A bidirectional shaftless brushless motor based on electromagnetic field

Abstract

The utility model provides a kind of bidirectional shaftless brushless motor based on electromagnetic field, including shell, double-end vertical magnetic core winding frame, front rotating shaft sleeve, rear rotating shaft sleeve, two bearings, control circuit, double-end vertical magnetic core winding frame includes support ring, winding column, sector plate, front rotating shaft sleeve, rear rotating shaft sleeve all include output sleeve, outer ring part, the both ends of double-end vertical magnetic core winding frame are provided with W-phase winding group, U-phase winding group, V-phase winding group, W-phase enameled wire, U-phase enameled wire, V-phase enameled wire are wound on different winding column respectively, W-phase enameled wire, U-phase enameled wire, V-phase enameled wire one end is connected and another end is electrically connected with control circuit, there are magnet on outer ring part and evenly distributed, can reduce the radial thickness of motor, can more greatly increase the passing space of airflow or water flow, and can realize front rotating shaft sleeve and rear rotating shaft sleeve same direction rotation or reverse rotation, satisfy multiple use requirements.

Description

Technical Field

[0001] This utility model relates to the field of brushless motor technology, and more particularly to a bidirectional shaftless brushless motor based on the electromagnetic field. Background Technology

[0002] Most motors on the market have solid shafts. Due to the presence of solid shafts, when they are used for aerodynamics or underwater propulsion, the blades need to be mounted on solid shafts, which can easily lead to problems such as the solid shaft getting entangled in objects or being hit by objects. Therefore, shaftless motors have emerged, which use cylindrical output shafts instead of solid shafts to meet the needs of different applications.

[0003] Existing shaftless motors have a complex structure, making disassembly and maintenance cumbersome. The winding of their magnetic core frame is radial, and the rotor magnets are radially arranged inside the windings. This type of shaftless motor results in a smaller inner diameter of the cylindrical output shaft and a thicker radial thickness of the motor, which reduces the space for airflow or water flow within the cylindrical output shaft, leading to insufficient motor performance. Summary of the Invention

[0004] The problem to be solved by this utility model is to provide a bidirectional shaftless brushless motor based on the electromagnetic field, which reduces the radial thickness of the motor, can maximize the passage space for airflow or water flow, and improve the performance of the motor.

[0005] To solve the above technical problems, this utility model provides a bidirectional shaftless brushless motor based on the electromagnetic field, comprising a housing, a double-ended vertical magnetic core winding frame, a front rotating shaft assembly, a rear rotating shaft assembly, two bearings, and a control circuit. The double-ended vertical magnetic core winding frame includes a support ring, winding posts evenly distributed on both ends of the support ring, and a fan-shaped plate connected to one end of the winding posts. The winding posts on both ends of the support ring are symmetrically arranged, and the number of winding posts on both ends of the support ring is 'a', where 'a' is an integer multiple of 3. The double-ended vertical magnetic core winding frame is fixedly installed inside the housing. Both the front and rear rotating shaft assemblies include an output sleeve and an outer ring connected to the periphery of the output sleeve. One end of the output sleeve is connected to the inner wall of the housing through one of the bearings. The outer ring is located on one side of the fan-shaped plate. Both ends of the double-ended vertical magnetic core winding frame are equipped with W-phase winding groups, U-phase winding groups, and V-phase winding groups. The W-phase winding group is formed by winding W-phase enameled wire onto the winding column according to the rule of winding every two winding columns. The U-phase winding group is formed by winding U-phase enameled wire onto the winding column according to the rule of winding every two winding columns. The V-phase winding group is formed by winding V-phase enameled wire onto the winding column according to the rule of winding every two winding columns. The W-phase, U-phase, and V-phase enameled wires are wound on different winding columns. One end of the W-phase, U-phase, and V-phase enameled wires is connected and the other end is electrically connected to the control circuit. There are b receiving holes evenly distributed on the outer ring. Each receiving hole is equipped with a magnet. The bottom polarities of adjacent magnets are opposite.

[0006] Preferably, b = a / 3*4.

[0007] Preferably, b = a / 3 * 2.

[0008] Preferably, the total area of ​​one end face of the a sector plates is equal to the total area of ​​one end face of the b magnets.

