WO2013152711A1

WO2013152711A1 - Magnetic equal-torque generator

Info

Publication number: WO2013152711A1
Application number: PCT/CN2013/073938
Authority: WO
Inventors: 刘刚; 刘姿仪
Original assignee: Liu Gang; Liu Ziyi
Priority date: 2012-04-09
Filing date: 2013-04-09
Publication date: 2013-10-17

Abstract

The invention provides a magnetic equal-torque generator, comprising a stator, a rotor, magnetic necks, magnetic boots and a casing. Each winding on the stator consists of two coil groups connected in series. Each winding is fixed around a magnetic neck. The magnetic neck is fixedly connected to the magnetic boot as a whole. Each coil group consists of A coil and B coil. A coil is connected to a capacitor in series, and B coil is for output. While the generator is working, the rotor rotates. In the process of that the magnet is moving close to, completely corresponding to , and away from the corresponding winding and the magnetic boot, the magnetic effects of magnets on the rotor and stator windings are peer-to-peer and symmetry, the magnetic force results are mostly offset, the rotor resistance torque of rotation is smaller, the required driving torque for the rotor rotating decreases, and the series capacitor increases the excitation effect of generator, thus realizing that the generator output power with high efficiency. The invention provides a simple structure, high energy conversion efficiency, and can be widely used in power generation equipments such as power plant.

Description

Magnetic equipotential generator

Technical field

The invention relates to the field of electromechanical, and in particular to a magnetic equipotential generator. Background technique

At present, the well-known generators are mostly excited by the rotor, and the stator windings are induced by the magnetic force to generate current. In the process of obtaining electric energy, the rotation of the rotor overcomes the repulsion and attraction of the coil current magnetic field, and generates electricity. Machine power conversion energy efficiency is low. Therefore, reducing the resistance in the rotational motion of the rotor is a way to solve the existing power generation technology and improve the efficiency of the generator. Summary of the invention

The invention provides a magnetic equipotential generator, which is capable of counteracting the resistance generated by the induced current magnetic field of the stator winding by the magnetic force of the rotary motion of the rotor, solving the problem of low efficiency of the existing generator, and realizing the high efficiency output of the generator. Electrical energy.

The invention provides a magnetic equipotential generator, comprising a stator, a rotor, a magnetic guiding neck, a magnetic guiding shoe and a casing, wherein: each winding on the stator is composed of two coil groups connected in series, and each winding fixing sleeve On the magnetic guiding neck, one end of the magnetic guiding neck is fixed to the magnetic guiding shoe, and the other end is fixed on the casing, and the arc length of the magnetically conductive surface corresponds to the central angle b, and the arc between two adjacent magnetically guided leathers The center angle a corresponding to the length, the N pole and the S pole of the magnet fixed on the rotor are correspondingly arranged with the winding magnetic guide shoe, and the distance between the magnet and the same magnetic pole and between the N pole and the S pole is greater than 0 mm, and the magnet The arc length of the pole face corresponds to the central angle c, and the arc length between adjacent magnetic poles corresponds to the central angle d, and the area of the magnetic pole surface of the magnet and the surface of the magnetic guiding shoe are not equal.

The magnetic equipotential generator as described above, preferably, the stator includes at least one winding, and the coil group in each winding includes an A coil and a B coil, and the A coil and the B coil have at least one turn or more;

The wire diameter and the number of turns of the A coil and the B coil are equal or unequal. The head wire of the A coil in each winding is connected with the tail wire, and the head wire of the B coil in each winding is connected with the tail wire, and the A coil is connected in series with greater than 0. The capacitance of the micro method, the B coil is externally output.

a magnetic equipotential generator as described above, preferably, the magnetic guiding neck, the magnetic guiding shoe and each winding The two coil sets on the group are symmetrically equidistantly distributed in the radial direction of the stator, and are symmetrically equidistantly distributed in the axial direction.

The generator as described above, preferably, the magnet is a permanent magnet or an electromagnet.

In the magnetic equipotential generator as described above, preferably, the area of the magnetic pole face of the magnet on the rotor and the surface of the magnetic guiding shoe are not equal, the arc length of the guiding shoe face corresponds to the degree of the central angle b and the relationship between the adjacent magnetic shoes The arc length corresponding to the central angle a is greater than zero degrees less than or equal to 90 degrees, the magnetic pole surface arc length to the central angle c is greater than zero degrees less than 180 degrees, and the arc length between the magnetic pole and the magnetic pole corresponds to the central angle d is less than or Equal to 90 degrees.

