WO2005050821A2

WO2005050821A2 - Generator with high efficiency

Info

Publication number: WO2005050821A2
Application number: PCT/KR2004/002972
Authority: WO
Inventors: Jong Seok An
Original assignee: Lee, Chang Won; Lee, Myung Ho
Priority date: 2003-11-19
Filing date: 2004-11-17
Publication date: 2005-06-02
Also published as: KR20050048436A

Description

GENERATOR WITH HIGH EFFICIENCY

TECHNICAL FIELD The present invention relates to a power generator, and more particularly, a power generator capable of improving power generation efficiency by changing structure and arrangement of a stator body and a rotating body thereof.

BACKGROUND ART Power generators convert mechanical energy generated from various energy sources such as physical, chemical, and atomic energies into electrical energy. Although a linear-motion power generator has recently been developed, most of power generators are of a rotation type. In addition, all the power generators use the electromotive force generated based on electromagnetic induction. In general, a power generator comprises a magnetic field portion for generating a magnetic field and an electromagnetic portion for rotating within the magnetic field. The magnetic field portion comprises a plurality of magnets attached on a housing of the power generator. The electromagnetic portion is called an armature, a rotor, or a core, which generates another magnetic field with current flowing thereof. In a conventional power generator, a magnetic field generated around an electric wire in which a current flows has an attractive or repulsive force on another magnetic field generated by a permanent magnet or electromagnet. By the attractive or repulsive force, the rotor of the power generator rotates, so that power can be generated from the power generator. Like this, in the conventional power generator, the permanent magnet or electromagnet of the rotor mechanically rotates to generate the power. At the time of the rotator rotating, a reverse current is also generated based on the electromagnetic induction. In turn, the reverse current generates a reverse electromotive force, so that the rotor experiences an unnecessary load corresponding to twice power' generated by the power generator. Due to the unnecessary load, a relative power generation efficiency of the conventional power generator is disadvantageously reduced.

DETAILED DESCRIPTION OF THE INVENTION

Technical Goal of the Invention In order solve the aforementioned problems, an object of the present invention is to provide a power generator capable of improving power generation efficiency by changing structure and arrangement of a stator body and a rotating body. Technical Means for Solving the Problems According to an aspect of the present invention, there is provided a power generator having a stator body and a rotating body, wherein the stator body comprises: a first stator disk; a second stator disk separated by a predetermined distance from the first stator disk; at least one stator magnet disposed along each circumference of the first and second stator disks; at least one magnetic induction iron core connecting the first stator disk with the second stator disk; and coils wound around the magnetic induction iron cores, and wherein the rotating body comprises: a rotating shaft passing through centers of the first and second stator disks; a first rotating disk fixed at one end of the rotating shaft, thereby rotating together with the rotating shaft; second rotating disk fixed at the other end of the rotating shaft; at least one first rotating magnet disposed along each circumference of the first and second rotating disks; a rotor having a shape of cylinder, the rotor being fixed at the rotating shaft, the rotor disposed between the first and second rotating disks; and at least one second rotating magnets disposed on a circumferential surface of the rotor. In the above aspect of the present invention, it is preferable that diameters of the first and second stator disks of the stator body be larger than those of the first and second rotating disks of the rotating body, and the first and second rotating disks be disposed outside the first and second stator disks, respectively. In addition, it is preferable that the magnetic induction iron cores be disposed to surround the rotor of the rotating body. In addition, it is preferable that the number of the stator magnets of the stator body be equal to the number of magnetic induction iron cores, and the stator magnets and the corresponding magnetic induction iron cores be disposed on respective radial lines extending from a center of the first stator disk. In addition, it is preferable that the number of the first rotating magnets disposed along the circumference of the first rotating disk be equal to the number of the second rotating magnets, and the first rotating magnets and the corresponding second rotating magnets be disposed on respective radial lines extending from the rotating shaft.

Effect of the Invention According to the present invention, it is possible to improve power generation efficiency by changing structure and arrangement of a stator body and a rotating body of a power generator.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a power generator according to a preferred embodiment of the present invention; FIG. 2 is a cross-sectional view showing the power generator of FIG. 1 ; FIG. 3 is a front view showing the power generator of FIG. 1; FIG. 4 is a cross-sectional view showing a rotating body of the power generator according to the present invention; FIG. 5 is a front view showing the rotating body of FIG. 4; FIG. 6 is a cross-sectional view showing a stator body of the power generator according to the present invention; FIG. 7 is a front view showing the stator body of FIG. 4; FIG. 8 is a circuit diagram of an example of a power generator according to the present invention; and FIG. 9 is a cross-sectional view showing a power generator according to another embodiment of the present invention .

