CN112701873A - Plate type hybrid permanent magnet linear motor - Google Patents
Plate type hybrid permanent magnet linear motor Download PDFInfo
- Publication number
- CN112701873A CN112701873A CN202011337870.XA CN202011337870A CN112701873A CN 112701873 A CN112701873 A CN 112701873A CN 202011337870 A CN202011337870 A CN 202011337870A CN 112701873 A CN112701873 A CN 112701873A
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- primary
- permanent magnet
- motor
- guide rail
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
- H02K1/165—Shape, form or location of the slots
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Linear Motors (AREA)
Abstract
The invention discloses a plate type hybrid permanent magnet linear motor, which comprises a bottom plate, a motor primary and a motor secondary, wherein the front side and the rear side of the upper end surface of the bottom plate are respectively provided with a first guide rail and a second guide rail, the outer side of the second guide rail is provided with a magnetic grid ruler, a secondary back plate with the motor secondary is arranged on the bottom plate between the first guide rail and the second guide rail, sliding blocks are respectively arranged on the first guide rail and the second guide rail, the motor primary is arranged on the sliding blocks and comprises a primary winding and a primary iron core, the primary iron core is fixed in the primary back plate through a first bolt, the primary winding is arranged in the primary iron core, the motor secondary comprises a first permanent magnet group and a second permanent magnet group, and the first permanent magnet group and the second permanent magnet group are alternately arranged according to different polarities and then are flatly laid and fixed on; the first permanent magnet group and the second permanent magnet group respectively comprise a first permanent magnet and two second permanent magnets which are arranged according to the same polarity sequence. The invention has simple structure and production process and low overall cost.
Description
Technical Field
The invention relates to a linear servo motor, in particular to a flat plate type hybrid permanent magnet linear motor.
Background
In recent years, with the development of an intelligent sorting platform system and the appearance of rare earth permanent magnet materials and the improvement of cost performance, a permanent magnet synchronous linear motor which is high in positioning accuracy, low in heat productivity, high in efficiency, compact in structure, high in response speed and high in safety and reliability is also increasingly applied to a logistics sorting system; due to the characteristics of the logistics line, the linear motor is generally made into a long secondary structure, the secondary embedded with the winding is generally used as a stator, and the primary where the permanent magnet part is located is generally located in the moving part of the logistics sorting moving platform; however, at present, the price of the rare earth permanent magnet material is increased year by year, which invisibly increases the cost of the logistics sorting platform, so in order to reduce the cost of the intelligent sorting platform and improve the control precision of the intelligent sorting platform, it is urgent to research a linear motor with high power density, high positioning precision, safety, reliability and low manufacturing cost.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects of the prior art are overcome, and the flat plate type hybrid permanent magnet linear motor which is safe and reliable and can reduce the whole manufacturing cost is provided.
The technical scheme adopted by the invention for solving the technical problem is as follows:
a flat plate type hybrid permanent magnet linear motor comprises a bottom plate, a motor primary and a motor secondary, wherein a first guide rail is arranged on the front side of the upper end surface of the bottom plate, a second guide rail is arranged on the rear side of the upper end surface of the bottom plate, the left side and the right side of the first guide rail and the second guide rail are respectively provided with a limiting block, a cushion pad is arranged on the surface of each limiting block connected with the first guide rail or the second guide rail, a magnetic grid ruler is arranged on the outer side of the second guide rail, a secondary back plate is arranged on the bottom plate between the first guide rail and the second guide rail, the secondary backboard is provided with the motor secondary, the first guide rail and the second guide rail are respectively provided with two sliding blocks capable of freely sliding on the first guide rail and the second guide rail, the four sliding blocks are jointly provided with the motor primary, and an air gap surface is reserved between the lower end surface of the motor primary and the upper end surface of the motor secondary; the motor primary comprises a primary winding and a primary iron core, the primary iron core is fixed in a primary back plate through a first bolt, the primary winding is arranged inside the primary iron core, and the motor primary is connected with the sliding block through the primary back plate through a second bolt; the motor secondary comprises a first permanent magnet group and a second permanent magnet group, and the first permanent magnet group and the second permanent magnet group are alternately arranged according to different poles and then are tiled and fixed on the upper end surface of the secondary back plate; the first permanent magnet group and the second permanent magnet group respectively comprise a first permanent magnet and two second permanent magnets, the two second permanent magnets are respectively arranged on two sides of the first permanent magnet, and the first permanent magnet and the second permanent magnets are arranged according to the same polarity sequence.
