CN115589080A

CN115589080A - Generator and rotor structure thereof

Info

Publication number: CN115589080A
Application number: CN202110863266.9A
Authority: CN
Inventors: 李天德
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-05
Filing date: 2021-07-29
Publication date: 2023-01-10
Also published as: TWI815142B; TW202304106A

Abstract

The invention relates to a generator and a rotor structure thereof. The generator comprises a rotor structure and a stator structure. The rotor structure comprises an annular track, a rotating shaft structure and a magnetic part. The rotating shaft structure is arranged in the annular track and used for driving the annular track to rotate. The magnetic part is arranged on the annular track. The stator structure comprises a coil, and the stator structure is arranged at the periphery or inside of the rotor structure.

Description

Generator and rotor structure thereof

Technical Field

The present invention relates to a generator and a rotor structure, and more particularly, to a generator and a rotor structure having a plurality of magnetic members.

Background

The structure and principle of a Generator (Generator) commonly used today are generally composed of a stator, a rotor, an end cover, a bearing, and other parts; the stator consists of a stator core, a magnetic induction coil, a machine base and other structural members for fixing the parts; the rotor is composed of rotor magnetic pole, yoke, protective ring, central ring, slip ring, fan and rotary shaft. The stator and the rotor of the generator are connected and assembled by the bearing and the end cover, so that the rotor can rotate in the stator and do magnetic field cutting (magnetic line cutting) movement, thereby generating induction potential, the induction potential is led out through the wiring terminal and connected in a loop, and certain voltage and current are generated.

However, in the conventional generator, when the rotor is generally in a fixed shape, such as a circular shape, the number of magnets that can be disposed thereon is limited, so that the number of cuts that can be performed when the rotor rotates is limited, and the torque thereof is limited, and cannot be further increased. As the demand for electricity increases, the torque of existing generators may not meet the demand.

Therefore, a generator and rotor structure is needed to solve the above problems.

Disclosure of Invention

The invention provides a generator, which comprises a rotor structure and a stator structure. The rotor structure includes a circular track, a rotating shaft structure and a plurality of magnetic members. The rotating shaft structure is arranged in the annular track and used for driving the annular track to rotate, and the magnetic part is arranged on the annular track. The stator structure comprises a coil, and the stator structure is arranged at the periphery or inside of the rotor structure. By the arrangement of the annular track, more magnetic pieces can be placed on the rotor structure.

In one embodiment, the magnetic members are displaceable with rotation of the circular track and generate a magnetic field with the coil to cut. Thus, the generator can generate electricity.

In one embodiment, to achieve magnetic field cutting, the winding direction of the coil is different from the arrangement direction of the magnetic members.

In one embodiment, the annular track may be non-circular in shape. In one embodiment, the annular track may have an extension portion and a bent portion, wherein the area of the extension portion may be larger than the area of the bent portion. Therefore, the extension part of the circular track can be provided with more magnetic pieces, and the magnetic pieces can generate more cuts with the coil when the circular track rotates. In addition, the extension part can be scaled according to requirements, so that the invention can be provided with expandability.

In one embodiment, the endless track may include magnetic member carriers disposed on the conveyor belt, and each magnetic member carrier is used for holding a magnetic member. Further, two ends of the magnetic carrier can respectively comprise a bearing. Furthermore, the rotor structure may include two side plates disposed at two sides of the circular track, and one end of the magnetic carrier is adjacent to the inner walls of the side plates.

In one embodiment, the endless track includes a conveyor belt, and the conveyor belt may be a chain or a belt.

The invention also provides a rotor structure for use in a generator, wherein the generator comprises a stator structure having coils. The rotor structure includes a circular track, a rotating shaft structure and a plurality of magnetic members. The rotating shaft structure is arranged in the annular track and used for driving the annular track to rotate, and the magnetic part is arranged on the annular track. Wherein the stator structure may be arranged at the periphery or inside the rotor structure.

In one embodiment, the magnetic members of the rotor structure can be displaced along with the rotation of the circular track and generate magnetic field cutting with the coil.

In one embodiment, the magnetic members of the rotor structure are arranged in a direction different from a winding direction of the coils.

In an embodiment, the shape of the annular track of the rotor structure may be non-circular. In one embodiment, the annular track of the rotor structure may have an extension portion and a bent portion, wherein the area of the extension portion may be larger than the area of the bent portion.

