CN219938201U - High-voltage automatic bleeder circuit - Google Patents
High-voltage automatic bleeder circuit Download PDFInfo
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- CN219938201U CN219938201U CN202321231543.5U CN202321231543U CN219938201U CN 219938201 U CN219938201 U CN 219938201U CN 202321231543 U CN202321231543 U CN 202321231543U CN 219938201 U CN219938201 U CN 219938201U
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- 239000003990 capacitor Substances 0.000 claims abstract description 140
- 238000007599 discharging Methods 0.000 claims abstract description 48
- 238000010521 absorption reaction Methods 0.000 claims description 17
- 230000000087 stabilizing effect Effects 0.000 claims description 6
- 230000000740 bleeding effect Effects 0.000 claims 4
- 230000000694 effects Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000012260 Accidental injury Diseases 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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Abstract
The utility model discloses a high-voltage automatic discharging circuit which comprises an RCD absorbing and collecting circuit, an automatic discharging and judging circuit and an MOS tube resistor discharging circuit, wherein the input end of the RCD absorbing and collecting circuit is connected with the secondary side of a transformer of a power supply, the output end of the RCD absorbing and collecting circuit is connected with the input end of the automatic discharging and judging circuit, the output end of the automatic discharging and judging circuit is connected with the input end of the MOS tube resistor discharging circuit, and the output end of the MOS tube resistor discharging circuit is connected with an external capacitor. The utility model has no pressure relief effect when the power supply works normally, does not consume energy, can perform the pressure relief effect only after the power supply is turned off, does not need to additionally add an isolated power supply or additionally supply power, does not need to be controlled by an external control signal, and greatly simplifies the circuit structure.
Description
Technical Field
The utility model relates to the technical field of power supplies, in particular to a high-voltage automatic bleeder circuit.
Background
In the design and application of the high-voltage power supply, due to the existence of the capacitor at the output end, a high voltage exists all the time after the power supply is turned off and output, and the existence of the high voltage can cause accidental injury to operators or damage to other electronic products, so that the high-voltage power supply is very dangerous. Therefore, in most cases, the high-voltage power supply on the market usually adopts a direct resistor series connection mode to discharge high voltage, and the main working principle is that the energy consumption of the resistor is utilized, and the energy stored in the output capacitor is rapidly consumed after the power supply is powered off. However, since the resistor is always mounted on the output terminal, energy consumption is always generated in the resistor. The efficiency of the power supply is reduced, and the discharge resistor is heated, so that the service life of the power supply is greatly shortened; and the traditional resistance relief device has huge volume due to various reasons such as power, heat dissipation and the like, and is difficult to meet the current high-density production requirements.
The above disadvantages are to be improved.
Disclosure of Invention
In order to solve the problems that the existing high-voltage bleeder technology reduces the power supply efficiency, can cause the bleeder resistor to generate heat, greatly shortens the service life, has huge volume and is difficult to adapt to the current densification, the utility model provides a high-voltage automatic bleeder circuit.
The technical scheme of the utility model is as follows:
the utility model provides a high-voltage automatic bleeder circuit, includes that RCD inhales and collects electric circuit, automatic judgement circuit, MOS pipe resistance discharge circuit that discharges, the RCD inhales and collects the input of electric circuit and is connected with the transformer secondary of power, the RCD absorbs and gets the output of electric circuit with automatic judgement circuit's input of discharging is connected, automatic judgement circuit's of discharging output with MOS pipe resistance discharge circuit's input, MOS pipe resistance discharge circuit's output is connected with external capacitance.
According to the high-voltage automatic discharging circuit, the RCD absorption power taking circuit comprises a diode D6, a capacitor C2, a resistor R8, a resistor R11, a resistor R12, a resistor R13, a resistor R14 and a voltage stabilizing diode DZ1, one end of the diode D6 is connected with the positive output end of the secondary side of the transformer, the other end of the diode D6 is respectively connected with one end of the capacitor C2, one end of the resistor R11 and one end of the resistor R12, one end of the resistor R13 and one end of the resistor R14, the other end of the resistor R8 is respectively connected with one end of the voltage stabilizing diode DZ1 and the input end of the automatic discharging judging circuit, and the other end of the capacitor C2, the other end of the resistor R13, the other end of the resistor R14 and the other end of the voltage stabilizing diode DZ1 are respectively connected with the negative output end of the secondary side of the transformer.