[0009] Preferably, the outer edge of the support ring is uniformly distributed with wire grooves, and the number of wire grooves is c, where c = a.

[0010] Preferably, it also includes an upper end cover and a lower end cover. The bottom outer edge of the upper end cover and the top outer edge of the lower end cover are provided with annular clearance grooves that match the ends of the outer shell. The top and bottom ends of the outer shell are respectively assembled on the annular clearance grooves of the upper end cover and the lower end cover. A plurality of mounting screw holes are distributed on the wall surface of the annular clearance grooves. The ends of the outer shell are provided with countersunk holes that correspond to the mounting screw holes. The countersunk holes and the mounting screw holes are connected by screws.

[0011] Preferably, the inner edge of the outer shell is provided with an annular limiting groove that matches the support ring, the top surface of the support ring contacts one end surface of the annular limiting groove, a support ring is engaged between the bottom of the support ring and the bearing, one end of the support ring is provided with a wire outlet notch, and the outer shell is provided with a wire outlet hole communicating with the wire outlet notch.

[0012] Preferably, the double-ended vertical magnetic core winding frame is made of magnetically conductive metal.

[0013] The beneficial effects of this utility model are as follows: This utility model provides a bidirectional shaftless brushless motor based on the electromagnetic field. It supplies power to the W-phase, U-phase, and V-phase enameled wires and controls the current flow direction through a control circuit. The control circuit can realize functions such as forward and reverse rotation, start and stop, and speed adjustment of the front and rear rotating shaft assemblies. The W-phase, U-phase, and V-phase enameled wires are wound on different winding posts according to a rule of every two winding posts between each phase, forming W-phase, U-phase, and V-phase winding groups at both ends of the double-ended vertical magnetic core winding frame. First, magnets are sequentially inserted into the receiving holes of the outer ring according to polarity reversal. Then, the double-ended vertical magnetic core winding frame is assembled into the housing. Next, the support ring is inserted from the bottom side of the housing. The bearing is installed at one end of the output sleeve. Finally, the front and rear rotating shaft assemblies with the bearings are respectively assembled into the front and rear ends of the housing. The support ring is clamped between the bottom of the support ring and the bearing. The inner wall of the outer shell and one end of the output sleeve are connected by the bearing. The upper and lower end covers are respectively assembled at both ends of the outer shell. The sector plate is opposite to one end of the magnet. It has the advantages of simple structure, easy disassembly and low cost. The winding direction on the winding column is axial. The magnet is also axially set on the upper side of the winding column. It can reduce the radial thickness of the motor and maximize the passage space of air or water flow, thereby improving the performance of the motor. It can realize the front rotating shaft assembly and the rear rotating shaft assembly to rotate in the same direction or in opposite directions to meet a variety of usage requirements. Attached Figure Description

[0014] Figure 1 A schematic diagram illustrating the external structure of this utility model is provided.

[0015] Figure 2 A cross-sectional view of the present invention is shown.

[0016] Figure 3 An exploded view of the present invention is shown.

[0017] Reference numerals: 1. Outer shell, 100. Countersunk hole, 101. Annular limiting groove, 102. Cable outlet hole, 2. Double-ended vertical magnetic core winding frame, 20. Support ring, 200. Cable passage groove, 21. Winding post, 22. Fan-shaped plate, 3. Front rotating shaft assembly, 30. Output sleeve, 31. Outer ring, 310. Receiving hole, 32. Magnet, 4. Rear rotating shaft assembly, 5. Bearing, 6. Upper end cover, 60. Annular clearance groove, 61. Mounting screw hole, 7. Lower end cover, 8. Support ring, 80. Cable outlet notch. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure.

[0019] Based on the embodiments described in this disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this disclosure.

[0020] refer to Figure 1-3 .

