CN213125843U - Voltage conversion circuit with noise suppression function, power supply equipment and aircraft - Google Patents
Voltage conversion circuit with noise suppression function, power supply equipment and aircraft Download PDFInfo
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- CN213125843U CN213125843U CN202022161864.5U CN202022161864U CN213125843U CN 213125843 U CN213125843 U CN 213125843U CN 202022161864 U CN202022161864 U CN 202022161864U CN 213125843 U CN213125843 U CN 213125843U
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Abstract
The utility model discloses a voltage conversion circuit, power supply unit and aircraft with noise suppression function, this circuit includes first magnetic bead and second magnetic bead, and first magnetic bead and second magnetic bead are used for suppressing the noise in the voltage conversion circuit; the first magnetic beads are arranged between the power supply end of the power supply and the voltage conversion chip; the second magnetic bead is arranged between the voltage conversion chip and the electric load, a first node is arranged between the voltage conversion chip and the first magnetic bead, a second node is arranged between the voltage conversion chip and the second magnetic bead, and the voltage conversion chip is used for converting the first voltage provided by the power supply end of the power supply into a second voltage; the first end of the first filtering unit is electrically connected with the first node, the second end of the first filtering unit is grounded, and the first filtering unit is used for filtering the voltage of the input end; the first end of the filter is electrically connected with the second node, the second end of the filter is grounded, and the filter is used for filtering the voltage of the output end. The utility model discloses a set up the conduction noise among two magnetic bead suppression circuits, improve output voltage stability.
Description
Technical Field
The utility model relates to a voltage conversion technical field especially relates to a voltage conversion circuit, power supply unit and aircraft with noise suppression function.
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, a control system of an aircraft for the field of meteorological monitoring has a large number of low-voltage power loads with specific rated voltage, the existing aircraft mainly outputs specific voltage through a low-dropout linear voltage regulator to realize load power supply, and the control system of the aircraft has the defects that a large number of capacitive and inductive loads exist, a large number of high-frequency noises can be generated in the starting process of a power supply, the power supply stability is poor, and meanwhile, the high-frequency noises can influence the signal transmission quality.
SUMMERY OF THE UTILITY MODEL
The utility model provides a voltage conversion circuit with noise suppression function can realize the high frequency noise among the suppression circuit, has solved the problem of low voltage supply network power supply poor stability.
In a first aspect, an embodiment of the present invention provides a voltage converting circuit with noise suppression function, including: the voltage conversion circuit comprises a voltage conversion chip, a first filtering unit, a second filtering unit, a first magnetic bead and a second magnetic bead, wherein the first magnetic bead and the second magnetic bead are used for suppressing noise in the voltage conversion circuit; the first end of the first magnetic bead is electrically connected with the power supply end of a power supply, and the second end of the first magnetic bead is electrically connected with the input end of the voltage conversion chip; the output end of the voltage conversion chip is electrically connected with the first end of the second magnetic bead, the second end of the second magnetic bead is electrically connected with an electric load, a first node is arranged between the voltage conversion chip and the first magnetic bead, a second node is arranged between the voltage conversion chip and the second magnetic bead, and the voltage conversion chip is used for converting the first voltage provided by the power supply end into a second voltage; the first end of the first filtering unit is electrically connected with the first node, the second end of the first filtering unit is grounded, and the first filtering unit is used for filtering the voltage of the input end of the voltage conversion chip; and the first end of the second filtering unit is electrically connected with the second node, the second end of the second filtering unit is grounded, and the second filtering unit is used for filtering the voltage at the output end of the voltage conversion chip.
Optionally, the voltage conversion chip includes a TPS79301 power chip, and the TPS79301 power chip is configured to convert a +5V dc voltage into a +1.2V dc voltage.
Optionally, the voltage conversion chip is provided with an enable pin EN, an output voltage regulation pin FB, a bypass pin NR, and a ground terminal VSS, and the enable pin EN is electrically connected to the second end of the first magnetic bead; the output voltage regulation pin FB is electrically connected with a first end of the second magnetic bead; the bypass pin NR is grounded through a bypass capacitor; the ground terminal VSS is directly grounded.
