CN215267833U

CN215267833U - Permanent magnet embedded type motor outer rotor structure

Info

Publication number: CN215267833U
Application number: CN202120429521.4U
Authority: CN
Inventors: 童卫星
Original assignee: Shenzhen Tongyida Magnetic Industry Co ltd
Current assignee: Shenzhen Tongyida Magnetic Industry Co ltd
Priority date: 2021-02-27
Filing date: 2021-02-27
Publication date: 2021-12-21
Anticipated expiration: 2031-02-27

Abstract

The utility model discloses a permanent magnetism buryyed motor external rotor structure, including mount and magnet mechanism, magnet mechanism fixed mounting is in the mount, magnet mechanism is evenly encircleed by several magnet subassembly and is formed, the several the center of the equal directional magnet mechanism of magnetic pole of magnet subassembly, and the magnetic pole at the directional magnet mechanism center of adjacent magnet subassembly is opposite, the magnet subassembly comprises gathering magnetism shell and magnet, it is one side open-ended casing to gather the magnetism shell, and gathers magnetism shell fixed mounting at the inner ring of mount, magnet fixed mounting is in gathering the magnetism shell, and one of them magnetic pole of magnet exposes outside gathering the magnetism shell. The utility model discloses make motor stator have higher air gap magnetic density and torque density in less volume, can also produce reluctance torque, further improved motor torque density to can effectively reduce the motor volume, have the advantage that improves the motor performance.

Description

Permanent magnet embedded type motor outer rotor structure

Technical Field

The utility model relates to the technical field of electric machines, specifically be a permanent magnetism imbeds formula motor external rotor structure.

Background

An electric machine typically includes a stator fixed to a housing and a rotor movable relative to the stator. For example, the rotor may be supported such that it is rotatable relative to the stator or such that it is linearly movable relative to the stator, and the electrical machine is classified as an electromechanical energy converter and may be used as an electrical motor or a generator.

With the development of modern industrial technology, a large number of working occasions require the motor to operate at a low speed and provide a high torque. In order to realize the low-speed operation of the motor, a power supply with lower working frequency is adopted to supply power to the asynchronous motor or increase the pole pair number of the asynchronous motor, the low-frequency power supply needs expensive power electronic equipment such as an inverter and the like, the influence is not favorable for the stable operation of the motor, the leakage inductance is overlarge due to the increase of the pole pair number of the motor at one step, the power factor of the motor is reduced, although the permanent magnet motor does not need to adopt an electric excitation mode, the leakage flux is too much due to the excessive number of the pole pair numbers of the permanent magnet, and the motor output is lost; according to the motor design theory, the torque of the motor is approximately proportional to the motor volume, which means that the large-torque motor has larger volume, larger occupied space, more materials used by the motor and higher cost. Therefore, the traditional industry mostly adopts a mechanical transmission mechanism such as a gear box and the like to match the rotating speed and the torque of the motor and the load. But the inherent defects of the motor system such as vibration, noise, metal fatigue and the like greatly reduce the stability of the motor working system and improve the maintenance cost and the maintenance difficulty of the motor system. Therefore, it is necessary to improve the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a formula motor external rotor structure is buryyed to permanent magnetism, possesses the advantage that improves the motor performance, has solved the problem that proposes in the above background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a permanent magnetism formula motor outer rotor structure of buryying, includes mount and magnet mechanism, magnet mechanism fixed mounting is in the mount, magnet mechanism is evenly surrounded by several magnet subassembly and forms, several the magnetic pole of magnet subassembly all points to the center of magnet mechanism, and adjacent magnet subassembly point to the opposite magnetic pole in magnet mechanism center.

Preferably, the magnet assembly is composed of a magnetism gathering shell and a magnet, the magnetism gathering shell is a shell with an opening on one surface, the magnetism gathering shell is fixedly installed on an inner ring of the fixing frame, the magnet is fixedly installed in the magnetism gathering shell, and one magnetic pole of the magnet is exposed out of the magnetism gathering shell.

Preferably, the number of magnet assemblies is at least four, and the number of magnet assemblies is even.

Preferably, the magnet is one of a neodymium iron boron magnet, a samarium cobalt magnet and an alnico magnet.

Preferably, the magnetism gathering shell is made of metal that can be attracted by a magnet.

