CN111953108B

CN111953108B - Non-overlapping winding coreless linear permanent magnet synchronous motor

Info

Publication number: CN111953108B
Application number: CN202010800069.8A
Authority: CN
Inventors: 寇宝泉; 黄昌闯; 王硕; 张浩泉
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2022-11-29
Anticipated expiration: 2040-08-11
Also published as: CN111953108A

Abstract

A non-overlapping winding coreless linear permanent magnet synchronous motor belongs to the technical field of motors. The invention aims at the problems of poor insulation characteristic and large thrust fluctuation of the primary winding of the traditional linear motor. The two secondary stages are respectively positioned at the two transverse sides of the primary stage and are mechanically connected together, and an air gap is formed between each secondary stage and the primary stage; the secondary comprises a secondary iron core and a plurality of secondary permanent magnets, and the plurality of secondary permanent magnets are sequentially and alternately fixed on the air gap side of the secondary iron core along the N and S poles of the moving direction; the primary comprises a winding substrate and an m-phase armature winding; the winding substrate is rectangular; the armature winding comprises 2jm coil groups; jm coil groups are respectively stuck and fixed on two transverse sides of the winding substrate (110) along the motion direction; each coil group comprises k coils, and the k coils belong to the same phase and are continuously arranged along the motion direction; the coils on the two sides of the winding substrate are correspondingly arranged. The invention can reduce the eddy current loss of the permanent magnet when the motor runs at high speed and reduce the thrust fluctuation of the motor.

Description

Non-overlapping winding coreless linear permanent magnet synchronous motor

Technical Field

The invention relates to a non-overlapping winding coreless linear permanent magnet synchronous motor, and belongs to the technical field of motors.

Background

The bilateral secondary coreless linear permanent magnet synchronous motor has the advantages of strong overload capacity, small thrust fluctuation, high dynamic response and the like, and has wide application prospect in a high-speed, high-precision and high-acceleration linear motion control system.

In the prior art, the coreless primary winding of the coreless linear permanent magnet synchronous motor is generally formed by winding a multi-phase coil, and then each phase of the coil is connected and regularly arranged according to an integer slot single-layer winding (fig. 17) or a fractional slot concentrated winding (fig. 18) along the motion direction. In order to strengthen the structural strength of the primary winding, the whole coil is encapsulated by epoxy resin and is solidified to form an integral primary.

However, with the improvement of the production efficiency in the field of manufacturing high-end equipment, the acceleration and the speed of the linear servo motor in the precision motion control system are increased, the input power and the output thrust of the motor are also increased, so that the voltage level of the servo driver is gradually increased, and the insulation performance of the linear motor faces more and more severe tests. Meanwhile, the precision of the linear servo system is higher and higher, and the requirement on the thrust fluctuation of the motor is more and more strict. Therefore, the defects of poor insulation property, large thrust fluctuation and the like existing in the traditional linear motor winding arrangement mode are gradually shown.

Disclosure of Invention

Aiming at the problems of poor insulation characteristic and large thrust fluctuation of a primary winding of a traditional linear motor, the invention provides a non-overlapping winding coreless linear permanent magnet synchronous motor.

The first technical scheme provided by the invention is as follows: a non-overlapping winding coreless linear permanent magnet synchronous motor comprises a primary 100 and two secondaries 200, wherein the two secondaries 200 are respectively positioned at two transverse sides of the primary 100, the two secondaries 200 are mechanically connected together, and an air gap is formed between each secondary 200 and the primary 100;

the secondary 200 comprises a secondary iron core 210 and a plurality of secondary permanent magnets 220, wherein the plurality of secondary permanent magnets 220 are sequentially and alternately fixed on the air gap side of the secondary iron core 210 along the N and S poles in the motion direction;

the primary 100 comprises a winding substrate 110 and m-phase armature windings 120, wherein m is a natural number which is greater than or equal to 3;

the winding substrate 110 is rectangular; the armature winding 120 comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two transverse sides of the winding substrate 110 along the movement direction; each coil group comprises k coils, the k coils belong to the same phase and are continuously arranged along the motion direction, and k is a positive integer; the coils on both sides of the winding substrate 110 are arranged correspondingly; when k is an even number, the winding directions of the coils in all the coil groups are forward winding, backward winding, forward winding and backward winding in turn, wherein the winding directions are 8230; when k is an odd number, the winding directions of the coils in the coil group of the odd number phase are forward winding, backward winding, forward winding and backward winding \8230, the winding directions of the coils in the coil group of the even number phase are backward winding, forward winding, backward winding and forward winding \8230, the winding directions of the coils in the coil group of the odd number phase are forward winding, backward winding and forward winding \8230, and the winding directions of the coils in the coil group of the even number phase are 8230;

the coils are in a track shape, the length occupied by each coil along the motion direction is (km + 1) tau/km, and tau is the polar distance of the secondary permanent magnet 220; the interval between adjacent coil groups is tau/m.

