Filtering device

Abstract

The utility model provides a filtering device, which relates to the technical field of power supply filtering and comprises a power supply filter, and the power supply filter comprises a plurality of input filtering circuits, a power supply module U1, a power supply module U2, a power supply module U3 and a plurality of output filtering circuits. The input end of the power supply module U1, the output end of the power supply module U2 and the input end of the power supply module U3 are all connected with any input filter circuit, and the output end of the power supply module U1, the output end of the power supply module U2 and the output end of the power supply module U3 are all connected with any output filter circuit. The connection distance between the power supply module and the filter circuit is shortened through modular design, the circuit trend design is stipulated, high-quality filter devices are designed to suppress interference of each frequency band, a filter capacitor is a ceramic capacitor, and the filter range is wide. The inductor is made of an amorphous material and has the characteristics of small size, light weight, large inductance value and the like, thereby thoroughly solving the interference problem of the power supply module and enabling the power supply to output pure power to supply power to equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to power filter technical field, concretely is a kind of filter device. BACKGROUND

[0002] To improve the survivability of equipment in complex electromagnetic environment, military electronic equipment needs to meet GJB151B-2013 "military equipment and subsystem electromagnetic emission and sensitivity requirements and measurement" requirements, among which power line conducted emission CE102 and electric field radiation emission RE102 are often difficult to pass, and the main reason is that the electromagnetic interference generated by power module in the equipment exceeds the standard.

[0003] The electromagnetic interference generated by the internal power module of the existing filter device affects the power line conducted emission CE102 and electric field radiation emission RE102 project requirements in GJB151B-2013 "military equipment and subsystem electromagnetic emission and sensitivity requirements and measurement", the power filter circuit of the utility model is mainly applied to airborne multi-channel power field, and therefore provides an airborne device with self-compatibility and a filter device that can adapt to complex electromagnetic environment. UTILITY MODEL CONTENT

[0004] TECHNICAL PROBLEM SOLVED

[0005] In view of the deficiencies in the prior art, the utility model provides a filter device, which solves the problem of providing pure and electromagnetic interference-free power supply for military equipment by considering charging rate and adapter size.

[0006] TECHNICAL SCHEME

[0007] To achieve the above purpose, the utility model realizes the following technical scheme: a filter device, comprising a power filter, the power filter comprises a plurality of input filter circuits, a power module U1, a power module U2, a power module U3 and a plurality of output filter circuits.

[0008] The input end of the power module U1, the output end of the power module U2 and the input end of the power module U3 are connected with any input filter circuit, the output end of the power module U1, the output end of the power module U2 and the output end of the power module U3 are connected with any output filter circuit, the input end of a plurality of input filter circuits is connected with DC power supply, and the output end of a plurality of output filter circuits is set as filter device output end.

[0009] Preferably, the input filter circuit comprises a first common mode filter capacitor, a second common mode filter inductor and a third differential mode filter capacitor, the first common mode filter capacitor comprises common mode filter capacitors C1 and C2, common mode filter capacitors C7 and C8, common mode filter capacitors C13 and C14, the second common mode filter inductor comprises common mode filter inductors L1, L3, L5, and the third differential mode filter capacitor comprises common mode filter capacitors C3, C9, C15.

[0010] The DC power supply is input to the first end of the common mode filter capacitor C1 and the first end of the common mode filter capacitor C2 through 1Vin+ and 1Vin-, the second end of the common mode filter capacitor C1 and the second end of the common mode filter capacitor C2 are connected to the chassis ground, the DC power supply is also input to the input end of the common mode filter inductor L1 through 1Vin+ and 1Vin-, the two ends of the common mode filter capacitor C3 are respectively connected to the two ends of the output end of the common mode filter inductor L1, the output end of the common mode filter inductor L1 is respectively connected to the positive and negative input terminals of the power module U1, and the input enable terminal of the power module U1 is short-circuited together with the input negative terminal of the power module U1.

[0011] The DC power supply is input to the first end of the common mode filter capacitor C7 and the first end of the common mode filter capacitor C8 through 2Vin+ and 2Vin-, the second end of the common mode filter capacitor C7 and the second end of the common mode filter capacitor C8 are connected to the chassis ground, the DC power supply is also input to the input end of the common mode filter inductor L3 through 2Vin+ and 2Vin-, the two ends of the common mode filter capacitor C9 are respectively connected to the two ends of the output end of the common mode filter inductor L3, the output end of the common mode filter inductor L3 is respectively connected to the positive and negative input terminals of the power module U2, and the input enable terminal of the power module U2 is short-circuited together with the input negative terminal of the power module U2.

