CN111934506A

CN111934506A - Non-overlapping winding axial magnetic field permanent magnet synchronous motor

Info

Publication number: CN111934506A
Application number: CN202010800086.1A
Authority: CN
Inventors: 寇宝泉; 黄昌闯; 张浩泉; 王硕; 张赫
Original assignee: Harbin Institute of Technology
Current assignee: Harbin Institute of Technology
Priority date: 2020-08-11
Filing date: 2020-08-11
Publication date: 2020-11-13
Anticipated expiration: 2040-08-11
Also published as: CN111934506B

Abstract

A non-overlapping winding axial magnetic field permanent magnet synchronous motor belongs to the technical field of motors. The invention aims at the problems of poor insulation property and large eddy current loss of the permanent magnet of the rotor of the existing axial magnetic field permanent magnet synchronous motor. Two rotors of the motor are positioned at two axial sides of a stator, and an air gap is formed between each rotor and the stator; the stator comprises a winding substrate and an m-phase armature winding; the winding substrate is annular; the armature winding comprises 2jm coil groups; jm coil groups are respectively stuck and fixed on two axial sides of the winding substrate; each coil group comprises k coils; the coils on two axial sides of the winding substrate are arranged correspondingly; the k coils of each coil group belong to the same phase and are continuously arranged along the circumferential direction of the winding substrate; the rotor comprises a rotor core and a plurality of permanent magnets, wherein the permanent magnets are sequentially and alternately fixed on the air gap side of the rotor core along the N, S poles in the circumferential direction. The invention can effectively improve the insulation characteristic of the winding and reduce the eddy current loss of the permanent magnet when the motor runs at high speed.

Description

Non-overlapping winding axial magnetic field permanent magnet synchronous motor

Technical Field

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

Background

The axial magnetic field permanent magnet synchronous motor is used as a modern high-performance servo motor and a large-torque direct drive motor, has the characteristics of high peak torque, strong overload capacity, small torque fluctuation, large torque/weight ratio, high efficiency, high power factor, stable low-speed operation, small vibration, low noise, short axial size, compact structure, capability of being manufactured into a multi-air-gap combined structure to further improve the torque and the like, and has wide application prospect in power systems such as numerical control machines, robots, flywheel energy storage systems, high-speed centrifuges, electric vehicles, full-electric ships, underwater vehicles and the like. The axial magnetic field coreless permanent magnet synchronous motor can also be used as a generator, and has good application prospect in occasions such as an inertial energy storage power supply, a mobile platform power supply and the like.

In the armature winding of the axial magnetic field permanent magnet synchronous motor in the prior art, generally, after multi-phase coils are wound and formed, the coils of each phase are radially arranged along the circumferential direction according to the connection mode of lap winding or wave winding. In order to strengthen the structural strength of the armature winding, the whole armature is encapsulated by epoxy resin and is solidified to form an integral armature winding disc. However, such a stator coreless armature winding is poor in manufacturing manufacturability and difficult to maintain after machining and molding. In addition, the armature winding is completely encapsulated in the epoxy resin with low heat conductivity coefficient, so that the heat dissipation performance is poor, and the defect of poor heat dissipation effect in a high-power occasion is more obvious. When the armature winding adopts a fractional slot concentrated winding, the armature magnetomotive force has high harmonic content, the eddy current loss of the rotor permanent magnet is large, and the efficiency of the motor is low.

Disclosure of Invention

The invention provides a non-overlapping winding axial magnetic field permanent magnet synchronous motor, aiming at the problems of poor insulation property and large eddy current loss of a rotor permanent magnet of the existing axial magnetic field permanent magnet synchronous motor.

