CN201310288890A CN104283200B CN 104283200 B CN104283200 B CN 104283200B CN 201310288890 A CN201310288890 A CN 201310288890A CN 104283200 B CN104283200 B CN 104283200B
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Abstract
The invention discloses a kind of high-pressure electrostatic protection circuits, including reduction voltage circuit, inversion step-up circuit and Electro-static Driven Comb circuit；The reduction voltage circuit Input voltage terminal connects mains AC, and the mains AC of input is depressured as direct current light current by the reduction voltage circuit；The Input voltage terminal of the output voltage terminal connection inversion step-up circuit of the reduction voltage circuit, the output ground terminal of the reduction voltage circuit, the input grounding end of the inversion step-up circuit are grounded, and direct current light current inversion is DC high-voltage by the inversion step-up circuit；The Input voltage terminal of the output voltage terminal connection load of the inversion step-up circuit, is load supplying, and the output ground terminal connection of the inversion step-up circuit is used for the Electro-static Driven Comb circuit of release electrostatic.The present invention causes short circuit damage circuit board by providing a release way for electrostatic, to prevent and generate electric discharge phenomena between circuit board line.
Description
Technical field
The present invention relates to circuit boards, more particularly to a kind of high-pressure electrostatic protection circuit.
Background technique
Attention with people to indoor air quality promotes the air cleaning with functions such as sterilization, dedusting, purifications to produce
Product gradually flood the market.
The principle of air purifier is mostly using electrostatic precipitation or to wait anions dedusting at present, meeting in air purifier
There is the high-voltage electricity of volts thousands of or even up to ten thousand, which can generate very strong quiet on the reduction voltage circuit circuit board of air purifier
Electric field (it is main that reduction voltage circuit circuit board is coupled back by high-voltage ground wire, or reduction voltage circuit circuit board is returned by Space Coupling and is produced
Raw electrostatic field).Test discovery: when air purifier mesohigh electricity reaches 5KV or more, it is coupled back into the quiet of reduction voltage circuit circuit board
Electric strength is coupled back into the electrostatic of reduction voltage circuit circuit board then with upper when high-voltage electricity higher (such as tens of thousands of volts) up to 1-2KV
It rises.The electrostatic may make generation electric discharge phenomena between the route of reduction voltage circuit circuit board lead to short circuit damage circuit board, it is also possible to
The electronic component (especially to electrostatic sensitive component such as silicon material component) of breakdown circuit board leads to the failure of circuit board.
Therefore, the prior art could be improved.
Summary of the invention
The purpose of the present invention is to provide a kind of high-pressure electrostatic protection circuits, the high pressure in electric appliance to generate high-pressure electrostatic
Electrostatic provide a release way, to avoid generate high-pressure electrostatic electric appliance circuit board by static damage.
To achieve this purpose, the present invention adopts the following technical scheme:
The present invention provides a kind of high-pressure electrostatic protection circuits, including reduction voltage circuit, inversion step-up circuit and electrostatic to release
Put back to road；The reduction voltage circuit Input voltage terminal connects mains AC, and the mains AC of input drops in the reduction voltage circuit
Pressure is direct current light current；The Input voltage terminal of the output voltage terminal connection inversion step-up circuit of the reduction voltage circuit, the decompression electricity
The output ground terminal on road, the input grounding end of the inversion step-up circuit are grounded, and the inversion step-up circuit is by direct current light current
Inversion is DC high-voltage；The Input voltage terminal of the output voltage terminal connection load of the inversion step-up circuit, is load supplying,
The output ground terminal connection of the inversion step-up circuit is used for the Electro-static Driven Comb circuit of release electrostatic.
Wherein, the Electro-static Driven Comb circuit includes discharge resistance, and the output ground terminal of the inversion step-up circuit connects institute
State one end of discharge resistance, the firewire of the other end connection mains AC of the discharge resistance.
Wherein, the Electro-static Driven Comb circuit includes discharge resistance, and the output ground terminal of the inversion step-up circuit connects institute
State one end of discharge resistance, the zero curve of the other end connection mains AC of the discharge resistance.
