CN110957876B - Bilateral magnetic flux switching permanent magnet linear motor - Google Patents
Bilateral magnetic flux switching permanent magnet linear motor Download PDFInfo
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- CN110957876B CN110957876B CN201911233229.9A CN201911233229A CN110957876B CN 110957876 B CN110957876 B CN 110957876B CN 201911233229 A CN201911233229 A CN 201911233229A CN 110957876 B CN110957876 B CN 110957876B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/04—Machines with one rotor and two stators
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
- H02K41/033—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type with armature and magnets on one member, the other member being a flux distributor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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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
Technical Field
The invention relates to the technical field of motors, in particular to a bilateral magnetic flux switching permanent magnet linear motor.
Background
At present, with the development of industrial technology, the application of linear motors in the fields of rail transit, vertical lifting and the like is becoming a hot point of application technology more and more. The conventional rotating motor depending on the mechanical transmission device has low efficiency, and cannot meet the requirement of high-efficiency operation in various performance aspects. Therefore, the linear motor is adopted to replace the rotating motor, so that the defects of the rotating motor in the application occasions can be overcome, and the operation efficiency of the whole driving system is improved.
The long secondary of the existing bilateral magnetic flux switching permanent magnet linear motor is only made of a magnetic conductive material, and the primary is only made of an armature winding and a magnetic conductive material, so that the reliability is high, the structure is simple, and the permanent magnet linear motor is suitable for long-stroke working conditions. But still has the problems of serious magnetic leakage, low utilization rate of magnetic conductive materials, overhigh cost, small thrust density and the like, and limits the application of the magnetic flux in the fields of traffic tracks, vertical lifting and the like.
Disclosure of Invention
The invention aims to solve the technical problem of how to provide a bilateral magnetic flux switching permanent magnet linear motor with high utilization rate and low magnetic flux leakage.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a bilateral magnetic flux switches permanent magnet linear electric motor which characterized in that: the primary rotor comprises 6 primary rotor units, connecting bridges exist between the primary rotor units and the primary rotor units, adjacent units are filled and fastened by the connecting bridges, and the connecting bridges are heat-conducting but non-magnetic materials and form a primary cooling ventilation structure with the units at intervals; each primary rotor unit comprises two H-shaped magnetic conductive iron cores, and a permanent magnet is arranged between the two H-shaped magnetic conductive 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; an armature winding is sleeved between the permanent magnet in each primary rotor unit and the winding installation grooves of the H-shaped magnetic conduction iron cores on the two sides at intervals, and only one-phase armature winding is arranged in the winding installation groove of the H-shaped magnetic conduction iron core of each primary rotor unit; 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.
Preferably, the gap is 1 mm.
The further technical scheme is as follows: be the secondary groove between the secondary tooth of secondary stator, secondary tooth with be formed with first oblique edge between the secondary groove, every the right angle chamfer setting is carried out to the both sides of secondary tooth the point portion of secondary tooth both sides is formed with second oblique edge and third oblique edge.
The further technical scheme is as follows: every H type magnetic conduction iron core lead the both sides of magnetism tooth and carry out right angle chamfer setting lead the point portion of magnetism tooth both sides and be formed with fourth slope limit and fifth slope limit.
The further technical scheme is as follows: one magnetic conduction tooth on one side of the H-shaped magnetic conduction iron core is arranged in a staggered mode with the corresponding secondary tooth, and one magnetic conduction tooth on the other side of the H-shaped magnetic conduction iron core is arranged opposite to the corresponding secondary tooth.
The further technical scheme is as follows: when the magnetic conduction teeth and the secondary teeth are arranged in a staggered mode, the right end of the fourth bevel edge and the left end of the second bevel edge are arranged in an aligned mode.
The further technical scheme is as follows: primary slot width τt1From the secondary pole by a distance τρSpacing p and secondary pole pitch tauρThe following formula is satisfied:
τt1＝[(m+1/2)]τρwherein m is 1; ρ ═ n ± 2/3 τρWherein n is an integer of 5, and the distance meets the requirement of 120 electrical angles of mutual difference of three-phase windings; pitch τ between primary unitst2＝(m+1/6)τρWherein m is 1, wherein the primary slot width τt1Refers to the same on the same H-type magnetic conductive iron coreTwo side magnetic conduction teeth (center distance between them, secondary pole distance tau)ρThe center distance between two adjacent secondary teeth is defined, the phase distance rho is the center distance between two adjacent permanent magnets, and taut2Is the center distance between two adjacent magnetic conduction teeth on two sides of the connecting bridge.