In the magnetic equipotential generator as described above, preferably, the magnetic neck and the magnetic boot are composed of a sheet-like or layered magnetically permeable material.

Preferably, the layered magnetically permeable material is a ferrosilicon piece having a thickness greater than 0.001 mm.

The magnetic equi-equal generator of the invention has two sets of coil sets connected in series on each winding of the stator, each winding is sleeved on the magnetic guiding neck, and the magnetic guiding neck is fixedly connected with the magnetic guiding shoes, and each coil group has an A coil, B coil, A coil has capacitor in series, B coil is externally output, generator works, rotor rotates, magnetic force generated by magnet and stator winding on the rotor during the movement of the magnet close to, completely corresponding to, away from the corresponding winding and the magnetic guide shoe The effect is equi-symmetric, the magnetic force results mostly cancel out, the resistance torque of the rotor rotation is small, the torque required to drive the rotor is reduced accordingly, and the series capacitor increases the excitation, which realizes the high-efficiency output of the generator. The invention has the advantages of simple structure, high energy conversion efficiency, and can be widely used in power generation equipment such as power plants. DRAWINGS

1 is a schematic structural view of a magnetic equipotential generator provided by the present invention;

Figure 2 is a cross-sectional view taken along line C-C of Figure 1;

3 is a schematic structural view of another magnetic equipotential generator provided by the present invention;

Figure 4 is a cross-sectional view taken along line DD of Figure 3. DETAILED DESCRIPTION OF THE EMBODIMENTS The objects, the technical solutions, and the advantages of the embodiments of the present invention will be more clearly described in the following description of the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative efforts are within the scope of the present invention.

1 is a schematic structural view of a magnetic equipotential generator provided by the present invention, and FIG. 2 is a cross-sectional view taken along line C-C of FIG. 1. As shown in FIG. 1 and FIG. 2, the magnetic isometric generator provided in this embodiment includes a rotor 5, a stator 11, a casing 13, an end cover 9, a bearing 8, a transmission shaft 6, a transmission wheel 10, and a fan 7, the above components. The structure and the connection relationship are basically the same as those of the existing generator structure. In this embodiment, the magnetic isometric generator is mainly characterized in that: the stator 11 of the generator has three windings 2, and each winding 2 has two The coil groups are composed in series, each coil group includes an A coil and a B coil, and the A coil and the A coil in each winding 2 are connected in series with the tail line, and the B coil and the B coil head line in each winding 2 Connected in series with the tail wire, the wire diameter of the A coil and the B coil are not equal, the A coil is connected in series with a capacitance greater than 0 microfarad, the B coil is externally output, and the winding 2 is fixedly sleeved on the magnetic neck 1, one end of the magnetic neck 1 The magnetic guiding shoe 3 is fixed, and the other end is fixed on the casing 13. The magnetic guiding neck 1, the magnetic guiding shoe 3 and the six coil sets are symmetrically equidistantly distributed in the radial direction, and the rotor 5 is provided with twelve identical shapes. The magnet 4 is symmetrically arranged in the radial direction of the rotor 5, And equidistantly disposed in the axial direction of the rotor 5, the arc length of the magnetic guide shoe surface 3 on the stator 1 is 30 degrees to the central angle, and the central angle corresponding to the arc length between the adjacent magnetically conductive leathers 3 is 30 degrees. The pole length of the permanent magnet 4 on the rotor 5 is 15 degrees to the central angle, the arc length between the magnetic pole and the magnetic pole is 15 degrees to the central angle, and the magnetic neck 1 and the magnetic guide 3 are composed of silicon iron sheets. Its thickness is 0.35 mm.

Specifically, the central angle b corresponding to the arc length of the guide shoe on the stator 1 , the central angle a corresponding to the arc length between two adjacent magnetic shoes, and the arc length of the magnet on the rotor 5 The corresponding circular angle c is the central angle d corresponding to the arc length between adjacent magnetic poles.

