CN101788620B

CN101788620B - Line impedance stabilization network for medium-frequency power supply and design method thereof

Info

Publication number: CN101788620B
Application number: CN 200910312968
Authority: CN
Inventors: 邱扬; 张勃
Original assignee: Xi'an Kairong Electronic Technologies Co Ltd
Current assignee: Xi'an Kairong Electronic Technologies Co Ltd
Priority date: 2009-12-31
Filing date: 2009-12-31
Publication date: 2013-07-03
Anticipated expiration: 2029-12-31
Also published as: CN101788620A

Abstract

The invention provides a line impedance stabilization network for a medium-frequency power supply, which is used for testing the electromagnetic compatibility and belongs to the technical field of electronic testing and measuring. Meanwhile, the invention further provides a design method for the line impedance stabilization network. The line impedance stabilization network is characterized in that: the line impedance stabilization network comprises a bottom cover, a shell, an output-end wire connecting post, an input-end wire connecting post, a signal port, a grounding terminal and the line impedance stabilization network; the line impedance stabilization network is fixed in a shell body formed by the bottom cover and the shell, the input end and the output end of the line impedance stabilization network are electrically connected with the output-end wire connecting post and the input-end wire connecting post at the two sides of the shell body, and one side of the output-end wire connecting post of the shell body is fixedly connected with the signal port and the grounding terminal. The provided line impedance stabilization network for the medium-frequency power supply can be used in a commercial power grid (50Hz/60Hz and 115V/400Hz) for a long term.

Description

The line impedance stabilization net work and the method for designing thereof that are used for intermediate frequency power supply

Technical field

The invention belongs to Electronic Testing and field of measuring technique, is a kind of line impedance stabilization net work and method for designing thereof of being used for intermediate frequency power supply for emc testing.

Background technology

At present, fast development along with modern electronic technology, the electronic equipment Electro Magnetic Compatibility seems more and more important, must need a kind of line impedance stabilization net work as the electromagnetic compatibility laboratory when carrying out electromagnetic compatibility test, its stability is to determine receiver to measure the key factor of electromagnetic interference (EMI) accuracy.At present, the linear impedance stabilization network that the electromagnetic compatibility laboratory adopts the 50Hz/60Hz power frequency supply to use mostly, when it is worked under the 115V/4000Hz intermediate frequency power supply, the power consumption of 5 Ω resistance is much larger than 10W, under the long-term work situation, 5 Ω resistance are damaged, cause the impedance operator of stabilizing network seriously overproof, the final EMI test result that obtains mistake.

Summary of the invention

The object of the present invention is to provide a kind of long-term work is used for intermediate frequency power supply at city electrical network 50Hz/60Hz and 115V/400Hz line impedance stabilization net work and method for designing thereof that can be used for.

For achieving the above object, technical scheme of the present invention is: the line impedance stabilization net work and the method for designing thereof that are used for intermediate frequency power supply, it is characterized in that: comprise bottom, shell, output end binding post, input end binding post, signal port, ground terminal and line impedance stabilization net work, line impedance stabilization net work is fixed in the housing of bottom and shell formation, the line impedance stabilization net work input end is electrically connected the fixedly connected signal port of output end binding post one side and the ground terminal of housing with output terminal with output end binding post, the input end binding post of housing both sides.

Described line impedance stabilization net work is made up of an inductance L 1 and two RC series circuits, one of two RC series circuits at the network input end, one at network output, L1 is the 50uH inductance, be connected on input end binding post and the output end binding post, the input of inductance L 1, output terminal and input end binding post and output end binding post are fixed with nut, network input end RC series circuit is made up of 8uF electric capacity and 5 Ω/40W resistance, 8uF condenser welding fishplate bar and 5 Ω/40W electricity assembly welding fishplate bar is electrically connected by the M3 screw, be parallel to again between input wires terminal and the shell, 5 Ω/40W electric resistance welding fishplate bar is fixed on ground connection on the shell by the M3 screw, 8uF electric capacity is connected with the input wires terminal by Φ 10.5 holes on the welded plate, fixes by nut; Network output RC series circuit is made up of 0.282uF electric capacity and 1k Ω resistance, 0.282uF electric capacity and 1k Ω resistance are by weldering cup, 1k Ω resistance one end wire bonds on 0.282uF condenser welding fishplate bar one end φ 2 circular holes, the signal port BNC connector, be parallel to again between output wiring terminal and the shell, another wire bonds of 1k Ω resistance is on ground terminal, 0.282uF electric capacity is connected with output wiring terminal by Φ 10.5 holes on the welded plate, fixes by nut.

Described shell is the thick steel plate of 2mm, and surfaces externally and internally is zinc-plated, and outside surface sprays paint again, and bottom is the aluminium sheet of the thick surface conduction oxidation of 3mm.

