CN110957876B - Bilateral Flux Switching Permanent Magnet Linear Motor - Google Patents

Abstract

The invention discloses a bilateral magnetic flux switching permanent magnet linear motor which comprises bilateral secondary stators and a primary rotor arranged between the stators, wherein the primary rotor comprises 6 primary rotor units, a connecting bridge is arranged between each primary rotor unit and the corresponding primary rotor unit, each primary rotor unit comprises two H-shaped magnetic conduction iron cores, and a permanent magnet is arranged between the two H-shaped magnetic conduction iron cores; a plurality of secondary teeth are formed on the secondary stator at intervals, a secondary slot is formed between each secondary tooth and each secondary tooth, a yoke part is formed at the bottom of each secondary slot, a magnetic conduction tooth is formed on the H-shaped magnetic conduction iron core opposite to each secondary tooth, and a winding installation slot is formed between the magnetic conduction teeth on the same side; the bilateral secondary stator is used as a fixed part, the primary rotor is used as a moving part, and the primary rotor makes linear motion in the middle of the bilateral secondary stator to form the motor with the bilateral flat plate structure. The linear motor has the advantages of high utilization rate, low magnetic leakage and the like.

Description

Bilateral Flux Switching Permanent Magnet Linear Motor

technical field

The invention relates to the technical field of motors, in particular to a bilateral magnetic flux switching permanent magnet linear motor.

Background technique

At present, with the development of industrial technology, the use of linear motors in rail transit, vertical lift and other fields has increasingly become a hot spot of application technology. This is due to the low efficiency of the traditional rotary motor relying on the mechanical transmission device and cannot meet the requirements of high-efficiency operation in terms of various performances. Compared with the traditional rotary motor, the linear motor eliminates the mechanical transmission device and directly generates electromagnetic force , has the advantages of high thrust density, low loss and low noise. Therefore, using a linear motor instead of a rotary motor can overcome the above shortcomings of the rotary motor in the above-mentioned applications and improve the operation efficiency of the entire drive system.

The long secondary of the existing bilateral magnetic flux switching permanent magnet linear motor is only composed of magnetically conductive material, and the primary is only composed of armature winding and magnetically conductive material, which has high reliability and simple structure, and is suitable for long-stroke conditions. However, there are still problems such as serious magnetic flux leakage, low utilization rate of magnetic conductive materials, high cost, and low thrust density, which limit its application in the fields of transportation tracks and vertical lifts.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is how to provide a bilateral magnetic flux switching permanent magnet linear motor with high utilization rate and low magnetic leakage.

In order to solve the above-mentioned technical problems, the technical solution adopted by the present invention is: a bilateral magnetic flux switching permanent magnet linear motor, which is characterized in that: it includes bilateral secondary stators and a primary mover arranged between the stators, and the The length of the secondary stator is greater than the length of the primary mover, there is a gap between the primary mover and the bilateral secondary stator, the primary mover includes 6 primary mover units, and the primary mover unit There is a connection bridge with the primary mover unit, and the adjacent units are filled and fastened by the connection bridge. The connection bridge is a thermally conductive but non-magnetically conductive material and is spaced from the unit to form a primary cooling ventilation structure; each primary mover The unit includes two H-shaped conductive cores, and a permanent magnet is arranged between the two H-shaped conductive cores; a plurality of secondary teeth are formed at intervals on the secondary stator, and the secondary teeth are connected to the secondary teeth. A secondary slot is formed between the secondary slots, a yoke is formed at the bottom of the secondary slot, magnetic conductive teeth are formed on the H-shaped magnetic core opposite to the secondary teeth, and a winding installation is formed between the magnetic conductive teeth on the same side Slots; an armature winding is spaced between the permanent magnets in each primary mover unit and the winding installation slots of the H-shaped conductive magnetic cores on both sides, and the windings of the H-shaped conductive magnetic cores of each primary mover unit are installed Only one-phase armature winding is arranged in the slot; the bilateral secondary stator is used as the fixed part, the primary mover is the moving part, and the primary mover performs linear motion in the middle of the bilateral secondary stator to form a motor with a bilateral flat plate structure.

Preferably, the gap is 1 mm.

A further technical solution is: secondary slots are formed between the secondary teeth of the secondary stator, a first inclined edge is formed between the secondary teeth and the secondary slots, and the Right-angle chamfering is performed on both sides, and a second inclined edge and a third inclined edge are formed on the tip portions on both sides of the secondary teeth.

