JPH0746807A - Rotor of rotating electric machine - Google Patents

Abstract

PURPOSE:To effectively reduce a magnetic noise even under a condition that a variable-frequency power supply is used by forming an extremely large number of slots on a rotor core. CONSTITUTION:A rotor 1 has a structure wherein many sheetlike unit members 4 pointed in its axial direction are arranged around a rotor core 3 in a mutually adjacent state and end rings 5, 5 are fixed to both ends. The sheetlike unit members 4 are formed in a strip shape long in axial direction of the rotor core 3, sheetlike conductors 7, 7 are set to a state that they are overlapped on both sides of sheetlike magnetic substances 6 (slant belts are executed to the surface of the sheetlike magnetic substances 6 in order to be easily discriminated). Thereby, slots are formed between the sheetlike magnetic substances 6. The sheetlike magnetic substances 6 and the sheetlike conductors 7 are formed in a wedge shape in such a way that the cross-sectional shape of a face at right angles to a rotor shaft 2 becomes narrow as it advances toward the side of the rotor shaft 2, and they display a ring shape in which they are brought into close contact with each other in the arranged state of the sheetlike unit members 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a rotary electric machine in which a rotor core is provided with a cage conductor.

[0002]

2. Description of the Related Art Generally, an iron core used in an induction motor is constructed by laminating a large number of unit steel plates obtained by punching electromagnetic steel plates. Both are provided with slots. In this case, the squirrel-cage rotor most widely used in induction motors has a shape in which a large number of slots are provided on the outer peripheral portion of the rotor core, and conductors are stored in these slots. Both ends of each conductor are connected by an end ring.

By the way, in such an induction motor, as is well known, there is a property that a harmonic magnetic flux is generated due to the presence of the slot, and therefore, the electromagnetic force due to the harmonic magnetic flux causes the stator magnetic force. Also, there is a drawback that they act between the rotors and cause magnetic noise.

As a general means for solving such a drawback, conventionally, the slots of the rotor core are skewed, or the number of slots of each pole and each phase of the rotor core is a non-integer. It is known to change the total number of slots.

[0005]

In recent years, in order to smoothly start and control the speed of an induction motor, its power source is often obtained from an inverter device which is a variable frequency power source. When using
The above-mentioned drawbacks cannot be solved by means such as the skew or the change of the number of slots.

Specifically, since the inverter device is a kind of switching power supply, it is unavoidable that the waveforms of its output voltage and current are non-sinusoidal, and the sine wave power supply is generated during the magnetomotive force of the induction motor. More harmonic magnetic flux components are included than when. However, since the normal means of changing the skew or the number of slots can only reduce the harmonic magnetic flux component of the specific order, the reduction effect is insufficient, and as a result, it is difficult to reduce the magnetic noise. is there.

On the other hand, it has been found that the number of slots provided in the rotor core should be extremely increased in order to reduce the magnetic noise under the situation where the variable frequency power source is used. However, in order to make the number of slots extremely large in this way, it is necessary to make each slot an extremely small shape, while the rotor core has a unit steel plate obtained by press punching an electromagnetic steel plate. Since they are constructed by stacking, there is a limit to the miniaturization of the slots, and in reality, magnetic noise should be reduced by increasing the number of slots provided in the rotor core extremely. Was difficult to achieve.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to make it possible to form an extremely large number of slots in a rotor core and to use a variable frequency power supply. It is an object of the present invention to provide a rotor of a rotary electric machine that has an effect that magnetic noise can be effectively reduced even in the lower part and that the number of slots can be easily set and changed.

[0009]

In order to achieve the above object, the present invention provides a rotor of a rotary electric machine comprising a rotor core rotatably supported in a stator, the outer periphery of said rotor core. A plurality of plate-shaped magnetic bodies are arranged on the surface so as to be oriented in the axial direction and have a predetermined interval therebetween, and the plate-shaped magnetic bodies are oriented on the outer peripheral surface of the rotor core in the axial direction and A plurality of plate-shaped conductors are arranged so as to be located between the bodies, and both end portions of the plate-shaped conductor group are connected by a pair of end-rings (claim 1).

In this case, at least one of the plate-shaped magnetic body and the plate-shaped conductor is formed in a wedge shape in which the cross-sectional shape of the plane orthogonal to the rotor axis becomes narrower toward the rotor axis side. Thus, the plate-shaped magnetic body and the plate-shaped conductor can be configured to have an annular shape as a whole (claim 2).

Further, a plurality of plate-shaped unit members each having a plate-shaped magnetic body and a plate-shaped conductor superposed in advance are provided, and these plate-shaped unit members are directed to the outer peripheral surface of the rotor core in the axial direction thereof. It may be arranged to be arranged in (3).

Further, between the plate-shaped magnetic body and the plate-shaped conductor,
A configuration may be provided in which a leakage current regulating means for regulating the leakage current between them is provided (claim 4).

