CN218213237U - Integrated military standard LISN system suitable for alternating current single-phase or direct current power supply - Google Patents
Integrated military standard LISN system suitable for alternating current single-phase or direct current power supply Download PDFInfo
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Abstract
The utility model relates to the field of circuit testing, and discloses an integrated military standard LISN system suitable for AC single-phase or DC power supply, which comprises a first LISN circuit, a first measuring circuit, a second LISN circuit and a second measuring circuit; the first LISN circuit comprises a capacitor C2 and a resistor R2, and the output end of the capacitor C2 is electrically connected with one end of the resistor R2; the second LISN circuit comprises a capacitor C4 and a resistor R6, and an output end of the capacitor C4 is electrically connected with one end of the resistor R6; the input end of the first measuring circuit is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the input end of the second measuring circuit is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the utility model provides a prior art can't distinguish differential mode and common mode radiation to exchanging single-phase or DC supply type and carry out the problem tested, and have simple structure, characteristics of easy to use.
Description
Technical Field
The utility model relates to a circuit test field, more specifically relates to an integration army mark LISN system suitable for exchange single-phase or DC power supply.
Background
LISN, a line impedance stabilization network, is an important auxiliary device in electromagnetic compatibility testing in electrical power systems. It can isolate the electric wave interference, provide stable test impedance, and play the role of filtering.
The GJB151 series standard (comprising GJB151A-97, GJB152A-97 and GJB 151B-2013) prescribes electromagnetic emission and sensitivity requirements and test methods for military electronic, electrical and electromechanical equipment and subsystems, and comprises 21 requirements in four categories of conduction emission, conduction sensitivity, radiation emission and radiation sensitivity, and provides corresponding test methods. The standard is an electromagnetic compatibility basic standard universal for the three military, is suitable for demonstration, design, production, test and ordering of military equipment and subsystems, and provides an electromagnetic compatibility design and acceptance basis for development and ordering units.
Most test items in the standard require the use of LISN to isolate power supply interference and provide a specified power supply impedance for EUT. The LISN is one of the essential devices for basic configuration of electromagnetic compatibility tests of munitions.
At present, military standard LISN meeting the requirements of MIL-STD-461/GJB151 standard is produced and sold by a plurality of foreign manufacturers, such as Solar, schwarzbeck and the like, and domestic manufacturers also have related LISN equipment, such as 3Ctest. At present, the domestic and overseas LISN is configured according to standard requirements, and internal devices and functions of the LISN only meet the requirements of the standard for the LISN.
At present, the LISN is a single-wire independent LISN and can meet the standardized detection requirement. However, for the CE102 and RE102 projects, "differential mode" and "common mode" radiation cannot be distinguished, and especially when the emission of the test article exceeds the standard and requires rectification, the existing LISN scheme can only provide "differential mode + common mode" overall data, and cannot accurately adopt the "differential mode" and "common mode" distinguishing rectification scheme, which is not favorable for the targeted protection design of the test article.
At present, the LISN is a single-wire independent LISN and can meet the standardized detection requirement. However, for CE102 and RE102 projects, "differential mode" and "common mode" radiation cannot be distinguished, and especially when emission of a test article exceeds standard and requires rectification, the existing LISN scheme can only provide "differential mode + common mode" overall data, and cannot accurately adopt a "differential mode" and "common mode" distinguishing rectification scheme, which is not favorable for targeted protection design of the test article.
Therefore, how to invent an LISN system capable of distinguishing differential mode radiation from common mode radiation for an alternating current single-phase or direct current power supply type is a problem to be solved urgently in the technical field.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art and can't distinguish the problem that differential mode and common mode radiation carried out the test to exchanging single-phase or DC supply type, provide an integration army's mark LISN system suitable for exchanging single-phase or DC supply, it has simple structure, characteristics easy to use.
