JPH11196558A - Stator coil of rotating machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator coil of a rotating machine which can improve generation efficiency or rotating torque of the rotating machine. SOLUTION: A holder 13 is attached to a rotary shaft 12 supported by a housing 11. A plurality of permanent magnets 15 are attached to the holder 13 so as to have different poles disposed alternately in the circumferential direction to compose a rotor. A stator coil consisting of a plurality of whirlpool coils 18 is attached to the housing 11 with a holder 17 therebetween so as to have the whirlpool surfaces disposed against the poles of the permanent magnets 15 of the rotor. Wires of which the whirlpool coils 18 are composed are wound in the whirlpool shapes in the center parts of the respective whirlpool coils 18 so as to fill and eliminate cavities.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stator coil in a rotating electric machine such as a generator or a motor.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication No. Hei 10-23697 proposes a rotating electric machine such as a generator or a motor. This rotating electric machine is composed of a rotor provided with a plurality of permanent magnets so that different poles alternately appear in a circumferential direction, and a stator provided with a plurality of spiral coils opposed to the magnetic poles of the rotor. I have. Each of the six coils constituting the stator coil is formed in a spiral shape, and each spiral coil has a hollow center.

When the stator coil is disposed at a predetermined position in a housing and the rotor is rotated, electric power is generated in each spiral coil of the stator coil by an electromagnetic induction action. Conversely, when an AC voltage is applied to a plurality of terminals of the stator coil, the rotor is rotated.

A conventional axial brushless motor disclosed in Japanese Patent Application Laid-Open No. 9-168270 has been proposed. The spiral coil constituting the stator coil of this electric motor is a rectangular coil formed by spirally winding a strip-shaped rectangular conductor, and a cavity is formed at the center of each coil. When a voltage is applied to each of the rectangular coils, the rotor having the permanent magnet is rotated by the repulsive force of the magnetic pole.

[0005]

However, in the above two rotating electric machines, since a hollow portion is formed at the center of each coil of the stator coil, a high output voltage cannot be obtained in the generator. There was a problem. In addition, there is a problem that a high output torque cannot be obtained with an electric motor. In the case of an electric motor, if a hollow portion is formed in the center of a spiral coil, the strength (Gauss) of a magnetic field induced when a predetermined voltage and current is applied to the stator coil is almost the same in the hollow portion. Therefore, a high output torque of the rotor cannot be obtained.

On the other hand, in the case of a stator coil using a rectangular coil, the rectangular coil is joined to the front and rear two layers, and the ends of the conductive wires are connected to each other at the center thereof. Although it is not necessary to derive the lead wire from the center as in the above, there is a problem that the structure is complicated, the number of parts is increased, and the production is troublesome. Particularly, in a structure in which only one rectangular coil is interposed in a gap between a pair of rotors having a permanent magnet, a structure for properly leading out a lead wire from the center of the coil has not been proposed yet.

A first object of the present invention is to provide a stator coil in a rotating electric machine which can improve the power generation efficiency or output torque efficiency of the rotating electric machine by solving the above-mentioned problems in the prior art. is there.

A second object of the present invention is to provide, in addition to the first object, a stator coil of a rotating electric machine which can properly lead out a lead wire from a coil center when a rectangular coil is used. It is in.

[0009]

In order to achieve the above object, according to the first aspect of the present invention, a holder is provided on a rotating shaft supported by a housing, and a different pole is provided in the circumferential direction with respect to the holder. A rotor provided with a plurality of permanent magnets so as to appear alternately, and a stator coil formed of a plurality of spiral coils supported so that a spiral surface faces a magnetic pole of the permanent magnet of the rotor via a holder with respect to a housing. In a rotating electric machine such as a generator or an electric motor, a conductor forming the coil is spirally wound around the center of each spiral coil of the stator coil with almost no gap.

According to a second aspect of the present invention, in the first aspect, the rotor is disposed at a plurality of locations at predetermined intervals in an axial direction or a radial direction of a rotating shaft, and the stator coil is provided between the opposed rotors. Intervened.

