CN113300565A - Mover lightweight high-thrust-density transverse flux permanent magnet synchronous linear motor - Google Patents
Mover lightweight high-thrust-density transverse flux permanent magnet synchronous linear motor Download PDFInfo
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- CN113300565A CN113300565A CN202110656564.0A CN202110656564A CN113300565A CN 113300565 A CN113300565 A CN 113300565A CN 202110656564 A CN202110656564 A CN 202110656564A CN 113300565 A CN113300565 A CN 113300565A
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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
Abstract
The invention discloses a rotor lightweight high-thrust-density transverse flux permanent magnet synchronous linear motor, belongs to the field of permanent magnet motors, and aims to solve the problems of low power factor and high rotor mass of the conventional transverse flux permanent magnet synchronous linear motor. The invention comprises an outer primary, an inner primary and a secondary, wherein the secondary is arranged between the outer primary and the inner primary; the outer primary comprises an outer primary armature, the outer primary armature is m phases, each phase comprises k outer armature units, and the k outer armature units are uniformly distributed in the circumferential direction in a phase range; the windings in the k outer armature units can form a phase winding by series connection or parallel connection; each outer armature unit is composed of h outer U-shaped armature modules which are evenly distributed along the axial direction, the windings of the adjacent outer U-shaped armature modules 3 are connected in series in an opposite mode, the central axial distance is tau, the inner primary comprises an inner primary armature, the structure of the inner primary is similar to that of the outer primary armature, and the radial positions of the k outer armature units and the radial positions of the k inner armature units are in one-to-one correspondence respectively.
Description
Technical Field
The invention relates to a permanent magnet linear motor, in particular to a transverse flux permanent magnet synchronous linear motor.
Background
The linear motor does not need intermediate transmission mechanisms such as a crankshaft connecting rod and the like, directly forms linear motion, has the advantages of simple structure, high precision, high transmission efficiency and the like, and is more and more concerned in the field of linear motion. The transverse flux permanent magnet synchronous linear motor is different from the traditional permanent magnet synchronous linear motor in magnetic circuit structure, the armature winding plane of the transverse flux permanent magnet synchronous linear motor is perpendicular to the motor motion plane, decoupling of electric load and magnetic load is achieved, and the thrust density of the motor can be improved by improving the magnetic energy change rate within a certain range.
One of the main problems of the conventional transverse flux permanent magnet synchronous linear motor is the low power factor of the motor, which may cause the increase of the driving current, the controller capacity, the loss and the like of the motor, thereby limiting the practical application of the motor. The reason that the power factor of the traditional transverse flux permanent magnet synchronous linear motor is low is that: on one hand, the utilization rate of the permanent magnet in the motor is low, the utilization rate of the permanent magnet of the traditional transverse flux permanent magnet synchronous linear motor is at most 50% under an ideal condition, and meanwhile, the magnetic leakage among the permanent magnets is very serious; on the other hand, the conventional transverse flux permanent magnet synchronous linear motor generally adopts a concentrated armature winding for each phase, and surrounds all the iron core units, which causes serious magnetic leakage of the armature winding. Therefore, how to improve the utilization rate of the permanent magnet of the flux permanent magnet synchronous linear motor and reduce the leakage flux of the permanent magnet and the armature of the motor is very important for improving the power factor of the transverse flux permanent magnet synchronous linear motor.
Another major problem of the conventional transverse flux permanent magnet synchronous linear motor is that the rotor has too large mass, which results in poor dynamic response capability of the motor. Particularly for servo systems and reciprocating motion systems, the mass of the rotor directly determines the comprehensive performance of the motor.
Disclosure of Invention
The invention provides a transverse flux permanent magnet synchronous linear motor with a high thrust density, which aims to solve the problems of low power factor and high rotor mass of the traditional transverse flux permanent magnet synchronous linear motor.
The rotor light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor comprises an outer primary, an inner primary and a secondary, wherein the secondary is arranged between the outer primary and the inner primary;
the outer primary comprises an outer primary armature 1, the outer primary armature 1 is m-phase, each phase comprises k outer armature units 2, and the k outer armature units 2 are uniformly distributed in the circumferential direction in a phase range; the windings in the k outer armature units 2 can form a phase winding by being connected in series or in parallel; each outer armature unit 2 is composed of h outer U-shaped armature modules 3 which are uniformly distributed along the axial direction, windings of the adjacent outer U-shaped armature modules 3 are connected in series in an opposite direction, the axial distance between the centers of the adjacent outer U-shaped armature modules 3 is tau, and the tau is the polar distance of the permanent magnet in the axial direction;
the inner primary comprises an inner primary armature 4, the inner primary armature 4 is m phases, each phase comprises k inner armature units 5, and the k inner armature units 5 are uniformly distributed in the circumferential direction in a phase range; the windings in the k inner armature units 5 can form a phase winding by being connected in series or in parallel; each inner armature unit 5 is composed of h inner U-shaped armature modules 6 which are uniformly distributed along the axial direction, the windings of the adjacent inner U-shaped armature modules 6 are connected in series in an opposite direction, and the axial distance between the centers of the adjacent inner U-shaped armature modules 6 is tau;
the radial positions of the k outer armature elements 2 and the k inner armature elements 5 are respectively in one-to-one correspondence.
