CN212909314U

CN212909314U - Permanent magnet engine

Info

Publication number: CN212909314U
Application number: CN202021627313.7U
Authority: CN
Inventors: 肖华清
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-07
Filing date: 2020-08-07
Publication date: 2021-04-06
Anticipated expiration: 2030-08-07

Abstract

The present application provides a permanent magnet motor. The permanent magnet motor includes: a stationary frame, a stator assembly, and a rotor assembly. The stator assembly includes: the traction rod is fixedly connected with the permanent magnet stator, and the other end of the traction rod extends out of the fixed frame to pull the permanent magnet stator to move along the axial direction under the action of external force; the rotor assembly includes: the rotor is parallel to and opposite to the permanent magnet stator and comprises a mounting hub and a plurality of wedge-shaped permanent magnets; the wedge-shaped permanent magnets are fixedly arranged around the mounting hub at the same inclination angle, and the wedge-shaped permanent magnets are opposite to the permanent magnet stator in the same pole; and one end of the power output shaft is fixedly connected with the mounting hub, and the other end of the power output shaft extends out of the fixed frame. The permanent magnet engine has simple structure, easy operation and maintenance, and no pollution and noise.

Description

Permanent magnet engine

Technical Field

The utility model relates to a power parts technical field to more specifically, relate to a permanent magnet engine.

Background

The power is not only the heart driving the mechanical operation, but also a second engine promoting the progress of human society. After the steam engine of the watt utility model, mankind has tasted the welfare that the power machinery brought for the first time. Since then, people have been constantly striving to find more efficient, safer, more environmentally friendly, and easier to manipulate mechanical power. To date, the internal combustion engine has become the most widely used mechanical power and the most convenient operation in the world. However, the internal combustion engine still has a plurality of short plates with low thermal efficiency, serious environmental pollution, loud noise, non-sustainable fossil fuel and the like. Therefore, in recent years, solid-state battery power is being attempted to replace the "dominating" status of internal combustion engines. In terms of the current technology, solid-state batteries still have many bottlenecks such as low energy density, long charging time, short endurance time and the like; thus, it is foreseen that: over a considerable period of time, both internal combustion engine power and solid-state battery power will coexist for long periods of time. Meanwhile, people can find other mechanical power steps which are more efficient, safer, more environment-friendly and easier to control without stop. In view of the above facts, the development of a power mechanism which is more efficient, safer, more environmentally friendly and easier to operate has become a hotspot and difficulty in the field.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the application provides a permanent magnet engine based on magnetic force and a control method thereof, and the principle is that permanent magnetism is utilized to drive a mechanical structure to operate. The engine has the advantages of high efficiency, no pollution, low noise and simple processing and manufacturing.

In a first aspect, the present application provides a permanent magnet engine comprising a stationary frame, a stator assembly and a rotor assembly, wherein the stator assembly comprises: a permanent magnet stator having a disk shape and located inside the fixed frame; one end of the traction rod is fixedly connected with the permanent magnet stator, and the other end of the traction rod extends out of the fixed frame so as to draw the permanent magnet stator to move along the axial direction of the traction rod under the action of external force; the rotor assembly includes: the rotor is positioned in the fixed frame, is parallel to and right opposite to the permanent magnet stator and comprises a mounting hub and a plurality of wedge-shaped permanent magnets, the wedge-shaped permanent magnets are fixedly mounted around the mounting hub at the same inclination angle relative to the horizontal plane, and the wedge-shaped permanent magnets and the permanent magnet stator are homopolarly opposite, so that repulsion generated when the wedge-shaped permanent magnets and the permanent magnet stator approach each other is exerted on the wedge-shaped permanent magnets, and the wedge-shaped permanent magnets drive the mounting hub to rotate; and one end of the power output shaft is fixedly connected with the mounting hub, and the other end of the power output shaft extends out of the fixed frame and is supported by a bearing fixed on the fixed frame. Based on the structure, the engine pushes the wedge-shaped permanent magnet by utilizing repulsion force generated by homopolar repulsion between the permanent magnets, so that the mounting hub and the power output shaft are driven to rotate around the rotation axis, and power is output. The engine is simple in structure, easy to operate and maintain, and free of pollution and noise.

