CN112436710A - Rotor structure of cylindrical moving-magnet linear motor - Google Patents

Rotor structure of cylindrical moving-magnet linear motor Download PDF

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Publication number
CN112436710A
CN112436710A CN202011231777.0A CN202011231777A CN112436710A CN 112436710 A CN112436710 A CN 112436710A CN 202011231777 A CN202011231777 A CN 202011231777A CN 112436710 A CN112436710 A CN 112436710A
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CN
China
Prior art keywords
magnetic
magnetic shoe
shoe
tile
auxiliary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011231777.0A
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Chinese (zh)
Inventor
田集斌
李昊璘
许发铎
水龙
孙述泽
孔令轩
李生华
罗新奎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lanzhou Institute of Physics of Chinese Academy of Space Technology
Original Assignee
Lanzhou Institute of Physics of Chinese Academy of Space Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lanzhou Institute of Physics of Chinese Academy of Space Technology filed Critical Lanzhou Institute of Physics of Chinese Academy of Space Technology
Priority to CN202011231777.0A priority Critical patent/CN112436710A/en
Publication of CN112436710A publication Critical patent/CN112436710A/en
Pending legal-status Critical Current

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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K41/00Propulsion 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
    • H02K41/02Linear motors; Sectional motors
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/02Details of the magnetic circuit characterised by the magnetic material
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/34Reciprocating, oscillating or vibrating parts of the magnetic circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K41/00Propulsion 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
    • H02K41/02Linear motors; Sectional motors
    • H02K41/03Synchronous motors; Motors moving step by step; Reluctance motors
    • H02K41/031Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type

Abstract

The invention discloses a rotor structure of a cylindrical moving-magnet linear motor, which is characterized in that two groups of main magnetic shoes and two groups of auxiliary magnetic shoes are opposite in polarity and are axially arranged at intervals, so that the stroke of the reciprocating motion of the rotor of the motor can be controlled by the magnetic spring effect in the process of the linear reciprocating motion of the rotor of the motor, the motor operates stably, and the stroke overrun protection effect is achieved; meanwhile, the magnetic shoe is fixed between the fixing rods in an embedding mode, so that the failure phenomena of falling and the like which possibly occur in the traditional bonding and fixing mode under the environments of high temperature, vibration and the like are avoided, and the reliability and the service life of the motor are effectively prolonged.

