Lightning protection multi-port charger circuit
By introducing a combined circuit of fuse F1, varistor RV1, discharge tube F2 and voltage regulator D2 into the charger, the existing lightning protection charger has solved the problem of high current hazards and lack of lightning strike indications in thunderstorms, achieving better lightning protection effects and timely lightning strike prompts.
Patent Information
- Application Number
- CN202422244374.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-12
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-09-12
AI Technical Summary
The existing lightning-proof chargers have high current risks and lack the lightning strike indication function in severe thunderstorms.
A lightning protection circuit consisting of fuse F1, varistor RV1, discharge tube F2, diode D1 and voltage regulator D2 is used to initially reduce the surge voltage through the varistor, the discharge tube absorbs excess current, and the voltage regulator breaks down and grounds when it strikes lightning to resolve the hidden dangers of large current, and power is supplied to the indicator light to indicate the lightning strike status.
It improves lightning protection effect and can prompt users in time when lightning strikes, reducing the risk of large currents.
Smart Images
Figure CN223156749U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lightning protection circuits, in particular to a lightning protection multi-port charger circuit. Background Art
[0002] Existing lightning protection chargers generally only have varistors to play a role in preventing surges. Although varistors can reduce the surge voltage, there are still hidden dangers of large currents in some severe thunderstorm weather, and the lightning protection effect is average; moreover, existing lightning protection chargers do not have a lightning strike indication function, which is not convenient for use. Summary of the Utility Model
[0003] The purpose of the utility model is to at least solve one of the technical problems existing in the prior art, and provide a lightning protection multi-port charger circuit with a lightning strike indication function and better lightning protection effect.
[0004] The lightning protection multi-port charger circuit according to an embodiment of the utility model includes a lightning protection circuit, and the lightning protection circuit includes a fuse F1, a varistor RV1, a discharge tube F2, a diode D1, a voltage regulator tube D2, a resistor R1, a resistor R2, a resistor R3 and an indicator lamp LED1. The N line of the commercial power is electrically connected to one end of the fuse F1 and one end of the resistor R2 respectively. The other end of the fuse F1 is electrically connected to one end of the varistor RV1. The other end of the varistor RV1 is electrically connected to one end of the discharge tube F2. The L line of the commercial power is electrically connected to the other end of the discharge tube F2 and the anode of the diode D1 respectively. The cathode of the diode D1 is electrically connected to the cathode of the voltage regulator tube D2 through the series-connected resistor R1. The anode of the voltage regulator tube D2 is electrically connected to the other end of the resistor R2 and one end of the indicator lamp LED1 respectively. The other end of the indicator lamp LED1 is grounded.
[0005] The lightning protection multi-port charger circuit according to an embodiment of the utility model has at least the following beneficial effects: for AC input, when the lightning strike surge voltage is too high, the surge voltage can be initially reduced through the absorption of the varistor RV1. At the same time, the discharge tube F2 absorbs the excess current. When lightning strikes, the voltage regulator tube D2 is broken down, and the current is connected to the ground wire to eliminate the hidden danger of large current, and the lightning protection effect is better; at the same time, the diode D1 plays a rectifying role to supply power to the indicator lamp LED1. The breakdown of the voltage regulator tube D2 causes the voltage to be fed to the indicator lamp LED1, and the indicator lamp LED1 lights up to indicate the lightning strike state, which is convenient for users to observe.
[0006] The additional aspects and advantages of the utility model will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the utility model. Description of the Drawings
[0007] The following further describes the specific embodiments of the utility model with reference to the drawings;
[0008] Figure 1 It is the schematic diagram of the lightning protection multi-port charger circuit. Specific implementation manners
[0009] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The function of the drawings is to supplement the description of the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.
[0010] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.
[0011] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more. Understand greater than, less than, exceeding, etc. as not including the present number, and understand above, below, within, etc. as including the present number. If the first and second are described, it is only for the purpose of distinguishing technical features and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.
[0012] Refer to Figure 1, a lightning protection multi-port charger circuit of the present utility model includes a lightning protection circuit 10. The lightning protection circuit 10 includes a fuse F1, a varistor RV1, a discharge tube F2, a diode D1, a zener diode D2, a resistor R1, a resistor R2, a resistor R3, and an indicator light LED1. The municipal power N wire is electrically connected to one end of the fuse F1 and one end of the resistor R2 respectively. The other end of the fuse F1 is electrically connected to one end of the varistor RV1. The other end of the varistor RV1 is electrically connected to one end of the discharge tube F2. The municipal power L wire is electrically connected to the other end of the discharge tube F2 and the anode of the diode D1 respectively. The cathode of the diode D1 is electrically connected to the cathode of the zener diode D2 through the series-connected resistor R1. The anode of the zener diode D2 is electrically connected to the other end of the resistor R2 and one end of the indicator light LED1 respectively. The other end of the indicator light LED1 is grounded. For AC input, when the lightning surge voltage is too high, the varistor RV1 can initially reduce the surge voltage through absorption. At the same time, the discharge tube F2 absorbs the excess current. When lightning strikes, the zener diode D2 is broken down, and the current is connected to the ground wire to eliminate the hidden danger of large current, and the lightning protection effect is better. At the same time, the diode D1 plays a rectifying role to supply power to the indicator light LED1. The breakdown of the zener diode D2 causes the voltage to be fed to the indicator light LED1, and the indicator light LED1 lights up to indicate the lightning state, which is convenient for users to observe.