A further technical solution is that: right-angle chamfering is performed on both sides of the magnetic conductive teeth of each of the H-shaped magnetic conductive cores, and a fourth inclined edge and a fifth inclined edge are formed on the tips of the two sides of the magnetic conductive tooth. .

A further technical solution is as follows: one magnetic conductive tooth on one side of the H-shaped magnetic conductive core and its corresponding secondary tooth are dislocated, and one magnetic conductive tooth on the other side of the H-shaped magnetic conductive core corresponds to it. The secondary teeth are set facing each other.

A further technical solution is that: when the magnetic conductive teeth and the secondary teeth are dislocated, the right end of the fourth hypotenuse and the left end of the second hypotenuse are arranged in direct opposition.

A further technical solution is that: between the primary slot width τ _t1 and the secondary pole pitch τ _ρ , and between the phase spacing ρ and the secondary pole pitch τ _ρ , the following formulas are met:

τ _t1 =[(m+1/2)]τ _ρ , where m is 1; ρ=(n±2/3)τ _ρ , where n is an integer 5, and the distance between the three-phase windings is 120 electrical degrees. requirements; the tooth pitch between primary units τ _t2 =(m+1/6)τ _ρ , where m is 1, and the primary slot width τ _t1 refers to the two magnetic conductive cores on the same side of the same H-type magnetic conductive core The center distance between the teeth (, the secondary pole distance τ _ρ refers to the center distance between the adjacent two secondary teeth, the phase spacing ρ refers to the center distance between the adjacent two permanent magnets, and τ _t2 is the connecting bridge. The center distance between two adjacent magnetic conductive teeth on both sides.

A further technical solution is: the permanent magnets are magnetized horizontally, and the magnetization directions of the permanent magnets in adjacent primary mover units are opposite, and the magnetization directions of the permanent magnets corresponding to the primary mover units belonging to the same phase are opposite.

A further technical solution is: starting from a certain winding installation slot, the armature windings in the winding installation slot are sequentially arranged in a certain phase sequence, wherein the armature winding in any winding installation slot is electrically connected to its adjacent side. The winding directions of the armature windings are opposite, and the in-phase armature windings of the same primary mover unit are wound in opposite directions, and 6 consecutive primary mover units constitute a complete primary mover.

A further technical solution is: any one-phase armature winding of the primary corresponding to each primary mover unit is composed of a pair of concentrated armature windings, and then the concentrated armature windings belonging to adjacent phases are arranged in sequence, and six primary movers are arranged. The units are arranged in sequence, and the centralized armature windings belonging to the same phase are controlled in parallel and individually, or connected in series as one-phase windings.

The beneficial effects of the above technical solutions are: the linear motor adopts an H-shaped magnetic core, which effectively solves the problem of magnetic leakage of the primary mover; the primary unitized design not only increases the magnetic flux density and thrust density, but also greatly Reduce the weight of the motor, reduce the cost of motor manufacturing, and improve the utilization rate of motor materials; reduce the thickness of the secondary yoke, further reduce the cost and weight of the secondary, and improve the output power and load of the motor. Due to the simple secondary structure and only composed of magnetically conductive materials, the optimized filling cogging structure makes the magnetic flux flow of the secondary magnetic field lines more continuous, which not only reduces the magnetic flux leakage but also makes the motor more in line with the principle of minimum reluctance. According to the principle of flux switching motor and finite element analysis, the shape of the permanent magnet is optimized, which not only effectively increases the thrust output density of the motor, but also effectively reduces the positioning force and improves the running performance of the motor , while reducing the amount of permanent magnets and saving the cost of motor production; with the help of finite element analysis, the primary and secondary tooth profiles optimized by right-angle chamfering technology can effectively reduce the positioning force, but will not reduce the average torque of the motor, Thereby, the running performance of the motor is improved; the bilateral stators are placed asymmetrically, which effectively reduces the positioning force; the connecting bridge between the adjacent primary mover units is made of thermally conductive but non-magnetically conductive material and forms a primary cooling ventilation structure with the air vents , which is conducive to the heat dissipation and cooling of the permanent magnet and the winding, and improves the output capacity and service life of the motor. This structure not only greatly improves the utilization rate of materials, but also reduces the manufacturing cost of the motor.

