CN116073627A - Direct-indirect composite water-cooling conical permanent magnet linear synchronous motor and cooling method - Google Patents

Direct-indirect composite water-cooling conical permanent magnet linear synchronous motor and cooling method Download PDF

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Publication number
CN116073627A
CN116073627A CN202310158896.5A CN202310158896A CN116073627A CN 116073627 A CN116073627 A CN 116073627A CN 202310158896 A CN202310158896 A CN 202310158896A CN 116073627 A CN116073627 A CN 116073627A
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China
Prior art keywords
permanent magnet
shell
primary
iron core
direct
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CN202310158896.5A
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CN116073627B (en
Inventor
谭强
闫顺天
王新邦
黄旭珍
李静
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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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
    • 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K5/00Casings; Enclosures; Supports
    • H02K5/04Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K9/00Arrangements for cooling or ventilating
    • H02K9/19Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2201/00Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/03Machines characterised by aspects of the air-gap between rotor and stator

Abstract

The invention relates to a direct-indirect composite water-cooling conical permanent magnet linear synchronous motor and a cooling method, wherein the direct-indirect composite water-cooling conical permanent magnet linear synchronous motor comprises a primary structure and a secondary structure which are matched with each other, and the primary structure comprises the following components: the primary iron core is "V" setting, is equipped with the tooth's socket on the primary iron core, and winding coil nests in the tooth's socket, and the shell is half cladding structure, opens in the shell has a plurality of through water course, and through water course sets up along lateral wall, the inner wall of shell, secondary structure includes: the support structure is used as a reference, one side of the support structure facing the primary structure is in a V-shaped concave, the support structure is matched with the V-shaped bulge of the primary structure, the secondary iron core is positioned on the inclined plane of the support structure, and the permanent magnet is positioned on one side of the secondary iron core, which is close to the primary structure, and is close to the winding coil. The invention increases the air gap area and improves the magnetic load of the motor; meanwhile, a cladding cooling mode is adopted, so that the heat dissipation and heat insulation capacity is enhanced, and the thrust density of the motor is increased.

