Permanent magnet synchronous motor rotor and permanent magnet synchronous motor

Abstract

The utility model provides a permanent magnet synchronous motor rotor, which comprises a top wall, a side wall and a plurality of magnets, the top wall and the side wall are integrally formed and enclose an accommodating space with an opening, and the plurality of magnets are accommodated in the accommodating space and are fixedly arranged on the side surface, close to the accommodating space, of the side wall in a Halbach array manner. The rotor is simple in structure, convenient to assemble and high in reliability. Meanwhile, the utility model also provides a motor adopting the rotor.

Description

Technical Field

[0001] The utility model relates to a permanent magnet synchronous motor rotor and a motor adopting the permanent magnet synchronous motor rotor. Background Art

[0002] The motor structure of the prior art is as follows Figure 1 , Figure 2 and Figure 3 As shown, the motor 30 includes a rotor housing 31, a plurality of magnets 33, a winding coil 35, a stator base 37 and a motor shaft 39. The rotor housing 31 and the stator base 37 are assembled to form a receiving space to receive the plurality of magnets 33 and the winding assembly 35.

[0003] The rotor housing 31 includes a cover 311 and an annular magnetic steel ring 313 . The cover 311 and the annular magnetic steel ring 313 are fixed together by colloid, and the plurality of magnets 33 are fixed to the inner surface of the annular magnetic steel ring 313 by colloid.

[0004] The motor shaft 39 passes through the rotor housing 31 and the stator base 37 in sequence, and the motor shaft 39 and the rotor housing 31 are fixed to each other by screws and screw holes, so as to realize the relative synchronous rotation of the motor shaft 39 and the rotor housing 31. The motor shaft 39 and the stator base 37 are relatively fixed in rotation by bearings, that is, when the motor shaft 39 rotates, the stator base 37 is relatively stationary, and the two do not rotate synchronously.

[0005] When the motor 30 is assembled, its structure is as follows Figure 4 shown.

[0006] When assembling the motor 30 , the rotor includes a rotor cover 311 , an annular magnetic steel ring 313 , and a plurality of magnets 33 , which are fixed together by colloid.

[0007] When the motor 30 is working, the motor shaft 39 rotates synchronously with the stator at a high speed, and the cover body 311 of the rotor housing 31, the annular magnetic steel ring 313 and the multiple magnets 33 rotate synchronously at a high speed. When the speed is too high, it is easy to cause the cover body 311, the annular magnetic steel ring 313 and the multiple magnets 33 to separate and fall off from each other, thereby affecting the reliability of the motor 30.

[0008] On the other hand, it is well known that the weight of a drone is an important factor affecting its endurance. In the motor 30 of the prior art, the material density of the annular magnetic steel ring 313 causes the overall weight to be heavier, thereby reducing its endurance.

[0009] Furthermore, since the cover body 311 and the annular magnetic steel ring 313 are disposed separately from each other, the assembly process is complicated.

[0010] In view of the above defects, it is necessary to provide a motor with a new structure for use in the field of drones to effectively solve the above technical problems. Utility Model Content

[0011] In view of the technical problems in the prior art that the magnetic steel ring and magnets in the motor are easy to fall off, the overall weight is heavy and the assembly is inconvenient, the utility model provides a permanent magnet synchronous motor rotor with reliable structure, light overall weight and convenient assembly.

[0012] At the same time, the utility model also provides a motor using the permanent magnet synchronous motor rotor.

[0013] A permanent magnet synchronous motor rotor comprises a top wall, a side wall and a plurality of magnets. The top wall and the side wall are integrally formed and enclose a receiving space with an opening. The plurality of magnets are received in the receiving space and are fixed on the side wall in a Halbach array near the side surface of the receiving space.

[0014] A permanent magnet synchronous motor comprises a stator, a rotating shaft and a rotor, wherein the stator comprises a base, a bearing assembly sleeved on the base and a winding coil, the winding coil is fixed to the base and is relatively stationary with the base and the bearing assembly, one end of the rotating shaft is fixed to the bearing assembly and is pivotally connected relative to the bearing assembly, the rotor is fixed to the rotating shaft and rotates synchronously with the rotor, the rotor comprises a top wall, a side wall and a plurality of magnets, the top wall and the side wall are integrally formed and enclose a receiving space with an opening, the plurality of magnets are received in the receiving space and are fixed to the side wall in a Halbach array adjacent to the side surface of the receiving space.