Wherein, the reduction voltage circuit includes rectifier bridge, the output ground terminal ground connection of the rectifier bridge；
The Electro-static Driven Comb circuit includes discharge resistance, and the output ground terminal of the inversion step-up circuit connects the electric discharge
One end of resistance, the other end of the discharge resistance connect the output ground terminal of the rectifier bridge.
Wherein, the input grounding end ground connection of the reduction voltage circuit；
The Electro-static Driven Comb circuit includes discharge resistance, and the output ground terminal of the inversion step-up circuit connects the electric discharge
One end of resistance, the other end of the discharge resistance connect the input grounding end of the reduction voltage circuit.
Wherein, the discharge resistance is 1M Ω -50M Ω.
Wherein, the discharge resistance is the resistance formed using multiple resistance series connection adduction connection mode.
Wherein, the discharge resistance is the resistance formed using multiple resistor coupled in parallel or concatenated mode.
Wherein, the reduction voltage circuit include filter circuit, rectifier bridge, step-down switching power supply circuit, capacitor C1, C2, C3 with
And diode D1, the step-down switching power supply electricity routing transformer and switching tube Q1 composition；
The Input voltage terminal of the Input voltage terminal connection filter circuit of the reduction voltage circuit, the input of the reduction voltage circuit connect
Ground terminal connects the input grounding end of the filter circuit；The exchange input of the output voltage terminal connection rectifier bridge of the filter circuit
End, the DC output end of rectifier bridge anode connection capacitor C1 anode and transformer one end, rectifier bridge it is straight
The cathode of the cathode, capacitor C1 that flow output end is grounded；The current collection of the other end connection switch pipe Q1 of the primary coil of transformer
Pole, the emitter ground connection of switching tube；The anode of one end connection diode D1 of the secondary coil of the transformer, the transformer
Secondary coil the other end ground connection；The cathode of the diode D1, the anode of capacitor C2, C3 are all connected with the reduction voltage circuit
The cathode of output voltage terminal, described capacitor C2, C3 is grounded.
Wherein, the inversion step-up circuit includes THE BOOST SWITCHING CIRCUIT and rectification circuit；The THE BOOST SWITCHING CIRCUIT is by opening
Close pipe and step-up transformer composition；The Input voltage terminal of the inversion step-up circuit connects the primary coil of the step-up transformer
One end, the collector of the primary coil other end connection switch pipe of the step-up transformer, the emitter ground connection of switching tube；Boosting
The Input voltage terminal of secondary coil one end connection rectification circuit of transformer, the secondary coil other end of step-up transformer, rectification
The input grounding end of circuit is grounded；The output voltage terminal of rectification circuit connects the output voltage terminal of the inversion step-up circuit；
Wherein, the rectification circuit includes several rectification subelements；
Each rectification subelement includes first capacitor, the second capacitor, first diode, the second diode, rectifies subelement
Input voltage terminal connection one end of first capacitor, first diode anode, rectify the input grounding end connection the of subelement
One end of two capacitors rectifies the other end of the output voltage terminal connection first capacitor of subelement, the cathode of the second diode, rectification
The output ground terminal of subelement connects the anode of the other end of the second capacitor, the cathode of first diode, the second diode；
The Input voltage terminal of first rectification subelement is the Input voltage terminal of rectification circuit, and first rectifies subelement
Input grounding end is the input grounding end of rectification circuit, and the output voltage terminal of previous rectification subelement connects the latter commutator
The Input voltage terminal of unit connects, and the input that the output ground terminal of previous rectification subelement connects the latter rectification subelement connects
The output voltage terminal of ground terminal connection, the last one rectification subelement is the output voltage terminal of rectification circuit.
The implementation of the embodiments of the present invention has the following beneficial effects:
The embodiment of the present invention provides a release way by discharge resistance and other line relateds for electrostatic, will such as
Air purifier etc. generates the high-pressure electrostatic as caused by the high-voltage electricity of inversion step-up circuit in the electric appliance of high-pressure electrostatic and is released effectively,
To prevent generation electric discharge phenomena between circuit board line to cause short circuit damage circuit board, while also avoiding high-pressure electrostatic and hitting
The electronic component for wearing circuit board leads to the failure of circuit board.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, drawings discussed below is only this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of circuit diagram of high-pressure electrostatic protection circuit of the embodiment of the present invention.