When a is equal to b, there are two coil groups on the stator 1 1 , and the magnetic pole faces of the two magnets 4 on the rotor 5 correspond to the faces of the two magnetic shoes 3, c is larger than d and greater than 0, and the magnetic pole face of the magnet 4 is doubled. The magnetic pole faces of the four magnets 4 on the magnetic shoe upper surface 3 or the rotor 5 correspond to the two magnetic conductive shoes 3 faces, c is equal to d, and the magnetic pole faces of the magnets 4 are equal to one-half of the magnetic conductive shoes 3 faces;

There are two or more coil sets on the stator 1 1 , and the magnetic pole faces of the four or more magnets 4 on the rotor 5 are opposite to the faces of the two magnetic guide shoes; c is equal to d, and the magnetic pole face of the magnet 4 is equal to one-half of the magnetic guide shoes. 3 faces.

When the generator is in operation, the rotor 5 rotates counterclockwise from 0 degrees to 15 degrees, and the N pole of the permanent magnet 4 on the rotor 5 moves in the completely corresponding magnetic boot 3, as shown in FIG. The repulsion interaction between the pole and the coil group to generate the N magnetic magnetic field is opposite in opposite directions, and its force base This is close to 0; at the same time, the magnetic poles 3 and the coil set which are completely corresponding to the N-pole induction generate the S poles on both sides of the attractive magnetic field of the N magnetic field, and the magnetic force is mostly offset due to the symmetry of the attraction force and the opposite direction. At the same time, the S pole movement of the permanent magnet 4 is between the magnetic shoes 3, and the N pole of the permanent magnet 4 induces an N magnetic magnetic field to the coil group to simultaneously attract the S pole on both sides of the S pole, due to the symmetry of the attraction, the direction Instead, its magnetic force is mostly offset.

The rotor 5 continues to rotate counterclockwise to a position of 30 degrees, and the S pole of the permanent magnet 4 is in close proximity to the movement of the magnetic boot 3, and the S pole is subjected to the magnetic shoe 3 and the coil which will correspond completely. The group has a counterclockwise attraction with a magnitude of 0, and at the same time, the N pole moves away from the originally corresponding magnetic guiding shoe 3, and since the S pole gradually corresponds to the magnetic guiding shoe 3 and the coil group, the S magnetic magnetic field generated by the current is generated. For the N pole, a clockwise attraction with a magnitude of 0 is generated. The S pole and the N pole are simultaneously subjected to a force, a counterclockwise direction and a clockwise direction, and the magnetic force is mostly eliminated by 4 degrees.

The rotor 5 continues to rotate counterclockwise to a position of 45 degrees, the S pole movement of the permanent magnet 4 on the rotor 5 is in the corresponding corresponding magnetization 3, and the S pole and the coil group generate a repulsive force of the S magnetic field to interact in opposite directions. The force is basically close to 0; at the same time, the magnetic poles 3 and the coil set corresponding to the S pole induction generate the N poles on both sides of the attractive magnetic field of the S magnetic field, and the magnetic force is mostly due to the symmetry of the attraction force and the opposite direction. At the same time, the N pole of the permanent magnet 4 moves between the magnetic shoes, and the S pole of the permanent magnet 4 induces an S magnetic magnetic field to attract the N pole on both sides of the N pole, and the symmetry is equal due to the attraction. In the opposite direction, most of its magnetic force is offset.

The rotor 5 continues to rotate counterclockwise to a position of 60 degrees, and the N pole of the permanent magnet 4 is close to the magnetic boot

When the 3 to N poles completely correspond to the movement of the magnetic boot 3, the N pole is subjected to a counterclockwise attraction of the magnetic guide shoe and the coil group which is completely corresponding to 0, and the S pole movement is completely away from the original. The magnetic guiding shoe 3, since the N pole gradually corresponds completely to the magnetic guiding shoe 3, the N magnetic magnetic field generated by the winding current generates a clockwise attraction force to the S pole which is as large as 0, and the S pole and the N pole are simultaneously subjected to the force. , a counterclockwise direction, a clockwise direction, the result of its magnetic action is mostly eliminated.

