JP2017163813A - Inner rotor type disc power generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disc power generator suitable for small-scale power generation such as a small hydroelectric power generation, which is an inner rotor type capable of efficient power generation even by a low rotation, and has a plate structure with which a plurality of power generators can be connected easily.SOLUTION: An inner rotor type disc power generator in a disc type comprises in a power generating section: a rotor arranged in a center of the power generator and connected to a rotation axis; and stators arranged with a certain interval at both sides of the rotor as if the rotor is clamped by the stators. The rotor has permanent magnets at equal intervals on both side faces of annulus ring thereof. The stators have power generating coils on an annulus ring thereof at equal intervals, and are fixed on side plates making an outer wall of the power generator. The inner rotor rotates so as to perform power generation. The permanent magnets included by the rotor are arranged in a front face of the annulus ring of the rotor with pitches and in a rear face with the pitches deviated by half pitch, thereby reducing cogging torque and enabling smooth rotation from the start.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an inner rotor type disk generator that can efficiently generate power even at low rotation and can be easily connected in the field of power generation utilizing hydropower, wind power, wave power, and the like.

  In recent years, as a renewable energy that is environmentally friendly without destroying nature, small hydroelectric power generation that generates small-scale power generation using various familiar water resources (water streams) such as small and medium-sized rivers, river weirs, and irrigation canals has attracted attention. Has been. For example, Patent Document 1 discloses a technique related to a small hydroelectric power generation system that generates power using a water flow in a cooling water discharge channel of a hydroelectric power plant or the like. However, a generator used for this small hydropower generation is used by connecting a conventional generator such as an alternator, a dynamo or a cylindrical rotary alternator to a water turbine or the like. In response to this situation, a disk-type generator with an inner rotor capable of efficiently generating power from a low-speed water turbine using a low-speed water turbine using a familiar water resource (water flow) is provided.

As such an electromagnetic generator, one using a reciprocating movement between a permanent magnet and a coil (Japanese Patent Laid-Open No. 2010-115076), or a cylindrical type instead of a disk type (Japanese Patent Laid-Open No. 2010-98945, Japanese Patent Laid-Open No. 2009-95151).
JP 2010-115076 A JP 2010-98945 A JP 2009-95151 A JP 2008-245381 A JP 2005-218263 A

  In small hydropower generation using river flow, river weirs, etc., it is necessary to generate power at a limited flow rate and flow velocity. In response to this problem, conventional cylindrical AC generators need to increase the speed significantly in order to rotate at high speeds, or increase the number of poles to generate power and generate power efficiently. Is difficult.

  In addition, when connecting a generator and a speed increaser or generators to increase the amount of power generation, the installation space increases, the entire device becomes larger and complicated, and the installation is easier. Convenience is impaired.

  In response to the above problems, the generator according to the present invention is an inner rotor type capable of performing efficient power generation at low rotation, and can easily connect a plurality of generators and speed increasers by adopting a flat plate structure. An object is to provide an inner rotor type disk generator.

  The main part for generating power of the generator according to the present invention is arranged so as to sandwich the rotor with a certain gap on both sides of the rotor, which is arranged in the central part of the generator and connected to the rotating shaft. This is a disk type inner rotor type disk generator composed of a stator.

  A feature of such a generator is an annular ring formed by winding electromagnetic steel strips on both sides of a rotor with permanent magnets arranged at equal intervals on both sides of a ring made of a material having high permeability such as steel ( It is to have a structure in which a stator in which power generation coils 11 made by winding a flat copper wire on the side surface of a wound core 10 are arranged at equal intervals and arranged concentrically with a certain gap therebetween.

  In such a generator, the generator side surface of the generator that holds the rotating shaft of the stator and the rotor has a flat end structure so that a plurality of generators and speed increasers can be directly connected and expanded. Yes.

  In such a generator, the rotor has permanent magnets such as circular neodymium magnets arranged on both sides of the ring.

  The ring that forms the rotor is made of a material having high magnetic permeability such as steel.

  The permanent magnets constituting the rotor are arranged at equal pitches on both side surfaces of the ring, and on one side, an even number of N poles and S poles are alternately arranged. Moreover, it arrange | positions so that arrangement | positioning pitch may shift | deviate by a half pitch on the front surface and a back surface.

  In such a generator, the stator has the power generating coil 11 arranged at an equal pitch on one side of the ring, and concentrically arranged on both sides of the rotor so that the power generating coil 11 and the permanent magnet 13 face each other.

  A ring (rolled iron core) 10 constituting the stator is formed in a ring shape by winding a thin electromagnetic steel strip.

  The power generating coil 11 constituting the stator is made by winding a flat copper wire or the like, arranged on one side of the ring at multiples of 3 at an equal pitch, and the coils are connected by star connection. As a result, a three-phase AC voltage is output. Then, it can be converted into direct current through a rectifier circuit.

  According to the present invention, the cogging torque can be reduced and the engine can be rotated smoothly from the start. In small hydropower generation using a river flow, a river weir, etc. Power generation is possible.