Description

Rotor structure of cylindrical moving-magnet linear motor
Technical Field
The invention belongs to the technical field of permanent magnet linear motors, and particularly relates to a rotor structure of a cylindrical moving magnet type linear motor.
Background
The Stirling generator is a power generation system which is coupled by a Stirling heat engine and a generator and converts heat energy into electric energy, the Stirling heat engine converts the heat energy into mechanical energy through a Stirling cycle to push a piston to reciprocate, and the generator converts the mechanical energy of the piston motion into the electric energy through the conversion of a motion mechanism. If a rotary motor is used, the linear reciprocating motion of the piston needs to be converted into rotary motion by an intermediate conversion device, and the introduction of the intermediate conversion device reduces the energy transfer efficiency and affects the control accuracy of the system. The linear motor can be directly coupled with the motion of the piston, a middle transmission mechanism is omitted, the efficiency and the control precision of the system can be improved, and meanwhile the reliability of the system is also improved. However, the existing linear motor still has the problems of low power and reliability and the like.
Disclosure of Invention
In view of this, the invention provides a rotor structure of a cylindrical moving-magnet linear motor, which realizes a high-power and high-reliability linear motor.
The invention provides a rotor structure of a cylindrical moving-magnet linear motor, which comprises a magnetic shoe tank front pressing plate 1, a plurality of main magnetic shoes 3, a plurality of auxiliary magnetic shoes 2, a plurality of magnetism isolating gaskets 4, a magnetic shoe tank tail end flange 5 and a plurality of magnetic shoe embedding fixing rods 6, wherein the magnetic shoe tank front pressing plate is provided with a plurality of magnetic shoe tanks;
the magnetic shoe embedding and fixing rods 6 are fixedly arranged on the same side of the flange 5 at the tail end of the magnetic shoe tank, so that the outer surface of each magnetic shoe embedding and fixing rod is positioned on the same circumference; the two symmetrical side surfaces of the magnetic shoe embedded and connected with the fixed rod 6 are both provided with grooves;
the outer surfaces of the main magnetic shoe 3 and the auxiliary magnetic shoe 2 are arc-shaped, and the polarities of the main magnetic shoe 3 and the auxiliary magnetic shoe 2 are opposite; the main magnetic shoe 3 and the auxiliary magnetic shoe 2 are embedded between the two magnetic shoe embedding fixing rods 6 through the grooves and distributed along the circumferential direction; the main magnetic shoe 3 and the auxiliary magnetic shoe 2 are distributed at intervals along the axial direction, and the adjacent main magnetic shoe 3 and the auxiliary magnetic shoe 2 are separated by the magnetic isolation gasket 4; the outer surface of the magnetic isolation gasket 4 is arc-shaped, and the magnetic isolation gasket 4 is embedded between the magnetic shoe embedding fixing rods 6;
the magnetic tile tank front pressing plate 1 is connected with the magnetic tile scarf joint fixing rod 6, and the magnetic tile tank front pressing plate 1 is used for limiting the main magnetic tile 3 and the auxiliary magnetic tile 2.
Further, the axial dimension of the main magnetic shoe 3 is larger than the axial dimension of the auxiliary magnetic shoe 2.
Further, the main magnetic shoe 3 and the auxiliary magnetic shoe 2 are magnetized in a radial magnetizing mode.
Furthermore, the main magnetic shoe 3 and the auxiliary magnetic shoe 2 are both in non-equal radius arc structures, the outer arc surface of the main magnetic shoe 3 is an N/S pole surface, and the outer arc surface of the auxiliary magnetic shoe 2 is an S/N pole surface.
Further, the main magnetic shoe 3 and the auxiliary magnetic shoe 2 are both formed by cutting sintered neodymium iron boron materials.
Further, the magnetic shoe tank front pressing plate 1, the magnetic shoe tank tail end flange 5 and the plurality of magnetic shoe scarf joint fixing rods 6 are all made of titanium alloy.
Further, the magnetic spacer 4 is made of an aluminum alloy.
Has the advantages that:
1. according to the invention, through the structure that the two groups of main magnetic shoes and the two groups of auxiliary magnetic shoes are opposite in polarity and are axially arranged at intervals, the stroke of the mover reciprocating motion of the motor can be controlled through the magnetic spring effect in the linear reciprocating motion process of the motor mover, so that the motor runs stably, and the stroke overrun protection effect is achieved; meanwhile, the magnetic shoe is fixed between the fixing rods in an embedding mode, so that the failure phenomena of falling and the like which possibly occur in the traditional bonding and fixing mode under the environments of high temperature, vibration and the like are avoided, and the reliability and the service life of the motor are effectively prolonged.
2. According to the invention, an optimized combination mode is found through the optimization of the axial sizes of the main magnetic shoe and the auxiliary magnetic shoe, the maximum power output of the motor under the same envelope size is realized, and the power density is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of a mover structure of a cylindrical moving-magnet linear motor according to the present invention.
Fig. 2 is a cross-sectional structural view of a cylindrical moving-magnet linear motor according to the present invention.
Fig. 3 is a perspective view of a cylindrical moving-magnet linear motor according to the present invention.
Wherein, 1-the front pressure plate of the magnetic shoe tank, 2-the auxiliary magnetic shoe, 3-the main magnetic shoe, 4-the magnetic isolation gasket, 5-the flange at the tail end of the magnetic shoe tank, 6-the magnetic shoe is embedded and connected with the fixed rod.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a rotor structure of a cylindrical moving magnet type linear motor, which comprises a magnetic tile tank front pressing plate 1, a plurality of main magnetic tiles 3, a plurality of auxiliary magnetic tiles 2, a plurality of magnetic isolation gaskets 4, a magnetic tile tank tail end flange 5 and a plurality of magnetic tile embedding fixing rods 6 as shown in figure 1.