Fig. 2 is the connection schematic diagram of the discharge resistance in a kind of high-pressure electrostatic protection circuit of the embodiment of the present invention.
Fig. 3 is the circuit diagram of the reduction voltage circuit in a kind of high-pressure electrostatic protection circuit of the embodiment of the present invention.
Fig. 4 is the circuit diagram of the inversion step-up circuit in a kind of high-pressure electrostatic protection circuit of the embodiment of the present invention.
Fig. 5 is a kind of circuit diagram of the first embodiment of high-pressure electrostatic protection circuit of the embodiment of the present invention.
Fig. 6 is a kind of circuit diagram of the second embodiment of high-pressure electrostatic protection circuit of the embodiment of the present invention.
Fig. 7 is a kind of circuit diagram of the 3rd embodiment of high-pressure electrostatic protection circuit of the embodiment of the present invention.
Specific embodiment
Below with reference to attached drawing of the invention, the technical scheme in the embodiment of the invention is clearly and completely described, shows
So, described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art's every other embodiment obtained without making creative work,
It shall fall within the protection scope of the present invention.
The embodiment of the present invention illustrates for electrostatic or wait negative ion types air purifier and how to realize one kind
The high-pressure electrostatic protection circuit of air purifier.A kind of high-pressure electrostatic protection circuit provided by the present invention is equally applicable to generate
Other electric appliances of high-pressure electrostatic.Below in conjunction with attached drawing 1- attached drawing 7, to high-pressure electrostatic protection circuit provided in an embodiment of the present invention
It describes in detail.
Referring to Figure 1, Fig. 1 is a kind of circuit diagram of high-pressure electrostatic protection circuit of the present invention.The high-pressure electrostatic protection electricity
Road includes reduction voltage circuit 100, inversion step-up circuit 200 and Electro-static Driven Comb circuit, and the Electro-static Driven Comb circuit includes discharge resistance
R, the Input voltage terminal of the output voltage terminal connection load of the inversion step-up circuit 200, is load supplying.
The Input voltage terminal of the reduction voltage circuit 100 connects mains AC, the mains AC decompression for that will input
For direct current light current；The Input voltage terminal of the output voltage terminal connection inversion step-up circuit 200 of the reduction voltage circuit 100, the drop
The output ground terminal of volt circuit 100, the input grounding end of the inversion step-up circuit 200 are grounded, and pass through the inversion boosting
Direct current light current inversion is DC high-voltage by circuit 200；The output voltage terminal connection of the inversion step-up circuit 200 loads defeated
Enter voltage end.Load described in this implementation is the purifying part of air purifier, i.e., the output electricity of the described inversion step-up circuit 200
Pressure side exports the purifying part that DC high-voltage is air purifier and powers, the output ground terminal of the inversion step-up circuit 200
The input grounding end of load is connected, and the output ground terminal of the inversion step-up circuit 200 is also connected with for release electrostatic
The output ground terminal of the inversion step-up circuit 200 is specifically connected the discharge resistance R's in this implementation by Electro-static Driven Comb circuit
One end, by the discharge resistance R by Electro-static Driven Comb.
Preferably, the resistance parameter of the discharge resistance R is 1M Ω -50M Ω, the selection of this resistance parameter should be guaranteed that resistance
The requirement of anti-insulation, therefore resistance parameter cannot be too small, the preferably resistance of M Ω rank；The selection of this resistance parameter should also expire
The demand that sufficient electrostatic is released effectively, therefore can not be too big, 50M Ω is not to be exceeded.Survey can be passed through when practical selection discharge resistance
The electrostatic size accumulated determines on amount circuit board.In the present embodiment, the resistance parameter of the discharge resistance is chosen for 1M Ω-
50M Ω, in this section, resistance parameter gets over that high impedance insulator effect is more preferable, and the resistance parameter the low, more is conducive to Electro-static Driven Comb.
