Voltage suppression protection circuit and electronic equipment

Abstract

The utility model provides a voltage suppression protection circuit and electronic equipment. The first oscillation absorption module and the second oscillation absorption module respectively generate a clamping suppression voltage, and the clamping suppression voltages are adopted to suppress the oscillation voltage of the power supply, so that the influence of the power supply oscillation of industrial equipment on household appliances is effectively suppressed, and the problem that when the household appliances use a power supply filtering structure of an existing scheme, the power supply filtering structure is inconvenient to use is solved. And when an industrial equipment power supply is provided, the household electrical appliance cannot work normally, and even the household electrical appliance is damaged.

Description

Technical Field

[0001] This application relates to the field of voltage suppression protection circuit technology, and more specifically, to a voltage suppression protection circuit and an electronic device. Background Technology

[0002] In industrial applications, the power supply environment is complex, with increased harmonic content, and even potential "dropouts." When control boards for appliances such as air conditioners use this type of power supply, the filtering components on the control board may oscillate, generating "high voltage," causing the appliances to malfunction or even be damaged. In complex and harsh industrial environments, household appliances frequently fail to function or even burn out.

[0003] This means that when household appliances use existing power filtering structures, they may not function properly or may even be damaged when powered by industrial equipment. Utility Model Content

[0004] The main objective of this application is to provide a voltage suppression protection circuit and electronic device to at least solve the problem that household appliances using existing power filtering structures cannot work properly or may even be damaged when powered by industrial equipment.

[0005] To achieve the above objectives, according to one aspect of this application, a voltage suppression protection circuit is provided, comprising:

[0006] A filter module is used to filter the oscillating voltage of the power supply input to the filter module;

[0007] Two oscillation absorption modules, namely a first oscillation absorption module and a second oscillation absorption module, are provided. The first oscillation absorption module is electrically connected between the positive input terminal and the positive output terminal of the filter module, and the second oscillation absorption module is electrically connected between the negative input terminal and the negative output terminal of the filter module. The first oscillation absorption module and the second oscillation absorption module are used to generate a clamping suppression voltage, and the clamping suppression voltage is used to suppress the oscillation voltage of the power supply.

[0008] Optionally, the first oscillation absorption module includes: a first diode, the negative terminal of which is electrically connected to the positive output terminal of the filter module; and a first voltage limiting module, the first terminal of which is electrically connected to the positive input terminal of the filter module, and the second terminal of which is electrically connected to the positive terminal of the first diode, wherein the first diode is used to generate a first clamping suppression voltage, the first clamping suppression voltage being the sum of the forward conduction voltage of the first diode and the voltage division of the first voltage limiting module.

[0009] Optionally, the first oscillation absorption module further includes: a first Zener diode, the first Zener diode being electrically connected between the negative terminal of the first diode and the positive output terminal of the filter module, and the first clamping suppression voltage being the sum of the forward conduction voltage of the first diode, the clamping voltage of the first Zener diode, and the voltage division of the first voltage limiting module.

[0010] Optionally, the first voltage limiting module includes multiple first resistors connected in parallel or in series.

[0011] Optionally, the first oscillation absorption module further includes a first magnetic bead, which is electrically connected between the positive input terminal of the filter module and the first terminal of the first voltage limiting module, and the first magnetic bead serves as an auxiliary filter.

[0012] Optionally, the second oscillation absorption module includes: a second diode, the negative terminal of which is electrically connected to the negative output terminal of the filter module; and a second voltage limiting module, the second terminal of which is electrically connected to the negative output terminal of the power supply and the negative input terminal of the filter module, respectively, and the second terminal of which is electrically connected to the positive terminal of the second diode. The second diode is used to generate a second clamping suppression voltage, which is the sum of the forward conduction voltage of the second diode and the voltage division of the second voltage limiting module.

[0013] Optionally, the second oscillation absorption module further includes: a second Zener diode, which is electrically connected between the negative terminal of the second diode and the negative output terminal of the filter module, and the second clamping suppression voltage is the sum of the forward conduction voltage of the second diode, the clamping voltage of the second Zener diode, and the voltage division of the second voltage limiting module.

[0014] Optionally, the second oscillation absorption module further includes a second magnetic bead, which is electrically connected between the negative input terminal of the filter module and the second terminal of the second voltage limiting module, and the second magnetic bead serves as an auxiliary filter.

[0015] Optionally, the filtering module includes: a first capacitor module, a second capacitor module, and a common-mode inductor. The first capacitor module is electrically connected between the positive input terminal and the negative input terminal of the common-mode inductor. The second capacitor module is electrically connected between the positive output terminal and the negative output terminal of the common-mode inductor. The first oscillation absorption module is electrically connected between the positive input terminal and the positive output terminal of the common-mode inductor. The second oscillation absorption module is electrically connected between the negative input terminal and the negative output terminal of the common-mode inductor.

