SU942217A1 - Linear electric motor - Google Patents

Description

one

The invention relates to a machine building industry and can be used in designing reciprocating motion and rectilinear electric drives with a wide range of speed control.

A well known electrical engine contains two moving parts relative to each other, one of which includes a magnetic circuit with uniform Q alternating sections of high and low magnetic permeability, and the other a variable section magnetic conductor carrying in the middle part an excitation system, and in the extreme 2 C each - the core winding of two coil groups with an equal number of sections in the group.

However, the known structure, along with the obvious advantages associated with the large copper savings and the uniformity of the pull, is characterized by a significant decrease in efficiency due to the fact that some of the active sides of the winding that are opposite to the sections of low magnetic permeability, it is flown around current, but does not participate in the creation of traction.

The purpose of the invention is to increase the efficiency of an electric motor by reducing losses in the winding of the core.

The goal is achieved by the fact that the first of these parts of an electric motor is fixed and formed by two magnetic strips, the protrusions and depressions of which are shifted relative to each other by the magnitude T, where TG is pole division, and the coil winding groups are connected to an additional collector - the CIM in such a way that the ends of the sections of the first coil group and the beginning of the sections of the second coil group are connected to the copector plates through the semiconductor elements of the insepolar polarity The n section of the first bobbin group and the first section of the second bobbin group are connected to one common collector plate. Dp implementation of the reverse semiconductor elements can contain two thyristors, interlocked anti-paralyzed. At 4mg. 1 shows the structural scheme of the proposed linear motor; FIG. 2 shows the principle of obtsazovaya the circuit of the winding of the pike electric motor with semiconductor elements;) in FIG. 3 is a diagram of the winding of the core of the proposed linear direct current motor with an uncontrollable ass wiring elements; in fig. 4 - the same, with controlled semiconductor elements. The proposed motor (Fig. 1) consists of two ferromagnetic strips 1, the axes of the protrusions of which are shifted relative to each other by the magnitude of the pole division V in such a way that depression of the opposite lane. The width of the protrusion is equal to the width of the depression and constitutes a pole division. Between the ferromagnetic stripes there is a magnetic conductor 2 core made of manufactured steel. On both sides of the large groove, width T, for the laying of the excitation winding 3, two identical length sections are arranged. 2 t, on which parts of the crust winding 4 and 5 are located. Each part of the crust winding is located on two surfaces of the core magnetic circuit. The single-layer, two-plane template winding of the core is made of equal numbers of two-dimensional patterned sections: smaller sections, which fit directly onto the core magnetic core, and larger sections, laid on the measles, already covered by smaller sections, and the distance between the active sides of each section lying on both surfaces of the core magnetic circuit, is equal to pole division. FIG. 2 shows the connection of the sections of the core winding of a linear electric motor and their connection through ventilation elements to the collector plates. The motor core winding consists of two equal groups of patterned sections (in this case, a group of sections of larger size 1-1, 2-2, W, 3-4 and groups of smaller sections 5-5, 6-6 7-7, 8-8), connected to the collector plates according to the simple loop loop right winding with the right round in each group. At the same time, the ends of sections of the first group K1, K2, KZ and K4 are connected to collector plates 2, 3, 4 and 5 through semiconductor elements B1, B2, VZ and B4, and the beginning of sections of the second group H5, H6, H7 and H8k to collector plates 5 , 6, 7 and 8 through semiconductor elements B5, 86, B7 and B8 of counter-reciprocity in such a way that the end of the last section of the first group and the beginning of the first section of the second group are connected to the common (1) -th in our case 5th collector plate through semiconductor, elements of opposite polarity, where K-. total number of collector winding plates. For the example shown in FIG. 1 of the arrangement of the magnetic core 2 of the core and the protrusions of both ferromagnetic strips 1 when the brushes contact the 1st and 5th collector plates (Fig. 2, the position of the brushes a) the current flows only through the first group of sections, while the second group due to head-on valves B5, B6, B7 and B8 do not flow around. Thus, in accordance with FIG. 1, the conductors 1, 2, 3, and 4 of the upper plane of the core core and 1, 2, 3, and 4 of its lower side in the directions shown in the figure flow around the current. The right side of the core of the core with a winding 5 (Fig. 1) works similarly. The linear electromechanical collector is located together with the core winding and semiconductor elements on the magnetic core 2, and the brushes on one of the ferromagnetic strips 1 with an interval equal to Tm. The operation of the proposed engine consists in the linear movement of the core under the action of a traction electromagnetic force F (Fig. 1). It arises in accordance with the law of Bio-Savart-Laplace and, when shown in Fig. 1, the directions of the currents of the core winding and the magnetic flux are directed to the right. Due to the presence of this force P, the magnetic core 2 begins to move in the indicated direction. The electromechanical (or semiconductor) switch switches the current in the winding sections of the core in such a way that only those winding sections that are at a given time against all the projections of the ferromagnetic strip are flowing around the current, and the sections opposite to all the cavities of the strip are de-energized. And conductors.