[0012] The DC power supply is input to the first end of the common mode filter capacitor C13 and the first end of the common mode filter capacitor C14 through 3Vin+ and 3Vin-, the second end of the common mode filter capacitor C13 and the second end of the common mode filter capacitor C14 are connected to the chassis ground, the DC power supply is also input to the input end of the common mode filter inductor L5 through 3Vin+ and 3Vin-, the two ends of the common mode filter capacitor C15 are respectively connected to the two ends of the output end of the common mode filter inductor L5, the output end of the common mode filter inductor L5 is respectively connected to the positive and negative input terminals of the power module U3, and the input enable terminal of the power module U3 is short-circuited together with the input negative terminal of the power module U3.

[0013] Preferably, the output filter circuit comprises a first-stage output filter capacitor, a second-stage output common-mode filter inductor, and a third-stage output differential-mode filter capacitor, the first-stage output filter capacitor comprises a common-mode filter capacitor C4, a common-mode filter capacitor C5, a common-mode filter capacitor C10, a common-mode filter capacitor C11, a common-mode filter capacitor C16, and a common-mode filter capacitor C17, the second-stage output common-mode filter inductor comprises a common-mode filter inductor L2, a common-mode filter inductor L4, and a common-mode filter inductor L6, and the third-stage output differential-mode filter capacitor comprises a common-mode filter capacitor C6, a common-mode filter capacitor C12, and a common-mode filter capacitor C18.

[0014] The first end of the common-mode filter capacitor C4 is connected to Vout+ of the power module U1 and +S of the power module U1, the first end of the common-mode filter capacitor C5 is connected to Vout- of the power module U1 and -S of the power module U1, the second end of the common-mode filter capacitor C4 and the second end of the common-mode filter capacitor C5 are connected to the chassis ground, the input end of the common-mode filter inductor L2 is connected to the first end of the common-mode filter capacitor C4 and the first end of the common-mode filter capacitor C5, the two ends of the common-mode filter capacitor C6 are connected to the output end of the common-mode filter inductor L2, and the output end of the common-mode filter inductor L2 is set as the output end 1Vout+ and 1Vout- of the filter device.

[0015] The first end of the common-mode filter capacitor C10 is connected to Vout+ of the power module U2 and +S of the power module U2, the first end of the common-mode filter capacitor C11 is connected to Vout- of the power module U2 and -S of the power module U2, the second end of the common-mode filter capacitor C10 and the second end of the common-mode filter capacitor C11 are connected to the chassis ground, the input end of the common-mode filter inductor L4 is connected to the first end of the common-mode filter capacitor C10 and the first end of the common-mode filter capacitor C11, the two ends of the common-mode filter capacitor C12 are connected to the output end of the common-mode filter inductor L4, and the output end of the common-mode filter inductor L4 is set as the output end 2Vout+ and 2Vout- of the filter device.

[0016] The first end of the common-mode filter capacitor C16 is connected to Vout+ of the power module U3 and +S of the power module U3, the first end of the common-mode filter capacitor C17 is connected to Vout- of the power module U3 and -S of the power module U3, the second end of the common-mode filter capacitor C16 and the second end of the common-mode filter capacitor C17 are connected to the chassis ground, the input end of the common-mode filter inductor L6 is connected to the first end of the common-mode filter capacitor C16 and the first end of the common-mode filter capacitor C17, the two ends of the common-mode filter capacitor C18 are connected to the output end of the common-mode filter inductor L6, and the output end of the common-mode filter inductor L6 is set as the output end 3Vout+ and 3Vout- of the filter device.

[0017] Beneficial effects

[0018] The utility model provides a filter device. Have the following beneficial effects:

[0019] In the utility model, C1 and C2, C7 and C8, C13 and C14 are mainly used for filtering the common mode interference of 10MHz-18GHz in the line, L1, L3, L5 are mainly used for filtering the common mode interference of 200KHz-100MHz in the line, C3, C9, C15 are second differential mode filter capacitors, and the differential mode capacitor design is mainly used for filtering the differential mode interference of 10KHz-500KHz in the positive and negative lines, the first stage common mode filter capacitor, the second stage common mode filter inductor and the third stage differential mode filter capacitor filter the differential mode interference gradually, and the common mode interference is filtered through the frequency characteristic combination of different devices.

[0020] In the utility model, filtering C4, C5, C10, C11, C16, C17 are first stage filter capacitors mainly used for filtering the interference of 10MHz-18GHz in the positive and negative lines in the output line, L2, L4, L6 are second stage common mode filter inductors used for filtering the interference of 200KHz-100MHz range ground power module, C6, C12, C18 are second stage filter capacitors used for the module to generate 10KHz-500KHz interference, and the multi-stage frequency division end filter power module output interference is small, and the test requirement of RE102 item in the military standard can be met.

