CN114865877B - High-thrust-density cylindrical transverse flux permanent magnet linear motor - Google Patents
High-thrust-density cylindrical transverse flux permanent magnet linear motor Download PDFInfo
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- CN114865877B CN114865877B CN202210801818.8A CN202210801818A CN114865877B CN 114865877 B CN114865877 B CN 114865877B CN 202210801818 A CN202210801818 A CN 202210801818A CN 114865877 B CN114865877 B CN 114865877B
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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
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
- H02K2201/12—Transversal flux machines
Abstract
The invention discloses a high-thrust-density cylindrical transverse flux permanent magnet linear motor, which relates to the technical field of linear motors and comprises a secondary and a primary, wherein the secondary comprises an inner secondary and an outer secondary, the primary is positioned in an annular space formed by the inner secondary and the outer secondary, the movement direction of the primary is parallel to the axial direction of the linear motor, and air gaps of the motor are formed between the inner secondary and the primary and between the outer secondary and the primary. The cylindrical transverse flux permanent magnet linear motor formed by the invention can improve the space utilization rate of the primary side of the linear motor and improve the air gap flux density and the thrust density; meanwhile, magnetic isolation among phases of the linear motor can be realized, mutual inductance among windings is eliminated, control is simple, modular design is easy, and the problems that an existing cylindrical linear motor iron core is complex in assembly process, low in space utilization rate and low in thrust density are solved.
Description
Technical Field
The invention relates to the technical field of linear motors, in particular to a high-thrust-density cylindrical transverse flux permanent magnet linear motor.
Background
The linear motor is adopted to directly drive the load to perform unidirectional or reciprocating linear motion, so that the problems of position precision reduction, system efficiency reduction, increased abrasion, noise increase and the like caused by an intermediate mechanical conversion transmission device when the traditional rotating motor indirectly drives the load can be solved, the linear motor has remarkable performance advantages and good application prospect, and the high-performance linear motor and the driving system thereof become a key research direction in the field of motors.
Compared with a flat-plate linear motor, the cylindrical linear motor can effectively avoid the transverse end effect and improve the thrust density of the linear motor. Meanwhile, in view of the characteristics of the structure and the magnetic circuit of the traditional cylindrical permanent magnet linear motor, the motor often has the problems of complex iron core processing, high assembly difficulty and the like. The transverse flux motor technology is a novel technology in the field of motor body topology in recent years, the plane of a main flux loop in the motor is perpendicular to the motion direction of the motor, the electromagnetic load of the motor is decoupled relatively in space, and the thrust density of the motor can be improved within a certain range at the same time. The transverse flux motor technology and the cylindrical permanent magnet linear motor technology are combined with each other, so that the thrust density of the linear motor can be increased, and the processing and assembling difficulty of the motor iron core can be reduced. However, in the existing cylindrical transverse flux linear motor topology, the magnetic leakage phenomenon of the excitation permanent magnet is serious, the effective flux ratio is not high, the air gap flux density is low, and the thrust density is limited; meanwhile, the space between the primary iron cores of the existing transverse cylindrical flux linear motor is 2 times of the pole distance of the permanent magnet due to the limitation of the flux distribution characteristics in the transverse flux motor, and a large amount of redundant space exists between the adjacent primary iron cores, so that the waste of the motor space is caused; by combining the above factors, the thrust density of the existing cylindrical transverse flux permanent magnet linear motor needs to be further improved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a high-thrust-density cylindrical transverse flux permanent magnet linear motor, which improves the primary space utilization rate of the motor, improves the air gap flux density, effectively increases the thrust density of the motor and eliminates the influence of the primary interelectrode normal force.
The purpose of the invention is realized by the following technical scheme: the utility model provides a high thrust density cylinder type transverse flux permanent magnet linear electric motor, includes secondary and elementary, the secondary includes inboard secondary and outside secondary, elementary being located in the annular space that inboard secondary and outside secondary formed, elementary direction of motion is parallel with linear electric motor's axis direction, between inboard secondary and elementary, all form the air gap of motor between outside secondary and the elementary.
