High-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor

Abstract

An outer stator structure comprises three stators, a first outer stator assembled by a pure iron core is located in the middle, second outer stators with embedded permanent magnets are symmetrically distributed at the left end and the right end, and every two adjacent outer stators are spaced through an outer stator fixing ring. The rotor main body structure comprises a rotor non-magnetic support iron core, a first permanent magnet and a rotor magnetic core, and outer air gaps are uniformly formed between the first permanent magnet and the outer stator and between the rotor magnetic core and the outer stator; and mover supporting accessories are symmetrically arranged at the two ends of the mover main body structure. The motor rotor adopts a mixed assembly structure of the permanent magnet and the magnetic-conductive iron cores, and the magnetic-conductive iron cores are located at symmetrical positions at two ends of the permanent magnet, so that the effects of providing a magnetic circuit and reducing magnetic resistance are achieved. And meanwhile, the outer stator also adopts a multi-stator structure, two annularly distributed stator structures are placed at two ends of the traditional single-phase stator, and the thrust density is improved by utilizing the spare space of the motor.

Description

Technical Field

[0001] The present invention relates to the technical field of linear oscillating motors, and particularly to a high-power multi-stator single-phase cylindrical permanent magnet linear oscillating motor. Background Art

[0002] A linear motor can directly achieve the linear motion of a load, eliminating transmission structures such as crankshafts in the control system, and having advantages such as a simple structure, high transmission efficiency, and fast operating frequency, thus receiving increasing attention in the field of linear motion. Compared with traditional flat linear motors, cylindrical linear motors improve the single-phase magnetic pull force between the mover and the stator, increase the utilization rate of permanent magnets and windings, and achieve an increase in the thrust density of the motor.

[0003] In the field of reciprocating linear oscillating motion, traditional multi-pole multi-slot linear oscillating motors often have a low operating frequency due to the large mass of the mover. At the same time, due to the unbalanced distribution of the three-phase windings, the motor control system is relatively complex, increasing the difficulty of the motor control system. Single-phase linear oscillating motors are currently the focus of research in high-frequency linear oscillating motion because of their simple structure and the ability to achieve linear reciprocating motion of the mover by applying single-phase alternating current to the armature winding. In existing single-phase multi-pole linear oscillating motors, the length of the mover is greater than the axial length of the stator, resulting in a low utilization rate of the end permanent magnets during the operation of the motor. At the same time, during the assembly process, there are large gaps at the ends of the outer stator that are not utilized. Summary of the Invention

[0004] 1. Technical problems to be solved: How to improve the utilization rate of permanent magnets in a single-phase multi-pole permanent magnet linear oscillating motor, make full use of the internal space of the motor, and reduce the cost of the motor.

[0005] 2. Technical solutions: To solve the above problems, the present invention provides a high-power multi-stator single-phase cylindrical permanent magnet linear oscillating motor, including a machine shell, an annular outer stator structure, a mover main body structure, and an inner stator structure. The mover main body structure is located in the inner cavity of the outer stator, and the mover main body structure is nested outside the inner stator structure, forming an inner air gap therebetween. Both ends of the machine shell are covered and connected with end covers; positioning teeth are provided on the inner wall of the machine shell to fix the position of the outer stator structure. The outer stator structure includes three stators. The first outer stator assembled with a pure iron core is located in the middle, and the second outer stators with embedded permanent magnets are symmetrically distributed at both left and right ends. Adjacent two outer stators are spaced by an outer stator fixing ring. The mover main body structure includes a mover non-magnetic support iron core, a first permanent magnet, and a mover magnetic conducting iron core. The first permanent magnet and the mover magnetic conducting iron core uniformly form an outer air gap with the outer stator; mover support fittings are symmetrically placed at both ends of the mover main body structure.

[0006] The first outer stator includes a first outer stator body. The first outer stator body includes a C-shaped first outer stator core, first outer stator tooth part antennae, and a first outer stator slot. The first outer stator core is of an annular structure. The first outer stator tooth part antennae are of a right trapezoidal structure on the inner side of the tooth part, and there is an annular air gap between the first outer stator tooth part antennae at the left and right ends. The annular gap formed by the C-shaped first outer stator core and the first outer stator tooth part antennae is the first outer stator slot, and the first outer stator winding coil is placed in the first outer stator slot and fixed by a first outer stator positioning ring.

[0007] The first outer stator positioning ring is provided with a first outer stator positioning ring protrusion in a fan-shaped structure, which plays a fastening role on the stator block of the first outer stator core.

