CN116545210A - Cylindrical permanent magnet linear synchronous motor - Google Patents
Cylindrical permanent magnet linear synchronous motor Download PDFInfo
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- CN116545210A CN116545210A CN202310623247.8A CN202310623247A CN116545210A CN 116545210 A CN116545210 A CN 116545210A CN 202310623247 A CN202310623247 A CN 202310623247A CN 116545210 A CN116545210 A CN 116545210A
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- synchronous motor
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- 229910001172 neodymium magnet Inorganic materials 0.000 description 2
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Classifications
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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
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/21—Devices for sensing speed or position, or actuated thereby
- H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
- H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
- H02K11/25—Devices for sensing temperature, or actuated thereby
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K2207/00—Specific aspects not provided for in the other groups of this subclass relating to arrangements for handling mechanical energy
- H02K2207/03—Tubular motors, i.e. rotary motors mounted inside a tube, e.g. for blinds
Abstract
The invention discloses a cylindrical permanent magnet linear synchronous motor, which comprises a stator, a rotor and a connecting rod; the stator is provided with a cylindrical stator shell, a stator winding comprising a plurality of pairs of poles is arranged in the stator shell around a circle, a traveling wave magnetic field for driving the rotor is formed around a hollow channel of the stator shell, the rotor is assembled in the hollow channel of the stator shell around which the stator winding surrounds in a sliding mode, a plurality of groups of rotor permanent magnets which are magnetized in the axial direction are packaged in the rotor, the connecting rod is connected with the rotor and extends out of the stator from the hollow channel of the stator shell, the traveling wave magnetic field formed by the rotor through the stator winding moves linearly in the axial direction in the hollow channel of the stator shell, and the linear motion is output through the connecting rod. The cylindrical permanent magnet linear motor provided by the invention has the advantages of compact structure, stable and reliable motor output and high control precision, and is suitable for the fields requiring high-speed, high-efficiency and precise linear driving, such as numerical control machine tools, semiconductor equipment, 3C lithium battery equipment, medical equipment and the like.
Description
Technical Field
The invention discloses a cylindrical permanent magnet linear synchronous motor, and belongs to the technical field of motors.
Background
Along with the high-speed development of automatic control technology, the requirement on the positioning precision of various motion executing structures is higher, and a driving element for realizing linear motion comprises a cylinder and a linear driving component combined by a rotating motor and a ball screw, wherein the cylinder has quick action response, but is difficult to realize accurate positioning control, and has larger noise; the traditional linear motion driving device formed by the rotating motor and the ball screw has complex structure and higher cost.
With the appearance of the linear motor, the linear motor has better choice for driving the linear motion, and the linear motor can be considered as a rotary motor which is split along the radial direction of the rotary motor and then leveled and evolved, but under the modern control system which needs high speed and high precision, the traditional common linear motor has higher cost, and the market demand of fine processing is more and more difficult to meet.
Disclosure of Invention
The invention solves the technical problems that: aiming at the problem that the existing linear motor is difficult to meet the requirements of modern control systems such as high speed, high precision and the like, the cylindrical permanent magnet linear synchronous motor is provided.
The invention is realized by adopting the following technical scheme:
a cylindrical permanent magnet linear synchronous motor comprises a stator 10, a rotor 20 and a connecting rod 30;
the stator 10 is provided with a cylindrical stator shell, a stator winding 11 comprising a plurality of pairs of poles is arranged in the stator shell in a surrounding manner, a traveling wave magnetic field for driving the rotor is formed around a hollow channel of the stator shell, the rotor 20 is assembled in the hollow channel of the stator shell surrounded by the stator winding 11 in a sliding manner, a plurality of groups of rotor permanent magnets 21 magnetized in the axial direction are packaged in the rotor 20, the connecting rod 30 is connected with the rotor 20 and extends out of the stator 10 from the hollow channel of the stator shell, the traveling wave magnetic field formed by the rotor through the stator winding moves linearly in the axial direction in the hollow channel of the stator shell, and the linear motion is output through the connecting rod.