The further technical scheme is as follows: the permanent magnets are horizontally magnetized, the magnetizing directions of the permanent magnets in the adjacent primary rotor units are opposite, and the magnetizing directions of the permanent magnets corresponding to the primary rotor units belonging to the same phase are opposite.
The further technical scheme is as follows: the armature windings in any winding installation groove are arranged in sequence according to a certain phase sequence, wherein the winding directions of the armature windings in any winding installation groove and the armature windings on one side adjacent to the armature windings are opposite, the winding directions of the same-phase armature windings of the same primary rotor unit are opposite, and 6 continuous primary rotor units form a complete primary rotor.
The further technical scheme is as follows: any primary armature winding corresponding to each primary rotor unit consists of 1 pair of concentrated armature windings, concentrated armature windings belonging to adjacent phases are sequentially arranged behind the concentrated armature windings, 6 primary rotor units are sequentially arranged, and the concentrated armature windings belonging to the same phase are connected in parallel and are independently controlled or are connected in series to be used as one-phase winding control.
Adopt the produced beneficial effect of above-mentioned technical scheme to lie in: the linear motor adopts the H-shaped magnetic conductive iron core, so that the problem of magnetic leakage of the primary rotor is effectively solved; the primary unitized design not only increases the magnetic flux density and the thrust density, but also greatly reduces the weight of the motor, reduces the manufacturing cost of the motor and improves the utilization rate of motor materials; the thickness of the yoke part of the secondary is reduced, the cost and the weight of the secondary are further reduced, and meanwhile, the output power and the load carrying capacity of the motor are improved; because the secondary structure is simple and only consists of a magnetic conduction material, the optimized filling tooth socket structure ensures that the magnetic flux of the secondary magnetic induction lines flows more continuously, thereby not only reducing the magnetic leakage, but also improving the output capability of the motor due to the operation which is more in line with the minimum magnetic resistance principle; according to the principle of the flux switching motor and finite element analysis, the shape of the permanent magnet is optimized, so that the thrust output density of the motor is effectively increased, the positioning force is effectively reduced, the running performance of the motor is improved, and meanwhile, the using amount of the permanent magnet is reduced, and the manufacturing cost of the motor is saved; by means of finite element analysis, the primary and secondary tooth profiles optimized by the square chamfering technology effectively reduce the positioning force, but the average torque of the motor is not reduced, so that the running performance of the motor is improved; the bilateral stators are asymmetrically distributed, so that the positioning force is effectively reduced; the connecting bridge between the adjacent primary rotor units is a heat-conducting non-magnetic-conducting material and forms a primary cooling ventilation structure with the ventilation opening, so that heat dissipation and cooling of the permanent magnet and the winding are facilitated, the output capacity of the motor is improved, the service life of the motor is prolonged, the utilization rate of materials is greatly improved, and the manufacturing cost of the motor is reduced.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of a linear motor according to an embodiment of the present invention;
FIG. 2 is a magnetic field profile of a linear motor according to an embodiment of the present invention;
FIG. 3a is a schematic diagram of the distribution of primary magnetic induction lines in the prior art;
fig. 3b is a schematic diagram of the distribution of primary magnetic induction lines in the linear motor according to the embodiment of the present invention;
FIG. 4a is a prior art magnetic field profile for a magnetically permeable core;
fig. 4b is a magnetic field distribution diagram of an H-shaped magnetically permeable core in a linear motor according to an embodiment of the present invention;
FIG. 5a is a prior art magnetic induction profile of a primary tooth and a secondary tooth;
FIG. 5b is a diagram of a secondarily optimized magnetic induction line distribution in a linear motor according to an embodiment of the present invention;
FIG. 6 is a schematic view illustrating the asymmetric distribution of stator teeth in a linear motor according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a stator in a linear motor according to an embodiment of the present invention;
fig. 8 is a schematic view of a matching structure of an H-shaped magnetically permeable iron core and a permanent magnet in a linear motor according to an embodiment of the present invention;
fig. 9 is a schematic structural view of primary and secondary teeth in a linear motor according to an embodiment of the present invention;
fig. 10 is a schematic view of a connection bridge and a ventilation structure in a linear motor according to an embodiment of the present invention;
wherein: 1. a secondary stator; 2. a primary mover; 3. a gap; 4. a primary mover unit; 5. a connecting bridge; 6. a cooling ventilation structure; 7. an H-shaped magnetically permeable core; 8. a permanent magnet; 9. a secondary tooth; 10. a secondary tank; 11. a yoke portion; 12. magnetic conduction teeth; 13. a winding mounting groove; 14. an armature winding; 15. a first inclined edge; 16. a second inclined edge; 17. a third inclined edge; 18. a fourth inclined edge; 19. a fifth inclined edge.