Further, the capacitor C2 is a nonpolar capacitor.
According to the high-voltage automatic discharging circuit, the automatic discharging judging circuit comprises a diode D9, a resistor R15, a resistor R16, a capacitor CE1 and a triode Q2, one end of the diode D9 is respectively connected with the output end of the RCD absorption power taking circuit, a reference voltage, one end of the resistor R15 and the b pole of the triode Q2, the other end of the diode D9 is respectively connected with the e pole of the triode Q2 and one end of the capacitor CE1, the c pole of the triode Q2 is respectively connected with one end of the resistor R16 and the input end of the MOS tube resistor discharging circuit, and the other end of the resistor R15, the other end of the resistor R16 and the other end of the capacitor CE1 are respectively connected with the negative electrode output end of the secondary side of the transformer.
Further, the capacitor CE1 is a capacitor with polarity.
Further, the transistor Q2 is a PNP transistor.
According to the high-voltage automatic discharging circuit, the MOS tube resistor discharging circuit comprises a resistor R1, a resistor R4, a resistor R7, a resistor R9, a resistor R10 and a MOS tube Q1, one end of the resistor R9 is connected with the output end of the automatic discharging judging circuit, the other end of the resistor R9 is respectively connected with one end of the resistor R10 and the G electrode of the MOS tube Q1, the D electrode of the MOS tube Q1 is sequentially connected with the positive electrode output end of the secondary side of the transformer after passing through the resistor R7, the resistor R4 and the resistor R1, and the other end of the resistor R10 and the S electrode of the MOS tube Q1 are both connected with the negative electrode output end of the secondary side of the transformer.
Further, the MOS transistor Q1 is an NMOS transistor.
According to the high-voltage automatic bleeder circuit of the scheme, the external capacitor comprises a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14 and a capacitor C15, one end of the capacitor C9, one end of the capacitor C10 and one end of the capacitor C11 are all connected with the positive output end of the secondary side of the transformer, the other end of the capacitor C9 is respectively connected with the other end of the capacitor C10, one end of the capacitor C12 and one end of the capacitor C13, the other end of the capacitor C12 is respectively connected with the other end of the capacitor C13, one end of the capacitor C14 and one end of the capacitor C15, and the other end of the capacitor C11, the other end of the capacitor C14 and the other end of the capacitor C15 are all connected with the negative output end of the secondary side of the transformer.
Further, the capacitor C10, the capacitor C12, the capacitor C13, the capacitor C14, and the capacitor C15 are all capacitors having a polarity, and the capacitor C11 is a capacitor having no polarity.
Compared with the prior art, the utility model has the beneficial effects that:
the high-voltage automatic discharging circuit provided by the utility model consists of the RCD absorption power taking circuit, the automatic discharging judging circuit and the MOS tube resistor discharging circuit, and does not play a role in pressure relief and consume energy when the power supply works normally, so that the power supply efficiency is not reduced, and the discharging resistor is not heated; only after the power supply is turned off, the pressure relief function is realized for quick discharge; because the RCD absorption circuit is used for energy conversion, an additional isolation power supply is not needed, additional power supply is not needed, and external control signals are not needed for control, so that the circuit structure is greatly simplified, the volume is reduced, and the current high-density production requirement is met.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a circuit diagram of a high voltage automatic bleeder circuit of the present utility model applied to a high voltage power supply;
FIG. 2 is a circuit diagram of an RCD absorption power take-off circuit in accordance with the present utility model;
FIG. 3 is a circuit diagram of an automatic discharge judgment circuit according to the present utility model;
FIG. 4 is a circuit diagram of a MOS transistor resistor discharge circuit according to the present utility model;
fig. 5 is a circuit diagram of an external capacitor according to the present utility model.
Description of the embodiments
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures. Meanwhile, it is stated that the embodiments described below are only for explaining the present utility model and are not intended to limit the present utility model.
It should be noted that terms such as "connected" should be interpreted broadly, for example, the terms may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise.