[0021] In the utility model, the connection distance of the power module and the filter circuit is shortened through the modular design, the circuit trend design is stipulated, the high-quality filter device is designed to suppress each frequency band interference, the filter capacitor uses the ceramic capacitor, the filtering range is wide, the inductance selects the non-crystal material, the volume is small, the weight is light, the inductance is large and the like, and the interference problem of the power module is solved completely, so that the pure power output of the power supply is used for equipment power supply. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a circuit schematic diagram of the utility model kind of power filter;

[0023] Figure 2 It is a structure schematic diagram of the filter device. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without creative labor belong to the protection scope of the utility model.

[0025] As shown in the figure, according to the filter device provided by the utility model, including power filter, power filter includes several input filter circuit, power module U1, power module U2, power module U3 and several output filter circuit.

[0026] Power module U1 input, power module U2 output and power module U3 input are all connected with any input filter circuit, and the output of power module U1, power module U2 and power module U3 is all connected with any output filter circuit, the input end of the several input filter circuits is connected with DC power supply, and the output end of the several output filter circuits is set as the output end of the filter device.

[0027] The several input filter circuits comprise a first-stage common-mode filter capacitor, a second-stage common-mode filter inductor and a third-stage differential-mode filter capacitor, the first-stage common-mode filter capacitor comprises common-mode filter capacitors C1 and C2, common-mode filter capacitors C7 and C8, common-mode filter capacitors C13 and C14, the second-stage common-mode filter inductor comprises common-mode filter inductors L1, L3 and L5, and the third-stage differential-mode filter capacitor comprises common-mode filter capacitors C3, C9 and C15, wherein: 1. a DC power supply is input to the first ends of the common-mode filter capacitors C1 and C2 through 1Vin+ and 1Vin-, the second ends of the common-mode filter capacitors C1 and C2 are connected to the chassis ground, the DC power supply is also input to the input end of the common-mode filter inductor L1 through 1Vin+ and 1Vin-, the common-mode filter capacitor C3 is connected to the output end of the common-mode filter inductor L1, the output end of the common-mode filter inductor L1 is connected to the input positive and negative poles of a power module U1, and the input enable end of the power module U1 is short-circuited to the input negative pole of the power module U1; 2. a DC power supply is input to the first ends of the common-mode filter capacitors C7 and C8 through 2Vin+ and 2Vin-, the second ends of the common-mode filter capacitors C7 and C8 are connected to the chassis ground, the DC power supply is also input to the input end of the common-mode filter inductor L3 through 2Vin+ and 2Vin-, the common-mode filter capacitor C9 is connected to the output end of the common-mode filter inductor L3, the output end of the common-mode filter inductor L3 is connected to the input positive and negative poles of a power module U2, and the input enable end of the power module U2 is short-circuited to the input negative pole of the power module U2; 3. a DC power supply is input to the first ends of the common-mode filter capacitors C13 and C14 through 3Vin+ and 3Vin-, the second ends of the common-mode filter capacitors C13 and C14 are connected to the chassis ground, the DC power supply is also input to the input end of the common-mode filter inductor L5 through 3Vin+ and 3Vin-, the common-mode filter capacitor C15 is connected to the output end of the common-mode filter inductor L5, the output end of the common-mode filter inductor L5 is connected to the input positive and negative poles of a power module U3, and the input enable end of the power module U3 is short-circuited to the input negative pole of the power module U3.

[0028] As the power input end in military standard test needs to meet CE102 and RE102 low radiation design, C1 and C2, C7 and C8, C13 and C14 are mainly used to filter the common mode interference of 10MHz-18GHz in the line, L1, L3, L5 are mainly used to filter the common mode interference of 200KHz-100MHz in the line, C3, C9, C15 are the second differential mode filter capacitor, the differential mode capacitor design is mainly used to filter the differential mode interference of 10KHz-500KHz in the positive and negative lines, the first stage common mode filter capacitor, the second stage common mode filter inductor and the third stage differential mode filter capacitor filter the differential mode interference gradually, and the common mode interference is filtered through the combination and collocation of the frequency characteristics of different devices.