Thus, the rotor 5 continues to rotate to 120 degrees, 240 degrees, and 360 degrees, and the permanent magnet 4 on the rotor 5 repeats the above motion, and the magnetic resistance of the permanent magnet 4 on the rotor 5 is small, and the resistance of the rotor 5 is reversed. It is also small, and the mechanical efficiency is high during the rotation of the rotor 5, and then the generator outputs electric energy with high efficiency. In the magnetic equi-equal generator provided in this embodiment, each winding of the stator has two sets of coil sets connected in series, each winding is sleeved on the magnetic guiding neck, and the magnetic guiding neck is fixed to the magnetic guiding shoe as an integral body, and each coil set has

A coil, B coil, A coil has capacitor in series, B coil is externally output, generator works, rotor rotates, magnet moves close to, completely corresponds to, moves away from the corresponding winding and magnetic shoe, magnet and stator winding on rotor The generated magnetic force is equivalent to the symmetry, the magnetic force effect is mostly offset, the resistance torque of the rotor rotation is small, the torque required to drive the rotor is reduced accordingly, and the series capacitor increases the excitation effect, achieving high generator efficiency. The ground output electrical energy, the invention has simple structure, high conversion energy efficiency, and can be widely used in power generation equipment such as power plants.

FIG. 3 is a schematic structural view of another magnetic equipotential generator provided by the present invention. Figure 4 is a cross-sectional view taken along line D-D of Figure 3. As shown in FIG. 3 and FIG. 4, the structure of the generator is basically the same as that of the generator shown in FIG. 1 and FIG. 2, and the generator includes a rotor 5, a stator 11, a casing 13, an end cover 9, and a bearing. 8. The transmission shaft 6, the transmission wheel 10 and the fan 7, the stator 11 is provided with two left and right windings 2 arranged along the axial direction of the rotor 5, each set has three windings 2, and each winding 2 has two coil groups connected in series, Each coil group includes an A coil and a B coil, and the A coil and the A coil head line and the tail wire in each winding 2 are connected in series, and the B coil in each winding 2 and the head coil and the tail line of the B coil are connected in series, The wire diameters of the A coil and the B coil are not equal, the turns are not equal, the A coil is connected in series with a capacitance greater than 0 microfarad, the B coil is externally output, the winding 2 is fixedly sleeved on the magnetic neck 1, and the magnetic neck 1 is fixed at one end. The magnetic guiding shoe 3 is fixed on the casing 13 at the other end, and the magnetic guiding neck 1, the magnetic guiding shoe 3 and the two coil sets are symmetrically equidistantly distributed in the radial direction, and the magnetic arc of the magnetic conductive shoe 3 on the stator 11 is opposite to the center of the circle The angle is 50 degrees, and the distance between the adjacent magnetic shoes 3 is equal to 10 The rotor 5 has six permanent magnets 4 of the same shape, which are symmetrically symmetric and equidistantly distributed in the radial direction. The arc length of the permanent magnet 4 is 50 degrees from the central angle, and the distance between the magnetic pole and the magnetic pole is the arc length to the center of the circle. The angle is equal to 10 degrees, and the magnetic neck 1 and the magnetic boot 3 are composed of a ferrosilicon sheet having a thickness of 0.35 mm.

In this embodiment, the winding arrangement on the stator 11 of the generator and the arrangement of the permanent magnets 4 on the rotor 5 are arranged in the axial direction differently from the generators shown in FIG. 1 and FIG. 2, in the axial direction. The upper stator 11 (winding) has two sets, and the two sets of stators 11 (windings) are separated by a yoke so that the two sets of stators 11 (windings) are separated by 50 mm, and the yoke and the two sets of stators 11 (windings) are yoke Fixed contact, one set of stator 11 at one end has three windings 2 corresponding to the N pole on the rotor 5, and the other set of stator 11 has three windings 2 corresponding to the S pole on the rotor 5, and the distance between the adjacent magnetic conductive shoes 3 is the arc length The central angle is equal to 10 degrees; there are two sets of magnetic poles on the rotor 5, and a total of six permanent magnets 4 of the same shape, The two sets of magnetic poles are fixed on the rotating shaft 6 by a magnetic conductive material, and one set of one end has three permanent magnets 4, the magnetic poles corresponding to the magnetic surface of the magnetic guiding shoe 3 are N poles, and the other end of the set has three permanent magnets 4, corresponding guides The magnetic surface of the magnetic shoe 3 is extremely S pole, and the two sets of magnetic poles are separated by 50 mm. When viewed from the axial direction, the N pole and the S pole are not at the same angle, and the angle is less than 10 degrees.