In order to realize the above, the utility model discloses the purpose, the technical scheme of adoption as follows:
the utility model provides a mark LISN system is planned to integration army suitable for exchange single-phase or DC power supply which characterized in that: the device comprises a first LISN circuit, a first measuring circuit, a second LISN circuit and a second measuring circuit; the first LISN circuit comprises a capacitor C2 and a resistor R2, and the output end of the capacitor C2 is electrically connected with one end of the resistor R2; the second LISN circuit comprises a capacitor C4 and a resistor R6, and an output end of the capacitor C4 is electrically connected with one end of the resistor R6; the input end of the first measuring circuit is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the input end of the second measuring circuit is electrically connected with the output end of the capacitor C4 and one end of the resistor R6;
the first measuring circuit comprises switches S1, S3, S5 and S6, change-over switches S2 and S4, resistors R3 and R4 and a transformer T1; s2 and S4 are both provided with 2 input ends and 1 output end; the second measuring circuit comprises switches S7, S8, S9 and S11, a change-over switch S10, resistors R7 and R8 and a transformer T2; s10 comprises 2 input ends and 4 output ends;
the input end of the S1 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S1 is electrically connected with the first input end of the S2; the output end of the S2 is electrically connected with the first input end of the S4; s4, electrically connecting the output end with the measurement port; the input end of the S3 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S3 is electrically connected with one end of the R3 and the first input end of the T1 respectively; the input end of the S5 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S5 is electrically connected with one end of the R4; the other end of the R4 is electrically connected with the input end of the S6; the output end of the S6 is electrically connected with the other end of the R3 and the second input end of the T1 respectively; the first output end of the T1 is electrically connected with the second input end of the S4; the second output end of the T1 is electrically connected with the first output end of the T2;
the input end of the S7 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S7 is electrically connected with the second input end of the S2; the input end of the S9 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S9 is electrically connected with one end of the R7 and the first input end of the S10 respectively; the input end of the S8 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S8 is electrically connected with one end of the R8; the other end of the R8 is electrically connected with the input end of the S11; the output end of the S11 is electrically connected with the other end of the R7 and the second input end of the S10 respectively; a first output end of the first input end of the S10 is electrically connected with a first input end of the T2 and a second output end of the second input end of the S10 respectively; a second output end of the first input end of the S10 is electrically connected with a second input end of the T2 and a first output end of the second input end of the S10 respectively; the second output terminal of T2 is grounded.
Preferably, the first LISN circuit further includes an inductor L1, a capacitor C1, and a resistor R1; the input end of the inductor L1 is electrically connected with the positive power supply and the input end of the inductor C1 respectively; the output end of the L1 is electrically connected with the input ends of the positive EUT and the positive EUT 2 respectively; the output end of the C1 is electrically connected with one end of the R1; the other ends of R1 and R2 are grounded.
Further, the second LISN circuit further includes an inductor L2, a capacitor C3, and a resistor R5; the input end of the inductor L2 is electrically connected with the negative power supply and the input end of the inductor C3 respectively; the output end of the L2 is electrically connected with the input ends of the negative EUT and the C4 respectively; the output end of the C3 is electrically connected with one end of the R5; the other ends of R5 and R6 are grounded.
Further, the other ends of the resistors R4 and R8 are grounded.
Further, L1 and L2 are both 50 μ H inductors.
Further, R1 and R5 are both 5 ohm resistors.
Further, R2 and R6 are both 1K ohm resistors.
Further, R4 and R8 are both 50 ohm resistors.
Further, T1 and T2 are both voltage transformers 1:1.
Furthermore, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10 and S11 can be switched by mechanical manual switching or PLC program control.
The beneficial effects of the utility model are as follows:
the utility model discloses a on the basis of current LISN circuit, designed first test circuit and second test circuit, made LISN circuit can satisfy the standardized test of exchanging single-phase or DC supply EUT, be applicable to "difference mode" component test and "common mode" component test of conduction radiation harassment simultaneously. The utility model provides a prior art can't distinguish differential mode and common mode radiation to exchanging single-phase or DC supply type and carry out the problem tested, and have simple structure, characteristics of easy to use.
Drawings
Fig. 1 is a schematic circuit diagram of an integrated military standard LISN system suitable for ac single-phase or dc power supply of the present invention.