[0008] The second outer stator includes a second outer stator core. The second outer stator core is of a T-shaped structure and includes a second outer stator core yoke, second outer stator core tooth parts, and second outer stator core tooth part antennae. The second outer stator core tooth part antennae are located at both ends of the second outer stator core tooth part close to the inner circle. Second permanent magnets with opposite magnetization directions are distributed at both ends of the second outer stator core yoke, and the second outer stator winding is wound around the second outer stator core tooth parts. The second stator cores and the second permanent magnets, both with a quantity of 2N, are spliced into an annular second outer stator along the circumferential direction. The quantity of the second outer stator cores is the same as that of the stator blocks of the first outer stator core, and the two are aligned along the central position, where N is a positive integer.

[0009] The inner diameter of the first outer stator positioning ring is greater than the inner diameter of the second outer stator core yoke. The inner diameter of the ring formed by splicing the first outer stator body should be equal to the inner diameter of the second outer stator core.

[0010] The rotor main body structure includes a first permanent magnet, a rotor magnetic conducting core, and a rotor non-magnetic support. The first permanent magnet is of a tile-shaped structure, and 2N tile-shaped first permanent magnets are spliced into a magnetic ring. The rotor magnetic conducting core is of an annular structure and is symmetrically distributed at both ends of the first permanent magnet. 2N rotor magnetic conducting core inclined slots are formed on the outer surface of the rotor magnetic conducting core, and a rotor magnetic conducting core parallel tooth is formed between two adjacent rotor magnetic conducting core inclined slots. The width of the rotor magnetic conducting parallel tooth is equal to the width of the end parts of the two second outer stator core antennae located on the same tooth. A rotor magnetic conducting core positioning slot is formed on the inner wall of the rotor magnetic conducting core at the alignment center of the rotor magnetic conducting core parallel teeth, where N is a positive integer.

[0011] Axial spaced teeth, first permanent magnet positioning teeth, and mover iron core positioning teeth are provided on the outer surface of the non-magnetic support of the mover; a rectangular through-hole with an area smaller than the area of the slot is provided in the slot formed by each mover iron core positioning tooth; the mover iron core positioning teeth are symmetrically distributed at both ends of the first permanent magnet positioning teeth and are separated by axial spaced teeth in the middle; the mover iron core positioning teeth and the first permanent magnet positioning teeth are evenly distributed in the circumferential direction on the surface of the non-magnetic support of the mover, and the number of both is 2N, where N is a positive integer, and the included angle between the mover iron core positioning teeth and the first permanent magnet positioning teeth is 90 / N degrees, where N is a positive integer; the non-magnetic support connection columns of the mover are symmetrically distributed at both ends of the non-magnetic support of the mover, the centers of the non-magnetic support connection columns of the mover are aligned with the mover iron core positioning teeth, and threaded holes are machined at the center positions of their end faces.

[0012] Mover support fittings are symmetrically distributed at both ends of the mover main body structure, and the mover support fittings include mover claw-shaped support disks and spring assemblies; even-numbered sector through-holes are evenly provided along the circumferential direction at the ends of the mover claw-shaped support disks, and mover claw-shaped support teeth are formed between two adjacent sector through-holes, and circular through-holes aligned with the threaded hole positions of the non-magnetic support connection columns of the mover are provided on the outer sides of the mover claw-shaped support teeth; an installation through-hole is provided at the center of the mover claw-shaped support disk for firmly installing an output shaft; the spring assembly includes a spring and a spring support disk, the spring support disk is a cylindrical structure with one end open, and a through-hole is provided at the center of the bottom, and the spring support disk, the mover claw-shaped support disk, and the non-magnetic support of the mover are firmly connected by screws; one end of the spring is placed in the spring support disk, and the other end is firmly connected to the end cover.

[0013] The inner stator structure includes an inner stator core body for providing the main magnetic circuit, a fastening support disk for fixing the inner stator core in a circular shape, and a fixed support column for fixing the position of the inner stator. The inner stator core body is a ring structure, and its two end faces are provided with inner stator positioning grooves for positioning and assembly. The inner stator positioning grooves cooperate with the positioning teeth on the end face of the fastening support disk, and the fastening support disks are symmetrically distributed on both sides of the inner stator core body. The other end face is provided with support column threaded holes for installing and fixing the support columns. The number of the support column threaded holes is the same as the number of the rotor claw-shaped support teeth. The support column threaded holes are evenly distributed along the circumferential direction on the end face of the fastening support disk, and the radius of the circle where their centers are located is smaller than the outer diameter of the fastening support disk. Inside the circle smaller than the distribution circle of the support column threaded holes, fastening circular through holes are distributed. The left and right fastening support disks are fastened by steel bars passing through the fastening circular through holes. Sector-shaped through holes are evenly opened along the circumferential direction on the end face of the fastening support disk. A bearing installation hole is provided in the center of the fastening support disk for firmly installing a linear bearing. The fixed support columns are symmetrically distributed on both sides of the inner stator fastening support disk. One end of each fixed support column is firmly connected to the fastening support disk, and the other end is firmly connected to the end cover. The fixed support columns are located at the center positions of the sector-shaped through holes on the rotor claw-shaped support.

