CN210927417U

CN210927417U - Novel superspeed single-phase motor

Info

Publication number: CN210927417U
Application number: CN201920849338.2U
Authority: CN
Inventors: 张国华; 张琪
Original assignee: Shenzhen Hengdrive Electric Co ltd
Current assignee: Shenzhen Hengdrive Motor Co ltd
Priority date: 2019-06-06
Filing date: 2019-06-06
Publication date: 2020-07-03
Anticipated expiration: 2029-06-06

Abstract

The utility model discloses a novel hypervelocity single phase motor, include: the motor comprises a motor body, a stator assembly and a rotor assembly; the stator assembly comprises a circular four-slot stator core part and an injection molding integrated insulating support or an up-and-down insulating support; the motor body comprises at least one stator chamber for fixing the stator assembly, and the motor body comprises a bearing chamber concentric with the stator chamber for fixing the rotor assembly; rotor assembly includes axle, magnet, bearing, gasket, spring and fan blade, the utility model relates to a high rotational speed brushless motor technical field. This novel hypervelocity single phase motor, it is little to have motor running noise, and the rotational speed is fast, and structure cooperation precision is high, and motor wind-guiding is efficient, and the technology installation is simple.

Description

Novel superspeed single-phase motor

Technical Field

The invention relates to the technical field of high-rotating-speed brushless motors, in particular to a novel ultra-high-speed single-phase motor.

Background

Brushless dc motors can be divided into two broad categories according to their winding phase number: brushless dc motors and multiphase brushless dc motors are used for small power drives such as power tools, medical instruments, telecommunications, agricultural machinery and appliances for daily life. There are many types of motors that are integrated with a machine tool, such as a power tool, a water pump, a refrigerator motor, etc. With the rapid development of modern scientific technologies such as power electronic technology, control theory and computer technology, and the development of novel rare earth permanent magnet materials, the application field of the multiphase brushless direct current motor is more and more extensive. In addition, with the development of national economy of China and the increasing demand of urban and rural people on household appliances, the output of the motor is continuously increased, and the application range is continuously expanded.

Traditional three-phase brushless motor and brushless DC motor, the speed can not be accomplished very fast, and the noise is great moreover. In addition, the air flow gap between the iron core and the magnet of the conventional motor is uniform, and good pre-positioning of the rotor cannot be realized. The existing Dyson high-speed fan adopts a two-section C-shaped stator core part, the installation is very complicated, the two asymmetric pole shoes cannot realize good salient polarity after installation, and the motor cannot rotate according to the specified rotation direction when being started.

The existing three-phase brushless motor and brushless DC motor can not achieve very fast speed on equal volume and have great noise. Currently, after years of research, Dyson corporation adopts a motor made of 2U-shaped stator cores, the speed can reach 11 thousands of revolutions, and the noise is lower than that of a three-phase motor or a three-phase brushless direct current motor.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a novel ultra-high-speed single-phase motor, which solves the problems and designs a small-sized single-phase high-speed motor, the rotating speed can reach 11 thousands of revolutions, and the noise is lower than that of a three-phase high-speed motor.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: a novel ultra high speed single phase motor comprising: the motor comprises a motor body, a stator assembly and a rotor assembly; the stator assembly comprises a circular four-slot stator core part and an injection molding integrated insulating support or an upper and lower insulating support; the motor body comprises at least one stator chamber for fixing the stator assembly, and the motor body comprises a bearing chamber concentric with the stator chamber for fixing the rotor assembly; the rotor assembly comprises a shaft, a magnet, a bearing, a gasket, a spring and a fan blade; at least one annular groove is arranged at the joint of the shaft and the magnet.

The stator assembly adopts a circular four-slot iron core, pole shoes on four teeth are cut, and the left side and the right side of each pole shoe are of an asymmetric structure. The asymmetric pole shoe can increase the salient polarity of the motor, and meanwhile, the concentricity of the stator assembly and the rotor assembly is high, so that the rotor of the motor is positioned at a preset position when being started every time, and the starting stability of the motor is increased.

The stator assembly is arranged in a stator chamber in the motor body, so that an air outlet of the motor is not blocked. The smoothness of the motor air duct is improved, so that when the motor runs, vibration and noise are reduced to the maximum extent, and the service life is prolonged.

The motor body comprises the stator chamber and the bearing chamber which are respectively used for fixing the stator assembly and the rotor assembly, and the stator chamber and the bearing chamber are integrally processed in a CNC high-precision mode, so that the concentricity of the stator assembly and the rotor assembly can be well guaranteed, the efficiency of the motor is improved, and the difficulty of an assembly process is greatly reduced.