In one embodiment, the circular track of the rotor structure may include magnetic member carriers disposed on the conveyor belt, and each magnetic member carrier is used for holding a magnetic member. Further, two ends of the magnetic carrier can respectively comprise a bearing. Furthermore, the rotor structure may include two side plates disposed at two sides of the circular track, and one end of the magnetic carrier is adjacent to the inner walls of the side plates.

In one embodiment, the endless track of the rotor structure includes a conveyor belt, and the conveyor belt may be a chain or a belt. Other novel features of the invention will become apparent from the following detailed description of the invention when considered in conjunction with the drawings.

Drawings

Fig. 1 (a) is a schematic diagram of a generator according to an embodiment of the present invention.

Fig. 1 (B) is an exploded view of a generator according to an embodiment of the present invention.

Fig. 2 (a) is an exploded view of a rotor structure according to an embodiment of the present invention.

FIG. 2 (B) is an exploded view of the circular track and spindle structure according to an embodiment of the present invention

Fig. 3 is a schematic view of a conveyor belt and a rotating shaft structure according to another embodiment of the invention.

Fig. 4 is a schematic view of a magnetic member carrier according to another embodiment of the invention.

Fig. 5 is a schematic view of a rotor structure of another embodiment of the present invention.

Fig. 6 is a schematic view of a magnetic member according to another embodiment of the present invention.

Fig. 7 is a schematic diagram of a generator according to another embodiment of the present invention.

Description of the symbols:

generator 1

Rotor structure 2

Circular track 20

The extension portion 20a

Bent portion 20b

Conveyor belt 201

Magnetic member carrier 202

Bearing 202b

Rotating shaft structure 21

Rotating shaft 210

Turning wheel 211

Recess 212

Magnetic member 22

Small-sized magnetic members 22a to 22d

Support 23

Hollow 231

Side plate 24

Hole 241

Stator structure 3

Coil 31

Arrangement direction D1

Direction of winding D2

Angle theta ₁

Detailed Description

The following embodiments are provided to clearly demonstrate the above and other technical matters, features and/or effects of the present invention when read in conjunction with the accompanying drawings. Through the description of the embodiments, the technical means and effects adopted by the invention will be further understood to achieve the aim. Further, since the present disclosure should be readily understood and implemented by those skilled in the art, all equivalent substitutions or modifications which do not depart from the concept of the present invention are intended to be included in the claims.

It should be noted that, unless otherwise specified herein, the use of the word "a" or "an" is not limited to a single element, but may refer to one or more additional elements.

Moreover, ordinal numbers such as "first" or "second" in the specification and claims are used merely to describe a claimed element, and do not represent or imply any order of ordinal numbers for the claimed element, and not between a claimed element and another claimed element or step of a manufacturing method. The use of ordinals is merely to distinguish one request element having a particular name from another request element having the same name.

Furthermore, the terms such as "adjacent" in the description and in the claims are used for describing mutual proximity and do not necessarily indicate mutual contact.

In addition, the description of the present invention regarding "…" or "…" and the like means "immediately, before or after" and the like, and is not limited to the case of simultaneous occurrence, and is described in advance. The description of "disposed on …" and the like in the present invention refers to the corresponding positional relationship between two elements, and does not limit whether or not the two elements are in contact with each other, unless otherwise specified, and is therefore described in advance. Furthermore, when multiple functions are recited in the present disclosure, if the word "or" is used between the functions, it means that the functions may exist independently, but it does not exclude that multiple functions may exist simultaneously.

In addition, the terms "connected" or "coupled" in the description and the claims may refer to not only a direct connection but also an indirect connection or an electrical connection with another element. In addition, electrical connection includes direct connection, indirect connection or the communication of radio signals between two elements.

Moreover, in the description and claims, the terms "about," "approximately," "substantially," and "approximately" generally refer to a range of values within 10%, or within 5%, or within 3%, or within 2%, or within 1%, or within 0.5% of the value associated with a given value. The amounts given herein are approximate, that is, the meanings of "about", "substantially" and "approximately" may be implied without specifically reciting "about", "approximately", "essentially" and "approximately". Furthermore, the terms "range from a first value to a second value" and "in-between" mean that the range includes the first value, the second value and other values in-between.

Furthermore, the technical features of different embodiments disclosed in the invention can be combined to form another embodiment.

Fig. 1 (a) is a schematic diagram of a generator 1 according to an embodiment of the present invention. Fig. 1 (B) is an exploded view of a generator 1 according to an embodiment of the present invention. As shown in fig. 1 (a) and 1 (B), the generator 1 includes a rotor structure 2 and a stator structure 3, wherein the stator structure 3 is disposed at the periphery of the rotor structure 2, for example, the stator structure 3 can surround most of the rotor structure 2, and is not limited thereto.