In the cylindrical permanent magnet linear synchronous motor of the present invention, specifically, the stator winding 11 is a three-phase winding, six coils correspond to a pair of poles, and windings of a plurality of pairs of poles are wound along the axial direction of the stator housing.
In the cylindrical permanent magnet linear synchronous motor of the present invention, specifically, the cylindrical stator housing of the stator 10 includes a stator inner tube 12 and a stator outer tube 13 coaxially disposed, the stator winding 11 is wound in an annular space between the stator inner tube 12 and the stator outer tube 13, an insulating annular spacer 14 is disposed between the windings, an end portion of the annular space is encapsulated by an end cap with a hole, and the stator outer tube 13 is made of ferromagnetic material. The size and the precision of the installation position of the stator winding coil can be ensured through a press mounting mode, the winding coils are separated through an insulation spacer, and the insulation performance and the pressure resistance between each phase of coils are improved.
In the cylindrical permanent magnet linear synchronous motor, further, a Hall probe 18 for detecting the magnetic induction intensity of the rotor permanent magnet is arranged between stator windings in the stator shell, the Hall probe 18 is fixedly arranged in the circular ring of the stator shell through an insulated Hall probe base 17, and the Hall probe detects the magnetic induction intensity value generated by the permanent magnet in the rotor to detect the moving position of the rotor in the stator shell.
In the cylindrical permanent magnet linear synchronous motor, specifically, two groups of the hall probes 18 are arranged on the same hall probe base 17, the axial length of the hall probe base 17 is an integral multiple of the pole pitch of the motor, the axial interval between the two groups of the hall probes 18 is 1/2 of the pole pitch of the motor, and the distances from the two groups of the hall probes 18 to the center of the hall probe base 17 are the same. The Hall probe is far away from the coil, and the influence of a magnetic field generated by the coil on Hall output is small.
In a cylindrical permanent magnet linear synchronous motor of the present invention, further, the hall probe 18 further has a digital filtering module and a temperature compensation module. The digital filtering can filter external interference signals by modifying the cut-off frequency, the temperature compensation can correct and compensate the magnetic field change value of the permanent magnet caused by temperature rise of the motor by modifying the temperature coefficient, and the Hall probe outputs sine waves along with the movement of the rotor permanent magnet, and the signals can be analog signals or digital signals.
In a cylindrical permanent magnet linear synchronous motor according to the present invention, specifically, the stator outer tube 13 is provided with an opening structure extending in the axial direction, and the winding lead 19 of the stator winding 11 and the hall lead 110 of the hall probe 18 are routed along the opening structure and led out of the motor. The opening structure on the stator outer tube eliminates the eddy current generated by the rotor permanent magnet magnetic field in the ferromagnetic outer tube of the stator outer tube along the whole circumferential direction, reduces the running resistance of the rotor and improves the efficiency of the linear motor.
In the cylindrical permanent magnet linear synchronous motor of the invention, specifically, the mover 20 is provided with a mover outer tube 23 with two open ends, a plurality of mover permanent magnets 21 magnetized axially are arranged in the mover outer tube 23 along the axial direction, adjacent mover permanent magnets 21 are separated by a magnet collecting block 22, two permanent magnets 21 and two magnet collecting blocks 22 form a pair of poles, an end magnet collecting block 24 is arranged on the axial outer side of the end mover permanent magnet 21, and the magnet collecting block 22 and the end magnet collecting block 24 are made of ferromagnetic materials.
In the cylindrical permanent magnet linear synchronous motor, specifically, the rotor permanent magnet 21, the magnet collecting block 22 and the end magnet collecting block 24 are tightly packed in the rotor outer tube 23 through supporting seats arranged at two ends of the rotor outer tube 23 in an opening mode, bearings 27 which are slidably assembled with the stator inner tube are arranged on the outer sides of the supporting seats, and the connecting rod 30 is fixedly connected with the supporting seats.
