Direct-current high-voltage driving circuit and electronic equipment

Abstract

The utility model discloses a direct current high voltage driving circuit and electronic equipment, the direct current high voltage driving circuit comprises a main controller, a rectification module, a detection module and a voltage release module, the input end of the rectification module is connected with a power supply; the detection module is respectively connected with the main controller and the output end of the rectification module, and is used for detecting a voltage signal output by the rectification module so as to enable the main controller to output a control signal; and the voltage release module is respectively connected with the output ends of the main controller and the rectification module, and is used for receiving a control signal output by the main controller so as to release the redundant voltage output by the rectification module. According to the utility model, the accumulated high-voltage electric energy can be released, so that the normal use of a user is prevented from being influenced by the overhigh voltage detected by the detection circuit, and the accumulated redundancy is prevented from breaking down a switch power device and other regional related devices.

Description

Technical Field

[0001] This utility model relates to the field of circuit technology, specifically to a DC high-voltage drive circuit and electronic equipment. Background Technology

[0002] Currently, many high-power chargers for mobile phones and laptops, induction cookers, and appliances such as washing machines, vacuum cleaners, hair dryers, and air purifiers driven by DC brushless motors require full-bridge rectification of the input AC power into DC power. At present, more than 95% of DC high-voltage drive circuits slowly dissipate the electrical energy stored in the circuit through resistive devices in the circuit system, which is extremely inefficient. In scenarios where users frequently turn the device on and off, the stored high-voltage energy is not released, causing the detection circuit to detect excessive voltage and shut down the device for protection, affecting normal use. Moreover, the stored high voltage can damage power devices such as switching MOSFETs or IGBTs, as well as other components in the regional circuit. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. Specifically, it addresses the issue that in scenarios involving frequent power-on and power-off use, accumulated high-voltage energy is not released, leading to the detection circuit detecting excessive voltage and triggering a protective shutdown, thus affecting normal user operation. Furthermore, the accumulated high voltage can damage power devices such as switching MOSFETs or IGBTs, as well as other components in the regional circuitry. Therefore, one objective of this utility model is to provide a DC high-voltage drive circuit, comprising:

[0004] Main controller;

[0005] A rectifier module, wherein the input terminal of the rectifier module is connected to a power supply;

[0006] The detection module is connected to the output terminals of the main controller and the rectifier module respectively, and is used to detect the voltage signal output by the rectifier module so that the main controller outputs a control signal;

[0007] A pressure relief module is connected to the output terminals of the main controller and the rectifier module, respectively, and is used to receive the control signal output by the main controller to release the redundant voltage output by the rectifier module.

[0008] Preferably, it further includes a switch module, which is connected to the main controller and is used to output a power on / off signal to the main controller.

[0009] Preferably, the pressure relief module includes a first resistor, a transistor, and a second resistor. One end of the first resistor is connected to the main controller, the base of the transistor is connected to the other end of the first resistor, the first end of the second resistor is connected to the collector of the transistor, and the second end of the second resistor is connected to the emitter of the transistor and grounded together.

[0010] Preferably, the pressure relief module includes a first resistor, an optocoupler, and a second resistor. The input terminal of the optocoupler is connected to the first resistor and the main controller, respectively. The first terminal of the second resistor is connected to the collector of the optocoupler, and the second terminal of the second resistor is connected to the emitter of the optocoupler and grounded together.

[0011] Preferably, the pressure relief module further includes a third resistor, a first end of the second resistor is connected to the collector of the transistor via the third resistor, the third resistor is connected to the collector of the transistor, and the other end of the third resistor is connected to the first end of the second resistor.

[0012] Preferably, the pressure relief module further includes a third resistor, with a first end of the second resistor connected to the collector of the optocoupler via the third resistor, one end of the third resistor connected to the collector of the optocoupler, and the other end of the third resistor connected to the first end of the second resistor.

[0013] Preferably, the pressure relief module further includes a fourth resistor and a field-effect transistor. One end of the fourth resistor is connected to the gate of the third resistor and the field-effect transistor, respectively, and the other end is connected to the output terminal of the rectifier module. The source of the field-effect transistor is connected to the output terminal of the rectifier module, and the drain of the field-effect transistor is connected to the first end of the second resistor.

