CN211830567U - Lightning protection filtering power supply circuit - Google Patents
Lightning protection filtering power supply circuit Download PDFInfo
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- CN211830567U CN211830567U CN202020737951.8U CN202020737951U CN211830567U CN 211830567 U CN211830567 U CN 211830567U CN 202020737951 U CN202020737951 U CN 202020737951U CN 211830567 U CN211830567 U CN 211830567U
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Abstract
The utility model relates to a lightning protection filter power supply circuit, which comprises a circuit board, wherein a rectifying circuit, a switching power supply circuit and a lightning protection circuit are arranged on the circuit board; the filter and the lightning protection device are designed on the circuit board, so that the problems of high cost, inconvenient maintenance and the like caused by externally adding the filter and the lightning protection device in the prior art are solved.
Description
Technical Field
The utility model relates to a power supply circuit technical field specifically is a lightning protection filter power supply circuit.
Background
The current system channel power supply is supplied by a power panel, 220V is reduced to 18V and 35V alternating current through a transformer after being accessed, then the power is supplied to a machine core through a rectifying circuit, and a control power supply is realized by adding a switching power supply after being rectified. However, the rectification circuit and the switching power supply generate certain interference to the power grid, and the interference of the power grid to the channel system can also be coupled into the system by the transformer. The existing scheme is to add a filter and a lightning protector outside, but the filter and the lightning protector have large volume, high cost and inconvenient maintenance.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the power supply circuit aims at solving the problem that an existing power supply circuit is additionally provided with a filter and a lightning protection device on the outside.
In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a lightning protection filtering power supply circuit, including the circuit board, be provided with rectifier circuit, switching power supply circuit and lightning protection circuit on the circuit board, design the function that wave filter and lightning protection device realized on the circuit board, saved heavy wave filter and lightning protection device;
the switching power supply circuit comprises a switching regulator U1, a terminal 2 of the switching regulator U1 is connected with an output voltage V of the rectifying circuit, electrolytic capacitors C1, C2 and C3 are connected between the terminal 2 of the switching regulator U1 and the ground in parallel, a resistor R1 is connected with the electrolytic capacitor C5 in series and then connected with the electrolytic capacitor C6 in parallel, the parallel anode is connected with a terminal 6 of the switching regulator U1, the parallel cathode is grounded, a terminal 4 of the switching regulator U1 is connected with a resistor R2 and then grounded, and a terminal 7 and a terminal 9 are both grounded; a terminal 1 of the switching regulator U1 is grounded after being connected in series with an electrolytic capacitor C4 and a diode D1, the anode of the diode D1 is grounded, a terminal 8 is connected in series with an inductor L1 and four electrolytic capacitors C7, C8, C9 and C10 which are sequentially connected in parallel, the parallel anode is connected with a +12V power supply, the parallel cathode is grounded, a resistor R3 and the inductor L1 are connected in series between a terminal 5 and the terminal 8, and a resistor R3 and the common end of the terminal 5 are connected with a resistor R4 and then grounded; the capacitor connected in parallel with the two ends of the resistor or the inductor connected in series with the resistor, and various circuits composed of the capacitor and the inductor are filter circuits;
the lightning protection circuit comprises common-mode inductors T1 and T2, a terminal 1 of the common-mode inductor T1 is connected with a resistor R6, a piezoresistor R5 and an electrolytic capacitor C11 in series and then is connected with a terminal 2 of the common-mode inductor T1, the common end of the piezoresistor R5 and the terminal 2 of the common-mode inductor T1 is connected with a lightning arrester F1 and then is connected with a live wire L, and the other end of the live wire L is connected with a zero line N; an electrolytic capacitor C12, a resistor R7 and electrolytic capacitors C13 and C14 which are connected in series are connected in parallel between a terminal 3 and a terminal 4 of the common mode inductor T1, and the cathodes of the electrolytic capacitors C13 and C14 are connected and lead out protective grounding PE; the terminal 1 and the terminal 2 of the common mode inductor T2 are respectively connected with the positive electrode of the electrolytic capacitor C14 and the positive electrode of the electrolytic capacitor C13, an electrolytic capacitor C15 is connected in series between the terminal 3 and the terminal 4 of the common mode inductor T2, the positive electrode of the electrolytic capacitor C15 is connected with a live wire L1, and the negative electrode of the electrolytic capacitor C15 is connected with a zero wire N1; the lightning protection circuit is connected between a lead and the ground, is usually connected with a protected device in parallel, and can effectively protect the power equipment; in case abnormal voltage appears, the lightning protection circuit plays a role in protection, and after the voltage value is normal, the lightning protection circuit is rapidly restored to the original state to ensure normal power supply of the system.