It is desirable that the plate-shaped magnetic body is formed of an electromagnetic steel plate and the plate-shaped conductor is formed of a conductive material having a relatively large resistance value (claim 5). It is desirable that the body is formed of a grain-oriented electrical steel sheet that is set to have a large relative magnetic permeability in the radial direction of the rotor (claim 6).

The plate-shaped conductor may be formed longer than the plate-shaped magnetic body, and then both end portions of the plate-shaped conductor may be arranged so as to project from the plate-shaped magnetic body (claim 7). ,
Further, both end portions of at least one of the plate-shaped magnetic body and the plate-shaped conductor may be formed in a shape protruding from the end ring.

Further, the rotor may be provided with a reinforcing member covering the plate-shaped magnetic body and the plate-shaped conductor (claim 9).

The leakage current regulating means may be composed of an insulating member interposed between the plate-shaped magnetic body and the plate-shaped conductor (claim 10).

In this case, the insulating member may cover at least one of the end surface of the plate-shaped magnetic body in the rotor radial direction and the end surface of the plate-shaped conductor in the rotor radial direction.

The leakage current regulating means may be composed of a plate-shaped spacer member having a resistance value higher than those of the plate-shaped magnetic body and the plate-shaped conductor (claim 12).

In this case, a plurality of conductor unit members having plate spacer members are provided on both surfaces of the plate conductor in the circumferential direction of the rotor, and these conductor unit members and a plurality of plate magnetic members are provided. The body may be arranged on the outer peripheral surface of the rotor core so as to be oriented in the axial direction (claim 13).

Further, a plurality of magnetic body unit members in which plate-like spacer members are arranged are provided on both surfaces of the plate-like magnetic body in the circumferential direction of the rotor, and the magnetic body unit members and a plurality of plate-like conductors are provided. Can be arranged on the outer peripheral surface of the rotor core so as to be oriented in the axial direction (claim 14).

Further, a plurality of unit members each having the above-mentioned plate-shaped magnetic material, plate-shaped spacer members and plate-shaped conductors alternately arranged in advance are provided, and these unit members are provided on the outer peripheral surface of the rotor core. It is also possible to adopt a configuration in which they are arranged so as to be oriented in the axial direction (claim 15).

The plate-shaped spacer member may be configured to cover at least one of the end face of the plate-shaped magnetic body in the rotor radial direction and the end face of the plate-shaped conductor in the rotor radial direction (claim 16). .

Further, at least one of the plate-shaped magnetic body and the plate-shaped conductor is formed with a protrusion projecting in a direction close to each other, and is formed due to the presence of the protrusion between adjacent plate-shaped magnetic bodies and plate-shaped conductors. It is also possible to adopt a configuration in which the space portion to be used is used as a leakage current regulating means (claim 17).

[0024]

According to the rotor of the rotating electric machine of the present invention, a plurality of plate-shaped magnetic bodies are arranged on the outer peripheral surface of the rotor core so as to be oriented in the axial direction thereof and have a predetermined interval therebetween. Therefore, the state is equivalent to the state in which the slots are formed between the plate-shaped magnetic bodies. In addition, a plurality of plate-shaped conductors are arranged on the outer peripheral surface of the rotor core so as to be oriented in the axial direction and located between the plate-shaped magnetic bodies (that is, the portions corresponding to the slots). As a result of connecting both ends of the body group with a pair of end ring,
A squirrel cage rotor in which both ends of the secondary conductor group housed in the slot are connected by an end ring is formed. In this case, since the thicknesses of the plate-shaped magnetic body and the plate-shaped conductor and their arrangement pitch can be set to a significantly small state, an extremely large number of slots can be formed in the rotor core. It is possible to form. Also, the number of slots can be easily set and changed only by changing the thickness dimension of the plate-shaped magnetic body and the arrangement pitch thereof.

According to another aspect of the rotor of the rotating electric machine, at least one of the plate-shaped magnetic body and the plate-shaped conductor is formed in a wedge shape in cross section, and the plate-shaped magnetic body and the plate-shaped magnetic body are formed. Since the conductor is configured to have an annular shape as a whole, it is possible to prevent an extra gap from being formed between the plate-shaped magnetic body and the plate-shaped conductor, and to increase the space factor of the slot (the space occupied by the plate-shaped conductor). Rate) can be improved.

According to the rotor of the rotating electric machine of the third aspect, since the plate-shaped magnetic body and the plate-shaped conductor are configured as a plate-shaped unit member that has been superposed in advance, the plate-shaped magnetic body and the plate-shaped magnetic body are formed. The number of steps required for arranging the conductors can be reduced, and the assembling workability can be improved.

According to the rotor of the rotating electric machine of the present invention, the leakage current regulating means for regulating the leakage current between the plate-shaped magnetic body and the plate-shaped conductor is provided between the plate-shaped magnetic body and the plate-shaped conductor.
The leakage of the induced current flowing through the plate-shaped conductor is suppressed, and the operation efficiency is improved.