The primary backboard is of a lower end opening type box body structure, openings are formed in the left side face and the right side face of the primary backboard, primary end portion baffles matched with the openings are arranged on the openings, the upper ends of the primary end portion baffles are connected with the primary backboard through third bolts, the front side of the primary backboard is parallel to the first guide rail, the second bolts are used for being connected with the sliding blocks arranged on the first guide rail, the rear side of the primary backboard is parallel to the second guide rail, and the second bolts are used for being connected with the sliding blocks arranged on the second guide rail.
The primary iron core is formed by silicon steel sheets which are overlapped along the z-axis direction; the number of the primary pole slots in the formed primary iron core and the number of the poles in the secondary pole of the motor are matched with the pole slot matching number designed by the motor, and the number of the poles refers to the number of the poles of the secondary pole of the motor covered by the primary winding at each moment; the auxiliary slots are respectively arranged at the left side end and the right side end of the primary iron core, the primary windings are filled in the primary slots and are arranged in a distributed concentrated primary winding mode, and the arrangement mode of the primary windings is A + A-A-A + A-, B + B-and C + C-.
One of the first permanent magnet groups or one of the second permanent magnet groups represents one of the pole numbers.
The magnetic scale of the magnetic grid scale is fixed on the secondary side of the motor, the magnetic head is fixedly connected with the primary side of the motor, and signals collected by the magnetic grid scale are connected with the driver through signal lines, so that the motor is controlled to operate.
The buffer pad is positioned above the first guide rail or the second guide rail and used for preventing the collision of the primary back plate and the limiting block.
The width of the secondary motor is matched with that of the primary motor, and the length of the secondary motor is larger than that of the primary motor.
The magnetic energy product in the first permanent magnet is larger than that in the second permanent magnet, and the magnetic energy product in the first permanent magnet is 40J/m3The magnetic energy product of the second permanent magnet is 3.5J/m3(ii) a The first permanent magnet is a rare earth permanent magnet, and the second permanent magnet is a ferrite permanent magnet.
The invention has the following positive beneficial effects:
1. the invention provides a plate type hybrid permanent magnet linear motor, which is characterized in that a first permanent magnet group and a second permanent magnet group with different polarities are alternately arranged on a secondary back plate, the first permanent magnet group and the second permanent magnet group respectively comprise a first permanent magnet and two second permanent magnets, the two second permanent magnets are respectively arranged on two sides of the first permanent magnet, the first permanent magnet and the second permanent magnets are arranged according to the same polarity sequence, the magnetic energy product in the first permanent magnet is larger than that in the second permanent magnet, and through the arrangement optimization, the air gap magnetic density sine of the motor is better, so that the influence of the tooth space effect of the motor on the positioning force and the thrust fluctuation of the motor is reduced.
2. The second permanent magnet of the ferrite is lower in price than the first permanent magnet of the rare earth permanent magnet, and the second permanent magnet is arranged, so that the electromagnetism of the motor is reasonably optimized, although the total permanent magnet amount is increased, the rare earth permanent magnet is reduced, the manufacturing cost of the motor is reduced to a certain extent, and the effect is more obvious particularly for a long-secondary linear motor.
3. The flat plate type hybrid permanent magnet linear motor provided by the invention has the advantages that the structure and the production process are simple, the iron loss is reduced by the silicon steel sheet lamination in the primary stage of the motor, the utilization rate of the hybrid permanent magnet in the secondary stage of the motor is high, the magnetic conductance of a permanent magnet magnetic circuit is uniform, the positioning force is small, the electric thrust density is high, the eddy current is small, and the whole manufacturing cost of the motor is reduced by the introduction of a ferrite permanent magnet material.