Detailed Description
The technical solutions in the embodiments of the present invention are 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.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention, and therefore the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1-2, an embodiment of the present invention discloses a bilateral magnetic flux switching permanent magnet linear motor, including a bilateral secondary stator 1 and a primary mover 2 disposed between the stators, where a length of the secondary stator 1 is greater than a length of the primary mover 2, and a gap 3 is provided between the primary mover 2 and the bilateral secondary stator, preferably, the gap is 1 mm; the primary rotor comprises 6 primary rotor units 4, connecting bridges 5 are arranged between the primary rotor units 4 and the primary rotor units 4, adjacent units are filled and fastened by the connecting bridges 5, and the connecting bridges 5 are heat-conducting but non-magnetic-conducting materials and form a primary cooling ventilation structure 6 with the units at intervals; each primary rotor unit 4 comprises two H-shaped magnetic conductive iron cores 7, and a permanent magnet 8 is arranged between the two H-shaped magnetic conductive iron cores 7; a plurality of secondary teeth 9 are formed on the secondary stator 1 at intervals, a secondary slot 10 is formed between each secondary tooth and each secondary tooth, a yoke part 11 is formed at the bottom of each secondary slot 10, a magnetic conductive tooth 12 is formed on the H-shaped magnetic conductive iron core 7 opposite to each secondary tooth 9, and a winding installation slot 13 is formed between the magnetic conductive teeth 12 on the same side; an armature winding 14 is sleeved between the permanent magnet 8 in each primary rotor unit 4 and the winding mounting grooves 13 of the H-shaped magnetic conductive iron cores 7 on the two sides at intervals, and only one-phase armature winding 14 is arranged in the winding mounting groove 13 of the H-shaped magnetic conductive iron core 7 of each primary rotor unit 4; the bilateral secondary stator is used as a fixed part, the primary rotor 2 is used as a moving part, and the primary rotor 2 makes linear motion in the middle of the bilateral secondary stator to form the motor with the bilateral flat plate structure.
As shown in FIG. 1, the primary slot width τt1From the secondary pole by a distance τρPhase spacing rho and secondary pole pitch tauρThe following requirements are met: tau ist1＝[(m+1/2)]τρWherein m is 1; ρ ═ n ± 2/3 τρWherein n is an integer, and the distance satisfies the requirement of 120 electrical angles of mutual difference of three-phase windings; pitch τ between primary unitst2＝(m+1/6)τρWherein m is 1, wherein the primary slot width τt1Refers to the center distance between two magnetic conduction teeth 12 on the same side of the same H-shaped magnetic conduction iron core 7 and the secondary pole distance tauρRefers to the center distance between two adjacent secondary teeth 9, the phase distance rho refers to the center distance between two adjacent permanent magnets 8, taut2The center distance between two adjacent magnetic conduction teeth 12 on two sides of the connecting bridge 5 is referred to.
The pole pitch tau of the linear motorρPreferably 6mm, and p is preferably 34 mm; the length of one secondary pole pitch corresponds to 360 electrical degrees of the motor, i.e. one secondary pole of the motor corresponds to one pair of poles of a permanent magnet synchronous motor. According to the fractional slot principle, if the number of primary slots is 6, the number of secondary poles can be selected to be 15, 7, 11, 13, 17, 19, 23 … …. In order to obtain larger thrust density and lower synchronous speed, the linear motor adopts a few-slot multi-pole structure, and 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 distance, and the number of slots/poles and the pole distance of the secondary stage of the motor can be selected according to actual requirements.