According to the rotor of the rotating electric machine of the fifth aspect, since the plate-shaped magnetic body is formed of the electromagnetic steel plate,
Since the eddy current loss is suppressed and the resistance value of the plate-shaped conductor forming the secondary conductor is relatively large, the starting characteristic is improved.

According to the rotor of the rotating electric machine of claim 6, since the plate-shaped magnetic body is set so that the relative permeability in the radial direction of the rotor is large, the magnetic property of the rotor is reduced. The characteristics will be improved and the efficiency can be expected to be improved.

According to the rotor of the rotating electric machine of the seventh aspect, since both end portions of the plate-shaped conductor are projected from the plate-shaped magnetic body, it is possible to expect a heat radiation effect at the projected portions. become.

According to the rotor of the rotating electric machine of the present invention, since both end portions of at least one of the plate-shaped magnetic body and the plate-shaped conductor are projected from the end ring, the projected portion is also formed in this case. You can expect the heat dissipation effect in.

According to the rotor of the rotating electric machine of the ninth aspect, since the rotor is provided with the reinforcing member covering the plate-shaped magnetic body and the plate-shaped conductor, the rotor is rotated. It is possible to reliably prevent the situation where the plate-shaped magnetic body or the plate-shaped conductor falls off due to the centrifugal force caused by.

According to the rotor of the rotating electric machine of the tenth aspect, the leakage current regulating means is composed of an insulating member interposed between the plate-shaped magnetic body and the plate-shaped conductor.
It is possible to enhance the effect of suppressing the leakage of the induced current flowing through the plate conductor.

According to the rotor of the eleventh aspect of the present invention, at least one of the end face of the plate-shaped magnetic body in the rotor radial direction and the end face of the plate-shaped conductor in the rotor radial direction is
Since it is covered with the insulating member which is the leakage current regulating means, the leakage current through the end face can be suppressed and the operation efficiency can be improved.

According to the rotor of the rotating electric machine of the twelfth aspect, the leakage current regulating means is composed of a plate-shaped spacer member having a resistance value larger than that of the plate-shaped magnetic body and the plate-shaped conductor. The plate-shaped spacer member can be handled in the same manner as the plate-shaped magnetic body and the plate-shaped conductor, and therefore, the above-described effect of suppressing the leakage of the induced current can be obtained while improving the assembly workability.

According to the rotor of the rotating electric machine of the thirteenth aspect, since the plate-shaped conductor and the plate-shaped spacer member are configured as a previously combined conductor unit member, the plate-shaped conductor and the plate-shaped spacer member are combined. The number of steps required for arranging the spacer members can be reduced, and the assembly workability can be further improved.

According to the rotor of the rotating electric machine of the fourteenth aspect, since the plate-shaped magnetic body and the plate-shaped spacer member are configured as a magnetic body unit member that is combined in advance, the plate-shaped magnetic body and the plate-shaped spacer member are formed. The number of steps required for arranging the spacer members can be reduced, and the assembly workability can be further improved.

According to the rotor of the rotating electric machine of the fifteenth aspect, the plate-shaped magnetic body, the plate-shaped spacer member and the plate-shaped conductor are
Since the unit members are combined in advance, the number of steps required for arranging the plate-shaped magnetic body, the plate-shaped spacer member and the plate-shaped conductor is reduced, and the assembly workability is greatly improved. realizable.

According to the rotor of the rotating electric machine of claim 16, at least one of the end face of the plate-shaped magnetic body in the rotor radial direction and the end face of the plate-shaped conductor in the rotor radial direction is
Since it is covered with the plate-like spacer member which is the leakage current regulating means, the leakage current through the end face can be suppressed and the operation efficiency can be improved.

According to the rotor of the rotating electric machine of the seventeenth aspect, the space forming the leakage current regulating means can be obtained by the projection formed on at least one of the plate-shaped magnetic body and the plate-shaped conductor. Thus, the effect of suppressing the leakage of the induced current as described above can be realized together with the reduction of the number of parts and the cost thereof.

[0041]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3, the rotor 1 is, for example, an induction motor as a rotating electric machine,
A large number of plate-shaped unit members 4 oriented in the axial direction are arranged adjacent to each other around a rotor core 3 having a rotor shaft 2, and end face portions at both ends of the plate-shaped unit members 4 ( In particular, it has a structure in which a pair of end ring 5 and 5 are fixed in abutting manner to the end surface of a plate-shaped conductor 7 described later. The rotor core 3 is formed by axially stacking a predetermined number of magnetic steel sheets formed in an annular shape.

Here, the plate-shaped unit member 4 is actually provided on the order of several hundreds, but it is difficult to express this in the drawing, so in FIG.
It is shown in a state in which the number of plate-shaped unit members 4 is reduced from the actual state. Therefore, the plate-shaped unit member 4 shown in FIG. 1 and other drawings is drawn with its thickness dimension (the dimension in the circumferential direction of the rotor 1) larger than the actual dimension.