Wherein, multiple resistance series, parallel can be used in the discharge resistance or the mode for adduction connection of connecting forms, when
When wherein short circuit occurs for some resistance, in addition resistance still is able to provide Electro-static Driven Comb path, thus guarantee the reliability of circuit,
It avoids because single resistive short causes release circuit to fail.
Referring to attached drawing 2(a), as one preferred embodiment of present aspect, the discharge resistance R uses 4 same resistance R1
Mode in parallel again of first connecting discharges when short circuit or open-circuit fault can occur to avoid a certain resistance R1 using such connection
Path still is able to play a role.
Referring to attached drawing 2(b), as another preferred embodiment of present aspect, the discharge resistance R uses 2 same resistance R2
Concatenated mode, when short trouble can occur to avoid wherein a certain resistance R2 using such connection, release way still is able to
It plays a role.
As another preferred embodiment of present aspect, several same resistance parallel ways are also can be used in the discharge resistance R
Access, when open-circuit fault can occur to avoid wherein a certain resistance using such connection, release way still is able to play a role.
Referring to Fig. 3, the reduction voltage circuit 100 specifically includes: filter circuit, rectifier bridge, step-down switching power supply circuit, electricity
Hold C1, C2, C3 and diode D1.
Wherein, the Input voltage terminal of the Input voltage terminal connection filter circuit of the reduction voltage circuit 100, the reduction voltage circuit
Input grounding end connect the input grounding end of the filter circuit.The step-down switching power supply electricity routing transformer and switching tube
Q1 composition, for being depressured the alternating current after rectifying and wave-filtering for direct current light current.The output voltage terminal connection of the filter circuit is whole
Flow the ac input end of bridge, the anode connection anode of capacitor C1 of the DC output end of rectifier bridge, the primary coil of transformer
One end, the cathode of the DC output end of rectifier bridge, the cathode of capacitor C1 are grounded.The other end of the primary coil of the transformer
The collector of connection switch pipe Q1, the emitter ground connection of switching tube Q1, the base stage of switching tube Q1 input PWM(Pulse Width
Modulation: pulse width modulation) signal.The anode of one end connection diode D1 of the secondary coil of the transformer, institute
State the other end ground connection of the secondary coil of transformer；The cathode of the diode D1, the anode of capacitor C2, C3 are all connected with the drop
The cathode of the output voltage terminal of volt circuit, described capacitor C2, C3 is grounded.Mains AC is by rectifier bridge rectification filter
Alternating current is depressured straight at 12~24V by wave, the switching power circuit being then made up of again switching tube Q1 and step-down transformer
Light current is flowed, the switching tube Q1 can integrate inside switching power source chip, can also be independent.Wherein the ground of rectifier bridge with
The light current power ground of output is isolated by step-down transformer.
Referring to Fig. 4, the inversion step-up circuit 200 includes THE BOOST SWITCHING CIRCUIT and rectification circuit；The boosted switch
Electric routing switch pipe Q2 and step-up transformer composition, for direct current light current to be reverse into AC high voltage.The inversion boosting electricity
The Input voltage terminal on road 200 connects primary coil one end of the step-up transformer, i.e., the primary coil of the described step-up transformer
The direct current light current of one end connection input, the primary coil other end of the step-up transformer are connect with the collector of switching tube Q2,
The emitter of switching tube Q2 is grounded, and the base stage of switching tube Q2 connects pwm signal.Secondary coil one end connection of step-up transformer is whole
The Input voltage terminal of current circuit, the secondary coil other end of step-up transformer, the input grounding end of rectification circuit are grounded；Rectification
The output voltage terminal of circuit connects the output voltage terminal of the inversion step-up circuit；The rectification circuit is used for AC high voltage
It is rectified into DC high-voltage.
Wherein, the rectification circuit includes several rectification subelements.