Referring to fig. 1 to 5, the present embodiment provides a high-voltage automatic discharging circuit, which is applied to a high-voltage power supply, wherein the high-voltage automatic discharging circuit 1 comprises an RCD power absorbing and collecting circuit, an automatic discharging and judging circuit and a MOS transistor resistor discharging circuit, an input end of the RCD power absorbing and collecting circuit is connected with a secondary side of a transformer of the high-voltage power supply, an output end of the RCD power absorbing and collecting circuit is connected with an input end of the automatic discharging and judging circuit, an output end of the automatic discharging and judging circuit is connected with an input end of the MOS transistor resistor discharging circuit, and an output end of the MOS transistor resistor discharging circuit is connected with an external capacitor 2. The RCD absorption power-taking circuit is used for charging when the power supply works normally and discharging when the power supply is closed; the automatic discharge judging circuit is used for judging the working state of the power supply according to the charge and discharge operation of the RCD absorption power-taking circuit and controlling the external capacitor 2 to perform discharge operation through the MOS tube resistor discharge circuit, so that the voltage at two ends of the external capacitor 2 is rapidly reduced, and the effect of rapid discharge is achieved.
Referring to fig. 2, specifically, the RCD absorption power-taking circuit includes a diode D6, a capacitor C2, a resistor R8, a resistor R11, a resistor R12, a resistor R13, a resistor R14, and a zener diode DZ1, wherein one end of the diode D6 is connected to an output end of the positive electrode of the secondary side of the transformer, the other end of the diode D6 is connected to one end of the capacitor C2, one end of the resistor R11, and one end of the resistor R12, one end of the resistor R8 is connected to the other end of the resistor R11, one end of the resistor R12, and one end of the resistor R14, the other end of the resistor R8 is connected to one end of the zener diode DZ1, and an input end of the automatic discharge determination circuit, and the other end of the capacitor C2, the other end of the resistor R13, the other end of the resistor R14, and the other end of the zener diode DZ1 are all connected to an output end of the negative electrode of the secondary side of the transformer. The capacitor C2 is a nonpolar capacitor. When the power supply works normally, the RCD absorption circuit composed of the diode D6, the capacitor C2, the resistor R11, the resistor R12, the resistor R13 and the resistor R14 charges, and the resistor R8 provides power for the voltage-stabilizing diode DZ1, so that additional power supply is not needed, and the circuit is simple and easy to use.
Referring to fig. 3, the automatic discharging determination circuit includes a diode D9, a resistor R15, a resistor R16, a capacitor CE1, and a triode Q2, wherein one end of the diode D9 is connected with the output end of the RCD absorption power supply circuit, a reference voltage, one end of the resistor R15, and the b pole of the triode Q2, the other end of the diode D9 is connected with the e pole of the triode Q2 and one end of the capacitor CE1, the c pole of the triode Q2 is connected with one end of the resistor R16 and the input end of the MOS resistor discharging circuit, and the other end of the resistor R15, the other end of the resistor R16, and the other end of the capacitor CE1 are connected with the negative electrode output end of the secondary side of the transformer. The capacitor CE1 is a capacitor with a polarity, the triode Q2 is a PNP triode, and the reference voltage is 15V. In the automatic discharging judgment circuit, when the power supply works normally, the RCD absorption power taking circuit charges the capacitor CE1 through the diode D9, so that the voltage of the capacitor CE1 is kept at about 15.5V. At this time, the voltage Vb of the b pole and the voltage Vc of the c pole of the triode Q2 are smaller than the conduction voltage drop, so that the triode Q2 is turned off and cannot output a control signal to the MOS transistor resistor discharge circuit; after the power supply is turned off, the RCD absorption power-taking circuit cannot continuously charge the capacitor CE1 through the diode D9, and at the moment, the triode Q2 is conducted due to the fact that the voltage Vb of the b pole is far smaller than the voltage Vc of the c pole, and a control signal is output to the MOS transistor resistor discharging circuit.
Referring to fig. 4, specifically, the MOS transistor resistor discharging circuit includes a resistor R1, a resistor R4, a resistor R7, a resistor R9, a resistor R10, and a MOS transistor Q1, wherein one end of the resistor R9 is connected to an output end of the automatic discharging determination circuit, the other end of the resistor R9 is connected to one end of the resistor R10 and a G pole of the MOS transistor Q1, a D pole of the MOS transistor Q1 is connected to an anode output end of a secondary side of the transformer after sequentially passing through the resistor R7, the resistor R4, and the resistor R1, and the other end of the resistor R10 and the S pole of the MOS transistor Q1 are connected to a cathode output end of the secondary side of the transformer. Wherein, MOS pipe Q1 is the NMOS pipe. The MOS tube resistor discharging circuit formed by the MOS tube resistor adding mode is in a cut-off state when a power supply works normally, and does not play a role in pressure relief; only after the power supply is turned off, the MOS tube is in a conducting state and can play a role in pressure relief for quick discharge.