In a cylindrical permanent magnet linear synchronous motor of the present invention, specifically, the connecting rod 30 is provided with a connecting hole for connecting a load, and the connecting hole can be connected with the load by a pin joint manner.
The cylindrical permanent magnet linear motor has the following beneficial effects:
(1) In the linear motor, the motor rotor is arranged in the motor stator, and the rotor is always arranged in the stator in the motion process, so that the structure can effectively utilize the magnetic field of the permanent magnet rotor, reduce the quality of the permanent magnet rotor and improve the mechanical dynamic characteristic of the motor; meanwhile, the permanent magnet is positioned inside the motor stator, and the risk of adsorbing external ferromagnetic substances does not exist.
(2) In the linear motor, the outer tube of the stator is made of ferromagnetic materials, so that the magnetic focusing effect is achieved, the magnetic circuit reluctance of the permanent magnet is reduced, the magnetic field intensity of an air gap in the motor is improved for the interior of the motor, and the thrust of the linear motor is improved. The stator outer tube can effectively shield the influence of the magnetic field of the rotor permanent magnet on the outside of the motor and can shield high-frequency electromagnetic interference generated by the coil winding, so that the linear motor is not limited by the outside ferromagnetic installation environment; the motor has little external electromagnetic radiation. Based on the advantages, in the application and installation of the linear motor, a plurality of linear motors can be closely installed side by side, and the motors are not interfered with each other.
(3) In the linear motor, the stator outer tube is provided with the opening along the axial direction, so that the eddy current generated by the magnetic field of the rotor permanent magnet in the stator ferromagnetic outer tube along the whole circumferential direction can be eliminated, the running resistance is reduced, and the motor efficiency is improved.
(4) In the linear motor, the Hall probe for detecting the rotor can not only output the position signal of the rotor, but also acquire the temperature value of the motor, and is used for real-time monitoring and over-temperature protection of the motor, and the size of the motor can be reduced without installing a temperature probe.
In summary, the cylindrical permanent magnet linear motor provided by the invention has the advantages of compact structure, stable and reliable motor output and high control precision, and is suitable for the fields requiring high-speed, high-efficiency and precise linear driving, such as numerical control machine tools, semiconductor equipment, 3C lithium battery equipment, medical equipment and the like.
The invention is further described below with reference to the drawings and detailed description.
Drawings
Fig. 1 is a schematic diagram of the overall internal structure of a cylindrical permanent magnet linear motor according to an embodiment.
Fig. 2 is a schematic view of a stator structure in an embodiment.
Fig. 3 is a schematic diagram of a stator winding distribution in an embodiment.
Fig. 4 is a schematic diagram of a mover structure in an embodiment.
Fig. 5 is a schematic diagram of mover permanent magnet distribution in the embodiment.
Fig. 6 is a schematic cross-sectional view of a stator and mover in an embodiment.
Reference numerals in the drawings:
10-stator, 11-stator winding, 12-stator inner tube, 13-stator outer tube, 14-spacer, 15-left end cover, 16-right end cover, 17-Hall probe base, 18-Hall probe, 19-winding lead and 110-Hall lead;
20-rotor, 21-rotor permanent magnet, 22-magnetic gathering block, 23-rotor outer tube, 24-end magnetic gathering block, 25-left support seat, 26-right support seat, 27-bearing,
30-connecting rod.
Detailed Description
Examples
Referring to fig. 1, a cylindrical permanent magnet linear synchronous motor is shown as a specific embodiment of the present invention, which comprises three parts, namely a stator 10, a rotor 20 and a connecting rod 30, wherein the stator 10 is fixed relative to the rotor, and provides a passage for the rotor to slide linearly and forms a magnetic field for driving the rotor to slide around the passage, the rotor 20 slides linearly inside the stator by the acting force of the magnetic field, and the linear motion is output to a connected load by the connecting rod 30, which is the driving principle of the linear synchronous motor in this embodiment.