Drawings
Fig. 1 is a schematic structural diagram of a flat hybrid permanent magnet linear motor according to the present invention;
FIG. 2 is a schematic diagram of the arrangement between the motor primary, the motor secondary and the base plate of FIG. 1;
fig. 3 is a structural view of the primary core of fig. 2;
FIG. 4 is a schematic structural diagram of the secondary backing plate of FIG. 1;
FIG. 5 is a schematic view of the structure of the base plate of FIG. 1;
FIG. 6 is a schematic structural diagram of the primary backing plate of FIG. 1;
FIG. 7 is a schematic view of the construction of the primary end baffle of FIG. 1;
FIG. 8 is a schematic diagram of the structure of the restriction block of FIG. 1;
FIG. 9 is a schematic view of a portion of a first permanent magnet set and a second permanent magnet set arranged in an alternating, opposite polarity arrangement;
fig. 10 is a schematic view showing that the first permanent magnet and the second permanent magnet in fig. 9 are arranged in the same order of polarity.
Detailed Description
The invention will be further explained and explained with reference to the drawings and the specific embodiments:
referring to figures 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 of the drawings, wherein: 1-bottom plate, 2-first guide rail, 3-second guide rail, 4-limiting block, 5-buffer pad, 6-magnetic grid ruler, 7-secondary back plate, 8-sliding block, 9-air gap surface, 10-primary winding, 11-primary iron core, 12-primary back plate, 13-second bolt, 14-first permanent magnet group, 15-second permanent magnet group, 16-first permanent magnet, 17-second permanent magnet, 18-primary end baffle, 19-third bolt, 20-first bolt, 21-primary groove, 21-1-first half groove, 21-2-second half groove and 22-auxiliary groove.
Example (b): a flat plate type hybrid permanent magnet linear motor comprises a bottom plate 1, the motor comprises a motor primary and a motor secondary, wherein a first guide rail 2 is arranged on the front side of the upper end face of a bottom plate 1, a second guide rail 3 is arranged on the rear side of the upper end face of the bottom plate, a limiting block 4 is respectively arranged on the left side and the right side of each of the first guide rail 2 and the second guide rail 3, a buffer cushion 5 is arranged on the surface, connected with the first guide rail 2 or the second guide rail 3, of each limiting block 4, a magnetic grid ruler 6 is arranged on the outer side of the second guide rail 3, a secondary back plate 7 is arranged on the bottom plate 1 between the first guide rail 2 and the second guide rail 3, a motor secondary is arranged on the secondary back plate 7, two sliding blocks 8 capable of freely sliding on the first guide rail 2 and the second guide rail 3 are respectively arranged on the first guide rail 2 and the second guide rail 3, a motor primary is jointly arranged on the four sliding blocks 8, and an air; the motor primary comprises a primary winding 10 and a primary iron core 11, the primary iron core 11 is fixed in a primary back plate 12 through a first bolt 20, the primary winding 10 is arranged inside the primary iron core 11, and the motor primary is connected with the sliding block 8 through the primary back plate 12 through a second bolt 13; the motor secondary comprises a first permanent magnet group 14 and a second permanent magnet group 15, and the first permanent magnet group 14 and the second permanent magnet group 15 are alternately arranged according to different poles and then are tiled and fixed on the upper end face of the secondary back plate 7; the first permanent magnet group 14 and the second permanent magnet group 15 respectively include a first permanent magnet 16 and two second permanent magnets 17, the two second permanent magnets 17 are respectively disposed on two sides of the first permanent magnet 16, and the first permanent magnet 16 and the second permanent magnets 17 are arranged in the same polarity sequence.
The primary back plate 12 is of a box body structure with an opening at the lower end, openings are formed in the left side surface and the right side surface of the primary back plate 12, a primary end baffle 18 matched with the openings is arranged on the openings, the upper end of the primary end baffle 18 is connected with the primary back plate 12 through a third bolt 19, the front side of the primary back plate 12 is parallel to the first guide rail 2, the second bolt 13 on the primary back plate is used for being connected with a sliding block arranged on the first guide rail 2, the rear side of the primary back plate 12 is parallel to the second guide rail 3, and the second bolt 13 on the primary back plate is used for being connected with a sliding block arranged on the second guide rail 3.