[0029] The several output filter circuits comprise a first-stage output filter capacitor, a second-stage output common-mode filter inductor and a third-stage output differential-mode filter capacitor, the first-stage output filter capacitor comprises a common-mode filter capacitor C4, a common-mode filter capacitor C5, a common-mode filter capacitor C10, a common-mode filter capacitor C11, a common-mode filter capacitor C16 and a common-mode filter capacitor C17, the second-stage output common-mode filter inductor comprises a common-mode filter inductor L2, a common-mode filter inductor L4 and a common-mode filter inductor L6, and the third-stage output differential-mode filter capacitor comprises a common-mode filter capacitor C6, a common-mode filter capacitor C12 and a common-mode filter capacitor C18, wherein: one, a first end of the common-mode filter capacitor C4 is connected with Vout+ of the power module U1 and +S of the power module U1 simultaneously, a first end of the common-mode filter capacitor C5 is connected with Vout- of the power module U1 and -S of the power module U1 simultaneously, a second end of the common-mode filter capacitor C4 and a second end of the common-mode filter capacitor C5 are both connected with the case ground, an input end of the common-mode filter inductor L2 is connected with the first end of the common-mode filter capacitor C4 and the first end of the common-mode filter capacitor C5 respectively, two ends of the common-mode filter capacitor C6 are connected with two ends of an output end of the common-mode filter inductor L2 respectively, and the output end of the common-mode filter inductor L2 is set as a filter device output end 1Vout+ and 1Vout-; two, a first end of the common-mode filter capacitor C10 is connected with Vout+ of the power module U2 and +S of the power module U2 simultaneously, a first end of the common-mode filter capacitor C11 is connected with Vout- of the power module U2 and -S of the power module U2 simultaneously, a second end of the common-mode filter capacitor C10 and a second end of the common-mode filter capacitor C11 are both connected with the case ground, an input end of the common-mode filter inductor L4 is connected with the first end of the common-mode filter capacitor C10 and the first end of the common-mode filter capacitor C11 respectively, two ends of the common-mode filter capacitor C12 are connected with two ends of an output end of the common-mode filter inductor L4 respectively, and the output end of the common-mode filter inductor L4 is set as a filter device output end 2Vout+ and 2Vout-; three, a first end of the common-mode filter capacitor C16 is connected with Vout+ of the power module U3 and +S of the power module U3 simultaneously, a first end of the common-mode filter capacitor C17 is connected with Vout- of the power module U3 and -S of the power module U3 simultaneously, a second end of the common-mode filter capacitor C16 and a second end of the common-mode filter capacitor C17 are both connected with the case ground, an input end of the common-mode filter inductor L6 is connected with the first end of the common-mode filter capacitor C16 and the first end of the common-mode filter capacitor C17 respectively, two ends of the common-mode filter capacitor C18 are connected with two ends of an output end of the common-mode filter inductor L6 respectively, and the output end of the common-mode filter inductor L6 is set as a filter device output end 3Vout+ and 3Vout-.

[0030] The output end needs to meet the RE102 low radiation design in military standard test, and the later stage output provides pure power supply. The filtering C4, C5, C10, C11, C16 and C17 are first stage filtering capacitors mainly used for filtering 10MHz-18GHz interference in the positive and negative lines of the output line, L2, L4 and L6 are second stage common mode filtering inductors used for filtering 200KHz-100MHz range ground power module interference, C6, C12 and C18 are second stage filtering capacitors used for the module to generate 10KHz-500KHz interference, and the multi-stage frequency division end filtering power module output interference is small, and can meet the RE102 item test requirement in the military standard.

[0031] The utility model controls the interference of power module from the interference source, shortens the connection distance of the power module and the filtering circuit through the modularization design, stipulates the circuit trend design, designs the high quality filter device to suppress each frequency band interference, the filtering capacitor uses the ceramic capacitor, the filtering range is wide, the inductance selects the non-crystal material, the volume is small, the weight is light, the inductance is large and the like characteristics completely solve the interference problem of the power module, and make the pure power supply output of the power supply to supply power for the equipment.

[0032] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A filtering device, characterized in that: It includes a power filter, which includes several input filter circuits, power module U1, power module U2, power module U3 and several output filter circuits. The input terminal of power module U1, the output terminal of power module U2, and the input terminal of power module U3 are all connected to any input filter circuit, and the output terminals of power module U1, power module U2, and power module U3 are all connected to any output filter circuit. The input terminals of several input filter circuits are connected to a DC power supply, and the output terminals of several output filter circuits are set as the output terminals of the filter device.