The rotor structure 2 may comprise at least one shaft structure 21 and a plurality of magnetic members 22. In one embodiment, the magnetic members 22 are spaced apart and arranged in a ring. In one embodiment, the shaft structure 21 drives the magnetic members 22 to move. The stator structure 3 may comprise at least one coil 31. When the shaft structure 21 drives the magnetic members 22 to move, the magnetic field of the magnetic members 22 of the rotor structure 2 can cut the coils 31 of the stator structure 3, thereby generating an electric field. Thereby, the generator 1 can generate power.

In another embodiment, in order to cut the magnetic field of the magnetic members 22 and the coil 31, a specific arrangement is provided between the magnetic members 22 and the coil 31. The magnetic members 22 may be disposed on a circular track 20 (shown in fig. 2) inside the rotor structure 2, wherein the magnetic members 22 are arranged along a direction (hereinafter referred to as an arrangement direction D1) on the circular track 20 (shown in fig. 2). Further, the coil 31 may be wound in another direction (hereinafter, referred to as a winding direction D2). In one embodiment, the arrangement direction D1 of the magnetic members 22 on the circular track 20 is different from the winding direction D2 of the coil 31, i.e. the arrangement direction D1 is not parallel to the winding direction D2. In one embodiment, the arrangement direction D1 and the winding direction D2 have an angle therebetween, wherein the angle θ 1 may be between 0 degrees and 180 degrees, and is greater than 0 degrees and less than 180 degrees (i.e., 0 ° < θ 1<180 °), and is not limited thereto. In one embodiment, the angle θ 1 may be between 70 degrees and 110 degrees (i.e., 70 ° < θ 1<110 °), and is not limited thereto. In one embodiment, the angle θ 1 may be 90 degrees (i.e., the arrangement direction D1 is orthogonal to the winding direction D2), and is not limited thereto. Thus, when the magnetic member 22 is moved by the rotation shaft structure 21, the magnetic field of the magnetic member 22 and the coil 31 can generate cutting.

In one embodiment, the material of the coil 31 may be silver, copper, aluminum, an alloy thereof, or a combination thereof, but the invention is not limited thereto.

The details of the rotor structure 2 are explained next. Fig. 2 (a) is an exploded view of a rotor structure 2 according to an embodiment of the present invention, and please refer to fig. 1 (a) and 1 (B) simultaneously. As shown in fig. 2 (a), the rotor structure 2 may include an annular track 20, two shaft structures 21, a plurality of magnetic members 22, a support 23 and two side plates 24.

The two shaft structures 21 and the supporting member 23 can be disposed inside the circular track 20. The rotating shaft structure is used for driving the annular track 20 to rotate. The supporting member 23 is used for supporting the circular track 20, for example, the two shaft structures 21 can be respectively disposed at two ends inside the circular track 20, and the supporting member 23 can be disposed at a middle portion inside the circular track 20 to support the circular track 20, but is not limited thereto. The magnetic members 22 are disposed on the circular rail 20 and arranged along the circular rail. Two side plates 24 are respectively disposed on two sides of the circular rail 20.

In one embodiment, the circular track 20 may be of various shapes, and the invention is not limited thereto. In one embodiment, the circular track 20 may be a shape other than a circle, such as an ellipse, a rectangle, etc., and is not limited thereto. In an embodiment, the circular track 20 may include two extending portions 20a and two bending portions 20b, wherein the area of the extending portion 20a is larger than the area of the bending portion 20b, and thus the number of the magnetic members 22 on the extending portion 20a may be greater than the number of the bending portions 20b, and is not limited thereto.

In one embodiment (for example, as shown in fig. 2 (a)), the number of the shaft structures 21 is 2, but it should be noted that in other embodiments, the number of the shaft structures 21 may be changed, for example, it may be 1 or more than 2, as long as the ring track 20 is driven to rotate. In an embodiment, the rotating shaft structure 21 may be connected to an external power input mechanism (e.g. a motor, etc.) and controlled by the external power input mechanism to rotate, but is not limited thereto.