Optionally, the first filtering unit includes a first capacitor, a second capacitor and a third capacitor connected in parallel, a capacitance value of the first capacitor is greater than a capacitance value of the second capacitor, and a capacitance value of the second capacitor is greater than a capacitance value of the third capacitor.
Optionally, the second filtering unit includes a fourth capacitor and a fifth capacitor connected in parallel, and a capacitance value of the fourth capacitor is greater than a capacitance value of the fifth capacitor.
Optionally, the voltage conversion circuit with a noise suppression function further includes: the surge suppression 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 which are connected in series, and the ratio of the resistance value of the first fuse to the resistance value of the standby branch circuit is smaller than 1: 2.
Optionally, the first fuse has a first resistance value R1, the shunt resistor has a second resistance value R2, and the first resistance value R1 and the second resistance value R2 satisfy: r2 > 10 × R1.
In a second aspect, the embodiment of the present invention further provides a power supply device, which includes the above voltage converting circuit with noise suppression function.
In a third aspect, the embodiment of the present invention further provides an aircraft, including the above power supply device.
The embodiment of the utility model provides a voltage transformation circuit, power supply unit and aircraft with noise suppression function, this voltage transformation circuit sets up voltage transformation chip, first filter unit, second filter unit, first magnetic bead and second magnetic bead, first magnetic bead sets up between voltage transformation chip's input and power supply end, the second magnetic bead sets up between voltage transformation chip's output and power consumption load, first magnetic bead and second magnetic bead are arranged in suppressing the high frequency noise in the voltage transformation circuit, adopt first filter unit to carry out filtering process to voltage transformation chip's input voltage; the second filtering unit is adopted to filter the voltage at the output end of the voltage conversion chip, and the input and output voltages are filtered by setting the conduction noise in the two magnetic bead suppression circuits and by setting the two-stage filtering units, so that the stability of the output voltage is improved.
Drawings
Fig. 1 is a schematic structural diagram of a voltage converting circuit with noise suppression function according to a first embodiment of the present invention;
fig. 2 is a schematic structural diagram of another voltage converting 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 a schematic structural diagram of a voltage converting circuit with noise suppression function according to an embodiment of the present invention, which is applicable to an application scenario for supplying power to a low-voltage dc power load in an aircraft.
As shown in fig. 1, a voltage conversion circuit 1 having a noise suppression function includes: the voltage conversion circuit comprises a voltage conversion chip 10, a first filtering unit 20, a second filtering unit 30, a first magnetic bead 40 and a second magnetic bead 50, wherein the first magnetic bead 40 and the second magnetic bead 50 are used for suppressing noise in the voltage conversion circuit; a first end of the first magnetic bead 40 is electrically connected with a power supply end of the power supply, and a second end of the first magnetic bead 40 is electrically connected with an input end VIN of the voltage conversion chip 10; an output end OUT of the voltage conversion chip 10 is electrically connected with a first end of a second magnetic bead 50, a second end of the second magnetic bead 50 is electrically connected with an electric load, a first node is arranged between the voltage conversion chip 10 and the first magnetic bead 40, a second node is arranged between the voltage conversion chip 10 and the second magnetic bead 50, and the voltage conversion chip 10 is used for converting a first voltage provided by a power supply end into a second voltage; a first end of the first filtering unit 20 is electrically connected to the first node, a second end of the first filtering unit 20 is grounded, and the first filtering unit 20 is configured to filter the voltage at the input end of the voltage converting chip 10; a first end of the second filtering unit 30 is electrically connected to the second node, a second end of the second filtering unit 30 is grounded, and the second filtering unit 30 is configured to filter the voltage at the output end of the voltage converting chip 10.
In this embodiment, the power supply terminal may be an output terminal of a dc power supply or an output terminal of a previous stage dc voltage converter, and the power supply terminal is configured to provide a dc power supply voltage, where a voltage value of the dc power supply voltage is equal to the first voltage.
