RU2226736C2 - Commutator-free dc voltage generator - Google Patents

Abstract

FIELD: electrical engineering; dc voltage generators. SUBSTANCE: commutator-free dc voltage generator that incorporates drive and is coupled to output of the latter through one of its shaft extensions has shaft carrying minimum two pairs of alternating poles symmetrically mounted on outer side surface of shaft, series-interconnected windings of each pole pair of alternating magnetic poles disposed on outer side surfaces of alternating magnetic poles, stator secured on inner surface of generator casing, series-interconnected stator winding coils secured on stator frame and symmetrically disposed above tops of end surfaces of alternating magnetic poles, armature winding coils placed in slots on outer side surface of armature which is mounted on outer surface of generator shaft, these coils being interconnected in series and forming coil leads at points of connection of starting and finishing leads of armature winding coils; armature coil leads are diametrically connected to respective leads of series-interconnected windings of each pair of alternating magnetic poles; it also has permanent magnets disposed above outer surface of armature winding and secured on inner surface of generator frame and series-interconnected permanent-magnet windings disposed on their side surfaces. EFFECT: enhanced output voltage; simplified design. 1 cl, 3 dwg

Description

The proposed solution relates to the field of electrical engineering and can be used to obtain the required output voltage with a simple structural implementation and the absence of electrical interference from the brush assembly.

Similar technical solutions are known - see, for example, USSR author's certificate No. 514221, which contains the following set of essential features: a drive, a generator, articulated at one end of its shaft to the output of the drive, and a rectifier connected by its input to the terminals of the stator winding.

Common features of the proposed technical solution and the analogue described above are the drive and the generator, articulated at one end of its shaft with the output of the drive.

The technical result, which cannot be achieved by the above-described analogue, is to exclude the brush assembly, which creates electrical noise, and obtain a relatively simple design.

The reason for the impossibility of achieving the indicated technical result is that the prevailing development trends when creating electric generators are mainly aimed at their various improvements, which, as a rule, do not change the prevailing ideas and do not allow to go beyond the well-known technical solutions in this technical field.

A similar technical solution is also known - see USSR author's certificate No. 886157, which is selected as a prototype and which contains the following set of essential features: a drive, a generator, articulated at one end of its shaft with the drive output, and a rectifier connected by its output to the stator windings .

Common features of the prototype and the proposed technical solution are the drive and the generator, articulated at one end of its shaft with the output of the drive.

The technical result that cannot be achieved in the prototype is to exclude the brush assembly, which creates electrical noise, and obtain a relatively simple design.

The reason for the impossibility of achieving a technical result in the prototype is that the prevailing development trends when creating electric generators are aimed mainly at their various improvements, which, as a rule, do not change the prevailing ideas and do not allow to go beyond the well-known technical solutions in this technical field.

Given the characteristics and analysis of known technical solutions, we can conclude that the task of creating brushless DC generators that allow you to have the required output voltage with a simple structural implementation and the absence of electrical noise from the brush nodes is relevant today.

The technical result indicated above is achieved by the fact that in a brushless DC generator containing a drive and a generator articulated at one end of its shaft with the drive output, the generator is made in the form of a shaft of at least two pairs of variable magnetic poles symmetrically mounted on the outer side the surface of the shaft, successively connected to each other by the windings of each pair of variable magnetic poles located on the outer side surfaces of the variable magnetic poles, a stator mounted on the internal surface of the generator housing, mounted on the stator housing of stator coil coils connected in series, symmetrically located above the outer end surfaces of the alternating magnetic poles, anchor coil coils placed in grooves on the outer side surface of the armature mounted on the outer surface of the generator shaft, and connected in series with each other with the formation of conclusions at the points of connection of the beginning and end of the coils of the anchor winding and diametrically connected by their The appropriate terminals to corresponding terminals serially connected between a winding of each pair of alternating magnetic poles, permanent magnets arranged on the outer surface of the armature winding and secured to the inner surface of the generator body and is connected in series between the windings of the permanent magnets disposed on their lateral surfaces.

The execution of the generator, as described above, allows you to get the generator shaft from the drive into rotational motion and supply voltage from the excitation regulator to the permanent magnet windings to obtain, at the terminals of the anchor winding coils, half waves of positive and negative output sinusoidal voltage, which are simultaneously transmitted to the corresponding variable windings magnetic poles. Moreover, each alternating magnetic pole from 0 to 180 ° of the shaft revolution will always be north, and passing from 180 to 360 °, it will always be south, and due to the intersection of the upper sides of the stator winding coils of the generator with the magnetic lines of the north magnetic pole, and the lower of the sides of the stator winding coils of the generator with magnetic lines of the south magnetic pole in the stator winding coils connected in series with each other with a diametrical pitch for our figure, a constant voltage EMF will occur when relate The simple constructive implementation of the proposed technical solution in the absence of a brush assembly that creates electrical noise. In this, the achievement of the technical result indicated above is manifested.

A comparative analysis of the proposed technical solution with the prototype showed the presence of novelty, and the absence of distinctive features of the proposed technical solution in the known technical solutions showed the presence of an inventive step.

