High-efficiency low-cost high-voltage ignition detection circuit

Abstract

The utility model discloses a high-efficiency low-cost high-voltage ignition detection circuit, which belongs to the technical field of high-voltage power supply electronics and comprises a high-voltage current detection resistor, a piezoresistor, a filter capacitor, a blocking capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first triode and a second triode. By means of the mode, faults such as electric field ignition and arcing can be found rapidly, meanwhile, the method is suitable for ignition detection of power supplies with different power sizes, positive and negative high-voltage power supplies can conduct effective ignition detection, and the anti-interference capacity is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to high voltage power electronic technology field, concretely relates to a kind of high-efficiency low-cost high-voltage spark detection circuit. BACKGROUND

[0002] In prior art, after static type oil fume purifier, air purifier, electrostatic precipitator and other equipment run for a long time, electric field pollution, cleaning is not thorough, insulator dirt, equipment aging, foreign matter invasion, electric field deformation often have spark, arc phenomenon;Normal operation time with air humidity, particle pollutant concentration change also can cause spark arc phenomenon to occur;Long time spark arc is easy to cause fire and cause fire hazard, simultaneously in the process of spark arc, often accompanied by intense ionization phenomenon, there are a lot of noise and ozone release, environmental pollution, health impact, therefore, the spark arc phenomenon of purification electric field needs to be detected quickly and found.

[0003] Based on this, the utility model designs a kind of high-efficiency low-cost high-voltage spark detection circuit to solve above-mentioned problem. UTILITY MODEL CONTENT

[0004] In view of the above-mentioned shortcomings of prior art, the utility model provides a kind of high-efficiency low-cost high-voltage spark detection circuit.

[0005] To achieve the above object, the utility model is realized by the following technical scheme:

[0006] A kind of high-efficiency low-cost high-voltage spark detection circuit, including high-voltage current detection resistance, voltage-dependent resistor, filter capacitor, direct current blocking capacitor, first resistance, second resistance, third resistance, fourth resistance, fifth resistance, triode one and triode two;

[0007] The high-voltage current detection resistance is connected in series in the output circuit of the external high-voltage power supply, the high-voltage current detection resistance, the voltage-dependent resistance and the filter capacitor are connected in parallel, one end of the high-voltage current detection resistance, the voltage-dependent resistance and the filter capacitor is electrically connected with one end of the direct-current blocking capacitor, the other end of the high-voltage current detection resistance, the voltage-dependent resistance and the filter capacitor is grounded, the other end of the direct-current blocking capacitor is electrically connected with one end of the third resistance, the connecting circuit between the direct-current blocking capacitor and the third resistance is electrically connected with one end of the second resistance, the other end of the second resistance is electrically connected with the base of the second triode, the connecting circuit between the second resistance and the second triode is electrically connected with one end of the first resistance, the other end of the first resistance and the emitter of the second triode are grounded, the collector of the second triode is electrically connected with the interrupt pin of the external single-chip microcomputer, the other end of the third resistance is electrically connected with one end of the fourth resistance, the connecting circuit between the third resistance and the fourth resistance is electrically connected with the emitter of the first triode, the collector of the first triode is electrically connected with the interrupt pin of the external single-chip microcomputer, the base of the first triode is electrically connected with one end of the fifth resistance, the connecting circuit between the first triode and the fifth resistance is electrically connected with the other end of the fourth resistance, and the other end of the fifth resistance is grounded.

[0008] Further, the high-voltage current detection resistance is set to 20Ω-1000Ω.

[0009] Further, the voltage-dependent resistance is set to a voltage-dependent voltage of not higher than 25V and a clamping voltage of not higher than 40V.

[0010] Further, the filter capacitor is set to a capacity of 1nF-1μF and a withstand voltage of not lower than 100V.

[0011] Further, the direct-current blocking capacitor is set to a capacity of 0.1μF-10μF.

[0012] Further, the first resistance, the fourth resistance and the fifth resistance are set to 1kΩ.

[0013] Further, the second resistance and the third resistance are set to 2.2kΩ.

[0014] Further, the first triode and the second triode are set to NPN triodes, the collector breakdown voltage of which is higher than 25V, the collector current of which is higher than 500mA, the collector cutoff current of which is lower than 100nA, and the saturation voltage of which is lower than 0.6V.