Referring to fig. 5, specifically, the external capacitor 2 includes a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14, and a capacitor C15, wherein one end of the capacitor C9, one end of the capacitor C10, and one end of the capacitor C11 are all connected with the positive output end of the secondary side of the transformer, the other end of the capacitor C9 is respectively connected with the other end of the capacitor C10, one end of the capacitor C12, and one end of the capacitor C13, the other end of the capacitor C12 is respectively connected with the other end of the capacitor C13, one end of the capacitor C14, and one end of the capacitor C15, and the other end of the capacitor C11, the other end of the capacitor C14, and the other end of the capacitor C15 are all connected with the negative output end of the secondary side of the transformer. The capacitor C10, the capacitor C12, the capacitor C13, the capacitor C14, and the capacitor C15 are all capacitors with polarities, and the capacitor C11 is a capacitor without polarities.
Working principle:
when the power supply works normally, the RCD absorption circuit consisting of the diode D6, the capacitor C2, the resistor R11, the resistor R12, the resistor R13 and the resistor R14 is charged, the voltage-stabilizing diode DZ1 is supplied with power through the resistor R8, and then the capacitor CE1 is charged through the diode D9, so that the voltage of the capacitor CE1 is kept at about 15.5V. At this time, the voltage Vb of the b pole and the voltage Vc of the c pole are smaller than the on voltage drop, so that the transistor Q2 is turned off, and the MOS transistor Q1 is also turned off, and at this time, the external capacitor 2 is not discharged through the MOS transistor resistor discharge circuit.
When the power is turned off, the RCD snubber circuit composed of the diode D6, the capacitor C2, the resistor R11, the resistor R12, the resistor R13, and the resistor R14 cannot continuously supply power to the zener diode DZ1, so that the diode D9 is turned off. At this time, the voltage Vb of the b pole is far smaller than the voltage Vc of the c pole, so that the triode Q2 is turned on, the capacitor CE1 supplies power to the G pole of the MOS transistor Q1 through the triode Q2, so that the MOS transistor Q1 is turned on, and the external capacitor 2 discharges through the resistor of the MOS transistor resistor discharge circuit and the MOS transistor, so that the voltage at two ends of the external capacitor 2 drops rapidly, and a rapid discharge effect is achieved.
In summary, the high-voltage automatic bleeder circuit 1 provided by the embodiment is composed of an RCD absorption circuit, an automatic discharge judging circuit and an MOS tube resistor discharge circuit, and does not play a role in pressure relief and consume energy when a power supply works normally, so that the power supply efficiency is not reduced, and the bleeder resistor is not heated; only after the power supply is turned off, the pressure relief function is realized for quick discharge; because the RCD absorption circuit is used for energy conversion, an additional isolation power supply is not needed, additional power supply is not needed, and external control signals are not needed for control, so that the circuit structure is greatly simplified, the volume is reduced, and the current high-density production requirement is met.
It will be understood that modifications and variations will be apparent to those skilled in the art from the foregoing description, and it is intended that all such modifications and variations be included within the scope of the following claims.
While the utility model has been described above with reference to the accompanying drawings, it will be apparent that the implementation of the utility model is not limited by the above manner, and it is within the scope of the utility model to apply the inventive concept and technical solution to other situations as long as various improvements made by the inventive concept and technical solution are adopted, or without any improvement.