The first technical scheme provided by the invention is as follows: the permanent magnet synchronous motor with the non-overlapping winding axial magnetic field comprises a stator 100 and two rotors 200, wherein the two rotors 200 are positioned at two axial sides of the stator 100, the two rotors 200 are mechanically connected together, and an air gap is formed between each rotor 200 and the stator;

the stator 100 includes a winding substrate 110 and m-phase armature windings 120, where m is a natural number greater than or equal to 3;

the winding substrate 110 is annular; the armature winding 120 comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two axial sides of the winding substrate 110; each coil group comprises k coils, and the coils are in fan shapes; the coils on the two axial sides of the winding substrate 110 are arranged correspondingly; k coils of each coil group belong to the same phase and are continuously arranged along the circumferential direction of the winding substrate 110, and k is a positive integer; the electrical angle occupied by each coil is (km +1)180 DEG/km; the interval between the adjacent coil groups is 180 degrees/m electrical angle; 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 sequence; when k is an odd number, the winding directions of the coils in the coil group with the odd number are forward winding, backward winding, forward winding and backward winding … … in sequence, and the winding directions of the coils in the coil group with the even number are backward winding, forward winding, backward winding and forward winding … … in sequence;

the rotor 200 includes a rotor core 210 and a plurality of permanent magnets 220, the rotor core 210 is circular, and the plurality of permanent magnets 220 are sequentially and alternately fixed on the air gap side of the rotor core 210 along the circumferential direction N, S.

The second technical scheme provided by the invention is as follows: a non-overlapping winding axial magnetic field permanent magnet synchronous motor comprises a stator 100 and two rotors 200, wherein the two rotors 200 are positioned at two axial sides of the stator 100, the two rotors 200 are mechanically connected together, and an air gap is formed between each rotor 200 and the stator;

the winding substrate 110 is annular; the armature winding 120 comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two axial sides of the winding substrate 110; each coil group comprises k coils, and the coils are in fan shapes; the coils on the two axial sides of the winding substrate 110 are arranged correspondingly; k coils of each coil group belong to the same phase and are continuously arranged along the circumferential direction of the winding substrate 110, and k is a positive integer; the electrical angle occupied by each coil is 180 degrees; 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 sequence; the interval between the adjacent coil groups is 360 degrees/m electrical angle; when k is an odd number, the winding directions of the coils in the coil group with the odd number are forward winding, backward winding, forward winding and backward winding … … in sequence, and the winding directions of the coils in the coil group with the even number are backward winding, forward winding, backward winding and forward winding … … in sequence; the interval between the adjacent coil groups is 180 degrees (1-2/m) in electrical angle;

According to the non-overlapping winding axial magnetic field permanent magnet synchronous motor of the first technical scheme of the invention, the positions of the coils of the corresponding phases at the two sides of the winding substrate 110 along the circumferential direction have an electrical angle difference of (180 °/m).

The third technical scheme provided by the invention is as follows: a non-overlapping winding axial magnetic field permanent magnet synchronous motor comprises a stator 100 and two rotors 200, wherein the two rotors 200 are positioned at two axial sides of the stator 100, the two rotors 200 are mechanically connected together, and an air gap is formed between each rotor 200 and the stator;

the winding substrate 110 is annular; the armature winding 120 comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two axial sides of the winding substrate 110; the coils in all coil groups on each side of the winding substrate 110 in the axial direction, wherein m adjacent coils belong to different phases; the coils on both sides of the winding substrate 110 in the axial direction are symmetrically arranged; the coil is fan-shaped; when m is an odd number, setting i as a positive integer, and when i is an odd number, the electrical angle occupied by each coil is 180 degrees (im + 1)/im; when i is an even number, each coil occupies a length of 180 ° (im +2)/im in the direction of motion; when m is an even number, the electrical angle occupied by each coil is 180 ° (im + 2)/im;