According to a third aspect of the present invention, in the first or second aspect, the spiral coil is a rectangular coil formed by spirally winding a belt-shaped rectangular conductor. Claim 4
According to the third aspect of the present invention, a groove is formed on one side surface of the rectangular coil from the center to the outer peripheral surface in the third aspect, and the groove accommodates a lead wire connected to the end of the conductor at the center of the rectangular coil. Has been derived outside.

According to the fifth aspect of the present invention, the first to fourth aspects are provided.
In any one of the above, a shielding plate for shielding magnetic flux of a permanent magnet is provided outside a holder constituting the rotor.

According to a sixth aspect of the present invention, in the first aspect, the rotary electric machine is an electric motor, and each of the spiral coils constituting the stator coil is disposed at substantially equal pitches at six locations in the circumferential direction. Of the first to sixth spiral coils,
Lead wires derived from the ends of the conductors at the center of the first to third spiral coils are connected to three terminals U, V, W of the three-phase AC power supply.
And the leads connected to the ends of the conductors at the outer periphery of the first to third coils are respectively connected to the leads connected to the ends of the conductors at the center of the fourth to sixth spiral coils. Lead wires that are connected and connected to the ends of the conductor wires on the outer periphery of the fourth to sixth coils are connected to terminals X, Y, and Z, respectively.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, first and second basic structures of a generator to which a stator coil according to the present invention is applied will be described with reference to FIGS.

FIG. 1 shows a first basic structure. A rotating shaft 12 is supported on a housing 11 so as to be rotatable by external power. First and second disc-shaped rotating holders 13 and 14 are fixed to the rotating shaft 12 at predetermined intervals in the axial direction of the shaft 12 so as to be located in the housing 11. Also, the first and second rotating holders 13,
A plurality of first permanent magnets 15 and second permanent magnets 16 are fitted and fixed to the respective members 14, 14, 14, 15, 1.
6 constitutes a rotor. The plurality of first permanent magnets 15 are arranged in the circumferential direction of the rotating holder 13, that is, the rotating shaft 1.
It is fitted and fixed at a plurality of locations at equal intervals on the same circular locus about the center of the two axes. Similarly, a plurality of second permanent magnets 1
6 are also provided at equal intervals in the circumferential direction.

A fixed holder 17 is mounted on the inner peripheral surface of the housing 11 so as to be located between the first and second rotating holders 13 and 14, and a plurality of coreless coils 18 are mounted on the fixed holder 17 in a circumferential direction. In the direction, that is, at equal intervals on the same circular locus about the axis of the rotating shaft 12, the members 17, 18 to 18 constitute a stator coil.

The polarity of the pair of permanent magnets 15 and 16 facing each other across the coreless coil 18 is N
The poles are different from the S pole or the S pole and the N pole. Further, the polarities of the plurality of permanent magnets 15 having different phases on the same circular locus of the rotary holder 13 are reversed one by one or a plurality thereof. The polarities of the plurality of permanent magnets 16 having different phases on the same circular locus of the rotary holder 14 are also reversed one by one or a plurality of them.

In FIG. 1, when the rotating shaft 12 is rotated,
The first and second permanent magnets 15, 16 are synchronously rotated via the first and second rotary holders 13, 14. Then
When the magnetic flux (magnetic field strength) of the permanent magnets 15 and 16 crosses the plurality of coils 18 arranged at predetermined positions, current flows through the coreless coil 18, and electric power is extracted from a lead wire (not shown) connected to the coil 18. .

The second basic structure shown in FIG.
The first rotary holder 12 and the second rotary holder 13 having a cylindrical shape are mounted so as to be synchronously rotatable at predetermined intervals in the radial direction, and are supported by the fixed holder 17 between the first and second permanent magnets 15 and 16. A plurality of coreless coils 18 are arranged. Also in this second basic structure, the rotating shaft 12
Is rotated, the permanent magnets 15 and 16 are rotated by the rotary holders 13 and 14, and the plurality of coreless coils 1 and 16 are rotated.
Power is taken from 8. The plurality of permanent magnets 1
The polarities of the magnets 5 and 16 are the same as those of the permanent magnets 15 and 16 of the first basic structure.
Is set in the same way as

In the two basic structures described above, since the coil 18 has no core and is spirally wound up to the center of the coil, the permanent magnets 15 and 16 are moved closer to and away from the iron core. Therefore, the torque at the time of starting and the torque at the time of normal operation can be reduced without receiving the braking force by the magnetic force. In addition, the decrease in power generation efficiency due to iron loss due to the core is reduced, and the magnetic flux of the pair of permanent magnets 15 and 16 crosses the coreless coil 18 so that the power generation efficiency can be increased.