[0014] Preferably, the first end of the first resistor is grounded, and the second end is connected to the negative terminal of the optocoupler.

[0015] Preferably, the second resistor is an adjustable resistor or a digital potentiometer.

[0016] Another objective of this invention is to provide an electronic device comprising the DC high-voltage drive circuit described above.

[0017] The above-described solution of this utility model has at least the following beneficial effects:

[0018] The DC high-voltage drive circuit provided by this utility model allows the DC high voltage output from the power input rectifier module to be detected by a detection module. When the detected DC high voltage is within the set safety value range, the main controller does not take any further action. When the detected DC high voltage is within the set safety value, the main controller can output a release control signal for redundant high voltage to the pressure relief module. After receiving the release control signal from the main controller, the pressure relief module starts to release the redundant high voltage. At the same time, the high voltage detection module can detect the DC high voltage. When the DC high voltage returns to below the safety value, it can feed back a signal to the main controller, causing the main controller to output a stop release control signal for redundant voltage. After receiving the stop release control signal for redundant high voltage, the high voltage relief module stops releasing the redundant high voltage. This allows the accumulated high voltage energy to be released, avoiding the detection circuit detecting excessively high voltage and affecting normal user operation, and preventing the accumulated redundancy from damaging the switching power devices and other related devices in the area.

[0019] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a structural block diagram of the DC high-voltage drive circuit provided in the embodiments of this utility model;

[0022] Figure 2 This is a circuit diagram of the pressure relief module provided in the embodiments of this utility model;

[0023] Figure 3 This is another circuit diagram of the pressure relief module provided in this embodiment of the present invention;

[0024] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "circumferential", "radial", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0030] The DC high-voltage drive circuit and electronic equipment of this utility model embodiment are described in detail below with reference to the accompanying drawings.

[0031] Reference Figure 1 As shown, the DC high-voltage drive circuit provided in this embodiment of the present invention includes: a main controller 10, a rectifier module 20, a detection module 30, and a voltage relief module 40. The input terminal of the rectifier module 20 is connected to a power supply. The detection module 30 is connected to the output terminals of the main controller 10 and the rectifier module 20 respectively, and is used to detect the voltage signal output by the rectifier module 20 so that the main controller 10 outputs a control signal. The voltage relief module 40 is connected to the output terminals of the main controller 10 and the rectifier module 20 respectively, and is used to receive the control signal output by the main controller 10 to release the redundant voltage output by the rectifier module 20.

[0032] The rectifier module 20 has an input voltage of 220V and an output voltage of 300-400V. Therefore, the input of the rectifier module 20 can be connected to an AC power supply, so that the output of the rectifier module 20 can output DC power after rectification. The AC power supply voltage is 220V, and the DC voltage output after rectification by the rectifier module 20 can be 300-400V. The output of the rectifier module 20 includes a bus, and the detection module 30 and the voltage relief module 40 can both be connected to the bus.

[0033] The DC high-voltage drive circuit provided by this utility model allows the DC high voltage output from the power input rectifier module 20 to be detected by the detection module 30. When the detected DC high voltage is within the set safety value range, the main controller 10 does not take any further action. When the detected DC high voltage is within the set safety value, the main controller 10 can output a redundant high voltage release control signal to the pressure relief module 40. After receiving the redundant high voltage release control signal from the main controller 10, the pressure relief module 40 starts to release the redundant high voltage. At the same time, the high voltage detection module 30 can detect the DC high voltage. When the DC high voltage returns to below the safety value, it can feed back a signal to the main controller 10, causing the main controller 10 to output a redundant voltage stop release control signal. After receiving the redundant high voltage stop release control signal, the high voltage relief module 40 stops releasing the redundant high voltage. This allows the accumulated redundant high voltage energy to be released, avoiding the detection circuit from detecting excessively high voltage and affecting normal user operation, and preventing the accumulated redundancy from damaging the switching power devices and other related devices in the area.