[0015] Compared with the prior art, the circuit has the advantages that: 1, the high-voltage current fluctuation detected by the capacitor coupling is filtered to remove the direct current component in the operation of the high-voltage power supply, and only the alternating current component is detected, which is not affected by the size of the direct current and the size of the power supply power; the adaptability is wide, and appropriate parameter adjustment can adapt to high-voltage power supply spark detection of different power sizes;

[0016] 2. The circuit is positive and negative high voltage universal, whether it is positive high voltage power supply or negative high voltage power supply can effectively detect high voltage spark phenomenon;

[0017] 3. The circuit uses the voltage of the PN junction of the three-stage tube as the threshold judgment of whether to spark, is not affected by external interference, increases the anti-interference ability, and avoids the misoperation of sparking. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained from these drawings without creative labor.

[0019] Figure 1 The circuit diagram of the high-efficiency low-cost high-voltage spark detection circuit of the present application. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0021] Embodiment one: in some embodiments, referring to the drawings of the specification Figure 1 A high-efficiency low-cost high-voltage spark detection circuit, comprising a high-voltage current detection resistor R1, a voltage-dependent resistor RV1, a filter capacitor C1, a direct-current blocking capacitor C2, a first resistor R2, a second resistor R3, a third resistor R4, a fourth resistor R5, a fifth resistor R6, a triode one Q1 and a triode two Q2.

[0022] The high-voltage current detection resistor R1 is connected in series in the output circuit of the external high-voltage power supply, the high-voltage current detection resistor R1, the voltage-dependent resistor RV1 and the filter capacitor C1 are connected in parallel with each other, one end of the high-voltage current detection resistor R1, the voltage-dependent resistor RV1 and the filter capacitor C1 is electrically connected to one end of the direct-current blocking capacitor C2, the other end of the high-voltage current detection resistor R1, the voltage-dependent resistor RV1 and the filter capacitor C1 is grounded, the other end of the direct-current blocking capacitor C2 is electrically connected to one end of the third resistor R4, the connection circuit between the direct-current blocking capacitor C2 and the third resistor R4 is electrically connected to one end of the second resistor R3, the other end of the second resistor R3 is electrically connected to the base of the second transistor Q2, the connection circuit between the second resistor R3 and the second transistor Q2 is electrically connected to one end of the first resistor R2, the other end of the first resistor R2 and the emitter of the second transistor Q2 are grounded, the collector of the second transistor Q2 is electrically connected to the interrupt pin of the external single-chip microcomputer, the other end of the third resistor R4 is electrically connected to one end of the fourth resistor R5, the connection circuit between the third resistor R4 and the fourth resistor R5 is electrically connected to the emitter of the first transistor Q1, the collector of the first transistor Q1 is electrically connected to the interrupt pin of the external single-chip microcomputer, the base of the first transistor Q1 is electrically connected to one end of the fifth resistor R6, the connection circuit between the first transistor Q1 and the fifth resistor R6 is electrically connected to the other end of the fourth resistor R5, and the other end of the fifth resistor R6 is grounded.

[0023] The utility model discloses a high voltage current detection circuit, including high voltage current detection resistance R1, filter capacitor C1, direct current cut-off capacitor C2, first resistance R2, second resistance R3, third resistance R4, fourth resistance R5, fifth resistance R6, triode one Q1 and triode two Q2, wherein high voltage current detection resistance R1 is connected between high voltage power supply and ground, filter capacitor C1 is connected between high voltage current detection resistance R1 and ground, direct current cut-off capacitor C2 is connected between high voltage current detection resistance R1 and ground, first resistance R2 is connected between high voltage current detection resistance R1 and triode one Q1, second resistance R3 is connected between triode one Q1 and triode two Q2, third resistance R4 is connected between triode one Q1 and ground, fourth resistance R5 is connected between triode two Q2 and ground, fifth resistance R6 is connected between triode two Q2 and ground, triode one Q1 and triode two Q2 are connected to the singlechip's interrupt pin.

[0024] The high voltage current detection resistance R1 is set to a resistance value of 20Ω-1000Ω, preferably a resistance value of 100Ω, and a resistance value error range of 1%.

[0025] The voltage-sensitive resistor RV1 is set to a voltage-sensitive voltage of not higher than 25V and a clamping voltage of not higher than 40V, preferably a type of 07D180K.

[0026] The filter capacitor C1 is set to a capacity of 1nF-1μF and a withstand voltage of not lower than 100V, preferably a capacity of 100nF and a withstand voltage of 100V.

[0027] The direct current cut-off capacitor C2 is set to a capacity of 0.1μF-10μF, preferably a capacity of 1μF.