[0013] Further, it includes an indicator light LED2, an indicator light LED3, and a resistor R3. One end of the indicator light LED2 is electrically connected to the other end of the resistor R2. The other end of the indicator light LED2 is electrically connected to the anode of the zener diode D2. One end of the resistor R3 is electrically connected to the cathode of the diode D1. The other end of the resistor R3 is electrically connected to one end of the indicator light LED3. The other end of the indicator light LED3 is electrically connected to the municipal power N wire. Among them, the colors of the indicator lights LED1, LED2, and LED3 are different. When lightning strikes, the zener diode D2 is broken down, and the indicator light LED1 lights up. When working normally, the indicator lights LED2 / LED3 light up.
[0014] In some embodiments, the lightning protection multi-port charger circuit further includes a PWM control circuit 70, a power conversion circuit 50, an anti-interference circuit 20, a first rectifier and filter circuit 30, and a multi-channel charging port 80. One end of the anti-interference circuit 20 is electrically connected to the varistor RV1 to anti-interfere with the alternating current. The other end of the anti-interference circuit 20 is electrically connected to the input end of the first rectifier and filter circuit 30. The output end of the first rectifier and filter circuit 30 is respectively electrically connected to an input end of the power conversion circuit 50 and the power supply end of the PWM control circuit 70. The PWM signal end of the PWM control circuit 70 is electrically connected to the other output end of the power conversion circuit 50. The output end of the power conversion circuit 50 outputs a DC voltage to be electrically connected to the multi-channel charging port 80. When the lightning surge voltage is too high, the absorption by the varistor RV1 can reduce the surge voltage and give a relatively stable electrical signal to the subsequent first rectifier and filter unit. After further filtering of the EMC by the anti-interference circuit 20, a more stable electrical signal is obtained. The PWM control circuit 70 is used to control the power conversion, and a stable 5V DC power is output to the multi-channel charging port 80 to be output to devices such as mobile phones. The anti-interference circuit 20 includes an anti-interference coil LF1 and a capacitor C1. The capacitor C1 is connected in parallel with both ends of the varistor RV1. Two input ends of the anti-interference coil LF1 are respectively electrically connected to both ends of the capacitor C1. The output end of the anti-interference coil LF1 is electrically connected to the input end of the first rectifier and filter circuit 30. The structure is simple and the anti-interference effect is good. The first rectifier and filter circuit 30 includes a rectifier bridge BD1, an inductor L1, a capacitor C2, and a capacitor C3. The 1 end and the 2 end of the rectifier bridge BD1 are respectively electrically connected to the two output ends of the anti-interference coil LF1 correspondingly. The 3 end of the rectifier bridge BD1 is respectively electrically connected to one end of the inductor L1 and one end of the capacitor C2. The other end of the inductor L1 is electrically connected to one end of the capacitor C3. The 4 end of the rectifier bridge BD1, the other end of the capacitor C2, and the other end of the capacitor C3 are respectively grounded, which rectifies the alternating current and filters the rectified voltage.
[0015] Further, a peak absorption circuit 40 is further included. The peak absorption circuit 40 includes a resistor R4, a resistor R5, a capacitor C4, and a diode D3. The power conversion circuit 50 includes a transformer T1. One end of the capacitor C4, one end of the resistor R4, and an input end of the transformer T1 are respectively electrically connected to the output end of the first rectifier and filter circuit 30. The other end of the capacitor C4 is respectively electrically connected to the other end of the resistor R4 and one end of the resistor R5. The other end of the resistor R5 is electrically connected to the cathode of the diode D3. The anode of the diode D3 is electrically connected to the other input end of the transformer T1. The capacitor C4 plays a role in peak absorption.
[0016] In some embodiments, the power conversion circuit 50 further includes a second rectifying and filtering circuit 60. The second rectifying and filtering circuit 60 includes MOS transistor Q1, resistor R5, capacitor C5, capacitor C6, and capacitor C7. The drain of MOS transistor Q1 is electrically connected to the positive output terminal of transformer T1, one end of capacitor C5, and one end of resistor R5 respectively. The other end of capacitor C5 is electrically connected to the gate of MOS transistor Q1. Capacitor C3 provides power supply. The other end of resistor R5 is electrically connected to the source of MOS transistor Q1 and one end of capacitor C7 respectively through series-connected capacitor C6. Capacitor C6 functions as peak absorption, and capacitor C7 functions as filtering. Transformer T1 is coupled to the secondary through a turns ratio to obtain a corresponding AC voltage, and then an ideal DC voltage is obtained through the rectification of MOS transistor Q1 and the filtering of capacitor C7.
[0017] It is easy for those skilled in the art to understand that, on the premise of no conflict, the above preferred modes can be freely combined and superimposed.
[0018] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification and drawings of the present invention under the inventive concept of the present invention, or directly or indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.
