Motor capable of improving magnetic induction intensity

Abstract

The utility model provides a motor capable of improving magnetic induction intensity. The motor comprises a housing, one end of the housing is provided with a front end cover, the other end of the housing is provided with a rear end cover, the inner wall of the housing is provided with a stator, the housing is internally provided with a rotating shaft penetrating through the front end cover and the rear end cover, and the side wall of the rotating shaft is provided with a rotor. The rotor comprises a rotor core arranged on the side wall of the rotating shaft, a plurality of mounting grooves distributed in a splayed shape are uniformly formed in the side wall of the rotor core, MT magnetic steel permanent magnets are arranged in the mounting grooves, magnetic pole curve grooves extend from the sides, close to the rotating shaft, of the adjacent mounting grooves, and the adjacent magnetic pole curve grooves are symmetrically distributed and communicated with the mounting grooves; the permanent magnet motor rotor has the advantages that the structure is reasonable, the magnetic induction intensity is high, and the heat dissipation effect is good.

Description

Technical Field

[0001] The utility model relates to a motor, in particular to a motor capable of improving magnetic induction intensity. Background Art

[0002] Motor design is a multi-physics domain design problem. In addition to electromagnetic simulation, magnetic thermal coupling is required, taking into account electromagnetic and heat dissipation performance. The motor usually has a permanent magnet that provides a constant magnetic field, a stator consisting of a winding and an iron core. When current flows through the winding, a magnetic field is generated. A rotor with a permanent magnet or a structure with permanent magnets embedded in the iron core, bearings that support the rotor and enable it to rotate freely, and end covers to protect the internal components of the motor. There is also an electromagnetic field generated by the winding current, which interacts with the magnetic field of the permanent magnet, thereby driving the motor to rotate.

[0003] In the prior art, the selection of magnetic steel in the motor is very critical for permanent magnet motors. In a high temperature environment, the performance of the magnetic steel may decline, resulting in a reduction in magnetic flux, affecting the performance of the motor. Second, magnetic saturation. When the magnetic flux density reaches a certain value, the magnetic steel may experience magnetic saturation, thereby limiting the output power of the motor. Third, demagnetization. Under the influence of external magnetic fields, temperature or mechanical stress for a long time, the magnetic steel may demagnetize, reducing its magnetism, resulting in low magnetic induction intensity. In addition, when the motor is in a medium or low speed operation state, the heat generated by the stator part will increase significantly, of which the main heat source comes from the loss inside the stator winding and the core. As the speed increases to the high speed range, the heating problem of the motor rotor assembly will become particularly prominent. If effective heat dissipation measures cannot be implemented for the stator or rotor of the drive motor, this will directly affect the overall energy efficiency of the motor, resulting in a significant reduction in the reliability, stability and energy efficiency of the motor during operation. Now there is an urgent need for a motor that can improve the magnetic induction intensity to solve the above problems. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a motor that can improve the magnetic induction intensity to solve the problems raised in the above background technology. The utility model has a reasonable structure, high magnetic induction intensity and good heat dissipation effect.

[0005] In order to achieve the above object, the utility model is implemented through the following technical solution: a motor capable of improving magnetic induction intensity, comprising:

[0006] A housing, one end of the housing is provided with a front end cover, the other end of the housing is provided with a rear end cover, the inner wall of the housing is provided with a stator, the inside of the housing is provided with a rotating shaft penetrating the front end cover and the rear end cover, and the side wall of the rotating shaft is provided with a rotor;

[0007] The rotor comprises a rotor core arranged on the side wall of the rotating shaft, a plurality of mounting grooves evenly arranged on the side wall of the rotor core and distributed in an eight-shaped pattern, MT permanent magnets are arranged inside the mounting grooves, and magnetic pole curve grooves are extended on the side of adjacent mounting grooves close to the rotating shaft, and adjacent magnetic pole curve grooves are symmetrically distributed and communicated with the mounting grooves;

[0008] The pole curve slot is a triangular slot with chamfered corners.

[0009] Furthermore, the stator includes a stator core arranged on the inner wall of the shell, at least one stator winding assembly is arranged inside the stator core, and the stator winding assembly includes at least one stator winding coil.

[0010] Furthermore, a plurality of placement slots are evenly arranged on the side wall of the stator core, the stator winding assembly is wound by copper wire, and the stator winding assembly is inserted into the placement slots.

