阅读说明：本技术 一种双边短初级同步磁阻直线电机 (Bilateral short primary synchronous reluctance linear motor ) 是由 任林杰 廖志明 赵元哲 孙彦 林国斌 王欢 于 2021-01-29 设计创作，主要内容包括：本发明涉及一种双边短初级同步磁阻直线电机,包括两个对称设置的长次级定子(2)以及安装在长次级定子(2)之间并可做往复运动的短初级动子(1),所述的短初级动子(1)与两侧的长次级定子(2)之间均设有间隙(3),所述的短初级动子(1)包括初级铁芯(11)和电枢绕组(12),所述的初级铁芯(11)上靠近长次级定子表面(21)的两侧均设有齿槽结构,所述的电枢绕组(12)设置在所述的齿槽结构中。与现有技术相比,本发明兼具高效、低成本、高推力密度、低转矩脉动、宽调速范围特性等优点。(The invention relates to a bilateral short primary synchronous reluctance linear motor which comprises two symmetrically arranged long secondary stators (2) and a short primary rotor (1) which is arranged between the long secondary stators (2) and can reciprocate, wherein gaps (3) are respectively arranged between the short primary rotor (1) and the long secondary stators (2) at two sides, the short primary rotor (1) comprises a primary iron core (11) and an armature winding (12), both sides of the primary iron core (11) close to the surface (21) of the long secondary stators are respectively provided with a tooth space structure, and the armature winding (12) is arranged in the tooth space structure. Compared with the prior art, the invention has the advantages of high efficiency, low cost, high thrust density, low torque pulsation, wide speed regulation range and the like.)

1. The utility model provides a bilateral short primary synchronous reluctance linear motor, its characterized in that includes long secondary stator (2) that two symmetries set up and install between long secondary stator (2) and can be reciprocating motion short primary runner (1), short primary runner (1) and long secondary stator (2) of both sides between all be equipped with clearance (3), short primary runner (1) including primary core (11) and armature winding (12), primary core (11) on be close to long secondary stator surface (21) both sides all be equipped with the tooth's socket structure, armature winding (12) set up the tooth's socket structure in.

2. A double-sided short primary synchronous reluctance linear motor according to claim 1, wherein the slot structure on both sides of the short primary mover (1) is in a symmetrical form.

3. A double-sided short primary synchronous reluctance linear motor according to claim 2, characterized in that the armature windings (12) on both sides of the short primary mover (1) are also symmetrically distributed in the slot structure.

4. A double-sided short primary synchronous reluctance linear motor according to any one of claims 1 to 3, wherein the tooth space structure comprises primary slots (13) and primary teeth which are sequentially arranged in a staggered manner, and the armature windings (12) are arranged in the primary slots (13).

5. A double-sided short primary synchronous reluctance linear motor according to claim 4, characterized in that the armature winding (12) of the primary slot (13) is a double-layer distributed winding.

6. A double-sided short primary synchronous reluctance linear motor according to claim 1, characterized in that said long secondary stator (2) comprises several pole modules (22) mounted in sequence along the direction of motion of the short primary mover (1).

7. The double-sided short primary synchronous reluctance linear motor according to claim 6, wherein said magnetic pole module (22) comprises a magnetic pole module (22) with iron ribs, said magnetic pole module (22) with or without iron ribs comprises a magnetic barrier (221), a magnetic bridge (222) and longitudinal iron ribs (223), said magnetic barrier (221) and said magnetic bridge (222) are arranged in plurality and staggered, said longitudinal iron ribs (223) are parallel to the moving direction of the short primary mover (1) for connecting the ends of the plurality of magnetic bridges (222) into a whole.

8. A double-sided short primary synchronous reluctance linear motor as claimed in claim 6, wherein said pole module (22) comprises a non-iron rib pole module (22), said non-iron rib pole module (22) comprises a magnetic barrier (221), a magnetic bridge (222) and a non-magnetic conductive filling material, said magnetic barrier (221) and said magnetic bridge (222) are arranged in a plurality and staggered, said non-magnetic conductive filling material is filled in said magnetic barrier (221) to connect said plurality of magnetic bridges (222) into a whole.

9. A double-sided short primary synchronous reluctance linear motor according to claim 7 or 8, wherein the outer contour of said magnetic barrier (221) is a polygonal line formed by straight line segments.

10. A double-sided short primary synchronous reluctance linear motor according to claim 7 or 8, characterized in that the outer contour of said magnetic barriers (221) is streamlined by spline curves.