  Since the side surface of the casing is flat with a disk type, a plurality of generators can be directly connected in series to increase the amount of power generation, and the entire apparatus can be miniaturized. Furthermore, the entire apparatus can be reduced in weight, and can be easily carried and installed.

It is a perspective view of the main components of the generator concerning the embodiment of the present invention. It is a perspective view of the principal part of the rotor in the generator. It is a schematic diagram of the stator in the generator. (A) It is a schematic diagram which shows formation of the closed magnetic circuit in the generator. (B) It is a schematic diagram which shows the N pole and S pole of a permanent magnet. It is a perspective view of the generator which concerns on embodiment of this invention. It is a perspective view of the stator part which concerns on embodiment of this invention. It is a perspective view of the rotor part which concerns on embodiment of this invention. It is a schematic diagram which shows the star connection which concerns on embodiment of this invention.

  A first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view illustrating a configuration of a main part that generates power in the generator according to the first embodiment. The main part of the generator 1 has a certain gap on both sides of the rotor 1 in which permanent magnets 13 are arranged at equal intervals on both sides of a rotor ring 12 made of a material having high permeability such as steel. Then, stators 2a and 2b in which power generating coils 11 made by winding a flat copper wire on the side surface of a stator ring (winding iron core) 10 wound around an electromagnetic steel strip into a ring shape are arranged at equal intervals. ing.

  FIG. 2 is a perspective view of a main part of the rotor 1 in the generator. The permanent magnets 13 constituting the rotor 1 are arranged at equal intervals on both side surfaces of the rotor ring 12, and on one side, an even number of N magnets and S poles are arranged alternately. Further, the arrangement pitch is arranged so that the arrangement pitch is shifted by a half pitch between the front surface and the back surface.

  FIG. 3 is a schematic diagram of the stator 2a in the generator. The stator ring 10a constituting the stator 2a is formed in a ring shape by winding a thin electromagnetic steel strip, and the power generation coils 11a and 11b are formed by winding a flat copper wire or the like. Multiples of 3 are arranged on one side of the ring 10a at an equal pitch, and the coils are connected by star connection (Y connection).

  FIG. 4 is a schematic diagram showing the formation of a closed magnetic circuit in the generator. In the first embodiment, the permanent magnet 13 adjacent to a part of the rotor ring 12 of the rotor 1 and the stator rings 10a and 10b of the stators 2a and 2b and the power generation coils 11a and 11b adjacent to each other. A closed magnetic circuit is formed. By rotating the rotor, this closed magnetic path changes, and it becomes possible to generate electric power according to the right hand rule of framing.

  A three-phase AC output voltage can be obtained by star-connecting every three power generating coils 11. Further, the permanent magnets 13 constituting the rotor 1 are arranged so that the arrangement pitch is shifted by a half pitch between the front surface and the back surface of the rotor ring 12, thereby reducing the cogging torque and rotating smoothly from the start. Can do.

  A second embodiment of the present invention will be described with reference to the drawings. FIG. 5 is a schematic diagram showing an example of the appearance of the generator. The side plates 14 a and 14 b can play a role of holding the stators 2 a and 2 b and holding bearings for supporting the rotating shaft 16 connected to the rotor 1. On the other hand, the outer wall surfaces of the side plates 14a and 14b are flat. This makes it possible to directly connect a plurality of generators.

  FIG. 6 shows an embodiment in which a stator ring 10b, a power generation coil 11b, and a bearing housing 15b constituting the stator 2b are attached to the side plate 14b. The outer contours of the side plates 14a and 14b can be any shape.

  FIG. 7 shows an embodiment in which a rotating shaft 16 is attached to the rotor 1. The rotary shaft 16 can have an arbitrary shape, but by making the overall length shorter than the distance between the outer walls of the left and right side plates, it is easy to directly connect a plurality of generators.

1 Rotor, 2a, 2b Stator, 10a, 10b Stator ring (winding iron core),
11a, 11b power generation coil, 12 rotor ring, 13 permanent magnet,
14a, 14b Side plate, 15a, 15b Bearing housing, 16 Rotating shaft,
17 prop

Claims (4)

  In an inner rotor type disk generator, a rotor ring made by winding a magnetic steel strip into a ring shape, and a plurality of permanent magnets on both sides of the rotor ring are alternately arranged with N poles and S phases. A stator ring formed by winding a magnetic steel strip into a ring shape, a stator having a plurality of power generation coils arranged at equal intervals on one side of the stator ring, and the rotation An inner rotor type disk generator having a structure in which two stators are arranged so that the power generating coils of the stator face the permanent magnet of the rotor at equal intervals on both sides of a child.   2. The inner rotor type disk generator according to claim 1, wherein the casing side surface of the generator is a flat surface.   2. The inner rotor type disk generator according to claim 1, wherein an interval between the permanent magnets arranged in the rotor ring is arranged so as to be shifted by a half pitch between one surface and the other surface. Type disk generator.   2. An inner rotor type disk generator according to claim 1, wherein a plurality of power generating coils are arranged in multiples of 3 and an output is obtained by star connection.