CN210629097U - Dual-power circuit - Google Patents
Dual-power circuit Download PDFInfo
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- CN210629097U CN210629097U CN201922102664.XU CN201922102664U CN210629097U CN 210629097 U CN210629097 U CN 210629097U CN 201922102664 U CN201922102664 U CN 201922102664U CN 210629097 U CN210629097 U CN 210629097U
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Abstract
The utility model discloses a dual power supply circuit, including the controller and with two input circuit that control is connected, input circuit is including the switch circuit, lightning protection circuit and the input power who is connected with the controller in proper order, the lightning protection circuit is including continuous electric discharge tube and first filtering system, first filtering system includes first inductance and first electric capacity, first inductance is connected between input power and switch circuit, first inductance passes through with input power's junction first electric capacity ground connection, first inductance passes through with switch circuit's junction electric discharge tube ground connection. A lightning protection circuit is arranged between the input power supply and the switch circuit, an electric discharge tube on the lightning protection circuit can absorb over-high voltage, the input power supply in the circuit is protected from being damaged by lightning, and the lightning protection circuit has good lightning protection performance.
Description
Technical Field
The utility model relates to a power electronic technology field especially relates to a dual supply circuit.
Background
In the mobile communication technology, the radiation angle of the base station antenna needs to be adjusted to cover different mobile communication areas, and the antenna is usually adjusted by using an antenna transmission mechanism, that is, a remote electrical tilt device. The remote electric regulation device requires the input voltage of a power supply to be between 30V and 10V according to the AISG protocol, so a plurality of power supplies with different voltages are required. The power supply applied to the outdoor antenna has harsh application environment, particularly, a plurality of power supplies need to be provided with special lightning protection, and the existing multi-power-supply circuit lacks relevant lightning protection measures, so that the protection effect is not ideal.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: a double-power circuit with good lightning protection effect is provided.
In order to solve the technical problem, the utility model discloses a technical scheme be: the utility model provides a dual supply circuit, including the controller and with two input circuit that the control is connected, input circuit is including the switch circuit, lightning protection circuit and the input power who are connected with the controller in proper order, the lightning protection circuit is including continuous electric discharge tube and first filtering system, first filtering system includes first inductance and first electric capacity, first inductance is connected between input power and switch circuit, first inductance passes through with input power's junction first electric capacity ground connection, first inductance passes through with switch circuit's junction electric discharge tube ground connection.
Furthermore, the lightning protection circuit further comprises a second filtering system, the second filtering system comprises a second inductor and a second capacitor, one end of the second inductor is connected to the connection position of the first inductor and the electric discharge tube, the other end of the second inductor is connected to the switch circuit, and the other end of the second inductor is grounded through the second capacitor.
Further, the lightning protection circuit still includes the TVS pipe, the negative pole of TVS pipe connect in the other end of second inductance, the anodal ground connection of TVS pipe.
The controller further comprises a control circuit, the control circuit comprises a first triode and a second triode, a collector of the first triode is connected with the switch circuit, a base of the first triode is connected with a collector of the second triode, and a base of the second triode is connected with the control end of the controller.
The filter circuit further comprises a third filter system, the third filter system comprises a third inductor and a third capacitor, one end of the third inductor is connected with the switch circuit, and the other end of the third inductor is grounded through the third capacitor.
Further, the third filter system further includes a fourth capacitor, and the fourth capacitor is connected in parallel with the third capacitor.
Further, the power supply further comprises a diode arranged between the third inductor and the switch circuit, wherein the anode of the diode is connected with the switch circuit, and the cathode of the diode is connected with the third inductor.
Furthermore, the diode also comprises a fifth capacitor, and the cathode of the diode is grounded through the fifth capacitor.
The beneficial effects of the utility model reside in that: a lightning protection circuit is arranged between the input power supply and the switch circuit, an electric discharge tube on the lightning protection circuit can absorb over-high voltage, the input power supply in the circuit is protected from being damaged by lightning, and the lightning protection circuit has good lightning protection performance.
Drawings
Fig. 1 is a circuit diagram of a dual power supply circuit according to a first embodiment of the present invention;
fig. 2 is a circuit diagram of a lightning protection circuit of a dual power circuit according to a first embodiment of the present invention.
Description of reference numerals:
u1, a controller; u2, a switching circuit; u3, lightning protection circuit; u4, input power supply;
G. an electrical discharge tube; d1, TVS tube; d2, a diode;
q1, the first triode; q2, the second triode;
l1, a first inductor; l2, a second inductor; l3, third inductance;
c1, a first capacitance; c2, a second capacitor; c3, a third capacitance; c4, a fourth capacitance; c5, a fifth capacitance.
Detailed Description
In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.
The utility model discloses the most crucial design lies in: the electric discharge tube on the lightning protection circuit can absorb over-high voltage to protect the input power supply in the circuit.