As shown in fig. 1, two concentrated windings are respectively sleeved between the permanent magnet 8 and the H-shaped magnetic conductive iron cores 7 at two sides in each unit at intervals, only one-phase concentrated winding is arranged in the magnetic conductive teeth of the H-shaped magnetic conductive iron core 7 of each unit, any one-phase armature winding of the single-side primary in each unit is formed by connecting 2 pairs of concentrated armature windings 3 in series, from the first concentrated armature winding, 1 concentrated armature winding which is adjacently arranged belongs to the same phase, then the concentrated armature windings which belong to the adjacent phases are sequentially arranged, the two single-side primary structures are completely the same, 6 motor units are sequentially arranged, the concentrated armature windings which belong to the same phase in the two single-side primary windings are independently controlled in parallel, or are connected in series to be used as one-phase winding control.
As shown in fig. 1, the permanent magnets 8 are horizontally magnetized, the magnetizing directions of the permanent magnets 8 corresponding to the adjacent primary mover units 4 are opposite, and the magnetizing 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 mounting grooves are sequentially arranged according to a certain phase sequence, wherein the winding directions of the armature winding in any winding mounting groove and the armature winding on one side adjacent to the armature winding are opposite, the winding directions of the same-phase armature windings in the same unit are opposite, and 6 continuous primary rotor units 4 form a complete primary rotor 2.
Through finite element analysis, magnetic flux density and distribution of magnetic induction lines in a stator core and a rotor core are observed, some parts of adjacent units are not important for circulation of the magnetic induction lines, the parts are not utilized by a primary core, and after the parts are removed, a magnetic field density distribution diagram is observed, as shown in fig. 4a, the fact that the magnetic flux density of the cores at two ends is increased and does not reach magnetic saturation is found, so that the parts are removed, and the primary rotor unitized structure is formed. As shown by the black ellipses of the primary and the secondary in fig. 4b, the unitized design makes the magnetic induction lines which circulate between the primary and the secondary more dense, greatly improves the thrust density of the motor, greatly lightens the weight of the motor, reduces the manufacturing cost of the motor, and improves the utilization rate and the operating efficiency of the motor material.
As shown in fig. 7, a secondary slot 10 is formed between the secondary teeth 9 of the secondary stator 1, a first inclined edge 15 is formed between the secondary teeth 9 and the secondary slot 10, both sides of each secondary tooth 9 are chamfered at right angles, and a second inclined edge 16 and a third inclined edge 17 are formed at the tip portions of both sides of the secondary tooth 9. As shown in fig. 6, two sides of the magnetic conductive tooth 12 of each H-shaped magnetic conductive iron core 7 are provided with right-angled chamfers, and a fourth inclined edge 18 and a fifth inclined edge 19 are formed at the tip parts of the two sides of the magnetic conductive tooth 12. As shown in fig. 6, one magnetic conductive tooth 12 on one side of the H-shaped magnetic conductive iron core 7 is disposed in a staggered manner with the corresponding secondary tooth 9, and one magnetic conductive tooth 12 on the other side of the H-shaped magnetic conductive iron core 7 is disposed opposite to the corresponding secondary tooth 9. Further, when the magnetic conduction teeth 12 and the secondary teeth 9 are arranged in a staggered manner, the right end of the fourth bevel edge 18 is arranged in right alignment with the left end of the second bevel edge 16.
As shown in fig. 3a, current H type iron core magnetic leakage is serious, the problem of magnetic leakage that has not only greatly reduced of the H type magnetic conduction iron core of the novel structure of this application, simultaneously as shown in the region that figure 3b black oval circle is drawn, the optimization of novel H type magnetic conduction iron core tooth portion makes the magnetic resistance of magnetic induction line circulation diminish, and the magnetic flux circulation of magnetic induction line is more continuous, more accords with and embodies the minimum principle of magnetic resistance.
Also as shown in fig. 5b, the filling part of the secondary gullets also embodies the optimization principle, the sharp gullets in the model of fig. 5a are not suitable for the circulation of the magnetic induction lines and are accompanied by the occurrence of a small amount of leakage flux, while the filling part of the gullets of fig. 5b well solves the problem, and the optimal side length of the filling part is 0.4mm in combination with finite element analysis.
