CN202076918U - Low positioning force high thrust linear switch magnetic flux permanent magnet motor - Google Patents
Low positioning force high thrust linear switch magnetic flux permanent magnet motor Download PDFInfo
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- CN202076918U CN202076918U CN2011202176664U CN201120217666U CN202076918U CN 202076918 U CN202076918 U CN 202076918U CN 2011202176664 U CN2011202176664 U CN 2011202176664U CN 201120217666 U CN201120217666 U CN 201120217666U CN 202076918 U CN202076918 U CN 202076918U
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- 230000004907 flux Effects 0.000 title claims abstract description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 21
- 238000004804 winding Methods 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 230000001360 synchronised effect Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 210000004489 deciduous teeth Anatomy 0.000 description 3
- 229910000976 Electrical steel Inorganic materials 0.000 description 2
- QJVKUMXDEUEQLH-UHFFFAOYSA-N [B].[Fe].[Nd] Chemical compound [B].[Fe].[Nd] QJVKUMXDEUEQLH-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005405 multipole Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
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Abstract
The utility model discloses a linear flat-type switch magnetic flux permanent magnet motor, which comprises a secondary stator and a primary mover, wherein the primary mover comprises U-shaped iron cores, the cross sections of which are shaped as Us, permanent magnets, non-magnetizer intervals, magnetic conductive bridges and a primary three-phase winding, non-magnetizer intervals with the same thickness are arranged between each two adjacent U-shaped iron cores, the magnetic conductive bridges are arranged at the tops of the U-shaped iron cores, two permanent magnets having the same thickness and opposite magnetizing directions are arranged between two U-shaped iron cores in the same phase and a magnetic conductive bridge, a surface of the secondary stator which is directly facing the primary mover is provided with poles and grooves which can be precisely positioned and controlled by a controller capable of being driven by sine wave current, and gaps are formed between the U-shaped iron cores of the primary mover and a secondary mover. The permanent magnet motor is used in a direct driving AC transmission system, with no intermediate transmission structure or speed change gear needed. The permanent magnet motor can be used as a feeding driving system direct driving motor of a numerical control machine tool, and can also be used in a translation transmission system having a positioning function.
Description
Technical Field
The utility model is used for translation transmission or lathe that have the location requirement feed fields such as drive, relate to a novel straight line flat switch magnetic flow permanent magnet motor, specifically speaking are low location dynamic high thrust linear switch magnetic flow permanent magnet motor.
Background
At present, high-grade numerical control machines adopting linear motors as feed driving motors are becoming technical hotspots of the industry more and more. The reason is that along with the increasing requirements of speed, acceleration, precision and working stroke in the machining process, the traditional feeding mode of the rotary servo motor and the ball screw is limited in the aspect of improving various performances, and the linear motor has great potential in the aspect of improving various performances. However, due to the existence of the edge effect of the linear motor, the thrust fluctuation is large due to the uneven magnetic field during operation. And because the linear motor is directly connected with the processing cutter, the disturbance and the friction force of the external load can be directly transmitted to the linear motor. This requires higher dynamic performance and stability of the feed drive system, including the linear motor, and places greater demands on the design and manufacture of the linear motor.
The sine wave linear permanent magnet motor has high power density and high control performance, so that the sine wave linear permanent magnet motor becomes the first choice of the linear motor for feed driving. However, the permanent magnets mounted on the long secondary stator are more in number and higher in cost, which is not favorable for popularization and application of the linear motor, so that the switched reluctance linear motor with low manufacturing cost also becomes one of the choices in the field. The defects of the switched reluctance linear motor are obvious, the thrust fluctuation is large during the operation, and the mechanical noise is always an unsolved problem. In recent years, a doubly salient motor with permanent magnets has been well developed, and particularly, a flux switching type permanent magnet motor has the advantages of a permanent magnet synchronous motor and a switched reluctance motor, and is greatly concerned in the industry.
Disclosure of Invention
The utility model aims at providing a simple structure, thrust are big, the low straight line flat plate magnetic flow of positioning force switches permanent-magnet motor. The motor is used in a direct-drive alternating-current transmission system, and an intermediate transmission structure and a speed change device are not needed. The motor can be used as a direct drive motor of a feeding drive system of a numerical control machine tool, and can also be applied to a translation transmission system with a positioning function.