[0021] This utility model provides a bidirectional shaftless brushless motor based on the electromagnetic field, comprising a housing 1, a double-ended vertical magnetic core winding frame 2, a front rotating shaft assembly 3, a rear rotating shaft assembly 4, two bearings 5, and a control circuit. The double-ended vertical magnetic core winding frame 2 includes a support ring 20, winding posts 21 evenly distributed on both ends of the support ring 20, and a sector plate 22 connected to one end of the winding posts 21. The winding posts 21 on both ends of the support ring 20 are symmetrically arranged, and the number of winding posts 21 on both ends of the support ring 20 is 'a', where 'a' is an integer multiple of 3. The double-ended vertical magnetic core winding frame 2 is fixedly installed inside the housing 1. The front rotating shaft assembly 3 and the rear rotating shaft assembly 4 each include an output sleeve 30 and an outer ring portion 31 connected to the periphery of the output sleeve 30. One end of the output sleeve 30 is connected to the inner wall of the housing 1 through one of the bearings 5. The outer ring portion 31 is located on one side of the sector plate 22. On the side, both ends of the double-ended vertical magnetic core winding frame 2 are provided with W-phase winding group, U-phase winding group and V-phase winding group. The W-phase winding group is formed by winding W-phase enameled wire on the winding post 21 according to the rule of winding every two winding posts 21. The U-phase winding group is formed by winding U-phase enameled wire on the winding post 21 according to the rule of winding every two winding posts 21. The V-phase winding group is formed by winding V-phase enameled wire on the winding post 21 according to the rule of winding every two winding posts 21. The W-phase enameled wire, U-phase enameled wire and V-phase enameled wire are wound on different winding posts 21 respectively. One end of the W-phase enameled wire, U-phase enameled wire and V-phase enameled wire are connected and the other end is electrically connected to the control circuit. b receiving holes 310 are evenly distributed on the outer ring 31. Each receiving hole 310 is provided with a magnet 32. The bottom polarities of two adjacent magnets 32 are opposite.

[0022] Specifically, the W-phase, U-phase, and V-phase enameled wires can be single-core or multi-strand enameled wires. The enameled wires are primarily used to wind around the winding posts 21, generating intermittent magnetism when energized to drive the magnet 32, thereby rotating the front rotating shaft assembly 3 and the rear rotating shaft assembly 4. According to design rules, the number of winding posts 21 on both ends of the support ring 20 should be an integer multiple of 3. The attached diagram illustrates a case where both ends of the support ring 20 have 21 winding posts. Given any starting point for the winding posts, these 21 winding posts are designated as No. 1, No. 2, No. 3…20, No. 21. According to design rules, to improve performance and application flexibility, the winding posts 21 on the double-ended vertical magnetic core winding frame 2 have multiple winding methods, each with different effects.

[0023] First winding method:

[0024] Front rotating shaft assembly side:

[0025] The winding posts through which the enameled wire of the W phase winding group passes are: No. 1, No. 4, No. 7, No. 10, No. 13, No. 16, and No. 19;

[0026] The winding posts through which the U-phase enameled wire of the U-phase winding group is wound are: No. 2, No. 5, No. 8, No. 11, No. 14, No. 17, and No. 20;

[0027] The winding posts through which the V-phase enameled wire of the V-phase winding group is wound are: No. 3, No. 6, No. 9, No. 12, No. 15, No. 18, and No. 21.

[0028] The control circuit can use a conventional three-phase motor circuit. The control circuit has W-phase connection terminal, U-phase connection terminal, and V-phase connection terminal. The connection method is to connect the ends of the W-phase enameled wire, U-phase enameled wire, and V-phase enameled wire to each other, and then lead out the ends of the wires. The other ends of the W-phase enameled wire, U-phase enameled wire, and V-phase enameled wire are respectively connected to the W-phase connection terminal, U-phase connection terminal, and V-phase connection terminal of the control circuit, which can realize the forward rotation of the front rotating shaft assembly 3.

[0029] Rear rotating shaft assembly side:

[0030] The winding posts through which the enameled wire of the W phase winding group passes are: No. 1, No. 4, No. 7, No. 10, No. 13, No. 16, and No. 19;

[0031] The winding posts through which the U-phase enameled wire of the U-phase winding group is wound are: No. 2, No. 5, No. 8, No. 11, No. 14, No. 17, and No. 20;

[0032] The winding posts through which the V-phase enameled wire of the V-phase winding group is wound are: No. 3, No. 6, No. 9, No. 12, No. 15, No. 18, and No. 21.