In the embodiment, the first magnetic bead 40 and the second magnetic bead 50 may be MLCB-type laminated stone ferrite magnetic beads, which can effectively suppress electromagnetic or radio frequency interference noise in a wide frequency band.
For example, the first magnetic bead 40 and the second magnetic bead 50 may be stacked ferrite beads of model MLCB2B 1608-601B.
Specifically, after power-on, the first magnetic bead 40 performs noise suppression processing on the dc power supply voltage provided by the power supply terminal, the first filtering unit 20 performs filtering processing on the dc power supply voltage provided by the power supply terminal and outputs the processed dc power supply voltage to the voltage conversion chip 10, the voltage conversion chip 10 converts the first voltage into a second voltage, performs output filtering processing through the second filtering unit 30 and transmits the output terminal voltage to the second magnetic bead 50, the second magnetic bead 50 performs noise suppression processing on the output terminal voltage and transmits the processed output terminal voltage to the electric load in the circuit, and the rated operating voltage of the electric load is equal to the second voltage.
The embodiment of the utility model provides a voltage transformation circuit, power supply unit and aircraft with noise suppression function, this voltage transformation circuit sets up voltage transformation chip, first filter unit, second filter unit, first magnetic bead and second magnetic bead, first magnetic bead sets up between voltage transformation chip's input and power supply end, the second magnetic bead sets up between voltage transformation chip's output and power consumption load, first magnetic bead and second magnetic bead are arranged in suppressing the high frequency noise in the voltage transformation circuit, adopt first filter unit to carry out filtering process to voltage transformation chip's input voltage; the second filtering unit is adopted to filter the voltage at the output end of the voltage conversion chip, and the input and output voltages are filtered by setting the conduction noise in the two magnetic bead suppression circuits and by setting the two-stage filtering units, so that the stability of the output voltage is improved.
Optionally, the voltage conversion chip 10 includes a TPS79301 power chip, and the TPS79301 power chip is configured to convert a +5V dc voltage into a +1.2V dc voltage.
The TPS79301 power chip has the characteristics of high power supply rejection ratio, ultralow noise and quick start, and can effectively improve the output quality of the voltage conversion circuit 1.
Optionally, referring to fig. 1, the voltage conversion chip 10 is provided with an enable pin EN, an output voltage regulation pin FB, a bypass pin NR, and a ground terminal VSS, where the enable pin EN is electrically connected to the second end of the first magnetic bead 40; the output voltage regulation pin FB is electrically connected to a first end of the second magnetic bead 50; the bypass pin NR is grounded through a bypass capacitor C10; the ground terminal VSS is directly grounded.
The enable pin EN is connected to a power supply end through a first magnetic bead 40, and the voltage conversion chip 10 starts to work after the system is powered on; the output voltage regulation pin FB is electrically connected with the output end OUT of the voltage conversion chip 10, and regulates the voltage at the output end of the voltage conversion chip 10 through feeding back the monitoring voltage; those skilled in the art can determine the specific capacitance value of the bypass capacitor C10 by calculating circuit parameters and referring to the instruction manual of the TPS79301 power chip, which is not described herein.
With reference to fig. 1, the first filter unit 20 includes a first capacitor C1, a second capacitor C2, and a third capacitor C3 connected in parallel, wherein a capacitance of the first capacitor C1 is greater than a capacitance of the second capacitor C2, and a capacitance of the second capacitor C2 is greater than a capacitance of the third capacitor C3.
The first capacitor C1, the second capacitor C2, and the third capacitor C3 may be implemented by chip capacitors, the chip capacitors are nonpolar capacitors, and the withstand voltages of the first capacitor C1, the second capacitor C2, and the third capacitor C3 are all greater than the first voltage provided by the power supply terminal.
For example, the capacitance value of the first capacitor C1 may be equal to 5.6uF, the capacitance value of the second capacitor C2 may be equal to 0.1uF, and the capacitance value of the third capacitor C3 may be equal to 0.01 uF.