[0011] Furthermore, an insulating slot paper for isolating the stator winding coil and the stator core is arranged inside the placement slot, a stator winding outlet slot is opened inside the placement slot, an insulating isolation sheet for blocking the stator winding outlet slot is inserted inside the placement slot, and the outlet end of the stator winding assembly connects the stator winding coil with the three-phase wire in the lead-out wire through a lead-out wire. The lead-out wire includes a three-phase wire, five Hall wires and an insulating sheath. The three-phase wire and the five Hall wires are all placed inside the insulating sheath, and a heat shrink tube is covered at the end of the insulating sheath of the lead-out wire.

[0012] Furthermore, the stator core and the rotor core are both formed by laminating a plurality of silicon steel sheets.

[0013] Furthermore, a motor Hall component for detecting the position and speed of the rotor is provided inside the stator core;

[0014] The motor Hall assembly includes a Hall sensor and a Hall circuit board arranged inside the stator core. The Hall sensor is electrically connected to the Hall circuit board, and five Hall wires are connected to the Hall circuit board.

[0015] Furthermore, a first bearing and a second bearing are respectively provided at the connection places between the rotating shaft and the front end cover and the rear end cover.

[0016] Furthermore, a fan is arranged on the side of the rotating shaft away from the rear end cover, a protective cover for covering the fan is arranged on the side wall of the rear end cover, an air inlet is opened on the side of the protective cover away from the rear end cover, a plurality of air outlet holes arranged inside the protective cover and used for blowing air to the side wall of the outer shell are opened on the side wall of the rear end cover, and bolts are arranged between the protective cover and the rear end cover.

[0017] Furthermore, the shell is made of heat dissipation material.

[0018] Furthermore, the MT permanent magnet is square and its corners are chamfered.

[0019] According to the utility model, a motor capable of improving magnetic induction intensity can generate a strong magnetic field by using MT permanent magnets, and the magnetism is relatively stable and not easily affected by external factors. The MT permanent magnets are distributed in an eight-shaped shape to increase the magnetic flux. The eight-shaped distribution can make the magnetic flux more concentrated, thereby improving the magnetic induction intensity of the MT permanent magnets and improving the uniformity of the magnetic field. This distribution method can make the magnetic field more uniform within a certain range and reduce the distortion of the magnetic field. The MT permanent magnets are arranged in an eight-shaped shape to reduce the magnetic resistance in the magnetic circuit and improve the utilization rate of magnetic energy. In addition, the triangular grooves with chamfers extending from the installation grooves are arranged as pole curve grooves in an eight-shaped shape, which helps to change the path and distribution of the magnetic flux, thereby improving the magnetic induction intensity and magnetic field uniformity of the motor, improving the torque output and efficiency of the motor, helping to reduce the vibration and noise of the motor, and improving the stability of operation.

[0020] The fan is driven by a rotating shaft to allow air to enter from the air inlet and flow out from the air outlet to cool the side wall of the shell, thereby accelerating the speed of heat dissipation for the stator and rotor and enhancing the heat dissipation effect. At the same time, the shell is made of heat dissipation material, which is convenient for heat dissipation of the stator and enhances the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Other features, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0022] Figure 1 It is a structural schematic diagram of a motor capable of improving magnetic induction intensity according to an embodiment of the utility model;

[0023] Figure 2 It is a schematic structural diagram of a rotor in a motor capable of improving magnetic induction intensity according to an embodiment of the utility model;

[0024] Figure 3 According to an embodiment of the present utility model Figure 2 A magnified view of middle;

[0025] Figure 4 It is a schematic structural diagram of a rotor core in a motor capable of improving magnetic induction intensity according to an embodiment of the utility model;

[0026] Figure 5 It is a structural schematic diagram of a stator in a motor capable of improving magnetic induction intensity according to an embodiment of the utility model;

[0027] Figure 6 It is a structural schematic diagram of a MT magnetic steel permanent magnet in a motor capable of improving magnetic induction intensity according to an embodiment of the utility model;

[0028] Figure 7 It is a structural schematic diagram of a stator core in a motor capable of improving magnetic induction intensity according to an embodiment of the utility model;

[0029] In the figure: 1, rotating shaft; 2, first bearing; 3, front end cover; 4, housing; 5, stator; 51, stator core; 511, placement slot; 52, stator winding assembly; 521, stator winding coil; 5211, stator winding outlet slot; 6, rotor; 61, rotor core; 62, mounting slot; 63, MT magnetic steel permanent magnet; 64, magnetic pole curve slot; 7, second bearing; 8, fan; 9, protective cover; 91, air inlet; 10, rear end cover; 101, air outlet; 11, insulating slot paper; 12, insulating spacer; 13, motor Hall assembly; 131, Hall sensor; 132, Hall circuit board; 14, lead wire; 15, three-phase line. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0031] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model provides a technical solution: a motor capable of improving magnetic induction intensity, comprising:

[0032] A housing 4, a front end cover 3 is disposed at one end of the housing 4, a rear end cover 10 is disposed at the other end of the housing 4, a stator 5 is disposed on the inner wall of the housing 4, a rotating shaft 1 penetrating the front end cover 3 and the rear end cover 10 is disposed inside the housing 4, and a rotor 6 is disposed on the side wall of the rotating shaft 1;

[0033] The rotor 6 includes a rotor core 61 arranged on the side wall of the rotating shaft 1. The side wall of the rotor core 61 is evenly provided with a plurality of mounting grooves 62 distributed in an eight-shaped pattern. MT magnetic steel permanent magnets 63 are arranged inside the mounting grooves 62. A magnetic pole curve groove 64 is extended on one side of the adjacent mounting grooves 62 close to the rotating shaft 1. The adjacent magnetic pole curve grooves 64 are symmetrically distributed and communicate with the mounting grooves 62.

[0034] The magnetic pole curve slot 64 is a triangular slot with chamfers. This design uses MT permanent magnets 63, whose material is between ferrite and neodymium iron boron. It has excellent magnetic properties such as high magnetic induction intensity, high magnetic energy product, and high coercive force, and can generate a strong magnetic field. In addition, the magnetism is relatively stable and not easily affected by external factors. The MT permanent magnets 63 are distributed in an eight-shaped shape to increase the magnetic flux. The eight-shaped distribution can make the magnetic flux more concentrated, thereby increasing the magnetic induction intensity of the MT permanent magnets 63 and improving the uniformity of the magnetic field. This distribution method can make the magnetic field more uniform within a certain range and reduce the distortion of the magnetic field. The MT permanent magnets 63 are arranged in an eight-shaped shape to reduce the magnetic resistance in the magnetic circuit and improve the utilization rate of magnetic energy. In addition, the triangular grooves with chamfers extending from the mounting grooves 62 are arranged in an eight-shaped shape as the magnetic pole curve grooves 64, which are helpful to change the path and distribution of the magnetic flux, thereby improving the magnetic induction intensity and magnetic field uniformity of the motor, improving the torque output and efficiency of the motor, helping to reduce the vibration and noise of the motor, and improving the stability of operation.

[0035] Reference Figure 1 and Figure 5 The stator 5 includes a stator core 51 arranged on the inner wall of the shell 4, and at least one stator winding assembly 52 is arranged inside the stator core 51. The stator winding assembly 52 includes at least one stator winding coil 521. The design uses the stator winding assembly 52, and its main function is to generate a rotating magnetic field, thereby driving the rotor 6 to rotate. Specifically, when alternating current passes through the stator winding assembly 52, an alternating magnetic flux is generated. This magnetic flux interacts with the conductor in the rotor 6 to generate an electromagnetic torque, causing the rotor 6 to rotate.

[0036] Reference Figure 5 and Figure 7 A plurality of placement slots 511 are evenly arranged on the side wall of the stator core 51. The stator winding assembly 52 is wound by copper wire. The stator winding assembly 52 is inserted into the placement slots 511. This design improves the heat dissipation effect of the motor by evenly distributing the placement slots 511.

[0037] Reference Figure 5The placement slot 511 is provided with an insulating slot paper 11 for isolating the stator winding coil 521 from the stator core 51, the placement slot 511 is provided with a stator winding outlet slot 5211, the placement slot 511 is plugged with an insulating isolation sheet 12 for blocking the stator winding outlet slot 5211, and the outlet end of the stator winding assembly 52 connects the stator winding coil 521 with the three-phase line 15 in the lead-out line 14 through a lead-out line 14, The lead wire 14 includes a three-phase wire, five Hall wires and an insulating sheath. The three-phase wire and the five Hall wires are placed inside the insulating sheath. The end of the insulating sheath of the lead wire 14 is covered with a heat shrink tube. Waterproof glue is applied inside the heat shrink tube. After the heat shrink tube shrinks, a sealed opening is formed. This design can insulate and protect the stator winding assembly 52, prevent short circuits or other faults between the stator winding assembly 52 and the stator core 51, and facilitate connection with the three-phase wire 15.