The fourth technical scheme provided by the invention is as follows: a non-overlapping winding axial magnetic field permanent magnet synchronous motor comprises a stator 100 and two rotors 200, wherein the two rotors 200 are positioned at two axial sides of the stator 100, the two rotors 200 are mechanically connected together, and an air gap is formed between each rotor 200 and the stator;

the stator 100 includes a winding substrate 110 and two sets of three-phase armature windings 120; the winding substrate 110 is annular; a set of three-phase armature winding 120 is respectively stuck and fixed on two axial sides of the winding substrate 110, coils forming the three-phase armature winding 120 are in a fan shape, the coils in each set of three-phase armature winding 120 are arranged on the winding substrate 110 along the circumferential direction, and the coils are not overlapped; the electrical angle occupied by each coil is 120 °; the coils of corresponding phases in the two sets of three-phase armature windings 120 are connected in series, and have an electrical angle difference of 180 degrees along the direction, and the directions of currents in the coils of corresponding phases in the two sets of three-phase armature windings 120 are opposite;

According to the non-overlapping winding axial magnetic field permanent magnet synchronous motor, the stator 100 further comprises a liquid cooling substrate, wherein the liquid cooling substrate is annular and is sleeved on the outer ring surface of the winding substrate 110 and is positioned in the same plane with the winding substrate 110; a cooling liquid flow channel is formed in the liquid cooling substrate; the outer end portions of the respective coils of the armature winding 120 are in close contact with the liquid-cooled substrate.

According to the non-overlapping winding axial magnetic field permanent magnet synchronous motor, the stator 100 adopts a modular structure; the stator 100 includes a plurality of stator modules, all of which are fixed to a stator frame in a circumferential direction; each stator module includes a sector winding substrate and a corresponding coil, all of the sector winding substrates constitute a winding substrate 110, and all of the coils constitute an armature winding 120.

According to the non-overlapping winding axial magnetic field permanent magnet synchronous motor of the first, second and third technical schemes, coils at corresponding positions on two axial sides of the winding substrate 110 belong to the same phase and are connected in series; or the coils at the mirror image positions on the two axial sides of the winding substrate 110 are connected in parallel; or after the coils on the two axial 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.

According to the non-overlapping winding axial magnetic field permanent magnet synchronous motor, the stator 100 further comprises two annular liquid cooling pipelines, and two liquid cooling pipelines are respectively fixed on two axial sides of the winding substrate 110; the liquid cooling ducts are fixed radially outside or on both axial sides of the respective coil outer diameter side end portions on each axial side of the winding substrate 110, and are in close contact with the coil outer diameter side end portions.

According to the non-overlapping winding axial magnetic field permanent magnet synchronous motor of the present invention, arc-shaped magnetic material strips are adhered and fixed to the inner side of the inner end portion and the outer side of the outer end portion of each coil of the armature winding 120, or to the outer side of the inner end portion and the outer end portion in the axial direction.

The invention has the beneficial effects that: the non-overlapping winding axial magnetic field permanent magnet synchronous motor mainly comprises a stator and two rotors; the armature winding has high mechanical strength, good cooling effect, low torque fluctuation of the motor and less eddy current loss of the permanent magnet.

The armature winding adopts a special coil arrangement mode to form the axial magnetic field permanent magnet synchronous motor, and the coils belonging to the same phase are continuously and tightly arranged, and the coils of different phases are arranged in a spaced way, so that the insulation property of the winding can be effectively improved, and the permanent magnet synchronous motor is suitable for high-voltage driving occasions; by arranging the double-layer armature winding coils in a phase-shifting manner along the circumferential direction, magnetomotive force harmonics generated by the two layers of windings can be mutually offset, the magnetomotive force harmonics can be restrained, the eddy current loss of the permanent magnet when the motor runs at a high speed is reduced, the torque fluctuation of the motor is reduced, and the efficiency of the motor is improved.

