CN112165234A - Three-rotor moving-magnet type permanent magnet linear oscillation motor - Google Patents
Three-rotor moving-magnet type permanent magnet linear oscillation motor Download PDFInfo
- Publication number
- CN112165234A CN112165234A CN202010973124.3A CN202010973124A CN112165234A CN 112165234 A CN112165234 A CN 112165234A CN 202010973124 A CN202010973124 A CN 202010973124A CN 112165234 A CN112165234 A CN 112165234A
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- Prior art keywords
- permanent magnet
- rotor
- motor
- magnetic ring
- linear oscillation
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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
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K33/00—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system
- H02K33/16—Motors with reciprocating, oscillating or vibrating magnet, armature or coil system with polarised armatures moving in alternate directions by reversal or energisation of a single coil system
-
- 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
- H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
- H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention relates to a three-rotor moving-magnet type permanent magnet linear oscillation motor. The permanent magnet linear oscillation motor solves the problems that the electromagnetic thrust of the permanent magnet linear oscillation motor in the existing structure is too small and the output of the electromagnetic thrust is unstable. The technical scheme of the invention comprises a motor rotor and a motor stator; the rotor comprises a permanent magnet magnetic ring, a permanent magnet bracket and a piston shaft; the stator comprises an inner stator iron core, an outer stator iron core and an armature winding, wherein the armature winding is of a single-phase structure and is fixed inside the outer stator iron core, the single neodymium iron boron permanent magnet ring is formed by connecting 4 fan-shaped magnet units which are arranged along the circumferential direction, and the magnetizing direction is radial magnetizing; the magnetizing directions of the three neodymium iron boron permanent magnets are sequentially changed by 180 degrees, and the three neodymium iron boron permanent magnets are relatively and parallelly fixed in the permanent magnet support mounting groove. The invention changes the single rotor permanent magnet into the three-rotor permanent magnet structure, and can effectively improve the amplitude and the stability of the air gap magnetic field of the moving magnet type linear oscillation motor, thereby improving the stability of permanent magnet linear oscillation electromagnetic thrust and electromagnetic thrust output.
Description
Technical Field
The invention belongs to the technical field of electromechanical engineering, and relates to a three-rotor moving-magnet type permanent magnet linear oscillation motor.
Background
The permanent magnet linear oscillation motor can be divided into three basic structures of a moving coil type, a moving iron type and a moving magnet type according to a moving part;
the armature winding of the moving coil type is easy to break in the high-frequency movement process;
the moving iron type rotor iron core silicon steel sheet has large inertia, which is not beneficial to the long-term high-frequency reciprocating motion of the motor;
the moving-magnet type permanent magnet support is made of non-metal materials, the rotor is light in weight, and dynamic response performance is good.
Therefore, the moving magnet type permanent magnet linear oscillation motor is adopted to drive the piston in the compressor to do linear reciprocating motion, and the performance and efficiency of the refrigeration equipment are effectively improved.
The traditional single-rotor moving-magnet type permanent magnet linear oscillation motor has the advantages that the rotor is light in weight, simple and compact in structure and convenient to install and maintain, but the thrust output of the motor is not stable and the thrust is small in the high-frequency motion process, so that the use requirements of people on high efficiency and long durability of the operation of a compressor cannot be met.
The current method for solving the problems is to optimize the magnetic field by changing the structure of the rotor, generally increasing the number of permanent magnets of the rotor, and magnetizing the permanent magnets in the radial direction. However, in actual production operation, the existing magnetizing technology is difficult to accurately perform radial magnetization on the whole circular ring neodymium iron boron permanent magnet, the circular ring neodymium iron boron permanent magnet needs to be divided into a plurality of magnet unit structures for radial magnetization, the magnetizing difficulty is reduced, but repulsion acting force exists between adjacent magnet units, so that the installation is difficult, and actual operation is difficult to realize. Therefore, the stability of the motor thrust and the thrust output is improved by optimizing the rotor structure of the permanent magnet linear oscillation motor, but the difficulty of the assembly process is reduced as much as possible, and the problems to be solved at present are solved.
Disclosure of Invention
In view of this, the invention provides a three-rotor moving-magnet type permanent magnet linear oscillation motor to solve the problems of too small electromagnetic thrust and unstable electromagnetic thrust output of the permanent magnet linear oscillation motor in the existing structural form.
In order to solve the problems in the prior art, the technical scheme of the invention is as follows: three active cell move magnetic formula permanent magnetism linear oscillation motor, including the motor frame, be provided with piston shaft, its characterized in that in the through-hole of motor frame: the piston shaft is coaxially provided with a motor rotor and a motor stator;
the motor rotor comprises a permanent magnet support, three neodymium iron boron permanent magnet magnetic rings which are alternately distributed according to N-S poles in the radial magnetizing direction are arranged on the permanent magnet support, the permanent magnet magnetic rings are an auxiliary rotor magnetic ring, a main magnetic ring and an auxiliary magnetic ring, the magnetizing direction of the main magnetic ring is outwards radiated along the axis, and the magnetizing direction of the auxiliary magnetic ring is inwards radiated along the axis;
the motor stator comprises an armature winding and an inner stator iron core, wherein the armature winding is a single-phase annular coil and is fixedly arranged in the outer stator iron core, and the inner stator iron core is sleeved in the permanent magnet support.
