CN221408552U - Double-flux magnetic core stator winding - Google Patents

Abstract

The utility model belongs to the field of direct current motors, and particularly relates to a double-flux-linkage magnetic core stator winding. Comprises a stator; the stator comprises X iron cores arranged along the circumferential direction; each iron core is correspondingly provided with a stator coil; the magnetic steel is arranged on the X groups of stator magnetic steels in a one-to-one correspondence manner with the X iron cores; each group of stator magnetic steel comprises two stator magnetic steels; the two stator magnetic steels of each group are respectively arranged on two opposite sides of the corresponding iron core along the circumferential direction, the polarities of the two stator magnetic steels positioned on the same iron core are attracted, and the polarities of the two stator magnetic steels positioned between two adjacent iron cores are repelled. Compared with the existing direct current motor, the stator winding can obtain larger torque and save more electricity.

Description

Double-flux magnetic core stator winding

Technical Field

The utility model relates to a stator winding, in particular to a double-flux-linkage magnetic core stator winding.

Background

A direct current motor refers to a rotating electrical machine capable of converting direct current into mechanical energy or converting mechanical energy into direct current. When it operates as a motor, it can convert electrical energy into mechanical energy; when the generator is operated as a direct current generator, mechanical energy can be converted into electric energy.

The structure of the existing direct current motor generally comprises a stator, a rotor and a casing. The stator mainly acts to generate magnetic field, and consists of a stand, magnetic poles, commutating poles, end covers, bearings, brush devices and the like. The rotating part of the DC motor is called a rotor, and the main function of the rotor is to generate electromagnetic torque and induced electromotive force, and the rotor is a pivot for energy conversion of the DC motor, so the rotor is usually called an armature and consists of rotor magnetic steel, a rotating shaft, an armature core, an armature winding, a commutator, a fan and the like.

The existing working principle of the direct current motor mainly adopts an iron core and a coil winding, and push-pull motion of rotor magnetic steel is realized through current commutation in the coil winding, so that the rotor is driven to rotate, and the problems of low torque, high electric energy consumption and the like exist.

Disclosure of utility model

The utility model aims to solve the technical problems of low torque and high electric energy consumption of the existing direct current motor, and provides a double-flux-linkage magnetic core stator winding.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:

A double flux linkage magnetic core stator winding comprises a stator;

the stator comprises X iron cores arranged along the circumferential direction; each iron core is correspondingly provided with a stator coil; x is an integer;

The special feature is that:

the magnetic steel is arranged on the X groups of stator magnetic steels in a one-to-one correspondence manner with the X iron cores; the iron core is formed by superposing silicon steel sheets;

Each group of stator magnetic steel comprises two stator magnetic steels; the two stator magnetic steels of each group are respectively arranged on two opposite sides of the corresponding iron core along the circumferential direction, the polarities of the two stator magnetic steels positioned on the same iron core are attracted, and the polarities of the two stator magnetic steels positioned between two adjacent iron cores are repelled.

Further, the iron core is provided with a mounting groove along the opposite sides of the circumferential direction respectively, and the stator magnetic steel is arranged in the mounting groove.

Further, the stator magnetic steel is arranged at the inner ends of the two opposite sides of the iron core along the circumferential direction.

Further, the magnetic flux of the stator magnetic steel is within 1500GS, and is preferably a permanent magnet with a magnetic flux of 750 GS.

Compared with the prior art, the utility model has the beneficial effects that:

The two stator magnetic steels arranged in the utility model can respectively form a magnetic linkage with the upper and lower parts of the corresponding iron core after being electrified, so that a mixed magnetic field with larger strength is formed by the two magnetic linkages and the iron core, and further, under the same condition, larger torque is obtained compared with the existing direct current motor, and more electricity is saved.

Drawings

FIG. 1 is a schematic diagram of an installation structure of a core, a stator coil and a stator magnetic steel in an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a core in an embodiment of the utility model;

Fig. 3 is a diagram of a magnetic field strength experimental device without stator magnetic steel on the existing iron core and with the stator magnetic steel on the iron core of the utility model.

In the figure: 1-stator coil, 2-iron core, 3-stator magnetic steel and 4-mounting groove.

Detailed Description

To further clarify the objects, advantages and features of the present utility model, a double flux core stator winding according to the present utility model will be described in more detail with reference to the drawings and the accompanying examples. The advantages and features of the present utility model will become more apparent from the following detailed description. It should be noted that: the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the utility model; second, the structures shown in the drawings are often part of the actual structure.

The embodiment provides a double-flux-linkage magnetic core stator winding, which is mainly applied to a brushless direct current motor, can generate a larger mixed magnetic field, and has larger torque and more power saving compared with the existing brushless direct current motor under the same conditions.

Existing stator windings generally include a stator. The stator includes X iron cores 2 arranged in a circumferential direction; x is an integer. The iron core 2 is formed by stacking silicon steel sheets. One stator coil 1 is provided on each core 2, that is, the number of stator coils 1 is also X.

