CN-224204983-U - Stable power supply device for airborne multispectral photoelectric system

CN224204983UCN 224204983 UCN224204983 UCN 224204983UCN-224204983-U

Abstract

The utility model relates to a stable power supply device for an airborne multispectral photoelectric system, which comprises an input filtering anti-reflection circuit, a peak surge suppression circuit, a DC-DC conversion circuit, a voltage acquisition reporting circuit and an output filtering circuit which are sequentially connected, wherein the peak surge suppression circuit comprises a normal switching stage peak loop, an input power supply switching power-on loop and an ultrahigh peak power supply loop, and the DC-DC conversion circuit comprises a first path of non-isolated output P1 and a second path of isolated output P2. The stable power supply device improves the dynamic response of the power supply, greatly improves the stability of the power supply, and improves the output precision and the anti-interference capability.

Inventors

LI SHUJUAN
LU GUANGCHAO

Assignees

西安富成智能科技有限公司

Dates

Publication Date: 20260505
Application Date: 20250417

Claims (8)

1. The stable power supply device for the airborne multispectral photoelectric system is characterized by comprising an input filtering anti-reflection circuit, a peak surge suppression circuit, a DC-DC conversion circuit, a voltage acquisition reporting circuit and an output filtering circuit which are connected in sequence; The input end of the input filtering anti-reflection circuit is connected with an external power supply, and the output end of the input filtering anti-reflection circuit is connected to the peak surge suppression circuit; The peak surge suppression circuit comprises three grade loops, and the output end of the peak surge suppression circuit is connected to the DC-DC conversion circuit; The DC-DC conversion circuit comprises a first path of non-isolated output P1 and a second path of isolated output P2, wherein main output ends of the first path of non-isolated output P1 and the second path of isolated output P2 are connected to an output filter circuit, and a feedback end is connected to a voltage acquisition reporting circuit; the input end of the voltage acquisition reporting circuit is connected in parallel with the output end of the DC-DC conversion circuit, and the voltage acquisition reporting circuit comprises a voltage dividing resistor network, an ADC chip and an MCU; the output filter circuit adopts a pi-type filter structure, and the output end of the output filter circuit is connected to a photoelectric system load.
2. The steady state power supply of claim 1 wherein the spike surge suppression circuit comprises a normal switching stage spike loop, an input power switching power up loop, and an ultra high spike power up loop; The normal switching stage peak loop comprises a first path control module, a resistor R4 and an N-channel field effect transistor Q1 connected in series with the resistor R4, wherein the first path control module comprises a resistor R1, an isolating switch U1, a diode ZD1 and a digital control module F1 which are connected in series between an input voltage VIN of the peak surge suppression circuit and a power supply ground; The input power supply switching power-on loop comprises a second path control module, a resistor R5 and an N-channel field effect transistor Q2 connected in series with the resistor R5, wherein the second path control module comprises a resistor R2, an isolating switch U2, a diode ZD2 and a digital control module F2 which are connected in series between an input voltage VIN of the peak surge suppression circuit and a power supply ground; The ultra-high peak power supply loop comprises a third control module, a resistor R6 and an N-channel field effect transistor Q3 connected with the resistor R6 in series, wherein the third control module comprises a resistor R3, an isolating switch U3, a diode ZD3 and a digital control module F3 which are connected between the input voltage VIN of the peak surge suppression circuit and the power ground in series.
3. The stable power supply device according to claim 2, wherein the digital control module F1 is a gating unit for gating voltage signals below 100V, the digital control module F2 is a gating unit for gating voltage signals between 100V and 200V, and the digital control module F3 is a gating unit for gating voltage signals above 200V.
4. The stable power supply device according to claim 1, wherein the second path isolated output P2 of the DC-DC conversion circuit includes an input filter unit, a switching power supply M1, and an output filter unit connected in sequence; The positive voltage source is characterized in that +VIN of the switching power supply M1 is connected with the shell through a capacitor C87, the-VIN of the switching power supply M1 is connected with the shell through a capacitor C98, and a resistor R100 is connected between INH and-VIN of the switching power supply M1; the input filter unit consists of a capacitor C92, a capacitor C93 and a capacitor C94 which are connected in parallel, wherein one end of the capacitor C92 is connected with the input voltage VIN of the input filter unit, and the other end is connected with the input VG of the input filter unit; The output filter unit consists of a capacitor C95, a capacitor C96 and a capacitor C97 which are connected in parallel, one end of the capacitor C97 is connected with the input positive pressure 28V & lt1+ & gt, the other end of the capacitor C97 is connected with the SGND, and the capacitor C95 and the capacitor C96 are connected with the shell through a capacitor C88 and a capacitor C99 respectively.
5. The stable power supply device according to claim 1, wherein an input voltage VIN of the input filter anti-reflection circuit is connected to a gate of an N-channel field effect transistor Q6 through a resistor R7, the N-channel field effect transistor Q6 is connected in parallel with a resistor R8, a diode ZD6 and a capacitor C10, one end of the resistor R7 is connected to the resistor R8, the other end is connected to an input positive voltage vin+ of the input filter anti-reflection circuit, the other end of the resistor R8 is connected to a power ground of the input filter anti-reflection circuit, and a drain of the N-channel field effect transistor Q6 is connected to an input VG of the input filter anti-reflection circuit.
6. The stable power supply device according to claim 1, wherein the output filter circuit comprises a capacitor C3, a capacitor C4 and a capacitor C5 which are connected in parallel, one end of the capacitor C3 is connected with an input voltage VIN of the output filter circuit, the other end of the capacitor C3 is connected with an input VG of the output filter circuit, an inductor L1 is connected in series between the capacitor C4 and the capacitor C5, an input positive voltage VIN+ of the output filter circuit is connected with a shell through the capacitor C1, and a power ground of the output filter circuit is connected with the shell through the capacitor C9.
7. The stable power supply device according to claim 1, wherein the first non-isolated output P1 of the DC-DC conversion circuit is a non-isolated output with an output following the input, the input voltage VIN of the first non-isolated output P1 is connected to VG through resistors R9 and R10 connected in series, gates of Q7, Q8, Q9 and Q10 are connected to voltage division nodes of R9 and R10, and sources and drains are connected to VG.
8. The stabilized power supply of claim 1 further comprising an aluminum alloy package.