In an embodiment of the first aspect, the rotor assembly further includes a sealing cover for sealing the rotor, the sealing cover includes a circumferential reinforcing ring, and an upper sealing plate and a lower sealing plate arranged at the top and the bottom of the circumferential reinforcing ring, one end of the wedge-shaped permanent magnet, which is far away from the mounting hub, is tightly connected with an inner side wall of the circumferential reinforcing ring, and the power output shaft penetrates through the lower sealing plate and seals a gap. Through the embodiment, huge resistance generated by exposure to air when the wedge-shaped permanent magnet rotates at high speed can be effectively avoided, and therefore output efficiency is improved.

In an embodiment of the first aspect, the rotor assembly further includes a rotor assembly support plate fixed to the power output shaft and fixedly mounted to a bottom of the lower sealing plate to support the sealing cap. By this embodiment, further support can be provided to the rotor assembly, thereby improving structural strength and stability.

In an embodiment of the first aspect, the stator assembly further includes a spring, which is sleeved on the drawbar and is located between the permanent magnet stator and the inner side surface of the fixed frame. With this embodiment, when the drawbar is released, the permanent magnet stator can be pushed to move toward the rotor assembly by the elastic force of the spring in the compressed state.

In an embodiment of the first aspect, the wedge-shaped permanent magnet is installed at an inclination angle of 40 ° to 45 °. With this embodiment, the thrust force exerted on the wedge-shaped permanent magnet can be maintained at a high level, thereby improving the output efficiency.

In an embodiment of the first aspect, a through hole is provided in the fixed frame for the passage of the drawbar, a drawbar guide is provided in the through hole, and the drawbar moves along the drawbar guide in the through hole. Through the embodiment, the traction rod can keep a constant traction direction without deviation, so that a constant relative posture is kept between the permanent magnet stator and the rotor, and the stability of output power is ensured.

In an embodiment of the first aspect, a haul tab is provided at an end of the tow bar located outside the fixed frame. Through this embodiment, can make to control more convenient.

In an embodiment of the first aspect, the stator assembly further includes a stator mounting plate, and two opposite side surfaces of the stator mounting plate are fixedly connected to the permanent magnet stator and the drawbar, respectively.

In an embodiment of the first aspect, the permanent magnet is a neodymium magnet, the drawbar, the fixed frame, the bearing, the power take-off shaft are made of an aluminum alloy material, and the seal cap and the mounting hub are made of a carbon fiber material. Through the embodiment, the interference of other parts to the magnetic field of the permanent magnet can be reduced, so that the maximum power output is ensured.

In an embodiment of the first aspect, a plurality of mounting bolts are provided on the side wall of the fixed frame. With this embodiment, the permanent magnet motor can be fixed to a mechanical device.

In an embodiment of the first aspect, one end of the power take-off shaft located outside the fixed frame is fixedly provided with a pulley.

In a second aspect, the present application also provides a method of controlling the permanent magnet motor of the first aspect and any embodiment thereof, the method comprising: the traction rod is pulled to enable the permanent magnet stator to move towards the rotor assembly along the axial direction, so that the permanent magnet stator and the rotor gradually approach to each other, and repulsion force generated by homopolar repulsion drives the wedge-shaped permanent magnet to drive the mounting hub and the power output shaft to rotate around a rotation axis; and the traction rod is pulled to enable the permanent magnet stator to move away from the rotor assembly along the axial direction, so that the permanent magnet stator and the rotor are gradually away from each other, and the mounting hub and the power output shaft gradually stop rotating due to the fact that repulsive force between the permanent magnet stator and the rotor is gradually reduced.

Compared with the prior power technology, the permanent magnet engine and the control method thereof have the advantages of being high in efficiency, free of pollution, low in noise, simple in processing and manufacturing and easy to maintain due to the fact that the magnetic force of the permanent magnet is used for driving the mechanical structure to operate.

The technical features mentioned above can be combined in various suitable ways or replaced by equivalent technical features as long as the object of the invention is achieved.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

fig. 1 shows a front view of a permanent magnet engine according to an embodiment of the invention;

fig. 2 shows a side view of a permanent magnet engine according to an embodiment of the invention;

FIG. 3 shows a schematic view of an assembly of a rotor and a seal housing according to an embodiment of the invention;

fig. 4 shows a schematic structural view of a rotor according to an embodiment of the invention;

fig. 5 shows a force diagram of a wedge-shaped permanent magnet according to an embodiment of the invention;

fig. 6 shows a schematic flow chart of a permanent magnet motor control method according to an embodiment of the present invention.