Preferably, k outer armature units 2 in phase are uniformly distributed in the circumferential direction and occupy 360 °/m angle each time, and k armature units 5 in phase are uniformly distributed in the circumferential direction and occupy 360 °/m angle each time.
Preferably, the k outer armature units 2 in phase are arranged continuously in the circumferential direction and occupy 360 °/m angle each time, and the k inner armature units 5 in phase are arranged continuously in the circumferential direction and occupy 360 °/m angle each time.
Preferably, the outer U-shaped armature module 3 and the inner U-shaped armature module 6 have the same structure, and the outer U-shaped armature module 3 includes a U-shaped iron core 3-1 and winding coils wound on 2U-shaped iron core teeth, which are a first winding coil 3-2 and a second winding coil 3-3, respectively; the first winding coil 3-2 and the second winding coil 3-3 satisfy the following relationship: if the winding directions of the first winding coil 3-2 and the second winding coil 3-3 on the U-shaped iron core teeth are the same, the first winding coil and the second winding coil are connected in series in an opposite direction; if the winding directions of the first winding coil 3-2 and the second winding coil 3-3 on the U-shaped iron core teeth are opposite, the first winding coil and the second winding coil are connected in series in the positive direction.
Preferably, the U-shaped iron core 3-1 is further provided with a magnetic pole gathering shoe 3-4, the magnetic pole gathering shoe is of a boss structure extending along the peripheral direction, and the extending distance does not exceed the area corresponding to the permanent magnet in the lower secondary of the same pole.
Preferably, m × k outer U-shaped armature modules 3 located on the same circumference are independent of each other, and a gap is provided between two adjacent outer U-shaped armature modules 3; or m × k outer U-shaped armature modules 3 positioned on the same circumference, are connected to form an integrated primary core module.
Preferably, the secondary comprises a secondary permanent magnet 7 and a secondary support 8, the secondary support 8 being intended to support the secondary permanent magnet 7 arranged as an array of permanent magnets;
the secondary permanent magnet 7 is averagely divided into m areas along the circumferential direction, and the m areas correspond to the m-phase stator armatures in the primary part respectively; the permanent magnets in each area are arranged in the same way, and the permanent magnets of adjacent phases are staggered by 360 degrees/m degrees along the axial direction; each phase of permanent magnet comprises k permanent magnet groups 7-1, each permanent magnet group 7-1 is composed of j permanent magnets with the same N pole and j S poles, j is not less than h, the magnetizing directions of all adjacent permanent magnets are opposite, and the adjacent permanent magnet groups 7-1 are arranged in the same or reverse symmetry; the magnetizing direction of the secondary permanent magnet 7 is radial magnetizing or parallel magnetizing.
Preferably, the secondary comprises a secondary permanent magnet 7 and a secondary support 8, the secondary support 8 being intended to support the secondary permanent magnet 7 arranged as an array of permanent magnets;
the secondary permanent magnet 7 is a permanent magnet array fixed on the secondary support member 8, the secondary permanent magnet 7 is averagely divided into 2k areas along the circumferential direction, and the areas correspond to the outer U-shaped armature modules 3 in the outer primary and the inner U-shaped armature modules 6 in the inner primary respectively one by one; each phase of permanent magnet comprises k permanent magnet groups 7-1, each permanent magnet group 7-1 is formed by arranging j permanent magnets with the same N pole and j S poles in parallel along the axial direction, j is larger than m multiplied by h, the magnetizing directions of all adjacent permanent magnets are opposite, and the adjacent permanent magnet groups 7-1 in the same phase are arranged in the same or in reverse symmetry.
Preferably, the secondary support 8 includes two end rings disposed at both ends in the axial direction of the secondary permanent magnet 7, and a plurality of inter-pole supports disposed between two circumferentially adjacent permanent magnets.