The primary iron core 11 is formed by silicon steel sheets which are overlapped along the z-axis direction; the number of the primary pole slots 21 in the primary iron core 11 and the number of the poles in the secondary pole of the motor are matched with the designed pole slot matching number of the motor, and the number of the poles refers to the number of the secondary pole of the motor covered by the primary winding 10 at each moment; the two auxiliary slots 22 are respectively arranged at the left side end and the right side end of the primary iron core 11, the primary slots 21 are filled with primary windings 10, the primary windings 10 are arranged in a distributed concentrated manner on the primary windings 10, and the arrangement manner of the primary windings 10 is A + A-A-A + A + A-, B + B-and C + C-.
In the present embodiment, the number of the primary slots 21 is nine, that is, the number of slots corresponding to the number of secondary poles of the motor is nine, wherein one primary slot 21 is divided into two half slots, that is, a first half slot 21-1 and a second half slot 21-2, due to the distributed concentrated winding, and the number of the auxiliary slots 22 at the side end of the primary core 11 is two, where the auxiliary slots 22 are the auxiliary slots 22 added when the motor is optimally designed; the number of poles of the secondary of the motor is ten, and here, the number of poles refers to the number of poles of the secondary of the motor covered by the primary winding 10 at each moment.
One first permanent magnet group 14 or one second permanent magnet group 15 represents one pole number.
The magnetic scale of the magnetic grid scale 6 is fixed on the secondary side of the motor, the magnetic head is fixedly connected with the primary side of the motor, and the signal collected by the magnetic grid scale 6 is connected with the driver through a signal wire, so that the motor is controlled to operate.
The cushion 5 is located above the first rail 2 or the second rail 3 for preventing the primary back plate 12 from colliding with the stopper 4.
The width of the secondary motor is matched with that of the primary motor, and the length of the secondary motor is larger than that of the primary motor.
The magnetic energy product in the first permanent magnet 16 is larger than that in the second permanent magnet 17, and the magnetic energy product in the first permanent magnet 16 is 40J/m3The magnetic energy product of the second permanent magnet 17 is 3.5J/m3(ii) a The first permanent magnet 16 is a rare earth permanent magnet and the second permanent magnet 17 is a ferrite permanent magnet.
When the linear motor is operated, the linear motor is connected with a driver, related parameters such as motor polar distance, speed and the like are set in the driver, the motor is started, the magnetic grid ruler 6 transmits collected position signals to the driver, the primary motor is controlled to do circular reciprocating motion above the secondary motor by utilizing the guide rail, the sliding block 8, the buffer pad 5 and the limiting block 4, after the primary motor slides to a limited position on one side of the guide rail, the driver controls the primary motor to move in a direction opposite to the previous moving direction until the primary motor moves to a fixed position on the other side of the guide rail, and at the moment, the driver controls the primary motor to move in a direction opposite to the previous moving direction, so that the driver controls the primary motor to do reciprocating motion on.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (8)
1. The utility model provides a plate mixes permanent magnet linear electric motor, includes that bottom plate, motor are elementary and the motor is secondary, its characterized in that: a first guide rail is arranged on the front side of the upper end face of the bottom plate, a second guide rail is arranged on the rear side of the upper end face of the bottom plate, a limiting block is arranged on each of the left side and the right side of each of the first guide rail and the second guide rail, a cushion pad is arranged on each limiting block and on the connection face of the limiting block with the first guide rail or the second guide rail, a magnetic grid ruler is arranged on the outer side of each second guide rail, a secondary back plate is arranged on the bottom plate between the first guide rail and the second guide rail, a motor secondary is arranged on each secondary back plate, two sliding blocks capable of freely sliding on the first guide rail and the second guide rail are arranged on each of the first guide rail and the second guide rail, a motor primary is arranged on each of the four sliding blocks, and an air gap surface is reserved between the lower end face of the motor primary and the upper end face of; the motor primary comprises a primary winding and a primary iron core, the primary iron core is fixed in a primary back plate through a first bolt, the primary winding is arranged inside the primary iron core, and the motor primary is connected with the sliding block through the primary back plate through a second bolt; the motor secondary comprises a first permanent magnet group and a second permanent magnet group, and the first permanent magnet group and the second permanent magnet group are alternately arranged according to different polarities and then are tiled and fixed on the upper end surface of the secondary back plate; the first permanent magnet group and the second permanent magnet group respectively comprise a first permanent magnet and two second permanent magnets, the two second permanent magnets are respectively arranged on two sides of the first permanent magnet, and the first permanent magnet and the second permanent magnets are arranged according to the same polarity sequence.