Further, the primary part comprises three single-phase primary parts which respectively form a U phase, a V phase and a W phase of the linear motor, and the axial length of the primary part is smaller than that of the secondary part.
Further, the single-phase primary comprises a plurality of iron core assemblies, the iron core assemblies are closely arranged along the axial direction of the linear motor, a primary partition plate is arranged between every two adjacent iron core assemblies, each iron core assembly comprises a primary iron core unit I and a primary iron core unit II, the primary partition plate is arranged between the primary iron core unit II and the primary iron core unit I in an attached mode, a winding is sleeved on the primary, and the winding is in a racetrack-shaped centralized mode.
Furthermore, the primary iron core unit I and the primary iron core unit II are both in a circular ring shape, a plurality of tooth sockets are uniformly formed in the inner side and the outer side of the primary iron core unit I and the inner side and the outer side of the primary iron core unit II along the circumferential direction of the primary iron core unit I, the tooth sockets on the inner side and the outer side of the primary iron core unit I are arranged in a staggered mode along the circumferential direction, the tooth center line on the inner side of the primary iron core unit I is aligned with the tooth center line on the inner side of the adjacent primary iron core unit II, the tooth center line on the outer side of the primary iron core unit I is aligned with the tooth center line on the outer side of the adjacent primary iron core unit II, and the distance between the primary iron core unit I and the adjacent primary iron core unit II is the same as the polar distance of the secondary iron.
Furthermore, the windings are arranged in inner and outer conductor slots formed by surrounding the first primary iron core unit and the second inner and outer tooth slots of the primary iron core unit, and the windings in the same phase are sequentially connected in series end to form a single-phase primary winding.
Further, the inner secondary is annular, the inner secondary is sleeved on the motor shaft and comprises a plurality of inner secondary iron cores, an inner secondary permanent magnet is arranged between any two adjacent inner secondary iron cores, the inner secondary iron cores and the inner secondary permanent magnets are closely arranged, the magnetizing direction of each inner secondary permanent magnet is parallel to the axis direction of the inner secondary permanent magnet, the magnetizing directions of any two adjacent inner secondary permanent magnets are opposite, and the inner secondary permanent magnets are all aligned in sequence along the motion direction of the linear motor.
Furthermore, the outer secondary is annular, the outer secondary comprises a plurality of outer secondary iron cores, an outer secondary permanent magnet is arranged between any two adjacent outer secondary iron cores, the plurality of outer secondary permanent magnets are all aligned in sequence along the motion direction of the linear motor, the magnetizing direction of the outer secondary permanent magnet on the same section along the radius direction of the motor shaft is opposite to that of the inner secondary permanent magnet, the outer secondary iron cores and the outer secondary permanent magnets are closely arranged, and the magnetizing directions of any two adjacent outer secondary permanent magnets are opposite; the pole distance between two adjacent outer secondary permanent magnets is equal to the pole distance between two adjacent inner secondary permanent magnets, and the pole distance between two adjacent outer secondary permanent magnets is equal to the pole distance between the first primary iron core unit and the second adjacent primary iron core unit.
Further, the primary is a three-phase primary, three-phase windings of the linear motor are all arranged on the primary, and the axial length of the primary is larger than that of the secondary.
Further, the primary is equally divided into three phases of the motor along the circumferential direction, the primary comprises a first iron core assembly, the first iron core assemblies are closely distributed along the axial direction of the linear motor, a first primary partition plate is arranged between every two adjacent first iron core assemblies, the first iron core assembly comprises a third primary iron core unit and a fourth primary iron core unit, the first primary partition plate is arranged between the third primary iron core unit and the fourth primary iron core unit in an attached mode, a first winding is sleeved on the primary, and the first winding is in a racetrack-shaped centralized mode.