Specifically, each rectification subelement includes first capacitor C10, the second capacitor C20, first diode D10, the two or two
Pole pipe D20 rectifies one end of the Input voltage terminal connection first capacitor C10 of subelement, the anode of first diode D10, rectification
The input grounding end of subelement connects one end of the second capacitor C20, rectifies the output voltage terminal connection first capacitor C10 of subelement
The other end, the second diode D20 cathode, the output ground terminal for rectifying subelement connects the other end of the second capacitor C20, the
The anode of the cathode of one diode D10, the second diode D20.
Wherein, the Input voltage terminal of first rectification subelement is the Input voltage terminal of rectification circuit, first commutator
The input grounding end of unit is the input grounding end of rectification circuit, and the output voltage terminal of previous rectification subelement connects the latter
The Input voltage terminal connection of subelement is rectified, the output ground terminal of previous rectification subelement connects the latter rectification subelement
The output voltage terminal of the connection of input grounding end, the last one rectification subelement is the output voltage terminal of rectification circuit.
The rectification circuit is used to AC high voltage being rectified into DC high-voltage.It is i.e. that reduction voltage circuit output voltage terminal is defeated
12~24V direct current light current out is reverse into the alternating current of several KV by the switching tube Q2 and step-up transformer of inversion step-up circuit,
Boost to obtain the DC high-voltage of several KV or tens KV using by rectification circuit, also, the ground of the DC high-voltage with
The ground of the direct current light current is altogether.
Referring to Fig. 5, Fig. 5 is a kind of circuit of the first embodiment of high-pressure electrostatic protection circuit of the embodiment of the present invention
Figure.The input grounding end of reduction voltage circuit 100 described in the present embodiment connects the earth PE；The output of the inversion step-up circuit 200
Ground terminal connects the one end the discharge resistance R, and the input that the other end of the discharge resistance R connects the reduction voltage circuit 100 connects
Ground terminal constructs an Electro-static Driven Comb circuit by the input grounding end of the discharge resistance and reduction voltage circuit, by air purifier
In the high-pressure electrostatic as caused by the high-voltage electricity of inversion step-up circuit by discharge resistance be discharged into the earth, it is ensured that circuit board normally may be used
By operation.
As another preferred embodiment of the present invention, the output ground terminal of the inversion step-up circuit 200 connects the electric discharge
One end of resistance R, the other end of the discharge resistance R can also be directly connected to the earth, by discharge resistance by Electro-static Driven Comb to greatly
Ground.
Referring to Fig. 6, Fig. 6 is a kind of circuit of the second embodiment of high-pressure electrostatic protection circuit of the embodiment of the present invention
Figure.The output ground terminal of inversion step-up circuit 200 described in the present embodiment connects one end of the discharge resistance R, the electric discharge
The firewire (L) of the other end connection mains AC of resistance R, constructs an Electro-static Driven Comb circuit with this.Because of mains AC
Current supply circuit is formed between firewire and zero curve, constant voltage difference between the two is 220V, and zero curve is ground connection in feeder ear,
Therefore be connected to firewire be equivalent to be connected to the earth, when electrostatic is connected to firewire by discharge resistance, this electrostatic potential is higher than
When 220V, electrostatic will be by firewire using greatly dischargeing.I.e. by the high-voltage electricity of inversion step-up circuit in air purifier
Caused high-pressure electrostatic is smoothly discharged by the circuit of discharge resistance and the firewire of mains AC, effectively prevents circuit printed line
Electric discharge phenomena are generated between road and cause short circuit damage circuit board, while also avoiding the electronics member device of high-pressure electrostatic breakdown circuit board
Part leads to the failure of circuit board.
It should be noted that compared with previous embodiment, the other end of the discharge resistance R be connected to firewire with connect it is big
Ground the difference is that: residual static electricity after being discharged by firewire is 220V higher than being directly connected to the residual static electricity after the earth discharges,
And the electrostatic of this 220V is extremely limited on circuit influence.