As shown in fig. 7, due to the design of the H-shaped magnetically conductive iron core 7 and the primary rotor unit 4 with the novel structure, the magnetic flux density is increased, and the utilization rate of the magnetically conductive material is improved, so that the thickness of the yoke part of the secondary stage is properly reduced by combining a finite element simulation result on the premise that the average torque is not influenced and the magnetic saturation of the secondary stage is not reached when the motor operates, which not only reduces the cost and weight of the secondary stage, but also improves the output power and the load carrying capacity of the motor.
To reduce cogging forces, the double-sided stator profile of the machine after one of the secondary displacements is asymmetric, as shown in fig. 6, and this approach is therefore defined as an asymmetric distribution of stator teeth. Obtaining the optimized asymmetric distribution distance d tau through finite element method simulation calculationρAnd 12, the positioning force is reduced, and the back electromotive force and the thrust force can keep good performance while the thrust fluctuation is reduced.
Because the flux switching permanent magnet motor operates on the principle of minimum magnetic resistance, the size of the permanent magnet is widened at the position where the primary and the secondary are close to each other (the upper end and the lower end of the vertically arranged permanent magnet), the thrust density of the motor is increased, the middle part of the permanent magnet is less in utilization by combining finite element analysis, so that the middle width of the permanent magnet is properly reduced, the simulation result consumption of the permanent magnet in the shape is less by combining the finite element analysis under the condition of achieving the same thrust, the positioning force of the motor is greatly reduced, and the optimized permanent magnet model is as shown in fig. 8.
To further reduce the cogging force of the motor and improve the stability of the motor operation, while optimizing the primary and secondary teeth using the right angle chamfer technique in combination with finite element analysis as shown in fig. 9, the method can minimize the cogging torque to a relatively low level without sacrificing the average torque. The chamfer selection is neither too large nor too small, subject to the design parameter dimensions of the motor, since larger values may lead to magnetic saturation, which in turn increases cogging torque, while smaller values are not effective for the purpose of minimizing cogging torque, combined with finite element predictions and simulations, to obtain the optimum right angle dimension of the primary and secondary tooth design parameters of 0.5 mm.
As shown in fig. 10, the unitized design not only increases the thrust density, reduces the weight and manufacturing cost of the motor, but also forms a primary ventilation opening, and a connecting bridge exists between two adjacent primary units to form a primary cooling ventilation structure. The connecting bridge is a heat-conducting but non-magnetic-conducting material, so that heat dissipation and cooling of the permanent magnet and the winding are facilitated, the output capacity of the motor is improved, and the service life of the motor is prolonged.
The structure not only effectively reduces the use of the permanent magnet and the magnetic material, but also reduces the overall cost and the weight of the motor, is favorable for the heat dissipation of the permanent magnet, and improves the thrust output density and the load carrying capacity of the motor. Compared with the existing bilateral linear magnetic flux switching permanent magnet motor, the novel structure has the characteristics of small motor loss, small thrust density and high normal tension, and the like, effectively reduces the motor cost and weight, and greatly improves the utilization rate of motor materials under the condition of solving the system magnetic flux leakage.
Claims (3)
1. The utility model provides a bilateral magnetic flux switches permanent magnet linear electric motor which characterized in that: the rotor comprises bilateral secondary stators (1) and a primary rotor (2) arranged between the stators, wherein the length of the secondary stators (1) is greater than that of the primary rotor (2), a gap (3) is reserved between the primary rotor (2) and the bilateral secondary stators, the primary rotor comprises 6 primary rotor units (4), a connecting bridge (5) is arranged between each primary rotor unit (4) and each primary rotor unit (4), adjacent units are filled and fastened by the connecting bridges (5), and the connecting bridges (5) are heat-conducting magnetic materials but non-magnetic materials and form a primary cooling and ventilating structure (6) with unit intervals; each primary rotor unit (4) comprises two H-shaped magnetic cores (7), and a permanent magnet (8) is arranged between the two H-shaped magnetic cores (7); a plurality of secondary teeth (9) are formed on the secondary stator (1) at intervals, secondary slots (10) are formed between the secondary