[0015] Compared with the related art, in the permanent magnet synchronous motor of the utility model, the top wall and the side wall of the rotor are set as an integrated structure, and both are made of aluminum or carbon fiber materials with low density, and processed by digital control processing technology or injection molding technology, so as to reduce the weight of the rotor shell and improve the endurance. At the same time, the top wall and the side wall are formed in one piece, the number of components is reduced, the assembly process is simplified, and the use of colloid to bond the top wall and the side wall is omitted, so as to improve the product reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a three-dimensional assembly diagram of a motor disclosed in the prior art;

[0018] Figure 2 yes Figure 1 A three-dimensional assembly schematic diagram of the motor from another angle;

[0019] Figure 3 yes Figure 1 A three-dimensional exploded schematic diagram of the motor shown;

[0020] Figure 4 yes Figure 1 a side cutaway view of the motor shown;

[0021] Figure 5 It is a three-dimensional assembly schematic diagram of a motor disclosed by the utility model;

[0022] Figure 6 yes Figure 5 Another perspective assembly diagram of the motor shown;

[0023] Figure 7 yes Figure 5 A three-dimensional exploded schematic diagram of the motor shown;

[0024] Figure 8 yes Figure 5 A cross-sectional view of the motor shown. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Please refer to Figure 5 and Figure 6 ,in Figure 5 This is a schematic diagram of the three-dimensional structure of the motor disclosed in the utility model. Figure 6 for Figure 5 The motor 10 is a power module for driving the propeller of the drone, which receives the control signal from the electronic regulator and outputs the rotational power to drive the propeller to rotate at a set speed.

[0027] The motor 10 includes a rotor 11, a stator 17 and a rotating shaft 19. The rotor 11 and the rotating shaft 19 are fixed together, and the two are relatively stationary and rotate synchronously. The stator 17 and the rotating shaft 19 are assembled together to rotate relatively. The rotor 11 rotates relative to the stator 17, and synchronously drives the rotating shaft 19 to rotate relative to the stator 17, thereby realizing the power output of the rotating shaft 19.

[0028] See also Figure 7 ,yes Figure 5 The rotor 11 comprises a rotor housing 111 , a through hole 112 , a heat dissipation hole 113 and a magnet module 115 .

[0029] The rotor housing 111 is in the shape of a hollow cylinder as a whole, and includes a top wall 1111 and a side wall 1113 which are connected to each other. The top wall 1111 is in the shape of a circular sheet, and the side wall 1113 is in the shape of a hollow ring. The edge of the side wall 1113 is connected to the outer contour of the top wall 1111, and together they form a hollow cylinder with one end open. The rotor housing 111 is made of an aluminum bracket, and the top wall 1111 and the side wall 1113 are integrally formed. In this embodiment, the rotor housing 111 can be directly processed by a digital control processing technology, and it can also be injection molded using a carbon fiber material, so that the rotor housing 111 is an integral structure.

[0030] The through hole 112 is provided in the central area of ​​the top wall 1111, and the rotating shaft 19 passes through the through hole 112. The top wall 1111 includes a body and the through hole 112, the through hole 112 is located at the center of the body and passes through the body, and the center of the through hole 112, the center of the ring surrounded by the side walls 1113, and the geometric center of the multiple magnets arranged in a Halbach array are on the same axis.

[0031] The heat dissipation holes 113 are evenly arranged in an array on the side wall 1113 , which facilitates the smooth dissipation of heat generated during the operation of the motor 10 .

[0032] The magnet module 115 includes a plurality of permanent magnets 1150. The plurality of permanent magnets 1150 are fixedly arranged on the side surface of the side wall 1113 adjacent to the receiving space in a Halbach array. Specifically, the magnet module 115 can be fixed to the inner surface of the side wall 1113 by colloid bonding; further, the magnet module 115 can also be embedded in the inner surface of the side wall 1113, wherein the inner surface of the side wall 1113 is correspondingly provided with a plurality of receiving grooves, which respectively receive the permanent magnets 1150 one by one.

[0033] The stator 17 includes a base 171, a locking member 172, a bearing assembly 173 and a winding coil 175. The base 171, the bearing assembly 173 and the winding coil 175 are correspondingly accommodated in the accommodation space surrounded by the rotor housing 111. The locking member 172 cooperates with the rotating shaft 19 to lock the bearing assembly 173 and is sleeved on the outer side of the rotating shaft 19. The winding coil 175 is sandwiched between the magnet module 115 and the bearing assembly 173.

[0034] The rotating shaft 19 is inserted into the center of the through hole 112 and the bearing assembly 173, and the rotating shaft 19 is fixed to the rotor housing 111 by a screw locking structure, and the two rotate synchronously with each other. The rotating shaft 19 is also sleeved with the base 171 through the bearing assembly 173, and the rotating shaft 19 is free to rotate relative to the base 17.