Description

Stable power supply device for airborne multispectral photoelectric system Technical Field The utility model relates to the technical field of photoelectricity, in particular to a stable power supply device for an airborne multispectral photoelectric system. Background With the development of aviation industry, multispectral imaging equipment has wide application in the fields of aviation remote sensing, environmental monitoring, military reconnaissance and the like. Such devices typically require extremely high power supply stability, noise suppression, and reliability requirements. However, the power supply environment of the aircraft is complex, and the problems of voltage fluctuation, electromagnetic interference and the like exist, so that the normal operation of the multispectral equipment can be influenced. For example, the conventional power supply device is unreliable in suppressing surge voltage, and the power supply system has weak capability of responding to fluctuation of the previous stage input, so that loop response is slow, and thus input surge voltage cannot be adjusted in time. Moreover, the power-down maintaining function is not long enough, and when the input 28V is powered down, the output end cannot maintain the operation of the system 400W for 50ms, so that the shutdown of the later-stage system and the storage of data are directly affected. The maintenance time is short, and the later functional circuit cannot process data, so that system files are lost and the like. Disclosure of utility model Aiming at the problems in the prior art, the utility model provides a stable power supply device which is efficient, portable and reliable and faces to an airborne multispectral photoelectric system. The utility model relates to a stable power supply device for an airborne multispectral photoelectric system, which comprises an input filtering anti-reflection circuit, a peak surge suppression circuit, a DC-DC conversion circuit, a voltage acquisition reporting circuit and an output filtering circuit which are connected in sequence; The input end of the input filtering anti-reflection circuit is connected with an external power supply, and the output end of the input filtering anti-reflection circuit is connected to the peak surge suppression circuit; The peak surge suppression circuit comprises three grade loops, and the output end of the peak surge suppression circuit is connected to the DC-DC conversion circuit; The DC-DC conversion circuit comprises a first path of non-isolated output P1 and a second path of isolated output P2, wherein main output ends of the first path of non-isolated output P1 and the second path of isolated output P2 are connected to an output filter circuit, and a feedback end is connected to a voltage acquisition reporting circuit; the input end of the voltage acquisition reporting circuit is connected in parallel with the output end of the DC-DC conversion circuit, and the voltage acquisition reporting circuit comprises a voltage dividing resistor network, an ADC chip and an MCU; the output filter circuit adopts a pi-type filter structure, and the output end of the output filter circuit is connected to a photoelectric system load. Further, the peak surge suppression circuit of the stable power supply device comprises a normal switching stage peak loop, an input power supply switching power-on loop and an ultrahigh peak power supply loop; The normal switching stage peak loop comprises a first path control module, a resistor R4 and an N-channel field effect transistor Q1 connected in series with the resistor R4, wherein the first path control module comprises a resistor R1, an isolating switch U1, a diode ZD1 and a digital control module F1 which are connected in series between an input voltage VIN of the peak surge suppression circuit and a power supply ground; The input power supply switching power-on loop comprises a second path control module, a resistor R5 and an N-channel field effect transistor Q2 connected in series with the resistor R5, wherein the second path control module comprises a resistor R2, an isolating switch U2, a diode ZD2 and a digital control module F2 which are connected in series between an input voltage VIN of the peak surge suppression circuit and a power supply ground; The ultra-high peak power supply loop comprises a third control module, a resistor R6 and an N-channel field effect transistor Q3 connected with the resistor R6 in series, wherein the third control module comprises a resistor R3, an isolating switch U3, a diode ZD3 and a digital control module F3 which are connected between the input voltage VIN of the peak surge suppression circuit and the power ground in series. Further, the digital control module F1 of the stable power supply device is a gating unit for gating voltage signals below 100V, the digital control module F2 is a gating unit for gating voltage signals of 100V-200V, and the digital control module F3 is a gating unit