The purpose of the utility model is realized through the following technical scheme:
a linear flat plate type switch magnetic flux permanent magnet motor is characterized in that: the motor comprises a secondary stator and a primary rotor, wherein the primary rotor comprises a U-shaped iron core with a U-shaped section, a permanent magnet, a non-magnetic conductor interval, a magnetic conducting bridge and a primary three-phase winding; non-magnetic conductive body intervals with the same thickness are arranged between two adjacent U-shaped iron cores, a magnetic conductive bridge is arranged at the top of each U-shaped iron core, and two permanent magnets with the same thickness and opposite magnetizing directions are arranged between the two U-shaped iron cores and the magnetic conductive bridge in the same phase; the secondary stator is provided with a pole and a groove which can be precisely positioned and controlled by a controller driven by sine wave current on the surface facing the primary rotor; an air gap is arranged between the U-shaped iron core of the primary rotor and the rotor of the secondary rotor.
The utility model discloses in, elementary pitchτ tDistance from secondary poleτ pSpacing between phases, p and secondary pole pitchτ pThe following requirements are met:
wherein m is an integer;
and n is an integer, so that the motor has large output force and small positioning force, and can be precisely positioned and controlled by a controller driven by sine wave current.
The U-shaped iron core is formed by laminating silicon steel sheets. The permanent magnets are made of neodymium iron boron materials, the magnetizing direction of the permanent magnets enables the magnetic potential of the permanent magnets in the same phase to be connected in series, and the surrounding directions of magnetic fluxes of magnetic circuits of adjacent phases are opposite. A set of structurally identical poles and slots are uniformly distributed on the secondary stator toward the air gap side.
The secondary stator can be processed by a whole block of alloy with better magnetic conductivity; each primary phase winding occupies two winding slots, and a single-layer concentrated winding mode is adopted.
The utility model discloses in, whole motor is plate structure, and the U type iron core of elementary active cell, non-magnetizer interval and three-phase winding are located the below of active cell, lay two permanent magnets that magnetize opposite direction, thickness are the same between two U type iron core tops of homophase and the both ends of magnetic conduction bridge. The surfaces of the secondary stator, which are opposite to the teeth of the primary rotor, are provided with poles with equal intervals, and an air gap is reserved between the primary rotor and the secondary stator.
The primary tooth pitch between the primary slot number and the secondary pole number of the linear flat plate type switch magnetic flux permanent magnet motorτ tDistance from secondary poleτ pAnd phase spacing ρ and secondary pole pitchτ pThe motor has a definite quantity relationship, so that various performances of the motor are optimized, and the motor is suitable for a low-speed and high-thrust precise transmission system.
The permanent magnet of the linear motor is made of neodymium iron boron materials, the magnetizing direction of the permanent magnet enables the magnetic potential of the permanent magnet in the same phase to be connected in series, and the magnetizing and placing modes of the permanent magnet in the adjacent phases are opposite in the surrounding direction of the permanent magnet flux.
The utility model has the advantages as follows:
1. the direct connection drives, does not need the middle transmission structure, reduces middle mechanical loss, improves system reliability and stability.
2. Compared with a linear permanent magnet synchronous motor with the same purpose, the linear permanent magnet synchronous motor has equivalent thrust density and lower manufacturing cost; compared with a linear switch reluctance motor with the same application, the linear switch reluctance motor has higher thrust density and equivalent manufacturing cost.
3. The primary teeth/grooves and the secondary poles/grooves are optimally designed, so that the positioning force is reduced, the magnetic field harmonic waves are reduced, and the positioning accuracy of the motor is improved.
4. The permanent magnet and the winding are arranged on the primary, so that heat dissipation and cooling are facilitated, the output of the motor is improved, the service life of the motor is prolonged, and the permanent magnet is simple to arrange and process.
5. The secondary is a single magnetizer pole/groove structure, and has simple and reliable structure and low processing cost.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a longitudinal sectional view and a dimension marking schematic view of the motor.
Detailed Description
The utility model provides a novel straight line flat switch magnetic flow permanent-magnet machine, including primary 21, permanent magnet 22, magnetic conduction bridge 24, non-magnetic conduction interval 23, three-phase winding 3, secondary active cell 1 and air gap 4, as shown in figure 1. The whole motor is of a flat plate type structure, and two permanent magnets with opposite magnetizing directions are arranged between two U-shaped iron cores with the same phase and two ends of a magnetic conduction bridge to form a closed magnetic circuit. The primary three-phase winding is embedded in the U-shaped groove of the primary iron core in a single-layer concentrated winding mode, and the air gap is located between the primary winding and the secondary winding of the motor. The primary iron core can be formed by laminating silicon steel sheets, and the secondary stator air gap side is of a U-shaped pole and groove structure with the same interval and can be formed by processing a whole block of alloy with better magnetic conductivity.
