JP5960068B2 - Rotating electrical machine system - Google Patents

Description

  The present invention relates to a rotating electrical machine system in which rotating shafts of a plurality of rotating electrical machines are connected.

  In a conventional ordinary rotating electrical machine, designing is performed by changing the size of each part in accordance with the required output size. It is also conceivable to arrange a plurality of rotating electric machines and match the total output of these rotating electric machines with the required output.

  On the other hand, as described in Patent Document 1, a transverse magnetic flux type permanent magnet synchronous machine is known, but is still in the development stage.

JP 2010-213509 A

  In a conventional ordinary rotating electrical machine, the stator coil extends in the direction of the rotation axis at a position facing the rotor, and coil ends are formed at both ends in the axial direction. For this reason, when trying to arrange a plurality of conventional ordinary rotating electric machines side by side in the axial direction, it is necessary to arrange the coil ends within a range in which the coil ends do not interfere with each other, and it has been impossible to arrange them densely in the axial direction.

  The present invention has been made in view of the above circumstances, and it is possible to arrange a plurality of rotating electric machines and to adjust the total output of those rotating electric machines to a required output size, and to be a compact rotating electric machine The purpose is to provide a system.

In order to achieve the above object, the present invention provides a rotating electrical machine system in which rotors of a plurality of rotating electrical machines arranged in an axial direction are connected to each other, and each of the plurality of rotating electrical machines is rotatably supported. A rotor made of a magnetic material, a permanent magnet fixed to the rotor and rotatable together with the rotor, a stator core that is fixedly supported and forms a magnetic path with the rotor, and an inner side of the stator core a coil fixedly supported by winding around, was closed, the said rotor of the plurality of rotating electrical machines are being formed integrally, each of the permanent magnets of said plurality of rotating electrical machine, with respect to the rotor It is connected detachably .

  According to the present invention, it is possible to arrange a plurality of rotating electrical machines, and to adjust the total output of these rotating electrical machines to a required output level, and to provide a compact rotating electrical machine system.

1 is a schematic longitudinal sectional view of a first embodiment of a rotating electrical machine system according to the present invention. It is a typical perspective view which shows the structure of the one rotary electric machine which comprises the rotary electric machine system shown in FIG. FIG. 3 is a cross-sectional view taken along the line III-III of the rotating electrical machine shown in FIG. 2. 3 is a cross-sectional view taken along line III-III in FIG. 2 showing a state in which the rotor is rotated 90 degrees in the rotating electrical machine shown in FIGS. 2 and 3. It is a typical longitudinal cross-sectional view of 2nd Embodiment of the rotary electric machine system which concerns on this invention.

  Embodiments of a rotating electrical machine system according to the present invention will be described below with reference to the drawings. Here, the same or similar parts are denoted by common reference numerals, and redundant description is omitted.

[First Embodiment]
FIG. 1 is a schematic longitudinal sectional view of a first embodiment of a rotating electrical machine system according to the present invention. FIG. 2 is a schematic perspective view showing the configuration of one rotating electrical machine that constitutes the rotating electrical machine system shown in FIG. 1. 3 is a cross-sectional view of the rotating electrical machine shown in FIG. 2 taken along line III-III. 4 is a cross-sectional view taken along the line III-III in FIG. 2 showing a state in which the rotor is rotated 90 degrees in the rotating electrical machine shown in FIGS. 2 and 3.

  In the rotating electrical machine system of this embodiment, a plurality of transverse magnetic flux type permanent magnet synchronous rotating electrical machines (hereinafter also simply referred to as “rotating electrical machines”) 10 are arranged in the axial direction and their rotors 11 are coupled to each other. The rotating electrical machine 10 can operate as both a generator and an electric motor. Here, the configuration and operation as a generator will be mainly described.

  First, the configuration and operating principle of the transverse magnetic flux type permanent magnet synchronous rotating electric machine 10 will be described with reference to FIGS. The illustrated example is a one-phase, four-pole example. Permanent magnets 12 and 13 are fixed to both ends of a rotor 11 made of a magnetic material. The permanent magnets 12 and 13 are alternately arranged with N and S poles every 90 degrees in the circumferential direction. The two permanent magnets 12 and 13 are arranged so that opposite poles face each other in the axial direction.

  Two stator cores 14 are fixedly supported at positions facing the permanent magnets 12 and 13 radially outward. Each stator core 14 extends from the radially outer side of the two permanent magnets 12, 13 toward the permanent magnets 12, 13, and faces the permanent magnets 12, 13 with a gap therebetween, It consists of the axial direction connection part 16 which connects the magnet opposing parts 15 to the rotation axis direction. The two stator cores 14 are arranged on the opposite side across the rotor 11.

