WO2009036666A1

WO2009036666A1 - Generator

Info

Publication number: WO2009036666A1
Application number: PCT/CN2008/071548
Authority: WO
Inventors: Liwen Chen
Original assignee: Liwen Chen
Priority date: 2007-09-17
Filing date: 2008-07-04
Publication date: 2009-03-26
Also published as: CN101394112A; CN101394112B

Abstract

A generator. An external stator (3) of the generator includes a ring-type iron core (31) and a winding (32). In the axial direction, the iron core (31) includes a number of outer slots (312) and a number of inner slots (311) with equal slot width (W1) and equal slot depth. The winding (32) is continually wrapped around the inner slots (311) and the outer slots (312) of the external stator (3). Pairs (41) of excitation magnets are symmetrically fixed on a rotor (4) of the generator along a center shaft (2). Facing the inner slots (311), the polarities of magnetic poles of two excitation magnets (411,412) included in each pair (41) of the excitation magnets are opposite to each other. Between two excitation magnets (411,412) included in each pair (41) of the excitation magnets, there is a certain interval. Every excitation magnet (411,412) has a certain thickness. When the rotor (4) is rotating, while one excitation magnet (411,412) included in each pair (41) of excitation magnets is passing through a position under one inner slot (311), another excitation magnet (411,412) included in each pair (41) of excitation magnets will not pass though positions under anyone of the slots (311).

Description

a generator

Technical field

The invention belongs to a generator, in particular to a synchronous alternator. Background technique

Generators of the prior art are typically constructed of components such as a stator, a rotor, an end cap, and bearings. The stator is composed of a stator core, a wire winding, a base, and other structural members that fix these portions. The rotor is composed of components such as excitation, fan and shaft. The stator and the rotor cover are assembled by the bearing and the end cover, so that the rotor can rotate in the stator to make the movement of the cutting magnetic line, thereby generating an induced potential, which is led out through the terminal. When connected to the loop, a current is generated.

1 is a typical generator structure including a central shaft 800, a fixed stator 801 and a rotatable rotor 802, wherein the rotor 802 is provided with an excitation magnet, and the stator 801 is an outer stator including a stator iron. The core 811 and the winding 812, the inner surface of the stator core 811 is provided with a plurality of inner circumferential surface grooves extending in the axial direction and extending over the entire stator core, wherein the windings 812 are equally spaced in the grooves; When the external force drives the rotation, the excitation magnet in the excitation coil generates an induced electromotive force. When the winding is externally connected with a load, a current flows in the winding to generate a magnetic field, thereby generating electromagnetic force to hinder the rotation of the rotor. In this way, part of the power is consumed, which in turn reduces the efficiency of the generator. Utility model content

An object of the present invention is to solve the deficiencies in the prior art and provide an efficient transmission. In order to achieve the above object, the high-efficiency generator of the present invention comprises a casing, a central shaft fixed to the casing, an outer stator fixed to the casing, and a rotor rotatable coaxially with the outer stator and disposed around the central axis; The outer stator comprises an outer annular stator core and an outer stator winding, and an outer circumferential surface of the outer stator core has a plurality of inner circumferential surface grooves having the same groove width and groove depth, and the outer stator winding is continuously wound outside. On the inner circumferential surface groove and the outer circumferential surface groove of the stator core, on the rotor, a plurality of pairs of excitation magnets are arranged symmetrically along the center of the central axis, and each pair of excitation magnets is arranged in such a manner that the two excitation magnets face the inner circumferential surface groove The polarity of one side magnetic pole is opposite, and there is a certain distance between the two excitation magnets, and the excitation magnet has a certain thickness to ensure that when the rotor rotates, one of the excitation magnets passes through an inner circular surface groove, and the inner circular surface groove The winding coil cuts the magnetic field of the excitation magnet, while the other excitation magnet does not pass through any of the inner circular surface grooves, and the field of the excitation magnet is not cut by any outer stator winding coil

Preferably, the outer stator core further includes a plurality of outer circumferential surface grooves having the same number of grooves on the inner circumferential surface and the groove width and having the same radial position. By providing the outer circumferential surface groove, on the one hand, the outer stator winding can be fixed more securely, and on the other hand, the magnetic resistance can be reduced and the efficiency of the generator can be increased.