According to the second scheme, the rotor light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor comprises an outer primary, an inner primary and a secondary, wherein the secondary is arranged between the outer primary and the inner primary;
the outer primary comprises an outer primary armature 1, the outer primary armature 1 is m phases, all the phases are uniformly distributed along the axial direction and are sequentially spaced by 2i tau +/-2 tau/m, i is 0,1,2 and …; each phase comprises k outer armature units 2, and the k outer armature units 2 are uniformly distributed along the circumferential direction; the windings in the k outer armature units 2 form a phase winding by series connection or parallel connection; each outer armature unit 2 is composed of h outer U-shaped armature modules 3 which are uniformly distributed along the axial direction, windings of the adjacent outer U-shaped armature modules 3 are connected in series in an opposite direction, the axial distance of the centers of the adjacent outer U-shaped armature modules 3 in each phase is tau, and the tau is the polar distance of the permanent magnet in the axial direction;
the inner primary comprises an inner primary armature 4, the inner primary armature 4 is m phases, all the phases are uniformly distributed along the axial direction and are sequentially spaced by 2i tau +/-2 tau/m, i is 0,1,2 and …; each phase comprises k inner armature units 5, and the k inner armature units 5 are uniformly distributed in the circumferential direction in a phase range; the windings in the k inner armature units 5 can form a phase winding by being connected in series or in parallel; each inner armature unit 5 is composed of h inner U-shaped armature modules 6 which are uniformly distributed along the axial direction, the windings of the adjacent inner U-shaped armature modules 6 are connected in series in an opposite direction, and the axial distance between the centers of the adjacent inner U-shaped armature modules 6 is tau.
The invention has the beneficial effects that:
(1) each permanent magnet in the motor corresponds to the U-shaped iron core, so that the utilization rate of the permanent magnet in the motor is obviously higher than that of the traditional transverse flux motor, and under an ideal condition, the utilization rate of the permanent magnet in the transverse flux motor is 100%, so that the power factor of the transverse flux motor can be greatly improved.
(2) Each phase of winding in the motor is formed by connecting a plurality of independent winding coils in series or in parallel, and each independent winding coil is wound on the U-shaped iron core, so that the winding leakage flux is greatly reduced compared with the traditional transverse flux motor, and the power factor of the transverse flux motor is obviously improved.
(4) The magnetic-gathering pole shoe of the primary U-shaped iron core is of a boss structure extending along the peripheral direction, and the magnetic fluxes of the permanent magnets covered by the pole shoe can be gathered to the tooth part of the iron core, so that the utilization rate of the permanent magnets is greatly improved. Meanwhile, the winding coil surrounding the U-shaped iron core is an effective side in the process of converting the mechanical energy and the electrical energy, so that the armature magnetic leakage is effectively reduced and the utilization rate of the armature winding is improved compared with the traditional transverse linear motor.
(5) The primary U-shaped iron core can effectively reduce the quality of the motor under the condition of not influencing the performance of the motor, and is beneficial to improving the power-weight ratio of the motor.
(6) The transverse flux cylindrical permanent magnet linear synchronous motor adopts a modular design, all phases are independent, the inter-phase electromagnetic coupling is reduced, one phase winding fails and does not interfere with other phases, the fault tolerance of the motor is improved, mutual inductance does not exist among all phases of the motor, and the control precision of the motor can be improved;
(7) the motor improves the utilization rate of the armature winding and the permanent magnet, and effectively reduces the armature magnetic leakage and the permanent magnet magnetic leakage, thereby greatly improving the power factor of the motor and solving the inherent problem of low power factor of a transverse linear motor.
(8) The secondary rotor of the motor is only supported by the permanent magnet and a necessary structure, the quality of the secondary rotor is effectively reduced, the rotor of the linear motor is lightened, and the dynamic response speed of the motor is greatly improved finally.
(9) The motor adopts a double-primary armature structure, and the output thrust and the thrust density of the motor can be greatly improved under the same volume.
Drawings
Fig. 1 is a schematic structural view of a rotor lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a first embodiment;
fig. 2 is a plan view of a secondary permanent magnet of a rotor of a lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a first embodiment;
FIG. 3 is a cross-sectional view A-A of FIG. 1;
FIG. 4 is a cross-sectional view B-B of FIG. 1;
fig. 5 is a main magnetic circuit schematic diagram of a cross-sectional view of a rotor of a light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor at a time a-a of t + τ/v according to a first embodiment;
FIG. 6 is a schematic main magnetic circuit diagram of a cross-sectional view of a rotor of a lightweight high thrust density transverse flux permanent magnet synchronous linear motor at time B-B + T/v according to a first embodiment;
fig. 7 is a schematic structural view of a rotor lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a second embodiment;
fig. 8 is a plan view of a secondary permanent magnet of a mover lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a second embodiment;
FIG. 9 is a cross-sectional view C-C of FIG. 7;
fig. 10 is a structural schematic view of a rotor lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a third embodiment;
FIG. 11 is a cross-sectional view D-D of FIG. 10;
fig. 12 is a schematic structural view of a rotor lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a fourth embodiment;
FIG. 13 is a cross-sectional view E-E of FIG. 12;
fig. 14 is a schematic structural view of a rotor lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a fifth embodiment.
Fig. 15 is a plan view of a secondary permanent magnet of a mover lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a fifth embodiment.
FIG. 16 is a sectional view taken along line F-F of FIG. 14
Fig. 17 is a schematic structural view of a mover lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to a sixth embodiment.
Fig. 18 is a sectional view taken along line G-G of fig. 17.
Detailed Description
The present invention will be further described with reference to fig. 1 to 18.
The first embodiment is as follows: the present embodiment will be described with reference to fig. 1 to 6.