[0014] The output shaft of the motor includes an output shaft sliding rod, fastening fittings, and an output end of the output shaft. The output shaft sliding rod is slidably connected to the linear bearing. The fastening fittings are located at both ends of the output shaft sliding rod and are fixed in the installation through holes of the rotor support disk, so that the output shaft sliding rod is firmly connected to the rotor claw-shaped support disk. The output end of the output shaft is firmly installed at the end of the fastening fittings, so as to be connected to an external load.

[0015] 3. Beneficial effects: The present invention provides a high-power multi-stator single-phase cylindrical permanent magnet linear oscillating motor. The rotor of the motor adopts a hybrid assembly structure of permanent magnets and ferromagnetic cores. The ferromagnetic cores are located at symmetrical positions at both ends of the permanent magnets, playing a role in providing a magnetic circuit and reducing magnetic resistance. At the same time, the outer stator also adopts a multi-stator structure. Two annularly distributed stator structures are placed at both ends of the traditional single-phase stator, making use of the vacant space in the motor to improve the thrust density. Description of the drawings

[0016] Figure 1 is a schematic structural diagram of a high-power multi-stator single-phase cylindrical permanent magnet linear oscillating motor.

[0017] Figure 2 is an exploded schematic diagram of the outer stator structure.

[0018] Figure 3 is a schematic structural diagram of the rotor main body.

[0019] Figure 4 is a schematic diagram of the rotor ferromagnetic core.

[0020] Figure 5 It is a schematic diagram of the mover structure.

[0021] Figure 6 It is a schematic diagram of the output shaft structure.

[0022] Figure 7 It is an exploded schematic diagram of the inner stator structure.

[0023] Figure 8 It is a schematic diagram of the magnetic circuit of the second outer stator of a high-power multi-stator single-phase cylindrical permanent magnet linear oscillating motor.

[0024] Figure 9 It is a schematic diagram of the complete main magnetic circuit inside the linear oscillating motor.

[0025] Explanation of the reference numerals in the attached drawings: 1. The first outer stator; 11. The main body of the first outer stator; 111. The iron core of the first outer stator; 112. The tooth part antenna of the first outer stator; 113. The slot of the first outer stator; 12. The positioning ring of the first outer stator; 121. The main body of the positioning ring of the first outer stator; 122. The protrusion of the positioning ring of the first outer stator; 13. The winding coil of the first outer stator; 2. The second outer stator; 21. The iron core of the second outer stator; 211. The yoke part of the iron core of the second outer stator; 212. The tooth part of the iron core of the second outer stator; 213. The tooth part antenna of the iron core of the second outer stator; 22. The winding coil of the second outer stator; 23. The second permanent magnet; 3. The main structure of the mover; 31. The first permanent magnet; 32. The mover's magnet conducting iron core; 321. The parallel teeth of the mover's magnet conducting iron core; 322. The inclined slot of the mover's magnet conducting iron core; 323. The positioning slot of the mover's magnet conducting iron core; 33. The non-magnetic conducting support of the mover; 331. The iron core of the non-magnetic conducting support of the mover; 332. The positioning teeth of the first permanent magnet; 333. The positioning teeth of the mover's magnet conducting iron core; 334. The rectangular through hole; 335. The connecting column of the non-magnetic conducting support of the mover; 4. The mover support fitting; 41. The mover claw-shaped support disk; 411. The claw-shaped support teeth of the mover; 412. The fan-shaped through hole; 413. The installation through hole; 42. The spring assembly; 421. The spring; 422. The spring support disk; 5. The output shaft; 51. The sliding rod of the output shaft; 52. The fastening fitting; 53. The output end of the output shaft; 6. The inner stator structure; 61. The main body of the inner stator iron core; 611. The positioning slot of the inner stator; 62. The fastening support disk; 621. The outer stator positioning teeth; 622. The threaded hole of the support column; 623. The fastening circular through hole; 624. The fan-shaped through hole; 625. The bearing installation hole; 63. The fixed support column; 7. The machine shell; 8. The end cover; 9. The linear bearing. Specific embodiments

[0026] The present invention will be described in detail below with reference to the accompanying drawings and embodiments. In this article, N is an integer.

