CN212969438U - Surge suppression filter circuit, power supply equipment and aircraft - Google Patents
Surge suppression filter circuit, power supply equipment and aircraft Download PDFInfo
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- CN212969438U CN212969438U CN202022162043.3U CN202022162043U CN212969438U CN 212969438 U CN212969438 U CN 212969438U CN 202022162043 U CN202022162043 U CN 202022162043U CN 212969438 U CN212969438 U CN 212969438U
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Abstract
The utility model discloses a surge suppression filter circuit, power supply unit and aircraft, this circuit includes: the surge protection circuit, the filter inductor, the filter resistor and the filter capacitor component; the surge protection circuit comprises a first fuse and a standby branch connected with the first fuse in parallel, the standby branch comprises a second fuse and a shunt resistor assembly which are connected in series, the ratio of the resistance value of the first fuse to the resistance value of the standby branch is less than 1:2, the first end of the surge protection circuit is electrically connected with the power supply end of a power supply, and the second end of the surge protection circuit is electrically connected with an electric load through a filter inductor; the first end of the filter resistor is electrically connected with a first node between the filter inductor and the power load, and the second end of the filter resistor is grounded; the first end of the filter capacitor assembly is electrically connected with the first node, and the second end of the filter capacitor assembly is grounded. The utility model discloses set up two fusing branch roads of parallel connection, restrain surge current, reduce the fault rate that the maloperation arouses, improve the reliability.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a surge suppression filter circuit, power supply unit and aircraft.
Background
The Near space (Near space) is an airspace 20-100 kilometers away from the ground, is located in key areas above a typhoon, a rainstorm and other disastrous weather systems, and has great development potential in the Near space area by adopting an aircraft to carry out targeted target observation on meteorological indexes along with the development of communication technology and space flight technology.
At present, in a power supply system of an aircraft used in the field of meteorological monitoring, an input filter circuit adopted is usually a combination of an inductor and a capacitor, and due to the existence of a capacitive load, a large surge current is introduced at the moment of power supply switching-on, and even the surge current exceeds the rated current tolerance of some elements, so that the elements are damaged or even fail.
Therefore, improvements in existing filter circuits are needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a surge suppression filter circuit has solved the problem that the surge current that circular telegram produced destroys the component, improves power supply reliability and security.
In a first aspect, an embodiment of the present invention provides a surge suppression filter circuit, which is connected with a dc power supply and an electrical load, respectively, including: the surge protection circuit, the filter inductor, the filter resistor and the filter capacitor component; the surge protection circuit comprises a first fuse and a standby branch connected with the first fuse in parallel, the standby branch comprises a second fuse and a shunt resistor assembly which are connected in series, the ratio value between the resistance value of the first fuse and the resistance value of the standby branch is smaller than 1:2, the first end of the surge protection circuit is electrically connected with the power supply end of a power supply, the second end of the surge protection circuit is electrically connected with an electric load through the filter inductor, and a first node is arranged between the filter inductor and the electric load; the first end of the filter resistor is electrically connected with the first node, and the second end of the filter resistor is grounded; and the first end of the filter capacitor assembly is electrically connected with the first node, and the second end of the filter capacitor assembly is grounded.
Optionally, the first fuse has a first resistance value R1, the shunt resistance component has a second resistance value R2, and the first resistance value R1 and the second resistance value R2 satisfy: r2 > 10 × R1.
Optionally, the shunt resistance assembly includes a first shunt resistance and a second shunt resistance connected in parallel, and a resistance value of the first shunt resistance is equal to a resistance value of the second shunt resistance.
Optionally, the filter capacitor assembly includes a plurality of capacitors connected in parallel, and the plurality of capacitors include a first patch capacitor, a second patch capacitor, and a third patch capacitor.
Optionally, the surge protection circuit further includes a voltage dependent resistor, a first end of the voltage dependent resistor is electrically connected to one end of the first fuse, and a second end of the voltage dependent resistor is grounded.
Optionally, the surge suppression filter circuit further includes a first test terminal and a second test terminal, the first test terminal is electrically connected to one end of the first fuse, the second test terminal is electrically connected to one end of the second fuse, and the first test terminal and the second test terminal are used for connecting a test device.
In a second aspect, the embodiment of the present invention further provides a power supply device, including the above surge suppression filter circuit.
In a third aspect, the embodiment of the present invention further provides an aircraft, including the above power supply device.
