JP2000340414A - Non-inductive winding fixed resistor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the electrostatic capacity and the residual inductance by winding the even number of resistance wires in the opposite directions from a starting point of a winding frame, twisting them when they meet, pushing the twisted part against the surface of the winding frame, then further winding the wires in the opposite directions, and repeating this process. SOLUTION: Two same kinds of resistance wires 2 are wound along the surface of a cylindrical winding frame 1 in the opposite directions by about 180 deg. in the shape of a semi-circular arc. When the two wires meet, they are twisted once or more times. Thereafter, the twisted part 3 is bent down at right angles with a face formed by the circular arcs in the winding progressive direction to be adhered to the surface of the cylindrical winding frame 1, and then the two wires are wound again in the opposite directions along the surface of the cylinder. By repeating this process a specified number of times, a non-inductive resistor is formed. For the number of stages of the winding wires, the even number is preferable. For the resistance wires 2, either insulation coated ones or non-coated ones would be acceptable. The winding start and the winding finish of the resistance wires 4 are connected to annular presser metal fittings and terminals 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pattern of a resistor of a non-inductive winding type fixed resistor in a telecommunications field and a method of manufacturing a non-inductive winding type fixed resistor having the pattern.

[0002]

2. Description of the Related Art Fixed resistors include wire wound type, carbon film type,
A metal film type, a solid type, a chip type and the like have been put to practical use. A commonly used fixed resistor has a residual inductance in addition to a pure resistance component. In electric and electronic equipment, fixed resistors are used in a frequency range where the influence of the inductance is small, or are used after taking measures to prevent the inductance from adversely affecting the fixed resistor. Therefore, a resistor having a small inductance is usually required in a field of a high-frequency device, a field of a device using a pulse, and a field of a device which easily generates a high surge voltage. Originally, a conductor with a certain length has inductance with respect to AC, so there is no such thing as a non-inductive type resistor in a strict sense. If it is small, it is called a non-inductive type resistor and is used. Therefore, solid type,
The chip type is a non-inductive type and is generally used. Hereinafter, the non-induction winding type fixed resistor is simply referred to as a winding type resistor or a resistor.

[0003]

Since the wound type resistor is usually formed in a coil shape, the inductance increases as the number of turns of the coil increases.

[0004] As shown in Fig. 4, a conventional wire wound resistor generally has a structure in which a resistance wire is spirally wound around a porcelain cylinder at equal intervals, and both ends of the wire are connected to a ring-shaped holding fitting and terminal. In the figure, 1 is a porcelain cylinder, 2 is a resistance wire, and 3 is a ring-shaped holding fixture and terminal. The coil is formed by spirally winding the resistance wire, so that a residual inductance is generated.

(Current measures for reducing inductance)
In order to reduce the inductance of the spirally wound resistance wire, there are several patterns as described below in which the winding of the resistance wire is devised. The effects are recognized respectively, but there are problems. 1) Bifiler winding: As shown in FIG. 5 (A), the total length of the resistance wire is divided into two parts, and the two windings are wound together. Since it is close, it is necessary to take a large withstand voltage. 2) Airton-Perry winding: As shown in FIG. 5 (B), two resistance wires are wound on a thin plate in the opposite direction at the same pitch and with the same number of windings. Is troublesome. 3) Curtis-Gover volume: As shown in FIG. 5C, it is good in principle, but hard to make. 4) Halfway reversing winding: As shown in FIG. 5 (D), the winding direction is reversed for each integral number of turns of the coil, and it is troublesome to provide a means for holding the resistance wire at the reversing part. Is not very effective. 5) Multi-split coil: As shown in FIG. 5 (E), the coil is split into a plurality of pieces, and the split coils are connected alternately in opposite phases.

The present invention has been made to solve the various problems described above. That is, an object of the present invention is to provide a non-inductive winding type fixed resistor which has a small capacitance, is easy to manufacture, and has a small residual inductance, and a method of manufacturing the same.