Description

Direct-indirect composite water-cooling conical permanent magnet linear synchronous motor and cooling method
Technical Field
The invention relates to the technical field of linear motors, in particular to a direct-indirect composite water-cooling conical permanent magnet linear synchronous motor and a cooling method.
Background
According to the principle of electromechanical energy conversion, when the number of poles of the stator (primary) and the number of poles of the rotor (secondary) are the same, the output torque or thrust of the motor is basically determined by the air gap area.
The power of the motor is also related to the rotating speed, so that the frequency of the magnetic field change of the stator and the rotor of the motor is increased, namely the rotating speed of the motor is increased, and the power of the motor can be increased.
However, a linear motor used in conventional electric power transmission has a low frequency of magnetic field change compared to a high-speed rotating electric machine, and is limited in terms of its structure and the like as a direct-drive system, and it is difficult to increase the power density of the linear motor by increasing the frequency of magnetic field change of the motor. Therefore, to make linear motor systems advantageous in terms of power and force performance, it is only desirable to increase the thrust density of the motor.
Disclosure of Invention
Aiming at the defects in the prior production technology, the applicant provides a direct-indirect composite water-cooling conical permanent magnet linear synchronous motor with reasonable structure and a cooling method, and the primary and secondary coupling air gap area of the motor is increased by adopting a V-shaped air gap, so that the magnetic load of the motor is improved; meanwhile, a cladding cooling mode is adopted, so that the heat dissipation and heat insulation capacity is enhanced, and the thrust density of the motor is increased.
The technical scheme adopted by the invention is as follows:
a direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor, comprising a primary structure and a secondary structure which are mutually matched, wherein the primary structure comprises:
the primary iron core is arranged in a V shape, a tooth slot is arranged on the primary iron core,
winding coils are nested in tooth grooves,
a shell which is of a semi-cladding structure, a plurality of straight-through water channels are arranged in the shell, the straight-through water channels are arranged along the side wall and the inner wall of the shell,
the secondary structure comprises:
the supporting structure is used as a benchmark, one side of the supporting structure facing the primary structure is in a V-shaped concave shape and is matched with the V-shaped convex shape of the primary structure,
a secondary iron core positioned on the inclined plane of the supporting structure,
and the permanent magnet is positioned at one side of the secondary iron core, which is close to the primary structure, and is close to the winding coil.
As a further improvement of the above technical scheme:
the shell comprises a top shell and side shells positioned at two sides of the top shell; the top surface shell protrudes towards one side of the primary iron core to form a V-shaped structure;
and reinforcing ribs are connected between the two side surface shells and are arranged into a V shape which is attached to the inclined surface of the primary iron core.
The primary iron core is concave near one side of the top surface shell, a plurality of silicon steel sheets perpendicular to the top surface shell are arranged on one side of the primary iron core, which is away from the top surface shell, and tooth grooves for accommodating winding coils are formed between two adjacent silicon steel sheets.
The section of each group of winding coils in the axial direction of the motor is V-shaped, and the section of each winding coil perpendicular to the axial direction of the motor is closed-loop; one winding coil is nested on one piece of silicon steel sheet.
The two sides of the top surface shell, which are close to the side surface shell, are fixed mounting positions; the top surface shell is provided with a built-in straight-through water channel near the V-shaped surface.
The side housing is provided with a built-in straight-through water channel along the V-shaped end of the winding coil.
The permanent magnet includes:
the first permanent magnet group is positioned at the V-shaped concave point of the supporting structure,
the second permanent magnet group and the third permanent magnet group are symmetrically arranged on two sides of the first permanent magnet group and fall on a V-shaped inclined plane of the supporting structure.
The longitudinal widths of the permanent magnet monomers of the first permanent magnet group, the second permanent magnet group and the third permanent magnet group are the same, and the magnetizing direction of the permanent magnet formed by the permanent magnet monomers is vertical to the upper surface of the secondary iron core.
The first permanent magnet group, the second permanent magnet group and the third permanent magnet group respectively comprise a plurality of permanent magnet monomers, two sides of a single permanent magnet monomer of the first permanent magnet group are respectively correspondingly attached to single permanent magnet monomers of the second permanent magnet group and single permanent magnet monomers of the third permanent magnet group, and the magnetizing directions of the three mutually attached permanent magnet monomers are kept the same or the same; the magnetizing directions of two adjacent rows of permanent magnet monomer groups arranged along the axial direction of the motor are opposite.
A method for cooling a direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor, for cooling the direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor according to claim 1, comprising the steps of:
forming a V-shaped air gap after the linear synchronous motor is assembled;
cooling fluid is led into the straight-through water channels of the side surface shell and the top surface shell, and the cooling fluid in the side surface shell flows to be contacted with the end part of the V-shaped structure of the winding coil so as to realize direct heat transfer; the cooling fluid in the top surface shell is close to the primary iron core, and the primary iron core transfers heat between the V-shaped concave surface of the winding coil and the V-shaped convex surface of the top surface shell, so that indirect heat transfer is realized.
The beneficial effects of the invention are as follows:
the invention has compact and reasonable structure and large cooling area, and the components are arranged in a V shape, so that the primary and secondary of the motor form a V-shaped air gap, the V-shaped structure increases the air gap area compared with the conventional flat PMLSM structure, and the thrust density of the motor is improved from the aspect of increasing the magnetic flux area of the winding turn chain;
the winding coil is manufactured by adopting an AM technology, is suitable for a primary conical groove structure of a motor, realizes maximization of the groove filling rate, and improves the thrust density of the motor from the aspect of increasing the electric load;
in the invention, the water-cooling shell is coated and manufactured by adopting an AM technology, so that the primary conformal cooling purpose of the motor is realized; the side water channel and the winding end part directly transfer heat, and the top water channel and the winding indirectly transfer heat through the iron core, so that the heat-insulating material has high-efficiency heat dissipation and strong surface heat insulation performance;
drawings
Fig. 1 is a schematic diagram of the overall structure of the present invention.
Fig. 2 is a schematic view of the primary core structure of the present invention.
Fig. 3 is a schematic view of a winding coil structure according to the present invention.
Fig. 4 is a schematic view of the structure of the side housing and the reinforcing rib of the present invention.
Fig. 5 is a schematic view of the top shell structure of the present invention.
Fig. 6 is a schematic view of the permanent magnet structure of the present invention.
Wherein: 1. a primary structure; 2. a secondary structure; 3. a straight-through water channel;
11. a primary iron core; 12. a winding coil; 13. a housing; 13-1, a top housing; 13-2, side shells; 13-2-1, reinforcing ribs;
21. a secondary core; 22. a permanent magnet; 23. and a support structure.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings.
As shown in fig. 1 to 6, the direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor of the present embodiment includes a primary structure 1 and a secondary structure 2 that are mutually matched, and the primary structure 1 includes:
the primary iron core 11 is arranged in a V shape, tooth sockets are arranged on the primary iron core 11,
the winding coil 12, nested in the slot,
a shell 13 with a semi-cladding structure, a plurality of through water channels 3 are arranged in the shell 13, the through water channels 3 are arranged along the side wall and the inner wall of the shell 13,
the secondary structure 2 comprises:
the support structure 23, as a reference, the side of the support structure 23 facing the primary structure 1 presents a "V" -shaped recess, adapted to the "V" -shaped projection of the primary structure 1,
the secondary core 21, which is located on the inclined surface of the support structure 23,
the permanent magnet 22 is located on the side of the secondary core 21 close to the primary structure 1, and is close to the winding coil 12.
The housing 13 includes a top housing 13-1, side housings 13-2 located on both sides of the top housing 13-1; the top surface shell 13-1 protrudes to form a V-shaped structure from one side of the primary iron core 11;
the reinforcing ribs 13-2-1 are connected between the two side shells 13-2, and the reinforcing ribs 13-2-1 are arranged in a V shape which is attached to the inclined surface of the primary iron core 11.
The primary iron core 11 is concave near one side of the top surface shell 13-1, a plurality of silicon steel sheets perpendicular to the top surface shell 13-1 are arrayed on one side of the primary iron core 11 away from the top surface shell 13-1, and tooth grooves for accommodating the winding coils 12 are formed between two adjacent silicon steel sheets.
Each group of winding coils 12 has a V-shaped section in the axial direction of the motor, and the section of each winding coil 12 perpendicular to the axial direction of the motor is in a closed ring shape; one winding coil 12 is nested on one sheet of silicon steel.
The two sides of the top surface shell 13-1, which are close to the side surface shell 13-2, are fixed mounting positions; the top surface shell 13-1 is provided with a built-in straight-through water channel 3 near the V-shaped surface.
The side housing 13-2 is provided with a built-in straight-through water channel 3 along the "V" shaped end of the winding coil 12.
The permanent magnet 22 includes:
the first permanent magnet group, located in the "V" shaped pits of the support structure 23,
the second permanent magnet group and the third permanent magnet group are symmetrically arranged on two sides of the first permanent magnet group and fall on the V-shaped inclined plane of the supporting structure 23.
The longitudinal widths of the permanent magnet monomers of the first permanent magnet group, the second permanent magnet group and the third permanent magnet group are the same, and the magnetizing direction of the permanent magnet 22 formed by the permanent magnet groups is vertical to the upper surface of the secondary iron core 21.