Technical Field

The invention relates to the technical field of design and manufacture of motor bodies, in particular to a bilateral short primary synchronous reluctance linear motor.

Background

The linear motor is a typical electromechanical energy conversion device which directly converts electric energy into linear motion mechanical energy, and has the advantages of intermediate framework saving, no abrasion, low noise, high reaction speed, high energy transfer efficiency and the like. The thrust generator is widely applied to various scenes needing to directly generate thrust, such as transportation, military, aerospace, industrial automation and the like.

The existing linear motor technology mainly comprises: linear induction motor, permanent magnet linear motor, switched reluctance linear motor. The linear induction motor is widely adopted in the field of urban rail transit, but is limited in speed regulation range due to the end effect, low efficiency and low power factor; the permanent magnet linear motor has the advantages of high thrust, high power density, high efficiency and the like, but in a long-distance driving system, the use of a large amount of permanent magnet materials brings challenges to the maintenance and installation environment while improving the manufacturing cost; the switched reluctance linear motor has the advantages of simple structure, high reliability, low cost and the like, and has the main problem of large thrust fluctuation.

The synchronous reluctance motor has the advantages of high efficiency, low cost, high torque density and the like, and the rotor of the synchronous reluctance motor is of an excitation-free iron core structure, so that the synchronous reluctance motor is high in structural robustness and insensitive to working temperature. Compared with a switched reluctance motor, the synchronous reluctance motor has smaller torque pulsation and lower vibration and noise. However, in the application of a linear motor which requires a high thrust, a high thrust density and is sensitive to cost, a linear device which can achieve the characteristics of high efficiency, low cost, high thrust density, low torque ripple and wide speed regulation range is demanded.

Disclosure of Invention

The present invention aims to overcome the defects of the prior art and provide a double-sided short primary synchronous reluctance linear motor.

The purpose of the invention can be realized by the following technical scheme:

the utility model provides a bilateral short primary synchronous reluctance linear motor, includes the long secondary stator that two symmetries set up and install between the long secondary stator and can be reciprocating motion's short primary active cell, the long secondary stator of short primary active cell and both sides between all be equipped with the clearance, short primary active cell include primary core and armature winding, primary core on be close to the both sides on long secondary stator surface and all be equipped with tooth's socket structure, armature winding set up the tooth's socket structure in.

Preferably, the tooth groove structures on two sides of the short primary rotor are in a symmetrical form.

Preferably, the armature windings on both sides of the short primary mover are also symmetrically distributed in the slot structure.

Preferably, the tooth space structure comprises primary slots and primary teeth which are sequentially staggered, and the armature winding is arranged in the primary slots.

Preferably, the armature winding of the primary slot is a double-layer distributed winding.

Preferably, the long secondary stator comprises a plurality of magnetic pole modules which are sequentially installed along the motion direction of the short primary rotor.

Preferably, the magnetic pole modules comprise iron rib magnetic pole modules, the iron rib magnetic pole modules comprise magnetic barriers, magnetic bridges and longitudinal iron ribs, the magnetic barriers and the magnetic bridges are arranged in a plurality and are arranged in a staggered mode, and the longitudinal iron ribs are parallel to the motion direction of the short primary rotor and are used for connecting the ends of the magnetic bridges into a whole.

Preferably, the magnetic pole modules comprise non-iron rib magnetic pole modules, each non-iron rib magnetic pole module comprises a plurality of magnetic barriers, magnetic bridges and non-magnetic-conductive filling materials, the magnetic barriers and the magnetic bridges are arranged in a staggered mode, and the non-magnetic-conductive filling materials are filled in the magnetic barriers to connect the magnetic bridges into a whole.

Preferably, the outer contour of the magnetic barrier is a multi-linear type formed by linear segments.

Preferably, the outer contour of the magnetic barrier is streamline formed by spline curves.

Compared with the prior art, the invention has the following advantages:

(1) the bilateral short primary synchronous reluctance linear motor provided by the invention benefits from the structural characteristics and the thrust generation mechanism of the synchronous reluctance motor, has smaller torque fluctuation, lower vibration and noise compared with a switched reluctance linear motor, has higher efficiency and wider speed regulation range compared with a linear induction motor, and more importantly adopts a bilateral structure: the two sides of the short primary rotor are respectively provided with a tooth space structure and are provided with armature windings, and the two sides of the short primary rotor are correspondingly provided with long secondary stators, so that the synchronous reluctance motor has higher thrust and thrust density compared with a synchronous reluctance motor with a single-side structure with the same length, the thrust is 2 times that of the synchronous reluctance motor with the single-side structure with the same length, and meanwhile, the attraction generated by the two sides of the short primary rotor and the long secondary stators are mutually offset, so that the whole short primary rotor has no normal force, the requirement on the mechanical structure strength of the whole linear motor is reduced, and the structure cost is reduced;