Compared with the prior art, the beneficial effects of the utility model are as follows:

the utility model discloses a set up the magnet subassembly, the magnet subassembly comprises gathering magnetism shell and magnet, it is one side open-ended casing to gather the magnetism shell, and gathers the inner ring of magnetism shell fixed mounting at the mount, magnet fixed mounting is in gathering the magnetism shell, and one of them magnetic pole of magnet exposes outside gathering the magnetism shell, several the center of the equal directional magnet mechanism of magnetic pole of magnet subassembly, and the magnetic pole at the directional magnet mechanism center of adjacent magnet subassembly is opposite, makes it have higher air gap magnetism density and torque density in less volume, can also produce reluctance torque, has further improved motor torque density to can effectively reduce the motor volume, have the advantage that improves the motor performance.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural diagram of a magnet assembly according to the present invention;

fig. 3 is a schematic cross-sectional structural view of the magnet assembly of the present invention.

The reference numerals and names in the figures are as follows:

1. a fixed mount; 2. a magnetism gathering shell; 3. a magnet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 to fig. 3, the present invention provides an embodiment: the utility model provides a permanent magnetism formula motor outer rotor structure of buryying, includes mount 1 and magnet mechanism, magnet mechanism fixed mounting is in mount 1, magnet mechanism is evenly surrounded by several magnet subassembly and forms, several the magnetic pole of magnet subassembly all points to the center of magnet mechanism, and adjacent magnet subassembly point to the opposite magnetic pole in magnet mechanism center.

More specifically, the magnet assembly is composed of a magnetism gathering shell 2 and a magnet 3, the magnetism gathering shell 2 is a shell with an opening on one surface, the magnetism gathering shell 2 is fixedly installed on an inner ring of the fixing frame 1, the magnet 3 is fixedly installed in the magnetism gathering shell 2, and one magnetic pole of the magnet 3 is exposed out of the magnetism gathering shell 2.

More specifically, the number of magnet assemblies is at least four, and the number of magnet assemblies is an even number.

More specifically, magnet 3 is one of neodymium iron boron magnet, samarium cobalt magnet and alnico magnet.

More specifically, the magnetism collecting case 2 is made of metal that can be attracted by the magnet 3.

The working principle is as follows: the utility model discloses firstly pack into magnet 3 and gather in magnetism shell 2, gather magnetism shell 2 and be made by the metal that can be adsorbed by magnet 2, its shape is one end open-ended casing, 3 fixed mounting of magnet have the one end magnetic pole to expose outside after gathering magnetism shell 2, form the magnet subassembly, adjacent magnet subassembly exposes outside magnetic pole opposite, the center of the common directional magnet mechanism of magnetic pole of several magnet subassembly, at this in-process, the magnetic line of force produces the extrusion and upwards extends at the magnetic pole because of receiving the restraint that switches on of gathering magnetism shell 2, thereby make 3 magnetic force reinforcing of magnet.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a formula motor outer rotor structure is buryyed to permanent magnetism, includes mount and magnet mechanism, magnet mechanism fixed mounting is in the mount, its characterized in that: the magnet mechanism is formed by uniformly surrounding a plurality of magnet assemblies, the magnetic poles of the magnet assemblies point to the center of the magnet mechanism, and the magnetic poles of the adjacent magnet assemblies point to the center of the magnet mechanism are opposite.

2. The outer rotor structure of embedded permanent magnet motor according to claim 1, wherein: the magnet assembly is composed of a magnetism gathering shell and a magnet, the magnetism gathering shell is a shell with an opening in one face, the magnetism gathering shell is fixedly installed on an inner ring of the fixing frame, the magnet is fixedly installed in the magnetism gathering shell, and one magnetic pole of the magnet is exposed outside the magnetism gathering shell.

3. The outer rotor structure of the embedded permanent magnet motor according to any one of claims 1-2, wherein: the number of the magnet assemblies is at least four, and the number of the magnet assemblies is even.

4. The outer rotor structure of embedded permanent magnet motor according to claim 2, wherein: the magnet is one of neodymium iron boron magnet, samarium cobalt magnet and alnico magnet.

5. The outer rotor structure of embedded permanent magnet motor according to claim 2, wherein: the magnetism gathering shell is made of metal which can be adsorbed by a magnet.