In this embodiment, referring to fig. 1, a group of stator magnetic steels, that is, X groups of stator magnetic steels 3, are respectively disposed on each iron core 2. The stator magnetic steel 3 has a rectangular plate-like structure with a certain thickness. Each group of stator magnetic steel comprises two stator magnetic steels 3; the two stator magnetic steels 3 of each group are respectively arranged on two opposite sides of the corresponding iron core 2 along the circumferential direction, and the arrangement mode of the magnetic steels is as follows: the polarities of the two stator magnetic steels 3 positioned on the same iron core 2 are attracted, and the polarities of the two stator magnetic steels 3 positioned between two adjacent iron cores 2 are repelled. Specifically, referring to fig. 2, a mounting groove 4 is provided on each of opposite sides of the core 2 in the circumferential direction, and the mounting groove 4 is located at an inner end (i.e., an end near the geometric center of the stator) of the core 2, and the stator magnetic steel 3 is disposed in the mounting groove 4. The magnetic flux of the stator magnetic steel 3 is generally within 1500 Gs. Preferably, in the present embodiment, the stator magnetic steel 3 is a permanent magnet having a magnetic flux of 750 Gs.

Referring to fig. 1, a and b in the definition diagram are two current access ends of a stator coil 1, and A, B respectively represent two stator magnetic steels 3 on an iron core 2.

When positive current is fed to the end a of the stator coil in fig. 1 and negative current is fed to the end B, the magnetic field of the upper part (taking the up-down direction in the paper surface of fig. 1 as a reference) of the iron core 2 is N, and the lower part is S, so that a magnetic linkage is formed between the stator magnetic steel A in the iron core 2 and the upper part of the iron core 2, a magnetic linkage is also formed between the stator magnetic steel B in the iron core and the lower part of the iron core 2, and a mixed magnetic field is formed between the two magnetic linkages and the iron core 2; similarly, when the positive current is applied to the B end of the stator coil in fig. 1 and the negative current is applied to the a end, the magnetic field at the upper part of the iron core 2 in fig. 1 is S, and the magnetic field at the lower part is N, so that the B stator magnetic steel in the iron core 2 and the upper part of the iron core 2 form a magnetic linkage, the a stator magnetic steel in the iron core and the lower part of the iron core 2 form a magnetic linkage, and the two magnetic linkages and the iron core 2 form a mixed magnetic field.

Experiments and verification are carried out by combining the implementation principle, the experimental scene is referred to fig. 3, eight identical iron cores 2 (namely, an iron core ①, an iron core ②, an iron core ③, an iron core ④, an iron core ⑤, an iron core ⑥, an iron core ⑦ and an iron core ⑧) are fixed on an iron plate with the thickness of 4mm in a straight line at equal intervals, wherein an A stator magnetic steel and a B stator magnetic steel with magnetic flux of 750GS are arranged on the iron core ⑤-⑧, eight stator coils 1 are arranged on the eight iron cores 2 in a positive-negative sequence, the stator coils 1 are specifically made of three enamelled copper wires with the wire diameter of 1mm, the magnetic flux of the top of the iron core is smaller than 10Gs after being electrified, the test results are shown in table 1 (the unit of test data is Gs) after being electrified:

TABLE 1

From the above table, it can be seen that under the test environments of five different currents and voltages, the magnetic field intensities measured on the iron cores ⑤-⑧ provided with the stator magnetic steel a and the stator magnetic steel B are larger than the iron core ①-④ not provided with the stator magnetic steel B, so that by the method of arranging the stator magnetic steel on the iron cores, a magnetic field with larger intensity can be obtained in an electrified state, and a larger driving torque can be obtained, so that the motor is more power-saving in operation.

Claims (6)

1. A double flux linkage magnetic core stator winding comprises a stator;

The stator comprises X iron cores (2) arranged along the circumferential direction; each iron core (2) is correspondingly provided with a stator coil (1); x is an integer;

The method is characterized in that:

the magnetic steel also comprises X groups of stator magnetic steels which are arranged in one-to-one correspondence with the X iron cores (2);

Each group of stator magnetic steel comprises two stator magnetic steels (3); the two stator magnetic steels (3) of each group are respectively arranged on two opposite sides of the corresponding iron core (2) along the circumferential direction, the polarities of the two stator magnetic steels (3) positioned on the same iron core (2) are attracted, and the polarities of the two stator magnetic steels (3) positioned between the two adjacent iron cores (2) are repelled.

2. A double flux-linked magnetic core stator winding as defined in claim 1 wherein:

Two opposite sides of the iron core (2) along the circumferential direction are respectively provided with a mounting groove (4); the stator magnetic steel (3) is arranged in the mounting groove (4).

3. A double flux-linked core stator winding according to claim 1 or claim 2, wherein:

The stator magnetic steel (3) is arranged at the inner ends of the two opposite sides of the iron core (2) along the circumferential direction.

4. A dual flux-linked magnetic core stator winding as defined in claim 3 wherein:

the iron core (2) is formed by superposing silicon steel sheets.

5. A dual flux linkage magnetic core stator winding as defined in claim 4 wherein:

the magnetic flux of the stator magnetic steel (3) is within 1500 GS.

6. A dual flux linkage magnetic core stator winding as defined in claim 5 wherein:

the stator magnetic steel (3) is a permanent magnet with magnetic flux of 750 GS.