(2) the short primary rotor consists of the symmetrical tooth sockets and the integer distributed windings, so that the propelling force density of the whole motor is improved;

(3) the long primary stator is composed of modularized magnetic pole modules, and the thrust of the motor can be further improved and the torque fluctuation can be reduced by reasonably optimizing the magnetic barriers, the magnetic bridge shape and the selection of longitudinal iron ribs.

Drawings

FIG. 1 is a top plan view of an overall double-sided short primary synchronous reluctance linear motor of the present invention;

FIG. 2 is a schematic structural diagram of a short primary mover of the present invention;

fig. 3 is a schematic structural view of a magnetic pole module in embodiment 1;

fig. 4 is a schematic structural view of a magnetic pole module in embodiment 2;

fig. 5 is a schematic structural view of a magnetic pole module in embodiment 3;

fig. 6 is a schematic structural view of a magnetic pole module in embodiment 4;

in the figure, 1 is a short primary mover, 2 is a long secondary stator, 3 is a gap, 11 is a primary core, 12 is an armature winding, 13 is a primary slot, 21 is a long secondary stator surface, 22 is a magnetic pole module, 131 is a first primary slot, 132 is a second primary slot, 141 is a first primary tooth, 142 is a second primary tooth, 221 is a magnetic barrier, 222 is a magnetic bridge, and 223 is a longitudinal iron rib.

Detailed Description

The invention is described in detail below with reference to the figures and specific embodiments. Note that the following description of the embodiments is merely a substantial example, and the present invention is not intended to be limited to the application or the use thereof, and is not limited to the following embodiments.

Example 1

As shown in fig. 1, the present embodiment provides a double-sided short primary synchronous reluctance linear motor, which includes two symmetrically arranged long secondary stators 2 and a short primary mover 1 installed between the long secondary stators 2 and capable of reciprocating, wherein a gap 3 is provided between the short primary mover 1 and the long secondary stators 2 on both sides, the short primary mover 1 includes a primary core 11 and an armature winding 12, both sides of the primary core 11, which are close to a surface 21 of the long secondary stator, are provided with a tooth space structure, and the armature winding 12 is disposed in the tooth space structure. The long secondary stator 2 comprises several magnetic pole modules 22 mounted in sequence along the direction of motion of the short primary mover 1.

The invention sets tooth space structure and arranges armature winding 12 on two sides of short primary rotor 1, and sets long secondary stator 2 on two sides of short primary rotor 1, to form double side structure, wherein the double side short primary synchronous reluctance linear motor is an electromechanical energy conversion device with excitation and electric energy input only on short primary rotor 1, the long secondary stator 2 on two sides has no excitation, the long secondary stator 2 is a robust structure formed by simple silicon steel sheet lamination, so no copper consumption is generated. Compared with a synchronous reluctance motor with a single-side structure and the same length, the synchronous reluctance motor with the single-side structure has larger thrust and thrust density, the thrust is 2 times that of the synchronous reluctance motor with the single-side structure and the same length, and meanwhile, due to the fact that attraction forces generated by the two sides of the short primary rotor 1 and the long secondary stator 2 are mutually offset, the whole short primary rotor 1 cannot generate normal force, the requirement on the mechanical structure strength of the whole linear motor is reduced, and therefore cost is reduced.

As shown in fig. 2, the slot structure on both sides of the short primary mover 1 is in a symmetrical form, and the armature windings 12 on both sides of the short primary mover 1 are also distributed in the slot structure in a symmetrical form. The slot structure includes primary slots 13 and primary teeth arranged in sequence in a staggered manner, and the armature windings 12 are disposed in the primary slots 13. In this embodiment, as shown in fig. 2, the magnetic core comprises a first primary slot 131 and a second primary slot 132 which are symmetrical, and a first primary tooth 141 and a second primary tooth 142 which are symmetrical, the first primary slot 131 and the first primary tooth 141 are sequentially arranged in a staggered manner, the second primary slot 132 and the second primary tooth 142 are sequentially arranged in a staggered manner, armature windings 12 are symmetrically installed in the first primary slot 131 and the second primary slot 132, the armature windings 12 are double-layer distributed windings, in this embodiment, 3 phases of double-layer distributed windings with the number of slots of each phase being 3 are adopted, and the used material is copper, aluminum or a superconducting material. In order to further weaken the end effect, the scheme of single-layer arrangement of partial windings at two ends of the short primary rotor 1 or reasonable cutting of primary teeth at two ends of the short primary rotor 1 can be adopted.