Furthermore, the main magnetic ring is a driving rotor, and the axial length of the driving rotor is equal to 1/2 of the sum of the lengths of the two stator tooth parts and the gap of the notch of the outer stator core.
Furthermore, the auxiliary rotor magnetic ring and the auxiliary magnetic ring are auxiliary rotors, the magnetic poles of the two auxiliary rotors are opposite, and the axial length of the auxiliary rotors is equal to that of the driving rotors.
Further, the radial thickness of the permanent magnet magnetic ring is 4-6 mm.
Compared with the prior art, the invention has the following advantages:
the invention relates to a three-rotor moving-magnet type linear oscillating motor, which changes a single rotor structure into a three-rotor structure, and enables magnetic lines of force of left and right auxiliary rotors and magnetic lines of force of a main rotor to form a closed loop at a main air gap through three rotor permanent magnets with axial lengths of two stator electromagnetic iron magnetic poles and 1/2 of the length of a slot gap and radial magnetizing N-S-level alternate distribution, so that the amplitude and the stability of an air gap magnetic field of the moving-magnet type linear oscillating motor can be effectively improved, the electromagnetic thrust of the moving-magnet type permanent magnet linear oscillating motor is improved, and the motor can stably output the electromagnetic thrust within an effective stroke range.
Description of the drawings:
FIG. 1 is a schematic cross-sectional view of a three-rotor moving-magnet type permanent magnet linear oscillation motor according to the present invention;
FIG. 2 is a sectional view of a three-rotor structure of a three-rotor moving-magnet type permanent magnet linear oscillation motor according to the present invention;
FIG. 3 is a schematic diagram of the distribution of magnetic lines of force in an N-S magnetic pole alternating array of a three-rotor moving-magnet type permanent magnet linear oscillating motor according to the present invention;
description of the labeling: 1-piston shaft, 2-permanent magnet support, 3-permanent magnet magnetic ring, 4-outer stator core, 5-armature winding, 6-outer stator core fixing support, 7-inner stator core, 301-auxiliary rotor magnetic ring, 302-main magnetic ring and 303-auxiliary magnetic ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1, the present invention provides a three-mover moving-magnet type permanent magnet linear oscillation motor, which includes a motor stator and a motor mover, wherein the motor stator and the motor mover are arranged coaxially;
the motor stator comprises an armature winding 5 and an inner stator core 7, wherein the armature winding 5 is a single-phase annular coil and is fixed inside an outer stator core 4, the outer stator core 4 is fixed on the inner stator core 7 through an outer stator core fixing support 6 through a long bolt, and the inner stator core 7 is sleeved in a permanent magnet support 2 and mainly plays a role in magnetic conduction.
The motor rotor comprises a permanent magnet support 2, three neodymium iron boron permanent magnet magnetic rings 3 are arranged on the permanent magnet support 2, and a through hole in the bottom of the motor support is connected with a piston connecting shaft 1 in a matched mode; the permanent magnet magnetic ring 3 is divided into a main rotor magnetic ring (a main magnetic ring 302) and an auxiliary rotor magnetic ring (a finger auxiliary magnetic ring 303 and an auxiliary rotor magnetic ring 301), and the magnetizing directions of the main rotor magnetic ring and the auxiliary rotor magnetic ring are respectively outward radiation along the axis and inward radiation along the axis.
The armature winding 5 is charged with single-phase alternating current, an excitation magnetic field generated by the permanent magnet and a traveling wave magnetic field generated by the armature winding interact to generate alternating electromagnetic thrust, and the motor rotor linearly reciprocates along the axis direction under the action of a power supply and a control system.
As shown in FIG. 2, three rotor permanent magnet rings 3 (an auxiliary rotor magnetic ring 301, a main magnetic ring 302 and an auxiliary magnetic ring 303) are arranged closely and alternately distributed and fixed on a permanent magnet support 2 according to N-S levels in the radial magnetizing direction, and the radial thickness is 4-6 mm. The main magnetic ring 302 is arranged in the middle of the outer stator core 4, the axial length of the main rotor is equal to 1/2 of the sum of the gap lengths of the two stator teeth and the two slots of the outer stator core, and the axial length of the auxiliary rotor is equal to the axial length of the main rotor. The magnetic ring magnetizing comprises an auxiliary rotor magnetic ring 301 radiating and magnetizing inwards along the axis, a main magnetic ring 302 radiating and magnetizing outwards along the axis, and an auxiliary magnetic ring 303 radiating and magnetizing inwards along the axis in sequence.