[0027] As Figure 1As shown in the figure, a high-power multi-stator single-phase cylindrical permanent magnet linear oscillating motor includes a machine housing 7, an annular outer stator structure, a mover main body structure 3, and an inner stator structure 6. The mover main body structure 3 is located in the inner cavity of the outer stator. The mover main body structure 3 is nested outside the inner stator structure 6, and an inner air gap is formed between the two. Both ends of the machine housing 7 are covered and connected with end covers 8. The inner wall of the machine housing 7 is provided with positioning teeth 621 for fixing the position of the outer stator structure. The outer stator structure includes three stators. Among them, the first outer stator 1 assembled with a pure iron core is located in the middle, and the second outer stators 2 embedded with permanent magnets are symmetrically distributed at both left and right ends. Adjacent outer stators are separated by an outer stator fixing ring. The mover main body structure 3 includes a mover non-magnetic support iron core 331, a first permanent magnet 31, and a mover magnetic conduction iron core 32. The first permanent magnet 31 and the mover magnetic conduction iron core 32 uniformly form an outer air gap with the outer stator. Mover support fittings 4 are symmetrically placed at both ends of the mover main body structure 6.

[0028] In one embodiment, as Figure 2 shown, the first outer stator 1 is composed of a first outer stator main body 11, first outer stator positioning rings 12 located at both ends of the first outer stator main body 11, and a first outer stator winding coil 13. The first outer stator main body 11 includes a C-shaped first outer stator iron core 111, first outer stator tooth part antennae 112, and a first outer stator slot 113.

[0029] In one embodiment, the first outer stator iron core 111 is of a circular ring structure and is formed by splicing stator blocks laminated with silicon steel sheets along the circumferential direction.

[0030] The first outer stator tooth part antennae 112 are in a right trapezoidal structure on the inner side of the tooth part, and an annular air gap is left between the first outer stator tooth part antennae 112 at both left and right ends. The annular gap formed by the C-shaped first outer stator iron core 111 and the first outer stator tooth part antennae 112 is the first outer stator slot 113, and the first outer stator winding coil 13 is placed in the first outer stator slot 113.

[0031] In one embodiment, in order to make the spliced circular ring of the first outer stator main body 11 more regular, it can be fixed by the first outer stator positioning ring 12. The first outer stator positioning ring 12 is provided with a first outer stator positioning ring protrusion 122 in a fan-shaped structure, which plays a fastening role on the stator blocks of the first outer stator iron core 111. The first outer stator positioning ring 12 not only plays a role in fixing the first outer stator main body 11, but also separates the first outer stator main body 11 and the second outer stator 2.

[0032] In one embodiment, the second outer stator 2 is distributed at both ends of the first outer stator 1 and includes a second outer stator core 21, a second outer stator winding coil 22, and a second permanent magnet 23. The second outer stator core 21 has a T-shaped structure and includes three parts: a second outer stator core yoke 211, a second outer stator core tooth 212, and a second outer stator core tooth antenna 213. The second outer stator core tooth antenna 213 is located at both ends of the second outer stator core tooth 212 close to the inner circle; second permanent magnets 23 with opposite magnetization directions are distributed at both ends of the second outer stator core yoke 211, and the second outer stator winding 22 is wound around the second outer stator core tooth 212; the second stator cores 21 and the second permanent magnets 23, both with a quantity of 2N, are spliced into a circular ring-shaped second outer stator 2 along the circumferential direction.

[0033] In one embodiment, the quantity of the second outer stator cores 21 is the same as the quantity of the stator blocks of the first outer stator core 111, and the two are aligned along the central position. To prevent squeezing the second stator winding coil 22 during the assembly process, the inner diameter of the first outer stator positioning ring 12 should be greater than the inner diameter of the second outer stator core yoke; the inner diameter of the circular ring formed by splicing the first outer stator main body 11 should be equal to the inner diameter of the second outer stator core.

[0034] Compared with the traditional single outer stator permanent magnet linear oscillating motor, the cylindrical permanent magnet linear oscillating motor of the present invention makes full use of the axial free space of the outer stator. The newly added second stator will not increase the axial length of the linear oscillating motor, and increases the utilization rate of the internal space of the motor.

[0035] In one embodiment, as Figure 3 shown, the mover main body structure 3 is circular ring-shaped and includes a first permanent magnet 31, a mover magnetic conductive core 32, and a mover non-magnetic conductive support 33; the first permanent magnet 31 has a tile-shaped structure, and 2N tile-shaped first permanent magnets 31 are spliced into a magnetic ring; the mover magnetic conductive core 32 has an annular structure and is symmetrically distributed at both ends of the first permanent magnet 31. 2N mover magnetic conductive core inclined slots 322 are formed on the outer surface of the mover magnetic conductive core 32, and a mover magnetic conductive core parallel tooth 321 is formed between two adjacent mover magnetic conductive core inclined slots 322.