The first permanent magnet group, the second permanent magnet group and the third permanent magnet group respectively comprise a plurality of permanent magnet monomers, two sides of a single permanent magnet monomer of the first permanent magnet group are respectively correspondingly attached to single permanent magnet monomers of the second permanent magnet group and single permanent magnet monomers of the third permanent magnet group, and the magnetizing directions of the three mutually attached permanent magnet monomers are kept the same or the same; the magnetizing directions of two adjacent rows of permanent magnet monomer groups arranged along the axial direction of the motor are opposite.
The cooling method of the direct-indirect composite water-cooling conical permanent magnet linear synchronous motor of the embodiment is used for cooling the direct-indirect composite water-cooling conical permanent magnet linear synchronous motor of claim 1, and comprises the following steps:
forming a V-shaped air gap after the linear synchronous motor is assembled;
cooling fluid is led into the straight-through water channel 3 of the side surface shell 13-2 and the top surface shell 13-1, and the cooling fluid in the side surface shell 13-2 flows to be contacted with the end part of the V-shaped structure of the winding coil 12 so as to realize direct heat transfer; the cooling fluid in the top housing 13-1 is adjacent to the primary core 11, and the primary core 11 transfers heat between the "V" shaped concave surface of the winding coil 12 and the "V" shaped convex surface of the top housing 13-1, thereby achieving indirect heat transfer.
The invention has the following specific structure and working principle:
as shown in fig. 1, the primary structure and the secondary structure constitute a linear synchronous motor, and referring to fig. 2 and 3 in combination, the primary structure includes a primary core, a winding coil 12, and a housing 13.
The primary iron core 11 is provided with tooth grooves, and is formed by transversely stacking silicon steel sheets along the motor, the longitudinal section of the primary iron core 11 is V-shaped, and the winding coil 12 is nested on teeth formed by the silicon steel sheets of the primary iron core 11.
The housing 13 is divided into a side housing 13-2 and a top housing 13-1, and the side housing 13-2 and the top housing 13-1 are connected by bolts at circular hole positions as shown in fig. 4 and 5.
Referring to fig. 1, 4 and 5 in combination, a plurality of through waterways 3 are opened in each of the side and top housings 13-2 and 13-1, and each of the through waterways 3 maintains the same cross-sectional area. The straight-through water channel 3 of the top surface shell 13-1 is arranged at the V-shaped inclined plane of the top surface shell 13-1.
As shown in fig. 4, the side housing 13-2 contains reinforcing ribs 13-2-1 for supporting the primary core and for conducting heat, and has a longitudinal width of not more than 2mm and a normal height of less than half of the normal height of the teeth of the primary core. The reinforcing rib 13-2-1 has a V-shaped longitudinal section and is arranged in the gap between two adjacent winding coils 12.
As shown in fig. 1 and 6, the secondary structure 2 includes a secondary iron core 21, permanent magnets 22 and a supporting structure 23, the secondary iron core 21 is made of solid carbon steel, the longitudinal cross section is V-like, the permanent magnets 22 are divided into three groups of left, middle and right along the transverse direction, the longitudinal widths of the three groups of permanent magnets 22 are the same, and all the permanent magnets are attached to the upper surface of the secondary iron core 21, wherein the longitudinal cross sections of the left and right groups of permanent magnets 22 are rectangular, the longitudinal cross section of the middle group of permanent magnets 22 tends to be isosceles triangle, the three groups of permanent magnets 22 are tightly spliced along the transverse direction, and the side surfaces are in the same plane.
The magnetizing direction of the permanent magnet 22 is perpendicular to the upper surface of the secondary core 21;
the magnetizing directions of the three closely contacted permanent magnets 22 are kept upward or downward simultaneously, the magnetizing directions of the longitudinally adjacent permanent magnets 22 are opposite, and the supporting structure 23 is positioned below the secondary iron core 21, and the longitudinal section of the supporting structure is triangular.
In the invention, the winding coil and the shell of the primary structure 1 are processed and manufactured by adopting additive manufacturing technology.
The linear synchronous motor primary 1 and secondary 2 structure of the invention ensures that the upper surfaces of the left and right groups of permanent magnets 22 of the secondary are parallel to the lower surface of the primary iron core 11 in the assembly process, and the distances between the upper surfaces of the permanent magnets 22 on the left and right sides and the lower surface of the primary iron core 11 are equal. After assembly, the longitudinal section of the air gap between the primary 1 and the secondary 2 is V-shaped, and compared with the air gap area of a conventional motor, the air gap area of the motor is obviously increased, but the volume change is not great; meanwhile, the motor provided by the invention is also provided with a plurality of cooling surfaces, so that the cooling efficiency is improved, the heat dissipation and heat insulation capabilities are enhanced, the thrust density of the motor is further increased, and finally the motor power is improved.
The above description is intended to illustrate the invention and not to limit it, the scope of which is defined by the claims, and any modifications can be made within the scope of the invention.