The surge suppression filter circuit, the power supply equipment and the aircraft provided by the embodiment of the utility model are respectively electrically connected with a DC power supply and an electric load, the surge suppression filter circuit is provided with a surge protection circuit, a filter inductor, a filter resistor and a filter capacitor component, the surge protection circuit comprises a first fuse and a standby branch circuit connected with the first fuse in parallel, the standby branch circuit comprises a second fuse and a shunt resistor component connected in series, the ratio value between the resistance value of the first fuse and the resistance value of the standby branch circuit is less than 1:2, the shunt ratio value of the first fuse and the standby branch circuit is more than 2:1, if an instantaneous surge current exists, the first fuse is fused, the standby branch circuit is connected into the circuit to avoid the power failure of the electric load at the rear end, the filter inductor, the filter resistor and the filter capacitor component are adopted to filter the power supply voltage of the DC power supply, the problem that surge current generated by electrifying damages elements is solved, the failure rate caused by misoperation is reduced, and the power supply reliability and safety are improved.
Drawings
Fig. 1 is a schematic structural diagram of a surge suppression filter circuit according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of another surge suppression filter circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a power supply device according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of an aircraft provided by a third embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is the embodiment of the present invention provides a structural schematic diagram of a surge suppression filter circuit, and this embodiment is applicable to the application scenario of filtering the dc power supply of the aircraft.
As shown in fig. 1, the surge suppression filter circuit 1 is electrically connected to a dc power supply and an electric load, and includes: the surge protection circuit 10, the filter inductor L0, the filter resistor R0 and the filter capacitor assembly 20; the surge protection circuit 10 comprises a first fuse F1 and a standby branch circuit connected in parallel with the first fuse F1, the standby branch circuit comprises a second fuse F2 and a shunt resistance component 110 which are connected in series, the ratio value between the resistance value of the first fuse F1 and the resistance value of the standby branch circuit is smaller than 1:2, the first end of the surge protection circuit 10 is electrically connected with a power supply end, the second end of the surge protection circuit 10 is electrically connected with an electric load through a filter inductor L0, and a first node is arranged between the filter inductor L0 and the electric load; a first end of the filter resistor R0 is electrically connected with the first node, and a second end of the filter resistor R0 is grounded; a first terminal of the filter capacitor assembly 20 is electrically connected to the first node, and a second terminal of the filter capacitor assembly 20 is grounded.
The dc power supply is configured to provide a dc power supply voltage to the electrical load at the back end, and typically, the dc power supply voltage may have a voltage value of +12V dc voltage.
In this embodiment, the first fuse F1 and the second fuse F2 may adopt fuses with the same type and specification, and the front end of the second fuse F2 is connected in series with the shunt resistor assembly 110 to form an unbalanced parallel structure.
Specifically, when the voltage conversion circuit is normally used, current mainly passes through the first fuse F1, if the power supply input current is too large due to misoperation, the first fuse F1 is heated and disconnected, and the standby branch is connected to the circuit to normally supply power to an electric load at the rear end of the circuit; if the circuit current is too large due to the short-circuit fault of the electric load at the rear end of the circuit, the first fuse F1 and the standby branch circuit are both heated and disconnected, the system reliability is improved, and the load shutdown fault rate caused by misoperation is reduced.
The surge suppression filter circuit provided by the embodiment of the utility model is provided with a surge protection circuit, a filter inductor, a filter resistor and a filter capacitor component, wherein the surge protection circuit comprises a first fuse and a standby branch which is connected with the first fuse in parallel, the standby branch comprises a second fuse and a shunt resistor component which are connected in series, the ratio value between the resistance value of the first fuse and the resistance value of the standby branch is less than 1:2, the shunt ratio value between the first fuse and the standby branch is more than 2:1, if instantaneous surge current exists, the first fuse is preferentially fused, the standby branch is connected into the circuit to avoid the power failure of a rear end electric load, the filter inductor, the filter resistor and the filter capacitor component are adopted to filter the power supply voltage of a direct current power supply, the problem that the elements are damaged by the surge current generated by electrifying is solved, and the fault rate caused by misoperation is reduced, and the power supply reliability and safety are improved.
Optionally, the first fuse F1 has a first resistance value R1, the shunt resistance component has a second resistance value R2, and the first resistance value R1 and the second resistance value R2 satisfy: r2 > 10 × R1.
In this embodiment, when the voltage converting circuit is normally used, the resistances of the first fuse F1 and the second fuse F2 are in the milliohm range, and the total resistance of the shunt resistance component 110 can be set to 0.5 ohm, so as to ensure that the shunt ratio between the first fuse F1 and the spare branch exceeds 95%: 5%, it is beneficial to improving the system reliability.