Further, the inner secondary is provided with a plurality of inner secondary which are closely arranged along the axial direction of the primary, the inner secondary comprises three single-row secondary units, the three single-row secondary units are closely arranged in a circular ring shape along the circumferential direction of the primary, the single-row secondary units comprise fan-shaped inner secondary cores and fan-shaped inner secondary permanent magnets which are axially arranged along the primary, the permanent magnet polar distances of 2/3 are staggered between the fan-shaped inner secondary permanent magnets in any two adjacent single-row secondary units, the outer secondary is provided with a plurality of outer secondary which are closely arranged along the axial direction of the primary, the outer secondary comprises three single-row secondary which are closely arranged in a circular ring shape along the circumferential direction of the primary, and the single-row secondary comprises fan-shaped outer secondary cores and fan-shaped outer secondary permanent magnets which are axially arranged along the primary, the permanent magnet polar distance that 2/3 staggers each other between the outer secondary permanent magnet of fan-shaped in arbitrary adjacent two in the single rank secondary, wherein, the polar distance of secondary permanent magnet is the same with the polar distance of the outer secondary permanent magnet of fan-shaped in the fan-shaped, in linear electric motor's the axis direction, the symmetrical center line of secondary permanent magnet aligns outside fan-shaped with the symmetrical center line of the outer secondary permanent magnet of fan-shaped in the fan-shaped, and along the plane of arbitrary perpendicular to motor shaft, secondary permanent magnet and corresponding in the fan-shaped the magnetization direction of the outer secondary permanent magnet of fan-shaped is opposite.
The invention has the beneficial effects that:
1. through the special magnetic circuit design of the bilateral secondary (namely the inner secondary and the outer secondary) unilateral primary, the distance between the inner core units of each phase primary is reduced from 2 times of the pole distance of the permanent magnet in the traditional transverse flux motor to 1 time of the pole distance of the permanent magnet, and the utilization rate of the primary space of the linear motor is obviously improved.
2. The effective magnetic flux density in the air gaps on the inner side and the outer side of the motor is obviously improved through the magnetism gathering effect of the inner secondary iron core and the inner secondary permanent magnet as well as the outer secondary iron core and the outer secondary permanent magnet of the motor, compared with the traditional linear permanent magnet motor and a transverse magnetic flux linear motor, the permanent magnet magnetic flux of the interlinkage winding is obviously increased, the thrust density of the linear motor can be improved, and the power factor of the motor can be improved.
3. Because the primary parts of the motor are mutually independent in space and have no magnetic path coupling between phases, the iron core components of the primary parts of the motor are easy to modularly design, the number can be further expanded to a multi-phase structure by a traditional three-phase structure, and the fault-tolerant capability of the motor is favorably improved.
4. The motor is designed into a cylindrical bilateral structure, theoretically, the problems of additional friction force and guide rail loss caused by normal force are eliminated, and the service life of the linear guide rail can be prolonged.
Drawings
Fig. 1 is an overall cross-sectional schematic view of a first embodiment of a high thrust density cylindrical transverse flux permanent magnet linear motor according to the present invention;
FIG. 2 is a perspective view of a single-phase primary in accordance with an embodiment of the present invention;
FIG. 3 is an axial view of a single phase primary in accordance with an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a primary core unit i according to a first embodiment of the present invention;
fig. 5 is a schematic structural diagram of a primary core unit ii according to a first embodiment of the present invention;
FIG. 6 is a schematic structural diagram of a primary partition according to an embodiment of the present invention;
FIG. 7 is a schematic structural diagram of a second stage according to a first embodiment of the present invention;
FIG. 8 is a schematic cross-sectional view of a second stage of the first embodiment of the present invention;
FIG. 9 is a perspective view of an inboard sub-level in accordance with one embodiment of the present invention;
FIG. 10 is a perspective view of an outboard sub-level of one embodiment of the present invention;