Referring to fig. 2 and 4 in combination, in this embodiment, the main body of the stator 10 is a cylindrical stator housing with an annular cavity, where the cylindrical stator housing includes a circular ring inner cavity and a circular hollow channel, the circular ring inner cavity is a stator inner structure installation space, the circular hollow channel forms a sliding channel of the mover, the circular ring inner cavity of the stator housing is wound with a stator winding 11 including a plurality of pairs of poles, all the stator windings 11 in the stator housing form a travelling wave magnetic field for driving the mover around the circular hollow channel in the stator housing, the mover 20 is slidingly assembled in the stator housing hollow channel surrounded by the stator windings 11, a plurality of groups of axially magnetized mover permanent magnets 21 are axially encapsulated in the mover 20, the mover permanent magnets 21 are driven by the travelling wave magnetic field formed by energizing the stator windings to drive the stator to reciprocate linearly in the stator housing hollow channel in the axial direction, the connecting rod 30 is connected with the mover 20 and extends out of the stator 10 from the hollow channel of the stator housing, and the mover 20 outputs the linear synchronous motor to an external load through the connecting rod 30.
The stator winding 11 in this embodiment specifically adopts a three-phase winding, six coils correspond to a pair of poles, and windings of a plurality of pairs of poles are wound along the axial direction of the stator housing. As shown in fig. 3, the stator winding 11 in this embodiment is composed of A, B, C three-phase windings, in which six coils a+, C-, b+, a-, c+, B-are arranged in the axial direction to form a pair of poles, one pair of poles has a 2-fold pole pitch, i.e., 2τ, and the entire motor stator includes the stator windings of a plurality of pairs of poles.
Referring again to fig. 2, the cylindrical stator housing of the stator 10 in this embodiment includes a stator inner tube 12 and a stator outer tube 13 coaxially disposed, wherein the stator winding 11 is disposed in an annular space between the stator inner tube 12 and the stator outer tube 13, the stator outer tube 13 forms an outer housing of the whole motor, the outer wall of the stator inner tube 12 is used for winding positioning of the stator winding, the inner wall provides a circular hollow passage through which the mover moves linearly in the axial direction, an insulating annular spacer 14 is disposed between the windings, the wound stator winding 11 and the spacer 14 are sleeved on the stator inner tube 12, and both ends are tightly packaged in the annular spaces of the stator inner tube 12 and the stator outer tube 13 through a left end cover 15 and a right end cover 16 with holes.
Specifically, the inner stator tube 12 and the outer stator tube 13 are both cylindrical tubes with openings at two ends, the outer stator tube 12 is made of ferromagnetic materials, the ferromagnetic materials have a magnetism gathering effect, the magnetic circuit magnetic resistance of a permanent magnet is reduced, so that the magnetic field strength of an air gap is improved, the thrust of a motor is improved, two ends of a stator shell are packaged through a left end cover 15 and a right end cover 16, flange steps are arranged on the end covers and used for coaxially positioning the inner stator tube 12 and the outer stator tube 13, the stator 10 compresses and axially positions an inner winding coil of the motor stator through the left end cover 15 and the right end cover 16, and the size and the precision of the installation position of the winding coil of the stator can be ensured in a press-fitting mode. The left end cover 15 and the right end cover 16 can be fixedly connected with the stator outer tube 13 in a bonding or welding mode.
The end caps at the two ends of the stator shell are provided with through holes for the connecting rods to pass through according to the extending direction of the connecting rods 30, the size of the through holes is only used for the connecting rods to pass through, and the rotor cannot extend out of the stator shell through the through holes, so that the movement limit position of the rotor in the stator is limited. For example, in the embodiment, the connecting rod 30 is output by a single-side connecting rod, and extends out of the right end cover 16, and in practical application, the connecting rod may also extend out of the left end cover, or extend out of two end covers of the stator housing of the motor by adopting a double connecting rod. In addition, the holes on the left end cover and the right end cover can also be used for exhausting when the rotor 20 moves linearly in the hollow channel of the stator shell, so that the reduction of the movement control precision caused by air compression in the motor is avoided. The spacers 14 for separating the winding coils are made of insulating materials such as nylon or glass fiber, and the insulating performance and the pressure resistance between each phase of coils are improved.