[0033] After connecting the ends of the W-phase enameled wire, U-phase enameled wire, and V-phase enameled wire to each other, and then leading out the ends of the wires, connect the other ends of the W-phase enameled wire, U-phase enameled wire, and V-phase enameled wire to the W-phase connection terminal, U-phase connection terminal, and V-phase connection terminal of the control circuit, respectively, so as to realize the reverse rotation of the rear rotating shaft assembly 4.

[0034] The second winding method:

[0035] Front rotating shaft assembly side:

[0036] The winding posts through which the enameled wire of the W phase winding group passes are: No. 1, No. 4, No. 7, No. 10, No. 13, No. 16, and No. 19;

[0037] The winding posts through which the U-phase enameled wire of the U-phase winding group is wound are: No. 2, No. 5, No. 8, No. 11, No. 14, No. 17, and No. 20;

[0038] The winding posts through which the V-phase enameled wire of the V-phase winding group is wound are: No. 3, No. 6, No. 9, No. 12, No. 15, No. 18, and No. 21.

[0039] After connecting the ends of the W-phase, U-phase, and V-phase enameled wires to each other, and then leading out the ends of the wires, connect the other ends of the W-phase, U-phase, and V-phase enameled wires to the W-phase connection terminal, U-phase connection terminal, and V-phase connection terminal of the control circuit, respectively, so as to realize the forward rotation of the front rotating shaft assembly 3.

[0040] Rear rotating shaft assembly side:

[0041] The winding posts through which the V-phase enameled wire of the V-phase winding group is wound are: No. 1, No. 4, No. 7, No. 10, No. 13, No. 16, and No. 19;

[0042] The winding posts through which the U-phase enameled wire of the U-phase winding group is wound are: No. 2, No. 5, No. 8, No. 11, No. 14, No. 17, and No. 20;

[0043] The winding posts through which the enameled wire of the W phase winding group passes are: No. 3, No. 6, No. 9, No. 12, No. 15, No. 18, and No. 21.

[0044] After connecting the ends of the W-phase, U-phase, and V-phase enameled wires to each other, and then leading out the ends of the wires, connect the other ends of the W-phase, U-phase, and V-phase enameled wires to the W-phase connection terminal, U-phase connection terminal, and V-phase connection terminal of the control circuit, respectively, so as to realize the forward rotation of the rear rotating shaft assembly 4.

[0045] The third winding method:

[0046] The W-phase winding groups on side 3 of the front rotating shaft assembly and side 4 of the rear rotating shaft assembly share a set of W-phase enameled wire; the U-phase winding groups on side 3 of the front rotating shaft assembly and side 4 of the rear rotating shaft assembly share a set of U-phase enameled wire; and the V-phase winding groups on side 3 of the front rotating shaft assembly and side 4 of the rear rotating shaft assembly share a set of V-phase enameled wire. The winding methods are divided into two types:

[0047] Firstly:

[0048] The winding posts that the W-phase enameled wire passes through on both the front and rear rotating shaft assembly sides are: No. 1, No. 4, No. 7, No. 10, No. 13, No. 16, and No. 19.

[0049] The U-phase enameled wires are wound around the following posts on both the front and rear rotating shaft assembly sides: No. 2, No. 5, No. 8, No. 11, No. 14, No. 17, and No. 20.

[0050] The V-phase enameled wires are wound around the following posts on both the front and rear rotating shaft assembly sides: No. 3, No. 6, No. 9, No. 12, No. 15, No. 18, and No. 21.

[0051] Secondly:

[0052] The winding posts through which the W-phase enameled wire winds on the front rotating shaft assembly side are: No. 1, No. 4, No. 7, No. 10, No. 13, No. 16, and No. 19. The winding posts through which the W-phase enameled wire winds on the rear rotating shaft assembly side are: No. 2, No. 5, No. 8, No. 11, No. 14, No. 17, and No. 20.

[0053] The winding posts through which the U-phase enameled wire winds on the front rotating shaft assembly side are: No. 2, No. 5, No. 8, No. 11, No. 14, No. 17, and No. 20. The winding posts through which the U-phase enameled wire winds on the rear rotating shaft assembly side are: No. 3, No. 6, No. 9, No. 12, No. 15, No. 18, and No. 21.