Further, the rotor further includes a fixing device including a pair of discs for fixing the field magnets and a pair of lands for coupling the discs to the central shaft.

Preferably, the disc and the lands are made of a material that is non-magnetic, such as stainless steel or aluminum alloy.

Preferably, the method further includes an inner stator fixed between the rotor and the central shaft and fixed to the central shaft, the inner stator including an annular inner stator core and an inner stator winding, and extending in the axial direction of the inner stator core An outer circumferential surface groove having the same groove width and groove depth, the inner stator winding is continuously wound over the outer circumferential surface groove of the inner stator core.

Preferably, the width of the inner circumferential surface groove is twice the thickness of one excitation magnet, and the inner circumferential surface groove The inner circumferential spacing (arc length) is twice the groove width (arc length) of the inner circumferential surface. The spacing between any two excitation magnets at the inner circular end of the outer stator is four times the groove width, and any two excitation magnets are outside the inner stator. The spacing of one end is the one-time slot width and the four-fold slot width which alternately appear.

Preferably, the width of the excitation magnet may also be twice the groove width of the inner circumferential surface of the outer stator, such that the interval between the grooves of the inner circumferential surface of the outer stator is three times the groove width, and any two excitation magnets are at the inner end of the inner stator. The spacing is five times the slot width, and the spacing between any two excitation magnets at one end of the outer circumference of the stator is an alternate one-slot width and five times the slot width.

Preferably, the outer circumferential surface groove width (arc length) of the inner stator is equal to the inner circumferential surface groove width (arc length) of the outer stator, and the inner stator outer circumferential surface groove groove spacing (arc length) is equal to the outer stator inner circumference The groove pitch (arc length) of the inner circumferential surface groove between the surface grooves.

Preferably, the inner stator core further includes a plurality of inner circumferential surface grooves having the same number of grooves on the outer circumferential surface and the groove width and having the same radial position. By providing the inner circumferential surface groove, on the one hand, the inner stator winding can be fixed more securely, and on the other hand, the magnetic resistance can be reduced and the efficiency of the generator can be increased.

Further, the circumferential arc length ratio of the inner circumferential surface of the outer stator core to the outer circumferential surface of the inner stator core is three to two.

Further, the excitation magnet is arranged in a plurality of centrally symmetrical V-shapes.

An advantage of the present invention is that by providing a groove provided on the outer circumferential surface of the outer stator, the generated side magnetic field can be cancelled, and thus the negative work done by the generator is reduced, and the efficiency of the generator is increased. DRAWINGS

FIG. 1 is a structural schematic diagram of a generator in the prior art. 2 is a cross-sectional view showing the structure of a college electrical generator in accordance with an embodiment of the present invention.

Figure 3 is an enlarged view of a sector portion of the cross-sectional view of Figure 2.

4 is a structural view of a disk in a fixing device in accordance with an embodiment of the present invention. Figure 5 is a structural view of an outer stator core in accordance with an embodiment of the present invention.

Figure 6 is a cross-sectional view showing the structure of a high efficiency generator in a second embodiment of the present invention. Figure 7 is an enlarged view of a sector portion of the cross-sectional view of Figure 6.

Figure 8 is a structural view of a disk in a fixing device in a second embodiment of the present invention. Figure 9 is a structural view of an outer stator core according to a second embodiment of the present invention.

Figure 10 is a structural view of an inner stator core in accordance with a second embodiment of the present invention.