2. The filtering device according to claim 1, characterized in that: The input filtering circuits include a first-stage common-mode filter capacitor, a second-stage common-mode filter inductor, and a third-stage differential-mode filter capacitor. The first-stage common-mode filter capacitors include common-mode filter capacitors C1, C2, C7, C8, C13, and C14. The second-stage common-mode filter inductors include common-mode filter inductors L1, L3, and L5. The third-stage differential-mode filter capacitors include common-mode filter capacitors C3, C9, and C15. The DC power supply is input to the first terminals of common-mode filter capacitor C1 and common-mode filter capacitor C2 through 1Vin+ and 1Vin-. The second terminals of common-mode filter capacitor C1 and common-mode filter capacitor C2 are both connected to the chassis ground. The DC power supply is also input to the input terminal of common-mode filter inductor L1 through 1Vin+ and 1Vin-. The two ends of common-mode filter capacitor C3 are respectively connected to the two ends of the output terminal of common-mode filter inductor L1. The output terminal of common-mode filter inductor L1 is respectively connected to the positive and negative input terminals of power module U1. The input enable terminal of power module U1 is shorted to the negative input terminal of power module U1. The DC power supply is input to the first terminals of common-mode filter capacitor C7 and common-mode filter capacitor C8 through 2Vin+ and 2Vin-. The second terminals of common-mode filter capacitor C7 and common-mode filter capacitor C8 are both connected to the chassis ground. The DC power supply is also input to the input terminal of common-mode filter inductor L3 through 2Vin+ and 2Vin-. The two ends of common-mode filter capacitor C9 are respectively connected to the two ends of the output terminal of common-mode filter inductor L3. The output terminal of common-mode filter inductor L3 is respectively connected to the positive and negative input terminals of power module U2. The input enable terminal of power module U2 is shorted to the negative input terminal of power module U2. The DC power supply is input to the first terminals of common-mode filter capacitor C13 and common-mode filter capacitor C14 via 3Vin+ and 3Vin-. The second terminals of common-mode filter capacitor C13 and common-mode filter capacitor C14 are both connected to the chassis ground. The DC power supply is also input to the input terminal of common-mode filter inductor L5 via 3Vin+ and 3Vin-. The two ends of common-mode filter capacitor C15 are respectively connected to the two ends of the output terminal of common-mode filter inductor L5. The output terminal of common-mode filter inductor L5 is respectively connected to the positive and negative input terminals of power module U3. The input enable terminal of power module U3 is shorted to the negative input terminal of power module U3.

3. A filtering device according to claim 2, characterized in that: The aforementioned output filtering circuits include a first-stage output filtering capacitor, a second-stage output common-mode filtering inductor, and a third-stage output differential-mode filtering capacitor. The first-stage output filtering capacitor includes common-mode filtering capacitors C4, C5, C10, C11, C16, and C17. The second-stage output common-mode filtering inductor includes common-mode filtering inductor L2, L4, and L6. The third-stage output differential-mode filtering capacitor includes common-mode filtering capacitors C6, C12, and C18. The first terminal of the common-mode filter capacitor C4 is connected to both Vout+ and +S of the power module U1. The first terminal of the common-mode filter capacitor C5 is connected to both Vout- and -S of the power module U1. The second terminals of both the common-mode filter capacitor C4 and C5 are connected to the chassis ground. The input terminal of the common-mode filter inductor L2 is connected to the first terminals of the common-mode filter capacitors C4 and C5, respectively. The two terminals of the common-mode filter capacitor C6 are connected to the two output terminals of the common-mode filter inductor L2, respectively. The output terminals of the common-mode filter inductor L2 are configured as the output terminals 1Vout+ and 1Vout- of the filter device. The first terminal of the common-mode filter capacitor C10 is connected to both Vout+ and +S of the power module U2. The first terminal of the common-mode filter capacitor C11 is connected to both Vout- and -S of the power module U2. The second terminals of both the common-mode filter capacitor C10 and C11 are connected to the chassis ground. The input terminal of the common-mode filter inductor L4 is connected to the first terminals of the common-mode filter capacitors C10 and C11, respectively. The two terminals of the common-mode filter capacitor C12 are connected to the two output terminals of the common-mode filter inductor L4, respectively. The output terminals of the common-mode filter inductor L4 are configured as the output terminals 2Vout+ and 2Vout- of the filter device. The first terminal of the common-mode filter capacitor C16 is connected to both Vout+ and +S of the power module U3. The first terminal of the common-mode filter capacitor C17 is connected to both Vout- and -S of the power module U3. The second terminals of both the common-mode filter capacitor C16 and C17 are connected to the chassis ground. The input terminal of the common-mode filter inductor L6 is connected to the first terminals of the common-mode filter capacitors C16 and C17, respectively. The two terminals of the common-mode filter capacitor C18 are connected to the two output terminals of the common-mode filter inductor L6, respectively. The output terminals of the common-mode filter inductor L6 are configured as the output terminals 3Vout+ and 3Vout- of the filter device.

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