  A coil 17 is wound inside the axial connecting portion 16 at a position between the two permanent magnets 12 and 13 around the rotor 11. A power line 20 is connected to the coil 17.

  When the rotor 11 is rotated by an unillustrated prime mover or the like, the permanent magnets 12 and 13 are rotated to change the position of the magnetic poles. Accordingly, the magnetic flux is changed from the direction of the arrow 18 shown in FIG. 3 to the arrow shown in FIG. The direction changes to 19 and an induced electromotive force is generated in the coil 17. As a result, a sinusoidal induced electromotive force is generated in the coil 17. Electric power is supplied to the outside through the power line 20 by the induced electromotive force generated in the coil 17.

  The direction of the current in the coil 17 in the state of FIG. 3 is the direction from the back to the front as shown by the arrow 20a on the left side, and from the front to the back as shown by the arrow 20b on the right. The direction of the current in the coil 17 in the state of FIG. 4 is the direction from the front to the back of the paper as indicated by the arrow 21a on the left side and the direction from the back to the front of the paper as indicated by the arrow 21b on the right side.

  In the rotating electrical machine system of the first embodiment, as shown in FIG. 1, a plurality (three in the illustrated example) of rotating electrical machines 10 are arranged side by side in the axial direction, and each rotor 11 is connected by a flange 30. Yes. That is, the flange 30 is attached to each rotor 11, and adjacent flanges 30 are detachably connected by bolts and nuts (not shown).

  By combining a plurality of rotating electrical machines 10 in this way, the total power induced in the coil 17 can be matched with the power required for design. In this case, standardization can be promoted by simply combining the required number of rotating electrical machines 10 as compared with the case where the design of each rotating electrical machine 10 is changed in accordance with the power required for the design, thereby reducing the cost. And increased reliability.

  Further, by shifting the phases of the plurality of rotating electrical machines 10 at equal intervals, a multi-phase rotating electrical machine system can be obtained. For example, the phase can be shifted by 120 degrees to form a three-phase rotating electric machine.

  Further, the three rotating electric machines 10 can be combined into a three-phase rotating electric machine, and a plurality of sets can be combined to form a required three-phase rotating electric machine.

[Second Embodiment]
FIG. 5 is a schematic longitudinal sectional view of a second embodiment of the rotating electrical machine system according to the present invention. This embodiment is a modification of the first embodiment. One rotor 11 is commonly used for a plurality of rotating electrical machines 10, and permanent magnets 12 and 13 of each rotating electrical machine 10 are attached to and detached from the rotor 11. It is fixed as possible.

  According to this embodiment, the length of the rotor 11 varies depending on the number of rotating electrical machines 10 to be combined, but the other parts can be of a common specification regardless of the number of rotating electrical machines 10. As a result, similarly to the first embodiment, a low-cost and highly reliable rotating electrical machine system can be realized in accordance with a required output. In addition, the weight can be reduced and the cost can be reduced as compared with the connection by the flange.

[Other Embodiments]
Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

  In the above description, the rotary electric machine 10 is mainly described as a generator, but the rotary electric machine 10 may be an electric motor. In the case of an electric motor, the rotor 11 is rotated by supplying an AC current to the coil 17 from an AC power source (not shown).

10 ... Transverse magnetic permanent magnet synchronous rotating electric machine (rotating electric machine)
DESCRIPTION OF SYMBOLS 11 ... Rotor 12, 13 ... Permanent magnet 14 ... Stator core 15 ... Magnet opposing part 16 ... Axial direction connection part 17 ... Coil 20 ... Power line 30 ... Flange

Claims (3)

A rotating electrical machine system in which rotors of a plurality of rotating electrical machines arranged in the axial direction are connected to each other,
Each of the plurality of rotating electrical machines
A rotor made of a magnetic material that is rotatably supported;
A permanent magnet fixed to the rotor and rotatable with the rotor;
A stator core that is fixedly supported and forms a magnetic path with the rotor;
A coil wound around and fixedly supported around the rotor inside the stator core;
I have a,
The rotors of the plurality of rotating electrical machines are integrally formed;
Each of the permanent magnets of the plurality of rotating electrical machines is detachably coupled to the rotor . Each of the plurality of rotating electrical machines is a single-phase rotating electrical machine, and the rotors of at least three of the plurality of rotating electrical machines are connected to form a plurality of phases whose phases are shifted at equal intervals. The rotating electrical machine system according to claim 1, wherein: The rotating electrical machine system according to claim 2 , wherein the plurality of rotating electrical machines corresponding to the plurality of phases are set as a set, and the rotors of the plurality of sets of rotating electrical machines can be connected according to a required output .

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