Alternatively, referring to fig. 1, the shunt resistance assembly 110 includes a first shunt resistance R10 and a second shunt resistance R20 connected in parallel, and a resistance value of the first shunt resistance R10 is equal to a resistance value of the second shunt resistance R20.
Illustratively, the first shunt resistor R10 and the second shunt resistor R20 may employ 2512 patch resistors having a resistance value equal to 1 ohm.
Optionally, referring to fig. 1, the filter capacitor assembly includes a plurality of capacitors connected in parallel, and the plurality of capacitors includes a first chip capacitor C1, a second chip capacitor C2, and a third chip capacitor C3.
Illustratively, the capacitance value of the first chip capacitor C1 is equal to 10nF, the capacitance value of the second chip capacitor C2 is equal to 100nF, and the capacitance value of the third chip capacitor C3 is equal to 100 nF.
It should be noted that specific capacitance values of the first patch capacitor, the second patch capacitor and the third patch capacitor can be adjusted according to the power supply voltage of the dc power supply, which is not limited to this, and signal noise of different frequency bands can be filtered out through the plurality of capacitors connected in parallel, thereby improving the filtering effect of the filtering unit.
Optionally, referring to fig. 1, the surge suppressing filter circuit 1 further includes a first test terminal TP1 and a second test terminal TP2, the first test terminal TP1 is electrically connected to one end of the first fuse F1, the second test terminal TP2 is electrically connected to one end of the second fuse F2, and the first test terminal TP1 and the second test terminal TP2 are used for connecting a test device.
In the testing process, the first testing terminal TP1 and the second testing terminal TP2 are electrically connected to a testing device, after power is turned on, the testing device detects the current flowing through the first fuse F1 and the second fuse F2, tests and verifies the shunt proportion value of the branch where the first fuse F1 is located and the standby branch, and adjusts the resistance value of the shunt resistance component 110 in the standby branch through testing, so as to ensure that the shunt proportion of the first fuse F1 and the standby branch exceeds 95%: 5%, it is beneficial to improving the system reliability.
Fig. 2 is a schematic structural diagram of another surge suppression filter circuit according to an embodiment of the present invention.
Optionally, referring to fig. 2, the surge protection circuit 10 further includes a voltage dependent resistor VSR, a first end of the voltage dependent resistor VSR is electrically connected to one end of the first fuse F1, and a second end of the voltage dependent resistor VSR is grounded.
Referring to fig. 2, a first terminal of the voltage dependent resistor VSR may be electrically connected to a node between the first fuse F1 and the filter inductor L0.
The voltage dependent resistor VSR is a sensitive element with nonlinear volt-ampere characteristics, under the condition of normal voltage, the impedance of the voltage dependent resistor VSR is very high, a branch circuit where the voltage dependent resistor VSR is located can be approximately regarded as an open circuit, and the circuit is hardly influenced; if overvoltage exists in the circuit, the internal resistance of the voltage dependent resistor VSR is sharply reduced, a branch circuit where the voltage dependent resistor VSR is located is rapidly conducted, the power supply voltage is clamped at a preset voltage value, the power utilization load at the rear end of the circuit is prevented from being damaged by the overvoltage, and the power supply reliability and safety are improved.
Example two
Fig. 3 is a schematic structural diagram of a power supply device according to an embodiment of the present invention. As shown in fig. 3, the power supply device 100 includes the above-described surge suppression filter circuit 1.
In this embodiment, the power supply device 100 may further include a voltage conversion circuit with different voltage levels and the surge suppression filter circuit, which are connected in series and in cascade, so as to adapt to the electrical loads with different rated operating voltages, and provide multiple power supply voltages for the electrical loads at the rear end.
Therefore, the power supply device provided by the embodiment of the utility model is provided with the surge suppression filter circuit, the surge suppression filter circuit is provided with the surge protection circuit, the filter inductor, the filter resistor and the filter capacitor component, the surge protection circuit comprises the first fuse and the standby branch circuit connected with the first fuse in parallel, the standby branch circuit comprises the second fuse and the shunt resistor component connected in series, the ratio value between the resistance value of the first fuse and the resistance value of the standby branch circuit is less than 1:2, the shunt ratio value of the first fuse and the standby branch circuit is more than 2:1, if the instantaneous surge current exists, the first fuse is fused, the standby branch circuit is connected into the circuit, the power failure of a rear end electric load is avoided, the filter inductor, the filter resistor and the filter capacitor component are adopted to filter the power supply voltage of the direct current power supply, and the problem that the component is damaged by the surge current generated by electrifying is solved, the fault rate caused by misoperation is reduced, and the power supply reliability and safety of the power supply are improved.