4 is a cross-sectional view taken along line DD of FIG. 3, and FIG. 4 is a schematic view showing a cross section along the left end of the generator, and the schematic diagram of the right end of the generator is not shown, and the stator 11 has the same structure as the left end. Only the permanent magnet 4 on the rotor 5 corresponds to the magnetic pole S pole of the magnetic conductive shoe 3 on the stator 11. The layout and shape volume of the permanent magnet 4 are the same as the right end, and it is not necessary to draw a schematic diagram.

As shown in FIG. 4, during the operation of the generator, during the rotation of the rotor 5 from 0 degrees to nearly 60 degrees counterclockwise, the N pole of the permanent magnet 4 on the left end of the rotor 5 moves away from the original corresponding magnetic guide shoe. 3 and the coil set, the proximity will completely correspond to the magnetic guide 3 and the coil set of the right end S pole of the rotor 5; at the same time, the right end S pole moves away from the original corresponding corresponding magnetic boot 3 and the coil set, and the proximity will completely correspond The magnetic pole 3 and the coil group which originally correspond to the N pole of the permanent magnet 4 at the left end of the rotor 5, the N pole S pole is excited in the magnetic field of the magnetic flux guiding shoe 3 and the coil group, and the magnetic field is mostly canceled, then, N The magnetic force received by the pole S pole is also mostly canceled; when the rotor 5 rotates counterclockwise to 60 degrees, the N pole S pole completely corresponds to the magnetic boot 3 and the coil set, and the N pole S pole pairs the magnetic boot 3 and the coil set The magnetic field is the largest, and the coil group is magnetically coupled. At this time, the magnetic reel 3 and the coil group have the largest repulsive force on the N pole S pole. Since the N pole S pole completely corresponds to the magnetic boot 3 and the coil group, the repulsive force is symmetrically equal. In the opposite direction, Was offset by the result is zero.

Specifically, the center angle b corresponding to the arc length of the three sides of the magnetism on the stator 1 is a central angle a corresponding to the arc length between two adjacent magnetic shoes 3, on the rotor 5 The circular angle c corresponding to the arc length of the pole face of the magnet 4 and the central angle d corresponding to the arc length between adjacent magnetic poles.

When b is greater than a, a is greater than or equal to 0, there are at least four coil groups on the stator 1 1 , and the magnetic pole faces of at least four magnets 4 on the rotor correspond to at least four magnetically conductive surfaces.

The windings 2 on the stator 11 are arranged along the axial direction of the rotor 5 with two sets of left and right sides. The two sets of windings are separated by a yoke so that the two sets of windings are separated by more than 0 mm, and two coil sets are arranged in series in each set, or Two coil sets are connected in series between the two sets of windings 2,

One set of stators 11 at one end has at least two coil sets corresponding to the N poles of at least two magnets 4 on the rotor, and the other set of stators 11 has at least two coil sets corresponding to the rotor 5 S poles of at least two magnets 4, c equal to d equal to b plus y, y equal to 0 degrees or greater than 0 degrees less than 20 degrees, two sets of magnets 4 on the rotor 5, N poles of at least two magnets 4 and at least two The S poles of the magnets are separated by more than 0 mm, and the two sets of magnets 4 on the rotor 5 are fixed on the rotating shaft 6 by a magnetically permeable material. The N pole of the magnet 4 is not in the same direction as the S pole of the magnet 4 in the axial direction. Staggered placement within the angle.

The rotor 5 continues to rotate counterclockwise to 120 degrees, 240 degrees, and 360 degrees, and the permanent magnet 4 on the rotor 5 repeats the above motion, the magnetic resistance of the permanent magnet 4 on the rotor 5 is small, and the resistance of the rotor 5 is resisted. It is also small, and the mechanical efficiency is high during the rotation of the rotor 5, and then the generator outputs electric energy with high efficiency.

The technical effect of the magnetic isotonic generator provided in this embodiment is the same as that of the technical solution of the above embodiment, and details are not described herein again.

The series connection and parallel connection circuit diagrams between the above two kinds of magnetic equi-equal generator windings 2 are not shown, and can be connected according to actual needs, which can be easily realized by those skilled in the art, so that it is not necessary to draw a re-marking.