[0034] Specifically, it also includes a switch module 50, which is connected to the main controller 10 and is used to output a power-on / off signal to the main controller 10. When the switch module 50 receives a power-off signal, it can send a shutdown signal to the main controller 10, causing the main controller 10 to control the detection module 30 to detect the DC high voltage upon receiving the power-off signal.

[0035] Reference Figure 2 As shown, the pressure relief module 40 includes a first resistor R1, a transistor Q1, and a second resistor R4. One end of the first resistor R1 is connected to the main controller 10, the base of the transistor Q1 is connected to the other end of the first resistor R1, the first end of the second resistor R4 is connected to the collector of the transistor Q1, and the second end of the second resistor R4 is connected to the emitter of the transistor Q1.

[0036] Specifically, when the main controller 10 outputs a low-level signal, transistor Q1 is in a non-conducting state; when the main controller 10 outputs a high-level signal, transistor Q1 is in a conducting state to begin releasing redundant high voltage.

[0037] Reference Figure 3 As shown, as an optional embodiment, the pressure relief module 40 includes a first resistor R1, an optocoupler, and a second resistor R4. The input terminal of the optocoupler U2 is connected to the first resistor R1 and the main controller 10, respectively. The first terminal of the second resistor R4 is connected to the collector of the optocoupler U2, and the second terminal of the second resistor R4 is connected to the emitter of the optocoupler U2 and is grounded together.

[0038] In this embodiment, transistor Q1 can be replaced with optocoupler U2, so that the positive terminal of optocoupler U2 is connected to the main controller 10, the negative terminal of optocoupler U2 is connected to the first resistor R1, and the emitter of optocoupler U2 can be connected to the second resistor R4, and the collector can be connected to the third resistor R2, thereby achieving effective isolation between the input and output circuits.

[0039] Furthermore, the pressure relief module 40 also includes a third resistor R2. The first end of the second resistor R4 is connected to the collector of the transistor Q1 via the third resistor R2. The third resistor R2 is connected to the collector of the transistor Q1. The third resistor R2 limits the current and voltage, thereby protecting the transistor Q1 and the main controller 10 from being damaged.

[0040] It is understandable that when the transistor Q1 is replaced with optocoupler U2, the voltage relief module 40 also includes a third resistor. The first end of the second resistor R4 is connected to the collector of optocoupler U2 via the third resistor R2. One end of the third resistor R2 is connected to the collector of optocoupler U2, and the other end of the third resistor R2 is connected to the first end of the second resistor R4. This can protect optocoupler U2 and main controller 10 from being damaged.

[0041] Furthermore, the pressure relief module 40 also includes a fourth resistor R3 and a field-effect transistor Q2. One end of the fourth resistor R3 is connected to the gate of the third resistor R2 and the field-effect transistor Q2, respectively, and the other end is connected to the output terminal of the rectifier module 20. The drain of the field-effect transistor Q2 is connected to the output terminal of the rectifier module 20, and the drain of the field-effect transistor Q2 is connected to the first end of the second resistor R4. The field-effect transistor Q2 can be a PMOS transistor (Positive channel Metal Oxide Semiconductor), thereby enabling rapid release of high voltage and high current.

[0042] In this embodiment, when the detection module 30 detects that the DC voltage is within the normal range, the main controller 10 outputs a low-level signal to prevent the transistor Q1 and the field-effect transistor Q2 from conducting. When the high-voltage detection module 30 detects that the bus voltage is out of range, the main controller 10 outputs a high-level signal, which can pull down the gate voltage of the field-effect transistor Q2 to turn on the field-effect transistor Q2, thereby releasing the high voltage.

[0043] Preferably, the second resistor R4 is an adjustable resistor or a digital potentiometer. When the main controller 10 calculates the difference between the voltage detected by the detection module 30 and the standard voltage (e.g., 220V), it can calculate the corresponding resistance value of the second resistor R4 based on this difference. This allows the main controller 10 to send an adjustment signal to the second resistor R4, causing it to adjust its resistance accordingly to adapt to changes in standard voltages in different countries or regions.