The plate-shaped unit member 4 is in the form of a strip that is long in the axial direction of the rotor core 3, and has a plate-shaped magnetic body 6 made of, for example, an electromagnetic steel plate on both sides of a plate made of copper or aluminum. In the configuration shown in FIG. 1, the plate-shaped magnetic body 6 and the plate-shaped conductor 7 are stacked.
In order to facilitate the distinction between the two, the surface of the plate-shaped magnetic body 6 is shown with a hatched band.

As shown in FIG. 4, the plate-shaped magnetic body 6 and the plate-shaped conductor 7 have a wedge shape in which the cross-sectional shape of the plane orthogonal to the rotor shaft 2 becomes narrower toward the rotor shaft 2 side. Thus, the cross-sectional shape of the plate-shaped unit member 4 also has a wedge shape. In this case, the plate-shaped magnetic body 6 is configured so that its maximum thickness dimension is 2 mm or less, and the plate-shaped conductor 7 has a maximum thickness dimension in a state where two of them are superposed. The maximum thickness dimension of the plate-shaped magnetic body 6 is set to be equal to or less than the maximum thickness dimension.

The plate-shaped unit member 4 is manufactured, for example, as a so-called clad metal which has undergone the cold pressing and drawing steps as described below. That is, as shown in FIG. 5, a spool RA around which an electromagnetic steel plate A that is a material of the plate-shaped magnetic body 6 is wound, and a spool RB around which a copper plate B that is a material of the plate-shaped conductor 7 is wound are prepared. Then, the electromagnetic steel sheet A and the copper sheets B, B drawn from the spools RA, RB are subjected to a degreasing / cleaning step and a surface activation step, respectively, and then a step of pulling out while performing pressure bonding is performed.
A semi-finished member C having a cross-sectional shape as shown in FIG. 4 is obtained, and the semi-finished member C is subjected to a diffusion annealing process and then cut into a strip shape to manufacture the plate-shaped unit member 4. .

It is to be noted that, after the electromagnetic steel sheet A and the copper sheet B as described above are formed in a wedge-shaped cross section in advance, a degreasing / cleaning step, a surface activation step, a pressure rolling step, a diffusion annealing step and a cutting step are sequentially performed. The plate-shaped unit member 4 can also be manufactured according to the above, and a hot-rolling press-bonding process is used for bonding between the plate-shaped magnetic body 6 and the plate-shaped conductor 7, or a bonding process using an adhesive. It is also possible to adopt other manufacturing means such as adopting.

The plate-shaped unit members 4 are arranged in a state in which a predetermined number of them are in contact with each other so as to form an annular shape as a whole, and the rotor core 3 is formed in such an annular shape. It is fitted and fixed to the outer peripheral surface of the above, and the end ring 5 is fixed to both ends thereof by using so-called diffusion bonding means.

According to this embodiment having the above-mentioned structure, various effects as described below can be obtained. That is, in the present embodiment, a plurality of plate-shaped magnetic bodies 6 and plate-shaped conductors 7 are alternately arranged on the outer peripheral surface of the rotor core 3 so as to be oriented in the axial direction. A slot is formed between each of the plate-shaped magnetic bodies 6, and the plate-shaped conductor 7 is accommodated in the slot-corresponding portion as a secondary conductor. Further, as a result of connecting both end portions of the plate-shaped conductor 7 as described above by the pair of end ring 5, the rotor 1 connects both ends of the conductor group accommodated in the slot by the end ring. It will be configured as a squirrel cage rotor of the above-mentioned form.

In this case, the thickness of each of the plate-shaped magnetic body 6 and the plate-shaped conductor 7 can be set to an extremely small value of 1 mm or less, and the arrangement pitch thereof can be set to be significantly small. Therefore, it is possible to form an extremely large number of slots in the rotor core 3 as compared with the conventional configuration in which the slots are formed by press punching an electromagnetic steel plate. Further, when setting and changing the number of slots, it is sufficient to change the thickness dimension of the plate-shaped magnetic bodies 6 and the arrangement pitch thereof (that is, the dimension of the plate-shaped unit members 4). And, the change can be easily made.

In general, an induction motor generates a harmonic magnetic flux due to the presence of a slot. However, the harmonic magnetic flux order μ due to the stator slot and the harmonic magnetic flux order ν due to the rotor slot are generated. Is obtained by the following formula. μ = (k1z1 / P) +1 ν = (k2z2 / P) +1 where P is the number of pole pairs, k1 and k2 are integers, z1 is the number of stator slots, and z2 is the number of rotor slots.

The harmonic magnetic fluxes in the stator and the rotor as described above mutually interfere with each other, and a force that deforms the stator core and the frame or an electromagnetic force that vibrates the rotor core operates, and these cause vibration and noise. It becomes a generation source. In particular, the electromagnetic force as described above acts as a so-called polygonal force that deforms the iron core into an M-shaped polygon, and M is obtained by the following equation.