Fig. 1 is a schematic structural diagram of a novel transverse flux permanent magnet synchronous linear motor with a lighter mover in a first embodiment.
The invention provides a rotor lightweight novel transverse flux permanent magnet synchronous linear motor, which comprises an outer primary armature 1, an inner primary armature 4, a secondary permanent magnet 7 and a secondary support member 8. The motor of the embodiment is a structure with a primary pole stator and a secondary rotor
The outer primary armature 1 is m phases, and each phase is uniformly distributed along the circumferential direction and sequentially occupies an angle of 360 degrees/m; each phase comprises k outer armature units 2, and the k outer armature units 2 are uniformly distributed in the circumferential direction in a phase range; the windings in the k outer armature units 2 can form a phase winding by being connected in series or in parallel; each outer armature unit 2 is composed of h outer U-shaped armature modules 3 which are uniformly distributed along the axial direction, the windings of the adjacent outer U-shaped armature modules 3 are connected in series in an opposite direction, and the axial distance between the centers of the adjacent outer U-shaped armature modules 3 is tau.
The outer U-shaped armature module 3 comprises a U-shaped iron core 3-1 and winding coils wound on 2U-shaped iron core teeth, namely a first winding coil 3-2 and a second winding coil 3-3; the first winding coil 3-2 and the second winding coil 3-3 satisfy the following relationship: if the winding directions of the first winding coil 3-2 and the second winding coil 3-3 on the U-shaped iron core teeth are the same, the first winding coil and the second winding coil are connected in series in an opposite direction; if the winding directions of the first winding coil 3-2 and the second winding coil 3-3 on the U-shaped iron core teeth are opposite, the first winding coil and the second winding coil are connected in series in the positive direction.
In order to increase the magnetic concentration effect of the outer U-shaped armature module 3, a magnetic concentration pole shoe 3-4 is arranged on each outer U-shaped iron core 3-1, the magnetic concentration pole shoe is of a boss structure extending along the peripheral direction, and the extending distance does not exceed the area corresponding to the permanent magnet under the same pole.
The inner primary armature 4 is m phases, and each phase is uniformly distributed along the circumferential direction and sequentially occupies an angle of 360 degrees/m; each phase comprises k inner armature units 5, and the k inner armature units 5 are uniformly distributed in the circumferential direction in a phase range; the windings in the k inner armature units 5 can form a phase winding by being connected in series or in parallel; each inner armature unit 5 is composed of h inner U-shaped armature modules 6 which are uniformly distributed along the axial direction, the windings of the adjacent inner U-shaped armature modules 6 are connected in series in an opposite direction, and the axial distance between the centers of the adjacent inner U-shaped armature modules 6 is tau. The structure of the inner U-shaped armature module 6 is the same as that of the outer U-shaped armature module 3, and the additionally arranged pole shoe also extends to the direction of the secondary pole.
The U-shaped armature modules of the most basic unit in the same area corresponding to the outer primary armature and the inner primary armature are in series connection on a magnetic circuit.
The m × k outer U-shaped armature modules 3 located on the same circumference are independent of each other, and a gap is provided between two adjacent outer U-shaped armature modules 3.
The rotor lightweight secondary of the novel transverse flux permanent magnet synchronous linear motor comprises a secondary permanent magnet 7 and a secondary support member 8, and is arranged between an outer primary armature 1 and an inner primary armature 4. The secondary permanent magnet 7 is a surface-mounted permanent magnet array which is magnetized in a radial direction or in parallel and is fixed on a secondary support 8. The secondary permanent magnet 7 is averagely divided into m areas along the circumferential direction, and the m areas correspond to the m-phase stator armatures in the primary part respectively; the permanent magnets in each area are arranged in the same way, and the permanent magnets of adjacent phases are staggered by 360 degrees/m degrees along the axial direction. Each phase of permanent magnet comprises k permanent magnet groups 7-1, each permanent magnet group 7-1 is composed of h permanent magnets with N poles and h S poles, the magnetizing directions of all adjacent permanent magnets are opposite, and the adjacent permanent magnet groups 7-1 can be arranged in the same or in reverse symmetry.
The secondary support 8 is a structural member for fixing the secondary permanent magnet 7, and ensures that the secondary permanent magnet 7 is not deformed and damaged in the movement process. The secondary support 8 includes two end rings disposed at both axial ends of the secondary permanent magnet 7 and a plurality of inter-pole supports disposed between two adjacent permanent magnets of any circumference.
Wherein tau is the polar distance of the permanent magnet in the axial direction and is a positive real number, and m, k, h, j are positive integers.