[0038] Reference Figure 1 , Figure 2 and Figure 7 The stator core 51 and the rotor core 61 are both formed by laminating a plurality of silicon steel sheets, which improves the rationality of the design.

[0039] Reference Figure 5 , a motor Hall component 13 for detecting the position and speed of the rotor 6 is arranged inside the stator core 51;

[0040] The motor Hall assembly 13 includes a Hall sensor 131 and a Hall circuit board 132 arranged inside the stator core 51. The Hall sensor 131 is electrically connected to the Hall circuit board 132, and five Hall wires are connected to the Hall circuit board 132. In this design, when the rotor 6 rotates, the MT permanent magnet 63 or the magnetic pole passes through the Hall sensor 131, causing the magnetic field around the Hall sensor 131 to change. This change is detected by the Hall sensor 131 and converted into an electrical signal output through the Hall circuit board 132. By processing these electrical signals, the position and speed of the rotor 6 can be determined, and the interaction between them generates a rotating magnetic field, thereby driving the motor to operate. An insulating sheet is arranged between the Hall circuit board 132 and the stator winding assembly 52.

[0041] Reference Figure 1The first bearing 2 and the second bearing 7 are respectively provided at the connection between the rotating shaft 1 and the front cover 3 and the rear cover 10. This design improves the stability of the rotation of the rotating shaft 1. A fan 8 is provided on the side of the rotating shaft 1 away from the rear cover 10. A protective cover 9 for covering the fan 8 is provided on the side wall of the rear cover 10. An air inlet 91 is provided on the side of the protective cover 9 away from the rear cover 10. A plurality of air outlet holes 101 disposed inside the protective cover 9 and used for blowing air to the side wall of the housing 4 are provided on the side wall of the rear cover 10. Bolts are provided between the protective cover 9 and the rear cover 10. This design drives the fan 8 to rotate by using the rotating shaft 1 so that the wind is blown from the air inlet 9. 1 enters and flows out from the air outlet 101 to cool the side wall of the shell 4 by blowing air, thereby accelerating the speed of heat dissipation of the stator 5 and the rotor 6 and enhancing the heat dissipation effect. The front end cover 3, the rear end cover 10 and the shell 4 form a motor closed space, which can prevent dust, moisture and other debris from entering the inside of the motor and protect the key components inside. The space formed by the front end cover 3, the rear end cover 10 and the shell 4 can reduce the electromagnetic interference of the motor to the outside world, and also prevent the electromagnetic interference from the outside world from affecting the normal operation of the motor. The shell 4 is made of heat dissipation material. This design facilitates the heat dissipation of the stator 5 by using the shell 4, thereby enhancing the heat dissipation effect.

[0042] Reference Figure 6 The MT permanent magnet 63 is square and has chamfers at its corners. This design uses chamfers to remove burrs on the edges of the MT permanent magnet 63, making it smoother and reducing wear on other parts. Secondly, chamfers can avoid stress concentration on right-angle edges and improve the strength and durability of the MT permanent magnet 63.

[0043] Reference Figure 1-Figure 7 As an embodiment of the utility model: when it is necessary to use the motor, by using the MT magnetic steel permanent magnet 63, a strong magnetic field can be generated, and the magnetism is relatively stable and not easily affected by external factors, and the MT magnetic steel permanent magnet 63 is distributed in an eight-shaped shape to increase the magnetic flux. The eight-shaped distribution can make the magnetic flux more concentrated, thereby increasing the magnetic induction intensity of the MT magnetic steel permanent magnet 63 and improving the uniformity of the magnetic field. This distribution method can make the magnetic field more uniform within a certain range and reduce the distortion of the magnetic field. The MT magnetic steel permanent magnet 63 is arranged in an eight-shaped shape to reduce the magnetic resistance in the magnetic circuit and improve the utilization rate of the magnetic energy. In addition, the triangular groove with chamfers extending from the mounting groove 62 is a magnetic pole curve groove 64, which is also arranged in an eight-shaped shape, which helps to change the path and distribution of the magnetic flux, thereby improving the magnetic induction intensity and magnetic field uniformity of the motor, improving the torque output and efficiency of the motor, helping to reduce the vibration and noise of the motor, and improving the stability of operation.