[0007]

According to the present invention, there is provided a non-inductive winding type fixed resistor formed by winding a resistance wire around an insulating material or a conductor winding whose surface is insulated, and a method of manufacturing the same. The two resistance wires are wound in pairs in the opposite direction from a starting point at an equal interval on a plane perpendicular to the axis of the winding. The length of the wire is divided by the number of resistance wires.When the wire is twisted a predetermined number of times at the position where the wires are matched, the wire is pressed against the surface of the winding wire, and the resistance wire is further paired with the end point of the twisting as the starting point. A non-inductive winding type fixed resistor and a method for manufacturing the same are characterized in that the winding is performed one by one on a plane perpendicular to the core in the reverse direction, and this process is repeated a predetermined number of times.

Further, according to the present invention, in a non-inductive winding type fixed resistor in which a resistance wire is wound around an insulating material or a conductor winding whose surface is insulated, and a method of manufacturing the same, an even number of resistance wires are formed. The two wires are wound in opposite directions at a predetermined angle with respect to the direction of the axis of the winding frame, and after the two wires are wound the same length and twisted a predetermined number of times, they are wound. The resistance wire is pressed against the surface of the frame, and a pair of resistance wires are wound at a predetermined angle with respect to the direction of the axis of the winding frame, starting from the end point of the twisting, in opposite directions, and this process is repeated a predetermined number of times. A non-inductive winding type fixed resistor and a method of manufacturing the same are provided.

According to a preferred embodiment of the present invention, the step of assembling a plurality of resistance wires on the surface of the winding form is not performed for each resistor, but is made as a continuous sheath-shaped long object on a temporary winding form. Then, it is detached from the temporary winding frame, cut into a predetermined length, and stretched and mounted on a surface of a frame that is a product having a slightly smaller diameter than the temporary winding frame.

As described above, according to the present invention, a non-inductive type unique to a winding frame (cylinder, cylinder, equilateral / unequal-sided cylinder / square column, etc.) of a conductor whose resistance wire is an insulating material or whose surface is insulated is used. By mounting them on a resistor, a resistor having excellent high frequency characteristics and pulse resistance can be obtained. In addition, low-cost manufacturing is possible by a method suitable for automation of molding and mounting.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. In addition, the present invention relates to a winding frame (cylindrical /
(Including cylindrical, equilateral / equilateral prism, and equilateral prism)).

1) "Even line arc reverse winding folded type" Here, an example in which two resistance wires are wound around a cylindrical winding frame in the opposite direction will be described. FIG. 1 is a configuration diagram of an even-line circular arc reverse winding folded type resistor according to the present invention. As shown in this figure, two resistance wires 2 of the same kind are wound along the surface of a cylindrical winding frame 1 one by one in a 180 ° semi-arc in the opposite direction.
When the two wires meet, twist one or several times, lay the twisted part 3 at right angles to the surface where an arc is formed in the direction in which the twisted portion is wound, and make the two wires stick to the surface of the cylinder 1. Wrap one by one along the surface in the opposite direction in a semicircular arc.
By repeating this process a planned number of times, a non-inductive resistor having a desired resistance value is formed. It is desirable that the number of winding stages be an even number, but if the number of windings is large, an odd number has little effect on inductance. The resistance wire 2 may or may not have an insulating coating. The structure of connecting the resistance wire 4 at the start and end of winding to the ring-shaped holding metal fitting / terminal 5 may be the same as that of a general commercially available product.

According to the configuration of the present invention shown in FIG. 1, the current flowing through the two resistance lines is equal to one half of the total current flowing through the resistor, and flows on opposite sides along the arc. In addition, since the currents flowing through the adjacent resistance wires are also in the opposite directions, most of the magnetic field created by the currents is canceled out, so that the inductance can be greatly reduced. Since the potentials of the two wires are theoretically equal where the two resistance wires meet, even if a resistance wire without an insulation coating is used, almost no current flows between the twisted portions. If a resistance wire without insulation coating is used, even if there is any partial abnormality in one of the wires, the unbalanced current flows only between the twisted parts of the resistance wire including the abnormal part. The advantage is that the value and the inductance do not increase significantly. Since almost no current flows between the wires at the twisted part, there is no need to braze or weld if the part is tightly twisted, but if perfection is required, spot welding or laser welding is recommended. You.