In one embodiment, the magnetic member 22 may be, for example, an electromagnet or a permanent magnet, but is not limited thereto. In one embodiment, when the magnetic element 22 is a permanent magnet, the material thereof can be selected from a group consisting of iron, nickel, aluminum, copper, cobalt, titanium, chromium, silicon, barium, strontium, neodymium, boron, or an alloy or combination thereof, or other materials with magnetic properties, but not limited thereto. In an embodiment, the shape of each magnetic element 22 is not particularly limited, and may be, for example, circular, oval, rectangular, triangular, pentagonal, etc., or other irregular shapes. In addition, each magnetic member 22 may be made of the same or different material; the shape of each magnetic member 22 may be the same or different from each other. In one embodiment, the magnetic polarities of adjacent magnetic elements 22 facing the coil 31 may be the same as each other, but may be different as long as they generate a magnetic field with the coil 31. In one embodiment, the number of magnetic elements 22 is not limited, but is preferably an even number. In one embodiment, the magnetic members 22 are arranged at intervals on the circular track 20, and each interval may be the same or different, for example, the magnetic members 22 may be distributed throughout the circular track 20, and there may be an interval between each magnetic member 22. The present invention is not limited thereto.

In one embodiment, the supporting member 23 may have various shapes, and the present invention is not limited thereto. In one embodiment, the supporting member 23 may include at least one hollow 231, for example, but not limited to, the supporting member 23 may have an H-shape.

In an embodiment, the side plate 24 may include holes 241 corresponding to the number of the shaft structures 21, so that the shaft structures 21 may extend outside the rotor structure 2 through the holes 241, but is not limited thereto.

The details of the endless track 20 are explained next. Fig. 2 (B) is an exploded view of the circular track 20 and the spindle structure 21 according to an embodiment of the present invention, and please refer to fig. 1 (a) to 2 (a) at the same time. As shown in fig. 2 (B), the endless track 20 may include at least one conveyor 201 disposed on the spindle structure 21.

In an embodiment, the conveying belt 201 may be a belt or a chain, and is not limited thereto.

In an embodiment, the circular track 20 may further include a plurality of magnetic carriers 202 disposed on the conveyor belt 201, so that when the conveyor belt 201 is driven by the rotating shaft structure 21 to rotate, the magnetic carriers 202 can move along with the rotation of the conveyor belt 201. In an embodiment, each magnetic device carrying platform 202 may include a placing portion for placing the magnetic device 22 thereon, and the two may be fixed together in various feasible manners, such as locking, pivoting, welding, fastening, and the like, but not limited thereto. In addition, in an embodiment, two ends of magnetic carrier 202 are further respectively provided with a bearing 202b, wherein each bearing 202b may be adjacent to an inner wall of one of side plates 24. In one embodiment, the bearing 202b may contact the inner wall of the side plate 24, but is not limited thereto.

In addition, each of the shaft structures 21 may include a rotating shaft 210 and at least one rotating wheel 211, wherein the rotating shaft 210 passes through the middle of the rotating wheel 211. In an embodiment, the rotating wheel 211 is fixed to the rotating shaft 210, so that the rotating shaft 210 can drive the rotating wheel 211 to rotate, but not limited thereto. In one embodiment, the rotating wheel 211 may have an inner recess 212 for the belt 201 to be placed, and thus the rotating wheel 211 may be a pulley, such as a timing pulley, but not limited thereto. In an embodiment, the size of the fillet 212 may correspond to the width of the carrier tape 201. In addition, in an embodiment, the concave portion 212 of the rotating wheel 211 may have a plurality of tooth slots, and the contact surface between the conveying belt 201 and the concave portion 212 may also have corresponding tooth slots, but is not limited thereto.

In one embodiment, each shaft structure 21 may have the same number of wheels 211, but is not limited thereto. In an embodiment, the number of the rotating wheels 211 may be the same as the number of the conveying belts 201, but is not limited thereto. In addition, it should be noted that although in fig. 2 (B), each rotating shaft structure 21 has 3 rotating wheels 211 and the endless track 20 has 3 conveying belts 201, in practice, the number of the rotating wheels 211 and the conveying belts 201 is not limited, i.e. the number of the rotating wheels 211 and the conveying belts 201 can be adjusted according to actual requirements.

The conveyor belt 201 and the rotating shaft structure 21 of the present invention may have different embodiments. Fig. 3 is a schematic view of a conveyor belt 201 and a rotating shaft structure 21 according to another embodiment of the invention, and please refer to fig. 1 (a) to fig. 2 (B) at the same time.