[0036] In one embodiment, as Figure 4 shown, the width of the mover magnetic conductive parallel tooth 321 is equal to the width of the ends of the two second outer stator core antennas 213 located on the same tooth; a mover magnetic conductive core positioning slot 323 is formed on the inner wall of the mover magnetic conductive core 32 at the alignment center of the mover magnetic conductive core parallel tooth.

[0037] In one embodiment, to facilitate the positioning and installation of the first permanent magnet 31 and the mover iron core 32, axial spaced teeth 331, first permanent magnet positioning teeth 332, and mover iron core positioning teeth 333 are provided on the outer surface of the mover non-magnetic support 33. At the same time, to reduce the mass and eddy current loss of the mover non-magnetic support, rectangular through holes 334 with an area smaller than the area of the slot are opened in the slots formed by each positioning tooth. The mover iron core positioning teeth 333 are symmetrically distributed at both ends of the first permanent magnet positioning teeth 332, and are separated by the axial spaced teeth 331 in the middle.

[0038] In one embodiment, the mover iron core positioning teeth 333 and the first permanent magnet positioning teeth 332 are evenly distributed in the circumferential direction on the surface of the mover non-magnetic support 33, and the number of both is 2N. The included angle between the mover iron core positioning teeth 333 and the first permanent magnet positioning teeth 332 is 90 / N degrees. The mover non-magnetic support connection columns 335 are symmetrically distributed at both ends of the mover non-magnetic support 33. The center of the mover non-magnetic support connection column 335 is aligned with the mover iron core positioning teeth 333, and a threaded hole is machined at the center position of its end face.

[0039] In one embodiment, as Figure 5 shown, mover support fittings 4 are symmetrically distributed at both ends of the mover main structure 3. The mover support fittings include a mover claw-shaped support disk 41 and a spring assembly 42. Even-numbered sector through holes 412 are evenly opened along the circumferential direction at the end of the mover claw-shaped support disk 41. Mover claw-shaped support teeth 411 are formed between two sector through holes. Circular through holes aligned with the threaded hole positions of the mover non-magnetic support connection columns 335 are opened on the outer side of the mover claw-shaped support teeth 411. An installation through hole 413 is opened at the center of the mover claw-shaped support disk 41 for fastening and installing the output shaft 5. The spring assembly 42 includes a spring 421 and a spring support disk 422. The spring support disk 422 is a cylindrical structure with one end open, and a through hole is opened at the center position of the bottom. The spring support disk 422, the mover claw-shaped support disk 41, and the mover non-magnetic support 33 can be firmly connected by screws. One end of the spring 421 is placed in the spring support disk 422, and the other end is firmly connected to the end cover 8.

[0040] The mover of the motor of the present invention adopts a mixed assembly method of permanent magnets and iron cores. The permanent magnets used in the second stator core are low-cost ferrite, which reduces the material cost compared with traditional multi-pole permanent magnet linear oscillating motors. At the same time, through the electromagnetic effects at both ends of the stator, the force density of the entire motor is improved.

[0041] In one embodiment, as Figure 6As shown in the figure, the output shaft 5 of the motor includes an output shaft sliding rod 51, a fastening fitting 52, and an output shaft output end 53. The output shaft sliding rod 51 is mainly slidably connected to a linear bearing. The fastening fittings 52 are located at both ends of the output shaft sliding rod 51 and are fixed in the mounting through holes of the mover support disk 41, so that the output shaft sliding rod 51 is firmly connected to the mover claw-shaped support disk 41; the output shaft output end 53 is firmly installed at the end of the fastening fitting, so as to be connected to an external load.

[0042] In one embodiment, the inner stator structure 6 includes an inner stator core body 61 for providing a main magnetic path, a fastening support disk 62 for fixing the inner stator core in a circular shape, and a fixed support column 63 for fixing the position of the inner stator.