FIG. 11 is an overall cross-sectional view of a second embodiment of the present invention;
FIG. 12 is a perspective view of a second embodiment of the present invention;
FIG. 13 is a schematic diagram of the distribution of the first primary inner winding according to the second embodiment of the present invention;
FIG. 14 is a schematic cross-sectional view of a second embodiment of the present invention;
FIG. 15 is a perspective view of the inner secondary of the second embodiment of the present invention;
FIG. 16 is a perspective view of the outside secondary in a second embodiment of the present invention;
FIG. 17 is a schematic diagram showing the relative position relationship between the primary and secondary in a high thrust density cylindrical transverse flux permanent magnet linear motor according to the present invention;
FIG. 18 is a schematic view of the magnetic circuit distribution of the present invention in the cross-sectional view taken along line A-A of FIG. 17;
FIG. 19 is a schematic view of the magnetic circuit distribution of the present invention in the cross-sectional view along the line B-B in FIG. 17;
in the figure, 1-inner secondary, 2-primary, 3-outer secondary, 4-primary core unit one, 5-primary core unit two, 6-primary spacing plate, 7-winding, 8-tooth space, 9-inner secondary core, 10-inner secondary permanent magnet, 11-outer secondary core, 12-motor shaft, 13-outer secondary permanent magnet, 14-primary spacing plate one, 15-primary core unit three, 16-primary core unit four, 17-winding one, 18-single-row secondary unit, 19-fan-shaped inner secondary core, 20-fan-shaped inner secondary permanent magnet, 21-single-row secondary, 22-fan-shaped outer secondary core, 23-fan-shaped outer secondary permanent magnet, 24-motor housing, 25-end cap.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the following.
Embodiment one, as shown in fig. 1 to 10, a high thrust density cylindrical transverse flux permanent magnet linear motor includes a secondary and a primary 2, the secondary includes an inner secondary 1 and an outer secondary 3, the primary 2 is located in an annular space formed by the inner secondary 1 and the outer secondary 3, the movement direction of the primary 2 is parallel to the axial direction of the linear motor, the secondary and the primary 2 are arranged in a motor housing 24, end caps 25 are arranged at both ends of the motor housing 24, air gaps of the motor are formed between the inner secondary 1 and the primary 2, and between the outer secondary 3 and the primary 2, through the special magnetic circuit design of the bilateral secondary (namely, the inner side secondary and the outer side secondary) unilateral primary, the distance between the inner core units of the primary phases is reduced from 2 times of the pole distance of the permanent magnet in the traditional transverse flux motor to 1 time of the pole distance of the permanent magnet, and the utilization rate of the primary space of the linear motor is obviously improved; the primary 2 comprises three single-phase primary parts which respectively form a U phase, a V phase and a W phase of the linear motor, the axial length of the primary 2 is smaller than that of the secondary part, namely the primary 2 of the linear motor is short and the secondary part is long, and the primary inter-pole is an air gap of the linear motor.
Further, as shown in fig. 2 to 6, the single-phase primary includes a plurality of iron core assemblies, the plurality of iron core assemblies are closely arranged along an axial direction of the linear motor, a primary spacer 6 is disposed between two adjacent iron core assemblies, the iron core assembly includes a primary iron core unit one 4 and a primary iron core unit two 5, the primary spacer 6 is disposed between the primary iron core unit two 5 and the primary iron core unit one 4 in a fitting manner, a winding 7 is sleeved on the primary 2, the winding 7 is in a racetrack shape, the winding 7 is in a ring shape, the primary iron core unit one 4 and the primary iron core unit two 5 are both in a ring shape, a plurality of tooth spaces 8 are uniformly disposed along a circumferential direction of the primary iron core unit one 4 on an inner side and the primary iron core unit two 5 on an outer side, the tooth spaces 8 on the primary iron core unit one 4 on an inner side and the tooth spaces 8 on an outer side are arranged along a circumferential direction in a staggered manner, the tooth spaces 8 on the primary iron core unit two 5 on an inner side and the outer side are arranged in a staggered manner along a circumferential direction, the tooth center line of the inner side of a first primary iron core unit 4 is aligned with the groove center line of the inner side of a second adjacent primary iron core unit 5, the tooth center line of the outer side of the first primary iron core unit 4 is aligned with the