Figure 11 is a side cross-sectional view showing the structure of the center shaft with the inner stator and the rotor.

detailed description

The invention relates to an efficient high-frequency generator for efficiently generating electric energy. The features of the present invention are described in detail below with reference to the accompanying drawings:

2 is a cross-sectional view showing the structure of an efficient high-frequency generator according to an embodiment of the present invention. The high-efficiency high-frequency generator, as shown in FIG. 2, includes a casing 1, and a central shaft 2 disposed in the casing, fixed to An outer stator 3 of the casing 1, and a rotor 4 disposed coaxially with the outer stator and rotatable about a central axis. Referring to FIG. 3, the rotor 4 includes a plurality of sets of field magnets 41 and a fixture 42. The plurality of sets of field magnets 41 are axially symmetrically disposed along a central axis 2, and each set of field magnets includes a first field magnet 411 and a second field magnet 412, The magnetic poles of one of the excitation and second excitation magnets disposed on one side toward the outer stator have opposite magnetic properties. For example, if the magnetic field of the first field magnet 411 facing the outer stator is extremely N pole, then the magnetic field of the second field magnet toward the outer stator Extremely s pole.

The plurality of sets of field magnets 41 are fixed to the central shaft by a fixing device 42. The fixing device 42 includes a pair of discs 421 for fixing the exciter and a connecting disc 422 coupling the disc 421 to the central shaft, and FIG. 4 shows the disc. The structure of the 421, as shown, has a central hole 423 through which the central shaft passes, and a fixing hole 424 to which an axial fan or pulley is attached. A plurality of sets of field magnets 41 are disposed between the two disks. The disc needs to be made of a non-magnetic material such as stainless steel or aluminum alloy.

The structure of the outer stator 3 is as shown in FIG. 3, and includes an annular outer stator core 31 and an outer stator winding 32. The structure of the outer stator core is as shown in FIG. 5. Referring to FIG. 5, the shaft extending to the outer stator core 31 can be seen. a plurality of outer circumferential surface grooves 312 having a plurality of inner circumferential surface grooves 311 having the same groove width and groove depth and the same as the inner circumferential surface groove number and groove width; wherein the inner circumferential surface groove The groove width W1 of 311, (the groove width is the same in arc length, and thereafter the same) is not less than twice the width of the first field magnet 411 or the second field magnet 412, and the outer stator core portion between adjacent inner grooves The interval W2 (the interval is the same in arc length, the same thereafter) is equal to twice the inner circumferential surface groove width W1, and the outer stator outer circumferential surface groove 32 has the same groove width as the outer stator inner circumferential surface groove. The outer stator winding 32 is continuously wound over the inner circumferential surface groove and the outer circumferential surface groove of the outer stator core 31.

Among them, the outer stator core 31 can be made by pressing a 0.2 or 0.5 mm thick silicon steel sheet or other soft magnetic material. Insulating material is also placed in each inner circumferential surface groove and inner circumferential surface groove. For example, insulating paper or the like.

The outer stator winding 32 is wound in the following manner: it may be wound from the outer circumferential surface groove to the inner circumferential surface or may be grooved from the inner circumferential surface groove to the outer circumferential surface, either of which. As shown in FIG. 7, the inner circumferential surface groove B is wound from the outer circumferential surface groove A, and the two grooves are wound up or wound up in advance. After the number of turns, the groove A is slanted to the inner circumferential surface groove D and then turned to the outer circumferential surface groove (. until the groove (, D is full, and then diagonally diagonally from the groove C to the inner circumferential surface groove) In this way, all the grooves can be wound up in sequence. The number of turns of each groove of the outer stator core should be equal, and the cross-sectional area of the lines should be equal. Preferably, in order to reduce the internal resistance of the coil , It is possible to wind multiple enameled wires or yarn wrapped wires in parallel.

When the rotor rotates relative to the outer stator, and the output end of the outer stator winding 32 is connected to the load, a current flows in the winding. At this time, according to the principle of generating a magnetic field in the energized coil, the outer stator winding 32 generates a magnetic field in each slot. The magnetic field direction or the magnetic pole direction of the magnetic field generated by the winding coil can be determined by Ampere's rule. Using Ampere's rule to mark the polarity of the magnetic field generated by the winding coils of each slot of the stator core, it can be seen that the cores between the adjacent two slots are opposite polarities. Since their polarities are opposite and in the same region, the generated side magnetic fields can cancel each other out. Since the magnetic induction line of the magnetic field does not all go inside the core. There is always a part that passes through the air and goes to the other pole. Like the leakage magnetic phenomenon of the transformer, a weak magnetic field appears on the surface of the stator core. The magnetic field formed by the current when energized is regarded as the magnetic field generated by the electromagnetic induced current. These magnetic fields fulfill the total work done by the magnetic induction system as negative work. The ampere-amplitude of the induced current is achieved by a magnetic field, and no force is generated without a magnetic field. The magnetic field generated by the current coil of the generator can cancel a part of the magnetic field. The negative current of the induced current on the electromagnetic induction system is also reduced, and the efficiency of the generator is improved.