[0043] As Figure 7 shown; the inner stator core body 61 is of a circular ring structure, and inner stator positioning grooves 611 for positioning and assembly are provided on both end faces thereof. The inner stator positioning grooves 611 cooperate with the outer stator positioning teeth 621 on the end face of the fastening support disk 62, so as to realize more convenient installation of the inner stator core body 61; the fastening support disks 62 are symmetrically distributed on both sides of the inner stator core body 61. Support column threaded holes 622 for installing and fixing the support columns 63 are provided on the other end face thereof. The number of the support column threaded holes 622 is the same as the number of the mover claw-shaped support teeth 411; the support column threaded holes 622 are evenly distributed along the circumferential direction on the end face of the fastening support disk 62, and the radius of the circle where the centers of the support column threaded holes 622 are located is smaller than the outer diameter of the fastening support disk 62. Inside the circle smaller than the distribution circle of the support column threaded holes 622, fastening circular through holes 623 are distributed. The left and right fastening support disks can be fastened by passing a steel bar through the fastening circular through holes 623; in order to reduce the mass of the fastening support disk 62, sector-shaped through holes 624 are evenly opened along the circumferential direction on the end face of the fastening support disk 62; a bearing mounting hole 625 is provided at the center of the fastening support disk 62 for firmly installing a linear bearing 9; the fixed support columns 63 are symmetrically distributed on both sides of the inner stator fastening support disk 62. One end of the fixed support column 63 is firmly connected to the fastening support disk 62 by a thread, and the other end is firmly connected to the end cover 8, so as to realize the fixation of the inner stator position; the fixed support column 63 should be located at the center position of the sector-shaped through holes 412 on the mover claw-shaped support 41.

[0044] In one embodiment, the assembled first outer stator 1 and second outer stator 2 are placed on the inner wall of the machine housing 7. For the convenience of positioning, outer stator positioning teeth 621 are provided inside the machine housing; both ends of the machine housing 7 and the end cover 8 are firmly installed by screws.

[0045] As Figure 8As shown in the figure, it is a schematic diagram of the magnetic circuit of the second outer stator 2 of a high-power multi-stator single-phase cylindrical permanent magnet linear oscillating motor. The dotted line indicates the direction of magnetic flux. Since the magnetization directions of two adjacent second permanent magnets 23 are different, the magnetic flux is emitted from the second permanent magnet 23, passes through the yoke part 211 of the second outer stator core, the tooth part 212 of the second outer stator, the outer air gap, the parallel teeth 321 of the mover guide magnet core, and then enters the two adjacent parallel teeth 321 of the mover guide magnet core. Finally, it passes through the outer air gap again, passes through the adjacent second outer stator tooth part 212 and the second outer stator core yoke part 211, and returns to the second permanent magnet 23. This process forms a complete magnetic circuit on the second outer stator 2. The plane where this magnetic circuit is located is perpendicular to the direction of mover movement and is also called the transverse magnetic circuit. The current directions of the adjacent second outer stator winding coils 22 are opposite. By adjusting the magnitude and direction of the current, the magnitude of the magnetic flux in the magnetic circuit can be increased or decreased.

[0046] As Figure 9 shown, in the complete main magnetic circuit inside the linear oscillating motor of the present invention, the dotted line indicates the direction of magnetic flux. The magnetic flux generated by the first permanent magnet 31 passes through the outer air gap and enters the tooth part antenna 112 of the first outer stator core. From this, a part of the magnetic flux passes through the C-shaped first outer stator core 111, the right outer air gap, the right mover guide magnet core 32, the inner air gap, the inner stator core body 61, and finally returns to the first permanent magnet 31. Another part of the magnetic flux passes through the outer air gap again, enters the left mover guide magnet core 32, the inner air gap, and the inner stator core body 61, and returns to the first permanent magnet 31. At the same time, a part of the magnetic flux passes through the mover guide magnet core 32 and enters the second outer stator core 21, and finally enters the second permanent magnet 23 to complete the entire magnetic circuit closed-loop. After the first outer stator winding coil 13 is energized, according to the right-hand screw theorem, a horizontal magnetic field is generated, thereby realizing the horizontal movement of the mover.

[0047] The operating principle of the high-power multi-stator single-phase cylindrical permanent magnet linear oscillating motor of the present invention: As Figure 9As shown, when a current in the downward-inward direction is passed through the first outer stator winding coil 13, a magnetic field in the leftward direction is generated inside the toroidal coil. The electromagnetic magnetic field interacts with the permanent magnetic field, thereby generating an electromagnetic force in the leftward direction. At the same time, a current that enhances the magnetic field inside it is applied to the second outer stator winding coil 22 on the left side. The magnetic field will cause the mover guide magnet core to move to the left according to the principle of minimum magnetic resistance, thereby generating a magnetic pulling force in the leftward direction on the mover. For the second outer stator winding coil 22 on the right side, a current that reduces the magnetic field inside it is applied, thereby reducing the magnetic pulling force on the mover guide magnet core in the rightward direction. At this time, the electromagnetic force received by the mover main structure 3 is the superposition of the magnetic pulling forces in the leftward direction from the magnetic fields of the second outer stator 2 and the first outer stator 1 on the left side and the magnetic pulling force in the rightward direction from the magnetic field of the second outer stator 2 on the right side. Since the magnetic field intensity of the second outer stator 2 on the left side is higher than that of the second outer stator 2 on the right side, the magnetic pulling force generated by the second outer stator 2 as a whole shows a leftward direction, thereby driving the mover main structure 3 to move leftward. Conversely, by changing the current directions of all windings, a magnetic pulling force in the rightward direction can be generated on the mover main structure, driving the mover main structure to move rightward.