The first and second basic structures of the generator are also the basic structures of an electric motor. When a two-phase or three-phase AC voltage is applied to the coil 18, the rotating shaft 12 is rotated. Next, a first embodiment of a stator coil of a generator using the first basic structure will be described with reference to FIGS.

3 and 4, reference numeral 20 denotes a support member as a housing. The support member 20 is provided with a left support plate 21, a right support plate 22, and both support plates 21 and 22 at predetermined intervals. A plurality of (four in this embodiment) connecting bolts 23 are connected to each other. The left and right ends of each connection bolt 23 are provided with holes 21 in support plates 21 and 22.
The nuts 231 threaded to the bolts 23 are integrally connected to the support plates 21 and 22 while penetrating the support plates 21 and 221.

Further, as shown in FIG.
Holes 212 and 222 are provided at the center portions of the support plates 21 and 22 of FIG.
The rotation shaft 24 is provided in the holes 212 and 222 as shown in FIG.
As shown in (1), it is rotatably supported at a predetermined position by a pair of bearings 25 and 26. Disc-shaped first to third rotating holders 27, 28, and 2 made of an insulating material (for example, a synthetic resin material such as an epoxy resin) are provided at an intermediate portion of the rotating shaft 24.
9 are connected and fixed at predetermined intervals in the axial direction by connecting fittings 30. The connecting fitting 30 includes a boss 301 fitted and fixed to the rotating shaft 24 and a flange 302 formed integrally with the boss 301 and bolted to the rotating holders 27 to 29. In this embodiment, the connection fitting 30 for the second rotary holder 28 is not shown.

First to third permanent magnets 31, 32 and 33 are respectively fitted and fixed to the first to third rotary holders 27 to 29 at a plurality of positions, and the members 27 to 29 and 31 to 33 are respectively provided.
Constitute three rotors. Each rotating holder 2
The number of each of the permanent magnets 31 to 33 of 7 to 29 is 18
, And a total of 54 rotary holders are used.
A first magnetic flux shielding plate 34 is provided on the left side surface of the first rotary holder 27.
However, a second magnetic flux shielding plate 35 is adhesively fixed to the right side surface of the third rotating holder 29.

The first to third permanent magnets 31 to 33 gripped by the first to third rotary holders 27 to 29 are formed in a horizontal columnar shape as shown in FIG. Axis 2
The magnetic pole is N-pole every three on the same circular locus centered on 41,
It is alternately inverted with the S pole. Further, the opposing surface of the second permanent magnet 32 which is located on the same axis as the first permanent magnet 31 and is opposed to the first permanent magnet 31 has a polarity opposite to that of the first permanent magnet 31. Further, the opposing surface of the third permanent magnet 33 which is located on the same axis as the second permanent magnet 32 and opposes to the second permanent magnet 32 has a polarity opposite to that of the second permanent magnet 32.

The rotation shaft 24 and the first to third rotation holders 27 to 29 are synchronously rotated by a rotation mechanism 36 shown in FIG. The rotation mechanism 36 includes a motor 38 provided on a bracket 37 connected by a nut 231 to a single connection bolt 23 located at an upper portion, and a belt 39 for transmitting the rotational motion of the motor 38 to the rotation shaft 24. It is composed of As the prime mover 38, for example, a hydraulic motor or a gasoline engine is used.

Next, the first to third rotary holders 27,
First and second stator coils 41 and 42 interposed in two spaces formed between 28 and 29 will be described. The two stator coils 41 and 42 have the same configuration.