M = P (μ ± ν) = (k1z1 + P) ± (k2z2 + P) In this case, usually, the harmonic magnetic flux is the strongest k1 =
It is sufficient to consider k2 = 1 and therefore M = z1 + z
2 + 2P, or M = z1 -z2. When the M obtained in this way is small, the vibrations and noises described above are likely to occur, and when z1 and z2 are close to each other, large vibrations and noises are generated. On the other hand, when an extremely large number of slots are formed in the rotor core 3 as in the configuration of this embodiment, z1 has a relationship that is significantly larger than z2, so M becomes large. Vibration and noise are less likely to occur.

Further, the vibration generated by the harmonic magnetic flux
The noise frequency F is given by the following equation. However, in the following equation, f is the power supply frequency and s is the slip.

[Equation 1] For example, when there are two poles (the number of counter poles P = 1), the number of rotor slots is 600, the power supply frequency f = 50 Hz, and the slip s = 0, F = 30000 Hz, 2 from the above formula (1).
9900 Hz and 30100 Hz are obtained. Each such frequency band is outside the human audible frequency range,
Therefore, according to the configuration of this embodiment capable of forming a large number of slots as described above, even if vibration due to the harmonic magnetic flux occurs, it is unlikely to cause noise. Further, when the induction motor is driven by an inverter device which is a variable frequency power supply, the carrier frequency of the inverter device is several tens of times the power supply frequency f = 50 Hz as described above, so that it is generated by the harmonic magnetic flux. The vibration / noise frequency F becomes a higher value, and if the number of stator slots is at least a certain number, the above noise prevention effect can be sufficiently exerted.

Further, in the present embodiment, the cross-sectional shape of the plate-shaped magnetic body 6 and the plate-shaped conductor 7, especially the cross-sectional shape of the plane orthogonal to the rotor shaft 2 becomes wider toward the rotor shaft 2 side. It is formed in a narrow wedge shape, and the plate-shaped magnetic body 6 and the plate-shaped conductor 7 are arranged in contact with the outer peripheral surface of the rotor core 3 so as to form an annular shape as a whole. As a result, the plate-shaped magnetic body 6 and the plate-shaped conductor 7 come into a state of being in close contact with each other. Therefore, the space factor (the space factor of the plate-shaped conductor 7) of the slot-equivalent portion formed between the plate-shaped magnetic members 6 is improved.

Further, in the present embodiment, the plate-shaped magnetic body 6 and the plate-shaped conductor 7 are formed by the plate-shaped unit member 4 which is preliminarily superposed.
As a result, the number of steps required for arranging the plate-shaped magnetic bodies 6 and the plate-shaped conductors 7 can be reduced, and as a result, the assembling workability can be improved. In addition, in this embodiment, since the plate-shaped magnetic body 6 is made of the electromagnetic steel plate, the eddy current loss can be suppressed.

Further, when the maximum thickness dimension of the plate-shaped magnetic body 6 is set to 2 mm or less as in this embodiment, the eddy current in the plate-shaped magnetic body 6 is significantly reduced. In this respect also, it becomes possible to contribute to the improvement of efficiency.

As the plate-shaped magnetic body 6, a grain-oriented electromagnetic steel plate set to have a large relative magnetic permeability in the radial direction of the rotor 1 may be used. When a magnetic electrical steel sheet is used, the magnetic characteristics of the rotor 1 are improved, and it is possible to expect an improvement in efficiency in this respect as well.

In the above embodiment, the plate conductor 7 is used.
May be formed of a material having a relatively large resistance value (for example, copper / aluminum alloy or brass). In such a structure, the resistance value of the plate-shaped conductor 7 forming the secondary conductor is Is relatively large and the starting characteristics are improved.

In the first embodiment, the plate-shaped unit member 4 is constructed by stacking plate-shaped conductors 7, 7 on both sides of the plate-shaped magnetic body 6, and the plate-shaped magnetic bodies 6 and Although the cross-sectional shape of both of the plate-shaped conductors 7 is set to the wedge shape, it is needless to say that the present invention is not limited to this.
Below, some of the other structural examples of the plate-shaped unit member 4 are demonstrated, referring FIG.

That is, FIG. 6A shows an example in which plate-shaped conductors 6 having a wedge-shaped cross section are superposed on both sides of a plate-shaped conductor 7 having a wedge-shaped cross section. FIG. 6B shows an example in which plate-shaped conductors 7 having a wedge-shaped cross section are superposed on both sides of a plate-shaped magnetic body 6'having a rectangular cross-section. Figure 6
(C) shows an example in which plate-shaped magnetic bodies 6 having a wedge-shaped cross section are superposed on both sides of a plate-shaped conductor 7'having a rectangular cross-section. FIG. 6D shows an example in which a plate-shaped magnetic body 6 having a wedge-shaped cross section and a plate-shaped magnetic body 6 ′ having a rectangular cross-section are superposed on both sides of a plate-shaped conductor 7 having a wedge-shaped cross section. Figure 6 (e)
Is an example in which plate-shaped conductors 7 ', 7'having a rectangular cross section are superposed on both sides of a plate-shaped magnetic body 6 having a wedge-shaped cross section.