EXAMPLE III
Fig. 4 is a schematic structural diagram of an aircraft provided by a third embodiment of the present invention. As shown in fig. 4, the aircraft 200 includes the power supply apparatus 100 described above.
In this embodiment, the aircraft 200 includes any one of an airship and an unmanned aerial vehicle.
To sum up, the aircraft provided by the embodiment of the present invention is powered by a power supply device having a surge suppression filter circuit, the surge suppression filter circuit is provided with a surge protection circuit, a filter inductor, a filter resistor and a filter capacitor assembly, the surge protection circuit comprises a first fuse and a standby branch connected in parallel with the first fuse, the standby branch comprises a second fuse and a shunt resistor assembly connected in series, a ratio value between a resistance value of the first fuse and a resistance value of the standby branch is less than 1:2, a shunt ratio value between the first fuse and the standby branch is greater than 2:1, if an instantaneous surge current exists, the first fuse is fused, the standby branch is connected to the circuit, the power failure of a rear end power load is avoided, the filter inductor, the filter resistor and the filter capacitor assembly are adopted to filter the power supply voltage of a dc power supply, and the problem that the surge current generated by power-on damages an element is solved, the fault rate caused by misoperation is reduced, and the power supply reliability and safety of the power supply are improved.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (8)
1. A surge suppression filter circuit electrically connected to a DC power supply and an electric load, respectively, comprising: the surge protection circuit, the filter inductor, the filter resistor and the filter capacitor component;
the surge protection circuit comprises a first fuse and a standby branch connected with the first fuse in parallel, the standby branch comprises a second fuse and a shunt resistor assembly which are connected in series, the ratio value between the resistance value of the first fuse and the resistance value of the standby branch is smaller than 1:2, the first end of the surge protection circuit is electrically connected with the power supply end of a power supply, the second end of the surge protection circuit is electrically connected with an electric load through the filter inductor, and a first node is arranged between the filter inductor and the electric load;
the first end of the filter resistor is electrically connected with the first node, and the second end of the filter resistor is grounded;
and the first end of the filter capacitor assembly is electrically connected with the first node, and the second end of the filter capacitor assembly is grounded.
2. The surge suppressing filter circuit of claim 1, wherein said first fuse has a first resistance value R1, said shunt resistance component has a second resistance value R2, and said first resistance value R1 and said second resistance value R2 satisfy: r2 > 10 × R1.
3. The surge suppression filter circuit according to claim 1 or 2, wherein the shunt resistance assembly includes a first shunt resistance and a second shunt resistance connected in parallel, and a resistance value of the first shunt resistance is equal to a resistance value of the second shunt resistance.
4. The surge suppression filter circuit according to claim 1 or 2, wherein said filter capacitor assembly comprises a plurality of capacitors connected in parallel, said plurality of capacitors comprising a first patch capacitor, a second patch capacitor and a third patch capacitor.
5. The surge suppressing filter circuit according to claim 1 or 2, wherein the surge protection circuit further comprises a varistor, a first terminal of the varistor being electrically connected to one terminal of the first fuse, a second terminal of the varistor being grounded.
6. The surge suppressing filter circuit according to claim 1 or 2, further comprising a first test terminal electrically connected to one end of the first fuse and a second test terminal electrically connected to one end of the second fuse, the first test terminal and the second test terminal being used for connection of a test device.
7. A power supply device characterized by comprising the surge suppressing filter circuit according to any one of claims 1 to 6.
8. An aircraft, characterized in that it comprises a power supply device according to claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022162043.3U CN212969438U (en) | 2020-09-27 | 2020-09-27 | Surge suppression filter circuit, power supply equipment and aircraft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022162043.3U CN212969438U (en) | 2020-09-27 | 2020-09-27 | Surge suppression filter circuit, power supply equipment and aircraft |
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| Publication Number | Publication Date |
|---|---|
| CN212969438U true CN212969438U (en) | 2021-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022162043.3U Active CN212969438U (en) | 2020-09-27 | 2020-09-27 | Surge suppression filter circuit, power supply equipment and aircraft |
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| CN (1) | CN212969438U (en) |
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