Drawings

Fig. 1 is a schematic view of an unfolded structure of a non-overlapping winding axial magnetic field permanent magnet synchronous motor according to a first embodiment of the present invention; wherein m is 3, k is 2, and j is 4;

FIG. 2 is a schematic view of a stator structure corresponding to FIG. 1;

FIG. 3 is a schematic view of a rotor structure corresponding to FIG. 1;

FIG. 4 is a schematic three-dimensional structure of a non-overlapping winding axial field permanent magnet synchronous machine corresponding to FIG. 1;

fig. 5 is a schematic diagram of a motor unfolding structure when corresponding phase coils on two sides of a winding substrate have phase shift corresponding to fig. 1;

FIG. 6 is a stator coil schematic corresponding to FIG. 5;

FIG. 7 is a schematic view of a stator and rotor configuration of the motor corresponding to FIG. 5;

FIG. 8 is a schematic three-dimensional structure of the motor corresponding to FIG. 5;

fig. 9 is a schematic view of another development structure of the non-overlapping winding axial magnetic field permanent magnet synchronous motor according to the first embodiment of the present invention; m is 3, k is 3, j is 6;

FIG. 10 is a schematic view of a stator structure corresponding to FIG. 9;

FIG. 11 is a schematic view of a rotor structure corresponding to FIG. 9;

FIG. 12 is a schematic three-dimensional structure of the motor corresponding to FIG. 9;

fig. 13 is a schematic view of the motor development structure corresponding to fig. 9 when there is phase shift in the corresponding phase coils on both sides of the winding substrate;

fig. 14 is a stator coil schematic diagram corresponding to fig. 13;

FIG. 15 is a schematic view of a stator and rotor configuration of the motor corresponding to FIG. 13;

fig. 16 is a schematic diagram of a three-dimensional structure of the motor corresponding to fig. 13.

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 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, as shown in fig. 1 to 16, a first aspect of the present invention provides a non-overlapping winding axial magnetic field permanent magnet synchronous motor, which includes a stator 100 and two rotors 200, where the two rotors 200 are located at two axial sides of the stator 100, the two rotors 200 are mechanically connected together, and an air gap is formed between each rotor 200 and the stator;

the winding substrate 110 is annular; the armature winding 120 comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two axial sides of the winding substrate 110; each coil group comprises k coils, and the coils are in fan shapes; the coils on the two axial sides of the winding substrate 110 are arranged correspondingly; k coils of each coil group belong to the same phase and are continuously arranged along the circumferential direction of the winding substrate 110, and k is a positive integer; the electrical angle occupied by each coil is (km +1)180 DEG/km; the interval between the adjacent coil groups is 180 degrees/m electrical angle; 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 sequence; when k is an odd number, the winding directions of the coils in the coil group of the odd phase (the first phase, the third phase and the fifth phase … …) are forward winding, backward winding, forward winding and backward winding … … in sequence, and the winding directions of the coils in the coil group of the even phase (the second phase, the fourth phase and the sixth phase … …) are backward winding, forward winding, backward winding and forward winding … … in sequence;

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.

Further, as shown in fig. 5 to 8 and 13 to 16, the positions of the coils of the corresponding phases on both sides of the winding substrate 110 are different by an electrical angle (180 °/m) in the circumferential direction.

Specific examples of the present embodiment include:

the first embodiment is as follows: as shown in fig. 1 to 4, the stator of the non-overlapping winding axial field permanent magnet synchronous motor mainly comprises a three-phase armature winding and a winding substrate. The winding substrate is circular, coils forming the winding are fan-shaped, 12 coil groups are respectively adhered and fixed on two axial sides of the circular winding substrate, the coils on the two axial sides of the winding substrate are symmetrically arranged, the coils at the axially symmetric positions belong to the same phase, and the coils are connected in series. In fig. 1 τ is the pole pitch of the motor, each pole pitch corresponding to 180 electrical degrees. 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 fan-shaped coils of each coil group are continuously arranged along the circumferential direction, the electrical angle occupied by each coil is 210 degrees, and the interval between adjacent phase coil groups is 60 degrees; 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 and backward winding in sequence. Each rotor is mainly composed of a rotor core and permanent magnets. The 16 permanent magnets are fixed on the air gap side of the disc-shaped rotor core along the circumferential direction N, S poles in sequence and alternately, and 16 magnetic poles of the rotor are formed.