[0054] The winding posts through which the V-phase enameled wire winds on the front rotating shaft assembly side are: No. 3, No. 6, No. 9, No. 12, No. 15, No. 18, and No. 21. The winding posts through which the V-phase enameled wire winds on the rear rotating shaft assembly side are: No. 1, No. 4, No. 7, No. 10, No. 13, No. 16, and No. 19.

[0055] The above method involves a group of W-phase enameled wires passing through winding posts 1, 4, 7, 10, 13, 16, and 19 of the front and rear rotating shaft kits. The U-phase and V-phase enameled wires are the same. This winding method allows a single group of W, U, and V wires to enable the front and rear rotating shaft kits to rotate simultaneously in a fixed manner. It can be regarded as the front and rear rotating shaft kits being the same wheel. The advantage is that there are fewer connection points, making it suitable for use in fixed scenarios. The disadvantage is that it has lower flexibility.

[0056] The installation method of magnet 32 ​​depends on the winding method of winding post 21. Different winding methods result in different arrangements of magnet 32. For example, if the winding method of winding post 21 is W corresponding to winding post 1, U corresponding to winding post 2, and V corresponding to winding post 3, then the magnetic orientation of the bottom of magnet 32 ​​is arranged as follows: the first receiving hole is the N pole, the second receiving hole is the S pole, the third receiving hole is the N pole, the fourth receiving hole is the S pole, and so on. If the winding method of winding post 21 is W corresponding to winding posts 1 and 2, U corresponding to winding posts 3 and 4, and V corresponding to winding posts 5 and 6, then the magnetic orientation of the bottom of magnet 32 ​​is arranged as follows: the first and second receiving holes are the N pole, the third and fourth receiving holes are the S pole, the fifth and sixth receiving holes are the N pole, the seventh and eighth receiving holes are the S pole, and so on.

[0057] The front rotating shaft assembly 3 and the rear rotating shaft assembly 4 can be modified according to functional requirements to change the inner structure of the output sleeve 30. For example, when applied to a scenario that propels airflow, they can be designed as fan blades that conform to airflow. When applied to a scenario that propels water flow, they can be changed to propellers that conform to water flow. Gears can also be added to the inner side of the output sleeve 30 and connected to a reduction gear to convert part of the rotation speed into power output. Users can assemble and apply them to various usage environments.

[0058] Based on the above embodiments, b = a / 3*4. The attached figure illustrates a case where both ends of the double-ended vertical magnetic core winding frame 2 have 21 winding posts 21, and the corresponding number of receiving holes 310 is 28, that is, there are 28 magnets 32 on the outer ring 31.

[0059] Based on the above embodiments, b = a / 3*2. The attached figure illustrates a case where the double-ended vertical magnetic core winding frame 2 has 21 winding posts 21, and the corresponding number of receiving holes 310 is 14, that is, there are 14 magnets 32 on the outer ring 31.

[0060] Based on the above embodiments, the total area of ​​one end face of the a sector plate 22 is equal to the total area of ​​one end face of the b magnets 32.

[0061] Based on the above embodiment, the outer edge of the support ring 20 is uniformly distributed with wire grooves 200, and the number of wire grooves 200 is c, where c = a. When the enameled wire is wound between different winding posts 21, it can transition through the wire grooves 200, which facilitates the arrangement of the winding.

[0062] Based on the above embodiments, it also includes an upper end cover 6 and a lower end cover 7. The bottom outer edge of the upper end cover 6 and the top outer edge of the lower end cover 7 are provided with annular clearance grooves 60 that match the ends of the outer shell 1. The top and bottom ends of the outer shell 1 are respectively assembled on the annular clearance grooves 60 of the upper end cover 6 and the lower end cover 7. A plurality of mounting screw holes 61 are distributed on the wall surface of the annular clearance groove 60. The end of the outer shell 1 is provided with countersunk holes 100 corresponding to the mounting screw holes 61. The countersunk holes 100 and the mounting screw holes 61 are connected by screws, which has the advantages of convenient disassembly and assembly and compact structure.