[0044] The electronic device provided in the embodiments of this utility model includes the DC high-voltage drive circuit as described above. This electronic device can be a high-power charger, or an appliance such as a washing machine, vacuum cleaner, hair dryer, or air purifier. It can release the DC voltage during the shutdown process using the aforementioned DC high-voltage drive circuit. Therefore, the DC high voltage output after the power input rectifier module 20 is detected by the detection module 30. When the detected DC high voltage is within the set safety value range, the main controller 10 does not take further action. When the detected DC high voltage is within the set safety value, the main controller 10 can output a redundant high voltage release control signal to the pressure relief module 40, so that the pressure relief module 40 receives a signal from the main controller 10. After the output of the redundant high voltage release control signal, the redundant high voltage begins to be released. At the same time, the high voltage detection module 30 can detect the DC high voltage. When the DC high voltage returns to below the safe value, it can feed back a signal to the main controller 10, causing the main controller 10 to output a stop release control signal for the redundant voltage. After the high voltage release module 40 receives the stop release control signal for the redundant high voltage, it stops releasing the redundant high voltage. This allows the accumulated high voltage energy to be released, avoiding the detection circuit from detecting excessively high voltage and affecting normal use by the user, and preventing the accumulated redundancy from damaging the switching power devices and other related devices in the area.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A DC high-voltage drive circuit, characterized in that, include: Main controller; A rectifier module, wherein the input terminal of the rectifier module is connected to a power supply; The detection module is connected to the output terminals of the main controller and the rectifier module respectively, and is used to detect the voltage signal output by the rectifier module so that the main controller outputs a control signal; A pressure relief module is connected to the output terminals of the main controller and the rectifier module, respectively, and is used to receive the control signal output by the main controller to release the redundant voltage output by the rectifier module.

2. The DC high-voltage drive circuit according to claim 1, characterized in that, It also includes a switch module, which is connected to the main controller and is used to output a power on / off signal to the main controller.

3. The DC high-voltage drive circuit according to claim 1, characterized in that, The pressure relief module includes a first resistor, a transistor, and a second resistor. One end of the first resistor is connected to the main controller, the base of the transistor is connected to the other end of the first resistor, the first end of the second resistor is connected to the collector of the transistor, and the second end of the second resistor is connected to the emitter of the transistor and both are grounded.

4. The DC high-voltage drive circuit according to claim 1, characterized in that, The pressure relief module includes a first resistor, an optocoupler, and a second resistor. The input terminal of the optocoupler is connected to the first resistor and the main controller, respectively. The first terminal of the second resistor is connected to the collector of the optocoupler, and the second terminal of the second resistor is connected to the emitter of the optocoupler and grounded together.

5. The DC high-voltage drive circuit according to claim 3, characterized in that, The pressure relief module further includes a third resistor, with the first end of the second resistor connected to the collector of the transistor via the third resistor, one end of the third resistor connected to the collector of the transistor, and the other end of the third resistor connected to the first end of the second resistor.

6. The DC high-voltage drive circuit according to claim 4, characterized in that, The pressure relief module further includes a third resistor, with the first end of the second resistor connected to the collector of the optocoupler via the third resistor, one end of the third resistor connected to the collector of the optocoupler, and the other end of the third resistor connected to the first end of the second resistor.

7. The DC high-voltage drive circuit according to claim 5 or 6, characterized in that, The pressure relief module further includes a fourth resistor and a field-effect transistor. One end of the fourth resistor is connected to the gate of the third resistor and the field-effect transistor, respectively, and the other end is connected to the output terminal of the rectifier module. The source of the field-effect transistor is connected to the output terminal of the rectifier module, and the drain of the field-effect transistor is connected to the first end of the second resistor.

8. The DC high-voltage drive circuit according to claim 4, characterized in that, The first end of the first resistor is grounded, and the second end is connected to the negative terminal of the optocoupler.

9. The DC high-voltage drive circuit according to claim 3, characterized in that, The second resistor is an adjustable resistor or a digital potentiometer.

10. An electronic device, characterized in that, Includes the DC high-voltage drive circuit as described in any one of claims 1 to 9.

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