Claims (7)
1. The high-voltage automatic discharging circuit is characterized by comprising an RCD power sucking and collecting circuit, an automatic discharging and judging circuit and an MOS tube resistor discharging circuit, wherein the input end of the RCD power sucking and collecting circuit is connected with the secondary side of a transformer of a power supply, the output end of the RCD power sucking and taking circuit is connected with the input end of the automatic discharging and judging circuit, the output end of the automatic discharging and judging circuit is connected with the input end of the MOS tube resistor discharging circuit, and the output end of the MOS tube resistor discharging circuit is connected with an external capacitor;
the RCD absorption power taking circuit comprises a diode D6, a capacitor C2, a resistor R8, a resistor R11, a resistor R12, a resistor R13, a resistor R14 and a voltage stabilizing diode DZ1, wherein one end of the diode D6 is connected with the positive electrode output end of the secondary side of the transformer, the other end of the diode D6 is respectively connected with one end of the capacitor C2, one end of the resistor R11 and one end of the resistor R12, one end of the resistor R8 is respectively connected with the other end of the resistor R11, the other end of the resistor R12, one end of the resistor R13 and one end of the resistor R14, the other end of the resistor R8 is respectively connected with one end of the voltage stabilizing diode DZ1 and the input end of the automatic discharge judging circuit, and the other end of the capacitor C2, the other end of the resistor R13, the other end of the resistor R14 and the other end of the voltage stabilizing diode DZ1 are respectively connected with the negative electrode output end of the secondary side of the transformer;
the automatic discharge judging circuit comprises a diode D9, a resistor R15, a resistor R16, a capacitor CE1 and a triode Q2, wherein one end of the diode D9 is respectively connected with the output end of the RCD absorption power-taking circuit, a reference voltage, one end of the resistor R15 and the b pole of the triode Q2, the other end of the diode D9 is respectively connected with the e pole of the triode Q2 and one end of the capacitor CE1, the c pole of the triode Q2 is respectively connected with one end of the resistor R16 and the input end of the MOS resistor discharging circuit, and the other end of the resistor R15, the other end of the resistor R16 and the other end of the capacitor CE1 are all connected with the negative electrode output end of the secondary side of the transformer;
the MOS tube resistor discharging circuit comprises a resistor R1, a resistor R4, a resistor R7, a resistor R9, a resistor R10 and a MOS tube Q1, wherein one end of the resistor R9 is connected with the output end of the automatic discharging judging circuit, the other end of the resistor R9 is respectively connected with one end of the resistor R10 and the G electrode of the MOS tube Q1, the D electrode of the MOS tube Q1 is sequentially connected with the positive electrode output end of the secondary side of the transformer after passing through the resistor R7, the resistor R4 and the resistor R1, and the other end of the resistor R10 and the S electrode of the MOS tube Q1 are both connected with the negative electrode output end of the secondary side of the transformer.
2. The high voltage automatic bleeding circuit of claim 1, wherein the capacitor C2 is a non-polar capacitor.
3. The high voltage automatic bleeding circuit of claim 1, wherein the capacitor CE1 is a capacitor with polarity.
4. The high voltage automatic bleeding circuit of claim 1, wherein the transistor Q2 is a PNP transistor.
5. The high voltage automatic bleeding circuit of claim 1, wherein the MOS transistor Q1 is an NMOS transistor.
6. The automatic high-voltage discharging circuit according to claim 1, wherein the external capacitor comprises a capacitor C9, a capacitor C10, a capacitor C11, a capacitor C12, a capacitor C13, a capacitor C14 and a capacitor C15, one end of the capacitor C9, one end of the capacitor C10 and one end of the capacitor C11 are all connected with the positive output end of the secondary side of the transformer, the other end of the capacitor C9 is respectively connected with the other end of the capacitor C10, one end of the capacitor C12 and one end of the capacitor C13, the other end of the capacitor C12 is respectively connected with the other end of the capacitor C13, one end of the capacitor C14 and one end of the capacitor C15, and the other end of the capacitor C11, the other end of the capacitor C14 and the other end of the capacitor C15 are all connected with the negative output end of the secondary side of the transformer.
7. The automatic high voltage bleeder circuit according to claim 6, wherein the capacitor C10, the capacitor C12, the capacitor C13, the capacitor C14, and the capacitor C15 are all polar capacitors, and the capacitor C11 is a non-polar capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321231543.5U CN219938201U (en) | 2023-05-19 | 2023-05-19 | High-voltage automatic bleeder circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321231543.5U CN219938201U (en) | 2023-05-19 | 2023-05-19 | High-voltage automatic bleeder circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219938201U true CN219938201U (en) | 2023-10-31 |
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ID=88485963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321231543.5U Active CN219938201U (en) | 2023-05-19 | 2023-05-19 | High-voltage automatic bleeder circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219938201U (en) |
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2023
- 2023-05-19 CN CN202321231543.5U patent/CN219938201U/en active Active
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