The plurality of pairs of exciting magnets 41 may employ a plurality of strong magnetic permanent magnets, the length of which is equal to or slightly longer than the thickness of the outer stator core silicon steel sheets. This facilitates the fixing of the field magnet to the rotor, and the thickness W3 of the field magnet is half the groove width of the groove in which the magnetic pole faces. Assuming that the inner circumferential surface groove has a width of 8 mm, the excitation magnet has a thickness of 4 mm. FIG. 6 is a cross-sectional view showing a structure of a high-efficiency generator in a second embodiment of the present invention, including a casing 1 disposed with a central shaft 2 in the casing, and an outer stator 3 fixed to the casing 1 and The rotor 4, which is coaxially disposed on the outer stator, is rotatable about a central axis, and is disposed between the rotor 4 and the central shaft 2, and further includes an inner stator 5 fixed to the central shaft.

Referring to FIG. 7, the rotor 4 includes a plurality of sets of field magnets 41 and a fixing device 42. The plurality of sets of field magnets 41 are axially symmetrically arranged along the central axis 2, and each set of field magnets includes a first field magnet 411 and a second field magnet 412, The magnetic poles of one of the excitation and second excitation magnets disposed on one side toward the outer stator have opposite magnetic properties. For example, if the magnetic pole of the first field magnet 411 facing the outer stator is N pole, then the magnetic pole of the second field magnet toward the outer stator is the S pole.

The plurality of sets of field magnets 41 are fixed to the central shaft by a fixing device 42. The fixing device 42 includes a pair of discs 421 for fixing the field magnets and a lands 422 for coupling the discs to the center shaft 2, and FIG. 8 shows The structure of the disk 421, as shown, has a central hole 423 through which the central shaft passes, and a fixing hole 424 to which an axial fan or pulley is attached. A plurality of sets of field magnets 41 are disposed between the two disks. The disc needs to be made of a non-magnetic material such as stainless steel or aluminum alloy.

The outer stator 3 has a structure as shown in FIG. 7, and includes an outer annular stator core 31 and an outer stator winding 32. The structure of the outer stator core is as shown in FIG. 9. Referring to FIG. 9, a plurality of inner circumferential surface grooves 311 and inner circumferential surface grooves having the same groove width and groove depth extending in the axial direction of the outer stator core 31 are provided. a plurality of outer circumferential surface grooves 312 having the same number and groove width and having the same radial position; wherein the groove width W1 of the inner circumferential surface groove 31 is equal to twice the width W3 of the first field magnet 411 or the second field magnet 412 The interval W2 of the outer stator core portion between adjacent inner grooves is larger than twice the inner circumferential surface groove width W1, and the outer stator outer circumferential surface groove 312 has a groove width equal to the outer stator inner circumferential surface groove. The outer stator winding 32 is continuously wound The inner circumferential surface groove and the outer circumferential surface groove of the outer stator core 31 are formed.

The structure of the inner stator 5 is as shown in Fig. 7, and includes an inner stator core 51 and an inner stator winding 52 which are annular. 10 shows the structure of the inner stator core. Referring to FIG. 10, the inner stator core 51 has a plurality of inner circumferential surface grooves 511 having the same groove width and groove depth and a groove with the inner circumferential surface extending in the axial direction of the inner stator core 51. a plurality of outer circumferential surface grooves 512 having the same number and groove width and having the same radial position; wherein the groove width (arc length) W4 of the inner circumferential surface groove 511 may be equal to that of the first field magnet 411 or the second field magnet 412 Two times the width W3, the arc length W5 of the inner stator core portion between adjacent inner grooves is greater than or equal to twice the inner circumferential surface groove width (arc length) W4, and the inner stator outer circumferential surface groove 512 has a groove width and a predetermined The groove width of the inner circumferential surface groove is equal. The inner stator winding 52 is continuously wound over the inner circumferential surface groove and the outer circumferential surface groove of the inner stator core 51. The winding method is the same as the winding of the outer stator.