List of reference numerals:

110-a fixed frame; 111-mounting bolts; 120-a stator assembly; 121-a drawbar; 122-a permanent magnet stator; 123-a stator mounting plate; 124-a spring; 125-a traction guide rail; 126-traction connection; 130-a rotor assembly; 131-a rotor; 1311-mounting a hub; 1312-a wedge-shaped permanent magnet; 1313-the hub through-shaft hole; 132-a power take-off shaft; 133-a bearing; 134-a sealing cover; 1341-upper sealing plate; 1342-a circumferential reinforcement ring; 1343-lower sealing plate; 135-rotor assembly support plate; 136-a pulley; 140-bolt

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Fig. 1 and fig. 2 are a front view and a side view of a permanent magnet motor according to the present invention. As shown in fig. 1 and 2, the permanent magnet motor includes: a stationary frame 110, a stator assembly 120, and a rotor assembly 130, wherein the stationary frame 110 is used to house a portion of the motor assembly (i.e., a portion of the stator assembly 120 and the rotor assembly 130) and to connect the permanent magnet motor to external equipment; the stator assembly 120 and the rotor assembly 130 are applied to the rotor assembly 130 by a repulsive force generated when the magnets of the stator assembly and the rotor assembly 130 approach each other in the same polarity inside the fixed frame 110, so that the rotor assembly 130 is pushed to rotate, and power is output.

It should be appreciated that the stationary frame 110 described herein may take a variety of forms, such as a bracket or an enclosed container, etc., in which the stator assembly 120 and the rotor assembly 130 are partially received. For the purpose of illustration, the features of the present invention will be described below by way of example with reference to the accompanying drawings. It should be understood that other forms of the fixed frame 110 can also be adapted to the features and functions described below. The frame may be integrally formed, or may be formed by combining a plurality of separately formed components, which is not limited herein.

Specifically, as shown in fig. 1 and 2, the stator assembly 120 is disposed above the rotor assembly 130, and the two do not contact, and during use, the two are only infinitely close to each other depending on the output requirement of the power. Stator assembly 120 includes a drawbar 121 and a permanent magnet stator 122; the permanent magnet stator 122 is an integral disk-shaped permanent magnet capable of generating a uniform magnetic field, and has an upper surface with an N pole or an S pole and a lower surface with an S pole or an N pole. One end of the pulling rod 121 is fixedly connected to the upper surface of the permanent magnet stator 122, and the other end of the pulling rod 121 passes through a through hole (the diameter of the through hole is slightly larger than the outer diameter of the pulling rod 121) formed in the top wall of the fixing frame and extends out of the fixing frame 110, so that the pulling rod 121 can be pulled by an external force to drive the permanent magnet stator 122 to move along the axial direction (i.e., the vertical direction shown in fig. 1) of the pulling rod 121, so that the permanent magnet stator 122 can approach or depart from the rotor assembly 130. Optionally, a stator mounting plate 123 is further disposed between the traction rod 121 and the upper surface of the permanent magnet stator 122, and can be centrally connected to the upper surface of the permanent magnet stator 122 through, for example, a bolt 140, and is fixedly connected to one end of the traction rod 121, so that the traction rod 121 and the permanent magnet stator 122 are fixedly connected through the stator mounting plate 123, and the connection firmness of the two is increased.

In one embodiment, the stator assembly 120 further includes a spring 124 that fits over the pull rod 121 inside the stationary frame 110 and between the upper surface of the permanent magnet stator 122 or stator mounting plate 123 and the top inside of the stationary frame. In a state where the permanent magnet stator 122 is away from the rotor assembly 123 (i.e., a non-operating state), the spring 124 is in a compressed state; in a state where the permanent magnet stator 122 moves toward the rotor assembly 123 (i.e., an operating state), the spring 124 is gradually changed from a compressed state to a normal state or an extended state, and the compression force thereof can push the permanent magnet stator 122 to move toward the rotor assembly 123.

Preferably, in one embodiment, a traction guide 125 is fixedly disposed in a through hole opened at the top of the fixed frame 110, and extends in the through hole along the axial direction, and optionally extends to the outside of the fixed frame 110; the traction rod 121 can move up and down along the traction guide rail 125 along the axial direction, so that the movement stability of the traction rod 121 is increased, the deviation is prevented, and the permanent magnet stator 122 connected with the traction rod and the rotor keep a constant relative posture, thereby ensuring the stability of output power.

Optionally, the traction guide 125 is a circular tube, the inner surface of which is smooth and the inner diameter of which is slightly larger than the outer diameter of the traction rod 121, so as to ensure smooth sliding.