Fig. 2 is a first LISN circuit diagram of an integrated military standard LISN system suitable for ac single-phase or dc power supply.
Fig. 3 is an application schematic diagram of the integrated military standard LISN system of the present invention suitable for ac single-phase or dc power supply.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1, an integrated military standard LISN system suitable for ac single-phase or dc power supply includes a first LISN circuit, a first measuring circuit, a second LISN circuit, and a second measuring circuit; the first LISN circuit comprises a capacitor C2 and a resistor R2, and the output end of the capacitor C2 is electrically connected with one end of the resistor R2; the second LISN circuit comprises a capacitor C4 and a resistor R6, and an output end of the capacitor C4 is electrically connected with one end of the resistor R6; the input end of the first measuring circuit is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the input end of the second measuring circuit is electrically connected with the output end of the capacitor C4 and one end of the resistor R6;
the first measuring circuit comprises switches S1, S3, S5 and S6, change-over switches S2 and S4, resistors R3 and R4 and a transformer T1; s2 and S4 are both provided with 2 input ends and 1 output end; the second measuring circuit comprises switches S7, S8, S9 and S11, a change-over switch S10, resistors R7 and R8 and a transformer T2; s10 comprises 2 input ends and 4 output ends;
the input end of the S1 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S1 is electrically connected with the first input end of the S2; the output end of the S2 is electrically connected with the first input end of the S4; s4, electrically connecting the output end with the measurement port; the input end of the S3 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S3 is electrically connected with one end of the R3 and the first input end of the T1 respectively; the input end of the S5 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S5 is electrically connected with one end of the R4; the other end of the R4 is electrically connected with the input end of the S6; the output end of the S6 is electrically connected with the other end of the R3 and the second input end of the T1 respectively; the first output end of the T1 is electrically connected with the second input end of the S4; the second output end of the T1 is electrically connected with the first output end of the T2;
the input end of the S7 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S7 is electrically connected with the second input end of the S2; the input end of the S9 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S9 is electrically connected with one end of the R7 and the first input end of the S10 respectively; the input end of the S8 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S8 is electrically connected with one end of the R8; the other end of the R8 is electrically connected with the input end of the S11; the output end of the S11 is electrically connected with the other end of the R7 and the second input end of the S10 respectively; a first output end of the first input end of the S10 is electrically connected with a first input end of the T2 and a second output end of the second input end of the S10 respectively; a second output end of the first input end of the S10 is electrically connected with a second input end of the T2 and a first output end of the second input end of the S10 respectively; the second output terminal of T2 is grounded.
Example 2
As shown in fig. 1, an integrated military standard LISN system suitable for ac single-phase or dc power supply includes a first LISN circuit, a first measurement circuit, a second LISN circuit, and a second measurement circuit; the first LISN circuit comprises a capacitor C2 and a resistor R2, and the output end of the capacitor C2 is electrically connected with one end of the resistor R2; the second LISN circuit comprises a capacitor C4 and a resistor R6, and an output end of the capacitor C4 is electrically connected with one end of the resistor R6; the input end of the first measuring circuit is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the input end of the second measuring circuit is electrically connected with the output end of the capacitor C4 and one end of the resistor R6;
the first measuring circuit comprises switches S1, S3, S5 and S6, change-over switches S2 and S4, resistors R3 and R4 and a transformer T1; s2 and S4 are both provided with 2 input ends and 1 output end; the second measuring circuit comprises switches S7, S8, S9 and S11, a change-over switch S10, resistors R7 and R8 and a transformer T2; s10 comprises 2 input ends and 4 output ends;
the input end of the S1 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S1 is electrically connected with the first input end of the S2; the output end of the S2 is electrically connected with the first input end of the S4; s4, electrically connecting the output end with the measurement port; the input end of the S3 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S3 is electrically connected with one end of the R3 and the first input end of the T1 respectively; the input end of the S5 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S5 is electrically connected with one end of the R4; the other end of the R4 is electrically connected with the input end of the S6; the output end of the S6 is electrically connected with the other end of the R3 and the second input end of the T1 respectively; the first output end of the T1 is electrically connected with the second input end of the S4; the second output end of the T1 is electrically connected with the first output end of the T2;
the input end of the S7 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S7 is electrically connected with the second input end of the S2; the input end of the S9 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S9 is electrically connected with one end of the R7 and the first input end of the S10 respectively; the input end of the S8 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S8 is electrically connected with one end of the R8; the other end of the R8 is electrically connected with the input end of the S11; the output end of the S11 is electrically connected with the other end of the R7 and the second input end of the S10 respectively; a first output end of the first input end of the S10 is electrically connected with a first input end of the T2 and a second output end of the second input end of the S10 respectively; a second output end of the first input end of the S10 is electrically connected with a second input end of the T2 and a first output end of the second input end of the S10 respectively; the second output terminal of T2 is grounded.