groove center line of the outer side of the second adjacent primary iron core unit 5, the distance between the first primary iron core unit 4 and the second adjacent primary iron core unit 5 is the same as the polar distance of a secondary, a winding 7 is arranged in an inner conductor groove and an outer conductor groove formed by surrounding inner tooth grooves and outer tooth grooves of the first primary iron core unit 4 and the second primary iron core unit 5, the windings in the same phase are sequentially connected in series end to form a single-phase primary winding, a planned path is provided for the flux of a permanent magnet in the motor, all the fluxes generated by permanent magnets with opposite magnetizing directions in the motor at the same moment are linked with an armature winding in the same direction, the moment when the linked flux reaches the positive maximum value is taken as an example, only the flux generated by one direction or half of the permanent magnet at the same moment in the iron core arrangement mode in the traditional transverse flux motor is taken as the effective flux, the permanent magnet material is wasted, and the arrangement mode of the invention can simultaneously utilize the magnetic flux generated by all the permanent magnets, thereby obviously improving the interlinkage magnetic flux value of the motor and the utilization rate of the magnetic flux of the permanent magnets and further improving the thrust density and the power density of the motor; as shown in fig. 7 to 10, the inner secondary 1 is in a circular ring shape, the inner secondary 1 is sleeved on the motor shaft 12, the inner secondary 1 includes a plurality of inner secondary iron cores 9, an inner secondary permanent magnet 10 is disposed between any two adjacent inner secondary iron cores 9, the inner secondary iron cores 9 and the inner secondary permanent magnets 10 are closely arranged, the magnetizing direction of the inner secondary permanent magnets 10 is parallel to the axis direction of the inner secondary permanent magnets, the magnetizing directions of any two adjacent inner secondary permanent magnets 10 are opposite, and the plurality of inner secondary permanent magnets 10 are all aligned in sequence along the moving direction of the linear motor; the outer secondary 3 is in a ring shape, the outer secondary 3 comprises a plurality of outer secondary iron cores 11, an outer secondary permanent magnet 13 is arranged between any two adjacent outer secondary iron cores 11, the plurality of outer secondary permanent magnets 13 are all aligned in sequence along the motion direction of the linear motor, the magnetizing direction of the outer secondary permanent magnet 13 on the same section along the radius direction of the motor shaft 12 is opposite to that of the inner secondary permanent magnet 10, the outer secondary iron cores 11 and the outer secondary permanent magnets 13 are closely arranged, and the magnetizing directions of any two adjacent outer secondary permanent magnets 13 are opposite; the polar distance between two adjacent outer secondary permanent magnets 13 is equal to the polar distance between two adjacent inner secondary permanent magnets 10, and the polar distance between two adjacent outer secondary permanent magnets 13 is equal to the polar distance between the first primary iron core unit 4 and the second adjacent primary iron core unit 5; the effective magnetic flux density in air gaps on the inner side and the outer side of the motor is obviously improved through the magnetism gathering effect of the inner secondary iron core 9 and the inner secondary permanent magnet 10 of the motor, and the outer secondary iron core 11 and the outer secondary permanent magnet 13 of the motor.
In the second embodiment, as shown in fig. 11 to 16, a high thrust density cylindrical transverse flux permanent magnet linear motor includes a secondary and a primary 2, the secondary includes an inner secondary 1 and an outer secondary 3, the primary 2 is located in an annular space formed by the inner secondary 1 and the outer secondary 3, the movement direction of the primary 2 is parallel to the axial direction of the linear motor, the secondary and the primary 2 are disposed in a motor housing 24, end caps 25 are disposed at both ends of the motor housing 24, air gaps of the linear motor are formed between the inner secondary 1 and the primary 2 and between the outer secondary 3 and the primary 2, the primary 2 is a three-phase primary, three-phase windings of the linear motor are disposed on the primary 2, and the axial length of the primary 2 is greater than that of the secondary. The three-phase windings of the embodiment are all placed on the same primary 2, so that the motor space occupied by the end parts of the windings is saved, and the space utilization rate and the thrust density of the linear motor are improved.