Optionally, a pulling connection member 126, such as a pulling loop or a hinge structure, is provided at the end of the pulling rod 121 that protrudes outside the fixed frame 110. In this way, the movement of the permanent magnet stator 122 inside the fixed frame can be controlled very easily.

In a preferred embodiment, the stator assembly 120 may further include a stator position maintaining part (not shown) for maintaining the stator assembly 120 in a proper position to prevent the stator assembly 120 from being accidentally moved to cause a malfunction in the non-operating state or the operating state. Alternatively, the stator position maintaining part may be provided outside the fixing frame 110 to facilitate the operation, and it overcomes the elastic force of the spring 124 by maintaining the traction bar 121 to be stationary at a proper position to maintain the stator assembly 120 in a stable state.

When the wedge-shaped permanent magnets arranged in an inclined manner rotate at a high speed, a very large resistance is generated if they are exposed to air, and therefore, as shown in fig. 3, in a preferred embodiment, the rotor assembly 130 may further include a sealing cap 134 for receiving a rotor 131 (described in detail in fig. 4) therein. The seal cover 134 includes an upper seal plate 1341, a circumferential reinforcement ring 1342, and a lower seal plate 1343; the upper and

lower sealing plates

1341 and 1343 are hermetically engaged with the circumferential reinforcement ring 1342 at the top and bottom thereof, respectively, to form a sealed inner space, thereby isolating the rotor 131 from the outside air. One end of each wedge-shaped permanent magnet 1312, far away from the mounting hub 1311, of the wedge-shaped permanent magnets 1312 is fixedly connected (e.g., riveted) with the inner side wall of the circumferential reinforcing ring 1342, and a hole (not shown) for the power output shaft 132 to pass through is formed in the lower sealing plate 1343, so that the rotor 131 and the sealing cover 134 can rotate synchronously; since the rotor 131 is located inside the hermetic cover 134 and isolated from the external air, the rotation of the rotor 131 is not resistant to the external air, thereby improving the power output efficiency.

It should be understood that to ensure the sealing effect of the sealing cover 134, a sealing rubber ring (not shown) may be disposed on the power output shaft 132 to realize a static seal between the power output shaft 132 and the hole.

Preferably, a vacuum environment is provided within the sealed enclosure 134.

In addition, in order to ensure excellent power output, the cross-sectional area of the permanent magnet stator 122 should be the same as that of the rotor assembly.

Preferably, the rotor assembly 130 may further include a rotor assembly support plate 135 disposed below the sealing cap 134, which may be fixedly disposed (e.g., welded) on the power output shaft 132 at a position where it can be attached to the lower surface of the lower sealing plate 1343 and fixed by the bolts 140, so as to provide further support for the assembly of the rotor 131 and the sealing cap 134, thereby improving the structural strength. It should be understood that the rotor assembly support plate 135 should be centrally apertured for the power take-off shaft 132 to pass through.

A detailed structural schematic diagram of the rotor assembly 130 provided by the present invention is shown in fig. 4. Referring to fig. 1, the rotor assembly 130 includes a rotor 131 and a power take-off shaft 132; one end of the power output shaft 132 is fixedly connected with the rotor 131, and the other end thereof is connected with the bearing 133 and extends out of the fixed frame 110; the bearing 133 is fixedly installed in a through hole provided on the bottom of the fixed frame 110; thereby, the rotor 131 can rotate the power output shaft 132 in the bearing 133, thereby outputting the power torque to the external transmission mechanism.

As shown in fig. 4 (a), the rotor 131 includes a mounting hub 1311 and a plurality of wedge-shaped permanent magnets 1312; the mounting hub 1311 is centrally provided with a hub through-hole 1313 for fixing the power output shaft 132, and the plurality of wedge-shaped permanent magnets 1312 are fixed to the outer side wall of the mounting hub 1311 uniformly in the circumferential direction of the mounting hub 1311 and at the same level.

Fig. 4 (b) shows a schematic view of the assembly of a single wedge-shaped permanent magnet 1312 and a mounting hub 1311, wherein the wedge-shaped permanent magnet 1312 is fixedly mounted on the outer side wall of the mounting hub 1311 at a certain inclination angle (i.e. the angle between the force bearing surface of the wedge-shaped permanent magnet and the horizontal plane) α. In this case, the wedge-shaped permanent magnet 1312 and the mounting hub 1311 may be connected by various means, such as riveting or the like.