As shown in FIG. 5, first to fourth mounting plates 43, 44, 45, and 46 made of an insulating material (for example, a synthetic resin material such as epoxy resin) have holes 43 formed at four corners.
It is supported by the four bolts 23 using 1,441,451,461. Attachment plates 43, 44, 45, 46 are arranged on the connection bolts 23 to 23 at predetermined intervals in the axial direction of the rotating shaft 24.
46 are fastened and fixed by nuts 231 to 231 screwed to the bolt 23 so as to sandwich both surfaces.

A first stator coil 41 is interposed between the first and second mounting plates 43 and 44, and a second stator coil 42 is interposed between the third and fourth mounting plates 45 and 46. Have been. Both stator coils 41, 4
2, as shown in FIG. 7, a plurality (6 in this embodiment)
Coreless spiral coils 47 are arranged at the same pitch on the same circular locus about the axis of the rotating shaft 24. The outer periphery of each spiral coil 47 is regulated by an outer position regulating ring 48 made of an insulating material (for example, a synthetic resin such as epoxy resin), and the inner periphery is regulated by an inner position regulating ring 49 also made of an insulating material. As shown in FIG. 5, the second stator coil 42 includes a plurality of coreless spiral coils 50, an outer position regulating ring 51 and an inner position regulating ring 52. These coil 50 and rings 51 and 52 are connected to the coil 47 and the ring 4.
The configuration is the same as that of 8, 49.

In this embodiment, the first and second mounting plates 43 and 44 and the outer and inner position regulating rings 48 and
49 constitutes a fixed holder 53 for holding each spiral coil 47 on the support member 20. Similarly, the third
The fourth mounting plates 45 and 46 and the outer and inner position regulating rings 51 and 52 constitute a fixed holder 54 for holding each spiral coil 50 on the support member 20.

The first and second stator coils 41,
The connections of the respective coils 47 and 50 of 42 are connected in series as shown in FIG. Next, the operation of the coreless generator configured as described above will be described.

In FIG. 3, a belt 39 is driven by a motor 38.
When the rotating shaft 24 is rotated via the connection bracket 30, the first to third rotating holders 27, 28, 29 are synchronously rotated via the connection fitting 30. For this reason, the first to third permanent magnets 31, 32, 33 fitted and fixed in the respective rotary holders 27, 28, 29 are also rotated synchronously, and the shaft generated between the permanent magnets 31, 32, 33. The magnetic flux in the direction crosses the spiral coils 47 and 50 of the first and second stator coils 41 and 42, respectively. Therefore, an electromotive force is generated in the coils 47 and 50, and power is extracted from the output terminals of the coils.

Next, the operation and effect of the coreless generator configured as described above will be listed together with the configuration. In the first embodiment, the first and second stator coils 41 and 42 formed of coreless coils are supported by the support member 20.
Of the first to third rotary holders 27, so as to sandwich the stator coils 41, 42 therebetween.
28 and 29 were provided. For this reason, unlike a conventional power generator using a coil having a core, power generation efficiency can be enhanced by eliminating iron loss caused by the core.

In the first embodiment, the coils 47, 5
Since the conducting wire is wound up to the center of zero, power generation efficiency can be increased. The experimental data will be described with reference to FIG. A conventional coil 47A shown in FIG.
Has a hollow portion having an outer diameter D of 80 mm, a diameter d of 25 mm at the center, and a width W of 15 mm. The outer diameter D of the coil 47 of the present invention shown in FIG.
And has no cavity, and its width W is 15 mm. Both the coils 47A, 47 have a thickness of 0.2 mm and a width of 15 mm.
mm band conductor (rectangular conductor). The number of windings was 100 for the former and 140 for the latter, and the number of rotations of the rotating shaft 24 was 1800 / rpm. Although the voltage generated in the conventional coil 47A is 1.1V, the present invention provides a voltage of 1.9V.
Met. When a similar experiment was conducted on a coil using a linear conductor having a circular cross section instead of the band conductor, data substantially similar to the above data could be obtained.