The operation principle of the motor of the present invention will be described with reference to fig. 3, 4, 5 and 6, where m is 3, k is 2, h is 6, and j is 10 in the present embodiment; the outer primary comprises 6 disc-shaped armature cores which are arranged in parallel along the axial direction and have the same structure, each disc-shaped armature core is provided with m × k (equal to 6 outer U-shaped armature modules 3) along the circumferential direction, all the outer U-shaped armature modules 3 (total 36) in the outer primary are provided with three-phase outer primary armatures 1, and each phase is uniformly distributed along the circumferential direction and sequentially occupies an angle of 360 °/m (equal to 120 °); each phase comprises 2 outer armature units 2 (for example, the A phase comprises 2 armature units, wherein 1 armature unit comprises A1-1, A1-2, A1-3, A1-4, A1-5 and A1-6, and the other 1 armature unit comprises A2-1, A2-2, A2-3, A2-4, A2-5 and A2-6), and the 2 outer armature units 2 are uniformly distributed in the circumferential direction in a phase range; the windings in the 2 outer armature units 2 can form a phase winding by series connection or parallel connection; each outer armature unit 2 is composed of 6 outer U-shaped armature modules 3 which are uniformly distributed along the axial direction, the windings of the adjacent outer U-shaped armature modules 3 are connected in series in an opposite direction (for example, two adjacent outer U-shaped armature modules A1-1 and A1-2) and the axial distance between the centers of the adjacent outer U-shaped armature modules 3 is tau which is the polar distance of the permanent magnet in the axial direction; 6 outer U-shaped armature modules 3 are uniformly distributed on the same disc-shaped armature core along the circumferential direction and are mutually independent, and a gap is formed between every two adjacent outer U-shaped armature modules 3.
Similarly, the inner primary structure is similar to the outer primary structure, the inner primary is arranged inside the secondary, the outer primary is arranged outside the secondary, the armature units of each phase of the inner primary and the outer primary respectively correspond to each other one by one, and the magnetic circuits are connected in series.
At time t, each armature module (3, 6), and its corresponding permanent magnet arrangement, in one phase is as shown in fig. 3 and 4. As can be seen from the figure, all the permanent magnets are hinged in the U-shaped core winding by the magnetic flux, that is, all the permanent magnets generate magnetic flux linkage in the independent coils. At time t + τ/v, each armature module (3, 6), and its corresponding permanent magnet arrangement, in one phase is as shown in fig. 5 and 6. It can be seen from the figure that all the permanent magnets are also hinged with the magnetic flux in the U-shaped core winding at this time, and the direction of the magnetic flux is exactly opposite to that in fig. 3 and 4. In summary, during the motion of the linear motor, the magnetic flux linkage in each independent coil is changed, and the changed back electromotive force is generated. Because the phase windings have a difference of 360 DEG/m electrical angle, the motor generates multi-phase back electromotive force; certain current is correspondingly introduced, and thrust can be generated.
It can be seen from the operation of the motor that all the permanent magnets in the motor of the present invention are utilized at any time. In addition, a phase winding is formed by connecting a plurality of independent coils in series or in parallel, so that armature leakage flux of the phase winding is greatly reduced compared with armature leakage flux of a one-phase concentrated winding form of a traditional transverse flux motor in the electrifying process. All of the above factors will contribute to the improvement of the transverse flux motor power factor of the present invention.
Further, when the motor of the present invention is exemplified by an m-phase motor, the phase θ of each phase1、θ2、θ3… …, each phase of the force can be decomposed into the form of a Fourier series as follows:
total positioning force F after m-phase synthesiscogTCan be expressed as:
in the formula FA、FB、FC、FC-A, B, C, … m phase detent force;
Fm、F2m、F3m-harmonic amplitudes of order m, 2m and 3 m;
τ — pole pitch of the motor.
The total positioning force of the three-phase transverse flux linear motor disclosed by the invention is only a harmonic component which is multiple of m, the fundamental component and other harmonic components of each phase of positioning force are mutually offset, and the total positioning force of the motor is greatly reduced. When more phase structures are adopted, the positioning force of the motor is reduced to a greater extent.
The motor can adopt a movable primary structure and a movable secondary structure, modular motor units are expanded into motors of any phase according to requirements, the more the number of phases of the transverse motors is, the more the positioning forces are mutually counteracted, and the thrust fluctuation of the motor can be improved. The motor has the advantages of high thrust density, high power factor and quick dynamic response, can be applied to linear motion occasions such as a servo system, ship electromagnetic ejection, an oil pumping machine, an elevator, a power generation system and the like, and has wide application prospect.
The second embodiment is as follows: the present embodiment will be described with reference to fig. 7 to 9.
Fig. 7 and 9 are a schematic structural view and a motor sectional view of a novel transverse flux permanent magnet synchronous linear motor with a lighter mover in the second embodiment.
Fig. 8 is a plan view of a secondary permanent magnet of a novel lateral flux permanent magnet synchronous linear motor with a lighter weight mover in accordance with a second embodiment.
The difference from the first embodiment is only that: the k outer armature units 2 in phase are arranged continuously in the circumferential direction and occupy 360 °/m angle each time, and the k inner armature units 5 in phase are arranged continuously in the circumferential direction and occupy 360 °/m angle each time. Two adjacent permanent magnet groups 4-1 in the secondary pole are arranged in a reverse symmetrical mode.