The proposed brushless DC generator is illustrated by the following description and drawings, in which Fig. 1 shows the design of a brushless DC generator, in Fig. 2 and Fig. 3 shows a diagram for connecting the leads of the armature coil coils to the corresponding leads of each pair of windings connected in series variable magnetic poles.

The proposed brushless DC generator contains:

- building 1;

- a shaft 2 mounted in bearings (not indicated in the drawing) of the side walls of the housing - 1;

- drive 3, articulated by its output with the end of the shaft - 2;

- alternating magnetic poles 4, 5 (only one pair of poles is indicated on the drawing) made of sheet electrical steel, symmetrically mounted on the outer side surface of the shaft 2;

- windings 6, 7 of each pair of variable magnetic poles, connected in series with each other and located on the outer side surfaces of the variable magnetic poles 4, 5;

- stator 8, mounted on the inner surface of the housing 1 of the generator;

- coils of the stator winding 9, 10 sequentially interconnected to each other, fixed on the stator housing 8, symmetrically located above the outer end surfaces of the variable magnetic poles 4, 5;

- coils (figure 2) of the anchor winding 11 (figure 1), placed in the grooves on the outer side surface of the armature 12 mounted on the outer surface of the shaft 2 of the generator, and connected in series with each other with the formation of conclusions 1-12 (figure 2 and 3) at the points of connection of the beginning and end of the coils of the anchor winding 11 and diametrically connected according to the pie chart (see figure 3 - voltage polygon) with their respective conclusions 1-12 (figure 2 and 3) to the corresponding conclusions of the windings 6 connected in series 7 of each pair of variable magn total poles 4, 5;

- permanent magnets 13, 14, located above the outer surface of the anchor winding 11 and mounted on the inner surface of the housing 1 of the generator;

- windings 15, 16 of permanent magnets 13, 14 connected in series, located on the side surfaces of the permanent magnets 13, 14 and connected by their terminals to the output of the excitation voltage regulator (not shown).

The proposed brushless DC generator operates as follows. When voltage is applied from the output of the excitation voltage regulator (not shown in the drawing) to the terminals of the windings 15, 16 connected in series located on the side surfaces of the permanent magnets 13, 14, and when the drive 3 is turned on, the shaft 2 is rotated and simultaneously driven rotation of the coil of the anchor winding 11, variable magnetic poles 4, 5 and windings 6, 7. In the coils of the anchor winding 11 when crossing the magnetic field lines of the permanent magnets 13, 14, an EMF variable is induced, which is synchronous with the rotation of the shaft 2 s conclusions 1-12 (figure 2 and 3) of the coils of the anchor winding 11 will go to the corresponding conclusions of the windings 6, 7 of each pair of alternating magnetic poles 4, 5 connected in series. Moreover, when the shaft 2 is turned from 0 to 180 °, there will be a positive sinusoidal half-wave, and with a rotation of the shaft 2 from 180 to 360 ° there will be a negative sinusoidal half-wave. Moreover, each alternating magnetic pole 4, 5 of the generator shaft 2, passing from 0 to 180 ° of the generator shaft 2 revolution, will always be north, and from 180 to 360 ° of the generator shaft 2 revolution will always be south, and due to the intersection of the upper sides of the coils windings 9 of stator 8 with magnetic lines of the north magnetic pole, and the lower sides of coils of windings 10 of stator 8 with magnetic lines of the south magnetic pole in series windings 6 and 7, laid in grooves with a diametrical pitch for our figure, will be arise emf constant voltage.

Thus, the proposed brushless DC voltage generator allows, with a simple structural implementation and available elements and assemblies commercially available by enterprises, to obtain the required constant voltage without electrical interference previously imposed on this output voltage due to sparking of the collector-brush assembly. Moreover, the cost of manufacturing the proposed brushless constant voltage generator is reduced by about 20-30%, and the service life is significantly increased (no need to change brushes), therefore, the proposed brushless constant voltage generator will have wide practical application.

Claims (1)

A brushless DC voltage generator containing a drive and a generator articulated at one end of its shaft to the output of the drive, characterized in that the generator is made in the form of a shaft of at least two pairs of variable magnetic poles symmetrically mounted on the outer side surface of the shaft, connected in series with each other each pair of variable magnetic poles located on the outer side surfaces of the variable magnetic poles, a stator fixed to the inner surface of the housing of the generator a, stator coils connected to each other in series between stator coils, symmetrically located above the outer end surfaces of alternating magnetic poles, anchor coils located in grooves on the outer side surface of the armature mounted on the outer surface of the generator shaft and connected in series with each other, the formation of conclusions at the connection points of the beginning and end of the coils of the anchor winding and diametrically connected with their respective conclusions to the corresponding the terminal leads of the windings of each pair of alternating magnetic poles, permanent magnets located above the outer surface of the anchor winding and fixed to the inner surface of the generator housing and successively connected between the windings of permanent magnets located on their side surfaces, connected in series with each other.

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