Further, in this embodiment, a hall probe 18 for detecting the movement of the mover is disposed in the stator housing, and the hall probe 18 is installed in the annular space of the stator housing between the stator windings, and the moving position of the mover is calculated by detecting the magnetic induction intensity of the moving mover. Specifically, the hall probe 18 is fixedly installed between the stator windings through an insulated hall probe base 17, the hall probe base 17 is made of non-magnetic insulation material, and the hall probe base 17 is fixedly sleeved on the stator inner tube 12 by adopting an annular structure in combination with a stator winding installation space enclosed between the stator inner tube 12 and the stator outer tube 13 in the embodiment.
In this embodiment, two groups of spaced hall probes 18 are adopted, the two groups of hall probes 18 are mounted on the same hall probe base 17, the axial length of the hall probe base 17 is an integer multiple of the pole pitch of the stator winding, the axial spacing between the two groups of hall probes 18 is 1/2 of the pole pitch of the motor, and the distances from the two groups of hall probes 18 to the center of the hall probe base 17 are the same. In this embodiment, the axial length of the hall probe base 17 is 1τ, that is, equal to the pole pitch of the motor, and the two groups of hall probes 18 are symmetrically distributed on the hall probe base 17 with the axial center line of the hall probe base 17 as a symmetry center, and the distance between the hall probes 18 is τ/2. In this embodiment, two hall probes 18 with an axial interval τ/2 are selected, two paths of sine signals with phase angles different by 90 ° are output, and the position and the moving direction of the motor rotor 20 can be calculated through the two paths of signals. Two hall probes 18 are installed on hall installation base 17, and the center of two hall probes distance coincides with the center of hall installation base, and the coil is kept away from to the hall probe, and the coil produces the magnetic field and influences less to hall output.
In practical applications, the hall probe 18 may also be a product with a digital filter module and a temperature compensation module, such as the intel TLE4997. The Hall probe of the model integrates the functions of signal amplification, digital filtering, temperature detection, temperature compensation and the like, the digital filtering function can filter external interference signals by modifying the cutoff frequency, the temperature compensation function can correct and compensate the magnetic field change value of the permanent magnet caused by the temperature rise of the motor by modifying the temperature coefficient, and the Hall probe outputs a sine wave along with the movement of the rotor permanent magnet, and the signal can be an analog signal or a digital signal. The temperature signal output by the Hall probe can be used for motor temperature real-time monitoring and over-temperature protection. In addition, the Hall probe 18 integrating the temperature acquisition function is adopted, so that not only can the position signal be output, but also the motor temperature value can be acquired, the motor temperature real-time monitoring and over-temperature protection are realized, the temperature probe is not required to be installed, and the motor size can be reduced.
Referring to fig. 4 and 5 in combination, the mover 20 in this embodiment has a mover outer tube 23 with two open ends, a plurality of mover permanent magnets 21 magnetized axially are arranged in the mover outer tube 23 along the axial direction, adjacent mover permanent magnets 21 are separated by a magnet collecting block 22, two permanent magnets 21 and two magnet collecting blocks 22 are adopted to form a pair of poles, the pole distance is twice the pole distance of the stator winding, and an end magnet collecting block 24 is further arranged on the axial outer side of the end mover permanent magnet 21. The rotor permanent magnet 21, the magnet collecting block 22 and the end magnet collecting block 24 are tightly packed in the rotor outer tube 23 through supporting seats arranged at two ends of the rotor outer tube 23 in an opening mode, bearings 27 which are slidably assembled with the stator inner tube are arranged on the outer sides of the supporting seats, and the connecting rod 30 is fixedly connected with the supporting seats.
