SU1534658A1 - Inductor generator - Google Patents

Abstract

The invention relates to electrical engineering, namely to electric generators of moving objects, mainly automobiles and tractors. The purpose of the invention is to reduce the mass and size parameters of the generator by increasing the difference between the maximum and minimum of the magnetic flux. The rotor of the generator is equipped with a washer 7 of aluminum alloy, the end protrusions 9 of which are placed between the teeth of the rotor 5 with a gap. Permanent magnets can be mounted inside the end projections. Eddy currents in the end tabs increase the pulsations of the magnetic flux in the stator teeth. 1 hp f-ly, 4 ill.

Description

figure 1

The invention relates to electrical engineering, namely to electric generators of moving objects, mainly automobiles and tractors.

The purpose of the invention is to reduce the overall dimensions of the generator by increasing the difference between the maximum and minimum of the magnetic flux.

Figure 1 shows the inductor generator; figure 2 is the same, top view; Fig. 3 shows an aluminum alloy washer with permanent magnets located inside its end projections; figure 4 is the same, top view.

The generator contains a stator 1 with clearly defined poles 2, on which the coils 3 of the stator winding 1 are mounted with placement in the slots 4, the rotor 5, the package of which has teeth 6 distant from each other by depressions, a washer 7 of electrically conductive material mounted on the rotor shaft

8 with end protrusions 9 placed in the depression between the teeth of the rotor 5 so that air gaps 10, the magnetic cover 1I, the inductor 12 installed in it and the excitation winding 13 remain between them and the teeth. Inside the lugs

9 washers 7 (FIGS. 3 and 4) can be placed, for example, by pouring permanent magnets 14.

The generator works as follows.

When current flows through the excitation winding 13, a magnetic flux occurs, which closes across the magnetic cover, AND, the inductor 12, the rotor 5 and the stator 1. Putting the rotor 5 into rotation causes the magnetic flux to pass through the poles 2 of the stator 1 and pierce the coils 3 of the winding stator 1, pulsate from the maximum value corresponding to the location opposite the pole 2 of the stator 1 of the rotor 6 teeth to the minimum value corresponding to the location opposite the pole 2 of the stator 1 of the depression between the rotor teeth. The greater the difference between the maximum and minimum values of the magnetic flux penetrating the coils 3 of the stator winding 1 as the rotor rotates 5, the more EMF is induced in the winding, and the smaller the stator and rotor sizes, and therefore

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dimensions and masses of the generator can provide the desired value of emf at given small values of the rotor speed.

An increase in the difference between the maximum and minimum values of the flow penetrating the coils 3 of the stator winding 1 is achieved by reducing the absolute value of its minimum value. The smallest value of the magnetic flux in the trough of the rotor package occurs when the trough is located opposite the groove of the stator 1, since in this case the air gap between the trough of the rotor and the magnetically conductive parts of the stator 1 is the largest. When the rotor pole of stator 1 is installed when the rotor rotates opposite the rotor trough, the magnetic flux from the rotor trough should increase, since the magnetic conductive part of the stator (pole 2) approaches the trough. However, according to the Lenz law, eddy currents, which are induced in the end projections 9 of the washer 7 made of an electrically conductive aluminum alloy, prevent this flow from increasing. Thus, the minimum magnetic flux penetrating the coils 3 of the stator winding 1 is reduced, since it corresponds to the amount of flow between the rotor trough and the groove 4 of the stator 1. The maximum magnetic flux, i.e. The magnetic flux entering from the rotor tooth 6 into the pole of the stator 1 does not change when the end tabs 9 of the washer 7 are placed in the cavities of the rotor 5, as the insulating air gaps 10 between the rotor teeth 6 and the end tabs 9 interrupt the circuit for closing eddy currents and the magnetic flux in the rotor tooth is not damped.

An additional reduction in the minimum magnetic flux penetrating the coils 3 of the stator winding 1 is achieved by positioning the permanent projections 9 of the permanent magnets 14 magnetized in the direction of the radius of the washer and having the polarity of the magnetic flux opposite to the polarity of the flux in the rotor 5. The magnetic flux of the magnets 14 is directed towards the flow of the rotor trough, which reduces the minimum magnitude of the magnetic flux from the rotor trough to the pole of the stator 1, and, consequently, winding through the coil 3 ki stator 1 at the location of the pole 2 opposite the rotor trough. Thus, the proposed technical solution allows to reduce the size and weight of the inductor generator by optimizing the zone for converting mechanical energy into electrical energy.

Claims (2)

Invention Formula I, Inductor generator, mainly for automobiles and tractors, containing a magnetic core, an inductor mounted therein with an excitation winding, a gear rotor, and five a pole stator, on the poles of which coils and windings are placed, characterized in that, in order to reduce mass-dimensional parameters by increasing the difference between maximum and minimum magnetic flux, the generator is equipped with a washer ke of electrically conductive material with end tabs mounted on the rotor on the side opposite to the inductor, and the tabs of the washer are placed between the teeth of the rotor with a gap. one 2. The generator is characterized in that permanent magnets are installed inside the end projections. Yu FIG. g Fig.z TO fig