Further, as shown in fig. 11 and 12, the primary core 2 is equally divided into three phases of the motor along the circumferential direction, that is, the primary core of the motor is equally divided into three phases along the circumferential direction, the primary core 2 includes a first core assembly, a plurality of first core assemblies are closely arranged along the axial direction of the linear motor, a first primary spacing plate 14 is arranged between two adjacent first core assemblies, the first core assembly includes a third primary core unit 15 and a fourth primary core unit 16, the first primary spacing plate 14 is arranged between the third primary core unit 15 and the fourth primary core unit 16 in an attaching manner, a first winding 17 is sleeved on the primary core 2, the first winding 17 is in a racetrack-shaped centralized manner, the structure of the third primary core unit 15 is identical to that of the first primary core unit 4 in the first embodiment, the structure of the fourth primary core unit 16 is identical to that of the second primary core unit 5 in the first embodiment, and the combination manner of the third primary core unit 15 is identical to that of the first primary core unit 4 in the first embodiment, the combination of the primary core unit four 16 is identical to the combination of the primary core unit two 5 in the first embodiment, except that the winding one 17 is extended from single phase to three phase with respect to the winding 7.
Further, as shown in fig. 13 to 16, the inner secondary 1 is provided in plural, the plural inner secondary 1 are closely arranged along the axial direction of the primary 2, the inner secondary 1 includes three single-row secondary units 18, the three single-row secondary units 18 are closely arranged in a circular ring shape along the circumferential direction of the primary 2, the single-row secondary unit 18 includes a fan-shaped inner secondary core 19 and a fan-shaped inner secondary permanent magnet 20 which are arranged along the axial direction of the primary 2, the permanent magnet pole pitch of 2/3 is staggered with each other between the fan-shaped inner secondary permanent magnets 20 in any two adjacent single-row secondary units 18, the plural outer secondary 3 are provided, the plural outer secondary 3 are closely arranged along the axial direction of the primary 2, the outer secondary 3 includes three single-row secondary 21, the three single-row secondary 21 is closely arranged in a circular ring shape along the circumferential direction of the primary 2, the single-row secondary 21 includes a fan-shaped outer secondary core 22 and a fan-shaped outer secondary permanent magnet 23 which are arranged along the axial direction of the primary 2, the pole pitch of the permanent magnets 2/3 are staggered with each other between the fan-shaped outer secondary permanent magnets 23 in any two adjacent single-row secondary magnets 21, wherein the pole pitch of the fan-shaped inner secondary permanent magnets 20 is the same as that of the fan-shaped outer secondary permanent magnets 23, the symmetric center line of the fan-shaped inner secondary permanent magnets 20 is aligned with the symmetric center line of the fan-shaped outer secondary permanent magnets 23 in the axial direction of the linear motor, and the magnetizing directions of the fan-shaped inner secondary permanent magnets 20 and the corresponding fan-shaped outer secondary permanent magnets 23 are opposite in any plane perpendicular to the motor shaft The thrust density of the motor is improved.
As shown in fig. 17 to 19, the relative positions of the primary and secondary poles of the internal schematic structure of the linear motor according to the present invention are typically set such that the permanent magnetic flux of the interlinkage winding reaches a maximum value. From the distribution law of the magnetic circuit shown in the figure, it can be known that: the plane of a main flux loop of a interlinkage winding in the motor is vertical to the motion direction of the motor, which indicates that the linear motor belongs to the category of transverse flux linear motors; through a unique magnetic circuit design, the directions of magnetic flux interlinkage windings in the primary core assemblies with two different structures (namely, a single-phase primary in the first embodiment and a three-phase primary in the second embodiment) are consistent; when the relative position of a primary winding and a secondary winding in the linear motor is continuously changed, the permanent magnetic flux linkage of the interlinkage winding is in bipolar alternate change, bipolar induced electromotive force is generated in the winding, and then according to the law of energy conservation, when alternating current with proper phase is introduced into the winding, the linear motor generates stable electromagnetic thrust; in the drawings, a letter R represents a radial direction (radial direction) of the motor, a letter Z represents an axial direction (axial direction) of the motor, and a letter θ represents a circumferential direction (circumferential direction) of the motor.