In the first embodiment, the first and second
Since the stator coils 41 and 42 are fixed to the support member 20, no electric power is required from the coils 47 and 50 by using a brush and a rotating contact, so that the number of parts is reduced and the structure is simplified. Can be
Brush friction loss can be eliminated and weight reduction can be promoted.

In the first embodiment, the first magnetic flux shielding plate 3 is provided on the outer surfaces of the first and third rotating holders 27 and 29.
4 and the second magnetic flux shielding plate 35 are bonded, so that the magnetic flux of the first permanent magnet 31 and the third permanent magnet 33 is suppressed from leaking outward, and the magnetic flux is reduced to the first and second stator coils 4.
1, 42, and the power generation efficiency can be further improved. If the shielding plates 34 and 35 are not provided,
The support plate 21 is magnetized by the magnetic flux, and the rotational resistance of the first and third rotary holders 27 and 29 increases, whereby the support plate 21 generates heat and power loss increases.

In the first embodiment, the first to third rotary holders 27, 28, 29 are formed in a disk shape with resin, and the permanent magnets 31, 32, 3 are formed in holes formed in the rotary holder.
Since 3 is fitted, each magnet can be reliably held.

In the first embodiment, the coils 47 and 50 of the first and second stator coils 41 and 42 are formed in a spiral shape, and the spiral surfaces of the coils are formed from the sides by the permanent magnets 31, 32 and 33. , So as to be sandwiched with a predetermined gap. For this reason, when a magnetic flux running between the opposed permanent magnets 31 and 32 or between 32 and 33 crosses the coil, the coil 4
The electromotive force generated at 7,50 can be increased.

In the first embodiment, each rotary holder 2
7 to 29, permanent magnets 31 to 33 are provided at a plurality of locations, and the respective permanent magnets 31, 32, 33
Of the permanent magnets 31, 32, and 33 facing each other in the axial direction so as to be alternately reversed one by one or a plurality of pieces on the same circular locus about the axis 241. Therefore, between the opposing permanent magnets 31 and 32 or 3
When the magnetic flux running between 2 and 33 crosses the coil, the coil 4
The electromotive force generated at 7,50 can be increased.

Next, a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment,
As shown in FIG. 11, the number of coreless coils 47 and the number of permanent magnets 31 are different. That is, the first coil 4
When the first permanent magnet 311 is made to correspond to the axial direction (the direction perpendicular to the paper surface of FIG. 11) with respect to 71, the second permanent magnet 312 is ahead of the second coil 472 by a predetermined angle in the rotation (arrow) direction. In the following, the phase angles of the third permanent magnet 313 to the fifth permanent magnet 315 are successively advanced from the third coil 473 to the sixth coil 476.
Further, the relationship between the coreless coil 50 and the second and third permanent magnets 32 and 33 is also different from the first coil 471 to the sixth coil 47.
6 and the relationship between the first to fifth permanent magnets 311-315.

In the above-described second embodiment, as shown in FIG. 12, the maximum value of the electromotive force generated in the first to sixth coils 471 to 476 changes with time. The curve becomes gentle, and the fluctuation of torque when rotating the rotating shaft can be made gentle.

Next, a third embodiment in which the stator coil of the present invention is embodied in a three-phase AC motor will be described with reference to FIGS. In the third embodiment, FIG.
As shown in FIG. 3, the axial lengths of the spiral coils 47 and 50 of the stator coils 41 and 42 are longer than those of the first embodiment, and the rotating mechanism 36 provided at the end of the rotating shaft 24 is omitted. Have been. FIG. 1 shows the rotation holders 27 to 29.
As shown in FIG. 4, three permanent magnets 31 to 33 are fitted at four places so that the polarity is alternately reversed three by three.

The coils 47 and 50 constituting the stator coils 41 and 42 are all formed by rectangular coils. Since each of the coils 47 to 47 and 50 to 50 is formed substantially in the same manner, FIG.
5 will be described.

The coil 47 is formed in a spiral shape by a copper thin strip plate 55 of a strip-shaped flat plate (thickness: 0.1 mm, width: about 30 mm) made of a conductive wire. A linear groove 56 is formed on one side surface of the coil 47 from the center to the outer peripheral surface. In this groove 56, a lead wire 57 connected to the center side end of a thin strip 55 forming the coil 47 is led out from the center of the coil to the outer peripheral surface. A lead wire 58 is connected to the outer peripheral end of the thin strip 55 constituting the coils 47 and 50.