The second technical scheme provided by the invention is as follows: a non-overlapping winding coreless linear permanent magnet synchronous motor comprises a primary 100 and two secondaries 200, wherein the two secondaries 200 are respectively positioned at two transverse sides of the primary 100, the two secondaries 200 are mechanically connected together, and an air gap is formed between each secondary 200 and the primary 100;

the secondary magnet 200 comprises a secondary iron core 210 and a plurality of secondary permanent magnets 220, wherein the plurality of secondary permanent magnets 220 are sequentially and alternately fixed on the air gap side of the secondary iron core 210 along the N and S poles of the moving direction;

the primary 100 comprises a winding substrate 110 and an m-phase armature winding 120, wherein m is a natural number greater than or equal to 3;

the winding substrate 110 is rectangular; the armature winding 120 comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two transverse sides of the winding substrate 110 along the motion direction; each coil group comprises k coils, the k coils belong to the same phase and are continuously arranged along the motion direction, and k is a positive integer; the coils on both sides of the winding substrate 110 are arranged correspondingly;

when k is an even number, the winding directions of the coils in all the coil groups are forward winding, backward winding, forward winding and backward winding in turn, wherein the winding directions are 8230; the interval between adjacent phase coil groups is 2 tau/m; when k is an odd number, the winding directions of the coils in the coil group of the odd number phase are forward winding, backward winding, forward winding and backward winding \8230, the winding directions of the coils in the coil group of the even number phase are backward winding, forward winding, backward winding and forward winding \8230, the winding directions of the coils in the coil group of the odd number phase are forward winding, backward winding and forward winding \8230, and the winding directions of the coils in the coil group of the even number phase are 8230; the interval between the adjacent coil groups is tau (1-2/m); τ is the pole pitch of the secondary permanent magnet 220;

the coils are racetrack shaped and each occupies a length τ in the direction of motion.

According to the non-overlapping winding coreless linear permanent magnet synchronous motor of the first technical scheme of the invention, the position difference of the coils of the corresponding phases at the two sides of the winding substrate 110 along the motion direction is tau/m.

The third technical scheme provided by the invention is as follows: a non-overlapping winding coreless linear permanent magnet synchronous motor comprises a primary 100 and two secondary 200, wherein the two secondary 200 are respectively positioned at two transverse sides of the primary 100, the two secondary 200 are mechanically connected together, and an air gap is formed between each secondary 200 and the primary 100;

the winding substrate 110 is rectangular; the armature winding 120 comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two transverse sides of the winding substrate 110 along the movement direction; the coils in all the coil groups on each side of the winding substrate 110, adjacent m coils belong to different phases; the coils on both sides of the winding substrate 110 are symmetrically arranged;

the coil is in a runway shape; when m is an odd number, setting i as a positive integer, and when i is an odd number, enabling each coil to occupy a length tau (im + 1)/im in the motion direction; when i is an even number, each coil occupies a length τ (im + 2)/im in the direction of motion; when m is an even number, each coil occupies a length τ (im + 2)/im in the direction of motion; τ is the pole pitch of the secondary permanent magnet 220.

The fourth technical scheme provided by the invention is as follows: a non-overlapping winding coreless linear permanent magnet synchronous motor comprises a primary 100 and two secondaries 200, wherein the two secondaries 200 are respectively positioned at two transverse sides of the primary 100, the two secondaries 200 are mechanically connected together, and an air gap is formed between each secondary 200 and the primary 100;

the primary 100 includes a winding substrate 110 and two sets of three-phase armature windings 120; the winding substrate 110 is rectangular; a set of three-phase armature winding 120 is respectively stuck and fixed on two transverse sides of the winding substrate 110, coils forming the three-phase armature winding 120 are in a runway shape, the coils in each set of three-phase armature winding 120 are arranged on the winding substrate 110 along the motion direction, and the coils are not overlapped; the corresponding phase coils in the two sets of three-phase armature windings 120 are connected in series, the length occupied by each coil along the motion direction is 2 tau/3, the position difference of the corresponding phase coils in the two sets of three-phase armature windings 120 along the motion direction is tau, and the current directions in the corresponding phase coils of the two sets of three-phase armature windings 120 are opposite; τ is the pole pitch of the secondary permanent magnet 220.