In a specific embodiment, as shown in fig. 2, the first LISN circuit further includes an inductor L1, a capacitor C1, and a resistor R1; the input end of the inductor L1 is electrically connected with the positive power supply and the input end of the inductor C1 respectively; the output end of the L1 is electrically connected with the input ends of the positive EUT and the positive EUT 2 respectively; the output end of the C1 is electrically connected with one end of the R1; the other ends of R1 and R2 are grounded.
In a specific embodiment, the second LISN circuit further includes an inductor L2, a capacitor C3, and a resistor R5; the input end of the inductor L2 is electrically connected with the negative power supply and the input end of the inductor C3 respectively; the output end of the L2 is electrically connected with the input ends of the negative EUT and the C4 respectively; the output end of the C3 is electrically connected with one end of the R5; the other ends of R5 and R6 are grounded.
In one embodiment, the other ends of resistors R4 and R8 are connected to ground.
In one embodiment, L1 and L2 are both 50 μ H inductors.
In one embodiment, R1 and R5 are both 5 ohm resistors.
In one embodiment, R2 and R6 are both 1K ohm resistors.
In one particular embodiment, R4 and R8 are each 50 ohm resistors.
In one particular embodiment, T1 and T2 are both voltage transformers 1:1.
In one embodiment, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11 can be switched by mechanical manual switching or PLC program control.
Example 3
As shown in fig. 1, an integrated military standard LISN system suitable for ac single-phase or dc power supply includes a first LISN circuit, a first measuring circuit, a second LISN circuit, and a second measuring circuit; the first LISN circuit comprises a capacitor C2 and a resistor R2, and the output end of the capacitor C2 is electrically connected with one end of the resistor R2; the second LISN circuit comprises a capacitor C4 and a resistor R6, and an output end of the capacitor C4 is electrically connected with one end of the resistor R6; the input end of the first measuring circuit is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the input end of the second measuring circuit is electrically connected with the output end of the capacitor C4 and one end of the resistor R6;
the first measuring circuit comprises switches S1, S3, S5 and S6, change-over switches S2 and S4, resistors R3 and R4 and a transformer T1; s2 and S4 are both provided with 2 input ends and 1 output end; the second measuring circuit comprises switches S7, S8, S9 and S11, a change-over switch S10, resistors R7 and R8 and a transformer T2; s10 comprises 2 input ends and 4 output ends;
the input end of the S1 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S1 is electrically connected with the first input end of the S2; the output end of the S2 is electrically connected with the first input end of the S4; the output end of the S4 is electrically connected with the measuring port; the input end of the S3 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S3 is electrically connected with one end of the R3 and the first input end of the T1 respectively; the input end of the S5 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S5 is electrically connected with one end of the R4; the other end of the R4 is electrically connected with the input end of the S6; the output end of the S6 is electrically connected with the other end of the R3 and the second input end of the T1 respectively; the first output end of the T1 is electrically connected with the second input end of the S4; the second output end of the T1 is electrically connected with the first output end of the T2;
the input end of the S7 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S7 is electrically connected with the second input end of the S2; the input end of the S9 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S9 is electrically connected with one end of the R7 and the first input end of the S10 respectively; the input end of the S8 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S8 is electrically connected with one end of the R8; the other end of the R8 is electrically connected with the input end of the S11; the output end of the S11 is electrically connected with the other end of the R7 and the second input end of the S10 respectively; a first output end of the first input end of the S10 is electrically connected with a first input end of the T2 and a second output end of the second input end of the S10 respectively; a second output end of the first input end of the S10 is electrically connected with a second input end of the T2 and a first output end of the second input end of the S10 respectively; the second output terminal of T2 is grounded.