Further, the switching regulator U1 is a TPS54360DDAR switching regulator, is limited by inductive current, and has the advantages of light pulse load, high efficiency and good stability.
Furthermore, the diode D1 adopts a model SK310A-TP diode, and the recovery speed is high.
The utility model has the advantages that: the utility model provides a pair of lightning protection filtering power supply circuit, with the functional design that wave filter and lightning protection device realized to the circuit board above, overcome the tradition externally increase the cost height that wave filter and lightning protection device brought and maintain inconvenient scheduling problem.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 1, the utility model provides a lightning protection filter power circuit, which comprises a circuit board, wherein the circuit board is provided with a rectifying circuit, a switching power circuit and a lightning protection circuit, and the functions realized by a filter and a lightning protection device are designed on the circuit board, so that the heavy filter and lightning protection device are omitted;
the switching power supply circuit comprises a switching regulator U1, a terminal 2 of the switching regulator U1 is connected with an output voltage V of the rectifying circuit, electrolytic capacitors C1, C2 and C3 are connected between the terminal 2 of the switching regulator U1 and the ground in parallel, a resistor R1 is connected with the electrolytic capacitor C5 in series and then connected with the electrolytic capacitor C6 in parallel, the parallel anode is connected with a terminal 6 of the switching regulator U1, the parallel cathode is grounded, a terminal 4 of the switching regulator U1 is connected with a resistor R2 and then grounded, and a terminal 7 and a terminal 9 are both grounded; a terminal 1 of the switching regulator U1 is grounded after being connected in series with an electrolytic capacitor C4 and a diode D1, the anode of the diode D1 is grounded, a terminal 8 is connected in series with an inductor L1 and four electrolytic capacitors C7, C8, C9 and C10 which are sequentially connected in parallel, the parallel anode is connected with a +12V power supply, the parallel cathode is grounded, a resistor R3 and the inductor L1 are connected in series between a terminal 5 and the terminal 8, and a resistor R3 and the common end of the terminal 5 are connected with a resistor R4 and then grounded; the capacitor connected in parallel with the two ends of the resistor or the inductor connected in series with the resistor, and various circuits composed of the capacitor and the inductor are filter circuits;
the lightning protection circuit comprises common-mode inductors T1 and T2, a terminal 1 of the common-mode inductor T1 is connected with a resistor R6, a piezoresistor R5 and an electrolytic capacitor C11 in series and then is connected with a terminal 2 of the common-mode inductor T1, the common end of the piezoresistor R5 and the terminal 2 of the common-mode inductor T1 is connected with a lightning arrester F1 and then is connected with a live wire L, and the other end of the live wire L is connected with a zero line N; an electrolytic capacitor C12, a resistor R7 and electrolytic capacitors C13 and C14 which are connected in series are connected in parallel between a terminal 3 and a terminal 4 of the common mode inductor T1, and the cathodes of the electrolytic capacitors C13 and C14 are connected and lead out protective grounding PE; the terminal 1 and the terminal 2 of the common mode inductor T2 are respectively connected with the positive electrode of the electrolytic capacitor C14 and the positive electrode of the electrolytic capacitor C13, an electrolytic capacitor C15 is connected in series between the terminal 3 and the terminal 4 of the common mode inductor T2, the positive electrode of the electrolytic capacitor C15 is connected with a live wire L1, and the negative electrode of the electrolytic capacitor C15 is connected with a zero wire N1; the lightning protection circuit is connected between a lead and the ground, is usually connected with a protected device in parallel, and can effectively protect the power equipment; in case abnormal voltage appears, the lightning protection circuit plays a role in protection, and after the voltage value is normal, the lightning protection circuit is rapidly restored to the original state to ensure normal power supply of the system.