It should be appreciated that in the assembled state, all of the wedge-shaped permanent magnets 1312, in proximity to the poles of the stator assembly 120, should have the same polarity, i.e., either both N poles or both S poles, as the permanent magnet stator 122, in proximity to the rotor assembly 130. As shown in fig. 5, according to the principle that like poles of the magnets repel each other, when the magnets are close to each other, the wedge-shaped permanent magnet will receive a repulsive force F acting vertically downward on the force-bearing surface (i.e., the surface a in fig. 4 (b)). According to the relevant law of Newton's classical mechanics, the repulsive force F is decomposed into a transverse traction force F1 and a radial shear force F2; the radial shear force F2 is counteracted by the internal stress of the wedge-shaped permanent magnet, and the transverse traction force F1 drives the wedge-shaped permanent magnet 1312 to rotate. In general terms, this principle is exactly the same as that of a wind-driven windmill. Similarly, all the wedge-shaped permanent magnets 1312 are driven by the transverse traction force F1, so that the mounting hub 1311 and the power output shaft 132 are driven to rotate, and power output is realized; when the two are far away from each other, the repulsive force between the two gradually decreases until disappears, the wedge-shaped permanent magnet 1312 gradually stops rotating, and the power output gradually decreases until zero.

In order to ensure excellent power output, the installation inclination angle α of the wedge permanent magnet 1312 (as shown in fig. 4 (b)) is preferably 40 ° to 45 °; most preferably, the angle of inclination α is 45 ° to produce maximum transverse traction force F1 and minimum radial shear force F2.

With respect to the installation number of the wedge-shaped permanent magnets 1312, experiments prove that when the design size of the rotor assembly is fixed, the larger the number of the wedge-shaped permanent magnets is, the larger the repulsive force borne by the permanent magnet stator is when the permanent magnet stator is close to the wedge-shaped permanent magnet stator is, and thus the higher the output power is; on the other hand, when viewed axially, it is preferable that the plurality of wedge-shaped permanent magnets 1312 be maximally prevented from overlapping, so that the magnetic fields of the wedge-shaped permanent magnets are effectively prevented from interfering with each other, thereby preventing the waste of torque. Therefore, when a plurality of wedge-shaped permanent magnets 1312 are assembled, the number thereof preferably takes both of the above aspects into consideration.

Referring back to fig. 1 and 2, the rotor assembly 130 may further include a pulley 136 disposed at one end of the power take-off shaft 132 and distal from the stator assembly 120.

Alternatively, a plurality of mounting bolts 111 are provided on the side wall, the top or the bottom of the fixing frame 110, and the permanent magnet motor can be securely mounted to the corresponding mechanical equipment by the mounting bolts 111.

In order to reduce the magnetic interference of the permanent magnet caused by external parts, the rest parts except the permanent magnet stator 122, the wedge-shaped permanent magnet 1312 and the spring 124 are non-magnetic materials. Specifically, the traction connection member 126, the traction rod 121, the traction guide rail 125, the bolt 140, the stator mounting plate 123, the fixed frame 110, the rotor assembly support plate 135, the mounting bolt 111, the bearing 133, the power output shaft 132 and the pulley 136 are all made of high-strength aluminum alloy materials; the upper sealing plate 1341, the circumferential reinforcement ring 1342, the lower sealing ring 1343 and the mounting hub 1311 are all carbon fiber materials.

In a preferred embodiment, the permanent magnets used in the permanent magnet engine (including the stator and rotor) are all neodymium magnets. Because the neodymium magnet is the strongest magnetic substance discovered at present, and the magnetic flux of the neodymium magnet is 10-30 times that of a common magnet, the neodymium magnet can generate great magnetic repulsion force, and great power is output.

And (3) maintaining and maintaining the neodymium magnet engine:

it is known that permanent magnets exhibit slow demagnetization during use, particularly during sustained high torque output. Therefore, when the output torque of the engine is lower than the lower limit of the design value, the stator magnet can be directly magnetized by oiling with a large-flux magnetizing device, and the rotor magnet group can be magnetized by oiling with the rotor magnet group by detaching the protective cover of the rotor magnet group. This maintenance is usually done within 20 minutes using specially manufactured equipment. In addition, the interval of the magnetizing and the refueling is also far larger than the interval of the internal combustion engine refueling and the solid-state battery charging. Thus, in combination, the engine still has significant advantages over conventional internal combustion engines and new solid-state battery power.