Described 50uH inductance is to wrap the air core inductor that flat copper belt forms in Φ 115 Φ 120 * 240 expoxy glass stringing coilings by silk, with 4 stent support, is fixed on the shell with the screw of M6 * 30.

Described 8uF electric capacity is to be welded on two welded plates by the metallic film 105 electric capacity parallel connections that 8 rated voltages are the 310VAC lead type, and welded plate one end is beaten φ 3 circular holes, and another welded plate one end is beaten φ 10.5 circular holes.

Described 5 Ω/40W resistance is to be welded on two welded plates by 20 lead type 100 Ω/2W carbon resister parallel connection, and welded plate one end is beaten φ 3 circular holes, and two φ 3.5 * 5.5 strip holes are made a call at another welded plate two ends.

The CBB473 electric capacity parallel connection that described 0.282uF electric capacity is the 275VAC lead type by 6 rated voltages is welded on two welded plates, and welded plate one end is beaten φ 10.5 circular holes, and another welded plate one end is beaten φ 2 circular holes.

Described 1k Ω resistance is lead type 1k Ω/2W carbon resister.

Advantage of the present invention is: under city electrical network 50Hz/60Hz and any one Power Supplies Condition of 115V/400Hz intermediate frequency power supply during long-term work, can steady operation, and make receiver obtain test result accurately.

Description of drawings

Content of the present invention illustrates further with the following Examples, but content of the present invention is not limited only to content related among the embodiment.

Fig. 1 is embodiment of the invention circuit theory diagrams;

Fig. 2 is embodiment of the invention profile synoptic diagram.

Among the figure: 1, bottom; 2, shell; 3, output end binding post; 4, signal port; 5, ground terminal; 6, input end binding post; 7, line impedance stabilization net work.

Embodiment

As shown in Figure 1 and Figure 2, the line impedance stabilization net work that is used for intermediate frequency power supply, it is characterized in that: comprise bottom 2, shell 1, output end binding post 3, input end binding post 6, signal port 4, ground terminal 5 and line impedance stabilization net work 7, line impedance stabilization net work 7 is fixed in the housing of bottom 2 and shell 1 formation, line impedance stabilization net work 7 input ends are electrically connected with output end binding post 3, the input end binding post 6 of housing both sides with output terminal, the fixedly connected signal port 4 of output end binding post 3 one sides and the ground terminal 5 of housing.Line impedance stabilization net work 7 is made up of an inductance L 1 and two RC series circuits, L1 is the 50uH inductance, be connected on input end binding post 6 and the output end binding post 3, the input of inductance L 1, output terminal and lead-in clamp 6 and output end binding post 3 usefulness nuts are fixed, one of two RC series circuits at the network input end, one at network output, network input end RC series circuit is made up of 8uF electric capacity and 5 Ω/40W resistance, 8uF condenser welding fishplate bar and 5 Ω/40W electricity assembly welding fishplate bar is electrically connected by the M3 screw, be parallel to again between input wires terminal and the shell, 5 Ω/40W electric resistance welding fishplate bar is fixed on ground connection on the shell by the M3 screw, 8uF electric capacity is connected with the input wires terminal by Φ 10.5 holes on the welded plate, fixes by nut; Network output RC series circuit is made up of 0.282uF electric capacity and 1k Ω resistance, 0.282uF electric capacity and 1k Ω resistance are by weldering cup, 1k Ω resistance one end wire bonds on 0.282uF condenser welding fishplate bar one end φ 2 circular holes, the signal port BNC connector, be parallel to again between output wiring terminal and the shell, another wire bonds of 1k Ω resistance is on ground terminal, 0.282uF electric capacity is connected with output wiring terminal by Φ 10.5 holes on the welded plate, fixes by nut.

Shell is the thick steel plate of 2mm, and surfaces externally and internally is zinc-plated, and outside surface sprays paint again, and bottom is the aluminium sheet of the thick surface conduction oxidation of 3mm.Input, output wiring terminal are the M10 copper studs, and signal port is the BNC head that send the flanged dish of undesired signal to install to receiver.