Specifically, the outer rotor tube 23 is a circular tube, gaps are reserved between the outer diameter and the inner stator tube 12, the outer diameters of the rotor permanent magnets 21, the magnet collecting blocks 22 and the magnet collecting blocks 24 are consistent with the inner diameter of the outer rotor tube 23, the outer sides of the magnet collecting blocks 24 are provided with left supporting seats 25 and right supporting seats 26 to seal the end openings of the outer rotor tube 23, and the rotor permanent magnets 21 and the magnet collecting blocks are packaged inside the rotor permanent magnets. The mover permanent magnet 21 in this embodiment may be made of magnetic materials such as neodymium-iron-boron, ferrite, and samarium-cobalt, and a high-grade neodymium-iron-boron magnet is preferably selected, so that the motor performance can be improved. The magnetic focusing blocks 22 and the end magnetic focusing blocks 24 are made of ferromagnetic materials, and preferably are made of electrician pure iron. The mover outer tube 23 is used for packaging the mover permanent magnet 21, and is made of non-magnetic conductive materials, preferably SUS304 stainless steel. The left support seat 25 and the right support seat 26 which are arranged at the two ends of the rotor outer tube 23 and are opened are used for packaging the rotor permanent magnet 21 and the mounting bearing 27, and the materials of the left support seat 25 and the right support seat 26 are required to be non-magnetic, and SUS304 stainless steel is preferably selected. The bearings 27 at the left and right ends of the mover may be slide bearings or rolling bearings.
The connecting rod 30 in this embodiment is used for connecting the motor rotor with the load, outputting linear motion to drive the load, and the connecting rod 30 in this embodiment is a hollow thin round tube, which can effectively reduce weight and increase mechanical strength, and the connecting rod front end is provided with a connecting hole, which can be connected with the load by pin joint.
As shown in fig. 6, the stator outer tube 13 of the present embodiment is provided with an opening structure extending in the axial direction, along which the winding leads 19 of the stator winding 11 and the hall leads 110 of the hall probe 18 are routed and led out of the motor. The opening structure on the stator outer tube 13 can eliminate the eddy current generated by the rotor permanent magnet magnetic field in the ferromagnetic outer tube of the stator outer tube along the whole circumferential direction, reduce the running resistance of the rotor and improve the efficiency of the linear motor. Meanwhile, the epoxy resin is used for leading out and wiring the winding coil lead and the Hall lead, and the epoxy resin is encapsulated in the opening structure after the motor is installed, so that the heat conducting performance, the waterproof grade, the pressure-resistant grade, the structural strength of the motor and the like of the motor shell are improved.
In this document, the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "vertical", "horizontal", etc. refer to the directions or positional relationships based on those shown in the drawings, and are merely for clarity and convenience of description of the expression technical solution, and thus should not be construed as limiting the present invention.
In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements is included, and may include other elements not expressly listed.
The foregoing is merely illustrative embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think about variations or substitutions within the technical scope of the present invention, and the invention should be covered. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (10)
1. A cylindrical permanent magnet linear synchronous motor is characterized in that: comprises a stator (10), a rotor (20) and a connecting rod (30);
the stator (10) is provided with a cylindrical stator shell, a stator winding (11) comprising a plurality of pairs of poles is arranged in the stator shell in a surrounding mode, the rotor (20) is assembled in a hollow channel of the stator shell surrounded by the stator winding (11) in a sliding mode, a plurality of groups of rotor permanent magnets (21) magnetized in the axial direction are packaged in the rotor (20), and the connecting rod (30) is connected with the rotor (20) and extends out of the stator (10) from the hollow channel of the stator shell.
2. A cylindrical permanent magnet linear synchronous motor according to claim 1, wherein the stator winding (11) is a three-phase winding, six coils correspond to one pair of poles, and the windings of a plurality of pairs of poles are wound along the axial direction of the stator housing.