In summary, as can be seen from the description of the first and second embodiments, the inner and outer secondary permanent magnets in the transverse flux linear motor can provide permanent magnetic flux of the interlinkage winding, and on the premise that other conditions such as the motor volume, ampere turns, current density and the like are consistent, the motor structure of the invention is beneficial to improving the air gap flux density, increasing the thrust density of the transverse flux linear motor, improving the power factor of the transverse flux linear motor, and effectively improving the problems of low primary space utilization rate, low thrust density and low power factor in the existing transverse flux linear motor.
In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "two ends", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention; and those skilled in the art will recognize that the benefits of the present invention are to be achieved only in certain circumstances, and not directly to the best use in the industry, as compared to current implementations in the prior art.
The foregoing is illustrative of the preferred embodiments of the present invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and is not to be construed as limited to the exclusion of other embodiments, and that various other combinations, modifications, and environments may be used and modifications may be made within the scope of the concepts described herein, either by the above teachings or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. The utility model provides a high thrust density cylinder type transverse flux permanent magnetism linear electric motor, its characterized in that includes secondary and elementary (2), the secondary includes inboard secondary (1) and outside secondary (3), elementary (2) are located in the annular space that inboard secondary (1) and outside secondary (3) formed, the direction of motion of elementary (2) is parallel with linear electric motor's axis direction, between inboard secondary (1) and elementary (2), all form the air gap of motor between outside secondary (3) and elementary (2), elementary (2) are three-phase elementary, and linear electric motor's three-phase winding all sets up on elementary (2), the axial length of elementary (2) is greater than secondary axial length, elementary (2) divide equally the three-phase for the motor along the circumferencial direction, elementary (2) include iron core subassembly one, the plurality of first iron core assemblies are closely arranged along the axial direction of the linear motor, a first primary spacing plate (14) is arranged between every two adjacent first iron core assemblies, each first iron core assembly comprises a third primary iron core unit (15) and a fourth primary iron core unit (16), the first primary spacing plate (14) is arranged between the third primary iron core unit (15) and the fourth primary iron core unit (16) in a fit mode, a first winding (17) is sleeved on the primary winding (2), and the first winding (17) is in a runway-shaped centralized mode;
the inner secondary (1) is provided with a plurality of inner secondary units (1) which are closely arranged along the axial direction of the primary unit (2), the inner secondary unit (1) comprises three single-row secondary units (18), the single-row secondary units (18) are closely arranged into a circular ring shape along the circumferential direction of the primary unit (2), the single-row secondary units (18) comprise fan-shaped inner secondary iron cores (19) and fan-shaped inner secondary permanent magnets (20) which are axially arranged along the primary unit (2), the permanent magnet polar distances of 2/3 which are staggered mutually between the fan-shaped inner secondary permanent magnets (20) in any two adjacent single-row secondary units (18), the outer secondary (3) is provided with a plurality of outer secondary units (3) which are closely arranged along the axial direction of the primary unit (2), and the outer secondary units (3) comprise three single-row secondary units (21), three single-row secondary stages (21) are closely arranged in a circular ring shape along the circumferential direction of the primary stage (2), the single-row secondary (21) comprises a fan-shaped outer secondary iron core (22) and fan-shaped outer secondary permanent magnets (23) which are axially arranged along the primary (2), permanent magnet polar distances of 2/3 are staggered between the fan-shaped outer secondary permanent magnets (23) in any two adjacent single-row secondary (21), wherein the pole pitch of the secondary permanent magnet (20) in the fan shape is the same as that of the secondary permanent magnet (23) outside the fan shape along the axial direction of the linear motor, the symmetrical center line of the secondary permanent magnet (20) in the sector is aligned with the symmetrical center line of the secondary permanent magnet (23) outside the sector, and along any plane perpendicular to the motor shaft, the magnetizing directions of the fan-shaped inner secondary permanent magnets (20) and the corresponding fan-shaped outer secondary permanent magnets (23) are opposite.