The connection structure of the first to sixth coils 471 to 476 of the stator coils 41 and 42 is as shown in FIG. 16 and FIG. That is, the first coil 47
A U-phase of a three-phase alternating current is connected to a lead wire 57 led out from the center of the reference numeral 1. The lead wire 58 of the first coil 471 is connected to the lead wire 57 of the fourth coil 474, and the lead wire 58 of the fourth coil 474 is connected to the terminal X. Lead wire 5 of the second coil 472
7 is connected to the V terminal of the three-phase AC, the lead wire 58 of the coil 472 is connected to the lead wire 57 of the fifth coil 475, and the lead wire 58 of the coil 475 is connected to the terminal Y. Similarly, the lead wire 57 of the third coil 473 is connected to the terminal W, and the lead wire 5
8 is connected to the lead wire 57 of the sixth coil 476, and the lead wire 58 of the coil 476 is connected to the terminal Z. The connection structure of the rectangular coils 501 to 506 is the same as the connection structure of the coils 471 to 476.

In the third embodiment, the terminals U of the rectangular coils 471 to 476 and the coils 501 to 506 are used.
When a three-phase AC voltage is applied to V and W, each coil 471-
At 476, magnetic fields of different polarities are generated alternately. Due to the change in the polarity of the magnetic field, the first to third rotary holders 27,
The permanent magnets 31, 32, 33 of 28, 29 repeat the repulsion and the attraction action, the holders 27 to 29 are rotated in the same direction, and the rotating shaft 24 is rotated.

Each coil 47 of the three-phase AC motor constructed as described above has a thin strip 55 wound around its center as shown in FIG. The outer diameter D of the coil 47 is 80
mm, there is almost no cavity in the center, and its width W is 15 m
m. Therefore, a predetermined voltage (24
V) When a 2 Hz alternating current is applied at a predetermined current (5.2 A), the intensity (Gauss) of the magnetic field generated at the outer peripheral portion of the coil 47 increases from 5 Gauss to 200 Gauss toward the center.

On the other hand, as shown in FIG. 18B, the outer diameter D is 125 mm, the diameter d of the central hollow portion is 36 mm, and
In a conventional coil 47A having a width W of 15 mm, when a voltage is applied under the same conditions as described above, the outer circumference of the coil 47A is 10 gauss, whereas the entire cavity is almost 140 gauss, and a large magnetic field strength I can't get it. For this reason, the three-phase AC motor of the present embodiment can reduce the size and weight as compared with the case where the conventional coil 47A is used, and can greatly improve the output torque of the rotating shaft 24.

When the three-phase AC motor is used as a generator, in other words, the rotating shaft 24 is rotated by an external motor so that the coils 471 to 476 and the coils 501 to 5
When the power generated at 06 was measured, it was found that the voltages generated at the three phases U, V and W had a regular three-phase waveform as shown in FIG.

The above embodiments can be embodied with the following modifications. 20 shows another example in which four coils 471, 472, 473, and 474 are used instead of the six coils, and three groups of permanent magnets 31 to 31 are provided at four locations. . In this embodiment, the coils 471 to 474
Are connected such that the lead wire 57 of the first coil 471 is connected to the U-phase of the two-phase AC power supply, and the lead wire 58 is connected to the second coil 4.
The lead wire 58 of the third coil 473 is connected to the lead wire 58 of the third coil 473. The lead wire 58 of the third coil 473 is connected to the lead wire 58 of the fourth coil 474, and the lead wire 57 of the fourth coil 474 is connected to the V-phase of the two-phase AC.

Therefore, also in this alternative example, the two-phase U, V
When an AC voltage is applied to the first to fourth coils 471
To 474, a magnetic field whose polarity is alternately generated is generated, so that the rotary holder 27 in which the permanent magnets 31 to 31 are embedded is rotated.