[0016] According to another aspect of this application, an electronic device is provided, comprising: any of the voltage suppression protection circuits described above.

[0017] By applying the technical solution of this application, a clamping suppression voltage is generated by the first oscillation absorption module and the second oscillation absorption module respectively, and the clamping suppression voltage is used to suppress the oscillation voltage of the power supply, thereby effectively suppressing the impact of power supply oscillation of industrial equipment on home appliances. This solves the problem that when home appliances use the power filtering structure of the existing solution, they cannot work normally or even become damaged when working with the power supply of industrial equipment. Attached Figure Description

[0018] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0019] Figure 1 A first schematic diagram of a voltage suppression protection circuit according to an embodiment of this application is shown;

[0020] Figure 2 A second schematic diagram of a voltage suppression protection circuit according to an embodiment of this application is shown;

[0021] Figure 3 A schematic diagram of mains waveform variation with interference is shown according to an embodiment of this application.

[0022] The above figures include the following reference numerals:

[0023] 100. Filtering module; 200. First oscillation absorption module; 300. Second oscillation absorption module. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] For ease of description, the following explains some of the nouns or terms used in the embodiments of this application:

[0028] An LC oscillator is a circuit based on inductors and capacitors used to generate a stable sinusoidal signal. In an LC oscillator circuit, the inductor and capacitor interact to form a closed loop, generating oscillations through periodic energy exchange. LC oscillator circuits are commonly used in electronic devices such as radio tuners and radio frequency signal generators.

[0029] As described in the background section, industrial applications often involve complex power supply environments with increased harmonic content, and even voltage drops. When control boards for appliances such as air conditioners use such power supplies, the filtering components on the control board can oscillate, generating high voltage that can cause the appliances to malfunction or even be damaged. In complex and harsh industrial environments, household appliances frequently fail to function or even burn out. To address the problem that existing power filtering structures are often used in household appliances, whose power output is significantly lower than that of industrial equipment, they are insufficient to suppress power supply oscillations in industrial equipment, leading to malfunctions or even equipment damage, embodiments of this application provide a voltage suppression protection circuit and electronic device.

[0030] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0031] This application provides a voltage suppression protection circuit, such as Figure 1 As shown, the voltage suppression protection circuit includes:

[0032] The filter module 100 is used to filter the oscillation voltage of the power supply input to the filter module;

[0033] Two oscillation absorption modules, namely a first oscillation absorption module 200 and a second oscillation absorption module 300, are provided. The first oscillation absorption module is electrically connected between the positive input terminal and the positive output terminal of the filter module, and the second oscillation absorption module is electrically connected between the negative input terminal and the negative output terminal of the filter module. The first oscillation absorption module and the second oscillation absorption module are used to generate a clamping suppression voltage, and the clamping suppression voltage is used to suppress the oscillation voltage of the power supply.

[0034] The voltage suppression protection circuit described above generates a clamping suppression voltage through the first oscillation absorption module and the second oscillation absorption module, and uses the clamping suppression voltage to suppress the oscillation voltage of the power supply, thereby effectively suppressing the impact of power supply oscillation of industrial equipment on home appliances. This solves the problem that when home appliances use the existing power filtering structure, they cannot work properly or may even be damaged when there is power supply from industrial equipment.

[0035] In one embodiment of this application, such as Figure 2 As shown, the first oscillation absorption module 200 includes: a first diode D1, the negative terminal of which is electrically connected to the positive output terminal of the filter module; and a first voltage limiting module R1, the first terminal of which is electrically connected to the positive input terminal of the filter module, and the second terminal of which is electrically connected to the positive terminal of the first diode. The first diode is used to generate a first clamping suppression voltage, which is the sum of the forward conduction voltage of the first diode and the voltage division of the first voltage limiting module.

[0036] A first oscillation absorption module is set at both ends of the inductor to suppress the peak values ​​of LC oscillation, thereby controlling the voltage of the subsequent stage and avoiding high voltage. F1 is the first ferrite bead, and D2 is the first Zener diode. The ferrite bead and Zener diode are selected to optimize terminal interference voltage and power, and can be chosen based on test results. R1 is a resistor that limits the peak current flowing through D1 and can be selected based on D1's device parameters. D1 is a key component; its single-phase conduction characteristic clamps the voltage spikes generated when the power supply drops across the inductor. The clamping voltage of D1 is the sum of the voltage divider on the first voltage limiting module R1, the forward conduction voltage of D1, and the clamping voltage of D2. In practical applications, the selection can be considered based on the downstream test voltage.