In a specific embodiment, the first LISN circuit further includes an inductor L1, a capacitor C1, and a resistor R1; the input end of the inductor L1 is electrically connected with the positive power supply and the input end of the inductor C1 respectively; the output end of the L1 is electrically connected with the input ends of the positive EUT and the positive EUT 2 respectively; the output end of the C1 is electrically connected with one end of the R1; the other ends of R1 and R2 are grounded.
In a specific embodiment, the second LISN circuit further includes an inductor L2, a capacitor C3, and a resistor R5; the input end of the inductor L2 is electrically connected with the negative power supply and the input end of the inductor C3 respectively; the output end of the L2 is electrically connected with the input ends of the negative EUT and the C4 respectively; the output end of the C3 is electrically connected with one end of the R5; the other ends of R5 and R6 are grounded.
In one embodiment, the other ends of resistors R4 and R8 are connected to ground.
In one embodiment, L1 and L2 are both 50 μ H inductors.
In one embodiment, R1 and R5 are both 5 ohm resistors.
In one embodiment, R2 and R6 are both 1K ohm resistors.
In one particular embodiment, R4 and R8 are each 50 ohm resistors.
In one particular embodiment, T1 and T2 are both voltage transformers 1:1.
In one embodiment, S1, S2, S3, S4, S5, S6, S7, S8, S9, S10, S11 can be switched by mechanical manual switching or PLC program control.
As shown in fig. 3, in the present embodiment, the first LISN circuit and the second LISN circuit are electrically connected to the positive electrode and the negative electrode of the power supply respectively during the test; the first LISN circuit and the second LISN circuit are also respectively connected with the anode and the cathode of the tested device.
In this embodiment, as shown in the following table, the utility model discloses can standardize CE102 test under alternating current is single-phase or DC supply, the utility model discloses can also be used to "difference mode" component test and "common mode" component test that the conduction radiation harass, in the table, put "last" expert and be change over switch intercommunication first input end, put "down" expert and be change over switch intercommunication second input end, put "1" expert and be change over switch's first input and second input and link to each other rather than first output respectively, put "2" expert and be change over switch's first input and second input respectively rather than the second output and link to each other:
the utility model discloses a on the basis of current LISN circuit, designed first test circuit and second test circuit, made LISN circuit can satisfy the standardized test of exchanging single-phase or DC supply EUT, be applicable to "difference mode" component test and "common mode" component test of conduction radiation harassment simultaneously. The utility model provides a prior art can't distinguish differential mode and common mode radiation to exchanging single-phase or DC supply type and carry out the problem tested, and have simple structure, the characteristics of easy to use.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a mark LISN system is planned to integration army suitable for exchange single-phase or DC power supply which characterized in that: the device comprises a first LISN circuit, a first measuring circuit, a second LISN circuit and a second measuring circuit; the first LISN circuit comprises a capacitor C2 and a resistor R2, and the output end of the capacitor C2 is electrically connected with one end of the resistor R2; the second LISN circuit comprises a capacitor C4 and a resistor R6, and an output end of the capacitor C4 is electrically connected with one end of the resistor R6; the input end of the first measuring circuit is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the input end of the second measuring circuit is electrically connected with the output end of the capacitor C4 and one end of the resistor R6;
the first measuring circuit comprises switches S1, S3, S5 and S6, change-over switches S2 and S4, resistors R3 and R4 and a transformer T1; s2 and S4 are both provided with 2 input ends and 1 output end; the second measuring circuit comprises switches S7, S8, S9 and S11, a change-over switch S10, resistors R7 and R8 and a transformer T2; s10 comprises 2 input ends, and the 2 input ends are respectively connected with two output ends;