teeth, yoke parts (11) are formed at the bottoms of the secondary slots (10), magnetic guide teeth (12) are formed on the H-shaped magnetic guide iron core (7) opposite to the secondary teeth (9), and winding mounting grooves (13) are formed between the magnetic guide teeth (12) on the same side; an armature winding (14) is sleeved at a distance between a permanent magnet (8) in each primary rotor unit (4) and winding installation grooves (13) of H-shaped magnetic cores (7) on two sides, and only one-phase armature winding (14) is arranged in the winding installation groove (13) of the H-shaped magnetic core (7) of each primary rotor unit (4); the bilateral secondary stator is taken as a fixed part, the primary rotor (2) is taken as a moving part, and the primary rotor (2) makes linear motion in the middle of the bilateral secondary stator to form a motor with a bilateral flat plate structure;
secondary grooves (10) are formed between secondary teeth (9) of the secondary stator (1), a first inclined edge (15) is formed between each secondary tooth (9) and each secondary groove (10), two sides of each secondary tooth (9) are subjected to right-angle chamfering, and tip parts of two sides of each secondary tooth (9) are provided with a second inclined edge (16) and a third inclined edge (17);
right-angle chamfering is carried out on two sides of a magnetic conduction tooth (12) of each H-shaped magnetic conduction iron core (7), and a fourth inclined edge (18) and a fifth inclined edge (19) are formed at the tip parts of the two sides of the magnetic conduction tooth (12);
one magnetic conduction tooth (12) on one side of the H-shaped magnetic conduction iron core (7) is arranged in a staggered mode with the corresponding secondary tooth (9), and one magnetic conduction tooth (12) on the other side of the H-shaped magnetic conduction iron core (7) is arranged opposite to the corresponding secondary tooth (9);
when the magnetic conduction teeth (12) and the secondary teeth (9) are arranged in a staggered manner, the right end of the fourth bevel edge (18) and the left end of the second bevel edge (16) are arranged in an aligned manner;
the permanent magnets (8) are horizontally magnetized, the magnetizing directions of the permanent magnets (8) in the adjacent primary rotor units (4) are opposite, and the magnetizing directions of the permanent magnets (8) corresponding to the primary rotor units (4) belonging to the same phase are opposite;
primary slot width τt1From the secondary pole by a distance τρPhase spacing rho and secondary pole pitch tauρThe following formula is satisfied:
τt1＝[(m+1/2)]τρwherein m is 1; ρ ═ n ± 2/3 τρWherein n is an integer of 5, and the distance meets the requirement of 120 electrical angles of mutual difference of three-phase windings; pitch τ between primary unitst2＝(m+1/6)τρWherein m is 1, wherein the primary slot width τt1Refers to the center distance between two magnetic conduction teeth (12) on the same side of the same H-shaped magnetic conduction iron core (7), and the secondary pole distance tauρThe center distance between two adjacent secondary teeth (9), the phase distance rho between two adjacent permanent magnets (8), taut2Is the center distance between two adjacent magnetic conduction teeth (12) at the two sides of the connecting bridge (5);
the armature windings (14) in the winding mounting grooves (13) are sequentially arranged according to a certain phase sequence from one winding mounting groove (13), wherein the winding directions of the armature windings (14) in any winding mounting groove (13) and the armature windings (14) on one adjacent side are opposite, the winding directions of the armature windings (14) in the same phase of the same primary rotor unit (4) are opposite, and 6 continuous primary rotor units (4) form a complete primary rotor (9).
2. The double-sided flux switching permanent magnet linear motor of claim 1, wherein: the gap (3) is 1 mm.
3. The double-sided flux switching permanent magnet linear motor of claim 1, wherein: any primary armature winding of any phase corresponding to each primary rotor unit (4) is composed of 1 pair of concentrated armature windings (14), concentrated armature windings belonging to adjacent phases are sequentially arranged behind the concentrated armature windings, 6 primary rotor units are sequentially arranged, and the concentrated armature windings belonging to the same phase are connected in parallel and are independently controlled or are connected in series to be controlled as a phase winding.
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| CN111509946B (en) * | 2020-05-14 | 2022-12-30 | 石家庄铁道大学 | Low-positioning-force bilateral magnetic flux switching permanent magnet linear motor |
| CN112260425B (en) * | 2020-11-05 | 2024-06-04 | 厦门钨业股份有限公司 | Linear flat motor stator, linear flat motor, linear cylinder motor stator and linear cylinder motor |
| TWI766696B (en) * | 2021-05-24 | 2022-06-01 | 張力 | Magnetic energy device pole change control mechanism |
| CN113629973B (en) * | 2021-08-30 | 2022-05-17 | 石家庄铁道大学 | Built-in hybrid excitation bilateral magnetic channel linear motor |
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