As shown in fig. 5 to 8, the main difference from the armature windings shown in fig. 1 to 4 is that the positions of the corresponding phase coils of the armature windings on both sides of the winding substrate in the axial direction are different by 60 ° in electrical angle in the circumferential direction.

Example two: as shown in fig. 9 to 12, the stator of the non-overlapping winding axial field permanent magnet synchronous motor is mainly composed of a three-phase armature winding and a winding substrate. The winding substrate is circular, coils forming the winding are fan-shaped, 36 coil groups are respectively adhered and fixed on two axial sides of the circular winding substrate, the coils on the two axial sides of the winding substrate are symmetrically arranged, the coils at the axially symmetric positions belong to the same phase, and the two coils are connected in series. Fig. 9 is an expanded view of the motor winding, where τ is the pole pitch of the motor, each pole pitch corresponding to 180 electrical degrees. 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 fan-shaped coils of each coil group are continuously arranged along the circumferential direction, the electrical angle occupied by each coil is 200 degrees, and the interval between adjacent phase coil groups is 60 degrees; the winding directions of the coils of the coil group with the odd number phases (A phase and C phase) are forward winding, backward winding and forward winding in sequence, and the winding directions of the coils of the coil group with the even number phases (B phase) are backward winding, forward winding and backward winding in sequence. Each rotor is mainly composed of a rotor core and permanent magnets. The 16 permanent magnets are fixed on the air gap side of the disc-shaped rotor core along the circumferential direction N, S poles in sequence and alternately, and 22 magnetic poles of the rotor are formed.

As shown in fig. 13 to 16, the main difference from the armature windings shown in fig. 9 to 12 is that the positions of the corresponding phase coils of the armature windings on both sides of the winding substrate in the axial direction are different by 60 ° in electrical angle in the circumferential direction.

Second embodiment, as shown in fig. 1 to 16, a second aspect of the present invention provides a non-overlapping winding axial magnetic field permanent magnet synchronous motor, which includes a stator 100 and two rotors 200, wherein the two rotors 200 are located at two axial sides of the stator 100, the two rotors 200 are mechanically connected together, and an air gap is formed between each rotor 200 and the stator;

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 axial magnetic field permanent magnet synchronous motor, including a stator 100 and two rotors 200, where the two rotors 200 are located at two axial sides of the stator 100, the two rotors 200 are mechanically connected together, and an air gap is formed between each rotor 200 and the stator;

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 axial magnetic field permanent magnet synchronous motor, which includes a stator 100 and two rotors 200, wherein the two rotors 200 are located at two axial sides of the stator 100, the two rotors 200 are mechanically connected together, and an air gap is formed between each rotor 200 and the stator;

In the two sets of three-phase armature windings 120 in the present embodiment, the phase shift position difference is provided on both sides of the winding substrate 110 corresponding to the phase coil.

Further, in the embodiment of the present invention, the stator 100 further includes a liquid cooling substrate, which is annular and is sleeved on the outer ring surface of the winding substrate 110 and is in the same plane as the winding substrate 110; a cooling liquid flow channel is formed in the liquid cooling substrate; the outer end portions of the respective coils of the armature winding 120 are in close contact with the liquid-cooled substrate.

The motor according to this embodiment is a stator liquid cooling structure, and the inner diameter of the liquid cooling substrate is larger than the outer diameter of the winding substrate 110.

Still further, in the embodiment of the present invention, the stator 100 has a modular structure; the stator 100 includes a plurality of stator modules, all of which are fixed to a stator frame in a circumferential direction; each stator module includes a sector winding substrate and a corresponding coil, all of the sector winding substrates constitute a winding substrate 110, and all of the coils constitute an armature winding 120. The coils on each sector winding substrate are non-overlapping. The winding directions of coils at the mirror image positions on two axial sides of the fan-shaped winding substrate are the same and belong to the same phase, and the two coils are connected in series.

Still further, in the first, second and third embodiments of the present invention, the coils at the corresponding positions on the two axial sides of the winding substrate 110 belong to the same phase and are connected in series; or the coils at the mirror image positions on the two axial sides of the winding substrate 110 are connected in parallel; or after the coils on the two axial 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.