5 942217, 6

of the left part (relative windings of the bays. This causes a constant weave) of the sections, which are opposed to the traction force,

projections have all the same wrong — The table shows the section numbers,

chanting currents, and the conductors of the right part of the current flowing through the stream, when moving

these sections also all have the same -5 ditoprvod 2 per dpiu 2 V (Fig. 2, a,

The second (opposite) direction is b, c, d, d, e, f, w, i).

Claims (2)

The winding core shown in FIG. 2, only explains the principle of operation of the proposed linear DC motor. However, if one parallel branch consists of sections of a larger size, and the other of sections of a smaller size, the core winding will, as is known, be asymmetrical. To eliminate asymmetries, both parallel branches are made up of reinforced sections consisting of one larger section, for example, lying in the left part of the magnetic conduit, and a smaller section of the right part of the magnetic conductor and, respectively, vice versa. Thus, the first parallel to the branch (Fig. 3) consists of four enlarged sections: l-l and 13 2-2 and 14-14; ЗЗ З and 15-15; 4-4 and 16 -16. The second parallel branch also consists of four enlarged sections: 5-5 and 9-9; 6-6 and 7-7 and 11-11; 8-8 and 12-12. The reverse in the proposed linear electric motor can be carried out in two ways: when using uncontrolled semiconductor elements (valves) as semiconductor elements - switching the polarity of the excitation winding voltage (Fig. 3); when using semiconductor elements as controlled rectifiers ( thyristors) - by changing the polarity of the voltage on the brushes (Fig. 4). In this case, the semiconductor-i elements contain two thyristors connected in anti-parallel manner. Then, when moving in one direction, a group of thyristors works, for example: T1, TZ, T5, T7 and T10, T12, T14, T16, and when the polarity changes, the T9, T2, T4 group is hidden on the brushes. T6, T8 and T9, T11, T13, T15. It is possible to use symmetric TCR (simistor) instead of anti-parallel thyristors. Thus, due to the fact that in this linear electric motor design, only half of the core winding (the winding section opposite the protrusions of the stationary ferromagnetic strips) always works, copper losses are halved and, accordingly, the efficiency of the motor increases. The formula is invented, 1. Linear electric motor, containing two moving each other the other part, one of which includes a magnetic conductor with a uniform cross section of high and low magnetic permeability, and the other a magnetic section of variable cross section, carrying in the middle part an excitation system, and in the extreme part of 2 t each is a winding and two coil groups with equal the number of sections in the group, characterized in that, with an increase circuit in the efficiency of the electric motor, the first of said parts is fixed and is formed by two magnetic strips, the projections and depressions of which are shifted relative to each other and by the value of tr J where - C is pole deposition, and the coil winding core groups are connected with the additionally entered colphi 9, 1 by the lecturer in such a way that the ends of the section of the first coil group and the beginning of the sections of the second coil group are connected to the collector plates through the semiconductor elements of opposite polarity, with the last section of the cathome group and the first section of the second coil group connected to the same shell. collector plate. 2. The electric motor according to claim 1, which is implied by the fact that, with an implementation circuit, reverse, the semiconductor elements contain two thyristors connected in anti-parallel manner. Sources of information taken into account with expert 1, USSR Author's Certificate No. 192895, cl. H 02 K 37 / OO, 1964. cravOtg .. W ST Figure 2 Ж Ж. I and I, 4 | 5 S .. s NxXxt AT 5 L m BUT IN 1 S P M I  , NXXX / B1 AND IN 1 g j 3iz four 3Z  eight to Fig.Z. F mi -. H rj) / "j" (