According to the non-overlapping winding coreless linear permanent magnet synchronous motor in the fourth technical scheme of the invention, the cross section of the effective side of the coil in the moving direction is in a parallelogram shape.

According to the non-overlapping winding coreless linear permanent magnet synchronous motor of the present invention, the primary 100 further includes a cooling structure in any one of the following forms:

1) A cooling liquid flow channel is arranged inside the winding substrate 110;

2) The winding substrate 110 comprises a winding section and a liquid cooling section from bottom to top, wherein the winding section is used for arranging an armature winding 120; a cooling liquid flow channel is arranged in the liquid cooling section; the upper end of each coil is in close contact with the liquid cooling section;

3) The primary 100 further comprises a liquid cooling substrate, wherein the liquid cooling substrate is in a thin and long strip shape, is fixed on the upper surface of the winding substrate 110, and is positioned in the same plane with the winding substrate 110; a cooling liquid flow channel is arranged in the liquid cooling substrate; the upper end portion of each coil is in close contact with the liquid-cooled substrate.

According to the non-overlapping winding coreless linear permanent magnet synchronous motor, the primary 100 further comprises two liquid cooling pipelines, and the liquid cooling pipelines are long-strip-shaped; the two liquid cooling pipelines are respectively fixed at the upper end parts of the coils at the two sides of the winding substrate 110 and are in close contact with the coils; or fixed on the side of the coil top on both sides of the winding substrate 110 and closely contacted with the coil.

According to the non-overlapping winding coreless linear permanent magnet synchronous motor of the present invention, the lower side of the lower end portion and the upper side of the upper end portion of the coil on both sides of the winding substrate 110, or the two lateral sides of the lower end portion and the upper end portion of the coil are respectively bonded and fixed with a strip-shaped magnetic material along the moving direction.

According to the non-overlapping winding coreless linear permanent magnet synchronous motor, coils at corresponding positions on two transverse sides of a winding substrate 110 belong to the same phase and are connected in series; or the coils at the corresponding positions on the two lateral sides of the winding substrate 110 are connected in parallel; or after the coils on the two lateral sides of the winding substrate 110 are respectively connected into the m-phase armature windings 120, the two sets of m-phase armature windings 120 are connected in parallel.

The invention has the beneficial effects that: the motor of the invention has the advantages of simple primary manufacturing process, low cost, easy insulation of the winding, good performance, less armature magnetomotive force harmonic wave, low thrust fluctuation and small secondary eddy current loss.

The invention adopts the multi-phase non-overlapping windings which are arranged in a special fixed mode and are arranged on the two sides of the high-strength winding substrate, and improves the primary structure strength of the motor, the arrangement precision of the armature coils and the insulation performance of the windings by continuously and tightly arranging the coils belonging to the same phase and arranging the coils of different phases in a spaced way; by arranging the armature winding coils on the two sides of the substrate in a phase-shifting manner along the motion direction, the main magnetomotive force harmonics generated by the windings on the two sides can be mutually offset, the magnetomotive force harmonics can be restrained, the eddy current loss of the permanent magnet when the motor runs at high speed is reduced, and the thrust fluctuation of the motor is reduced.

Drawings

Fig. 1 is a schematic view of an unfolded structure of a coreless linear permanent magnet synchronous motor with non-overlapping windings according to a first embodiment of the present invention; wherein m =3,k =2,j =4;

FIG. 2 is a schematic diagram of the primary structure in a first embodiment;

FIG. 3 is a schematic diagram of the armature windings on two sides of a winding substrate according to an embodiment;

FIG. 4 is a schematic diagram of a secondary structure in accordance with a first embodiment;