Description of drawings

The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

1 is a schematic structural diagram of a linear motor according to an embodiment of the present invention;

Fig. 2 is the magnetic field distribution diagram of the linear motor according to the embodiment of the present invention;

3a is a schematic diagram of the distribution of primary magnetic field lines in the prior art;

3b is a schematic diagram of the distribution of primary magnetic field lines in the linear motor according to the embodiment of the present invention;

Fig. 4a is a magnetic field distribution diagram of a magnetic conducting core in the prior art;

Fig. 4b is the magnetic field distribution diagram of the H-shaped conductive magnet core in the linear motor according to the embodiment of the present invention;

Fig. 5a is a distribution diagram of magnetic field lines of the primary tooth portion and the secondary tooth portion in the prior art;

Fig. 5b is a distribution diagram of magnetic field lines after secondary optimization in the linear motor according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of the asymmetric distribution and placement of stator teeth in the linear motor according to the embodiment of the present invention;

7 is a schematic structural diagram of a stator in a linear motor according to an embodiment of the present invention;

8 is a schematic diagram of the matching structure of the H-shaped magnetic conducting core and the permanent magnet in the linear motor according to the embodiment of the present invention;

9 is a schematic structural diagram of the primary and secondary teeth in the linear motor according to the embodiment of the present invention;

10 is a schematic structural diagram of a connection bridge and ventilation in the linear motor according to the embodiment of the present invention;

Among them: 1. Secondary stator; 2. Primary mover; 3. Gap; 4. Primary mover unit; 5. Connection bridge; 6. Cooling ventilation structure; 7. H-shaped magnetic core; 8. Permanent magnet; 9 , secondary tooth; 10, secondary slot; 11, yoke; 12, magnetic conductive tooth; 13, winding installation slot; 14, armature winding; 15, first inclined side; 16, second inclined side; 17, The third inclined side; 18, the fourth inclined side; 19, the fifth inclined side.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Many specific details are set forth in the following description to facilitate a full understanding of the present invention, but the present invention can also be implemented in other ways different from those described herein, and those skilled in the art can do so without departing from the connotation of the present invention. Similar promotion, therefore, the present invention is not limited by the specific embodiments disclosed below.

As shown in FIGS. 1-2 , an embodiment of the present invention discloses a bilateral magnetic flux switching permanent magnet linear motor, which includes a bilateral secondary stator 1 and a primary mover 2 arranged between the stators. The secondary The length of the stator 1 is greater than the length of the primary mover 2, and there is a gap 3 between the primary mover 2 and the bilateral secondary stator, preferably, the gap is 1 mm; the primary mover includes 6 The primary mover unit 4, there is a connection bridge 5 between the primary mover unit 4 and the primary mover unit 4, and the connection bridge 5 is filled and fastened between adjacent units, and the connection bridge 5 is thermally conductive but not magnetically conductive The primary cooling ventilation structure 6 is formed by the material and the unit interval; each primary mover unit 4 includes two H-shaped magnetic cores 7, and a permanent magnet 8 is arranged between the two H-shaped magnetic cores 7; the secondary A number of secondary teeth 9 are formed at intervals on the stator 1, and secondary slots 10 are formed between the secondary teeth and the secondary teeth. Magnetic conductive teeth 12 are formed on the H-shaped conductive magnetic core 7 opposite the stage teeth 9, and winding installation slots 13 are formed between the magnetic conductive teeth 12 on the same side; the permanent magnet 8 in each primary mover unit 4 and the H on both sides An armature winding 14 is spaced between the winding installation slots 13 of the H-shaped conductive core 7, and only one phase of the armature winding 14 is arranged in the winding installation slot 13 of the H-shaped conductive core 7 of each primary mover unit 4. ; Take the bilateral secondary stator as a fixed part, the primary mover 2 as a moving part, and use the primary mover 2 to perform linear motion in the middle of the bilateral secondary stator to form a motor with a bilateral flat plate structure.

As shown in Figure 1, the following requirements are met between the primary slot width τ _t1 and the secondary pole pitch τ _ρ , and between the phase spacing ρ and the secondary pole pitch τ _ρ : τ _t1 =[(m+1/2)]τ _ρ , where m is 1; ρ=(n±2/3)τ _ρ , where n is an integer, and the distance satisfies the requirement that the three-phase windings differ by 120 electrical degrees; the tooth spacing between primary units τ _t2 =(m+ 1/6)τ _ρ , where m is 1, where the primary slot width τ _t1 refers to the center distance between the two magnetic conductive teeth 12 on the same side of the same H-type conductive magnetic core 7, and the secondary pole distance τ _ρ refers to the center-to-center distance between two adjacent secondary teeth 9 , the phase spacing ρ refers to the center-to-center distance between two adjacent permanent magnets 8 , and τ _t2 refers to the two adjacent magnetic permeability on both sides of the connection bridge 5 The center-to-center distance between the teeth 12.