FIG. 6 (f) shows a structure in which the plate-shaped conductors 7 having a wedge-shaped cross-section are superposed on the plate-shaped magnetic bodies 6'and 6'having a rectangular cross-section. Figure 6
(G) is an example in which the plate-shaped magnetic bodies 6 having a rectangular cross-section are superposed on the plate-shaped conductors 7 having wedge-shaped cross-sections which are superposed on each other. FIG. 6 (h) shows an example in which plate-shaped conductors 7 having a rectangular cross-section are superposed on plate-shaped magnetic bodies 6 having wedge-shaped cross-sections which are superposed on each other.

In FIG. 6 (i), a plate-shaped magnetic body 6'having a rectangular cross-section and a plate-shaped conductor 7 having a wedge-shaped cross section are superposed on each other. FIG. 6 (j) shows a configuration in which a plate-shaped magnetic body 6 having a wedge-shaped cross section and a plate-shaped conductor 7'having a rectangular cross-section are overlapped with each other. FIG. 6K shows a configuration in which the plate-shaped magnetic body 6 and the plate-shaped conductor 7 having a wedge-shaped cross section are overlapped with each other. In FIG. 6 (l), a plate-shaped magnetic body 6'having a rectangular cross section and a plate-shaped conductor 7'having a wedge-shaped cross section are superposed on both sides of a plate-shaped magnetic body 6'and a plate-shaped conductor 7'having a rectangular cross section. It is configured.

FIG. 7 shows a second embodiment of the present invention, and only parts different from the first embodiment will be described below. That is, in the second embodiment, the insulating films 8 and 8 are provided between the plate-shaped magnetic body 6 and the plate-shaped conductor 7 in the plate-shaped unit member 4 as insulating members for forming the leakage current regulating means. It is configured to intervene. In this case, the insulating film 8 may be formed by sandwiching a sheet made of an insulating material, coating the insulating material, or the like, but may be formed by oxidizing the surface of the plate-shaped magnetic body 6. Alternatively, it may be a strip-shaped plate member made of an insulating material.

According to this embodiment having such a configuration,
Since the insulating film 8 is interposed between the plate-shaped magnetic body 6 and the plate-shaped conductor 7, the leakage of the induced current flowing in the plate-shaped conductor 7 to the plate-shaped magnetic body 6 side is suppressed. As a result, operating efficiency will be improved.

FIGS. 8 to 10 show the third, fourth and fifth embodiments of the present invention, and only the portions different from the first embodiment will be described below. That is, each of these embodiments is intended to prevent the plate-shaped unit member 4 attached to the outer peripheral surface of the rotor core 3 from falling off.
In the third embodiment shown in FIG. 8, a cylindrical sleeve 9 as a reinforcing member is fitted around the rotor 1 so as to cover the plate-shaped unit member 4. The sleeve 9 is made of metal (conductive material or magnetic material), and it is desirable that the thickness dimension thereof be as small as possible.

Further, in the fourth embodiment shown in FIG. 9, the metal plate 10 as a reinforcing member is wound around the rotor 1 so as to cover the plate-shaped unit member 4, and the winding start end and end thereof are wound. Are connected to each other. Further, in the fifth embodiment shown in FIG. 10, a metal wire 11 as a reinforcing member is wound around the rotor 1 so as to cover the plate-shaped unit member 4.

In each of the third, fourth and fifth embodiments, the reinforcing member (sleeve 9, metal plate 10, wire 1) around the rotor 1 and covering the plate-shaped unit member 4 is provided.
Since 1) is provided, it is possible to reliably prevent the plate-shaped unit member 4 from falling off due to the centrifugal force caused by the rotation of the rotor 1.

FIG. 11 and FIG. 12 show a sixth embodiment of the present invention, and only the parts different from the first embodiment will be described below. That is, in FIG. 11 showing the rotor 1 in a disassembled state in which a part thereof is omitted, a plate-shaped magnetic body 12 and a plate-shaped conductor 1 that are elongated strips in the axial direction of the rotor core 3 are formed.
3 is provided for each of the plurality of rotor cores 3
Are arranged in a staggered manner in the state of being directed in the axial direction around, and a pair of end ring 5 are fixed in abutting shape to both end portions thereof. In FIGS. 11 and 12, the plate-shaped magnetic body 12 and the plate-shaped conductor 13 have respective thickness dimensions (dimensions in the circumferential direction of the rotor 1) due to the same circumstances as described in the first embodiment. Is drawn larger than the actual size. Also in this embodiment, an insulating member may be provided between the plate-shaped magnetic body 12 and the plate-shaped conductor 13 as required.