The permanent magnets 31, 32, 3 fitted in the first to third rotary holders 27, 28, 29 as shown by solid lines or chain lines in FIGS. 21 (a), 21 (b), 21 (c).
Changing the shape and number of 3 In the case of a fan shape as shown by the chain line, the magnetic flux (magnetic field) intensity increases, and the electromotive force of the coil can be increased.

The first to third permanent magnets 31, 32, 3
The number of magnetic poles 3 may be two pairs shown in FIG. 21A, one pair shown in FIG. 21B, or three pairs shown in FIG.
Other pairs may be used, or the magnetic poles may be inverted for each of one, two and three of the total of the first permanent magnets 31 shown in FIG. 8, or may be randomly inverted. .

In the case of the three-phase AC motor of the third embodiment, the correspondence between the number of coils and the number of poles of the permanent magnet is as follows:
3 to 2, 6 to 4, 9 to 6, 12 to 8, and so on. That is, each time the number of coils increases by three, the number of poles of the magnet increases by two, and when n is an integer, (3 + n ·
3) There is a pair (2 + n · 2).

As shown in FIGS. 22A and 22B,
The shapes of the coreless coils 47 and 50 of the first and second stator coils 41 and 42 may be changed. As shown in FIG. 23, a fixed holder 61 having holes for fitting the coreless coils 47 and 50 of the first and second stator coils 41 and 42 is used.

In each of the above embodiments, the first to third rotary holders 27, 28 and 29 are used.
The number of stator coils 41 and 42 is reduced to one. When four or more rotary holders are provided and the number is N, the number of stator coils is (N-1).

According to the present invention, the number N
By increasing the number (N-1) of stator coils in the axial direction, the capacity of the generator can be easily increased. In the second embodiment, the number of spiral coils 47 and 50 is six and the number of permanent magnets is five. However, the number of coils 47 and 50 is N (N = 2, 3, 4, 5, 6 ...
・), The number of permanent magnets should be N-1, N-2 or N-3.

In each of the above embodiments, the first to third rotary holders 27 to 29 and the first and second stator coils 41 and 42 are arranged in the same direction as the radial direction of the rotary shaft 24 or in the axial center 2.
It was arranged in parallel with 41, but it should be in an inclined state.

The coreless generator of each of the above embodiments is embodied as a generator at home, a generator at a factory, a generator at a hydroelectric power plant, a generator at a thermal power plant, or a generator at a nuclear power plant.

In the basic configuration shown in FIG. 2, a cylindrical or rectangular tubular magnetic flux shielding plate is fitted to the outer peripheral surface of the rotary holder positioned on the outermost side in the radial direction. The technical ideas other than claims 1 to 6 that can be grasped from the above embodiment will be described below together with their effects.

The generator according to any one of claims 2 to 6, wherein the fixed holder is integrally formed of resin, and the coil is fitted and fixed in a hole formed in the fixed holder. This generator can be easily manufactured and assembled with a reduced number of parts.

The generator according to any one of claims 2 to 6, wherein a plurality of permanent magnets 31, 32, and 33 are used, and the polarity of each of the permanent magnets is alternately inverted for each of the plurality. In this generator, each permanent magnet can be formed into a small-diameter cylindrical shape, and can be manufactured more easily than an arc-shaped magnet.

[0063]

As described in detail above, the first aspect of the present invention can improve the power generation efficiency or the output torque efficiency of the rotating electric machine.

According to the third aspect of the present invention, the lead wire can be properly derived from the center of the coil when a rectangular coil is used.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a first basic structure of a generator according to the present invention.

FIG. 2 is a cross-sectional view showing a second basic structure of the generator according to the present invention.

FIG. 3 is a front view of a generator according to a first embodiment of the present invention.

FIG. 4 is an exploded perspective view of the support member according to the first embodiment.

FIG. 5 is an exploded perspective view showing first to third rotary holders holding a permanent magnet, first and second stator coils, and the like.

FIG. 6 is a sectional view taken along line 1-1 of FIG. 3;

FIG. 7 is a sectional view taken along line 2-2 of FIG. 3;

FIG. 8 is a perspective view showing the polarity of a permanent magnet.