3. The cylindrical permanent magnet linear synchronous motor according to claim 2, wherein the cylindrical stator housing of the stator (10) comprises a stator inner tube (12) and a stator outer tube (13) which are coaxially arranged, the stator winding (11) is wound in an annular space between the stator inner tube (12) and the stator outer tube (13), an insulating annular spacer (14) is arranged between the windings, the end part of the annular space is encapsulated by an end cover with holes, and the stator outer tube (13) is made of ferromagnetic material.
4. The cylindrical permanent magnet linear synchronous motor according to claim 1, wherein a Hall probe (18) for detecting the magnetic induction intensity of the rotor permanent magnet is arranged between stator windings in the stator housing, and the Hall probe (18) is fixedly arranged inside a circular ring of the stator housing through an insulating Hall probe base (17).
5. The cylindrical permanent magnet linear synchronous motor according to claim 4, wherein the two groups of the hall probes (18) are arranged on the same hall probe base (17), the axial length of the hall probe base (17) is an integral multiple of the pole pitch of the motor, the axial interval between the two groups of the hall probes (18) is 1/2 of the pole pitch of the motor, and the distances from the two groups of the hall probes (18) to the center of the hall probe base (17) are the same.
6. A cylindrical permanent magnet linear synchronous motor according to claim 5, the hall probe (18) further having a digital filtering module and a temperature compensation module.
7. A cylindrical permanent magnet linear synchronous motor according to claim 4, wherein the stator outer tube (13) is provided with an axially extending opening structure, and the winding leads (19) of the stator winding (11) and the hall leads (110) of the hall probe (18) are routed along the opening structure and led out of the motor.
8. The cylindrical permanent magnet linear synchronous motor according to claim 1, wherein the mover (20) is provided with a mover outer tube (23) with two open ends, a plurality of mover permanent magnets (21) magnetized axially are arranged in the mover outer tube (23), adjacent mover permanent magnets (21) are separated by magnet collecting blocks (22), two permanent magnets (21) and two magnet collecting blocks (22) form a pair of poles, end magnet collecting blocks (24) are further arranged on the outer side of the end mover permanent magnets (21) in the axial direction, and the magnet collecting blocks (22) and the end magnet collecting blocks (24) are made of ferromagnetic materials.
9. The cylindrical permanent magnet linear synchronous motor according to claim 8, wherein the rotor permanent magnet 21, the magnet collecting block 22 and the magnet collecting block 24 are tightly packed in the rotor outer tube (23) through supporting seats arranged at two ends of the rotor outer tube (23), bearings (27) which are slidably assembled with the stator inner tube are arranged at the outer sides of the supporting seats, and the connecting rod (30) is fixedly connected with the supporting seats.
10. A cylindrical permanent magnet linear synchronous motor according to claim 1, wherein the connecting rod (30) is provided with a connecting hole for connecting a load.
Priority Applications (1)
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| CN202310623247.8A CN116545210A (en) | 2023-05-30 | 2023-05-30 | Cylindrical permanent magnet linear synchronous motor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117040205A (en) * | 2023-08-28 | 2023-11-10 | 佛山市增广智能科技有限公司 | Device and method for six-degree-of-freedom position sensing of planar motor |
| CN117477891A (en) * | 2023-12-28 | 2024-01-30 | 燕山大学 | Rotor housing with slotting structure and magnetic shaft type linear motor |
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2023
- 2023-05-30 CN CN202310623247.8A patent/CN116545210A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117040205A (en) * | 2023-08-28 | 2023-11-10 | 佛山市增广智能科技有限公司 | Device and method for six-degree-of-freedom position sensing of planar motor |
| CN117040205B (en) * | 2023-08-28 | 2024-04-26 | 佛山市增广智能科技有限公司 | Device and method for six-degree-of-freedom position sensing of planar motor |
| CN117477891A (en) * | 2023-12-28 | 2024-01-30 | 燕山大学 | Rotor housing with slotting structure and magnetic shaft type linear motor |
| CN117477891B (en) * | 2023-12-28 | 2024-03-05 | 燕山大学 | Rotor housing with slotting structure and magnetic shaft type linear motor |
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