[0063] Based on the above embodiments, the inner edge of the outer shell 1 is provided with an annular limiting groove 101 that matches the support ring 20. The top surface of the support ring 20 contacts one end surface of the annular limiting groove 101. A support ring 8 is engaged between the bottom of the support ring 20 and the bearing 5. One end of the support ring 8 is provided with a wire outlet notch 80. The outer shell 1 is provided with a wire outlet hole 102 that communicates with the wire outlet notch 80. The support ring 8 can limit the double-ended vertical magnetic core winding frame 2 and the bearing 5. One end of the W-phase enameled wire, U-phase enameled wire, and V-phase enameled wire is led out through the wire outlet notch 80 and the wire outlet hole 102.

[0064] Based on the above embodiments, the double-ended vertical magnetic core winding frame 2 is made of magnetically conductive metal. After the winding is energized, the sector plate 22 generates magnetism, thereby generating a driving force on the magnet 32.

[0065] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A bidirectional shaftless brushless motor based on the electromagnetic field, characterized by, The device includes a housing, a double-ended vertical magnetic core winding frame, a front rotating shaft assembly, a rear rotating shaft assembly, two bearings, and a control circuit. The double-ended vertical magnetic core winding frame includes a support ring, winding posts evenly distributed on both ends of the support ring, and a fan-shaped plate connected to one end of each winding post. The winding posts on both ends of the support ring are symmetrically arranged, and the number of winding posts on both ends of the support ring is 'a', where 'a' is an integer multiple of 3. The double-ended vertical magnetic core winding frame is fixedly installed inside the housing. Both the front and rear rotating shaft assemblies include an output sleeve and an outer ring connected to the periphery of the output sleeve. One end of the output sleeve is connected to the inner wall of the housing via one of the bearings. The outer ring is located on one side of the fan-shaped plate. Both ends of the double-ended vertical magnetic core winding frame are provided with W... The system comprises three winding groups: a W-phase winding group, a U-phase winding group, and a V-phase winding group. The W-phase winding group is formed by winding W-phase enameled wire around the winding posts according to the rule of winding every two winding posts. The U-phase winding group is formed by winding U-phase enameled wire around the winding posts according to the rule of winding every two winding posts. The V-phase winding group is formed by winding V-phase enameled wire around the winding posts according to the rule of winding every two winding posts. The W-phase, U-phase, and V-phase enameled wires are wound on different winding posts. One end of each W-phase, U-phase, and V-phase enameled wire is connected to the other end, and the other end is electrically connected to the control circuit. The outer ring has b evenly distributed receiving holes, and each receiving hole contains a magnet. The bottom polarities of adjacent magnets are opposite.

2. The bidirectional shaftless brushless motor based on the electromagnetic field according to claim 1, characterized in that, b = a / 3 * 4.

3. The bidirectional shaftless brushless motor based on the electromagnetic field according to claim 1, characterized in that, b = a / 3 * 2.

4. A bidirectional shaftless brushless motor based on the electromagnetic field according to claim 2 or 3, characterized in that, The total area of ​​one end face of each of the a sector plates is equal to the total area of ​​one end face of each of the b magnets.

5. A bidirectional shaftless brushless motor based on the electromagnetic field according to claim 4, characterized in that, The outer edge of the support ring is uniformly distributed with wire grooves, and the number of wire grooves is c, where c = a.

6. A bidirectional shaftless brushless motor based on the electromagnetic field according to claim 5, characterized in that, It also includes an upper end cover and a lower end cover. The bottom outer edge of the upper end cover and the top outer edge of the lower end cover are provided with annular clearance grooves that match the ends of the outer shell. The top and bottom ends of the outer shell are respectively assembled on the annular clearance grooves of the upper end cover and the lower end cover. A plurality of mounting screw holes are distributed on the wall surface of the annular clearance groove. The end of the outer shell is provided with countersunk holes that correspond to the mounting screw holes. The countersunk holes and the mounting screw holes are connected by screws.

7. A bidirectional shaftless brushless motor based on the electromagnetic field according to claim 6, characterized in that, The inner edge of the outer shell is provided with an annular limiting groove that matches the support ring. The top surface of the support ring contacts one end surface of the annular limiting groove. A support ring is engaged between the bottom of the support ring and the bearing. One end of the support ring is provided with a wire outlet notch. The outer shell is provided with a wire outlet hole that communicates with the wire outlet notch.

8. A bidirectional shaftless brushless motor based on the electromagnetic field according to claim 7, characterized in that, The double-ended vertical magnetic core winding frame is made of magnetically conductive metal.

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