Referring to fig. 1 and 2, a dual power supply circuit includes a controller U1 and two input circuits connected to the controller, where the input circuits include a switch circuit U2, a lightning protection circuit U3 and an input power supply U4 which are sequentially connected to the controller U1, the lightning protection circuit U3 includes an electrical discharge tube G and a first filter system connected to each other, the first filter system includes a first inductor L1 and a first capacitor C1, the first inductor L1 is connected between the input power supply U4 and the switch circuit U2, a connection point between the first inductor L1 and the input power supply U4 is grounded through the first capacitor C1, and a connection point between the first inductor L1 and the switch circuit U2 is grounded through the electrical discharge tube G.
The structure/working principle of the utility model is as follows: the electric discharge tube in the lightning protection circuit can absorb the over-high voltage caused by lightning in a short time, an input power supply in the dual-power circuit is protected from being damaged by the lightning amount, the first filtering system enables the load impedance and the internal impedance of the excitation source to be mutually adaptive, and the energy benefit of the dual-power circuit can be effectively improved.
From the above description, the beneficial effects of the present invention are: a lightning protection circuit is arranged between the input power supply and the switch circuit, an electric discharge tube on the lightning protection circuit can absorb over-high voltage, the input power supply in the circuit is protected from being damaged by lightning, and the lightning protection circuit has good lightning protection performance.
Further, the lightning protection circuit U3 further includes a second filter system, the second filter system includes a second inductor L2 and a second capacitor C2, one end of the second inductor L2 is connected to the connection between the first inductor L1 and the electric discharge tube G, the other end of the second inductor L2 is connected to the switch circuit U2, and the other end of the second inductor L2 is further grounded through the second capacitor C2.
As can be seen from the above description, the second filtering system can filter the residual voltage value to adjust the impedance matching of the signal output terminal.
Further, the lightning protection circuit U3 further includes a TVS tube D1, a negative electrode of the TVS tube D1 is connected to the other end of the second inductor L2, and a positive electrode of the TVS tube D1 is grounded.
As can be seen from the above description, the TVS tube can effectively suppress the residual voltage value and protect the signal from lightning surge.
Further, the controller comprises a control circuit, the control circuit comprises a first triode Q1 and a second triode, a collector of the first triode Q1 is connected with the switching circuit U2, a base of the first triode Q1 is connected with a collector of the second triode Q2, and a base of the second triode Q2 is connected with a control end of the controller U1.
As can be seen from the above description, the control circuit composed of the first transistor and the second transistor has higher reliability.
Furthermore, the filter further comprises a third filter system, the third filter system comprises a third inductor L3 and a third capacitor C3, one end of the third inductor L3 is connected to the switch circuit U2, and the other end of the third inductor L3 is grounded through a third capacitor C3.
Further, the third filtering system further includes a fourth capacitor C4, and the fourth capacitor C4 is connected in parallel with the third capacitor C3.
Further, the inductor also comprises a diode D2 arranged between the third inductor L3 and the switch circuit U2, wherein the anode of the diode D2 is connected with the switch circuit U2, and the cathode of the diode D2 is connected with the third inductor L3.
As can be seen from the above description, the unidirectional path of the diode can shield the interference of the external signal.
Furthermore, the capacitor further comprises a fifth capacitor C5, and the cathode of the diode D2 is grounded through the fifth capacitor C5.
Example one
Referring to fig. 1 and fig. 2, a first embodiment of the present invention is: a dual-power circuit comprises a controller U1 and two input circuits connected with the controller, wherein the input circuits comprise a switch circuit U2, a lightning protection circuit U3 and an input power U4 which are sequentially connected with a controller U1, the voltage of the input power U4 in the input circuits is not equal, the lightning protection circuit U3 comprises an electric discharge tube G and a first filtering system which are connected, the first filtering system comprises a first inductor L1 and a first capacitor C1, the first inductor L1 is connected between the input power U4 and the switch circuit U2, the connection position of the first inductor L1 and the input power U4 is grounded through the first capacitor C1, and the connection position of the first inductor L1 and the switch circuit U2 is grounded through the electric discharge tube G. The controller U1 in this embodiment is a single chip microcomputer controller, the related technology of which is well known to those skilled in the art, and the two input circuits are respectively connected to a CORTL1 pin and a CORTL2 pin of the single chip microcomputer controller.
It is easy to understand that, the electric discharge tube G in the lightning protection circuit U3 can absorb the excessive voltage caused by the lightning in a short time, protect the input power supply U4 in the dual power supply circuit from being damaged by the lightning, and the electric discharge tube G and the first filter system are combined to make the load impedance and the internal impedance of the excitation source mutually adaptive, so that the energy efficiency of the dual power supply circuit U3 can be effectively improved.
Referring to fig. 2, the lightning protection circuit U3 further includes a second filtering system, the second filtering system includes a second inductor L2 and a second capacitor C2, one end of the second inductor L2 is connected to a connection between the first inductor L1 and the electric discharge tube G, the other end of the second inductor L2 is connected to the switch circuit U2, and the other end of the second inductor L2 is further grounded through the second capacitor C2, optionally, the first inductor L1 is an air-core adjustable inductor, and the second inductor L2 is a magnetic core inductor.
