Double-flux-linkage magnetic core stator winding

Abstract

The invention belongs to the field of direct current motors, and particularly relates to a double-flux-linkage magnetic core stator winding. Comprising a stator; the stator comprises X iron cores arranged in the circumferential direction. A stator coil is correspondingly arranged on each iron core; the motor also comprises X groups of stator magnetic steels which are arranged in one-to-one correspondence with the X iron cores. Each group of stator magnetic steel comprises two pieces of stator magnetic steel; the two stator magnetic steels in each group are respectively arranged on the two opposite sides of the corresponding iron core along the circumferential direction, the polarities of the two stator magnetic steels on the same iron core attract each other, and the polarities of the two stator magnetic steels between the two adjacent iron cores repel each other. When the stator winding is adopted in the direct-current motor, larger torque can be obtained compared with an existing direct-current motor, and more electricity is saved.

Description

Technical Field

[0001] The present invention relates to a stator winding, and more particularly to a magnetic core stator winding with double magnetic chains. Background Art

[0002] A DC motor is a rotating electric machine that can convert direct current into mechanical energy or convert mechanical energy into direct current. When it operates as a motor, it can convert electrical energy into mechanical energy; when it operates as a generator, it is a DC generator and can convert mechanical energy into electrical energy.

[0003] The structure of an existing DC motor generally includes a stator, a rotor, and a housing. The part that remains stationary during the operation of the DC motor is called the stator, and the main function of the stator is to generate a magnetic field, which is composed of a frame, magnetic poles, a commutating pole, end covers, bearings, and a brush device, etc. The part that rotates during the operation of the DC motor is called the rotor, and its main function is to generate electromagnetic torque and induced electromotive force. It is the hub for energy conversion in the DC motor, so it is usually called the armature, which is composed of a rotor magnet, a rotating shaft, an armature core, an armature winding, a commutator, and a fan, etc.

[0004] The working principle of an existing DC motor mainly uses an iron core plus a coil winding. By reversing the current in the coil winding, the pushing and pulling movement of the rotor magnet is realized, thereby driving the rotor to rotate. It has problems such as low torque and high power consumption. Summary of the Invention

[0005] The purpose of the present invention is to solve the technical problems of low torque and high power consumption existing in the existing DC motor, and to provide a magnetic core stator winding with double magnetic chains.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A magnetic core stator winding with double magnetic chains includes a stator;

[0008] The stator includes X iron cores arranged along the circumferential direction; a stator coil is correspondingly arranged on each iron core; X is an integer;

[0009] The special feature is that:

[0010] It further includes X groups of stator magnets arranged in one-to-one correspondence with the X iron cores; the iron cores are formed by stacking silicon steel sheets;

[0011] Each group of stator magnets includes two stator magnets; the two stator magnets in each group are respectively arranged on the opposite sides of the corresponding iron core along the circumferential direction, and the two stator magnets on the same iron core attract each other in polarity, and the two stator magnets between adjacent two iron cores repel each other in polarity.

[0012] Furthermore, an installation groove is respectively arranged on the opposite sides of the iron core along the circumferential direction, and the stator magnet is arranged in the installation groove.

[0013] Further, the stator magnets are arranged at the inner ends of the opposite sides of the iron core in the circumferential direction.

[0014] Further, the magnetic flux of the stator magnets is within 1500 GS, preferably a permanent magnet with a magnetic flux of 750 GS.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] In the present invention, the two stator magnets are arranged, and after being energized, a magnetic chain can be respectively formed with the upper and lower parts of the corresponding iron core, so as to form a stronger hybrid magnetic field with the iron core through the two magnetic chains. Furthermore, under the same conditions, a larger torque can be obtained compared with the existing DC motor, and more power can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the installation structure of the iron core, stator coil and stator magnet in the embodiment of the present invention;

[0018] Figure 2 Is a cross-sectional view of the iron core in the embodiment of the present invention;

[0019] Figure 3 Is an experimental device diagram of the magnetic field intensity of the existing iron core without stator magnets and the iron core of the present invention with stator magnets.

[0020] In the figure: 1 - stator coil, 2 - iron core, 3 - stator magnet, 4 - installation groove. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] To make the objectives, advantages and features of the present invention clearer, the following further describes in detail a magnetic core stator winding with double magnetic chains proposed by the present invention in combination with the accompanying drawings and specific embodiments. According to the following specific embodiments, the advantages and features of the present invention will be clearer. It should be noted that: the drawings are all in a very simplified form and use non-precise scales, only for conveniently and clearly assisting in explaining the objectives of the embodiments of the present invention; secondly, the structures shown in the drawings are often part of the actual structures.

[0022] This embodiment provides a magnetic core stator winding with double magnetic chains, which is mainly applied to a brushless DC motor and can generate a larger hybrid magnetic field. Compared with the existing brushless DC motor, a larger torque can be generated under the same conditions, and more power can be saved.

[0023] The existing stator winding generally includes a stator. The stator includes X iron cores 2 arranged in the circumferential direction; X is an integer. The iron cores 2 are formed by stacking silicon steel sheets. A stator coil 1 is correspondingly arranged on each iron core 2, that is, the number of stator coils 1 is also X.