FIG. 9 is a circuit diagram showing a connection structure of first and second stator coils.

FIG. 10 is an explanatory view showing a conventional coil and a coil of the present invention.

FIG. 11 is a front view showing a relationship between a permanent magnet and a coreless coil according to a second embodiment of the present invention.

FIG. 12 is a graph showing the electromotive force of each coil of the generator according to the second embodiment.

FIG. 13 is a front view of the electric motor according to the third embodiment.

FIG. 14 is a sectional view showing the structure of a rotary holder and a magnet.

FIG. 15 is an enlarged perspective view of a spiral coil.

FIG. 16 is an explanatory diagram showing a connection structure of a stator coil.

FIG. 17 is a circuit diagram showing a connection structure of a stator coil.

FIG. 18 is an explanatory diagram of the effects of the coil of the present invention and a conventional coil.

FIG. 19 is a graph showing the output voltage of the coil of the present invention.

FIG. 20 is a front view showing another embodiment of the stator coil.

21 (a), (b) and (c) are front views showing another embodiment of the shape, number and arrangement of the permanent magnets of the present invention.

FIGS. 22A and 22B are front views showing another embodiment of the structure of the coreless coil of the present invention.

FIG. 23 is a perspective view showing another embodiment of the fixed holder for holding the coreless coil of the present invention.

[Explanation of symbols]

Reference numeral 11 denotes a housing, 12 denotes a rotating shaft, 13 denotes a first rotary holder that forms a rotor, 14 denotes a second rotary holder that forms a rotor, 15 denotes a first permanent magnet that forms a rotor, 16 ...
Second permanent magnet constituting the rotor, 18 coreless coil, 20 supporting member, 24 rotating shaft, 27 to 29 first to third rotating holders constituting the rotor, 31 to 33 constituting the rotor 1st to 3rd permanent magnets, 311 to 315 ...
First to fifth permanent magnets constituting the rotor, 34, 35: first and second magnetic flux shielding plates, 41, 42: first and second stator coils, 47, 50: coreless coils, 471 to 476
... First to sixth coreless coils.

Claims (6)

[Claims] 1. A rotor provided with a holder on a rotating shaft supported by a housing, and a plurality of permanent magnets provided so that different poles alternately appear in the circumferential direction with respect to the holder. And a rotating electric machine such as a motor or the like having a stator coil composed of a plurality of spiral coils supported so that a spiral surface faces a magnetic pole of the permanent magnet of the rotor. A stator coil for a rotating electric machine, wherein a conductor forming the coil is wound around the portion in a spiral shape with almost no gap. 2. The rotating electric machine according to claim 1, wherein the rotor is disposed at a plurality of locations at predetermined intervals in an axial direction or a radial direction of a rotating shaft, and the stator coil is interposed between the opposed rotors. Stator coil. 3. The stator coil of a rotating electric machine according to claim 1, wherein the spiral coil is a rectangular coil formed by spirally winding a strip-shaped rectangular conductor. 4. The flat coil according to claim 3, wherein a groove is formed on one side surface of the rectangular coil from the center to the outer peripheral surface, and the groove accommodates a lead wire connected to the end of the conductor at the center of the rectangular coil. The stator coil of the rotating electric machine that is led out. 5. The method according to claim 1, wherein:
A stator coil for a rotating electric machine, wherein a shield plate for shielding magnetic flux of a permanent magnet is provided outside a holder constituting the rotor. 6. The rotating electric machine according to claim 1, wherein each of the spiral coils constituting the stator coil is disposed at substantially equal pitches at six locations in the circumferential direction.
Among the sixth to sixth spiral coils, the lead wires derived from the ends of the conductors at the center of the first to third spiral coils are connected to three terminals U, V, and W of the three-phase AC power source, respectively. The leads connected to the ends of the conductors at the outer periphery of the first to third coils are connected to the leads connected to the ends of the conductors at the center of the fourth to sixth spiral coils, respectively. Sixth
The lead wire connected to the wire end of the outer periphery of the coil of
A stator coil of the rotating electric machine connected to terminals X, Y, and Z, respectively.