the input end of the S1 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S1 is electrically connected with the first input end of the S2; the output end of the S2 is electrically connected with the first input end of the S4; s4, electrically connecting the output end with the measurement port; the input end of the S3 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S3 is electrically connected with one end of the R3 and the first input end of the T1 respectively; the input end of the S5 is electrically connected with the output end of the capacitor C2 and one end of the resistor R2; the output end of the S5 is electrically connected with one end of the R4; the other end of the R4 is electrically connected with the input end of the S6; the output end of the S6 is electrically connected with the other end of the R3 and the second input end of the T1 respectively; the first output end of the T1 is electrically connected with the second input end of the S4; the second output end of the T1 is electrically connected with the first output end of the T2;
the input end of the S7 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S7 is electrically connected with the second input end of the S2; the input end of the S9 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S9 is electrically connected with one end of the R7 and the first input end of the S10 respectively; the input end of the S8 is electrically connected with the output end of the capacitor C4 and one end of the resistor R6; the output end of the S8 is electrically connected with one end of the R8; the other end of the R8 is electrically connected with the input end of the S11; the output end of the S11 is electrically connected with the other end of the R7 and the second input end of the S10 respectively; a first output end of the first input end of the S10 is electrically connected with a first input end of the T2 and a second output end of the second input end of the S10 respectively; a second output end of the first input end of the S10 is electrically connected with a second input end of the T2 and a first output end of the second input end of the S10 respectively; the second output terminal of T2 is grounded.
2. The integrated military standard LISN system suitable for single-phase ac or dc power supply according to claim 1, wherein: the first LISN circuit further comprises an inductor L1, a capacitor C1 and a resistor R1; the input end of the inductor L1 is electrically connected with the positive power supply and the input end of the inductor C1 respectively; the output end of the L1 is electrically connected with the input ends of the positive EUT and the positive EUT 2 respectively; the output end of the C1 is electrically connected with one end of the R1; the other ends of R1 and R2 are grounded.
3. The integrated military standard LISN system suitable for ac single-phase or dc power supply according to claim 1, wherein: the second LISN circuit further comprises an inductor L2, a capacitor C3 and a resistor R5; the input end of the inductor L2 is electrically connected with the negative power supply and the input end of the inductor C3 respectively; the output end of the L2 is electrically connected with the input ends of the negative EUT and the C4 respectively; the output end of the C3 is electrically connected with one end of the R5; the other ends of R5 and R6 are grounded.
4. The integrated military standard LISN system suitable for single-phase ac or dc power supply according to claim 1, wherein: the other ends of the resistors R4 and R8 are grounded.
5. The integrated military standard LISN system suitable for single-phase ac or dc power supply according to claim 2, wherein: l1 and L2 are both 50 muH inductors.
6. The integrated military standard LISN system suitable for single-phase ac or dc power supply according to claim 2, wherein: r1 and R5 are both 5 ohm resistors.
7. The integrated military standard LISN system suitable for single-phase ac or dc power supply according to claim 2, wherein: r2 and R6 are both 1K ohm resistors.
8. The integrated military standard LISN system suitable for single-phase ac or dc power supply according to claim 2, wherein: r4 and R8 are both 50 ohm resistors.
9. The integrated military standard LISN system suitable for single-phase ac or dc power supply according to claim 2, wherein: t1 and T2 are both voltage transformers 1:1.
10. The integrated military standard LISN system suitable for single-phase ac or dc power supply according to claim 1, wherein: s1, S2, S3, S4, S5, S6, S7, S8, S9, S10 and S11 can be switched by mechanical manual switching or PLC program control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222328081.0U CN218213237U (en) | 2022-08-31 | 2022-08-31 | Integrated military standard LISN system suitable for alternating current single-phase or direct current power supply |
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| CN202222328081.0U CN218213237U (en) | 2022-08-31 | 2022-08-31 | Integrated military standard LISN system suitable for alternating current single-phase or direct current power supply |
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