As a preferred embodiment, the circumferential arc length ratio of the inner circumferential surface of the outer stator core 31 to the outer circumferential surface of the stator core in 51 is three to two. That is, the outer circumference of the inner stator core should be two-thirds of the inner circumference of the outer stator core, and the number of inner circumferential surface grooves (or outer circumferential surface grooves) of the inner stator core is also the groove of the outer stator core. Two-thirds of the number. The inner circumferential surface groove of the outer stator core and the outer circumferential surface groove of the inner stator core and the interval (arc length) between the inner circumferential surface groove and the groove are one to two. For example, if the width (arc length) of the inner circumferential surface groove is set to 8 mm, then the interval (arc length) between the inner circumferential surface groove and the groove should be 16 mm.

As another feasible implementation manner, the width of the excitation magnet may also be twice the groove width of the inner circumferential surface of the outer stator, such that the interval between the inner circumferential surface grooves of the outer stator is three times the groove width, and any two excitation magnets are outside. The spacing between one end of the inner circumference of the stator is five times the slot width, and the spacing between any two excitation magnets at one end of the inner circumference of the stator is an alternate one-slot width and five times the slot width. The outer circumferential surface of the outer stator core and the inner circumferential surface of the inner stator core are not opposite to the excitation, and the arc length of the groove and the interval between the adjacent grooves and the groove are not necessarily in the above-mentioned ratio.

In addition, in order to obtain the best power generation effect, the width and depth of the grooves on the same stator core are equal. The arc length between the groove and the groove on the same circumference should also be equal.

The same stator core, outer stator core or inner stator core, the number of inner circumferential surface grooves is equal to the number of outer circumferential surface grooves. The specific number is determined by the circumferential arc length of the actual core and the design width. Since the arc length of the inner circumferential surface of the same stator core is always equal to the arc length of the outer circumferential surface. In actual use, the number of inner circumferential surface grooves is equal to the number of outer circumferential surface grooves. The inner circumferential surface of the inner stator core may have a small spacing between adjacent grooves and grooves, but should not be zero.

The excitation magnet can use a plurality of strong magnetic permanent magnets. When the design size of the generator is large, a wound electromagnet can also be used; the length of the excitation magnet is equal to or slightly longer than the thickness of the outer stator core silicon steel sheet. This is convenient for fixing the excitation magnet to the rotor. The width of the excitation magnet is the distance between the inner circumference of the outer stator core and the outer pole of the inner stator core. Because the magnet needs to rotate, the excitation magnet width is slightly shorter than their linear distance. a little bit. As long as the field magnet rotates, it will not rub against the stator. The thickness of the field magnet W2 is half the groove width of the groove in which the magnetic pole faces. It is assumed that the inner circumferential surface groove of the outer stator (or the outer circumferential surface groove of the inner stator) has a width of 8 mm, and the thickness of the exciting magnet is 4 mm.

When the outer circumference of the inner stator core is equal to 2/3 of the inner circumference of the outer stator core, a magnetic field is established every four times of the inner circumference of the outer stator core. That is, one magnetic pole of one magnet faces directly, and the other magnetic pole faces the outer circumferential surface of the inner stator core. There are two kinds of magnetic field spacing on the outer circumference of the inner stator core, and the interval between the adjacent magnetic fields is the core groove width. The other is that the adjacent magnetic field spacing is four times the width of the core slot. The above interval size takes the length of the arc. Not the length of the line between two points. The inner circle of the disc is just slightly larger than the outer circumference of the inner stator core, and does not rub when rotated. The outer circle of the disc is just slightly smaller than the inner circle of the outer stator core, and does not rub when rotated. Referring to Figures 4 and 8, the shaded portion on the disk is the discharge position of one wide side of the field magnet. In Figure 7, each pair of field magnets is placed in a plurality of center-symmetric V-shapes. The upper and lower ends of the shadow are respectively two magnetic poles of one excitation magnet, and the arc length of the two magnetic poles of the two excitation magnets 411 and 412 at the bottom of the V-shape is the groove width (arc length) of one groove. as the picture shows.