The motor body comprises at least 4 reinforcing ribs for supporting the stator chamber and the bearing chamber and increasing the structural strength of the stator chamber and the bearing chamber.

In the rotor assembly, a shaft, a magnet, a bearing, a gasket, a spring and a fan blade are assembled in sequence, wherein at least one annular groove is formed in the joint of the shaft and the magnet, more adhesive can be stored in the annular groove, the shaft and the magnet are tightly connected, and the strength and the connection fastening degree of the magnet are improved in a phase-changing manner. Therefore, the magnet can be prevented from being broken and falling off due to centrifugal force under the condition of ultrahigh rotating speed.

(III) advantageous effects

The invention provides a novel ultra-high-speed single-phase motor. The method has the following beneficial effects:

this novel hypervelocity single phase motor is fixed in this internal stator chamber of motor through the stator assembly, simultaneously because the stator assembly is fixed in the motor completely originally internally, can not have any to block the motor air-out, so can play the efficiency that promotes the motor, reduces the effect of motor noise.

Drawings

Fig. 1 is an exploded perspective view of a motor;

FIG. 2 is a cross-sectional view of a motor body of the motor;

FIG. 3 is an exploded perspective view of a stator assembly portion of the electric machine;

FIG. 4 is a cross-sectional view of a portion of a prior art rotor assembly;

FIG. 5 is a stator chip portion of the motor;

FIG. 6 is a cross-sectional view of a partially assembled motor;

fig. 7 is an assembled sectional view of the motor.

In the figure: 1 stator core, 2 insulating supports, 3 welding wire columns, 4 motor bodies, 5 wiring boards, 6 shovel-shaped terminals, 7 magnets, 8 gaskets, 9 shafts, 10 bearings, 11 springs, 12 fan blades, 13 stator assemblies, 14 rotor assemblies, 15 stator chambers, 16 bearing chambers, 17 reinforcing ribs, 18 machine cases, 19 annular grooves, 20 teeth and 21 pole shoes.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a novel ultra-high-speed single-phase motor comprises a stator assembly 13, a motor body 4 and a rotor assembly 14, wherein a shovel-type terminal 6, a wiring board 5, a welding wire column 3, an insulating support 2 and a stator core 1 form the stator assembly 13, which is shown in figure 3, the stator core 1 in the stator assembly 13 can be combined with the insulating support 2 into a whole in an injection molding mode, then the whole is assembled with a winding, so that the winding with high voltage and the stator core 1 are isolated to the maximum extent and are in direct contact, wherein the head and tail ends of the winding are wound and welded with the welding wire column 3 and are connected with the welding wire column 3 through the wiring board 5, finally the shovel-type terminal 6 is welded on the wiring board 5, and then a driver can be directly connected to the shovel-type terminal 6 to drive the motor. This has the advantage that the voltage output by the drive plate can be simply and reliably input to the motor windings via the terminals.

The stator core 1 is a circular uniform four-slot structure, and pole shoes 21 on four teeth 20 are in a left-right asymmetric structure. When the motor rotates, the magnet 7 in the rotor assembly 14 passes through the left and right positions of the pole shoe 21, the magnetic flux on the teeth 20 is different, and the magnetic flux is fed back to the winding wound on the teeth 20, so that the position of the motor rotor assembly 14 relative to the stator assembly 13 is known. Therefore, according to the characteristics, a program is compiled in a driver to control the on-off of the stator winding, so that an induced magnetic field is formed on the winding, and the induced magnetic field interacts with the excitation permanent magnet 7 to generate a rotational moment, so that the rotor assembly 14 can run continuously.

The stator assembly 13 is fixed in the stator chamber 15 of the motor body 4 by the stator core 1 using one or more of an adhesive or an interference fit. Bearing housing 16, which is machined in one turn with stator housing 15, is used to secure rotor assembly 14, again using one or more of an adhesive or an interference fit. The innovation of the assembly mode is that the stator chamber 15 and the bearing chamber 16 are machined by one-time turning, which greatly improves the concentricity of the rotor and the stator of the motor. So as to ensure that the pole shoes 21 on the stator core 1 can be uniformly distributed around the magnet 7, and the salient polarity of the motor is increased. The rotor assembly 14 is in a pre-positioned position each time the motor is started, so that the motor can run in a fixed rotational direction when started.

In the embodiment, the stator chamber 15 and the bearing chamber 16 are supported by the reinforcing ribs 17 and fixed on the casing 18, and are integrated into the motor body 4. Meanwhile, not only the structure is limited, in the present embodiment, the stator chamber 15, the bearing chamber 16 and the reinforcing ribs 17 may be constructed as a whole, and then fixedly connected with the casing 18 by interference fit to form the motor body 4.