In order to meet the requirement that the three-phase windings mutually differ by 120 electrical angles, the space distance of each phase winding of the primary rotor is
Wherein n is an integer, and fig. 2 is a longitudinal sectional view and a dimension labeling diagram of the motor. Wherein,τ tin order to be the primary pitch of the teeth,τ pis the secondary pole pitch and p is the phase pitch. N =6 in fig. 2;τ pfor the secondary pole pitch, the length of one secondary pole pitch corresponds to 360 electrical degrees of the machine, i.e. one secondary pole of the machine corresponds to a pair of poles of a permanent magnet synchronous machine. According to the fractional slot principle, if the primary slot number is 6, the secondary pole number can be selected to be 1, 5, 7, 11, 13, 17, 19, 23 … …. In order to obtain larger thrust density and lower synchronous speed, the linear motor adopts a few-slot multi-pole structure, and the motor shown in figure 1 is a 6-slot/17-pole motor. The working speed range is determined by the number of slots/poles and the pole distance, and the number of slots/poles and the pole distance of the secondary of the motor can be selected according to actual requirements in practical application.
In order to minimize the positioning force of the linear motor, the pitch of the primary rotor is optimized by adopting a magnetic conductance modulation principle. Electromotive primary tooth pitch τ shown in fig. 1tFrom the secondary pole by a distance τpSatisfies the following relationship:
where m is an integer, m =1 in the motor shown in fig. 1.
When the linear flat plate type switching magnetic flux permanent magnet motor meeting the dimensional relation is driven and controlled, an inverter of a sine wave current control mode can be used for driving and controlling. The operation principle of the linear motor can be equivalent to the working principle of a permanent magnet synchronous linear motor, and the linear motor has extremely small pole distance, so that higher positioning precision can be achieved during control.
Claims (3)
1. A linear flat plate type switch magnetic flux permanent magnet motor is characterized in that: the motor comprises a secondary stator (1) and a primary rotor (2), wherein the primary rotor (2) comprises a U-shaped iron core (21) with a U-shaped section, a permanent magnet (22), a non-magnetic-conductive interval (23), a magnetic conductive bridge (24) and a primary three-phase winding (3); a non-magnetic conductive magnet interval (23) with the same thickness is arranged between two adjacent U-shaped iron cores (21), a magnetic conductive bridge (24) is arranged at the top of the U-shaped iron core (21), and two permanent magnets (22) with the same thickness and opposite magnetizing directions are arranged between two U-shaped iron cores (2.1) of the same phase and the magnetic conductive bridge (24); the secondary stator (1) is provided with a pole (11) and a groove (12) which can be driven by sine wave current to carry out precise positioning control by a controller on the surface facing the primary rotor (2); an air gap (4) is arranged between the U-shaped iron core (21) of the primary mover (2) and the secondary mover (1).
2. The linear plate switch flux permanent magnet motor of claim 1, wherein: primary pitchτ tDistance from secondary poleτ pSpacing between phases, p and secondary pole pitchτ pThe following requirements are met:
wherein m is an integer;
wherein n is an integer.
3. The linear plate switch flux permanent magnet motor of claim 1, wherein: a group of poles (11) and slots (12) with the same structure are uniformly distributed on the secondary stator (1) and face to the side of the air gap (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202176664U CN202076918U (en) | 2011-06-24 | 2011-06-24 | Low positioning force high thrust linear switch magnetic flux permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202176664U CN202076918U (en) | 2011-06-24 | 2011-06-24 | Low positioning force high thrust linear switch magnetic flux permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202076918U true CN202076918U (en) | 2011-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202176664U Expired - Lifetime CN202076918U (en) | 2011-06-24 | 2011-06-24 | Low positioning force high thrust linear switch magnetic flux permanent magnet motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202076918U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255471A (en) * | 2011-06-24 | 2011-11-23 | 江苏中容电气有限公司 | Linear switch magnetic flux permanent magnet motor with low location force and high thrust |
| CN105720784A (en) * | 2016-04-13 | 2016-06-29 | 邹宇 | Symmetric double-sided permanent magnet assisted linear switch reluctance motor |
-
2011
- 2011-06-24 CN CN2011202176664U patent/CN202076918U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255471A (en) * | 2011-06-24 | 2011-11-23 | 江苏中容电气有限公司 | Linear switch magnetic flux permanent magnet motor with low location force and high thrust |
| CN105720784A (en) * | 2016-04-13 | 2016-06-29 | 邹宇 | Symmetric double-sided permanent magnet assisted linear switch reluctance motor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111214 Effective date of abandoning: 20130227 |
|
| RGAV | Abandon patent right to avoid regrant |