As shown in fig. 3, each rotating shaft structure 21 of the present embodiment may have a single rotating wheel 211, but the width of the rotating wheel 211 is much larger than that of the rotating wheel 211 in the embodiment of fig. 2 (B), for example, the width of each rotating wheel 211 in the embodiment of fig. 2 (B) is smaller than half of the length of the rotating shaft 210, and the width of the single rotating wheel 211 in the embodiment of fig. 3 is larger than half of the length of the rotating shaft 210. In addition, the conveyor belt 201 of the embodiment of fig. 3 is also adjusted to be 1 with the number of the turning wheels 211, and the width of the conveyor belt 201 can also be increased with the change of the width of the turning wheels 211. The present invention is not limited thereto.

Thus, different embodiments of the conveyor belt 201 and the spindle structure 21 can be understood. It is to be noted that the details of the respective elements in the present embodiment can be applied to or combined with the various descriptions in the foregoing embodiments as far as possible.

Various embodiments of magnetic device stage 202 are also possible. Fig. 4 is a schematic view of a magnetic member carrier 202 according to another embodiment of the present invention, and please refer to fig. 1 to fig. 3.

As shown in fig. 2 (B) and fig. 4, in the embodiment of fig. 2 (B), one magnetic member 22 can be placed on each magnetic member carrier 202, but in the embodiment of fig. 4, the width of the magnetic member carriers 202 in the arrangement direction D1 can be increased, so that a plurality of magnetic members 22 can be placed. The present invention is not limited thereto.

Thus, various implementations of magnetic element stage 202 may be understood. It is to be noted that the details of the respective elements in the present embodiment can be applied to or combined with the various descriptions in the foregoing embodiments as far as possible.

The rotor structure 2 of the present invention may also have various embodiments. Fig. 5 is a schematic view of a rotor structure 2 according to another embodiment of the present invention, and please refer to fig. 1 to 4.

In the above embodiment, the circular rail 20 has the supporting member 23, and the supporting member 23 supports the middle portion thereof, however, in the embodiment of fig. 5, the circular rail 20 may not have the supporting member, and the position of the supporting member is replaced by more rotating shaft structures 21. Therefore, the hinge structures 21 can be used to support the circular track 20, and the rotation of the conveyor belt 201 can be more smooth due to the increased number of hinge structures 21. The present invention is not limited thereto. In one embodiment, a portion of the shaft structure 21 does not have a shaft but only a wheel. In one embodiment, the stator structure 3 may be changed with the addition of the shaft structure 21.

In this way, different embodiments of the rotor structure 2 can be understood. It is to be noted that the details of the respective elements in the present embodiment can be applied to or combined with the various descriptions in the foregoing embodiments as far as possible.

The magnetic member 22 of the present invention can have various embodiments. Fig. 6 is a schematic view of a magnetic element 22 according to another embodiment of the present invention, and please refer to fig. 1 to 5.

As shown in fig. 5, each magnetic member 22 may be composed of a plurality of small magnetic members 22a to 22d, wherein one end of the small magnetic member 22a is connected to one end of the small magnetic member 22b, the other end of the small magnetic member 22b is connected to one end of the small magnetic member 22c, and the other end of the small magnetic member 22c is connected to one end of the small magnetic member 22 d. In one embodiment, the magnetic member 22 of the present embodiment may be a Halbach magnet, but is not limited thereto.

In one embodiment, the small magnetic members 22 a-22 d may have different magnetic polarities, such as the magnetic polarity (e.g., N-pole) of the small magnetic member 22a facing the coil 31 is different from the magnetic polarity (e.g., S-pole) of the small magnetic member 22b facing the coil 31, the magnetic polarity (e.g., S-pole) of the small magnetic member 22b facing the coil 31 is different from the magnetic polarity (e.g., N-pole) of the small magnetic member 22c facing the coil 31, and the magnetic polarity (e.g., N-pole) of the small magnetic member 22c facing the coil 31 is different from the magnetic polarity (e.g., S-pole) of the small magnetic member 22d facing the coil 31. In addition, in one embodiment, the magnetic polarity arrangement of the small magnetic members 22 a-22 d in each magnetic member 22 may be the same as, but may be different from, the magnetic polarity arrangement of the small magnetic members 22 a-22 d in the adjacent magnetic member 22.

Thus, various embodiments of the magnetic element 22 can be understood.

In addition, the generator 1 of the present invention may also have different embodiments. Fig. 7 is a schematic diagram of a generator 1 according to an embodiment of the invention, and please refer to fig. 1 (a) to fig. 6 at the same time.