As shown in fig. 3, the magnetic pole module 22 includes a magnetic pole module 22 with iron ribs, the magnetic pole module 22 with or without iron ribs includes magnetic barriers 221, magnetic bridges 222 and longitudinal iron ribs 223, the magnetic barriers 221 and the magnetic bridges 222 are arranged in a plurality and staggered, and the longitudinal iron ribs 223 are parallel to the moving direction of the short primary mover 1 and are used for connecting the ends of the magnetic bridges 222 into a whole. The outer contour of the magnetic barrier 221 is a polygonal line formed by straight line segments. The optimal design of the magnetic barriers 221 in the pole modules 22 is the key to determine the thrust properties of the motor given the dimensioning of the motor geometry. The determination of the salient pole ratio corresponding to the thickness of the magnetic barrier 221 and the thickness of the magnetic bridge 222 is changed along with the external characteristic requirements of the motor, and can be set according to specific requirements.

Example 2

The present embodiment provides a double-sided short primary synchronous reluctance linear motor, the overall structure of which is substantially the same as that of embodiment 1, except that in the present embodiment, the magnetic pole module 22 is as shown in fig. 4, the outer profile of the magnetic barrier 221 in the magnetic pole module 22 is a streamline formed by spline curves, and the rest is the same as that of embodiment 1. The main difference between the embodiments 1 and 2 is that the corresponding permeability ratio and the magnetic flux line near the outer contour of the magnetic barrier 221 are different, thereby generating the difference between the motor salient pole ratio and the torque density, and the mechanical strength of the long secondary stator 2 needs to be considered comprehensively for selection.

Example 3

The present embodiment provides a double-sided short primary synchronous reluctance linear motor, the overall structure of the motor is substantially the same as that of embodiment 1, except that in this embodiment, the magnetic pole module 22 is as shown in fig. 5, the magnetic pole module 22 includes a non-iron rib magnetic pole module 22, the non-iron rib magnetic pole module 22 includes a magnetic barrier 221, magnetic bridges 222 and a non-magnetic conductive filling material, the magnetic barrier 221 and the magnetic bridges 222 are both arranged in a plurality and staggered arrangement, the non-magnetic conductive filling material is filled in the magnetic barrier 221 to connect the magnetic bridges 222 into a whole, and the outer contour of the magnetic barrier 221 is a multi-linear type formed by straight line segments. The rest is the same as the embodiment 1, and the main difference between the embodiment 1 and the embodiment 3 is that: from the viewpoint of the electromagnetic characteristics of the motor, the longitudinal iron rib 223 in embodiment 1 is useless, the longitudinal iron rib 223 plays the role of a magnetic circuit switch in a magnetic circuit, and the motor needs a larger current to saturate during operation, so that the reactive power input of the motor is increased. From the mechanical characteristics of the machine, the presence of the longitudinal iron ribs 223 guarantees the mechanical integrity of the pole module 22, and the elimination of the longitudinal iron ribs 223 increases the difficulty of machining the pole module 22. In practical application, on the premise that the structural strength requirement of the stator is met, the magnetic pole modules 22 without the longitudinal iron ribs 223 can be filled and packaged by using non-magnetic conducting materials such as epoxy ethylene, and therefore the power factor of the motor can be improved, and meanwhile torque fluctuation can be improved.

Example 4

The present embodiment provides a double-sided short primary synchronous reluctance linear motor, the overall structure of the motor and the magnetic pole module 22 are substantially the same as those of embodiment 3, except that in this embodiment, the magnetic pole module 22 is as shown in fig. 6, the outer profile of the magnetic barrier 221 in the magnetic pole module 22 is a streamline formed by spline curves, and the rest is the same as that of embodiment 3. The main difference between the embodiments 3 and 4 is that the corresponding permeability ratio and the magnetic flux line near the outer contour of the magnetic barrier 221 are different, thereby generating the difference between the motor salient pole ratio and the torque density, and the mechanical strength of the long secondary stator 2 needs to be considered comprehensively for selection.

The above embodiments are merely examples and do not limit the scope of the present invention. These embodiments may be implemented in other various manners, and various omissions, substitutions, and changes may be made without departing from the technical spirit of the present invention.