阅读说明：本技术 内转子马蹄铁型绕组永磁电机 (Permanent magnet motor with horseshoe-shaped winding of inner rotor ) 是由 吴凡 张华� 汪源 曹宏 石先平 张少文 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种内转子马蹄铁型绕组永磁电机,包括转子单元装入定子单元内,电机轴连接转子单元；定子单元由多个马蹄铁型定子围成的环形定子,马蹄铁型定子由硅钢片叠成,在马蹄铁型定子的两条腿上缠绕定子绕组形成马蹄铁型定子铁芯,机壳套装在定子单元的外周,转子单元包括转子轭部和多个粘贴在转子轭部表面上的磁铁,电机轴连接转子轭部。优点,本永磁电机通过对定子上绕组的安装结构进行设计,提出了一种复合磁路结构,从而提高永磁电机转矩密度和功率密度实现轻量化,并将定子总成采用真空灌封方案,提高散热效果,具有较高的转矩密度优。(The invention discloses an inner rotor horseshoe-shaped winding permanent magnet motor, which comprises a rotor unit, a stator unit, a motor shaft and a stator unit, wherein the rotor unit is arranged in the stator unit; the annular stator that stator unit is enclosed by a plurality of horseshoe type stators, horseshoe type stator is folded by the silicon steel sheet, twines stator winding on two legs of horseshoe type stator and forms horseshoe type stator core, and the casing suit is in stator unit's periphery, and rotor unit includes rotor yoke portion and a plurality of magnet of pasting on rotor yoke portion surface, and rotor yoke portion is connected to the motor shaft. The advantage, this permanent-magnet machine has proposed a compound magnetic circuit structure through designing the mounting structure of winding on the stator to improve permanent-magnet machine torque density and power density and realize the lightweight, and adopt the vacuum embedment scheme with the stator assembly, improve the radiating effect, have higher torque density excellence.)

1. The utility model provides an inner rotor horseshoe type winding permanent-magnet machine, includes stator element and rotor element, its characterized in that: the rotor unit is arranged in the stator unit, and a motor shaft (3) is connected with the rotor unit;

the stator unit is an annular stator formed by encircling a plurality of horseshoe-shaped stators (1), openings of all the horseshoe-shaped stators (1) face inwards, the horseshoe-shaped stators (1) are formed by overlapping silicon steel sheets, stator windings (2) are wound on two legs of the horseshoe-shaped stators (1) to form a horseshoe-shaped stator core, and a magnetic field at one end of a U-shaped winding defining the horseshoe-shaped stator core is an N pole, and a magnetic field at the other end of the U-shaped winding defines an S pole; an iron core frame (3) is fixed at the end part of each leg of the horseshoe-shaped stator iron core, and a gap is reserved between the two iron core frames (3) on each horseshoe-shaped stator iron core; gaps are reserved between every two adjacent iron core frames (3) on every two adjacent horseshoe-shaped stator iron cores forming the annular stator, and the N poles and the S poles of every two adjacent horseshoe-shaped stator iron cores forming the annular stator are alternately arranged;

the shell (4) is sleeved on the periphery of the stator unit, the stator unit and the shell (4) are subjected to vacuum casting by epoxy resin and are cured and molded, so that the stator core, the winding and the shell form an integral stator assembly;

the rotor unit comprises a rotor yoke part (5) and a plurality of magnets (6) adhered to the surface of the rotor yoke part (5), the magnets (6) are arranged in two rings corresponding to the ring-shaped stator, and the magnets (6) positioned on the same circumference are alternately arranged in an N pole and an S pole; gaps are reserved between adjacent magnets (6) on the same circumference, and the number of the magnets (6) and the number of the U-shaped windings are set according to the slot pole matching number of any conventional permanent magnet motor;

the motor shaft (3) is connected with the rotor yoke part (5).

2. An inner rotor horseshoe type winding permanent magnet machine according to claim 1, characterized in that: the iron core frame (3) is a square plate, and holes for inserting legs of the horseshoe-shaped stator iron core are formed in the square plate.

3. An inner rotor horseshoe type winding permanent magnet machine according to claim 2, characterized in that: the iron core frame (3) is made of a magnetic conductive material, and is a No. 45 steel plate, a Q235 steel plate or a Q195 steel plate.