[0044] The rotating shaft 1 is used to drive the fan 8 to rotate so that wind enters from the air inlet 91 and flows out from the air outlet 101 to blow air to cool the side wall of the shell 4, thereby accelerating the speed of heat dissipation for the stator 5 and the rotor 6 and enhancing the heat dissipation effect. At the same time, the shell 4 is made of heat dissipation material, which is convenient for heat dissipation of the stator 5, enhancing the heat dissipation effect, and improving the practicality of the utility model.

[0045] The above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic features of the utility model. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description, and it is intended to include all changes within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0046] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A motor capable of improving magnetic induction intensity, comprising: A housing (4), wherein a front end cover (3) is disposed at one end of the housing (4), a rear end cover (10) is disposed at the other end of the housing (4), a stator (5) is disposed on the inner wall of the housing (4), a rotating shaft (1) penetrating the front end cover (3) and the rear end cover (10) is disposed inside the housing (4), and a rotor (6) is disposed on the side wall of the rotating shaft (1); It is characterized in that The rotor (6) comprises a rotor core (61) arranged on a side wall of a rotating shaft (1); a plurality of mounting grooves (62) distributed in an eight-shaped pattern are evenly formed on the side wall of the rotor core (61); MT magnetic steel permanent magnets (63) are arranged inside the mounting grooves (62); magnetic pole curve grooves (64) are extended on one side of adjacent mounting grooves (62) close to the rotating shaft (1); and adjacent magnetic pole curve grooves (64) are symmetrically distributed and communicate with the mounting grooves (62); The magnetic pole curve groove (64) is a triangular groove with chamfered corners.

2. A motor capable of improving magnetic induction intensity according to claim 1, characterized in that: The stator (5) comprises a stator core (51) arranged on the inner wall of the housing (4), at least one stator winding assembly (52) is arranged inside the stator core (51), and the stator winding assembly (52) comprises at least one stator winding coil (521).

3. A motor capable of improving magnetic induction intensity according to claim 2, characterized in that: The side wall of the stator core (51) is evenly provided with a plurality of placement slots (511); the stator winding assembly (52) is wound from copper wire; and the stator winding assembly (52) is inserted into the placement slots (511).

4. A motor capable of improving magnetic induction intensity according to claim 3, characterized in that: An insulating slot paper (11) for isolating the stator winding coil (521) from the stator core (51) is arranged inside the placement slot (511); a stator winding outlet slot (5211) is provided inside the placement slot (511); an insulating isolation sheet (12) for blocking the stator winding outlet slot (5211) is inserted inside the placement slot (511); the outlet end of the stator winding assembly (52) connects the stator winding coil (521) to the three-phase wire (15) in the lead-out wire (14) through a lead-out wire (14); the lead-out wire (14) includes a three-phase wire (15), five Hall wires and an insulating sheath; the three-phase wire (15) and the five Hall wires are all placed inside the insulating sheath; and a heat shrink tube is sheathed at the end of the insulating sheath of the lead-out wire (14).

5. The motor capable of improving magnetic induction intensity according to claim 4, characterized in that: The stator iron core (51) and the rotor iron core (61) are both formed by stacking a plurality of silicon steel sheets.

6. The motor capable of improving magnetic induction intensity according to claim 4, characterized in that: A motor Hall component (13) for detecting the position and speed of the rotor (6) is arranged inside the stator core (51); The motor Hall assembly (13) comprises a Hall sensor (131) and a Hall circuit board (132) arranged inside the stator core (51); the Hall sensor (131) is electrically connected to the Hall circuit board (132); and the five Hall wires are connected to the Hall circuit board (132).

7. The motor capable of improving magnetic induction intensity according to claim 1, characterized in that: A first bearing (2) and a second bearing (7) are respectively provided at the connection points between the rotating shaft (1) and the front end cover (3) and the rear end cover (10).

8. The motor capable of improving magnetic induction intensity according to claim 1, characterized in that: A fan (8) is arranged on the side of the rotating shaft (1) away from the rear end cover (10); a protective cover (9) for covering the fan (8) is arranged on the side wall of the rear end cover (10); an air inlet (91) is provided on the side of the protective cover (9) away from the rear end cover (10); a plurality of air outlets (101) are arranged inside the protective cover (9) and for blowing air to the side wall of the outer shell (4); and bolts are arranged between the protective cover (9) and the rear end cover (10).

9. The motor capable of improving magnetic induction intensity according to claim 1, characterized in that: The housing (4) is made of heat dissipation material.

10. The motor capable of improving magnetic induction intensity according to claim 1, characterized in that: The MT magnetic steel permanent magnet (63) is square and has chamfers at its corners.

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