Optionally, the second filtering unit 30 includes a fourth capacitor C4 and a fifth capacitor C5 connected in parallel, and a capacitance value of the fourth capacitor C4 is greater than a capacitance value of the fifth capacitor C5.
The fourth capacitor C4 and the fifth capacitor C5 may be chip capacitors, and the withstand voltages of the fourth capacitor C4 and the fifth capacitor C5 are both greater than the second voltage output by the voltage conversion chip 10.
For example, the capacitance value of the fourth capacitor C4 may be equal to 2.2uF, and the capacitance value of the fifth capacitor C5 may be equal to 0.01uF, and the filtering effect of the filtering unit may be improved by connecting a plurality of capacitors with different capacitance values in parallel.
Fig. 2 is a schematic structural diagram of another voltage converting circuit according to an embodiment of the present invention.
Alternatively, referring to fig. 2, the voltage conversion circuit 1 having the noise suppression function further includes: the surge suppression circuit 60 is characterized in that the input end of the surge suppression circuit 60 is electrically connected with the power supply end of a power supply, the output end of the surge suppression circuit 60 is electrically connected with the first end of the first magnetic bead 40, the surge suppression circuit 60 comprises a first fuse F1 and a standby branch circuit connected with the first fuse F1 in parallel, the standby branch circuit comprises a second fuse F2 and a shunt resistor R which are connected in series, and 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 fuse F1 and the second fuse F2 can adopt fuse wires with the same model and specification, the front end of the second fuse F2 is connected in series with a shunt resistor R to form an unbalanced parallel structure, when the voltage conversion circuit is normally used, current mainly passes through the first fuse F1, if the input current of a power supply is overlarge due to misoperation, the first fuse F1 is heated and disconnected, a standby branch is connected into the circuit, and power is normally supplied to a power 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.
Optionally, the first fuse F1 has a first resistance value R1, the shunt resistor R 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 resistance value of the shunt resistor R can be set to be 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.
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 apparatus 100 includes the above-described voltage conversion circuit 1 having the noise suppression function.
In this embodiment, the power supply device 100 may further include another voltage conversion circuit connected in parallel or in series with the voltage conversion circuit 1 having the noise suppression function, so as to achieve the purpose of adapting to the electrical loads with different rated operating voltages.
Therefore, the embodiment of the utility model provides a power supply device sets up the voltage transformation circuit that has the noise suppression function, and this voltage transformation circuit sets up voltage transformation chip, first filter unit, second filter unit, first magnetic bead and second magnetic bead, and first magnetic bead sets up between the input of voltage transformation chip and power supply end, and the second magnetic bead sets up between the output of voltage transformation chip and power consumption load, and first magnetic bead and second magnetic bead are used for suppressing the high frequency noise in the voltage transformation circuit, adopt first filter unit to carry out filtering process to the input voltage of voltage transformation chip; the second filtering unit is adopted to filter the voltage at the output end of the voltage conversion chip, the conducted noise in the two magnetic bead suppression circuits is set, and the two-stage filtering unit is arranged to filter the input and output voltages, so that the stability of the output voltage is improved, and the power supply quality of a load is improved.