It should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

Claim

1. A magnetic equipotential generator comprising a stator, a rotor, a magnetic guide neck, a magnetic guide shoe and a casing, wherein: each winding on the stator is composed of two coil sets connected in series, each winding being fixedly sleeved On the magnetic guiding neck, one end of the magnetic guiding neck is fixed to the magnetic guiding shoe, and the other end is fixed on the casing, and the arc length of the magnetic guiding shoe surface corresponds to the central angle b, and the center of the arc corresponding to the two adjacent guiding magnetizations Angle a, the N pole and the S pole of the magnet fixed on the rotor are arranged corresponding to the winding magnetic guide shoe, and the distance between the magnet and the same magnetic pole and between the N pole and the S pole is greater than 0 mm, and the magnet pole surface arc length Corresponding to the central angle c, the arc length between adjacent magnetic poles corresponds to the central angle d, and the areas of the magnetic pole faces of the magnet and the magnetically permeable faces are not equal.

2. The magnetic isometric generator according to claim 1, wherein: said stator comprises at least one winding, wherein each winding comprises a coil of A and a coil of B, and said coil of A and B have at least one or more turns. ;

3. The magnetic isometric generator according to claim 1, wherein: said magnetic neck, said magnetic shoe and two coil sets on each winding are symmetrically equidistantly distributed in said stator radial direction, and Parallel symmetrically equidistant distribution in the axial direction.

The magnetic equipotential generator according to claim 1, wherein the magnet is a permanent magnet or an electromagnet.

The magnetic equipotential generator according to claim 1, wherein: the area of the magnetic pole surface of the magnet and the surface of the magnetic guiding shoe are not equal, and the arc length of the guiding shoe surface corresponds to the degree and phase of the central angle b The arc length between the adjacent magnetic shoes corresponding to the central angle a is greater than zero degrees less than or equal to 90 degrees, the degree of the magnetic pole surface arc length to the central angle c is greater than zero degrees less than 180 degrees, and the arc length between the magnetic pole and the magnetic pole corresponds to the center of the circle The angle d is less than or equal to 90 degrees.

6. A magnetic isometric generator according to claim 1, wherein: said magnetic neck and said magnetic boot are comprised of a sheet or layer of magnetically permeable material.

The magnetic isometric generator according to claim 6, wherein the layered magnetic material is a ferrosilicon piece, and the silicon iron piece has a thickness of more than 0.001 mm.

8. A magnetic isometric generator according to claim 1 wherein: when a is equal to b, There are two coil sets on the stator. The magnetic pole faces of the two magnets on the rotor correspond to two magnetic guide faces, C is greater than d greater than 0, the magnetic pole face of the magnet is twice the magnetic guide face, or there are four on the rotor. The magnetic pole face of the magnet corresponds to two magnetic guide faces, c is equal to d, the magnetic pole face of the magnet is equal to one-half of the magnetic guide shoe face; there are more than two coil sets on the stator, and the magnetic poles of the magnet have more than four magnets The surface is opposite to two or more magnetic guiding shoes; c is equal to d, and the magnetic pole surface of the magnet is equal to one-half of the magnetic guiding surface.

9. The magnetic isometric generator according to claim 1, wherein: when b is greater than a, a is greater than or equal to 0, there are at least four coil groups on the stator, and magnetic poles of at least four magnets on the rotor face Should have at least four magnetically conductive surfaces,

The windings on the stator are arranged along the axial direction of the rotor with two sets of left and right. The two sets of windings are separated by a yoke so that the two sets of windings are separated by more than 0 mm, and each set has two coil sets connected in series, or two sets of windings. There are two coil sets connected in series,

A set of stators at one end has at least two coil sets corresponding to the N poles of at least two magnets on the rotor, and a set of stators on the other end has at least two coil sets corresponding to the S poles of at least two magnets on the rotor. , c is equal to d equal to b plus y, y is equal to 0 degrees or greater than 0 degrees is less than 20 degrees, two sets of magnets on the rotor, the N poles of at least two magnets and the S poles of at least two magnets are more than 0 mm apart The two sets of magnets on the rotor are fixed on the rotating shaft by the magnetic conductive material, and the N pole of the magnet is staggered from the S pole of the magnet at the same angle from the axial direction.