[0024] In this embodiment, reference Figure 1 , a group of stator magnets 3 is respectively arranged on each core 2, that is, the number of stator magnets 3 is X groups. The stator magnet 3 is a rectangular plate structure with a certain thickness. Each group of stator magnets includes two stator magnets 3; the two stator magnets 3 of each group are respectively arranged on opposite sides of the corresponding core 2 along the circumferential direction, and the magnets are arranged in such a way that the two stator magnets 3 located on the same core 2 attract each other in polarity, and the two stator magnets 3 located between two adjacent cores 2 repel each other in polarity. Specifically, refer to Figure 2 , a mounting groove 4 is respectively provided on two opposite sides of the iron core 2 along the circumferential direction, and the mounting groove 4 is located at the inner end of the iron core 2 (the inner end is the end close to the geometric center of the stator), and the stator magnetic steel 3 is arranged in the mounting groove 4. The magnetic flux of the stator magnetic steel 3 is generally within 1500Gs. Preferably, in this embodiment, the stator magnetic steel 3 is a permanent magnet with a magnetic flux of 750Gs.

[0025] refer to Figure 1 , a and b in the definition figure are the two current access terminals of the stator coil 1, and A and B represent the two stator magnets 3 on the iron core 2.

[0026] When giving Figure 1 When the positive current is passed through the stator coil a end and the negative current is passed through the b end, the upper part of the core 2 (with Figure 1 The up and down directions on the paper are used as references) and the magnetic field is N, and the lower part is S. Then the stator magnet A in the core 2 will form a magnetic link with the upper part of the core 2, and the stator magnet B in the core will also form a magnetic link with the lower part of the core 2. The two magnetic links and the core 2 form a mixed magnetic field. Similarly, when Figure 1 When the positive current flows through the b end of the stator coil and the negative current flows through the a end, Figure 1 The magnetic field of the upper part of the core 2 is S, and that of the lower part is N. Then the B stator magnet in the core 2 will form a magnetic linkage with the upper part of the core 2, and the A stator magnet in the core will also form a magnetic linkage with the lower part of the core 2. The two magnetic linkages and the core 2 form a mixed magnetic field.

[0027] Combined with the above implementation principles, experimental verification is carried out, and the experimental scenario reference Figure 3, eight identical iron cores 2 (iron core ①, iron core ②, iron core ③, iron core ④, iron core ⑤, iron core ⑥, iron core ⑦, iron core ⑧ respectively) are fixed on a 4-mm-thick iron plate at equal intervals in a row. Among them, A stator magnet and B stator magnet with a magnetic flux of 750 GS are arranged on iron cores ⑤ - ⑧. Eight stator coils 1 are arranged on the eight iron cores 2 in an alternating positive and negative order. The stator coil 1 is specifically made of three enameled copper wires with a wire diameter of 1 mm. Before power-on, the magnetic flux at the tooth tip of the iron core is measured by a gauss meter and is less than 10 Gs. After power-on, it is measured using a gauss meter, and the test results are shown in Table 1 (the unit of the test data is Gs):

[0028] Table 1

[0029]

[0030]

[0031]

[0032] As can be seen from the above table, in the test environments of five different currents and voltages, the magnetic field intensities measured on iron cores ⑤ - ⑧ with A stator magnet and B stator magnet are all greater than those on iron cores ① - ④ without stator magnet. Thus, it can be seen that by the method of arranging stator magnets on the iron core in this application, a stronger magnetic field can be obtained in the powered-on state, and thus a greater driving torque can be obtained, making the motor more power-saving during operation.

Claims

1. A magnetic core stator winding with double magnetic chains, comprising a stator; The stator includes X iron cores (2) arranged in the circumferential direction; a stator coil (1) is correspondingly arranged on each iron core (2); X is an integer; It is characterized in that: It further includes X groups of stator magnetic steels arranged in one-to-one correspondence with the X iron cores (2); Each group of stator magnetic steels includes two stator magnetic steels (3); the two stator magnetic steels (3) of each group are respectively arranged on the opposite sides of the corresponding iron core (2) in the circumferential direction, and the two stator magnetic steels (3) on the same iron core (2) attract each other in polarity, and the two stator magnetic steels (3) between two adjacent iron cores (2) repel each other in polarity.

2. A magnetic core stator winding with double magnetic chains according to claim 1, It is characterized in that: One mounting groove (4) is respectively arranged on the opposite sides of the iron core (2) in the circumferential direction; the stator magnetic steel (3) is arranged in the mounting groove (4).

3. A magnetic core stator winding with double magnetic chains according to claim 1 or 2, It is characterized in that: The stator magnetic steel (3) is arranged at the inner ends of the opposite sides of the iron core (2) in the circumferential direction.

4. A magnetic core stator winding with double magnetic chains according to claim 3, It is characterized in that: The iron core (2) is formed by stacking silicon steel sheets.

5. A magnetic core stator winding with double magnetic chains according to claim 4, It is characterized in that: The magnetic flux of the stator magnetic steel (3) is within 1500 GS.

6. A magnetic core stator winding with double magnetic chains according to claim 5, It is characterized in that: The stator magnetic steel (3) is a permanent magnet with a magnetic flux of 750 GS.

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