RU2120148C1 - Inductance coil, its manufacturing technique and tool - Google Patents

Abstract

FIELD: radio engineering; antenna matching devices and radio transmitter tuning assemblies. SUBSTANCE: inductance coil is made in the form of n spiral coils with non-round turns wound as single piece of non-insulated wire on composite former built up of two panels joined together through strips each of whose slots holds turns of one of spiral coils as well as through insulating rods meant to ensure desired turn-to-turn space in spiral coils. Novelty is that odd-numbered spiral coils are wound from inner turn to outer one and even- numbered ones, from outer to inner turns. Coil manufacturing tool is built up of set of gaskets and plates of different size. Plates are rounded off at their corners and their thickness equals coil wire diameter; they are secured together with gaskets on rod. Inductance coil is wound on tool, then rod is removed together with gaskets and plates. After that, spiral coils are compressed each being placed in respective slots of strips; insulating rods are fitted between coil turns and inserted, together with projections of strips, into panel slots and secured therein by means of adhesive. EFFECT: improved stability of parameters, reduced mass and size of coil. 3 cl, 3 dwg

Description

 The invention relates to radio engineering and can be used in antenna-matching devices and tuning nodes of radio transmitters.

 Known single-layer inductor [1].

 The disadvantages of such a coil are its large dimensions and mass at a given inductance.

 Also known is an inductor consisting of n series-connected spiral coils with round turns [1].

 However, the connection of individual spiral coils into a set and the difficulty of making identical round turns with a varying diameter lead to a spread in the parameters of this coil during its manufacture, and also do not provide the required stability during operation.

A known method of manufacturing an inductor, which consists in winding multifaceted coils on a ribbed frame [2]. The specified method cannot be applied to solve the problem, since it does not allow the formation of spiral coils with a given shape of turns
A device for winding windings with non-circular coils is known, including a set of plates. However, it cannot be used for the manufacture of windings containing turns of different sizes.

 The single technical result achieved by the implementation of the claimed group of inventions is to increase the stability of the parameters of the inductor while reducing its weight and size characteristics.

 The specified technical result is achieved due to the design of the inductor in the form of n spiral coils with non-circular coils that are wound with a single piece of uninsulated wire and placed on a prefabricated frame consisting of two panels connected by combs, in each groove of which coils of one of the spiral are fixed coils, as well as dielectric rods designed to fix the pitch between the turns of the spiral coils. In this case, the winding of spiral coils with odd numbers is carried out from the internal coil to the external, and the winding of spiral coils with even numbers is carried out from the external coil to the internal.

 Distinctive features of the proposed inductance coil are the shape of the turns, winding of the coil with a single piece of wire, the winding sequence, as well as the placement of turns on the prefabricated frame, which allows you to rigidly fix both the step between the turns of spiral coils and the distance between them.

 Due to the presence of these signs, it becomes possible to realize an inductor characterized by high stability of parameters and relatively small dimensions at a given value of inductance.

 In FIG. 1 presents a variant of the proposed inductor.

 The inductor consists of 6 spiral coils 1 ... 6, wound with a single piece of uninsulated wire, containing three turns of a square shape. The winding of spiral coils 1, 3, 5 is made from the inner coil to the outer, and the winding of spiral coils 2, 4, 6 is from the outer coil to the inner. Spiral coils 1 ... 6 are placed on a prefabricated frame, which consists of two panels 7, connected on three sides by combs 8 (two of them are shown in Fig. 1) and dielectric rods 9. In the grooves of the combs 8, turns of spiral coils 1 are fixed. .6. Dielectric rods 9 fix the pitch between the individual turns of the spiral coils 1 ... 6.

 A method of manufacturing an inductor is as follows. The winding is wound with the formation of n spiral coils on the ribbed frame, which includes a set of plates and gaskets of different sizes placed on the rod, then the rod is removed, the winding is compressed by laying each of the spiral coils in the corresponding grooves of the combs, dielectric rods are installed between the turns of the spiral coils, placing them , as well as the mounting protrusions of the combs in the grooves of the panels, fix the rods and combs in the grooves of the panels with glue.

 In the manufacture of an inductor, a device is used consisting of a set of plates with rounded corners with a thickness equal to the diameter of the coil wire, defining the geometry and dimensions of individual turns of spiral coils and having a protrusion at one of the corners with a height equal to the step between the turns of spiral coils for making a transition from one turn on another larger or smaller size, and in the center - a hole in shape and size coinciding with the cross section of the rod, adapted for placement and fixing on first, in order of increasing sizes from smallest to largest, then decreasing from largest to smallest, and so on, while between the plates placed on the rod there are gaskets protruding relative to the edges of the plates that do not have a protrusion.

 In FIG. 2 shows a device for manufacturing an inductor, consisting of a set of plates 10 with rounded corners with a thickness equal to the diameter of the wire of the coil. The plates determine the geometry and dimensions of the individual turns of the spiral coils 1 ... 6 and have a protrusion at one of the corners with a height equal to the step between the turns of the spiral coils 1 ... 6 for the transition from one coil to another larger or smaller. In the center of each plate 10 there is a hole in shape and size matching the cross section of the rod 11, adapted to accommodate and fasten the plates 10 on it, first in order of increasing size from smallest to largest, then decreasing from largest to smallest, and so on. Between the plates 10 located on the rod 11, there are gaskets 12 protruding relative to the edges of the plates 10 without a protrusion. Gaskets 12 serve to prevent slipping of coils wound on plates 10.

 In FIG. 2a shows a set of plates and gaskets for manufacturing the inductance coil of FIG. one.

 In FIG. 2b shows the fixture assembly.

Sources of information
1. Kharinsky A. L. Fundamentals of the design of elements of radio equipment. - Energy, Leningrad branch, 1971.

 2. A.S. N815771, CL H 01 F 17/02, H 01 F 41/04.

Claims (3)

 1. An inductor containing n series-connected spiral coils, characterized in that the non-circular spiral coils are wound with a single piece of uninsulated wire and placed in a prefabricated frame consisting of two panels connected by combs, in each of whose grooves the turns of one of the spiral coils are fixed as well as dielectric rods designed to fix the pitch between the turns of the spiral coils, while the spiral coils with odd numbers are wound from the inner coil to the outer it, and helical coils with even numbers - from the outer to the inner coil.  2. A method of manufacturing an inductor, according to which the turns of a non-circular coil are wound on a frame, characterized in that the turns are wound with the formation of n serially connected spiral coils on a frame, comprising a set of plates and gaskets of different sizes placed on a rod, then the rod is removed, spiral the coils are compressed, laying each of them in the corresponding grooves of the combs, dielectric rods are installed between the turns of the spiral coils, placing them, as well as the mounting protrusions of the combs in the groove x panels, rods and fixed in the grooves of the comb panels with glue.  3. A device for manufacturing an inductor containing a set of plates, characterized in that it is equipped with a set of gaskets and a rod, the sets include plates and gaskets of different sizes, the plates are made with a hole in the center, with rounded corners and a thickness equal to the diameter of the wire of the manufactured coil, and determine the geometry and dimensions of the individual turns of the spiral coils, while on one of the corners of each plate, a protrusion is made with a height equal to the step between the turns of the spiral coils for the transition from the bottom of the turn to another larger or smaller size, the holes in the center of the plates in shape and size coincide with the cross section of the rod to place and fix the plates on it, first in order of increasing size from smallest to largest, and then decreasing from largest to smallest and so on , while between the plates on the rod are gaskets protruding beyond the edges of the plates that do not have a protrusion.

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