BEST MODE FOR CARRYING OUT THE INVENTION Now, power generators according to preferred embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing a power generator according to a preferred embodiment of the present invention; FIG. 2 is a cross-sectional view showing the power generator taken along a line A-A of FIG. 1; and FIG. 3 is a front view showing the power generator of FIG. 1. Referring to FIGS. 1 to 3, the power generator comprises a stator body where stator magnets are disposed and a rotating body where first and second rotating magnets are disposed. The rotating body rotates about a rotating shaft. Firstly, a stator body and a rotating body of the power generator will be described, and then, the overall structure of the power generator will be described. FIG. 4 is a cross-sectional view showing the rotating body of the power generator according to the present invention. FIG. 5 is a front view showing the, rotating body of FIG. 4. Referring to FIGS. 4 and 5, the rotating body of the power generator comprises a rotating shaft 100, a first rotating disk 110, a second rotating disk 120, at least one first rotating magnet 130 disposed along each circumference of the first and second rotating disks 110 and 120, a rotor 140 disposed between the first and second rotating disks 110 and 120, and at least one second rotating magnet 150 disposed on a circumferential surfaced of the rotor 140. Now, the components of the rotating body will be described in detail. Firstly, the rotating shaft 100 is disposed to extend along a center of the stator body. As shown in the figure, the first and second rotating disks 110 and 120 have a shape of disk. The first and second rotating disks 110 and 120 are fixed at respective ends of the rotating shaft 100. The first and second rotating disks 110 and 120 rotate together with the rotating shaft 100. The first rotating magnets 130 are disposed along each circumference of the first and second rotating disks 110 and 120. Adjacent ones of the first rotating magnets 130 are separated from each other by a predetermined distance. The numbers of the first rotating magnets 130 disposed on the first and second rotating disks 110 and 120 are preferably equal to each other . The rotor 140 has a shape of cylinder. The rotor 140 is fixed at the rotating shaft 100. The rotor 140 is disposed between the first and second rotating disks 110 and 120. At least one second rotating magnet 150 is disposed on a circumferential surface of the rotor 140. The second rotating magnets 150 are permanent magnets. Adjacent ones of the second rotating magnets 150 are separated uniformly from each other by a predetermined distance. The predetermined distance is preferably about 1 to 1.5 times width of the second rotating magnet 150. By separating the second rotating magnets by the predetermined distance, it is possible to reduce load of the rotating body during the rotation thereof. In addition, adjacent ones of the second rotating magnets 150 preferably have opposite poles. On the other hand, the number of the second rotating magnets 150 is preferably equal to the number of the first rotating magnets 130 disposed on the first rotating disk 110. In addition, it is preferably that the first rotating magnets 130 and the corresponding second rotating magnets 150 are disposed on respective radial lines extending from the rotating shaft 100. Particularly, it is preferably that if the number of first rotating magnets 130 (or second rotating magnets 150) is odd, the number of stator magnets is even; and if not, the number of stator magnets is odd. In addition, it is empirically observed that the load is most greatly reduced in a case where the number of first rotating magnets 130 (or second rotating magnets 150) is even and the number of stator magnets is odd. Like this, since they are fixed at a single shaft, that is, the rotating shaft 100, the first and second rotating disks 110 and 120 and the rotor 140 simultaneously rotate during the rotation of the rotating shaft 100. Now, the stator body of ^• the power generator according to the present invention will be described in detail with reference to FIGS. 6 and 7. FIG. 6 is a cross-sectional view showing a stator body of the power generator according to the present invention. FIG. 7 is a front view showing the stator body of FIG. 4. As shown in FIGS. 6 and 7, the stator body of the power generator comprises a first stator disk 200, a second stator disk 210, at least one stator magnet 220 disposed along each circumference of the first and second stator disks 200 and 210, at least one magnetic induction iron core 240 disposed between the first and second stator disks 200 and 210, and coils 230 wound around the magnetic induction iron cores 240. Now, the components of the stator body will be described in detail. As shown in the figure, the first and second stator disks 200 and 210 have a shape of disk. The centers of the first and second stator disks 200 and 210 are engaged with the rotating shaft 100 of the rotating body. When the rotating shaft 100 rotates, the first and second stator disks 200 and 210 do not rotate. On the other hand, at the least stator magnet 220 is disposed along each circumference of the first and second stator disks 200 and 210. Adjacent ones of the stator magnets 220 are preferably separated uniformly from each other by a predetermined distance. At least one magnetic induction iron core 240 having a predetermined length is disposed between the first and second stator disks 200 and 210. Coils 230 are wound around the respective magnetic induction iron cores 240. In addition, it is preferable that the magnetic induction iron cores 240 constitute a plurality of sets in which an even number of the magnetic induction iron cores 240 is included. Adjacent sets of the magnetic induction iron cores 240 are preferably separated from each other by a predetermined distance of over 0.5 times the width of the magnetic induction iron cores . The number of sets of the magnetic induction iron cores 240 is preferably equal to the number of the stator magnets 220. The sets of magnetic induction iron cores 240 and the corresponding stator magnets 220 are preferably disposed on respective radial lines extending from the rotating shaft 100. Now, an overall structure of the power generator where the aforementioned stator body and rotating body are assembled will be described with reference to FIGS. 2 and 3. As shown in FIGS. 2 and 3, preferably, the first stator disk 200 of the stator body is disposed outside the first rotating disk 110 of the rotating body; and the second stator disk 210 of the stator body is disposed outside the second rotating disk 120 of the rotating body. In addition, diameters of the first and second stator disks 200 and 210 of the stator body are preferably larger than those of the first and second rotating disks 110 and 120 of the rotating body. As a result, the stator magnets 220 disposed along each circumference of the first and second stator disks 200 and 210 of the stator body are located beyond the first rotating magnets 130 disposed along each circumference of the first and second rotating disks 110 and 120 of the rotating body. The magnetic induction iron cores 240 of the stator body are preferably separated by a predetermined distance from the rotor 140 of the rotating body. The magnetic induction iron cores 240 surround the rotor 140. As described above, since the adjacent sets of the magnetic induction iron cores 240 are separated from each other by a predetermined distance, the matching points between the second rotating magnets 150 and the magnetic induction iron cores 240 cannot be generated when the second rotating magnets 150 of the rotating body rotate. As a result, the load can be greatly reduced. FIG. 9 is a cross-sectional view showing another embodiment of a power generator according to the present invention. As shown in FIG. 9, the preferably, first and second stator disks 900 of a stator body are disposed inside first and rotating disks 910 of a rotating body, respectively. In addition, diameters of the first and second stator disks 910 are preferably equal to diameters of the first and second rotating disks 910. In addition, stator magnets 920 disposed along each circumference of the first and second stator disks 900 are preferably disposed to face respective first and second rotating magnets 930 disposed along respective circumferences of the first and second rotating disks 910. While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention. For example, a distance between stator magnets, a distance between first rotating magnets, shapes thereof, and shapes of first and second stator disks may be modified in various manners in order to improve power generation efficiency of a power generator. The exemplary embodiments should be considered in descriptive sense only and not for purposes of limitation. Therefore, the scope of the invention is defined not by the detailed description of the invention but by the appended claims, and all differences within the scope will be construed as being included in the present invention.