Wherein, a plurality of magnetic shoe scarf joint fixed rods 6 are all fixedly arranged on the same side of a flange 5 at the tail end of the magnetic shoe tank, and as shown in figure 3, the outer surface of each magnetic shoe scarf joint fixed rod is positioned on the same circumference; the two symmetrical side surfaces of the magnetic shoe embedded and connected with the fixed rod 6 are both provided with grooves.
The outer surfaces of the main magnetic tile 3 and the auxiliary magnetic tile 2 are arc-shaped, and the polarities of the main magnetic tile 3 and the auxiliary magnetic tile 2 are opposite; the main magnetic shoe 3 and the auxiliary magnetic shoe 2 are embedded between the two magnetic shoe embedding fixed rods 6 through the grooves and distributed along the circumferential direction, as shown in fig. 2; the auxiliary magnetic shoes 2 are distributed on two sides of the main magnetic shoe 3 along the axial direction, and the axial size of the main magnetic shoe 3 is larger than that of the auxiliary magnetic shoes 2; the adjacent main magnetic tile 3 and the auxiliary magnetic tile 2 are separated by a magnetic isolation gasket 4; the outer surface of the magnetic isolation gasket 4 is arc-shaped, and the magnetic isolation gasket 4 is embedded between the magnetic shoe embedding fixing rods 6.
In the invention, the magnetic isolation gasket can be made of aluminum alloy and plays a role in magnetic isolation.
The magnetic tile tank front pressing plate 1 is connected with the magnetic tile scarf joint fixing rod 6, and the magnetic tile tank front pressing plate 1 limits the main magnetic tile 3 and the auxiliary magnetic tile 2.
In the invention, each magnetic tile, including the main magnetic tile and the auxiliary magnetic tile, can be cut and molded by sintered neodymium iron boron materials and is of an arc structure with unequal radius, the magnetizing mode is radial magnetizing, the outer arc surface of the main magnetic tile is an N/S pole surface, the outer arc surface of the auxiliary magnetic tile is an S/N pole surface, and the polarities of the main magnetic tile and the auxiliary magnetic tile are opposite.
In order to keep the axial central position of the motor rotor, the main magnetic shoe is large in axial size and is a main source of an air gap magnetic field, and the auxiliary magnetic shoe is small in axial size and can generate axial positioning force through the way of coupling.
The structural member of active cell structure, including magnetic shoe jar front press plate 1, magnetic shoe jar tail end flange 5 and a plurality of magnetic shoe scarf joint dead lever 6 all can be made by titanium alloy to guarantee structural strength and alleviate motor active cell quality, be favorable to high frequency operation.
For example, the arc-shaped magnetic shoe is embedded between 12 fixed rods to form a cylindrical structure, 4 magnetic shoes, two main magnetic shoes and two auxiliary magnetic shoes are arranged between every two fixed rods, and a magnetic isolation gasket is arranged between each main magnetic shoe and each auxiliary magnetic shoe for isolation. The main magnetic tiles are divided into two groups, each group comprises 12 sheets, and the main magnetic tiles are respectively embedded between the fixed rods to form a closed ring. The auxiliary magnetic tiles are divided into two groups, each group comprises 12 pieces, and the auxiliary magnetic tiles are respectively embedded among the 12 fixing rods to form a closed ring.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A rotor structure of a cylindrical moving-magnet linear motor is characterized by comprising a magnetic shoe tank front pressing plate (1), a plurality of main magnetic shoes (3), a plurality of auxiliary magnetic shoes (2), a plurality of magnetism isolating gaskets (4), a magnetic shoe tank tail end flange (5) and a plurality of magnetic shoe embedding fixing rods (6);
the magnetic shoe embedding fixing rods (6) are fixedly arranged on the same side of the flange (5) at the tail end of the magnetic shoe tank, so that the outer surface of each magnetic shoe embedding fixing rod is positioned on the same circumference; two symmetrical side surfaces of the magnetic shoe embedded and connected with the fixed rod (6) are respectively provided with a groove;
the outer surfaces of the main magnetic tile (3) and the auxiliary magnetic tile (2) are arc-shaped, and the polarities of the main magnetic tile (3) and the auxiliary magnetic tile (2) are opposite; the main magnetic shoe (3) and the auxiliary magnetic shoe (2) are embedded between the two magnetic shoe embedding fixing rods (6) through the grooves and distributed along the circumferential direction; the main magnetic shoes (3) and the auxiliary magnetic shoes (2) are distributed at intervals along the axial direction, and the adjacent main magnetic shoes (3) and the adjacent auxiliary magnetic shoes (2) are separated by the magnetic isolation gasket (4); the outer surface of the magnetic isolation gasket (4) is arc-shaped, and the magnetic isolation gasket (4) is embedded between the magnetic shoe embedding fixing rods (6);
the magnetic tile tank front pressing plate (1) is connected with the magnetic tile embedding fixing rod (6), and the magnetic tile tank front pressing plate (1) is used for limiting the main magnetic tile (3) and the auxiliary magnetic tile (2).
2. The mover structure according to claim 1, characterized in that the axial dimension of the main magnetic tiles (3) is larger than the axial dimension of the sub magnetic tiles (2).
3. The mover structure of claim 1, wherein the main magnetic tiles (3) and the auxiliary magnetic tiles (2) are magnetized by radial magnetization.
4. The mover structure according to claim 1, wherein the main magnetic shoe (3) and the auxiliary magnetic shoe (2) are both non-equal radius arc structures, the outer arc surface of the main magnetic shoe (3) is an N/S pole surface, and the outer arc surface of the auxiliary magnetic shoe (2) is an S/N pole surface.
5. The mover structure according to claim 4, characterized in that the main magnetic tile (3) and the auxiliary magnetic tile (2) are both cut and formed of sintered NdFeB material.
6. The mover structure according to claim 1, wherein the magnetic shoe tank front pressing plate (1), the magnetic shoe tank tail end flange (5) and the plurality of magnetic shoe scarf joint fixing rods (6) are all made of titanium alloy.
7. The mover structure according to claim 1, characterized in that the magnetic spacer (4) is made of an aluminum alloy.
CN202011231777.0A 2020-11-06 2020-11-06 Rotor structure of cylindrical moving-magnet linear motor Pending CN112436710A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011231777.0A CN112436710A (en) 2020-11-06 2020-11-06 Rotor structure of cylindrical moving-magnet linear motor