Claims (10)

1. The utility model provides a direct-indirect compound water-cooling toper permanent magnetism linear synchronous motor, includes primary structure (1) and secondary structure (2) that mutually support, its characterized in that: the primary structure (1) comprises:
the primary iron core (11) is arranged in a V shape, tooth grooves are arranged on the primary iron core (11),
winding coils (12) nested in the tooth slots,
a shell (13) with a semi-cladding structure, a plurality of through water channels (3) are arranged in the shell (13), the through water channels (3) are arranged along the side wall and the inner wall of the shell (13),
the secondary structure (2) comprises:
the supporting structure (23) is used as a benchmark, one side of the supporting structure (23) facing the primary structure (1) is in a V-shaped concave, and is matched with the V-shaped bulge of the primary structure (1),
a secondary core (21) positioned on the inclined plane of the supporting structure (23),
the permanent magnet (22) is positioned on one side of the secondary iron core (21) close to the primary structure (1) and is close to the winding coil (12).
2. The direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor of claim 1, wherein: the shell (13) comprises a top shell (13-1) and side shells (13-2) positioned at two sides of the top shell (13-1); the top surface shell (13-1) protrudes towards one side of the primary iron core (11) to form a V-shaped structure;
the reinforcing ribs (13-2-1) are connected between the two side surface shells (13-2), and the reinforcing ribs (13-2-1) are arranged to be in a V shape which is attached to the inclined surface of the primary iron core (11).
3. The direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor of claim 2, wherein: one side of the primary iron core (11) close to the top surface shell (13-1) is concave, a plurality of silicon steel sheets perpendicular to the top surface shell (13-1) are arrayed on one side of the primary iron core (11) away from the top surface shell (13-1), and tooth grooves for accommodating winding coils (12) are formed between two adjacent silicon steel sheets.
4. A direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor as claimed in claim 3, wherein: the section of each group of winding coils (12) in the axial direction of the motor is in a V shape, and the section of each winding coil (12) perpendicular to the axial direction of the motor is in a closed ring shape; a winding coil (12) is nested on a sheet of silicon steel.
5. The direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor of claim 2, wherein: the two sides of the top surface shell (13-1) close to the side surface shell (13-2) are fixed mounting positions; the top surface shell (13-1) is provided with a built-in straight-through water channel (3) near the V-shaped surface.
6. The direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor of claim 5, wherein: the side shell (13-2) is provided with a built-in straight-through water channel (3) along the V-shaped end part of the winding coil (12).
7. The direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor of claim 1, wherein: the permanent magnet (22) comprises:
the first permanent magnet group is positioned at the V-shaped concave point of the supporting structure (23),
the second permanent magnet group and the third permanent magnet group are symmetrically arranged on two sides of the first permanent magnet group and fall on a V-shaped inclined plane of the supporting structure (23).
8. The direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor of claim 7, wherein: the longitudinal widths of the permanent magnet monomers of the first permanent magnet group, the second permanent magnet group and the third permanent magnet group are the same, and the magnetizing direction of the permanent magnet (22) formed by the permanent magnet groups is vertical to the upper surface of the secondary iron core (21).
9. The direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor of claim 8, wherein: the first permanent magnet group, the second permanent magnet group and the third permanent magnet group respectively comprise a plurality of permanent magnet monomers, two sides of a single permanent magnet monomer of the first permanent magnet group are respectively correspondingly attached to single permanent magnet monomers of the second permanent magnet group and single permanent magnet monomers of the third permanent magnet group, and the magnetizing directions of the three mutually attached permanent magnet monomers are kept the same or the same; the magnetizing directions of two adjacent rows of permanent magnet monomer groups arranged along the axial direction of the motor are opposite.
10. A method for cooling a direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor, which is characterized by being used for cooling the direct-indirect composite water-cooled tapered permanent magnet linear synchronous motor according to claim 1, and comprising the following steps:
forming a V-shaped air gap after the linear synchronous motor is assembled;
cooling fluid is led into the straight-through water channels (3) of the side surface shell (13-2) and the top surface shell (13-1), and the cooling fluid in the side surface shell (13-2) flows to be in contact with the end part of the V-shaped structure of the winding coil (12) so as to realize direct heat transfer; the cooling fluid in the top surface shell (13-1) is close to the primary iron core (11), and the primary iron core (11) transfers heat between the V-shaped concave surface of the winding coil (12) and the V-shaped convex surface of the top surface shell (13-1) to realize indirect heat transfer.
CN202310158896.5A 2023-02-23 2023-02-23 Direct-indirect composite water-cooling conical permanent magnet linear synchronous motor and cooling method Active CN116073627B (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6075297A (en) * 1995-12-20 2000-06-13 Minolta Co., Ltd. Linear motor
CN107786058A (en) * 2016-08-30 2018-03-09 上海微电子装备(集团)股份有限公司 Linear electric motors
CN110401324A (en) * 2019-07-26 2019-11-01 中车株洲电力机车有限公司 A kind of line inductance electromotor system and its control method
CN111669025A (en) * 2020-06-30 2020-09-15 西安工业大学 double-V-shaped coreless permanent magnet synchronous linear motor
CN112072888A (en) * 2020-08-31 2020-12-11 珠海格力电器股份有限公司 Linear motor
CN212572345U (en) * 2020-07-13 2021-02-19 雅科贝思精密机电(南通)有限公司 Integral cooling structure system of linear motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6075297A (en) * 1995-12-20 2000-06-13 Minolta Co., Ltd. Linear motor
CN107786058A (en) * 2016-08-30 2018-03-09 上海微电子装备(集团)股份有限公司 Linear electric motors
CN110401324A (en) * 2019-07-26 2019-11-01 中车株洲电力机车有限公司 A kind of line inductance electromotor system and its control method
CN111669025A (en) * 2020-06-30 2020-09-15 西安工业大学 double-V-shaped coreless permanent magnet synchronous linear motor
CN212572345U (en) * 2020-07-13 2021-02-19 雅科贝思精密机电(南通)有限公司 Integral cooling structure system of linear motor
CN112072888A (en) * 2020-08-31 2020-12-11 珠海格力电器股份有限公司 Linear motor

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