The motor body 4 is made of zinc alloy, so that the requirement of motor strength is met, and the noise of the motor is weakened by utilizing the characteristic that the zinc alloy transmits sound passivity.

The rotor assembly 14 is formed by fixing the magnet 7, the two bearings 10, the two gaskets 8, the spring 11 and the fan blade 12 on the rotating shaft 9 in sequence by using an adhesive or in an interference fit mode.

The rotor assembly 14 is assembled as shown in fig. 4, with the two bearings secured in the bearing chamber 16 of the motor body 4 by one or more of an adhesive or an interference fit. The concentricity of the bearing chamber 16 and the stator chamber 15 is utilized to skillfully assemble the rotor assembly 14 and the stator assembly 13 together with good concentricity.

In the rotor assembly 14, the joint of the shaft 9 and the magnet 7 is provided with at least one annular groove 19, more adhesive can be stored in the annular groove 19, the shaft 9 and the magnet 7 are tightly connected, and the strength and the connection fastening degree of the magnet 7 are improved in a phase change manner. Therefore, the magnet 7 can be prevented from being broken or falling off due to centrifugal force under the condition of ultrahigh rotating speed.

The function of the washer 8 and the spring 11 is to apply the elastic force of the spring 11 to the outer rings of the two bearings 10, so as to apply a pre-tightening force to the two bearings 10. As is known, the ball bearing is applied with proper pretightening force in use, so that the service life of the bearing can be prolonged, and the rotation noise of the bearing can be reduced.

The excitation permanent magnet 7 is made of bonded neodymium iron boron material, but is not limited to this material. The number of magnetic poles of the excitation permanent magnet 7 is 4.

The fan blades 12 are made of aluminum alloy, and have the advantages of higher strength and lighter weight compared with aluminum. The fan blades 12 at least comprise 9 or more odd-numbered blades, such as 9, 11, 13, 15 and the like. The reason for this is that the higher order odd number blades have better balance when operating, and when operating at 11 kilo-revolutions, the sound frequency generated is greater than 20KHZ, so that the sound is not heard by human ears, and the effect of reducing noise is achieved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation. The use of the phrase "comprising one of the elements does not exclude the presence of other like elements in the process, method, article, or apparatus that comprises the element.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a novel hypervelocity single phase motor, includes motor body (4), stator assembly (13), rotor assembly (14), its characterized in that: the stator assembly (13) comprises a circular four-slot stator core part and an injection molding integrated insulating bracket or an upper and lower insulating bracket;

the motor body (4) comprises at least one stator chamber for fixing the stator assembly, and the motor body (4) comprises a bearing chamber concentric with the stator chamber for fixing the rotor assembly (14);

the rotor assembly (14) comprises a shaft (9), a magnet (7), a bearing (10), a gasket (8), a spring (11) and a fan blade (12);

and annular grooves (19) are formed at the joint of the shaft (9) and the magnet (7), and the number of the annular grooves (19) is more than one.

2. A new ultra high speed single phase motor according to claim 1, wherein: a stator core part in the stator assembly (13) is of a circular four-slot structure, pole shoes on four teeth are cut, and the left side and the right side of each pole shoe are of an asymmetric structure.

3. A new ultra high speed single phase motor according to claim 1, wherein: the integrated insulating support or the upper and lower insulating supports are injected in the stator assembly (13), a metal contact pin is injected at the top of the integrated insulating support or the upper and lower insulating supports, and when the stator is wound, the wire head and the wire tail are fixed on the metal contact pin.

4. A new ultra high speed single phase motor according to claim 1, wherein: the whole stator assembly (13) is assembled in a stator chamber of the motor body (4) in an embedded mode and arranged at an air outlet of the motor, and air flow cannot be obstructed.

5. A new ultra high speed single phase motor according to claim 1, wherein: the upper end and the lower end of an inner supporting body of the motor body (4) are respectively provided with a concentric stator chamber (15) and a concentric bearing chamber (16) which are respectively used for fixing a stator assembly (13) and a rotor assembly (14).

6. A new ultra high speed single phase motor according to claim 4, wherein: the stator chamber (15) and the bearing chamber (16) of the inner support body of the motor body (4) are connected to the outer support body through reinforcing ribs (17), and the number of the reinforcing ribs (17) is more than three.

7. A new ultra high speed single phase motor according to claim 1, wherein: the fan blades (12) in the rotor assembly (14) are integrally made of aluminum alloy.

8. A new ultra high speed single phase motor according to claim 1, wherein: the rotor assembly (14) is formed by assembling a shaft (9), a magnet (7), a bearing (10), a gasket (8), a spring (11) and a fan blade (12) in sequence.