CN-224204977-U - Alternating current power supply filter for network equipment of military machine room

CN224204977UCN 224204977 UCN224204977 UCN 224204977UCN-224204977-U

Abstract

The utility model provides an alternating current power supply filter of network equipment of a military machine room, which relates to the technical field of power adapters and comprises a filter circuit, wherein the filter circuit comprises a differential mode filter circuit, a first-stage common mode filter circuit and a second-stage common mode filter circuit, the input end of the filter circuit is set as a power input end, the power input end is respectively set as a zero line and a fire line, and the differential mode filter circuit, the first-stage common mode filter circuit and the second-stage common mode filter circuit are sequentially connected to the power input end. The differential mode filter circuit, the first-stage common mode filter circuit and the second-stage common mode filter circuit are used for filtering differential mode interference and common mode interference in a circuit, the switch installation and the filter circuit are all installed in independent cavities, mutual coupling interference can be effectively avoided between the cavities independently, and the aluminum alloy shell delta-shaped socket is adopted through the power input end, so that the circuit can be quickly plugged and unplugged, and has good filtering efficiency.

Inventors

MA JUNHONG
CHEN LONG
HE GUOJI
YANG DAWEI

Assignees

中科汇安科技成都有限公司

Dates

Publication Date: 20260505
Application Date: 20250407

Claims (5)

1. The alternating current power supply filter for the network equipment of the military machine room is characterized by comprising a filter circuit, wherein the filter circuit comprises a differential mode filter circuit, a first-stage common mode filter circuit and a second-stage common mode filter circuit; The filter circuit input sets up to the power input, the power input sets up to zero line and live wire respectively, differential mode filter circuit, first level common mode filter circuit and second level common mode filter circuit connect gradually to the power input, all be provided with the switch between differential mode filter circuit input and the zero line, between differential mode filter circuit input and the live wire, the switch is installed in independent cavity, filter circuit installs in independent cavity.
2. The alternating current power supply filter for network equipment of a military machine room according to claim 1, wherein the differential mode filter circuit comprises a differential mode inductance L1, a differential mode capacitance CX1, a common mode capacitance CY1 and a common mode capacitance CY2, and wherein: The live wire input end is connected in series with a differential mode inductance L1, and the differential mode capacitance CX1 is connected in parallel to a circuit.
3. The alternating current power supply filter for network equipment of a military machine room according to claim 2, wherein the first-stage common-mode filter circuit comprises a common-mode filter inductor L2, a common-mode filter capacitor CY1 and a common-mode filter capacitor CY2; One end of the common mode filter capacitor CY1 is connected to the live wire in parallel, the other end of the common mode filter capacitor CY1 is connected with the ground of the shell, one end of the common mode filter capacitor CY2 is connected to the zero line in parallel, the other end of the common mode filter capacitor CY2 is connected with the ground of the shell, and the input end of the common mode filter inductor L2 is connected with one end of the differential mode inductor L1 and one end of the live wire respectively.
4. The alternating current power supply filter for network equipment of a military machine room according to claim 3, wherein the second-stage common-mode filter circuit comprises a common-mode filter inductor L3, a common-mode filter capacitor CY3 and a common-mode filter capacitor CY4; One end of the common mode filter capacitor CY3 is connected to the live wire in parallel, the other end of the common mode filter capacitor CY3 is connected with the ground of the shell, one end of the common mode filter capacitor CY4 is connected to the zero line of the circuit in parallel, the other end of the common mode filter capacitor CY4 is connected with the ground of the shell, and the input end of the common mode filter inductor L3 is connected with one end of the differential mode inductor L2 and one end of the live wire respectively.
5. The alternating current power supply filter for network equipment of a military machine room, as set forth in claim 4, wherein the power input end is an I-shaped socket, and the housing is an aluminum alloy housing.

Description

Alternating current power supply filter for network equipment of military machine room Technical Field The utility model relates to the technical field of power adapters, in particular to an alternating current power supply filter for network equipment of a military machine room. Background The requirement of GJB 151B-2013 on electromagnetic emission and sensitivity requirements and measurement of military equipment and subsystem is required to be met by military network equipment. Because the I-shaped socket is adopted and has no electromagnetic shielding and filtering functions, the test requirements in GJB 151B-2013 cannot be met, and the power supply module alternating current power supply filter of the military network equipment, which makes full use of the structural shielding characteristic to enable the filtering circuit to achieve the optimal effect, is developed by our company according to the electromagnetic and structural characteristics of the alternating current power supply filter. Disclosure of utility model (One) solving the technical problems Aiming at the defects of the prior art, the utility model provides an alternating current power supply filter for network equipment of a military machine room, which solves the problem that the existing power supply filter adopts a delta-shaped socket without electromagnetic shielding and filtering functions and cannot meet the test requirements in GJB 151B-2013. (II) technical scheme The alternating current power supply filter for the network equipment of the military machine room comprises a filter circuit, wherein the filter circuit comprises a differential mode filter circuit, a first-stage common mode filter circuit and a second-stage common mode filter circuit. The input end of the filter circuit is set as a power input end, the power input end is respectively set as a zero line and a fire wire, and the differential mode filter circuit, the first-stage common mode filter circuit and the second-stage common mode filter circuit are sequentially connected to the power input end. Preferably, the differential mode filter circuit includes a differential mode inductance L1, a differential mode capacitance CX1, a common mode capacitance CY1, and a common mode capacitance CY2, wherein: The live wire input end is connected in series with a differential mode inductance L1, and the differential mode capacitance CX1 is connected in parallel to a circuit. Preferably, the first stage common mode filter circuit includes a common mode filter inductance L2, a common mode filter capacitance CY1 and a common mode filter capacitance CY2. One end of the common mode filter capacitor CY1 is connected to the live wire in parallel, the other end of the common mode filter capacitor CY1 is connected with the ground of the shell, one end of the common mode filter capacitor CY2 is connected to the zero line in parallel, the other end of the common mode filter capacitor CY2 is connected with the ground of the shell, and the input end of the common mode filter inductor L2 is connected with one end of the differential mode inductor L1 and one end of the live wire respectively. Preferably, the second stage common mode filter circuit includes a common mode filter inductance L3, a common mode filter capacitance CY3, and a common mode filter capacitance CY4. One end of the common mode filter capacitor CY3 is connected to the live wire in parallel, the other end of the common mode filter capacitor CY3 is connected with the ground of the shell, one end of the common mode filter capacitor CY4 is connected to the zero line of the circuit in parallel, the other end of the common mode filter capacitor CY4 is connected with the ground of the shell, and the input end of the common mode filter inductor L3 is connected with one end of the differential mode inductor L2 and one end of the live wire respectively. Preferably, switches are arranged between the input end of the differential mode filter circuit and the zero line and between the input end of the differential mode filter circuit and the live line, the switches are arranged in independent cavities, and the filter circuit is arranged in the independent cavities. Preferably, the power input end is input by adopting a character-shape socket, and the shell is an aluminum alloy shell. (III) beneficial effects The utility model provides an alternating current power supply filter for network equipment of a military machine room. The beneficial effects are as follows: 1. In the utility model, the differential mode capacitor CX1 is a differential mode filter capacitor, the differential mode inductor L1 is a differential mode filter inductor, and the differential mode capacitor is mainly used for filtering out the differential mode interference of 10KHz-500KHz in a circuit. 2. In the utility model, the common mode filter capacitor CY1, the common mode filter capacitor CY2, the common mode filter capacitor CY3 and the common mode filter capacito