FIG. 5 is a schematic diagram of the relative position of the primary and secondary stages in a first embodiment;

fig. 6 is a schematic structural view of the motor provided with the elongated magnetic material according to the first embodiment;

fig. 7 is a schematic diagram of an expanded structure of coils of corresponding phases on two sides of a winding substrate when the position of the coils differs by τ/m along the moving direction in the first embodiment;

fig. 8 is a schematic view showing the correspondence of armature windings to both sides of the winding substrate of fig. 7;

fig. 9 is a schematic expanded structural view of another form of the non-overlapping winding coreless linear permanent magnet synchronous motor according to the first embodiment of the present invention; wherein m =3,k =3,j =6;

FIG. 10 is a schematic diagram of a primary structure corresponding to FIG. 9;

fig. 11 is a schematic diagram of the armature winding correspondence corresponding to both sides of the substrate of fig. 9;

FIG. 12 is a schematic diagram of a secondary structure corresponding to FIG. 9;

FIG. 13 is a schematic diagram of the relative positions of the primary and secondary stages corresponding to FIG. 9;

fig. 14 is a schematic view of the structure of the motor corresponding to fig. 9 when an elongated magnetic material is provided;

FIG. 15 is a schematic diagram of the expanded structure corresponding to FIG. 9 when the positions of the coils of the corresponding phases on the two sides of the winding substrate are different by τ/m along the moving direction;

fig. 16 is a schematic view showing the correspondence of armature windings to both sides of the winding substrate of fig. 15;

FIG. 17 is a schematic diagram of an integer slot single layer winding form of a prior art ironless linear permanent magnet synchronous machine;

fig. 18 is a schematic diagram of a fractional-slot concentrated winding form of a conventional coreless linear permanent magnet synchronous motor.

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.

It should be noted that the embodiments and features of the embodiments of the present invention may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

First embodiment, referring to fig. 1 to 8, a first aspect of the present invention provides a non-overlapping winding coreless linear permanent magnet synchronous motor, including a primary 100 and two secondary 200, where the two secondary 200 are respectively located at two lateral sides of the primary 100, the two secondary 200 are mechanically connected together, and an air gap is formed between each secondary 200 and the primary 100;

the coils are in a runway shape, the length occupied by each coil along the motion direction is (km + 1) tau/km, and tau is the polar distance of the secondary permanent magnet 220; the spacing between adjacent coil sets is τ/m.

In the armature winding 120 of the present embodiment, coils of the same phase are continuously provided to form a coil group; the coil groups of different phases are arranged at intervals. When each coil group comprises an even number of coils, the odd number of phases of the first phase, the third phase and the fifth phase (8230) \\8230, the coil group and the even number of phases of the second phase, the fourth phase and the sixth phase (8230) \8230and the even number of phases of the second phase, the fourth phase and the sixth phase (8230) \8230, wherein the winding directions of the coils in the coil group are forward winding, reverse winding, forward winding and reverse winding (8230) \8230; 8230and; when each coil group comprises an odd number of coils, the winding directions of the coils in the coil groups of the odd number phases on the winding substrate are forward winding, backward winding, forward winding and backward winding \8230;, the winding directions of the coils in the coil groups of the even number phases on the winding substrate are backward winding, forward winding, backward winding and forward winding \8230;.

Referring to fig. 1 to 6, in a first embodiment of the present invention, a primary winding is mainly composed of a three-phase armature winding and a winding substrate. The letters in fig. 1 represent the winding phases; the 12 coil groups are respectively stuck and fixed on the two transverse sides of the rectangular winding substrate, the coils on the two transverse sides of the winding substrate are symmetrically arranged, the coils at the transverse symmetrical positions belong to the same phase, and the two coil groups are connected in series. In fig. 1, τ is the pole pitch of the motor. The armature winding on each side of the winding substrate is composed of 6 coil groups, 2 coils of each coil group belong to the same phase, 2 racetrack-shaped coils of each coil group are continuously arranged along the motion direction, the length of the position occupied by each coil is 7 tau/6, tau is the polar distance of the secondary permanent magnet, and the interval between the coil groups of adjacent phases is (tau/3); the winding directions of the coils of the odd-phase (A-phase and C-phase) coil group and the even-phase (B-phase) coil group are (forward winding, backward winding), (forward winding and backward winding) in sequence. Each secondary is mainly composed of a secondary iron core and a permanent magnet. And the 20 permanent magnets are sequentially and alternately arranged and fixed on the air gap side of the flat secondary iron core along the N and S poles in the motion direction to form 20 secondary magnetic poles.