The permanent magnet motor has the advantages that the circumferential magnetic flux leakage of the permanent magnet is reduced, the utilization rate of the permanent magnet is improved, and the power factor of the motor is further improved.
The third concrete implementation mode: this embodiment will be described with reference to fig. 10 and 11.
Fig. 10 and 11 are a schematic structural view and a motor sectional view of a novel transverse flux permanent magnet synchronous linear motor with a lighter mover in a third embodiment.
The difference from the first embodiment is only that: the outer primary U-shaped armature modules 3 and the inner primary U-shaped armature modules 3, which are independent from each other, are connected to each other at the circumferential yoke portion in consideration of mechanical strength, machining, and mounting processes to form an integrated primary core module.
The embodiment has the advantages that the number of the primary armature modules is reduced and the mechanical strength of the motor is improved under the condition that the performance of the motor is basically unchanged.
The fourth concrete implementation mode: this embodiment will be described with reference to fig. 12 and 13.
Fig. 12 and 13 are a schematic structural view and a motor sectional view of a novel transverse flux permanent magnet synchronous linear motor with a lighter mover in accordance with a fourth embodiment.
The difference from the second embodiment is only that: the outer primary U-shaped armature modules 3 and the inner primary U-shaped armature modules 3, which are independent from each other, are connected to each other at the circumferential yoke portion in consideration of mechanical strength, machining, and mounting processes to form an integrated primary core module.
The embodiment has the advantages that the number of the primary armature modules is reduced and the mechanical strength of the motor is improved under the condition that the performance of the motor is basically unchanged.
The fifth concrete implementation mode: this embodiment will be described with reference to fig. 14 to 16.
Fig. 14 and 16 are a schematic structural view and a motor sectional view of a rotor lightweight novel transverse flux permanent magnet synchronous linear motor according to a fifth embodiment.
Fig. 15 is a plan view of a secondary permanent magnet of a novel lateral flux permanent magnet synchronous linear motor with a lighter weight mover in accordance with a fifth embodiment.
The rotor light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor comprises an outer primary, an inner primary and a secondary, wherein the secondary is arranged between the outer primary and the inner primary;
the outer primary comprises an outer primary armature 1, the outer primary armature 1 is m phases, all the phases are uniformly distributed along the axial direction and are sequentially spaced by 2i tau +/-2 tau/m, i is 0,1,2 and …; each phase comprises k outer armature units 2, and the k outer armature units 2 are uniformly distributed along the circumferential direction; the windings in the k outer armature units 2 form a phase winding by series connection or parallel connection; each outer armature unit 2 is composed of h outer U-shaped armature modules 3 which are uniformly distributed along the axial direction, windings of the adjacent outer U-shaped armature modules 3 are connected in series in an opposite direction, the axial distance of the centers of the adjacent outer U-shaped armature modules 3 in each phase is tau, and the tau is the polar distance of the permanent magnet in the axial direction;
the inner primary comprises an inner primary armature 4, the inner primary armature 4 is m phases, all the phases are uniformly distributed along the axial direction and are sequentially spaced by 2i tau +/-2 tau/m, i is 0,1,2 and …; each phase comprises k inner armature units 5, and the k inner armature units 5 are uniformly distributed in the circumferential direction in a phase range; the windings in the k inner armature units 5 can form a phase winding by being connected in series or in parallel; each inner armature unit 5 is composed of h inner U-shaped armature modules 6 which are uniformly distributed along the axial direction, the windings of the adjacent inner U-shaped armature modules 6 are connected in series in an opposite direction, and the axial distance between the centers of the adjacent inner U-shaped armature modules 6 is tau.
The outer U-shaped armature module 3 and the inner U-shaped armature module 6 are identical in structure, the outer U-shaped armature module 3 comprises a U-shaped iron core 3-1 and winding coils wound on 2U-shaped iron core teeth, namely a first winding coil 3-2 and a second winding coil 3-3; the first winding coil 3-2 and the second winding coil 3-3 satisfy the following relationship: if the winding directions of the first winding coil 3-2 and the second winding coil 3-3 on the U-shaped iron core teeth are the same, the first winding coil and the second winding coil are connected in series in an opposite direction; if the winding directions of the first winding coil 3-2 and the second winding coil 3-3 on the U-shaped iron core teeth are opposite, the first winding coil and the second winding coil are connected in series in the positive direction.
In order to increase the magnetic concentration effect of the outer U-shaped armature module 3, the U-shaped iron core 3-1 is also provided with magnetic concentration pole shoes 3-4 which are of a boss structure extending along the peripheral direction, and the extending distance does not exceed the area corresponding to the permanent magnet in the lower secondary of the same pole.
M × k U-shaped armature modules 3 located on the same circumference are independent of each other, and a gap is provided between two adjacent U-shaped armature modules 3.