In contrast to the previous embodiments, the coils 31 of the embodiment of fig. 7 may instead be provided in the hollow portion 231 of the support 23 of the rotor structure 21. In addition, in an embodiment, the coil 31 surrounding the outside of the rotor structure 2 in the aforementioned embodiment can be removed, so that the stator structure 3 can be considered to be disposed inside the rotor structure 2. In addition, in one embodiment, the rotor structure 21 may be provided with coils 31 both inside and outside, i.e. combining the embodiment of fig. 1 (B) with the embodiment of fig. 7, for example.

Thereby, different aspects of the generator 1 can be understood.

According to the embodiment of the invention, the generator and the rotor structure of the invention are provided with the annular track, and the magnetic members are arranged on the annular track at intervals. Since the non-circular annular track has a longer extension portion, more magnetic members can be disposed thereon, and thus, compared with the prior art (e.g., a circular rotor structure), the rotor structure of the present invention can perform more cuts with the coils of the stator structure, thereby greatly improving the torque of the generator. In addition, since the length of the circular track can be adjusted according to the requirement, compared with the prior art, the structure of the invention also has the expandable characteristic.

Features of the embodiments of the invention may be combined and matched as desired without departing from the spirit or ambit of the invention.

The above-described embodiments are merely exemplary for convenience in explanation, and the scope of the claims of the present invention should be determined by the claims rather than by the limitations of the above-described embodiments.

Claims

1. An electrical generator, comprising:

a rotor structure, comprising:

an annular track;

the at least one rotating shaft structure is arranged in the annular track and used for driving the annular track to rotate; and

the plurality of magnetic pieces are arranged on the annular track; and

and the stator structure comprises at least one coil, and is arranged at the periphery or inside of the rotor structure.

2. The generator of claim 1 wherein said magnetic members displace as said circular orbit rotates and produce a magnetic field cut with said coil.

3. The generator according to claim 2, wherein a winding direction of the coil and an arrangement direction of the magnetic members on the circular orbit have an angle therebetween, wherein the angle is greater than 0 degree and less than 180 degrees.

4. The electrical machine of claim 3, wherein the annular track is non-circular in shape.

5. The generator according to claim 3, wherein the at least one rotating shaft structure is a plurality of rotating shaft structures, and the endless track comprises at least one conveyor belt disposed on the rotating shaft structures.

6. The generator according to claim 5, wherein the endless track further comprises a plurality of magnetic piece carriers disposed on the conveyor belt, each magnetic piece carrier for holding a magnetic piece.

7. The generator of claim 6 wherein each end of the magnetic member carriers comprises a bearing.

8. The generator according to claim 7, wherein the rotor structure further comprises two side plates disposed at two sides of the circular track, and one end of the magnetic material carrying stages is adjacent to an inner wall of one of the side plates.

9. The generator of claim 1 wherein the circular track comprises two extending portions and two bending portions, wherein the area of each extending portion is greater than the area of each bending portion.

10. The generator of claim 1 wherein said endless track comprises a conveyor belt, said conveyor belt being a chain or belt.

11. A rotor structure for use in a generator, wherein the generator further comprises a stator structure, and the stator structure comprises at least one coil, wherein the rotor structure comprises:

an annular track;

the plurality of magnetic pieces are arranged on the annular track; and

the stator structure is arranged at the periphery or inside of the rotor structure.

12. The rotor structure of claim 11, wherein said magnetic members displace as said circular track rotates and produce a magnetic field cut with said coil.

13. The rotor structure according to claim 12, wherein a winding direction of the coil and an arrangement direction of the magnetic members on the circular orbit have an angle therebetween, wherein the angle is greater than 0 degree and less than 180 degrees.

14. The rotor structure of claim 13, wherein the annular track is non-circular in shape.

15. The rotor structure according to claim 13, wherein the at least one hinge structure is a plurality of hinge structures, and the endless track comprises at least one belt disposed on the hinge structures.

16. The rotor structure of claim 15, wherein the circular track further comprises a plurality of magnetic piece carriers disposed on the conveyor belt, and each magnetic piece carrier is used for holding a magnetic piece.

17. The rotor structure according to claim 16, wherein the two ends of the magnetic carriers respectively comprise a bearing.

18. The rotor structure of claim 17, further comprising two side plates disposed on two sides of the circular track, wherein one end of the magnetic carriers is adjacent to an inner wall of one of the side plates.

19. The rotor structure of claim 11, wherein the circular track comprises two extending portions and two bending portions, wherein the area of each extending portion is larger than the area of each bending portion.

20. The rotor structure of claim 11, wherein the endless track comprises a conveyor belt, the conveyor belt being a chain or belt.