[0037] In one embodiment of this application, such as Figure 2As shown, the first oscillation absorption module 200 further includes: a first Zener diode D2, which is electrically connected between the negative terminal of the first diode and the positive output terminal of the filter module, and the first clamping suppression voltage is the sum of the forward conduction voltage of the first diode, the clamping voltage of the first Zener diode, and the voltage division of the first voltage limiting module.

[0038] In one embodiment of this application, the first voltage limiting module includes a plurality of first resistors connected in parallel or in series.

[0039] In one embodiment of this application, such as Figure 2 As shown, the first oscillation absorption module further includes a first magnetic bead F1, which is electrically connected between the positive input terminal of the filter module and the first terminal of the first voltage limiting module. The first magnetic bead serves as an auxiliary filter.

[0040] In one embodiment of this application, such as Figure 2 As shown, the second oscillation absorption module 300 includes: a second diode D3, the negative terminal of which is electrically connected to the negative output terminal of the filter module; and a second voltage limiting module R2, the second terminal of which is electrically connected to the negative output terminal of the power supply and the negative input terminal of the filter module, respectively, and the second terminal of which is electrically connected to the positive terminal of the second diode. The second diode is used to generate a second clamping suppression voltage, which is the sum of the forward conduction voltage of the second diode and the voltage division of the second voltage limiting module.

[0041] In one embodiment of this application, such as Figure 2 As shown, the second oscillation absorption module 300 further includes: a second Zener diode D4, which is electrically connected between the negative terminal of the second diode and the negative output terminal of the filter module; the second clamping suppression voltage is the sum of the forward conduction voltage of the second diode, the clamping voltage of the second Zener diode, and the voltage division of the second voltage limiting module.

[0042] Specifically, similar to the first oscillation absorption module, the clamping voltage of D3 is the sum of the voltage divider on the second voltage limiting module R2, the forward conduction voltage of D3, and the clamping voltage of D4.

[0043] In one embodiment of this application, such as Figure 2 As shown, the second oscillation absorption module 300 further includes a second magnetic bead F2, which is electrically connected between the negative input terminal of the filter module and the second terminal of the second voltage limiting module. The second magnetic bead serves as an auxiliary filter.

[0044] By setting a second ferrite bead, auxiliary filtering can be provided for the filtering module.

[0045] In one embodiment of this application, such as Figure 2 As shown, the filter module 100 includes: a first capacitor module C1, a second capacitor module C2, and a common-mode inductor L. The first capacitor module is electrically connected between the positive input terminal and the negative input terminal of the common-mode inductor, the second capacitor module is electrically connected between the positive output terminal and the negative output terminal of the common-mode inductor, the first oscillation absorption module is electrically connected between the positive input terminal and the positive output terminal of the common-mode inductor, and the second oscillation absorption module is electrically connected between the negative input terminal and the negative output terminal of the common-mode inductor.

[0046] Specifically, by setting up a first capacitor module C1, a second capacitor module C2, and a common-mode inductor L, electromagnetic interference is reduced: the common-mode inductor can filter out common-mode interference signals, effectively reducing electromagnetic interference in the system; system stability is improved: the filtering components can effectively filter out noise signals, improving the signal quality of the system, and enhancing the stability and reliability of the system; system performance is improved: the filtering components can effectively filter out clutter signals, improving the system's anti-interference capability and performance; and the system's anti-interference capability is enhanced: the filtering components can effectively filter out interference signals, improving the system's anti-interference capability and making the system more stable and reliable.

[0047] According to another aspect of this application, an electronic device is provided, comprising: any one of the voltage suppression protection circuits described above. A clamping suppression voltage is generated by the first oscillation absorption module and the second oscillation absorption module respectively, and the clamping suppression voltage is used to suppress the oscillation voltage of the power supply, thereby effectively suppressing the impact of power supply oscillations from industrial equipment on household appliances. This solves the problem that when household appliances use existing power filtering structures and operate under industrial equipment power, the appliances may malfunction or even be damaged.

[0048] The most typical interference is as follows Figure 3 As shown, normal mains power is a smooth sine wave, but when high-power industrial equipment operates, it causes a short-term voltage drop in the power supply to nearby household appliances. Figure 3 When the mains power supply experiences a short-term voltage drop, the presence of inductors and capacitors causes oscillations in the LC circuit due to the short-term voltage drop, resulting in an abnormal peak voltage higher than the normal voltage. Figure 3 The oscillation spikes in the power supply. Due to the long-term cyclical operation of industrial equipment, voltage drops occur in almost every sine wave cycle. These power drops cause spike oscillations, which accumulate cycle by cycle, eventually leading to excessive voltage after rectification in the subsequent stage. This ultimately causes the electrical equipment to malfunction or even be damaged.