The V-shaped lower end magnetic poles are all facing the outer arc surface of the inner stator core. The upper end of the V-shaped magnetic pole faces the inner circumferential surface of the outer stator core. The magnetic pole pitch at the upper end of the V-shape is four times the slot pitch (arc length). As shown in the arc length shown in position XI in Fig. 7, the spacing between the bottom magnetic poles of the two adjacent V-shaped shapes is four times the groove width (arc length), as shown by the position of the arc length in the figure X2. The upper two pole spacings are still four times the slot width (arc length).

The above-mentioned magnetic poles are opposite to the stator core in such a manner that the arc length of the outer circumferential surface of the inner stator core is two-thirds of the arc length of the inner circumferential surface of the outer stator core. When the outer circumference of the small stator core is not more than two-thirds of the inner circumference of the large stator core, the spacing between the adjacent two excitation magnet poles should be adjusted accordingly. The first and second excitation magnets no longer conform to the symmetric V-shaped arrangement. No matter how the spacing between adjacent two adjacent magnetic poles is adjusted, the rotation of the magnet must be satisfied. When the stator core coil and the magnet move relative to each other, the coil cuts the magnetic pole. The magnetic induction line, and in the same period of time, the magnetic field of the same stator core coil is the same, that is, both the N-pole magnetic field or the S-pole magnetic field. Only when the above conditions are met, the electric energy generated by simultaneously cutting a plurality of magnetic field lines of the same coil will accumulate.

Preferably, the radius of the inner circumference of the outer stator core minus the outer circle radius of the inner stator core, the difference is 60 mm, and the depth of the inner stator core groove is between 170 mm and 200 mm, such core utilization highest.

If in the same time period, the same stator coil has a cutting N-pole magnetic field and a S-pole magnetic field is cut, the direction of the induced current generated by the coil cutting multiple magnetic fields is judged by Ampere, and the iron is combined. The winding direction of the core coil. It can be judged that the direction of the induced current of the coil is not in the same direction. Some currents are clockwise and some are counterclockwise. The same coil currents are opposite in direction, and the generated electrical energy cancels each other out. The power supplied to the outside world will be greatly reduced, or the power cannot be output at all.

When installing the inner and outer stator cores, the inner stator core is first mounted on the central shaft, and the inner stator core 5 is integrated with the central shaft 2 in a predetermined position, and the rotor 4 is then sleeved to the inner stator core. On the outer circumference of the 51, the rotor 4 is fitted to the center shaft 2 by means of its fixing means 42 by means of a pair of bearings so that the rotor can freely rotate about the central axis. One of the discs of the fixture 42 is fitted with an axial fan, and the other disc is fitted with a pulley. The outer stator 3 is mounted to the casing 1. Then, the center shaft with the inner stator core and the rotor is placed in the inner circle of the outer stator core, and the two stator core coils are directly opposite to the rotor. The casing 1 can be composed of two end caps with sufficient pressure bearing capacity, and the inner circumferential surface can have a ventilation groove 11 so that the wind generated by the axial fan can flow, thereby cooling the outer stator, and the outer circumference of the casing The surface may be provided with a zigzag groove 12 for further heat dissipation. The central shaft 2, as shown in Figs. 2, 11 and the inner stator can also be provided with an axial ventilation groove 21, so that the wind generated by the axial flow fan can also flow through the groove, thereby cooling the inner stator.

The terminals of the outer stator winding 32 and the inner stator winding 52 can be taken out from the casing 1 as an output. Before fixing the casing and the central shaft, the central shaft should be rotated so that the groove of the inner stator core and the midpoint of the partial groove of the outer stator core are in line, as shown. This reduces the magnetic reluctance, increases the magnetic flux that passes through the coil windings, and increases the amount of magnetic induction.