Still further, in the embodiment of the present invention, the stator 100 further includes two annular liquid cooling pipes, one liquid cooling pipe is fixed on each of two axial sides of the winding substrate 110; the liquid cooling ducts are fixed radially outside or on both axial sides of the respective coil outer diameter side end portions on each axial side of the winding substrate 110, and are in close contact with the coil outer diameter side end portions.

Still further, in the embodiment of the present invention, arc-shaped magnetic material strips are adhered and fixed to the inner side and the outer side of the inner end portion and the outer end portion of each coil of the armature winding 120, or the outer side of the inner end portion and the outer end portion in the axial direction, along the circumferential direction, so as to increase the winding leakage reactance.

In an embodiment of the present invention, the winding substrate 110 includes a thin plate made of a non-magnetic high-strength material.

In an embodiment of the present invention, the stator or stator module may be potted with epoxy.

The non-overlapping winding axial magnetic field permanent magnet synchronous motor can be in a double-rotor and single-stator structure, and can also be in a multi-rotor and multi-stator structure; it can be used as both a motor and a generator.

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 features described in different dependent claims and 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 axial magnetic field permanent magnet synchronous motor is characterized by comprising a stator (100) and two rotors (200), wherein the two rotors (200) are positioned at two axial sides of the stator (100), the two rotors (200) are mechanically connected together, and an air gap is formed between each rotor (200) and the stator;

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

the winding substrate (110) is annular; the armature winding (120) comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two axial sides of the winding substrate (110); each coil group comprises k coils, and the coils are in fan shapes; the coils on two axial sides of the winding substrate (110) are arranged correspondingly; k coils of each coil group belong to the same phase and are continuously arranged along the circumferential direction of the winding substrate (110), and k is a positive integer; the electrical angle occupied by each coil is (km +1)180 DEG/km; the interval between the adjacent coil groups is 180 degrees/m electrical angle; 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 sequence; when k is an odd number, the winding directions of the coils in the coil group with the odd number are forward winding, backward winding, forward winding and backward winding … … in sequence, and the winding directions of the coils in the coil group with the even number are backward winding, forward winding, backward winding and forward winding … … in sequence;

the rotor (200) comprises a rotor core (210) and a plurality of permanent magnets (220), the rotor core (210) is annular, and the permanent magnets (220) are sequentially and alternately fixed on the air gap side of the rotor core (210) along the N, S poles in the circumferential direction.

2. A non-overlapping winding axial magnetic field permanent magnet synchronous motor is characterized by comprising a stator (100) and two rotors (200), wherein the two rotors (200) are positioned at two axial sides of the stator (100), the two rotors (200) are mechanically connected together, and an air gap is formed between each rotor (200) and the stator;

the winding substrate (110) is annular; the armature winding (120) comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two axial sides of the winding substrate (110); each coil group comprises k coils, and the coils are in fan shapes; the coils on two axial sides of the winding substrate (110) are arranged correspondingly; k coils of each coil group belong to the same phase and are continuously arranged along the circumferential direction of the winding substrate (110), and k is a positive integer; the electrical angle occupied by each coil is 180 degrees; 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 sequence; the interval between the adjacent coil groups is 360 degrees/m electrical angle; when k is an odd number, the winding directions of the coils in the coil group with the odd number are forward winding, backward winding, forward winding and backward winding … … in sequence, and the winding directions of the coils in the coil group with the even number are backward winding, forward winding, backward winding and forward winding … … in sequence; the interval between the adjacent coil groups is 180 degrees (1-2/m) in electrical angle;

3. The non-overlapping winding axial field permanent magnet synchronous machine according to claim 1, characterized in that the corresponding phase coils on both sides of the winding substrate (110) are positioned at an electrical angle difference (180 °/m) in the circumferential direction.