Further, as shown in fig. 7 and 8, in the present embodiment, the positions of the coils of the corresponding phases on both sides of the winding substrate 110 are different by τ/m in the moving direction. In fig. 7 and 8, the position of the corresponding phase coil on both sides of the winding substrate 110 differs by τ/3 in the moving direction.

Referring to fig. 9 to 14, in a second embodiment of the present embodiment, the primary winding is mainly composed of a three-phase armature winding and a winding substrate. The 12 coil groups are respectively adhered and fixed on the two transverse sides of the rectangular winding substrate, the coils on the two transverse sides of the winding substrate are symmetrically arranged, the coils at the transverse symmetrical positions belong to the same phase, and the two coils are connected in series. The armature winding on each side of the winding substrate is composed of 6 coil groups, 3 coils of each coil group belong to the same phase, 3 racetrack-shaped coils of each coil group are continuously arranged along the motion direction, the length of the position occupied by each coil is (10 tau/9), and the interval between the coil groups of adjacent phases is (tau/3); the winding directions of the coils of the coil group with the odd number phase (A phase and C phase) on the winding substrate are sequentially (forward winding, backward winding, forward winding), (backward winding, forward winding and backward winding), and the winding directions of the coils of the coil group with the even number phase (B phase) on the winding substrate are sequentially (backward winding, forward winding, backward winding), (forward winding, backward winding and forward winding).

Each secondary is mainly composed of a secondary iron core and a permanent magnet. The 26 permanent magnets are sequentially and alternately arranged and fixed on the air gap side of the flat secondary iron core along the moving direction N and S poles to form 26 secondary magnetic poles.

Further, as shown in fig. 15 and 16, the positions of the coils of the corresponding phases on both sides of the winding substrate 110 in the moving direction are different by τ/m in this embodiment. In fig. 15 and 16, the position of the corresponding phase coil on both sides of the winding substrate 110 differs by τ/3 in the moving direction.

Second embodiment, referring to fig. 1 to 16, a second aspect of the present invention provides a non-overlapping winding coreless linear permanent magnet synchronous motor, including a primary 100 and two secondary 200, where the two secondary 200 are respectively located at two lateral sides of the primary 100, the two secondary 200 are mechanically connected together, and an air gap is formed between each secondary 200 and the primary 100;

when k is an even number, the winding directions of the coils in all the coil groups are forward winding, backward winding, forward winding and backward winding \8230insequence; the interval between adjacent phase coil groups is 2 tau/m; when k is an odd number, the winding directions of the coils in the coil group of the odd number phase are forward winding, backward winding, forward winding and backward winding \8230, the winding directions of the coils in the coil group of the even number phase are backward winding, forward winding, backward winding and forward winding \8230, the winding directions of the coils in the coil group of the odd number phase are forward winding, backward winding and forward winding \8230, and the winding directions of the coils in the coil group of the even number phase are 8230; the interval between the adjacent coil groups is tau (1-2/m); τ is the pole pitch of the secondary permanent magnet 220;

the coils are racetrack shaped, each occupying a length τ in the direction of motion.

In the present embodiment, coils of the same phase are arranged in series to form a coil group, and the coils are aligned in pitch.

In a third embodiment, as shown in fig. 1 to 16, a third aspect of the present invention provides a non-overlapping winding coreless linear permanent magnet synchronous motor, which includes a primary 100 and two secondary 200, where the two secondary 200 are respectively located at two lateral sides of the primary 100, the two secondary 200 are mechanically connected together, and an air gap is formed between each secondary 200 and the primary 100;

the winding substrate 110 is rectangular; the armature winding 120 includes 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two transverse sides of the winding substrate 110 along the movement direction; the coils in all the coil groups on each side of the winding substrate 110, adjacent m coils belong to different phases; the coils on both sides of the winding substrate 110 are symmetrically arranged;

the coil is in a runway shape; the coil is in a runway shape; when m is an odd number, setting i as a positive integer, and when i is an odd number, enabling each coil to occupy a length tau (im + 1)/im in the motion direction; when i is an even number, the length occupied by each coil in the motion direction is tau (im + 2)/im; when m is an even number, each coil occupies a length τ (im + 2)/im in the direction of motion; τ is the pole pitch of the secondary permanent magnet 220.

In this embodiment, the coils in all the coil groups can be continuously and uniformly arranged on the winding substrate 110, and the effect is better when the number of phases is larger.