Install the inner stator, outer stator and rotor as required. The external force drives the rotor to make a circular motion around the central axis via a pulley. The inner and outer stator windings 32 induce an electromotive force in the stator winding due to electronic induction. At the same time, the current direction induced by the same stator core winding is determined by the right hand rule. The current sensed by each coil is the same. The electromotive force is added. There is a potential difference between the ends of the coil to deliver electrical energy to the outside world. When the size of the excitation rotor and the stator core and the number of winding turns are reasonable, the generator can issue a rated voltage at the rated speed and output the rated current to the outside. Since the generator has a large number of excitation pole pairs, the frequency of power generation is higher than the grid frequency.

The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. That is, equivalent changes and modifications made by the content of the patent application scope of the present invention should fall within the technical scope of the present invention.

Claims

Claim

1. A high-efficiency generator comprising a casing, a central shaft fixed to the casing, an outer stator fixed to the casing, and a rotor rotatable coaxially with the outer stator and disposed around the central axis; wherein: the outer The stator comprises an annular outer stator core and an outer stator winding, and an outer circumferential surface of the outer stator core has a plurality of inner circumferential surface grooves having the same groove width and groove depth, and the outer stator winding is continuously wound around the outer stator core Above the inner circumferential surface groove and the outer circumferential surface groove, on the rotor, a plurality of pairs of excitation magnets are symmetrically arranged along the center of the central axis, and each pair of excitation magnets is disposed in such a manner that the two excitation magnets face one side magnetic pole of the inner circumferential surface groove The polarity is opposite, there is a certain distance between the two excitation magnets, and the excitation magnet has a certain thickness to ensure that when the rotor rotates, one of the excitation magnets passes through one inner circular surface groove, and the other does not pass through any inner circular surface. groove.

2. The high-efficiency generator according to claim 1, wherein: the outer stator core further includes a plurality of outer circumferential surfaces having the same number of grooves on the inner circumferential surface and the groove width and having the same radial position.

1曰.

3. The high efficiency generator according to claim 1, wherein: the rotor further comprises a fixing device comprising a pair of discs for fixing the excitation magnets and a pair of couplings for coupling the discs to the central shaft. Land.

4. A high efficiency generator according to claim 3, wherein: the disc and the lands are made of a non-magnetic material such as stainless steel or aluminum alloy.

5. The high efficiency generator according to claim 1, further comprising: an inner stator fixed between the rotor and the central shaft and fixed to the central shaft, the inner stator including an annular inner stator core and an inner stator winding , extending in the axial direction of the inner stator core, having a plurality of grooves having the same groove width and groove depth The outer circumferential surface groove, the inner stator winding is continuously wound over the outer circumferential surface groove of the inner stator core.

6. The high efficiency generator according to claim 5, wherein: the width of the inner circumferential surface groove of the outer stator is twice the thickness of the excitation magnet, and the inner circumferential distance between the inner circumferential surface grooves is the inner circumferential surface groove width. Twice, the spacing between any two excitation magnets at one end of the inner circumference of the outer stator is four times the slot width, and the spacing between any two excitation magnets at one end of the inner circumference of the stator is alternately one-fold width and four times groove width.

7. The high efficiency generator according to claim 5, wherein: the width of the exciting magnet is twice the groove width of the inner circumferential surface of the outer stator, such that the interval between the inner circumferential surface grooves of the outer stator is three times the groove width. , the spacing between any two excitation magnets at one end of the inner circumference of the outer stator is five times the groove width, and the spacing between any two excitation magnets at one end of the outer circumference of the stator is alternately one-fold width and five times

1 see you.

8. The high efficiency generator according to claim 1, wherein: the outer circumferential surface groove width of the inner stator is equal to the inner circumferential surface groove width of the outer stator, and the inner stator outer circumferential surface groove groove spacing is equal to the outer stator The groove pitch of the inner circumferential surface groove between the inner circumferential surface grooves.

9. The high-efficiency generator according to claim 1, wherein the inner stator core further comprises a plurality of inner circumferential surface grooves having the same number of grooves on the outer circumferential surface and the groove width and having the same radial position.

10. The high efficiency generator of claim 1 wherein: the field magnets are arranged in a plurality of center-symmetrical V-shapes.