2. A high thrust density cylindrical transverse flux permanent magnet linear motor is characterized by comprising a secondary and a primary (2), wherein the secondary comprises an inner secondary (1) and an outer secondary (3), the primary (2) is positioned in an annular space formed by the inner secondary (1) and the outer secondary (3), the movement direction of the primary (2) is parallel to the axial direction of the linear motor, air gaps of the motor are formed between the inner secondary (1) and the primary (2) and between the outer secondary (3) and the primary (2), the primary (2) comprises three primary single phases, the three single-phase primary phases form a U phase, a V phase and a W phase of the linear motor respectively, and the axial length of the primary (2) is smaller than that of the secondary;
the single-phase primary winding comprises a plurality of iron core assemblies, the iron core assemblies are closely arranged along the axial direction of the linear motor, a primary spacing plate (6) is arranged between every two adjacent iron core assemblies, each iron core assembly comprises a primary iron core unit I (4) and a primary iron core unit II (5), the primary spacing plate (6) is arranged between the primary iron core unit II (5) and the primary iron core unit I (4) in a fit mode, a winding (7) is sleeved on the primary winding (2), and the winding (7) is in a runway-shaped centralized mode; the primary iron core unit I (4) and the primary iron core unit II (5) are both in a ring shape, a plurality of tooth sockets (8) are uniformly arranged on the inner side and the outer side of the primary iron core unit I (4) and the inner side and the outer side of the primary iron core unit II (5) along the circumferential direction, the tooth sockets (8) on the inner side and the tooth sockets (8) on the outer side of the primary iron core unit I (4) are arranged in a staggered mode along the circumferential direction, the tooth sockets (8) on the inner side and the tooth sockets (8) on the outer side of the primary iron core unit II (5) are arranged in a staggered mode along the circumferential direction, the center line of the inner side teeth of the primary iron core unit I (4) is aligned with the center line of the inner side slots of the adjacent primary iron core unit II (5), the central line of the outer side teeth of the primary iron core unit I (4) is aligned with the central line of the groove at the outer side of the adjacent primary iron core unit II (5), the distance between the primary iron core unit I (4) and the adjacent primary iron core unit II (5) is the same as the polar distance of the secondary pole;
the windings (7) are arranged in inner and outer conductor grooves formed by surrounding inner and outer tooth grooves of the primary iron core unit I (4) and the primary iron core unit II (5), and the windings in the same phase are sequentially connected in series end to form a single-phase primary winding;
the inner secondary (1) is annular, the inner secondary (1) is sleeved on the motor shaft (12), the inner secondary (1) comprises a plurality of inner secondary iron cores (9), an inner secondary permanent magnet (10) is arranged between any two adjacent inner secondary iron cores (9), the inner secondary iron cores (9) and the inner secondary permanent magnets (10) are closely arranged, the magnetizing direction of the inner secondary permanent magnets (10) is parallel to the axis direction of the inner secondary permanent magnets, the magnetizing directions of any two adjacent inner secondary permanent magnets (10) are opposite, and the inner secondary permanent magnets (10) are all aligned in sequence along the moving direction of the linear motor;
the outer secondary (3) is annular, the outer secondary (3) comprises a plurality of outer secondary iron cores (11), an outer secondary permanent magnet (13) is arranged between any two adjacent outer secondary iron cores (11), the plurality of outer secondary permanent magnets (13) are all aligned in sequence along the motion direction of the linear motor, the magnetizing direction of the outer secondary permanent magnet (13) with the same section along the radius direction of the motor shaft (12) is opposite to that of the inner secondary permanent magnet (10), the outer secondary iron cores (11) and the outer secondary permanent magnets (13) are closely arranged, and the magnetizing directions of any two adjacent outer secondary permanent magnets (13) are opposite; the pole distance between two adjacent outer secondary permanent magnets (13) is equal to two adjacent pole distances between the inner secondary permanent magnets (10), and the pole distance between two adjacent outer secondary permanent magnets (13) is equal to the pole distance between the primary iron core unit I (4) and the adjacent primary iron core unit II (5).
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