Fourth embodiment, as shown in fig. 1 to 16, a fourth aspect of the present invention provides a non-overlapping winding coreless linear permanent magnet synchronous motor, including a primary 100 and two secondary 200, where the two secondary 200 are respectively located at two lateral sides of the primary 100, the two secondary 200 are mechanically connected together, and an air gap is formed between each secondary 200 and the primary 100;

the primary 100 includes a winding substrate 110 and two sets of three-phase armature windings 120; the winding substrate 110 is rectangular; a set of three-phase armature windings 120 are respectively adhered and fixed on two transverse sides of the winding substrate 110, coils forming the three-phase armature windings 120 are in a runway shape, the coils in each set of three-phase armature windings 120 are arranged on the winding substrate 110 along the motion direction, and the coils are not overlapped; the corresponding phase coils in the two sets of three-phase armature windings 120 are connected in series, the length occupied by each coil along the motion direction is 2 tau/3, the position difference tau of the corresponding phase coils in the two sets of three-phase armature windings 120 along the motion direction, and the current directions in the corresponding phase coils of the two sets of three-phase armature windings 120 are opposite; τ is the pole pitch of the secondary permanent magnet 220.

Further, in a fourth specific embodiment, a cross-sectional shape of the coil effective side in the moving direction is a parallelogram.

Still further, in an embodiment of the present invention, the primary 100 further comprises a cooling structure, in any one of the following forms:

1) A cooling liquid flow channel is arranged inside the winding substrate 110;

In the present invention, the motor may be a primary liquid cooling structure. The 2 nd form in this embodiment is a structure in which the winding segment for attaching the coil effective edge and the liquid cooling segment for attaching the coil end portion to the winding substrate 110 are integrated.

In the present embodiment, when the motor structure adopts the mode 3), the motor structure may further include a heat conduction plate that is connected to the liquid-cooled substrate and is in close contact with the outer sides of both end portions of the winding coil.

Alternatively, in an embodiment of the present invention, the primary stage 100 further includes two liquid cooling pipes, and the liquid cooling pipes are elongated; the two liquid cooling pipelines are respectively fixed at the upper end parts of the coils at the two sides of the winding substrate 110 and are in close contact with the coils; or fixed on the side of the coil top on both sides of the winding substrate 110 and closely contacted with the coil.

Further, referring to fig. 6 and 14, in the embodiment of the invention, the lower side of the lower end portion and the upper side of the coil on both sides of the winding substrate 110, or the two lateral sides of the lower end portion and the upper end portion of the coil are respectively bonded and fixed with the strip-shaped magnetic material along the moving direction. The long-strip-shaped magnetic material can increase the leakage reactance of the winding.

Still further, in the embodiment of the present invention, the coils at the corresponding positions on the two lateral sides of the winding substrate 110 belong to the same phase and are connected in series; or the coils at the corresponding positions on the two lateral sides of the winding substrate 110 are connected in parallel; or after the coils on the two lateral sides of the winding substrate 110 are respectively connected into the m-phase armature windings 120, the two sets of m-phase armature windings 120 are connected in parallel.

In the present invention, the winding substrate 110 may be a thin plate made of a non-magnetic high-strength material, and the primary winding substrate is encapsulated with epoxy resin. The secondary 200 may be of a surface-mounted permanent magnet structure, an embedded permanent magnet structure, or a Halbach permanent magnet array structure.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that various dependent claims and the features described herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

Claims

1. A non-overlapping winding coreless linear permanent magnet synchronous motor is characterized by comprising a primary (100) and two secondary (200), wherein the two secondary (200) are respectively positioned at two transverse sides of the primary (100), the two secondary (200) are mechanically connected together, and an air gap is formed between each secondary (200) and the primary (100);

the secondary (200) comprises a secondary iron core (210) and a plurality of secondary permanent magnets (220), wherein the plurality of secondary permanent magnets (220) are sequentially and alternately fixed on the air gap side of the secondary iron core (210) along the N and S poles in the motion direction;

the primary (100) comprises a winding substrate (110) and an m-phase armature winding (120), wherein m is a natural number greater than or equal to 3;