Claims

1. A high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor, comprising a housing (7), an annular outer stator structure, a mover main structure (3) and an inner stator structure (6), wherein the mover main structure (3) is located in an inner cavity of the outer stator, and the mover main structure (3) is nested on the outer side of the inner stator structure (6), forming an inner air gap between the two, characterized in that: Both ends of the housing (7) are covered and connected with end covers (8); the inner wall of the housing (7) is provided with external stator positioning teeth (621) for fixing the position of the external stator structure; the external stator structure comprises three stators, wherein a first external stator (1) assembled with a pure iron core is located in the middle, and second external stators (2) with embedded permanent magnets are symmetrically distributed at the left and right ends, and two adjacent external stators are spaced by an external stator fixing ring; the mover main structure (3) comprises a mover non-magnetic support core (331), a first permanent magnet (31) and a mover magnetic core (32); an external air gap is uniformly formed between the first permanent magnet (31) and the mover magnetic core (32) and the external stator; and mover support accessories (4) are symmetrically placed at both ends of the mover main structure (6).

2. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 1, characterized in that: The first outer stator (1) comprises a first outer stator body (11); the first outer stator body (11) comprises a C-shaped first outer stator core (111), a first outer stator tooth feeler (112) and a first outer stator slot (113); the first outer stator core (111) is a circular ring structure; the first outer stator tooth feeler (112) is a right-angled trapezoidal structure on the inner side of the tooth; an annular air gap is left between the first outer stator tooth feelers (112) at the left and right ends; an annular gap formed by the C-shaped first outer stator core (111) and the first outer stator tooth feeler (112) is the first outer stator slot (113); the first outer stator winding coil (13) is placed in the first outer stator slot (113); and is fixed by a first outer stator positioning ring (12).

3. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 2, characterized in that: The first outer stator positioning ring (12) is provided with a first outer stator positioning ring protrusion (122) of a fan-shaped structure, which plays a role in fastening the stator block of the first outer stator core (111).

4. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 2, characterized in that: The second outer stator (2) comprises a second outer stator core (21), the second outer stator core (21) being a T-shaped structure, comprising a second outer stator core yoke (211), a second outer stator core tooth (212) and a second outer stator core tooth antenna (213), the second outer stator core tooth antenna (213) being located at two ends of the second outer stator core tooth (212) close to the inner circle; second permanent magnets (23) with opposite magnetization directions are distributed at two ends of the second outer stator core yoke (211), and the second outer stator winding (22) is wound around the second outer stator core tooth (212); the second stator cores (21) and the second permanent magnets (23) are both 2N in number and are spliced ​​in the circumferential direction to form a circular second outer stator (2); the number of the second outer stator cores (21) is the same as the number of stator blocks of the first outer stator core (111), and the two are aligned along the center position, and N is a positive integer.

5. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 4, characterized in that: The inner diameter of the first outer stator positioning ring (12) is greater than the inner diameter of the second outer stator core yoke (211); and the inner diameter of the circular ring formed by splicing the first outer stator body (11) should be equal to the inner diameter of the second outer stator core (21).

6. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 4, characterized in that: The mover main structure (3) comprises a first permanent magnet (31), a mover magnetic conductive core (32) and a mover non-magnetic conductive support (33); the first permanent magnet (31) is a tile-type structure, and 2N tile-type first permanent magnets (31) are spliced ​​into a magnetic ring; the mover magnetic conductive core (32) is a ring-shaped structure symmetrically distributed at both ends of the first permanent magnet (31); 2N mover magnetic conductive core oblique grooves (322) are provided on the outer surface of the mover magnetic conductive core (32); a mover magnetic conductive core parallel tooth (321) is formed between two adjacent mover magnetic conductive core oblique grooves (322); the width of the mover magnetic conductive parallel tooth (321) is equal to the width of the ends of two second outer stator core antennae (213) located on the same tooth; and a mover magnetic conductive core positioning groove (323) is provided on the inner wall of the mover magnetic conductive core (32) at the position where the centers of the mover magnetic conductive core parallel teeth are aligned, and N is a positive integer.

7. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 6, characterized in that: The outer surface of the mover non-magnetic support (33) is provided with axially spaced teeth (331), first permanent magnet positioning teeth (332) and mover magnetic core positioning teeth (333); a rectangular through hole (334) having an area smaller than the area of ​​the slot is provided in the slot formed by each of the mover magnetic core positioning teeth (333); the mover magnetic core positioning teeth (333) are symmetrically distributed at both ends of the first permanent magnet positioning teeth (332) and are separated in the middle by axially spaced teeth (331); the mover magnetic core positioning teeth (333) and the first permanent magnet positioning teeth (332) are symmetrically distributed at both ends of the first permanent magnet positioning teeth (332) and are separated in the middle by axially spaced teeth (331); the mover magnetic core positioning teeth (333) and the first permanent magnet positioning teeth (332) are symmetrically distributed at both ends of the first permanent magnet positioning teeth (332). 32) are evenly distributed in the circumferential direction on the surface of the mover non-magnetic support (33), the number of which is 2N, where N is a positive integer, and the angle between the mover magnetic core positioning tooth (333) and the first permanent magnet positioning tooth (332) is 90 / N degrees, where N is a positive integer; the mover non-magnetic support connecting column (335) is symmetrically distributed at both ends of the mover non-magnetic support (33), the center of the mover non-magnetic support connecting column (335) is aligned with the mover magnetic core positioning tooth (333), and a threaded hole is processed at the center position of its end face.

8. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 7, characterized in that: The mover support accessories (4) are symmetrically distributed at both ends of the mover main structure (3), and the mover support accessories (4) include a mover claw-type support disk (41) and a spring assembly (42); an even number of fan-shaped through holes (412) are evenly opened at the end of the mover claw-type support disk (41) along the circumferential direction, and a mover claw-type support tooth (411) is formed between two of the fan-shaped through holes (412); a circular through hole is opened on the outer side of the mover claw-type support tooth (411) and is aligned with the threaded hole position of the mover non-magnetic support connecting column (335); the mover claw-type A mounting through hole (413) is provided at the center of the support disk (41) for fastening and mounting the output shaft (5); the spring assembly (42) comprises a spring (421) and a spring support disk (422); the spring support disk (422) is a cylindrical structure with an opening at one end and a through hole is provided at the center of the bottom; the spring support disk (422), the mover claw-type support disk (41) and the mover non-magnetic support (33) are fastened and connected by screws; one end of the spring (421) is placed in the spring support disk (422), and the other end is fastened and connected to the end cover (8).

9. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 8, characterized in that: The inner stator structure (6) comprises an inner stator core body (61) for providing a main magnetic circuit, a fastening support plate (62) for fixing the inner stator core in a circular shape, and a support column (63) for fixing the position of the inner stator. The inner stator core body (61) is a circular ring structure, and its two end surfaces are provided with inner stator positioning grooves (611) for positioning and assembling. The inner stator positioning grooves (611) cooperate with positioning teeth (621) on the end surface of the fastening support plate (62). The fastening support plate (62) is symmetrically distributed on both sides of the inner stator core body (61). The other end surface is provided with support column threaded holes (622) for installing and fixing the support column (63). The number of the support column threaded holes (622) is the same as the number of the claw-type support teeth (411) of the mover. The support column threaded holes (622) are evenly distributed along the circumferential direction. On the end surface of the fastening support disk (62), the radius of the circle where the center of the circle is located is smaller than the outer diameter of the fastening support disk (62), and on the inner side of the circle smaller than the distribution circle of the support column threaded holes (622), there are fastening circular through holes (623), and the fastening support disks at the left and right ends are fastened by passing steel bars through the fastening circular through holes (623); fan-shaped through holes (624) are evenly opened on the end surface of the fastening support disk (62) along the circumferential direction; a bearing mounting hole (625) is provided at the center of the fastening support disk (62) for fastening and mounting the linear bearing (9); the fixed support columns (63) are symmetrically distributed on both sides of the inner stator fastening support disk (62), one end of which is fastened to the fastening support disk (62) and the other end is fastened to the end cover (8), and the fixed support column (63) is located at the center of the fan-shaped through hole (412) on the movable claw-type support (41).

10. The high-power multi-stator single-phase cylindrical permanent magnet linear oscillation motor according to claim 8, characterized in that: The output shaft (5) of the motor comprises an output shaft sliding rod (51), a fastening fitting (52) and an output shaft output end (53); the output shaft sliding rod (51) is slidably connected to the linear bearing (9); the fastening fittings (52) are located at both ends of the output shaft sliding rod (51) and are fixed in mounting through holes of the mover support disk (41), so that the output shaft sliding rod (51) and the mover claw-type support disk (41) are fastened and connected; the output shaft output end (53) is firmly mounted on the end of the fastening fitting, thereby being connected to an external load.

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