The 50uH inductance is to wrap the air core inductor that flat copper belt forms in Φ 115 Φ 120 * 240 expoxy glass stringing coilings by silk, with 4 stent support, is fixed on the shell with the screw of M6 * 30, and input, output terminal lead-in wire respectively weld a 100A wiring weld tabs.8uF electric capacity is to be welded on two welded plates by the metallic film 105 electric capacity parallel connections that 8 rated voltages are the 310VAC lead type, and welded plate one end is beaten φ 3 circular holes, and another welded plate one end is beaten φ 10.5 circular holes.5 Ω/40W resistance is to be welded on two welded plates by 20 lead type 100 Ω/2W carbon resister parallel connection, and welded plate one end is beaten φ 3 circular holes, and two φ 3.5 * 5.5 strip holes are made a call at another welded plate two ends; 0.282uF the CBB473 electric capacity parallel connection that electric capacity is the 275VAC lead type by 6 rated voltages is welded on two welded plates, welded plate one end is beaten φ 10.5 circular holes, and another welded plate one end is beaten φ 2 circular holes; 1k Ω resistance is lead type 1k Ω/2W carbon resister; Ground terminal is that the screw of φ 6 is welded on the shell; 5 Ω/40W resistance and 8uF electric capacity are spirally connected by φ 3 circular holes on the welded plate separately and are composed in series stable impedance unit; The welded plate that 5 Ω/40W resistance is made a call to two φ 3.5 * 5.5 strip holes is resistance eutral grounding end (connecing shell); 0.282uF electric capacity and 1k Ω resistance are by weldering cup, 1k Ω resistance one end wire bonds on 0.282uF condenser welding fishplate bar one end φ 2 circular holes, the BNC connector, 0.282uF electric capacity and 1k Ω resistance are composed in series coupling electromagnetic interference (EMI) unit, another wire bonds of 1k Ω resistance is on ground terminal.Stablizing impedance unit during use is connected with 50uH inductance input end; Coupling electromagnetic interference (EMI) unit is connected with the 50uH inductance output end.

Claims

1. the line impedance stabilization net work that is used for intermediate frequency power supply, it is characterized in that: comprise bottom (2), shell (1), output end binding post (3), input end binding post (6), signal port (4), ground terminal (5) and line impedance stabilization net work (7), line impedance stabilization net work (7) is fixed in the housing of bottom (2) and shell (1) formation, line impedance stabilization net work (7) input end is electrically connected the output end binding post fixedly connected signal ports of (3) one sides (4) of housing and ground terminal (5) with output terminal with output end binding post (3) the input end binding post (6) of housing both sides; Described line impedance stabilization net work (7) is made up of an inductance L 1 and two RC series circuits, one of two RC series circuits at the network input end, one at network output, L1 is the 50uH inductance, be connected on input end binding post (6) and the output end binding post (3), the input of inductance L 1, output terminal and input end binding post (6) and output end binding post (3) are fixed with nut, network input end RC series circuit is made up of 8uF electric capacity and 5 Ω/40W resistance, 8uF condenser welding fishplate bar and 5 Ω/40W electricity assembly welding fishplate bar is electrically connected by the M3 screw, be parallel to again between input wires terminal and the shell (1), 5 Ω/40W electric resistance welding fishplate bar is fixed on shell (1) by the M3 screw and goes up ground connection, 8uF electric capacity is connected with the input wires terminal by Φ 10.5 holes on the welded plate, fixes by nut; Network output RC series circuit is made up of 0.282uF electric capacity and 1k Ω resistance, 0.282uF electric capacity and 1k Ω resistance are by weldering cup, 1k Ω resistance one end wire bonds on 0.282uF condenser welding fishplate bar one end φ 2 circular holes, the signal port BNC connector, be parallel to again between output wiring terminal and the shell, another wire bonds of 1k Ω resistance is on ground terminal, 0.282uF electric capacity is connected with output wiring terminal by Φ 10.5 holes on the welded plate, fixes by nut; Described 50uH inductance is to wrap the air core inductor that flat copper belt forms in Φ 115 Φ 120 * 240 expoxy glass stringing coilings by silk, with 4 stent support, is fixed on the shell with the screw of M6 * 30; Described 8uF electric capacity is to be welded on two welded plates by the metallic film 105 electric capacity parallel connections that 8 rated voltages are the 310VAC lead type, and welded plate one end is beaten φ 3 circular holes, and another welded plate one end is beaten φ 10.5 circular holes; Described 5 Ω/40W resistance is to be welded on two welded plates by 20 lead type 100 Ω/2W carbon resister parallel connection, and welded plate one end is beaten φ 3 circular holes, and two φ 3.5 * 5.5 strip holes are made a call at another welded plate two ends; The CBB473 electric capacity parallel connection that described 0.282uF electric capacity is the 275VAC lead type by 6 rated voltages is welded on two welded plates, and welded plate one end is beaten φ 10.5 circular holes, and another welded plate one end is beaten φ 2 circular holes; Described 1k Ω resistance is lead type 1k Ω/2W carbon resister; The shell of stating (1) is the thick steel plate of 2mm, and surfaces externally and internally is zinc-plated, and outside surface sprays paint again; Described bottom (2) is the aluminium sheet of the thick surface conduction oxidation of 3mm.