4. An inner rotor horseshoe type winding permanent magnet machine according to claim 1, characterized in that: the magnet (6) is adhered to the surface of the rotor yoke part (5) by adopting magnetic steel glue.

Technical Field

The invention relates to an inner rotor horseshoe iron type winding permanent magnet motor, and belongs to the technical field of permanent magnet motors.

Background

Compared with the traditional electrically excited motor, the permanent magnet motor has the advantages of simple and compact structure, high operation reliability, small size, light weight, low loss, high efficiency, high control precision and the like. The shape and size of the permanent magnet motor are different from those of a conventional induction motor, and the permanent magnet motor has the remarkable advantages of flexibility, diversity and the like. And thus has received wide attention from various industries, both industrial and civilian.

Disclosure of Invention

The invention provides an inner rotor horseshoe iron type winding permanent magnet motor, which adopts a horseshoe iron type stator core and has the following specific technical scheme:

an inner rotor horseshoe-shaped winding permanent magnet motor comprises a stator unit and a rotor unit, wherein the rotor unit is arranged in the stator unit, and a motor shaft is connected with the rotor unit;

the stator unit is an annular stator formed by encircling a plurality of horseshoe-shaped stators, the openings of all the horseshoe-shaped stators face inwards, the horseshoe-shaped stators are formed by laminating silicon steel sheets, stator windings are wound on two legs of each horseshoe-shaped stator to form a horseshoe-shaped stator core, and a magnetic field at one end of a U-shaped winding defining the horseshoe-shaped stator core is an N pole while a magnetic field at the other end of the U-shaped winding defines an S pole; an iron core frame is fixed at the end part of each leg of the horseshoe-shaped stator iron core, and a gap is reserved between the two iron core frames on each horseshoe-shaped stator iron core; gaps are reserved between every two adjacent iron core frames on every two adjacent horseshoe-shaped stator iron cores forming the annular stator, and the N poles and the S poles of every two adjacent horseshoe-shaped stator iron cores forming the annular stator are alternately arranged;

the shell is sleeved on the periphery of the stator unit, the stator unit and the shell are subjected to vacuum casting by epoxy resin and are cured and molded, so that the stator core, the winding and the shell form an integral stator assembly;

the rotor unit comprises a rotor yoke part and a plurality of magnets adhered to the surface of the rotor yoke part, the magnets are arranged in two rings corresponding to the ring-shaped stator, and the magnets positioned on the same circumference are alternately arranged in an N pole and an S pole; gaps are reserved between adjacent magnets on the same circumference, and the number of the magnets and the number of the U-shaped windings are set according to the slot pole matching number of any conventional permanent magnet motor;

the motor shaft is connected with the rotor yoke part.

The principle of the permanent magnet motor with the horseshoe-shaped winding of the inner rotor is that the horseshoe-shaped stator winding utilizes the principle that the magnetic field at one end of the U-shaped winding is N, the magnetic field at the other end is the S pole, and the principle is fully utilized, and two ends of the N-S pole are placed in the air gap magnetic field at the same time. Therefore, the motor forms an axial magnetic flux shunt and a radial magnetic flux shunt, the action of a magnetic field is greatly utilized, a conventional motor stator yoke is omitted, and the torque density and the power density of the permanent magnet motor are increased. The adjacent two windings of the stator are electrified at a certain time to form N-S/N-S stator magnetic poles, and the two pairs of N-S/N-S magnetic poles correspond to the adjacent magnetic steel N-S/N-S on the rotor.

Preferably, the iron core frame is a square plate, and holes for inserting the legs of the horseshoe-shaped stator iron core are formed in the square plate. The iron core frame is made of a magnetic conductive material and is a No. 45 steel plate, a Q235 steel plate or a Q195 steel plate. Because each horseshoe stator core is an independent unit, the horseshoe stator cores are fixed on the core frames, the core frames are made of magnetic conductive materials and have a magnetism gathering effect, and a magnetic circuit cannot be short-circuited between N-S of each core frame and needs to be separated, a gap is reserved between every two adjacent core frames.