INDUSTRIAL APPLICABILITY As shown in FIG. 8, an output power is measured by detecting DC voltages output from rectifiers 300 connected across two terminals of respective coils of the power generator. The measured output power is about 90% of an input power of the power generator. According to the present invention, it is possible to improve power generation efficiency of a power generator by changing structure and arrangement of a stator body and a rotating body thereof. In addition, a power generator according to the present invention can be adapted to all the fields where a convention power generator is adapted.

Claims

CLAIMS 1. A power generator having a stator body and a rotating body, wherein the stator body comprises: a first stator disk; a second stator disk separated by a predetermined distance from the first stator disk; at least one stator magnet disposed along each circumference of the first and second stator disks; at least one magnetic induction iron core connecting the first stator disk with the second stator disk; and coils wound around the magnetic induction iron cores, and wherein the rotating body comprises : a rotating shaft passing through centers of the first and second stator disks; a first rotating disk fixed at one end of the rotating shaft, thereby rotating together with the rotating shaft; a second rotating disk fixed at the other end of the rotating shaft; at least one first rotating magnet disposed along each circumference of the first and second rotating disks; a rotor having a shape of cylinder, the rotor being fixed at the rotating shaft, the rotor disposed between the first and second rotating disks; and at least one second rotating magnets disposed on a circumferential surface of the rotor.

2. The power generator according to claim 1, wherein diameters of the first and second stator disks of the stator body are larger than those of the first and second rotating disks of the rotating body, and wherein the first and second rotating disks are disposed outside the first and second stator disks, respectively .

3. The power generator according to claim 1, wherein the magnetic induction iron cores are disposed to surround the rotor of the rotating body.

4. The power generator according to claim 1, wherein the number of the stator magnets of the stator body is equal to the number of magnetic induction iron cores, and wherein the stator magnets and the corresponding ^• magnetic induction iron cores are disposed on respective radial lines extending from a center of the first stator disk.

5. The power generator according to claim 1, wherein adjacent stator magnets are separated from each other by a predetermined distance, and wherein adjacent magnetic induction iron cores are separated from each other by a predetermined distance.

6. The power generator according to claim 1, wherein adjacent first rotating magnets are separated from each other by a predetermined distance, and wherein adjacent second rotating magnets are separated from each other by a predetermined distance.

7. The power generator according to claim 1, wherein the number of the first rotating magnets disposed along the circumference of the first rotating disk is equal to the number of the second rotating magnets, and wherein the first rotating magnets and the corresponding second rotating magnets are disposed on respective radial lines extending from the rotating shaft.

8. The power generator according to claim 1, wherein the magnetic induction iron cores constitutes a plurality of sets in which an even number of the magnetic induction iron cores is included.

9. The power generator according to claim 1, wherein the number of the stator magnets is odd, and wherein the number of the first or second rotating magnet is even.