Optionally, the lightning protection circuit U3 further includes a TVS tube D1, a negative electrode of the TVS tube D1 is connected to the other end of the second inductor L2, and a positive electrode of the TVS tube D1 is grounded.
Referring to fig. 1, the control circuit includes a first transistor Q1 and a second transistor, a base of the first transistor Q1 is connected to a collector of the second transistor Q2, a base of the second transistor Q2 is connected to a control end of the controller U1, and the switch circuit U2 is an MOS transistor, specifically, the MOS transistor is a P-channel depletion type MOS transistor. When the controller U1 outputs a high level, the second transistor Q2 is turned on, and the first transistor Q1 is turned off; in contrast, when the controller U1 outputs a low level, the second transistor Q2 is turned off, and the first transistor Q1 is turned on, so that the single chip microcomputer controller can switch the operation modes of the two input circuits by outputting different signals at the CORTL1 pin and the CORTL2 pin.
The filter circuit further comprises a third filtering system, wherein the third filtering system comprises a third inductor L3 and a third capacitor C3, one end of the third inductor L3 is connected with the switch circuit U2, and the other end of the third inductor L3 is grounded through a third capacitor C3.
Preferably, the third filter system further comprises a fourth capacitor C4, and the fourth capacitor C4 is connected in parallel with the third capacitor C3.
The dual-power circuit further comprises a fifth capacitor C5 and a diode D2 arranged between the third inductor L3 and the switch circuit U2, the anode of the diode D2 is connected with the switch circuit U2, the cathode of the diode D2 is connected with the third inductor L3, and the cathode of the diode D2 is grounded through the fifth capacitor C5.
To sum up, the utility model provides a dual supply circuit is equipped with the lightning protection circuit between input power and the switch circuit, and the electric discharge tube on the lightning protection circuit can absorb too high voltage, and the input power among the protection circuit avoids the thunder and lightning to destroy, has good lightning protection performance.
The above mentioned is only the embodiment of the present invention, and not the limitation of the patent scope of the present invention, all the equivalent transformations made by the contents of the specification and the drawings, or the direct or indirect application in the related technical field, are included in the patent protection scope of the present invention.
Claims (8)
1. A dual power supply circuit, characterized in that: the lightning protection circuit comprises an electric discharge tube and a first filtering system, wherein the electric discharge tube and the first filtering system are connected in sequence, the first filtering system comprises a first inductor and a first capacitor, the first inductor is connected between the input power supply and the switch circuit, the joint of the first inductor and the input power supply is grounded through the first capacitor, and the joint of the first inductor and the switch circuit is grounded through the electric discharge tube.
2. The dual power supply circuit of claim 1, wherein: the lightning protection circuit further comprises a second filtering system, the second filtering system comprises a second inductor and a second capacitor, one end of the second inductor is connected to the joint of the first inductor and the electric discharge tube, the other end of the second inductor is connected to the switch circuit, and the other end of the second inductor is grounded through the second capacitor.
3. The dual power supply circuit of claim 2, wherein: the lightning protection circuit further comprises a TVS tube, the negative electrode of the TVS tube is connected to the other end of the second inductor, and the positive electrode of the TVS tube is grounded.
4. The dual power supply circuit of claim 1, wherein: the controller is characterized by further comprising a control circuit, wherein the control circuit comprises a first triode and a second triode, a collector of the first triode is connected with the switch circuit, a base of the first triode is connected with a collector of the second triode, and a base of the second triode is connected with the control end of the controller.
5. The dual power supply circuit of claim 1, wherein: the filter circuit further comprises a third filtering system, the third filtering system comprises a third inductor and a third capacitor, one end of the third inductor is connected with the switch circuit, and the other end of the third inductor is grounded through the third capacitor.
6. The dual power supply circuit of claim 5, wherein: the third filtering system further comprises a fourth capacitor connected in parallel with the third capacitor.
7. The dual power supply circuit of claim 5, wherein: the switch circuit is connected with the first inductor, the second inductor is connected with the second inductor, and the third inductor is connected with the switch circuit.
8. The dual power supply circuit of claim 7, wherein: the diode further comprises a fifth capacitor, and the cathode of the diode is grounded through the fifth capacitor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922102664.XU CN210629097U (en) | 2019-11-27 | 2019-11-27 | Dual-power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922102664.XU CN210629097U (en) | 2019-11-27 | 2019-11-27 | Dual-power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210629097U true CN210629097U (en) | 2020-05-26 |
Family
ID=70759870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922102664.XU Active CN210629097U (en) | 2019-11-27 | 2019-11-27 | Dual-power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210629097U (en) |
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2019
- 2019-11-27 CN CN201922102664.XU patent/CN210629097U/en active Active
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