CN203038681U - Low-inductance flat cable - Google Patents

Abstract

The utility model relates to a large-capacity storage and launching cable. The technical problem to be solved is to provide a flat cable to solve the technical problem of small size and low inductance requirement during the use of the cable, aiming at the problem that the structure size of the existing cable is relatively large. It is characterized in that: the conductor structure of the cable consists of four layers of flat copper foil layers arranged in parallel in sequence: flat copper foil layer I (2), flat copper foil layer II (4), flat copper foil layer III (6), It is composed of flat copper foil layer IV (8). Both ends of the cable are provided with two conductor lead-out ends formed by a through-hole staggered connection structure. The utility model utilizes the principle of differential mode mutual inductance, adopts flat conductors to be layered and misconnected to reduce cable inductance, uses polyimide film with stable electrical performance as insulation, and uses molding production technology to produce a low-inductance flat cable, which can increase The conductor section of the large cable meets the high voltage requirements of the cable at the same time, so that the cable can meet the requirements of low inductance and high pulse current in a limited use space.

Description

A low inductance flat cable

technical field

The utility model relates to cables, in particular to a special cable for large-capacity storage and launch used in special occasions with high voltage, small structure and low inductance.

Background technique

In the application of high voltage and low inductance, as the inductance decreases, the withstand voltage performance of the cable will be affected. Therefore, in this special application, the performance requirements of the cable products are very high. Currently used The solution is to adopt a coaxial structure, and the conductor adopts a braided structure to meet the technical requirements of the cable conductor DC resistance and low inductance, but this often leads to a larger structural size of the cable. the

Utility model content

The technical problem to be solved by the utility model is to apply the differential mode mutual inductance technology to the cable design, adopt the flat cable structure, and use the fixed-length molding technology to meet the shortcomings of the existing technology; Under the premise, at the same time meet the technical requirements of the small size of the cable structure. the

For solving the problems of the technologies described above, the technical solution of the utility model is:

A low-inductance flat cable, which is composed of a plurality of flat conductors arranged in parallel, a film insulation layer is provided between the flat conductors, and the outer layer of the cable is covered with a film for insulation, and the overall structure is formed by lamination molding; It is characterized in that: the conductor structure of the cable is composed of four layers of flat copper foil layers arranged in parallel in sequence: flat copper foil layer I2, flat copper foil layer II4, flat copper foil layer III6, and flat copper foil layer IV8. Both are provided with two conductor lead-out ends formed by a through-hole staggered connection structure;

The two conductor lead-out ends provided at both ends of the cable are formed by the following through-hole staggered connection structure: on both ends of the cable, the flat copper foil layer I2 and the flat copper foil layer III6 are at the same position There are three through-holes on each, and through-hole connections are made to form a conductor lead-out; the flat copper foil layer II4 and the flat copper-foil layer IV8 are each provided with three through-holes at the same position, and through-hole connections are made to form another A conductor terminal.

All flat copper foil layers are gold-plated within 20mm of the ends. the

The two conductor lead-out ends of one of the two ends of the cable are respectively provided with a connecting column. the

The utility model can bring the following beneficial effects:

The utility model utilizes the principle of differential mode mutual inductance, adopts flat conductors to be layered and misconnected to reduce cable inductance, uses polyimide film with stable electrical performance as insulation, and uses molding production technology to produce a low-inductance flat cable, which can increase The conductor section of the large cable meets the high voltage requirements of the cable at the same time, so that the cable can meet the requirements of low inductance and high pulse current in a limited use space.

Description of drawings

Fig. 1: the schematic diagram of cable structure of a preferred embodiment of the present utility model

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail. the

See Figure 1, 1 is the insulating film layer, 2 is the flat copper foil layer I, 3 is the insulating film layer, 4 is the flat copper foil layer II, 5 is the insulating film layer, 6 is the flat copper foil layer III, and 7 is the insulating film Layer, 8 is the flat copper foil layer IV, 9 is the insulating film layer, a is the terminal, and b is the gold-plated layer. As shown in the figure, at both ends of the cable, the flat copper foil layer I2 and the flat copper foil layer III6 are respectively provided with three through holes at the same position, and are connected through the holes to form a conductor lead-out respectively; Ⅱ4 and flat copper foil layer Ⅳ8 are respectively provided with three through holes at the same position, and are connected through the holes to form another conductor lead-out end; the conductor lead-out end is used for welding connectors, and all flat copper foil layers are 20mm away from the end Within the range, gold-plated treatment is carried out to facilitate welding and prevent oxidation at the same time. the

The manufacturing process of this preferred embodiment is as follows:

1. Carry out plate-making according to the structure of the cable design, and then etch the copper foil according to the plate-making. The thickness of the copper foil is selected within the thickness range of 0.03mm~0.05mm according to the requirements of the conductor resistance, and the width is determined according to the drawing design.

2. According to the withstand voltage requirements of the cable, a polyimide film with a certain thickness is selected as the insulating layer. Layer molding, flat copper foil layer Ⅰ2 and insulating layer 3 are molded into one to form a structural semi-finished layer (I), flat copper foil layer Ⅱ4 and insulating layer 5 are molded into one to form a structural semi-finished layer (Ⅱ), flat copper foil layer Ⅲ6 and insulating Layer 7 and flat copper foil layer IV 8 are molded into one piece to form structural semi-finished layer (III). the

3. For three different structural semi-finished products, carry out gold-plating treatment on the ends respectively, that is, within the distance range of 20mm from the end of the lead-out end, carry out gold-plating treatment on the conductor, and then place the structural semi-finished product layer (Ⅰ), structural semi-finished product layer ( Ⅱ), Structural semi-finished product layer (Ⅲ) The three structural semi-finished product layers are laminated and molded, and the via connection processing between copper foil layer Ⅰ2 and copper foil layer Ⅱ6, copper foil layer Ⅲ4 and copper foil layer Ⅳ8 is carried out at the same time. the

4. Mold the insulating film 1, 9 to the outermost layer, pressurize while heating, thereby forming the cable as a whole, and finally cut and shape according to the length; the thickness of the bonding layer during the bonding process is 0.01mm~0.2 mm. the

Claims (3)

1. one kind low inductance flat cable, it constitutes many flat conductors is arranged in parallel, and is provided with thin dielectric film between strap, adopts the film coated insulation at cable outer layer, and overall structure is that stacked mold pressing forms; It is characterized in that: the conductor structure of described cable is by four layers of flat copper foil layer that are arranged in parallel successively: namely flat copper foil layer I (2), flat copper foil layer II (4), flat copper foil layer III (6), flat copper foil layer IV (8) constitute, and described cable two is equipped with two conductor exits that adopt through hole staggered floor syndeton to form;

Two conductor exits that described cable two is equipped with are that the through hole staggered floor syndeton by the following stated forms: on two of described cable, flat copper foil layer I (2) and flat copper foil layer III (6) respectively are provided with three through holes on same position, and carry out the via hole connection, form a conductor exit; Flat copper foil layer II (4) and flat copper foil layer IV (8) respectively are provided with three through holes on same position, and carry out the via hole connection, form another conductor exit.

2. according to the described a kind of low inductance flat cable of claim 1, it is characterized in that: all adopt gold-plated processing in all flat copper foil layer end 20mm scopes.

3. according to claim 1 or 2 described a kind of low inductance flat cables, it is characterized in that: respectively be provided with a joint pin on wherein two conductor exits of one at described cable two.

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