In the linear motor, the motor pole distance τ _ρ is preferably 6mm, and the distance ρ is preferably 34mm; the length of a secondary pole distance is equivalent to 360 electrical degrees of the motor, that is, a secondary pole of the motor is equivalent to a permanent magnet synchronous motor. a pair of poles. According to the principle of fractional slots, if the number of primary slots is 6, the number of secondary poles can be selected as 1, 5, 7, 11, 13, 17, 19, 23... . In order to obtain a larger thrust density and a lower synchronous speed, the linear motor should adopt a multi-pole structure with few slots. The motor shown in Figure 1 is a 6-slot/17-pole motor. The working speed range is determined by the number of slots/poles and the pole pitch. The number of slots/poles and the secondary pole pitch of the motor can be selected according to actual requirements.

As shown in FIG. 1 , two concentrated windings are spaced between the permanent magnet 8 and the H-shaped conductive magnetic cores 7 on both sides in each unit, and only one of the magnetic conductive teeth of the H-shaped conductive magnetic core 7 of each unit is provided. Phase concentrated winding, any one-phase armature winding of the unilateral primary in each unit is composed of 2 pairs of concentrated armature windings 3 connected in series, starting from the first concentrated armature winding, there is an adjacent concentrated armature winding belong to the same phase, and then set the concentrated armature windings belonging to the adjacent phases in sequence, the two unilateral primary structures are exactly the same, 6 motor units are arranged in sequence, and the concentrated armature windings belonging to the same phase in the two unilateral primary are connected in parallel and independently controlled, or connected in series as one-phase winding control.

As shown in FIG. 1 , the permanent magnets 8 are magnetized horizontally, and the magnetization directions of the permanent magnets 8 corresponding to the adjacent primary mover units 4 are opposite, and the magnetization directions of the permanent magnets 8 corresponding to the primary mover units belonging to the same phase are opposite. The armature windings 14 in the winding installation slot are arranged in a certain phase sequence, wherein the winding direction of the armature winding in any winding installation slot is opposite to that of the adjacent armature winding, and the same-phase electric current of the same unit. The pivot windings are wound in opposite directions, and six continuous primary mover units 4 constitute a complete primary mover 2 .

Through finite element analysis, the magnetic flux density and the distribution of magnetic induction lines in the stator core and the mover core were observed, and it was found that some parts of the adjacent units were not important for the circulation of magnetic induction lines, and the primary iron core did not take advantage of this. Part, after removing these parts, by observing the magnetic field density distribution, as shown in Figure 4a, it is found that the magnetic flux density of the iron cores at both ends increases and does not reach magnetic saturation, so this part is removed to form the primary mover unitization of the present application Structure. As shown by the arrows of the primary and the black ellipse of the secondary in Fig. 4b, the unitized design makes the magnetic field lines flowing between the primary and the secondary denser, which greatly improves the thrust density of the motor, and also greatly reduces the motor's thrust. weight, reduce the manufacturing cost of the motor, and improve the utilization rate and operation efficiency of the motor material.

As shown in FIG. 7 , between the secondary teeth 9 of the secondary stator 1 are secondary slots 10 , and a first inclined edge 15 is formed between the secondary teeth 9 and the secondary slots 10 . Both sides of the secondary teeth 9 are provided with right-angle chamfering, and a second inclined edge 16 and a third inclined edge 17 are formed at the tip portions on both sides of the secondary teeth 9 . As shown in FIG. 6 , the two sides of the magnetic conductive teeth 12 of each of the H-shaped magnetic conductive cores 7 are provided with right-angle chamfering, and fourth inclined sides 18 and The fifth inclined edge 19 . As shown in FIG. 6 , one magnetic conductive tooth 12 on one side of the H-shaped magnetic conductive core 7 is dislocated from the corresponding secondary tooth 9 , and one magnetic conductive tooth on the other side of the H-shaped magnetic conductive core 7 12 is disposed opposite to its corresponding secondary tooth 9 . Further, when the magnetic conductive teeth 12 and the secondary teeth 9 are dislocated, the right end of the fourth oblique side 18 is directly opposite to the left end of the second oblique side 16 .