In this case, the plate-shaped magnetic body 12 is formed of a grain-oriented electromagnetic steel plate set so that the relative magnetic permeability in the radial direction of the rotor 1 is large, and the plate-shaped conductor 13 has a resistance value. Are formed of a relatively large material. Further, as shown in FIG. 12, the plate-shaped magnetic body 12 and the plate-shaped conductor 13 have a wedge shape in which the cross-sectional shape of the plane orthogonal to the rotor shaft 2 becomes narrower toward the rotor shaft 2 side. And a predetermined number of them are arranged in contact with each other to form an annular shape as a whole. The plate-shaped magnetic body 12 is configured such that the maximum thickness dimension thereof is 2 mm or less, and the maximum thickness dimension of the plate-shaped conductor 13 is
The maximum thickness dimension of the plate-shaped magnetic body 12 is set to be equal to or less than the maximum thickness dimension.

The sixth embodiment having such a structure also has the same effect as that of the first embodiment. However, in the sixth embodiment, since the plate-shaped magnetic body 12 and the plate-shaped conductor 13 are separate members, the required number of steps is reduced as in the first embodiment in which these members can be handled as one member. Although it is not possible to achieve the effect of reducing the assembly workability and improving the assembling workability, it is possible to easily increase the number of combinations of the thickness dimensions of the plate-shaped magnetic body 12 and the plate-shaped conductor 13 and easily change the specifications. It has the advantage that it can be done.

In the sixth embodiment, the plate-shaped magnetic body 12 is used.
Both of the plate-shaped conductor 13 and the plate-shaped conductor 13 are configured to have a wedge-shaped cross section, but it goes without saying that the present invention is not limited to this.
For example, as shown in FIG. 13, a plate-shaped magnetic body 1 having a rectangular cross section
2'and the plate-shaped conductor 13 having a wedge-shaped cross section are arranged alternately, or as shown in FIG. 14, the plate-shaped magnetic body 12 having a wedge-shaped cross section and the plate-shaped conductor 13 'having a rectangular cross section.
It is also possible to arrange the and in a staggered manner.

FIGS. 15 to 17 show a seventh embodiment of the present invention in which the sixth embodiment as described above is modified. Only the portions different from the sixth embodiment will be described below. To do. That is, in the seventh embodiment, the plate-shaped magnetic body 12
A plate-shaped conductor 13 'which is elongated by a dimension d is provided (see FIG. 16).
), The plate-shaped conductors 13 'in their arranged state
Both end portions of the magnetic disk are configured so as to project from the plate-shaped magnetic body 12 by a dimension d / 2 (see FIGS. 15 and 17, but in FIG. 15, the plate-shaped magnetic body 12 and the plate-shaped conductor are shown. The surface of the plate-shaped magnetic body 12 is shown with diagonal lines for facilitating the distinction of 13 '). Further, in this case, the pair of end ring 5 are fixed to both end surfaces of the plate-shaped conductor 13 ′ in a butt shape, and there is a space between each end ring 5 and the plate-shaped magnetic body 12. The department will exist.

According to the seventh embodiment thus constructed,
Since both end portions of the plate-shaped conductor 13 'project from the plate-shaped magnetic body 12 and are exposed to the air, the heat radiation effect at the projecting portions can be expected.

In the seventh embodiment described above, the simple structure of the end ring 5 is used. However, as shown in FIG. 18, a large number of protrusions are fitted between the end portions of the plate-shaped conductor 13 '. It is also possible to use the end ring 14 having 14a. In such a structure, the plate-shaped conductor 13 'and the end ring 1 are provided.
The electrical connection between the four can be surely made.

FIGS. 19 to 21 show an eighth embodiment of the present invention which is a modification of the seventh embodiment described above, and only the portions different from the seventh embodiment will be described below. To do. That is, in the eighth embodiment, the plate-shaped conductor 1
It is characterized in that notches 13a are formed in the protruding portions of the plate-shaped magnetic body 12 at both ends of 3 '(see FIG. 20). In this case, the cutout portion 13a is formed in a portion existing on the outer peripheral side of the rotor 1 in the state where the plate-shaped conductors 13 'are arranged, and the plate-shaped conductor 13' is formed.
In the outer circumference of the protruding parts at both ends of the
The flat cylindrical end ring 15, 15 set to 2 is fitted and fixed. In this case, since the projecting dimension of the plate-shaped conductor 13 'is also d / 2, the end face of the plate-shaped conductor 13' and the end face of the end ring 15 are flush with each other.

According to the eighth embodiment thus constructed,
The contact area between the plate-shaped conductor 13 'and the end ring 15 can be widened so that the two can be reliably electrically connected, and the end ring 15 becomes the plate-shaped magnetic body 13'. On the other hand, it comes to play a so-called "taga" role, and it becomes possible to effectively prevent the dropout.

In the eighth embodiment, the plate conductor 1
Although the end ring 15 having the axial dimension equal to the protrusion dimension d / 2 of 3'is used, the axial dimension is set as shown in FIGS. 22 and 23 showing the ninth embodiment of the present invention. d / 2
It is also possible to adopt a configuration in which the flattened cylindrical end ring 15 'that is set smaller is used.

According to the ninth embodiment thus constructed,
The plate-shaped conductor 13 'in the assembled state (see FIG. 22)
Since both end portions of are projected from the end ring 15 ', a heat radiation effect can be expected at the protruding portions.