2) "Even-number Honeycomb Winding Form" Here, an example in which an even number of resistance wires are wound in a honeycomb shape around a cylindrical winding frame will be described. FIG. 2 is a configuration diagram of an even-line honeycomb wound resistor according to the present invention. In this winding method, as shown in FIG. 2, a resistance wire 2 is wound around an insulating material or a winding frame (cylinder, cylinder, equilateral / unequal-sided rectangular cylinder / prism, etc.) 1 of a conductor whose surface is insulated and molded. In the wire wound resistor, a predetermined angle 7a is provided with respect to the direction of a virtual straight line 6a on the surface of the winding form parallel to the axis 6 of the winding form as two pairs of even-numbered resistance wires so as to be in opposite directions. When the two wires are wound and the same length is wound and matched, the wires are twisted a predetermined number of times (one or more times) at 8a, then pressed against the surface of the winding frame 1, and further, the resistance wire is set at the end point 9a of the twisting as a starting point. Are wound in pairs at a predetermined angle 7a with respect to the direction of a virtual straight line 6b on the surface of the reel parallel to the axis 6 of the reel. By repeating this process a predetermined number of times, a honeycomb type non-inductive resistor can be obtained. Some resistance wires have no insulation coating, and some can be used. The structure of connecting the resistance wires at the start and end of winding to the ring-shaped holding metal fitting / terminal 5 may be the same as that of a general commercially available product.

According to the configuration of the present invention shown in FIG. 2, the current flowing through the even-numbered resistor lines is equal to one even number of the total current flowing through the resistors, and is made by the current flowing through the adjacent resistor lines. Since the applied magnetic fields cancel each other, the inductance can be greatly reduced. Where two resistance wires meet, the potentials of the two wires are theoretically equal, so that even if a resistance wire without an insulating coating is used, almost no current flows in the twisted portion. For this reason, brazing or welding need not be performed if the twisted portions are firmly twisted, but spot welding or laser welding is recommended for completeness.

3) "Manufacturing Method" FIG. 3 is a schematic view of a method of manufacturing a wire-wound resistor according to the present invention. Fig. 1 "Even line arc reverse winding folded type" in which a resistance wire is arranged and molded on the surface of an insulating material or a conductor frame whose surface is insulated (cylinder, cylinder, equilateral / equilateral rectangular cylinder / prism, etc.) and FIG. 2 shows a non-inductive winding type resistor molding apparatus shown in FIG. 3 in which the step of assembling a plurality of resistance wires on the surface of one winding frame is not performed for each resistor in the resistor of the "even wire honeycomb winding type". As described above, the product is formed as a continuous elongated product 9b on the temporary winding frame 8b, and is removed from the temporary winding frame 8b or sent to the next continuous process as it is, and the product is slightly smaller in diameter than the temporary winding frame 8b. This is a method for manufacturing a non-inductive resistance wound type resistor, which is stretched and mounted on the surface of a frame 1a.

In FIG. 3, reference numeral 11 denotes a resistance wire bobbin which can stretch and twist the resistance wire on a temporary winding frame 8b while applying necessary tension by a suitable driving device (not shown). It is. Reference numeral 12 denotes a spot welder for welding the resistance wire at the twisted portion 10 of the resistance wire and the ring-shaped holding metal fitting / terminal 5. 13
Is a cutter which is separated from the non-inductive winding type resistor molding device when the resistor in the molding process has completed all the molding processes. Reference numerals 5 'and 5 "denote bands and rivets for forming a ring-shaped holding metal fitting / terminal 5.

According to the manufacturing method of the present invention shown in FIG.
Several types of work such as twisting, pressing, attaching holding brackets, and welding resistance wires can be performed separately in a wider space without having to be performed in a limited space on the bobbin. In addition, automation becomes easy, and manufacturing costs can be reduced.