the winding substrate (110) is rectangular; the armature winding (120) comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two transverse sides of the winding substrate (110) along the motion direction; each coil group comprises k coils, the k coils belong to the same phase and are continuously arranged along the motion direction, and k is a positive integer; the coils on two sides of the winding substrate (110) are arranged correspondingly; when k is an even number, the winding directions of the coils in all the coil groups are forward winding, backward winding, forward winding and backward winding \8230insequence; when k is an odd number, the winding directions of the coils in the coil groups of the odd number phases are forward winding, backward winding, forward winding and backward winding \8230, the winding directions of the coils in the coil groups of the even number phases are backward winding, forward winding, backward winding and forward winding \8230, and the winding directions of the coils in the coil groups of the odd number phases are 8230;

the coils are in a track shape, the length occupied by each coil along the motion direction is (km + 1) tau/km, and tau is the polar distance of the secondary permanent magnet (220); the spacing between adjacent coil sets is τ/m.

2. The coreless linear permanent magnet synchronous motor of claim 1, wherein the position of the coils of the corresponding phases on both sides of the winding substrate (110) differs by τ/m in the moving direction.

3. A non-overlapping winding coreless linear permanent magnet synchronous motor is characterized by comprising a primary (100) and two secondary (200), wherein the two secondary (200) are respectively positioned at two transverse sides of the primary (100), the two secondary (200) are mechanically connected together, and an air gap is formed between each secondary (200) and the primary (100);

the winding substrate (110) is rectangular; the armature winding (120) comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two transverse sides of the winding substrate (110) along the motion direction; each coil group comprises k coils, the k coils belong to the same phase and are continuously arranged along the motion direction, and k is a positive integer; the coils on the two sides of the winding substrate (110) are arranged correspondingly;

when k is an even number, the winding directions of the coils in all the coil groups are forward winding, backward winding, forward winding and backward winding in turn, wherein the winding directions are 8230; the interval between adjacent phase coil groups is 2 tau/m; when k is an odd number, the winding directions of the coils in the coil group of the odd number phase are forward winding, backward winding, forward winding and backward winding \8230, the winding directions of the coils in the coil group of the even number phase are backward winding, forward winding, backward winding and forward winding \8230, the winding directions of the coils in the coil group of the odd number phase are forward winding, backward winding and forward winding \8230, and the winding directions of the coils in the coil group of the even number phase are 8230; the interval between the adjacent coil groups is tau (1-2/m); τ is the pole pitch of the secondary permanent magnet (220);

4. A non-overlapping winding coreless linear permanent magnet synchronous machine according to any of claims 1 to 3, characterized in that the primary (100) further includes a cooling structure in any of the following forms:

1) A cooling liquid flow channel is arranged in the winding substrate (110);

2) The winding substrate (110) comprises a winding section and a liquid cooling section from bottom to top, and the winding section is used for arranging an armature winding (120); a cooling liquid flow channel is arranged in the liquid cooling section; the upper end of each coil is in close contact with the liquid cooling section;

3) The primary winding (100) further comprises a liquid cooling substrate, wherein the liquid cooling substrate is in a thin and long strip shape, is fixed on the upper surface of the winding substrate (110), and is positioned in the same plane with the winding substrate (110); a cooling liquid flow channel is arranged in the liquid cooling substrate; the upper end of each coil is in close contact with the liquid-cooled substrate.

5. A non-overlapping winding coreless linear permanent magnet synchronous machine according to any of the claims 1 to 3, characterized in that the primary (100) further comprises two liquid cooling ducts, the liquid cooling ducts being elongated; the two liquid cooling pipelines are respectively fixed at the upper end parts of the coils at the two sides of the winding substrate (110) and are in close contact with the coils; or fixed on the side of the coil top at both sides of the winding substrate (110) and closely contacted with the coil.

6. The coreless linear permanent magnet synchronous motor with non-overlapping windings according to any one of claims 1 to 3, wherein the lower end portion and the upper end portion of the coil on both sides of the winding substrate (110), or the two lateral sides of the lower end portion and the upper end portion of the coil, are respectively fixedly adhered with a long-strip-shaped magnetic material along the moving direction.

7. The coreless linear permanent magnet synchronous motor with the non-overlapping windings according to claim 1 or 3, characterized in that coils at corresponding positions on both lateral sides of the winding substrate (110) belong to the same phase and are connected in series; or the coils at the corresponding positions on the two transverse sides of the winding substrate (110) are connected in parallel; or after the coils on the two transverse sides of the winding substrate (110) are respectively connected into the m-phase armature windings (120), the two sets of m-phase armature windings (120) are connected in parallel.