4. A non-overlapping winding axial magnetic field permanent magnet synchronous motor is characterized by comprising a stator (100) and two rotors (200), wherein the two rotors (200) are positioned at two axial sides of the stator (100), the two rotors (200) are mechanically connected together, and an air gap is formed between each rotor (200) and the stator;

the winding substrate (110) is annular; the armature winding (120) comprises 2jm coil groups, j is a positive integer; jm coil groups are respectively stuck and fixed on two axial sides of the winding substrate (110); the winding substrate (110) is axially provided with coils in all coil groups on each side, and m adjacent coils belong to different phases; the coils on two axial sides of the winding substrate (110) are symmetrically arranged; the coil is fan-shaped; when m is an odd number, setting i as a positive integer, and when i is an odd number, the electrical angle occupied by each coil is 180 degrees (im + 1)/im; when i is an even number, each coil occupies a length of 180 ° (im +2)/im in the direction of motion; when m is an even number, the electrical angle occupied by each coil is 180 ° (im + 2)/im;

5. A non-overlapping winding axial magnetic field permanent magnet synchronous motor is characterized by comprising a stator (100) and two rotors (200), wherein the two rotors (200) are positioned at two axial sides of the stator (100), the two rotors (200) are mechanically connected together, and an air gap is formed between each rotor (200) and the stator;

the stator (100) comprises a winding substrate (110) and two sets of three-phase armature windings (120); the winding substrate (110) is annular; a set of three-phase armature winding (120) is respectively stuck and fixed on two axial sides of the winding substrate (110), coils forming the three-phase armature winding (120) are in a fan shape, the coils in each set of three-phase armature winding (120) are arranged on the winding substrate (110) along the circumferential direction, and the coils are not overlapped; the electrical angle occupied by each coil is 120 °; corresponding phase coils in the two sets of three-phase armature windings (120) are connected in series, the position difference in the direction is 180 degrees in electrical angle, and the directions of currents in the corresponding phase coils in the two sets of three-phase armature windings (120) are opposite;

6. The non-overlapping winding axial field permanent magnet synchronous machine of any of claims 1 to 5,

the stator (100) further comprises a liquid cooling substrate, wherein the liquid cooling substrate is annular and is sleeved on the outer ring surface of the winding substrate (110) and is positioned in the same plane with the winding substrate (110); a cooling liquid flow channel is formed in the liquid cooling substrate; the outer end of each coil of the armature winding (120) is in close contact with the liquid-cooled substrate.

7. The non-overlapping winding axial field permanent magnet synchronous machine according to any of claims 1 to 6, characterized in that the stator (100) is of modular construction; the stator (100) comprises a plurality of stator modules, all of which are fixed on the stator frame along the circumferential direction; each stator module comprises fan-shaped winding substrates and corresponding coils, all the fan-shaped winding substrates form a winding substrate (110), and all the coils form an armature winding (120).

8. The non-overlapping winding axial magnetic field permanent magnet synchronous motor according to any one of claims 1 to 4, characterized in that coils at corresponding positions on two axial sides of the winding substrate (110) belong to the same phase and are connected in series; or coils at the mirror image positions on two axial sides of the winding substrate (110) are connected in parallel; or after the coils on the two axial 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.

9. The non-overlapping winding axial magnetic field permanent magnet synchronous machine according to any of claims 1 to 5, characterized in that the stator (100) further comprises two annular liquid cooling pipes, one liquid cooling pipe being fixed to each of two axial sides of the winding substrate (110); the liquid cooling ducts are fixed to the radially outer side or both axial sides of the respective coil outer diameter side end portions on each axial side of the winding substrate (110), and are in close contact with the coil outer diameter side end portions.

10. The non-overlapping winding axial magnetic field permanent magnet synchronous motor according to any one of claims 1 to 5, characterized in that arc-shaped magnetic material strips are fixedly adhered along the circumferential direction on the inner side of the inner end part and the outer side of the outer end part of each coil of the armature winding (120) or on the axial outer side of the inner end part and the outer end part.