[0035] The rotor 11 further includes a fixing member, which passes through the through hole 112 and is fixed together with the top wall 1111 to rotate synchronously.

[0036] The rotating shaft 19 is fixed to the top wall 1111 by the fixing member, and the rotating shaft 19 is assembled with the base 171 by the bearing assembly 173 . The rotating shaft 19 rotates synchronously with respect to the rotor 11 , and the rotating shaft 19 rotates relative to the base 171 through the bearing assembly 173 .

[0037] See also Figure 8 ,yes Figure 5 The side cross-sectional view of the motor shown. When the motor 10 is assembled, the magnet module 115 is assembled on the inner surface of the side wall of the rotor housing 111 to form the rotor 11. The locking member 172 cooperates with the rotating shaft 19 to lock the base 171, the bearing assembly 173 and the winding coil 175 to form a stator. The rotating shaft 19 is fixed to the rotor housing 111 so that the rotating shaft 19 rotates synchronously with the rotor housing 111. The rotating shaft 19 is free to rotate relative to the base 133 through the bearing assembly 173, thereby realizing the relative rotation of the stator 17 relative to the rotor 11.

[0038] Compared with the prior art, in the motor 10, the top wall and side wall of the rotor housing of the rotor 11 are integrated into a structure, and are made of aluminum or carbon fiber material with low density, and are processed by digital control processing or injection molding process to reduce the weight of the rotor housing 111 and improve the endurance. At the same time, the top wall 1111 and the side wall 1113 are integrally formed to reduce the number of components, simplify the assembly process, omit the use of colloid to bond the top wall 1111 and the side wall 1113, and improve product reliability.

[0039] The above is only an implementation method of the present invention. It should be pointed out that a person skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements are all within the protection scope of the present invention.

Claims

1. A permanent magnet synchronous motor rotor, comprising: top wall; Side wall; Multiple magnets, characterized in that the top wall and the side wall are integrally formed and enclose an open receiving space, the multiple magnets are received in the receiving space, and are fixed on the side wall adjacent to the side surface of the receiving space in a Halbach array.

2. The permanent magnet synchronous motor rotor according to claim 1, characterized in that: The side wall is in the shape of a circular column, and the edge of the side wall is connected to the outer contour of the top wall.

3. The permanent magnet synchronous motor rotor according to claim 2, characterized in that: The top wall includes a body and a through hole, wherein the through hole is located at the center of the body and passes through the body, and the center of the through hole, the center of the circle surrounded by the side walls, and the geometric centers of the multiple magnets arranged in a Halbach array are on the same axis.

4. The permanent magnet synchronous motor rotor according to claim 3, characterized in that: The top wall and the side wall are an integrated structure formed by a digital control processing technique or an integrated structure formed by injection molding of carbon fiber material.

5. The permanent magnet synchronous motor rotor according to claim 1, characterized in that: The magnet is fixed to the inner surface of the side wall by colloid.

6. The permanent magnet synchronous motor rotor according to claim 3, characterized in that: A plurality of receiving grooves arranged in an array are disposed on the inner surface of the side wall, the receiving grooves correspond to the magnets one by one, and the magnets are received in the receiving grooves.

7. The permanent magnet synchronous motor rotor according to claim 3, characterized in that: It also includes a fixing piece, which passes through the through hole and is fixed together with the top wall to rotate synchronously.

8. A permanent magnet synchronous motor, comprising Stator, including; Base; A bearing assembly is sleeved on the base; and A winding coil is fixed to the base and is relatively stationary with the base and the bearing assembly; A rotating shaft, one end of which is fixed to the bearing assembly and is pivotally connected relative to the bearing assembly; and A rotor, which is fixed to the rotating shaft and rotates synchronously with the rotor, characterized in that: The rotor includes a top wall, a side wall and a plurality of magnets. The top wall and the side wall are integrally formed and enclose an open receiving space. The plurality of magnets are received in the receiving space and are fixed on the side wall in a Halbach array near the side surface of the receiving space.

9. The permanent magnet synchronous motor according to claim 8, characterized in that: It also includes a fixing member, the rotating shaft and the top wall are fixed together through the fixing member, the rotating shaft and the base are assembled together through the bearing assembly, the rotating shaft rotates synchronously relative to the rotor, and the rotating shaft rotates relative to the base through the bearing assembly.

10. The permanent magnet synchronous motor according to claim 8, characterized in that: The top wall and the side wall are an integrated structure formed by a digital control processing technique or an integrated structure formed by injection molding of carbon fiber material.

Images