As shown in Figure 3a, the existing H-type iron core has serious magnetic flux leakage. The H-type conductive magnetic core of the new structure of the present application not only greatly reduces the problem of magnetic flux leakage, but also as shown in the area drawn by the black elliptical circle in Figure 3b, The optimization of the teeth of the new H-type conductive magnet core makes the magnetic resistance of the magnetic field lines smaller, and the magnetic flux of the magnetic field lines is more continuous, which is more in line with the principle of minimum magnetic resistance.

Also as shown in Figure 5b, the filling part of the secondary cogging also reflects this optimization principle. The sharp cogging in the model of Figure 5a is not suitable for the circulation of magnetic field lines, and it is accompanied by a small amount of magnetic flux leakage. The filling part of the tooth slot in Figure 5b solves this problem very well. Combined with the finite element analysis, the optimal side length of filling is 0.4mm.

As shown in Fig. 7, due to the design of the H-shaped magnetic conductive core 7 and the primary mover unit 4 of the new structure, the magnetic flux density is increased and the utilization rate of the magnetic conductive material is improved, so that the average torque can be guaranteed without affecting the average torque. On the premise that the secondary does not reach magnetic saturation when the motor is running, combined with the finite element simulation results, the thickness of the secondary yoke is appropriately reduced, which not only reduces the cost and weight of the secondary, but also improves the output power and load capacity of the motor. .

In order to reduce the positioning force, as shown in Figure 6, the bilateral stator distribution after one of the secondary displacements of the motor is asymmetric, so this method is defined as the asymmetric distribution of stator teeth. The optimized asymmetric distribution distance is d = τ _ρ /12 through the finite element method simulation calculation, the positioning force is reduced and the thrust fluctuation is reduced, while the back EMF and thrust can maintain good performance.

Since the flux-switching permanent magnet motor operates on the principle of minimum reluctance, the size of the permanent magnets is widened when the primary and secondary are close to each other (the upper and lower ends of the permanent magnets placed vertically), which increases the thrust density of the motor. , Combined with the finite element analysis, the middle part of the permanent magnet is less used, so the middle width of the permanent magnet should be appropriately reduced. Combined with the finite element analysis, to achieve the same thrust, the simulation results of the permanent magnet of this shape use less, and the positioning of the motor The force is greatly reduced, and the optimized permanent magnet model is shown in Figure 8.

In order to further reduce the positioning force of the motor and improve the stability of the motor operation, as shown in Figure 9, the technology of right-angle chamfered teeth and the finite element analysis are used to optimize the primary and secondary teeth. Torque is minimized to a fairly low level without sacrificing average torque. Limited by the size of the design parameters of the motor, the chamfer selection should be neither too large nor too small, as larger values may cause magnetic saturation, which in turn increases cogging torque, while smaller values are not effective. In order to achieve the minimum cogging torque, combined with the finite element prediction and simulation results, the optimal right angle size of the primary and secondary tooth design parameters is 0.5mm.

As shown in Figure 10, the unitized design not only increases the thrust density, reduces and reduces the weight and manufacturing cost of the motor, but also forms a primary air vent, which is connected to two adjacent primary units. The bridge forms the primary cooling and ventilation structure. The connecting bridge is a thermally conductive but non-magnetically conductive material, which is beneficial to the heat dissipation and cooling of the permanent magnet and the winding, and improves the output capability and service life of the motor.

Such a structure not only effectively reduces the use of permanent magnets and magnetic conductive materials, but also reduces the overall cost and weight of the motor, is also conducive to the heat dissipation of the permanent magnets, and improves the thrust output density and load capacity of the motor. Compared with the existing bilateral linear flux switching permanent magnet motor, the new structure has the characteristics of low motor loss, high thrust density and low normal pulling force, which effectively reduces the cost and weight of the motor and greatly solves the problem of system leakage. Improve the utilization rate of motor materials.