EXAMPLE III
Fig. 4 is a schematic structural diagram of an aircraft provided by a third embodiment of the present invention. Referring to 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 embodiment of the present invention provides an aircraft, which is provided with a voltage conversion circuit having a noise suppression function, the voltage conversion circuit is provided with a voltage conversion chip, a first filter unit, a second filter unit, a first magnetic bead and a second magnetic bead, the first magnetic bead is disposed between an input end of the voltage conversion chip and a power supply end, the second magnetic bead is disposed between an output end of the voltage conversion chip and an electrical load, the first magnetic bead and the second magnetic bead are used for suppressing high frequency noise in the voltage conversion circuit, and the first filter unit performs filtering processing on an input end voltage of the voltage conversion chip; the second filtering unit carries out filtering processing on the voltage of the output end of the voltage conversion chip, conducting noise in the two magnetic bead suppression circuits is set, and filtering processing is carried out on the input voltage and the output voltage through the two-stage filtering unit, so that the stability of the output voltage is improved, and the power supply quality of a load is 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 (9)
1. A voltage conversion circuit having a noise suppression function, comprising: the voltage conversion circuit comprises a voltage conversion chip, a first filtering unit, a second filtering unit, a first magnetic bead and a second magnetic bead, wherein the first magnetic bead and the second magnetic bead are used for suppressing noise in the voltage conversion circuit;
the first end of the first magnetic bead is electrically connected with the power supply end of a power supply, and the second end of the first magnetic bead is electrically connected with the input end of the voltage conversion chip;
the output end of the voltage conversion chip is electrically connected with the first end of the second magnetic bead, the second end of the second magnetic bead is electrically connected with an electric load, a first node is arranged between the voltage conversion chip and the first magnetic bead, a second node is arranged between the voltage conversion chip and the second magnetic bead, and the voltage conversion chip is used for converting the first voltage provided by the power supply end into a second voltage;
the first end of the first filtering unit is electrically connected with the first node, the second end of the first filtering unit is grounded, and the first filtering unit is used for filtering the voltage of the input end of the voltage conversion chip;
and the first end of the second filtering unit is electrically connected with the second node, the second end of the second filtering unit is grounded, and the second filtering unit is used for filtering the voltage at the output end of the voltage conversion chip.
2. The voltage conversion circuit with noise suppression function according to claim 1, wherein the voltage conversion chip comprises a TPS79301 power supply chip, and the TPS79301 power supply chip is configured to convert a +5V dc voltage into a +1.2V dc voltage.
3. The voltage conversion circuit with noise suppression function of claim 2, wherein the voltage conversion chip is provided with an enable pin, an output voltage regulation pin, a bypass pin and a ground terminal, and the enable pin is electrically connected to the second end of the first magnetic bead; the output voltage adjusting pin is electrically connected with the first end of the second magnetic bead; the bypass pin is grounded through a bypass capacitor; the ground terminal is directly grounded.
4. The voltage conversion circuit with noise suppression function according to any one of claims 1 to 3, wherein the first filtering unit includes a first capacitor, a second capacitor and a third capacitor connected in parallel, a capacitance value of the first capacitor is greater than a capacitance value of the second capacitor, and a capacitance value of the second capacitor is greater than a capacitance value of the third capacitor.
5. The voltage conversion circuit with noise suppression function according to any one of claims 1 to 3, wherein the second filtering unit includes a fourth capacitor and a fifth capacitor connected in parallel, and a capacitance value of the fourth capacitor is greater than a capacitance value of the fifth capacitor.
6. The voltage conversion circuit having a noise suppression function according to any one of claims 1 to 3, characterized by further comprising: the surge suppression 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 which are connected in series, and the ratio of the resistance value of the first fuse to the resistance value of the standby branch circuit is smaller than 1: 2.
7. The voltage conversion circuit with noise suppression function according to claim 6, wherein the first fuse has a first resistance value R1, the shunt resistor has a second resistance value R2, and the first resistance value R1 and the second resistance value R2 satisfy: r2 > 10 × R1.
8. A power supply device characterized by comprising the voltage conversion circuit having a noise suppression function according to any one of claims 1 to 7.
9. An aircraft, characterized in that it comprises a power supply device according to claim 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022161864.5U CN213125843U (en) | 2020-09-27 | 2020-09-27 | Voltage conversion circuit with noise suppression function, power supply equipment and aircraft |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022161864.5U CN213125843U (en) | 2020-09-27 | 2020-09-27 | Voltage conversion circuit with noise suppression function, power supply equipment and aircraft |
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| CN213125843U true CN213125843U (en) | 2021-05-04 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257079A (en) * | 2021-12-23 | 2022-03-29 | 无锡睿勤科技有限公司 | Power utilization equipment and power supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114257079A (en) * | 2021-12-23 | 2022-03-29 | 无锡睿勤科技有限公司 | Power utilization equipment and power supply system |
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