As shown in fig. 6, it is a schematic flow chart of a control method of a permanent magnet motor according to the present invention. As shown in the figure, the control method comprises:

s210, pulling the pulling rod 121 to move the permanent magnet stator 122 toward the rotor assembly 130 along the axial direction, so that the permanent magnet stator 122 and the rotor 131 gradually approach each other, and the repulsive force generated by the repulsion of like poles drives the wedge-shaped permanent magnet 1312 to drive the mounting hub 1311 and the power output shaft 132 to rotate around the rotation axis;

s220, pulling the pulling rod 121 to move the permanent magnet stator 122 away from the rotor assembly 130 in the axial direction, so that the permanent magnet stator 122 and the rotor 131 gradually move away from each other, and the mounting hub 1311 and the power take-off shaft 132 gradually stop rotating due to the gradually decreasing repulsive force therebetween.

The process of the control method has already been described in detail in the above description of the structure of the engine, and is not described again here.

According to the permanent magnet engine and the control method thereof, the mechanical structure is driven to operate by utilizing the magnetic force of the permanent magnet, so that the permanent magnet engine has the advantages of being high in efficiency, free of pollution, low in noise, simple in processing and manufacturing, convenient and fast to maintain and repair, wide in use scene and the like.

In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only used for the sake of convenience in describing the structure and control method of the present invention, but do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit of the present invention as defined by the appended claims. It should be understood that the utility model man can integrate the features described in the different dependent claims and in this case in a different way than what was described in the original claim; it is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.

In particular, it should be understood that the above description is only an example of the present invention and is not intended to limit the other embodiments of the present invention; any modification, equivalent replacement, improvement and the like made by the utility model should be included in the protection scope of the utility model within the design concept and principle of the utility model.

Claims

1. A permanent magnet engine, comprising:

a fixed frame;

a stator assembly, comprising:

a permanent magnet stator having a disk shape and located inside the fixed frame;

one end of the traction rod is fixedly connected with the permanent magnet stator, and the other end of the traction rod extends out of the fixed frame so as to draw the permanent magnet stator to move along the axial direction of the traction rod under the action of external force;

a rotor assembly, comprising:

the rotor is positioned in the fixed frame, is parallel to and right opposite to the permanent magnet stator and comprises a mounting hub and a plurality of wedge-shaped permanent magnets, the wedge-shaped permanent magnets are fixedly mounted around the mounting hub at the same inclination angle relative to the horizontal plane, and the wedge-shaped permanent magnets and the permanent magnet stator are homopolarly opposite, so that repulsion generated when the wedge-shaped permanent magnets and the permanent magnet stator approach each other is exerted on the wedge-shaped permanent magnets, and the wedge-shaped permanent magnets drive the mounting hub to rotate;

and one end of the power output shaft is fixedly connected with the mounting hub, and the other end of the power output shaft extends out of the fixed frame and is supported by a bearing fixed on the fixed frame.

2. The permanent magnet engine according to claim 1, wherein the rotor assembly further comprises a sealing cover for sealing the rotor, the sealing cover comprises a circumferential reinforcing ring, an upper sealing plate arranged at the top of the circumferential reinforcing ring and a lower sealing plate arranged at the bottom of the circumferential reinforcing ring, one end of the wedge-shaped permanent magnet, which is far away from the mounting hub, is fixedly connected with the inner side wall of the circumferential reinforcing ring, and the power output shaft penetrates through the lower sealing plate and seals a gap.

3. The permanent magnet engine of claim 2, wherein the rotor assembly further comprises a rotor assembly support plate fixed to the power output shaft and fixedly mounted to a bottom of the lower sealing plate to support the sealing cover.

4. The permanent magnet engine of claim 1, wherein the stator assembly further comprises a spring disposed about the drawbar and positioned between the permanent magnet stator and the inner side of the stationary frame.

5. The permanent magnet engine according to claim 1, wherein the installation inclination angle of the wedge-shaped permanent magnet is 40 ° to 45 °.

6. A permanent magnet engine according to claim 1, wherein a through hole is provided in the fixed frame for the passage of the drawbar, a draw tube being provided in the through hole, the drawbar moving along the draw tube within the through hole.

7. The permanent magnet engine of claim 1, wherein a drag ring is provided at an end of the drawbar outside the fixed frame.

8. A permanent magnet engine according to any of claims 1 to 7, characterized in that the stator assembly further comprises a stator mounting plate, opposite sides of which are fixedly connected with the permanent magnet stator and the drawbar, respectively.

9. A permanent magnet engine according to claim 2 or 3, characterized in that the permanent magnets are neodymium magnets, the drawbar, the fixed frame, the bearing, the power take-off shaft are made of an aluminium alloy material, and the sealing boot and the mounting hub are made of a carbon fibre material.