SU803023A1 - Electromagnetic device - Google Patents

Description

The invention relates to electrical apparatus and control systems, for example, command apparatuses of pulse control systems for electric motors.

In known electromagnets, a device (EC) with a control flow performs the functions of a non-contact regulating element in a chain of control pulses.

It is known to use EI in electrical devices, for example, in drossel x or lH2 transformers, where there is one or three-core magnetic core (core). several electric coils. The magnetic core of the rotating core is made in the form of a cylinder or Plate segment and mates with a similar surface of the magnetic core.

A change in the inductance of the EC or the redistribution of the magnetic rods along the rods of the magnetic circuit is carried out by rotating the core, and the magnetic flux between the central and side rods of the magnetic circuit changes.

The disadvantage of these EIs is the impossibility of obtaining various patterns of regulation or redistribution of magnetic fluxes on the same magnetic system.

The purpose of the invention is to create an EI with a single magnetic core that is simple to manufacture and operate for a throttle or transformer version, which, in comparison with the known EI, has the ability to obtain various control patterns.

This is achieved by the fact that EI is equipped with an W-shaped magnetic core, coils and a turning coil located parallel to the plane of the base of the magnetic circuit, with the axis of rotation of the core shifted relative to the axes of symmetry of the magnetic circuit.

Claims (2)

FIG. 1 - general view and traffic of inductance change; in fig. 2 shows the arrangement of the core relative to its center of rotation and the movement of the core relative to the cores; variants of the electric coils are placed on the cores; in fig. 3 shows plots of inductance or voltage changes on the coils depending on the overlapping of the cores in FIG. 2). 4 shows a variant of the initial alignment of the core with the cores; in fig. 5 shows graphs of inductance or voltage changes on coils depending on the overlapping of the cores in FIG. 4 in FIG. 6 shows a variation of the shape (contour) of the core; FIG. 7 shows graphs of inductance changes or voltages on the coils depending on the overlapping of the cores with the core of FIG. The electromagnetic device contains a fixed W-shaped magnetic core 1 with one coil 2 or several coils 2.2.1 and 2.2 (Fig. 2). There is a recess in the central core of the magnetic circuit 1. Attaches measles 3 to the ends of the cores, which with the help of the leash 4 is connected to the female 5. The entire assembly is fixed to the end of the drive shaft 7 (for example, the controller shaft) with a locking screw b. The lead 4 due to its spring properties with some force presses the measles 3 to the ends of the cores of the magnetic circuit 1, ensuring the fit of the core to them without a gap. When the shaft 7 is rotated, the bark 3 is displaced relative to the magnetic core 1, and the core overlap of the cores changes, as well as the core position relative to the cores. As a result, the inductance of the magnetic system and the pattern of distribution of magnetic fluxes induced by the coil when it is powered by alternating or pulsating (pulsed) current changes. An approximate change in the inductance of the EC is given in the graph (Fig. 1), where curve a shows the change in inductance without correction, and curve b with correction using a recess 8 at the end of the central core of the magnetic circuit 1. When the EC operates in the regulated throttle mode, the cor 3 moves from relative to the cores causes a change in the inductance of the EC (Fig.3.5 and 7) When the EC operates in a transformer mode with an adjustable coupling coefficient along the magnetic flux, moving the core relative to the cores causes a change in the output voltage Coils 2.1 C 2.2 (Fig.2.4 and 6) (curves 2.1 and 2.2 Fig.3.5 and 7) With the relative position of the core 3 and the magnetic core 1 (Fig.4) when about the axis of the core relative to the axes of symmetry of the magnetic circuit is rotated at a certain angle p, the asymmetry of the curves of inductance change or voltage is increased when the core is rotated by the angle od and o (j (2, .2.1, 2.2 - right and left branches of the curves of the graph, figure 5). With cortex 3 of asymmetric formulas (Fig. 6), pronounced asymmetry of the curves of inductance change is achieved or strained when the core is rotated at an angle с and o ((right and left branches of curves 2, 2.1 and 2.2 of the graph, FIG. 7). A cutout 9 (Fig. 3) of core 3 or a similar depression on the side of the working surface of the core allows for an additional correction of the EC inductance curve. A change in the location of the core 3 relative to the center of rotation (Fig. 2, coordinates A and B, points 0, OA and OJ leads mainly to a change in the steepness of the curves of inductance or voltage changes. For example, the graph (Fig. 3) shows change in the angular range of the adjustable parameter (inductance or voltage) depending on the magnitude of the coordinate A (Fig. 2), (point 0., 02 and O,) at a constant coordinate B. Compressing the core to the ends of the cores of the magnetic circuit 1 due to springs properties of the leash 4 ensures stable operation of the EI with max. The efficiency and low moment of resistance, as the preload force should only compensate for the possible debris of the core when the EC is operating under vibration and power conditions, for example, on vehicles (electric vehicles, electric carts, etc.). Invention formula 1. Electromagnetic a device with a controlled magnetic flux containing an Ш-shaped magnetic circuit, coils and a measles, made in the form of a plate and located parallel to the plane of the base of the magnetic circuit and mounted with the possibility of rotation around an axis, different So that, in order to expand the functionality, the axis of rotation of the core is shifted relative to the axes of symmetry of the magnetic conductor, with the measles pressed against the ends of the cores of the magnetic conductor by means of an elastic leash rigidly connected with the cow. 2. The device according to Claim 1, which is based on the fact that there is a gap between one of the cores of the magnetic core and the core, which partially reduces the area of their contact compared to the junction area of the other two cores with the core. .3. A device according to Para., Characterized in that the measles are set in such a way that, in the position of complete overlapping of the cores of the magnetic core, its longitudinal axis of symmetry is located at an angle to the axis of symmetric 58030236 of the magnetic conductor passing through the sources of information ends of the core. taken into account during the examination 4. The device according to claim 1, about t l and h a- 1. US patent W 3544939, ya e with the fact that the configuration of cl. 336-135,1971. core in projection on its plane2. USSR author's certificate conjugation with cores has unim-, No. 427403, cl. H 01 F 21/06, 1974 matrix form. (prototype). 0 Fi..2 2.1 FIG. 6