Preferably, the magnet is adhered to the surface of the yoke part of the rotor by magnetic steel glue. The magnetic steel glue is a purchased part.

Compared with the prior art, the invention has the beneficial effects that:

this permanent-magnet machine has proposed a compound magnetic circuit structure through designing the mounting structure of winding on the stator to improve permanent-magnet machine torque density and power density and realize the lightweight, and adopt the vacuum embedment scheme with the stator assembly, improve the radiating effect, it is excellent to have higher torque density.

1. And a concentrated winding mode is adopted, so that copper materials are saved, and copper consumption is greatly reduced.

2. The horseshoe iron core is adopted, and the iron core is formed by laminating or bonding silicon steel sheets, so that the consumption of the silicon steel sheet material is saved.

3. The horseshoe iron core is adopted, one end of the horseshoe iron core is N-pole, the other end of the horseshoe iron core is S-pole, and coils are wound at two ends of the horseshoe iron core, so that the horseshoe iron core has double magnetism gathering effect and high utilization rate.

4. The horseshoe iron core is adopted, so that the stator loss is low, the magnetic circuit is greatly shortened, and the loss is reduced.

5. The horseshoe iron core utilizes both axial magnetic circuit and radial magnetic circuit, and belongs to a mixed magnetic circuit permanent magnet motor.

6. The horseshoe iron core can be made into multiple poles, is suitable for low-speed and large-torque occasions, and greatly reduces the weight of the whole machine.

Drawings

Fig. 1 is a schematic view of the structure of a horseshoe-type stator core.

Fig. 2 is a schematic diagram of an analog motor forming an axial flux shunt.

Fig. 3 is a schematic diagram of a simulated motor forming a radial flux shunt.

Fig. 4 is a schematic diagram of two adjacent horseshoe stator core windings energized to form N-S/N-S stator poles.

FIG. 5 is a schematic view of the two pairs of N-S/N-S poles of FIG. 4 corresponding to adjacent magnetic steels N-S/N-S on the rotor.

Fig. 6 is a schematic view of the core frame forming a ring shape.

Fig. 7 is an assembly view of the stator unit, the rotor unit and the motor shaft.

Fig. 8 is a schematic view of the upper housing of fig. 7.

Detailed Description

In order to make the disclosure of the present invention more comprehensible, the following description is further made in conjunction with fig. 1 to 8 and the detailed description.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

According to the principle that the magnetic field at one end of the U-shaped winding is N and the magnetic field at the other end is the S pole, the horseshoe-shaped stator winding of the permanent magnet motor with the horseshoe-shaped winding of the inner rotor is arranged in the air gap magnetic field by fully utilizing the principle, and two ends of the N-S pole are simultaneously arranged in the air gap magnetic field, as shown in the figures 1, 2 and 3. Therefore, the motor forms an axial magnetic flux shunt and a radial magnetic flux shunt, the action of a magnetic field is greatly utilized, a conventional motor stator yoke is omitted, and the torque density and the power density of the permanent magnet motor are increased.

Referring to fig. 4 and 5, two adjacent windings of the stator are energized at a certain time to form N-S/N-S stator magnetic poles, and the two pairs of N-S/N-S magnetic poles are corresponding to the adjacent magnetic steels N-S/N-S on the rotor.

The N horseshoe stator cores are fixed on the core frame, each horseshoe stator core is an independent unit and is fixed on the core frame, the frame is made of magnetic conductive materials and has a magnetism gathering effect, a magnetic circuit cannot be short-circuited between N-S of each frame, and the frames need to be separated, as shown in fig. 2, 3 and 6.

It should be noted that if 18 horseshoe-shaped stator cores are adopted, the rotor is formed by splicing 16-pole magnetic steel to form an 18U/16P-type permanent magnet motor model; the invention is not limited to 18U/16P; the slot pole matching number of the conventional three-phase permanent magnet motor can be any, such as: 9U/8P; 12U/10P; 36U/24P; 36U/32P, etc., not repeated; meanwhile, the invention is not limited to three phases and is also suitable for permanent magnet motors with five phases, six phases and nine phases. For convenience of explanation only, the specific invention will be described with an 18U/16P type structure.