Principle based on the above embodiment may be used also as another embodiment of the present invention are as follows: the inversion step-up circuit 200
Output ground terminal connect one end of the discharge resistance R, the zero curve of the other end connection mains AC of the discharge resistance R
(N), an Electro-static Driven Comb circuit is constructed with this, the high pressure as caused by the high-voltage electricity of inversion step-up circuit in air purifier is quiet
Electricity is smoothly discharged by the circuit of discharge resistance and the zero curve of mains AC.It should be understood that compared with being connected to firewire,
Because zero curve is grounded by feeder ear (power plant, substation, transformer), thus be connected to zero curve be equivalent to be directly connected to it is big
Ground.Electro-static Driven Comb equivalent is in the effect that the other end of the discharge resistance R is directly connected to ground wire.
Referring to Fig. 7, Fig. 7 is a kind of circuit of the 3rd embodiment of high-pressure electrostatic protection circuit of the embodiment of the present invention
Figure.The output ground terminal of inversion step-up circuit 200 described in the present embodiment connects one end of the discharge resistance R, the electric discharge
The rectifier bridge output ground terminal (rectifier bridge) of the other end connection reduction voltage circuit 100 of resistance R.Due to being connected to rectifier bridge,
It can be further connected by rectifier bridge internal electronic component with zero firewire of mains AC, be equivalent to and be connected to zero fire
Line, therefore an Electro-static Driven Comb circuit can be also constructed, so that electrostatic be made to be released effectively.It should be understood that working as circuit just
Often when work, the diode current flow of rectifier bridge will be formed into a loop to rectifier bridge by diode and zero curve or firewire, equivalent
The other end of discharge resistance be connected to zero curve or firewire provide Releasing loop for electrostatic in above-described embodiment.
By implementing the above embodiment of the present invention, other line relateds are connected by discharge resistance, provide one for electrostatic
Release way, by the Electro-static Driven Comb path, by the high pressure as caused by the high-voltage electricity of inversion step-up circuit in air purifier
Electrostatic is released effectively.It is found by actual test, by implementing the high-pressure electrostatic protection circuit of the above embodiment of the present invention, energy
The electrostatic for being coupled back into circuit board is enough set to be reduced to 0.3KV or less.To prevent generation electric discharge phenomena between circuit board line to make
The electronic component for damaging circuit board at short circuit, while also avoiding high-pressure electrostatic breakdown circuit board leads to the failure of circuit board.
The above disclosure is only the preferred embodiments of the present invention, cannot be wanted certainly with this to limit the right of the present invention
Range is sought, therefore, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention still belongs to this
Invent covered range.
Claims (8)
1. a kind of high-pressure electrostatic protection circuit, which is characterized in that returned including reduction voltage circuit, inversion step-up circuit and Electro-static Driven Comb
Road；The reduction voltage circuit Input voltage terminal connects mains AC, and the mains AC decompression of input is by the reduction voltage circuit
Direct current light current；The Input voltage terminal of the output voltage terminal connection inversion step-up circuit of the reduction voltage circuit, the reduction voltage circuit
Output ground terminal, the inversion step-up circuit input grounding end be grounded, the inversion step-up circuit is by direct current light current inversion
For DC high-voltage；The Input voltage terminal of the output voltage terminal connection load of the inversion step-up circuit, is load supplying, described
The output ground terminal connection of inversion step-up circuit is used for the Electro-static Driven Comb circuit of release electrostatic；
Wherein, the Electro-static Driven Comb circuit includes discharge resistance, is put described in the output ground terminal connection of the inversion step-up circuit
One end of resistance, the firewire of the other end connection mains AC of the discharge resistance；
Wherein, the discharge resistance is 1M Ω -50M Ω, and the load is purifying part.
2. high-pressure electrostatic protection circuit according to claim 1, which is characterized in that the Electro-static Driven Comb circuit includes electric discharge
Resistance, the output ground terminal of the inversion step-up circuit connect one end of the discharge resistance, the other end of the discharge resistance
Connect the zero curve of mains AC.
3. high-pressure electrostatic protection circuit according to claim 1, which is characterized in that the reduction voltage circuit includes rectifier bridge,
The output ground terminal of the rectifier bridge is grounded；
The Electro-static Driven Comb circuit includes discharge resistance, and the output ground terminal of the inversion step-up circuit connects the discharge resistance
One end, the other end of the discharge resistance connects the output ground terminal of the rectifier bridge.