Claims (3)

1. A bilateral magnetic flux switching permanent magnet linear motor, characterized in that it comprises a bilateral secondary stator (1) and a primary mover (2) arranged between the stators, and the secondary stator (1) has a The length is greater than the length of the primary mover (2), there is a gap (3) between the primary mover (2) and the bilateral secondary stator, and the primary mover includes 6 primary mover units (4) ), a connecting bridge (5) exists between the primary mover unit (4) and the primary mover unit (4), and the connecting bridges (5) are filled and fastened between adjacent units, and the connecting bridges (5) A primary cooling ventilation structure (6) is formed of a thermally conductive but non-magnetically conductive material and is spaced apart from the unit; each primary mover unit (4) includes two H-shaped conductive cores (7), two H-shaped conductive cores ( 7) Permanent magnets (8) are arranged between; a plurality of secondary teeth (9) are formed at intervals on the secondary stator (1), and secondary slots are formed between the secondary teeth and the secondary teeth (10), a yoke (11) is formed at the bottom of the secondary slot (10), and a magnetic conductive tooth (12) is formed on the H-shaped magnetic conductive core (7) opposite to the secondary tooth (9). , a winding installation slot (13) is formed between the magnetic conductive teeth (12) on the same side; the winding installation of the permanent magnet (8) in each primary mover unit (4) and the H-shaped conductive magnetic core (7) on both sides An armature winding (14) is spaced between the slots (13), and only one-phase armature is arranged in the winding installation slot (13) of the H-shaped conductive magnet core (7) of each primary mover unit (4). A winding (14); the bilateral secondary stator is used as a fixed part, the primary mover (2) is used as a moving part, and the primary mover (2) performs linear motion in the middle of the bilateral secondary stator to form a motor with a bilateral flat plate structure; Secondary slots (10) are formed between the secondary teeth (9) of the secondary stator (1), and a first inclined edge is formed between the secondary teeth (9) and the secondary slots (10). (15), two sides of each secondary tooth (9) are provided with right-angle chamfering, and a second inclined edge (16) and a third inclined edge are formed on the tip portions of both sides of the secondary tooth (9) side(17); Right-angle chamfering is performed on both sides of the magnetic conductive teeth (12) of each of the H-shaped magnetic conductive cores (7), and fourth inclined edges (18) are formed on the tips of both sides of the magnetic conductive teeth (12). ) and the fifth inclined side (19); One magnetic conductive tooth (12) on one side of the H-shaped conductive magnetic core (7) is dislocated from the corresponding secondary tooth (9), and one magnetic conductive tooth (12) on the other side of the H-shaped conductive magnetic core (7) The magnetic teeth (12) are arranged opposite to their corresponding secondary teeth (9); When the magnetic conductive teeth (12) and the secondary teeth (9) are staggered, the right end of the fourth hypotenuse (18) and the left end of the second hypotenuse (16) are arranged directly opposite; The permanent magnets (8) are magnetized horizontally, and the magnetization directions of the permanent magnets (8) in the adjacent primary mover units (4) are opposite, and the permanent magnets ( 8) The magnetization direction is opposite; The primary slot width τ _t1 and the secondary pole pitch τ _ρ , and the phase spacing ρ and the secondary pole pitch τ _ρ are in accordance with the following formulas: τ _t1 =[(m+1/2)]τ _ρ , where m is 1; ρ=(n±2/3)τ _ρ , where n is an integer 5, and the distance between the three-phase windings is 120 electrical degrees. The tooth pitch between the primary units τ _t2 =(m+1/6)τ _ρ , where m is 1, and the primary slot width τ _t1 refers to the two on the same side of the same H-type magnetic core (7). The center-to-center distance between the magnetic conductive teeth (12), the secondary pole distance τ _ρ refers to the center-to-center distance between two adjacent secondary teeth (9), and the phase spacing ρ refers to the adjacent two permanent magnets (8). ) between the centers, τ _t2 is the center distance between the adjacent two magnetic conductive teeth (12) on both sides of the connection bridge (5); Starting from a certain winding installation slot (13), the armature windings (14) in the winding installation slot (13) are arranged in a certain phase sequence, wherein the armature windings (14) in any winding installation slot (13) are arranged in sequence. 14) The winding directions of the adjacent armature windings (14) are opposite, and the in-phase armature windings (14) of the same primary mover unit (4) are wound in opposite directions, and six consecutive primary mover units (4) Form a complete primary mover (9). 2 . The bilateral magnetic flux switching permanent magnet linear motor according to claim 1 , wherein the gap ( 3 ) is 1 mm. 3 . 3. The bilateral magnetic flux switching permanent magnet linear motor according to claim 1, characterized in that: any one-phase armature winding of the primary corresponding to each primary mover unit (4) is composed of a pair of concentrated armature windings (14). ), then the concentrated armature windings belonging to the adjacent phases are arranged in sequence, the 6 primary mover units are arranged in sequence, and the concentrated armature windings belonging to the same phase are controlled in parallel and individually, or connected in series as one-phase windings for control.

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