The resistance wire used in the non-inductive winding type resistor of the present invention is not limited to any type such as a round wire, a square wire, and a flat wire, and some may have no insulation coating.
The non-inductive winding type resistor of the present invention can be used in a state where the resistance wire described above is exposed, but the surface can be enameled or molded.
A pattern obtained by adding these processes to the arrangement pattern of the resistance wires is included in the present invention. The basis of the present invention is a pattern of the arrangement of the resistance wires, and a non-inductive winding type resistor having a similar pattern which can be easily analogized from this pattern is interpreted as the scope of the present invention.

[0020]

As described above, according to the present invention, according to the present invention, the resistance wire is made of an insulating material or a conductor winding whose surface is insulated (a cylinder, a cylinder, an equilateral / unequal-sided rectangular cylinder / a prism, etc.). By being molded and mounted on an induction mold, a resistor having excellent high-frequency characteristics and pulse resistance characteristics can be obtained. In addition, low-cost manufacturing is possible by a method suitable for automation of molding and mounting.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an even-line circular arc reverse winding folded type resistor according to the present invention.

FIG. 2 is a configuration diagram of an even-line honeycomb wound type resistor according to the present invention.

FIG. 3 is a schematic view of a method of manufacturing a wire wound resistor according to the present invention.

FIG. 4 is a configuration diagram of a conventional wound-type resistor.

FIG. 5 is a diagram showing how to wire a resistance wire of a conventional wire wound resistor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Porcelain cylinder 2 Resistance wire 3 Twisted part 4 Resistance wire 5 Holding metal and terminal 5 'Band 5 "Rivet 6 Shaft core 6a, 6b Virtual straight line parallel to the shaft core 7a Predetermined angle 8a Matching point 8b Temporary winding Frame 9a End point of twisting 9b Sheath-shaped long object 10 Twisting part 11 Bobbin 12 Spot welding machine 13 Cutter

Claims (4)

[Claims] 1. A method of manufacturing a non-inductive winding type fixed resistor in which a resistance wire is wound around an insulating material or a conductor winding whose surface is insulated and molded, wherein an even number of resistance wires are attached to a shaft core of the winding sleeve. Two pairs are wound on the plane perpendicular to the opposite direction from the starting point at an equal interval in the opposite direction, and the two resistance lines from the adjacent starting points are each divided by the length of one round of the winding frame by the number of resistance lines. After twisting a predetermined number of times at the position where they match at the wound position, press the wire against the surface of the winding frame, and then, starting from the end point of the twisting, start a pair of resistance wires one by one on a plane perpendicular to the axis of the winding frame. A method of manufacturing a non-inductive winding type fixed resistor, wherein the winding is performed in a reverse direction, and this process is repeated a predetermined number of times. 2. A method of manufacturing a non-inductive winding type fixed resistor in which a resistance wire is wound around an insulating material or a conductor winding whose surface is insulated, and wherein the even number of resistance wires is wound as a pair. Winding in the opposite direction with a predetermined angle to the direction of the axis of the frame,
After the two wires are wound together for the same length and twisted together, they are twisted a predetermined number of times, then pressed against the surface of the winding frame, and a pair of resistance wires starting from the end point of the twisting are arranged in pairs with respect to the direction of the axis of the winding frame. A method for manufacturing a non-inductive winding type fixed resistor, comprising: winding in the opposite directions at predetermined angles to repeat the process a predetermined number of times. 3. The step of assembling a plurality of resistance wires on the surface of the winding form is not performed for each resistor, but is formed as a continuous sheath-shaped long object on the temporary winding form and removed from the temporary winding form. 3. The non-inductive winding type fixed resistor according to claim 1, wherein the fixed resistor is cut into a predetermined length, and is stretched and mounted on a surface of a frame which is a product slightly smaller in diameter than a temporary winding frame. Method of manufacturing the vessel. 4. A non-inductive winding type fixed resistor manufactured by the method according to claim 1.