As shown in fig. 3, the principle of enhancing the air-gap magnetic field by the three-rotor magnetic pole array is that the interaction between the main rotor magnetic pole and the auxiliary rotor magnetic pole can effectively increase the magnetic field intensity between the air gaps and improve the utilization rate of the magnetic ring, and the usage amount of the permanent magnets is less than that of single-stage arrangement under the effect that the N-S magnetic pole alternate distribution array of the three-rotor structure achieves the same air-gap magnetic field intensity, so that the usage amount of the permanent magnets can.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and it should be noted that those skilled in the art should make modifications and variations without departing from the principle of the present invention.
Claims (4)
1. Three active cell move magnetic formula permanent magnetism linear oscillation motor, including the motor frame, be provided with piston shaft (1), its characterized in that in the through-hole of motor frame: a motor rotor and a motor stator are coaxially arranged on the piston shaft (1);
the motor rotor comprises a permanent magnet support (2), three neodymium iron boron permanent magnet magnetic rings (3) which are alternately distributed according to N-S poles in the radial magnetizing direction are arranged on the permanent magnet support (2), the permanent magnet magnetic rings (3) are an auxiliary rotor magnetic ring (301), a main magnetic ring (302) and an auxiliary magnetic ring (303), the magnetizing direction of the main magnetic ring (302) is outwards radiated along the axis, and the magnetizing direction of the auxiliary magnetic ring (303) is inwards radiated along the axis;
the motor stator comprises an armature winding (5) and an inner stator iron core (7), wherein the armature winding (5) is a single-phase annular coil and is fixedly arranged in the outer stator iron core (4), and the inner stator iron core (7) is sleeved in the permanent magnet support (2).
2. The three-mover moving magnet type permanent magnet linear oscillation motor according to claim 1, characterized in that: the main magnetic ring (302) is a driving rotor, and the axial length of the driving rotor is equal to 1/2 of the sum of the gap lengths of the two stator tooth parts and the notch of the outer stator core (4).
3. The three-mover moving magnet type permanent magnet linear oscillation motor according to claim 1 or 2, characterized in that: the auxiliary rotor magnetic ring (301) and the auxiliary magnetic ring (303) are auxiliary rotors, the magnetic poles of the two auxiliary rotors are opposite, and the axial length of the auxiliary rotors is equal to that of the main rotors.
4. The three-mover moving magnet type permanent magnet linear oscillation motor according to claim 3, characterized in that: the radial thickness of the permanent magnet magnetic ring (3) is 4-6 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010973124.3A CN112165234A (en) | 2020-09-16 | 2020-09-16 | Three-rotor moving-magnet type permanent magnet linear oscillation motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010973124.3A CN112165234A (en) | 2020-09-16 | 2020-09-16 | Three-rotor moving-magnet type permanent magnet linear oscillation motor |
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| Publication Number | Publication Date |
|---|---|
| CN112165234A true CN112165234A (en) | 2021-01-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010973124.3A Pending CN112165234A (en) | 2020-09-16 | 2020-09-16 | Three-rotor moving-magnet type permanent magnet linear oscillation motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117674494A (en) * | 2023-03-31 | 2024-03-08 | 比亚迪股份有限公司 | Linear motor, suspension system and vehicle |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834510A (en) * | 2010-05-21 | 2010-09-15 | 浙江大学 | Moving-magnet type transverse flux linear oscillatory motor for direct-drive compressor |
| CN103516172A (en) * | 2012-06-21 | 2014-01-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet linear motor and compressor having permanent magnet linear motor |
| CN103560639A (en) * | 2013-11-20 | 2014-02-05 | 东南大学 | High power factor linear reciprocating oscillation motor |
| CN108233668A (en) * | 2018-02-22 | 2018-06-29 | 方舟 | A kind of moving-magnetic type linear motor |
| US20180258921A1 (en) * | 2015-05-11 | 2018-09-13 | Lg Electronics Inc. | Reciprocating compressor |
| US20190245424A1 (en) * | 2018-02-07 | 2019-08-08 | Lg Electronics Inc. | Linear motor and linear compressor having the same |
-
2020
- 2020-09-16 CN CN202010973124.3A patent/CN112165234A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101834510A (en) * | 2010-05-21 | 2010-09-15 | 浙江大学 | Moving-magnet type transverse flux linear oscillatory motor for direct-drive compressor |
| CN103516172A (en) * | 2012-06-21 | 2014-01-15 | 珠海格力节能环保制冷技术研究中心有限公司 | Permanent magnet linear motor and compressor having permanent magnet linear motor |
| CN103560639A (en) * | 2013-11-20 | 2014-02-05 | 东南大学 | High power factor linear reciprocating oscillation motor |
| US20180258921A1 (en) * | 2015-05-11 | 2018-09-13 | Lg Electronics Inc. | Reciprocating compressor |
| US20190245424A1 (en) * | 2018-02-07 | 2019-08-08 | Lg Electronics Inc. | Linear motor and linear compressor having the same |
| CN108233668A (en) * | 2018-02-22 | 2018-06-29 | 方舟 | A kind of moving-magnetic type linear motor |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117674494A (en) * | 2023-03-31 | 2024-03-08 | 比亚迪股份有限公司 | Linear motor, suspension system and vehicle |
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Application publication date: 20210101 |
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