4. high-pressure electrostatic protection circuit according to claim 1, which is characterized in that the input grounding end of the reduction voltage circuit
Ground connection；
The Electro-static Driven Comb circuit includes discharge resistance, and the output ground terminal of the inversion step-up circuit connects the discharge resistance
One end, the other end of the discharge resistance connects the input grounding end of the reduction voltage circuit.
5. according to any high-pressure electrostatic protection circuit of claim 2-4, which is characterized in that the discharge resistance is to use
Multiple resistance series connection adduction connection modes form.
6. according to any high-pressure electrostatic protection circuit of claim 2-4, which is characterized in that the discharge resistance is to use
Multiple resistor coupled in parallel or multiple resistance series systems composition.
7. high-pressure electrostatic protection circuit according to claim 1, which is characterized in that the reduction voltage circuit includes filtered electrical
Road, rectifier bridge, step-down switching power supply circuit, capacitor C1, C2, C3 and diode D1, the step-down switching power supply electricity routing variable
Depressor and switching tube Q1 composition；
The Input voltage terminal of the Input voltage terminal connection filter circuit of the reduction voltage circuit, the input grounding end of the reduction voltage circuit
Connect the input grounding end of the filter circuit；The ac input end of the output voltage terminal connection rectifier bridge of the filter circuit,
The anode of the anode connection capacitor C1 of the DC output end of rectifier bridge and one end of transformer, the direct current of rectifier bridge are defeated
The cathode of outlet, the cathode of capacitor C1 are grounded；The collector of the other end connection switch pipe Q1 of the primary coil of transformer, is opened
Close the emitter ground connection of pipe；The anode of one end connection diode D1 of the secondary coil of the transformer, time of the transformer
The other end ground connection of grade coil；The cathode of the diode D1, the anode of capacitor C2, C3 are all connected with the output of the reduction voltage circuit
The cathode of voltage end, described capacitor C2, C3 is grounded.
8. high-pressure electrostatic protection circuit according to claim 1, which is characterized in that the inversion step-up circuit includes boosting
Switching circuit and rectification circuit；The THE BOOST SWITCHING CIRCUIT is made of switching tube Q2 and step-up transformer；The inversion boosting electricity
The Input voltage terminal on road connects primary coil one end of the step-up transformer, the primary coil other end of the step-up transformer
The collector of connection switch pipe Q2, the emitter ground connection of switching tube Q2；Secondary coil one end of step-up transformer connects rectified current
The Input voltage terminal on road, the secondary coil other end of step-up transformer, the input grounding end of rectification circuit are grounded；Rectification circuit
Output voltage terminal connect the output voltage terminal of the inversion step-up circuit；
Wherein, the rectification circuit includes several rectification subelements；
Each rectification subelement includes first capacitor, the second capacitor, first diode, the second diode, rectifies the defeated of subelement
Enter one end of voltage end connection first capacitor, the anode of first diode, rectifies the second electricity of input grounding end connection of subelement
One end of appearance rectifies the other end of the output voltage terminal connection first capacitor of subelement, the cathode of the second diode, commutator list
The output ground terminal of member connects the anode of the other end of the second capacitor, the cathode of first diode, the second diode；
The Input voltage terminal of first rectification subelement is the Input voltage terminal of rectification circuit, the input of first rectification subelement
Ground terminal is the input grounding end of rectification circuit, and the output voltage terminal of previous rectification subelement connects the latter rectification subelement
Input voltage terminal connection, it is previous rectification subelement output ground terminal connect the latter rectify subelement input grounding end
The output voltage terminal of connection, the last one rectification subelement is the output voltage terminal of rectification circuit.
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| US20180130794A1 (en) * | 2016-11-04 | 2018-05-10 | Johnson Electric S.A. | Electronic circuit, integrated circuit and motor assembly |
| CN109351480A (en) * | 2018-09-20 | 2019-02-19 | 珠海格力电器股份有限公司 | High-voltage power supply circuit, control method, electrostatic precipitator and air purifier |
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