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Application Number Priority Date Filing Date Title
CN202011231777.0A CN112436710A (en) 2020-11-06 2020-11-06 Rotor structure of cylindrical moving-magnet linear motor

Publications (1)

Publication Number Publication Date
CN112436710A true CN112436710A (en) 2021-03-02

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940008740U (en) * 1992-09-16 1994-04-21 삼성전자주식회사 Permanent magnet fixing device for motor rotor
JPH06311721A (en) * 1993-04-21 1994-11-04 Canon Inc Linear motor device
JPH11252837A (en) * 1998-02-26 1999-09-17 Shibaura Mechatronics Corp Pump motor
KR20000021850A (en) * 1998-09-30 2000-04-25 구자홍 Linear motor with the operating structure
JP2000228855A (en) * 1999-02-08 2000-08-15 Sanyo Electric Co Ltd Moving magnet linear motor
FR2910194A1 (en) * 2006-12-15 2008-06-20 Valeo Equip Electr Moteur Six pole type electrical rotating machine i.e. direct drive starter, for motor vehicle, has stator including permanent magnets and support integrated to magnets, where number of magnets is greater than number of poles of machine
CN103986248A (en) * 2013-02-11 2014-08-13 罗伯特·博世有限公司 Rare earth ring magnet having means for receiving foreign particles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR940008740U (en) * 1992-09-16 1994-04-21 삼성전자주식회사 Permanent magnet fixing device for motor rotor
JPH06311721A (en) * 1993-04-21 1994-11-04 Canon Inc Linear motor device
JPH11252837A (en) * 1998-02-26 1999-09-17 Shibaura Mechatronics Corp Pump motor
KR20000021850A (en) * 1998-09-30 2000-04-25 구자홍 Linear motor with the operating structure
JP2000228855A (en) * 1999-02-08 2000-08-15 Sanyo Electric Co Ltd Moving magnet linear motor
FR2910194A1 (en) * 2006-12-15 2008-06-20 Valeo Equip Electr Moteur Six pole type electrical rotating machine i.e. direct drive starter, for motor vehicle, has stator including permanent magnets and support integrated to magnets, where number of magnets is greater than number of poles of machine
CN103986248A (en) * 2013-02-11 2014-08-13 罗伯特·博世有限公司 Rare earth ring magnet having means for receiving foreign particles

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