[0049] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0050] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0051] 1) The voltage suppression protection circuit of this application generates a clamping suppression voltage through the first oscillation absorption module and the second oscillation absorption module respectively, and uses the clamping suppression voltage to suppress the oscillation voltage of the power supply, thereby effectively suppressing the impact of power supply oscillation of industrial equipment on home appliances. This solves the problem that when home appliances use the power filtering structure of the existing solution, they cannot work normally or even become damaged when there is power supply from industrial equipment.

[0052] 2) The electronic device of this application generates a clamping suppression voltage through the first oscillation absorption module and the second oscillation absorption module respectively, and uses the clamping suppression voltage to suppress the oscillation voltage of the power supply, thereby effectively suppressing the impact of power supply oscillation of industrial equipment on home appliances. This solves the problem that when home appliances use the power filtering structure of the existing solution, they cannot work normally or even become damaged when they are powered by industrial equipment.

[0053] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A voltage suppression protection circuit, characterized in that, include: A filter module is used to filter the oscillating voltage of the power supply input to the filter module; Two oscillation absorption modules, namely a first oscillation absorption module and a second oscillation absorption module, are provided. The first oscillation absorption module is electrically connected between the positive input terminal and the positive output terminal of the filter module, and the second oscillation absorption module is electrically connected between the negative input terminal and the negative output terminal of the filter module. The first oscillation absorption module and the second oscillation absorption module are used to generate a clamping suppression voltage, and the clamping suppression voltage is used to suppress the oscillation voltage of the power supply.

2. The voltage suppression protection circuit according to claim 1, characterized in that, The first oscillation absorption module includes: The first diode, the negative terminal of which is electrically connected to the positive output terminal of the filter module; The first voltage limiting module has a first terminal electrically connected to the positive input terminal of the filter module and a second terminal electrically connected to the positive terminal of the first diode. The first diode is used to generate a first clamping suppression voltage, which is the sum of the forward conduction voltage of the first diode and the voltage division of the first voltage limiting module.

3. The voltage suppression protection circuit according to claim 2, characterized in that, The first oscillation absorption module further includes: The first Zener diode is electrically connected between the negative terminal of the first diode and the positive output terminal of the filter module. The first clamping suppression voltage is the sum of the forward conduction voltage of the first diode, the clamping voltage of the first Zener diode, and the voltage division of the first voltage limiting module.

4. The voltage suppression protection circuit according to claim 2, characterized in that, The first voltage limiting module includes multiple first resistors connected in parallel or in series.

5. The voltage suppression protection circuit according to claim 2, characterized in that, The first oscillation absorption module further includes a first magnetic bead, which is electrically connected between the positive input terminal of the filter module and the first terminal of the first voltage limiting module. The first magnetic bead serves as an auxiliary filter.

6. The voltage suppression protection circuit according to claim 1, characterized in that, The second oscillation absorption module includes: The second diode, the negative terminal of which is electrically connected to the negative output terminal of the filter module; The second voltage limiting module has its second terminal electrically connected to the negative output terminal of the power supply and the negative input terminal of the filter module, respectively. The second terminal of the second voltage limiting module is electrically connected to the positive terminal of the second diode. The second diode is used to generate a second clamping suppression voltage, which is the sum of the forward conduction voltage of the second diode and the voltage division of the second voltage limiting module.

7. The voltage suppression protection circuit according to claim 6, characterized in that, The second oscillation absorption module also includes: The second Zener diode is electrically connected between the negative terminal of the second diode and the negative output terminal of the filter module. The second clamping suppression voltage is the sum of the forward conduction voltage of the second diode, the clamping voltage of the second Zener diode, and the voltage division of the second voltage limiting module.

8. The voltage suppression protection circuit according to claim 6, characterized in that, The second oscillation absorption module further includes a second magnetic bead, which is electrically connected between the negative input terminal of the filter module and the second terminal of the second voltage limiting module. The second magnetic bead serves as an auxiliary filter.

9. The voltage suppression protection circuit according to any one of claims 1 to 8, characterized in that, The filtering module includes: a first capacitor module, a second capacitor module, and a common-mode inductor. The first capacitor module is electrically connected between the positive input terminal and the negative input terminal of the common-mode inductor. The second capacitor module is electrically connected between the positive output terminal and the negative output terminal of the common-mode inductor. The first oscillation absorption module is electrically connected between the positive input terminal and the positive output terminal of the common-mode inductor. The second oscillation absorption module is electrically connected between the negative input terminal and the negative output terminal of the common-mode inductor.

10. An electronic device, characterized in that, include: The voltage suppression protection circuit according to any one of claims 1 to 9.

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