Claims
1. A lightning protection multi-port charger circuit, characterized in that, Comprising: A lightning protection circuit (10), the lightning protection circuit (10) includes a fuse F1, a varistor RV1, a discharge tube F2, a diode D1, a zener diode D2, a resistor R1, a resistor R2, a resistor R3 and an indicator LED1. The mains N wire is electrically connected to one end of the fuse F1 and one end of the resistor R2 respectively. The other end of the fuse F1 is electrically connected to one end of the varistor RV1. The other end of the varistor RV1 is electrically connected to one end of the discharge tube F2. The mains L wire is electrically connected to the other end of the discharge tube F2 and the anode of the diode D1 respectively. The cathode of the diode D1 is electrically connected to the cathode of the zener diode D2 through the series-connected resistor R1. The anode of the zener diode D2 is electrically connected to the other end of the resistor R2 and one end of the indicator LED1 respectively. The other end of the indicator LED1 is grounded.
2. The lightning protection multi-port charger circuit according to claim 1, characterized in that: It includes an indicator LED2, an indicator LED3 and a resistor R3. One end of the indicator LED2 is electrically connected to the other end of the resistor R2. The other end of the indicator LED2 is electrically connected to the anode of the zener diode D2. One end of the resistor R3 is electrically connected to the cathode of the diode D1. The other end of the resistor R3 is electrically connected to one end of the indicator LED3. The other end of the indicator LED3 is electrically connected to the mains N wire, wherein the colors of the indicator LED1, the indicator LED2 and the indicator LED3 are different from each other.
3. The lightning protection multi-port charger circuit according to claim 1, characterized in that: It includes a PWM control circuit (70), a power conversion circuit (50), an anti-interference circuit (20), a first rectifier filter circuit (30) and a multi-port charging port (80). One end of the anti-interference circuit (20) is electrically connected to the varistor RV1 to perform anti-interference on the alternating current. The other end of the anti-interference circuit (20) is electrically connected to the input end of the first rectifier filter circuit (30). The output end of the first rectifier filter circuit (30) is electrically connected to one input end of the power conversion circuit (50) and the power supply end of the PWM control circuit (70) respectively. The PWM signal end of the PWM control circuit (70) is electrically connected to the other output end of the power conversion circuit (50). The output end of the power conversion circuit (50) outputs a DC voltage to be electrically connected to the multi-port charging port (80).
4. The lightning protection multi-port charger circuit according to claim 3, characterized in that: The anti-interference circuit (20) includes an anti-interference coil LF1 and a capacitor C1. The capacitor C1 is connected in parallel with both ends of the varistor RV1. Two input ends of the anti-interference coil LF1 are electrically connected to both ends of the capacitor C1 respectively. The output end of the anti-interference coil LF1 is electrically connected to the input end of the first rectifier filter circuit (30).
5. The lightning protection multi-port charger circuit according to claim 3, characterized in that: The first rectifying and filtering circuit (30) includes a rectifier bridge BD1, an inductor L1, a capacitor C2, and a capacitor C3. The 1st terminal and the 2nd terminal of the rectifier bridge BD1 are respectively and correspondingly electrically connected to the two output terminals of the anti-interference coil LF1. The 3rd terminal of the rectifier bridge BD1 is respectively electrically connected to one end of the inductor L1 and one end of the capacitor C2. The other end of the inductor L1 is electrically connected to one end of the capacitor C3. The 4th terminal of the rectifier bridge BD1, the other end of the capacitor C2, and the other end of the capacitor C3 are respectively grounded.
6. The lightning protection multi-port charger circuit according to claim 3, characterized in that: It further includes a peak absorption circuit (40). The peak absorption circuit (40) includes a resistor R4, a resistor R5, a capacitor C4, and a diode D3. The power conversion circuit (50) includes a transformer T1. One end of the capacitor C4, one end of the resistor R4, and one input terminal of the transformer T1 are respectively electrically connected to the output terminal of the first rectifying and filtering circuit (30). The other end of the capacitor C4 is respectively electrically connected to the other end of the resistor R4 and one end of the resistor R5. The other end of the resistor R5 is electrically connected to the cathode of the diode D3. The anode of the diode D3 is electrically connected to the other input terminal of the transformer T1.
7. The lightning protection multi-port charger circuit according to claim 6, characterized in that: The power conversion circuit (50) further includes a second rectifying and filtering circuit (60). The second rectifying and filtering circuit (60) includes a MOS transistor Q1, a resistor R5, a capacitor C5, a capacitor C6, and a capacitor C7. The drain of the MOS transistor Q1 is respectively electrically connected to the positive output terminal of the transformer T1, one end of the capacitor C5, and one end of the resistor R5. The other end of the capacitor C5 is electrically connected to the gate of the MOS transistor Q1. The other end of the resistor R5 is respectively electrically connected to the source of the MOS transistor Q1 and one end of the capacitor C7 through the series-connected capacitor C6. The transformer T1 is coupled to the secondary through a turns ratio to obtain a corresponding AC voltage, and then an ideal DC voltage is obtained through the rectification of the MOS transistor Q1 and the filtering of the capacitor C7.