As shown in fig. 1, the switching regulator U1 is a 60V, 3.5A buck regulator with integrated high-side MOSFET, and is a TPS54360DDAR switching regulator, which has good stability.
As shown in FIG. 1, the diode D1 is an SK310A-TP diode, which has an average rectified current of 3A and a high recovery speed.
The utility model provides a pair of lightning protection filtering power supply circuit, with the functional design that wave filter and lightning protection device realized to the circuit board above, overcome the tradition externally increase the cost height that wave filter and lightning protection device brought and maintain inconvenient scheduling problem.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. A lightning protection filter power supply circuit characterized by: the lightning protection circuit comprises a circuit board, wherein a rectifying circuit, a switching power supply circuit and a lightning protection circuit are arranged on the circuit board;
the switching power supply circuit comprises a switching regulator U1, a terminal 2 of the switching regulator U1 is connected with an output voltage V of the rectifying circuit, electrolytic capacitors C1, C2 and C3 are connected between the terminal 2 of the switching regulator U1 and the ground in parallel, a resistor R1 is connected with the electrolytic capacitor C5 in series and then connected with the electrolytic capacitor C6 in parallel, the parallel anode is connected with a terminal 6 of the switching regulator U1, the parallel cathode is grounded, a terminal 4 of the switching regulator U1 is connected with a resistor R2 and then grounded, and a terminal 7 and a terminal 9 are both grounded; a terminal 1 of the switching regulator U1 is grounded after being connected in series with an electrolytic capacitor C4 and a diode D1, the anode of the diode D1 is grounded, a terminal 8 is connected in series with an inductor L1 and four electrolytic capacitors C7, C8, C9 and C10 which are sequentially connected in parallel, the parallel anode is connected with a +12V power supply, the parallel cathode is grounded, a resistor R3 and the inductor L1 are connected in series between a terminal 5 and the terminal 8, and a resistor R3 and the common end of the terminal 5 are connected with a resistor R4 and then grounded;
the lightning protection circuit comprises common-mode inductors T1 and T2, a terminal 1 of the common-mode inductor T1 is connected with a resistor R6, a piezoresistor R5 and an electrolytic capacitor C11 in series and then is connected with a terminal 2 of the common-mode inductor T1, the common end of the piezoresistor R5 and the terminal 2 of the common-mode inductor T1 is connected with a lightning arrester F1 and then is connected with a live wire L, and the other end of the live wire L is connected with a zero line N; an electrolytic capacitor C12, a resistor R7 and electrolytic capacitors C13 and C14 which are connected in series are connected in parallel between a terminal 3 and a terminal 4 of the common mode inductor T1, and the cathodes of the electrolytic capacitors C13 and C14 are connected and lead out protective grounding PE; the terminal 1 and the terminal 2 of the common mode inductor T2 are respectively connected with the positive electrode of the electrolytic capacitor C14 and the positive electrode of the electrolytic capacitor C13, the electrolytic capacitor C15 is connected in series between the terminal 3 and the terminal 4 of the common mode inductor T2, the positive electrode of the electrolytic capacitor C15 is connected with the live wire L1, and the negative electrode of the electrolytic capacitor C15 is connected with the zero wire N1.
2. The lightning protection filter power supply circuit of claim 1, wherein: the switching regulator U1 is a TPS54360DDAR switching regulator.
3. The lightning protection filter power supply circuit of claim 1, wherein: the diode D1 is an SK310A-TP diode.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020563713X | 2020-04-16 | ||
| CN202020563713 | 2020-04-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211830567U true CN211830567U (en) | 2020-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020737951.8U Active CN211830567U (en) | 2020-04-16 | 2020-05-08 | Lightning protection filtering power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211830567U (en) |
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2020
- 2020-05-08 CN CN202020737951.8U patent/CN211830567U/en active Active
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