The secondary comprises a secondary permanent magnet 7 and a secondary support 8, the secondary support 8 is used for supporting the secondary permanent magnet 7 which is arranged into a permanent magnet array;
the secondary permanent magnet 7 is a permanent magnet array fixed on the secondary support member 8, the secondary permanent magnet 7 is averagely divided into 2k areas along the circumferential direction, and the areas correspond to the outer U-shaped armature modules 3 in the outer primary and the inner U-shaped armature modules 6 in the inner primary respectively one by one; each phase of permanent magnet comprises k permanent magnet groups 7-1, each permanent magnet group 7-1 is formed by arranging j permanent magnets with the same N pole and j S poles in parallel along the axial direction, j is larger than m multiplied by h, the magnetizing directions of all adjacent permanent magnets are opposite, and the adjacent permanent magnet groups 7-1 in the same phase are arranged in the same or in reverse symmetry.
The secondary support 8 includes two end rings disposed at both axial ends of the secondary permanent magnet 7 and a plurality of inter-pole supports disposed between two adjacent permanent magnets of any circumference.
The sixth specific implementation mode: this embodiment will be described with reference to fig. 17 and 18.
Fig. 17 and 18 are a schematic structural view and a motor sectional view of a novel transverse flux permanent magnet synchronous linear motor with a lighter mover in a sixth embodiment.
The difference from the fifth embodiment is only that: the outer primary U-shaped armature modules 3 and the inner primary U-shaped armature modules 3, which are independent from each other, are connected to each other at the circumferential yoke portion in consideration of mechanical strength, machining, and mounting processes to form an integrated primary core module.
The embodiment has the advantages that the number of the primary armature modules is reduced and the mechanical strength of the motor is improved under the condition that the performance of the motor is basically unchanged.
The above description is only for the purpose of illustrating the present invention and is not intended to limit the present invention, and all modifications, equivalents and improvements made on the basis of the present invention should be included in the scope of the present invention.
Claims (10)
1. The rotor light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor is characterized by comprising an outer primary, an inner primary and a secondary, wherein the secondary is arranged between the outer primary and the inner primary;
the outer primary comprises an outer primary armature (1), the outer primary armature (1) is m phases, each phase comprises k outer armature units (2), and the k outer armature units (2) are uniformly distributed in the circumferential direction in a phase range; the windings in the k outer armature units (2) can form a phase winding by being connected in series or in parallel; each outer armature unit (2) is composed of h outer U-shaped armature modules (3) which are uniformly distributed along the axial direction, windings of the adjacent outer U-shaped armature modules (3) are connected in series in an opposite direction, the axial distance between the centers of the adjacent outer U-shaped armature modules (3) is tau, and the tau is the polar distance of the permanent magnet in the axial direction;
the inner primary comprises an inner primary armature (4), the inner primary armature (4) is m-phase, each phase comprises k inner armature units (5), and the k inner armature units (5) are uniformly distributed in a phase range along the circumferential direction; the windings in the k inner armature units (5) can form a phase winding by being connected in series or in parallel; each inner armature unit (5) is composed of h inner U-shaped armature modules (6) which are uniformly distributed along the axial direction, windings of the adjacent inner U-shaped armature modules (6) are connected in series in an opposite direction, and the axial distance between the centers of the adjacent inner U-shaped armature modules (6) is tau;
the radial positions of the k outer armature units (2) and the k inner armature units (5) are respectively in one-to-one correspondence.
2. The rotor light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor is characterized by comprising an outer primary, an inner primary and a secondary, wherein the secondary is arranged between the outer primary and the inner primary;
the outer primary comprises an outer primary armature (1), the outer primary armature (1) is m phases, all the phases are uniformly distributed along the axial direction and are sequentially spaced by 2i tau +/-2 tau/m, i is 0,1,2 and …; each phase comprises k outer armature units (2), and the k outer armature units (2) are uniformly distributed along the circumferential direction; the windings in the k outer armature units (2) are connected in series or in parallel to form a phase winding; each outer armature unit (2) is composed of h outer U-shaped armature modules (3) which are uniformly distributed along the axial direction, windings of the adjacent outer U-shaped armature modules (3) are connected in series in an opposite direction, the axial distance of the centers of the adjacent outer U-shaped armature modules (3) in each phase is tau, and the tau is the polar distance of the permanent magnet in the axial direction;
the inner primary comprises an inner primary armature (4), the inner primary armature (4) is m phases, all the phases are uniformly distributed along the axial direction and are sequentially spaced by 2i tau +/-2 tau/m, i is 0,1,2 and …; each phase comprises k inner armature units (5), and the k inner armature units (5) are uniformly distributed in the circumferential direction in a phase range; the windings in the k inner armature units (5) can form a phase winding by being connected in series or in parallel; each inner armature unit (5) is composed of h inner U-shaped armature modules (6) which are uniformly distributed along the axial direction, windings of the adjacent inner U-shaped armature modules (6) are connected in series in an opposite mode, and the axial distance between the centers of the adjacent inner U-shaped armature modules (6) is tau.