2. A flat-plate hybrid permanent magnet linear motor according to claim 1, wherein: the primary backboard is of a lower end opening type box body structure, openings are formed in the left side face and the right side face of the primary backboard, primary end portion baffles matched with the openings are arranged on the openings, the upper ends of the primary end portion baffles are connected with the primary backboard through third bolts, the front side of the primary backboard is parallel to the first guide rail, the second bolts are used for being connected with the sliding blocks arranged on the first guide rail, the rear side of the primary backboard is parallel to the second guide rail, and the second bolts are used for being connected with the sliding blocks arranged on the second guide rail.
3. A flat-plate hybrid permanent magnet linear motor according to claim 2, wherein: the primary iron core is formed by silicon steel sheets which are overlapped along the z-axis direction; the number of the primary pole slots in the formed primary iron core and the number of the poles in the secondary pole of the motor are matched with the pole slot matching number designed by the motor, and the number of the poles refers to the number of the poles of the secondary pole of the motor covered by the primary winding at each moment; the auxiliary slots are respectively arranged at the left side end and the right side end of the primary iron core, the primary windings are filled in the primary slots and are arranged in a distributed concentrated primary winding mode, and the arrangement mode of the primary windings is A + A-A-A + A-, B + B-and C + C-.
4. A flat hybrid permanent magnet linear motor according to claim 3, wherein: one of the first permanent magnet groups or one of the second permanent magnet groups represents one of the pole numbers.
5. A flat-plate hybrid permanent magnet linear motor according to claim 1, wherein: the magnetic scale of the magnetic grid scale is fixed on the secondary side of the motor, the magnetic head is fixedly connected with the primary side of the motor, and signals collected by the magnetic grid scale are connected with the driver through signal lines, so that the motor is controlled to operate.
6. A flat-plate hybrid permanent magnet linear motor according to claim 1, wherein: the buffer pad is positioned above the first guide rail or the second guide rail and used for preventing the collision of the primary back plate and the limiting block.
7. A flat-plate hybrid permanent magnet linear motor according to claim 1, wherein: the width of the secondary motor is matched with that of the primary motor, and the length of the secondary motor is larger than that of the primary motor.
8. A flat-plate hybrid permanent magnet linear motor according to claim 1, wherein: the magnetic energy product in the first permanent magnet is greater than the magnetic energy product in the second permanent magnet.
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CN202011337870.XA CN112701873A (en) | 2020-11-25 | 2020-11-25 | Plate type hybrid permanent magnet linear motor |
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CN202011337870.XA CN112701873A (en) | 2020-11-25 | 2020-11-25 | Plate type hybrid permanent magnet linear motor |
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Cited By (2)
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CN114498967A (en) * | 2022-01-17 | 2022-05-13 | 中车青岛四方机车车辆股份有限公司 | Permanent magnet fixing structure, permanent magnet fixing method, permanent magnet motor and vehicle |
CN115173667A (en) * | 2022-07-26 | 2022-10-11 | 河北工业大学 | Double-side modular short primary permanent magnet transverse flux linear motor |
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CN114498967A (en) * | 2022-01-17 | 2022-05-13 | 中车青岛四方机车车辆股份有限公司 | Permanent magnet fixing structure, permanent magnet fixing method, permanent magnet motor and vehicle |
CN114498967B (en) * | 2022-01-17 | 2024-02-20 | 中车青岛四方机车车辆股份有限公司 | Permanent magnet fixing structure, permanent magnet fixing method, permanent magnet motor and vehicle |
CN115173667A (en) * | 2022-07-26 | 2022-10-11 | 河北工业大学 | Double-side modular short primary permanent magnet transverse flux linear motor |
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Application publication date: 20210423 |