[0028] The first resistance R2, the fourth resistance R5 and the fifth resistance R6 are set to a resistance value of 1kΩ.

[0029] The second resistance R3 and the third resistance R4 are set to a resistance value of 2.2kΩ.

[0030] The triode one Q1 and the triode two Q2 are arranged as NPN triodes, the collector breakdown voltage of which is higher than 25V, the collector current of which is higher than 500mA, the collector off current of which is lower than 100nA, and the saturation voltage of which is lower than 0.6V, and the preferred model is S8050-HQ.

[0031] The utility model uses, according to actual outside power supply power or electric field use situation selects the component model of appropriate element to carry out high voltage power supply ignition detection of different power size, and the scope of application is wide.

[0032] The above examples are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been explained in detail with reference to the foregoing examples, those skilled in the art should understand that: it still can modify the technical solutions recorded in the foregoing examples, or make equivalent replacement to part of the technical features; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A high efficiency low cost high voltage spark detection circuit, characterized by: The high-voltage current detection resistor (R1), the voltage-dependent resistor (RV1), the filter capacitor (C1), the direct-current blocking capacitor (C2), the first resistor (R2), the second resistor (R3), the third resistor (R4), the fourth resistor (R5), the fifth resistor (R6), the first transistor (Q1) and the second transistor (Q2) are included. The high-voltage current detection resistor (R1) is connected in series in the output circuit of the external high-voltage power supply, the high-voltage current detection resistor (R1), the voltage-dependent resistor (RV1) and the filter capacitor (C1) are connected in parallel, one end of the high-voltage current detection resistor (R1), the voltage-dependent resistor (RV1) and the filter capacitor (C1) is electrically connected to one end of the direct-current blocking capacitor (C2), the other end of the high-voltage current detection resistor (R1), the voltage-dependent resistor (RV1) and the filter capacitor (C1) is grounded, the other end of the direct-current blocking capacitor (C2) is electrically connected to one end of the third resistor (R4), the connection circuit between the direct-current blocking capacitor (C2) and the third resistor (R4) is electrically connected to one end of the second resistor (R3), the other end of the second resistor (R3) is electrically connected to the base of the second transistor (Q2), the connection circuit between the second resistor (R3) and the second transistor (Q2) is electrically connected to one end of the first resistor (R2), the other end of the first resistor (R2) and the emitter of the second transistor (Q2) are grounded, the collector of the second transistor (Q2) is electrically connected to the interrupt pin of the external single-chip microcomputer, the other end of the third resistor (R4) is electrically connected to one end of the fourth resistor (R5), the connection circuit between the third resistor (R4) and the fourth resistor (R5) is electrically connected to the emitter of the first transistor (Q1), the collector of the first transistor (Q1) is electrically connected to the interrupt pin of the external single-chip microcomputer, the base of the first transistor (Q1) is electrically connected to one end of the fifth resistor (R6), the connection circuit between the first transistor (Q1) and the fifth resistor (R6) is electrically connected to the other end of the fourth resistor (R5), and the other end of the fifth resistor (R6) is grounded.

2. The efficient low cost high voltage spark detection circuit of claim 1, wherein, The high-voltage current detection resistor (R1) is set to have a resistance of 20Ω-1000Ω.

3. The efficient low cost high voltage spark detection circuit of claim 1, wherein, The voltage-dependent resistor (RV1) is set to have a voltage-dependent voltage of not higher than 25V and a clamping voltage of not higher than 40V.

4. The efficient low cost high voltage spark detection circuit of claim 1, wherein, The filter capacitor (C1) is set to have a capacity of 1nF-1μF and a withstand voltage of not lower than 100V.

5. The efficient low cost high voltage spark detection circuit of claim 1, wherein, The direct-current blocking capacitor (C2) is set to have a capacity of 0.1μF-10μF.

6. The efficient low cost high voltage spark detection circuit of claim 1, wherein, The first resistor (R2), the fourth resistor (R5) and the fifth resistor (R6) are set to have a resistance of 1kΩ.

7. The efficient low cost high voltage spark detection circuit of claim 1, wherein, The second resistor (R3) and the third resistor (R4) are set to have a resistance of 2.2kΩ.

8. The efficient low cost high voltage spark detection circuit of claim 1, wherein, The first transistor (Q1) and the second transistor (Q2) are set to be NPN transistors, the collector breakdown voltage of which is higher than 25V, the collector current of which is higher than 500mA, the collector cutoff current of which is lower than 100nA, and the saturation voltage of which is lower than 0.6V.

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