3. The mover lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to claim 1, wherein k outer armature units (2) in phase are uniformly distributed in a circumferential direction and occupy 360 °/m angle per phase, and k armature units 5 in phase are uniformly distributed in a circumferential direction and occupy 360 °/m angle per phase.
4. The mover lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to claim 1, characterized in that k outer armature units (2) in phase are arranged continuously in a circumferential direction and occupy 360 °/m angle each time, and k inner armature units (5) in phase are arranged continuously in a circumferential direction and occupy 360 °/m angle each time.
5. The mover light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor according to claim 1 or 2, wherein the outer U-shaped armature module (3) and the inner U-shaped armature module (6) are identical in structure, the outer U-shaped armature module (3) comprises a U-shaped iron core (3-1) and winding coils wound on 2U-shaped iron core teeth, namely a first winding coil (3-2) and a second winding coil (3-3); the first winding coil (3-2) and the second winding coil (3-3) satisfy the following relationship: if the winding directions of the first winding coil (3-2) and the second winding coil (3-3) on the U-shaped iron core teeth are the same, the first winding coil and the second winding coil are connected in series in a reverse direction; if the winding directions of the first winding coil (3-2) and the second winding coil (3-3) on the U-shaped iron core teeth are opposite, the first winding coil and the second winding coil are connected in series in the positive direction.
6. The mover light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor as claimed in claim 5, wherein the U-shaped iron core (3-1) is further provided with a magnetic pole gathering pole shoe (3-4), the magnetic pole gathering pole shoe is of a boss structure extending along the circumferential direction, and the extending distance does not exceed the area corresponding to the permanent magnet in the lower secondary of the same pole.
7. The mover light-weight high-thrust-density transverse flux permanent magnet synchronous linear motor according to claim 6, wherein m x k outer U-shaped armature modules (3) on the same circumference are independent from each other, and a gap is formed between every two adjacent outer U-shaped armature modules (3); or the yoke parts of m multiplied by k outer U-shaped armature modules (3) which are positioned on the same circumference are connected to form an integrated primary core module.
8. The mover lightweight high thrust density transverse flux permanent magnet synchronous linear motor of claim 1, characterized in that the secondary comprises secondary permanent magnets (7) and secondary supports (8), the secondary supports (8) being for supporting the secondary permanent magnets (7) arranged as an array of permanent magnets;
the secondary permanent magnet (7) is averagely divided into m areas along the circumferential direction and respectively corresponds to the m-phase stator armatures in the primary; the permanent magnets in each area are arranged in the same way, and the permanent magnets of adjacent phases are staggered by 360 degrees/m degrees along the axial direction; each phase of permanent magnet comprises k permanent magnet groups (7-1), each permanent magnet group (7-1) is composed of j permanent magnets with the same N pole and j S poles, j is larger than or equal to h, the magnetizing directions of all adjacent permanent magnets are opposite, and the adjacent permanent magnet groups (7-1) are arranged in the same or reverse symmetry; the magnetizing direction of the secondary permanent magnet (7) is radial magnetizing or parallel magnetizing.
9. The mover lightweight high thrust density transverse flux permanent magnet synchronous linear motor of claim 2, characterized in that the secondary comprises secondary permanent magnets (7) and secondary supports (8), the secondary supports (8) being for supporting the secondary permanent magnets (7) arranged as an array of permanent magnets;
the secondary permanent magnet (7) is a permanent magnet array fixed on the secondary support (8), the secondary permanent magnet (7) is averagely divided into 2k areas along the circumferential direction, and the areas correspond to the outer U-shaped armature modules (3) in the outer primary and the inner U-shaped armature modules (6) in the inner primary respectively one by one; each phase of permanent magnet comprises k permanent magnet groups (7-1), each permanent magnet group (7-1) is formed by arranging j permanent magnets with the same N pole and j S poles in parallel along the axial direction, j is larger than m multiplied by h, the magnetizing directions of all adjacent permanent magnets are opposite, and the adjacent permanent magnet groups (7-1) in the same phase are arranged in the same or in reverse symmetry.
10. The mover lightweight high thrust density transverse flux permanent magnet synchronous linear motor according to claim 8 or 9, wherein the secondary support member (8) comprises two end rings disposed at both axial ends of the secondary permanent magnet (7) and a plurality of inter-pole support members disposed between any circumferentially adjacent two permanent magnets.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114865877A (en) * | 2022-07-08 | 2022-08-05 | 四川大学 | High-thrust-density cylindrical transverse flux permanent magnet linear motor |
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| CN102255470A (en) * | 2011-06-10 | 2011-11-23 | 哈尔滨工业大学 | LPMSM (linear permanent magnet synchronous motor) with low-thrust fluctuation |
| CN102361388A (en) * | 2011-11-04 | 2012-02-22 | 哈尔滨工业大学 | Thrust fluctuation active compensation type linear permanent magnet synchronous motor |
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