In the ninth embodiment, the plate-shaped conductor 1
The whole 3'is formed longer than the plate-shaped magnetic body 12 to provide the notch 13a. However, as shown in FIG. 24 showing the tenth embodiment of the present invention, a plurality of sheets arranged at predetermined positions are arranged. It is also possible to form only the plate-shaped conductor 13 ′ of the above-mentioned plate longer than the plate-shaped magnetic body 12 and to provide the notch 13 a in these plate-shaped conductors 13 ′.

FIG. 25 shows an eleventh embodiment of the present invention which is a modification of the seventh embodiment, and only the portions different from the seventh embodiment will be described below. That is,
In the eleventh embodiment, the notches formed on the inner peripheral side of the rotor 1 in the state where the plate-shaped conductors 13 'are arranged in the protruding portions from the plate-shaped magnetic body 12 at both ends of the plate-shaped conductor 13'. 1
3b is formed. In this case, the flat-cylindrical end-arm rings 16 and 16 are fitted and fixed to the inner circumferences of the projecting portions at both ends of the plate-shaped conductor 13 '. Therefore, according to the structure of the 11th embodiment, the diameter of the end ring 16 can be reduced.

In the seventh to eleventh embodiments described above, the plate conductor 13 'is longer than the plate magnetic body 12, but the plate magnetic body 12 is longer. It is also possible to adopt a structure that is a measure.

FIG. 26 showing the twelfth embodiment of the present invention.
As described above, the plate-shaped conductor 13 'having the notch 13a employed in the eighth embodiment and the plate-shaped magnetic body 12' having the notch having the same shape as the plate-shaped conductor 13 'are provided. They are arranged alternately and the axial dimension adopted in the ninth embodiment is d.
Alternatively, the end ring 15 'set to be smaller than / 2 may be used. Therefore, according to this configuration,
In the assembled state, both end portions of both the plate-shaped magnetic body 12 'and the plate-shaped conductor 13' project from the end ring 15 '.

In the twelfth embodiment, the plate-shaped magnetic body 1
Notches 12a and 1 are formed in all of 2'and the plate-shaped conductor 13 '.
Although the structure 3a is provided, as shown in FIG. 27 showing the thirteenth embodiment of the present invention, the plate-shaped magnetic body 12 and the plate-shaped conductor 13 having a normal size and the plate-shaped magnetic body 12 'longer than these are provided. It is also possible to adopt a configuration in which the plate conductor 13 'and the plate-shaped conductor 13' are combined.

28 to 30 show a fourteenth embodiment of the present invention, and only the parts different from the sixth embodiment will be described below. That is, in FIGS. 28 to 30,
A large number of plate-shaped magnetic bodies 17 and plate-shaped conductors 18 formed in a strip shape that is long in the axial direction of the rotor core 3 are provided in a number of sheets, and are arranged around the rotor core 3 in the axial direction. They are arranged alternately in a directed state (in FIG. 28, in order to facilitate the distinction between the plate-shaped magnetic body 17 and the plate-shaped conductive body 18, the surface of the plate-shaped magnetic body 17 is provided with a hatched band). (Shown), a pair of end ring 5 is abuttingly fixed to both ends thereof. 28 to 30, the plate-shaped magnetic body 17 and the plate-shaped conductor 18 are drawn in a state in which each thickness dimension (the dimension in the circumferential direction of the rotor 1) is larger than the actual dimension.

In this case, the plate-shaped magnetic body 17 is formed of a grain-oriented electromagnetic steel plate set so that the relative magnetic permeability in the radial direction of the rotor 1 is large, and the plate-shaped conductor 18 is a resistance value. Are formed of a relatively large material. Further, the plate-shaped magnetic body 17 and the plate-shaped conductor 18 are formed such that the cross section of the plane orthogonal to the rotor shaft 2 is rectangular. The plate-shaped magnetic body 1
7 has a thickness dimension of 2 mm or less, and the thickness of the plate-shaped conductor 18 is the same as or smaller than the thickness of the plate-shaped magnetic body 17. Is configured.

In the fourteenth embodiment having such a structure, the same effect as that of the sixth embodiment can be obtained.
In particular, in this embodiment, since the plate-shaped magnetic body 17 and the plate-shaped conductor 18 have a simple shape with a rectangular cross section, they can be easily manufactured and the manufacturing cost can be reduced. There is an advantage that you can.

In the fourteenth embodiment, the plate-shaped magnetic body 17 and the plate-shaped conductor 18 which are separate members are provided, but as shown in the fifteenth embodiment of the present invention shown in FIG. 31,
A plurality of plate-shaped unit members 19 formed by previously stacking the plate-shaped magnetic bodies 17 and the plate-shaped conductors 18 are provided, and these plate-shaped unit members 19 are oriented on the outer peripheral surface of the rotor core 3 in the direction of the rotation axis thereof. It is also possible to arrange the above arrangement.

32 to 37 show a sixteenth embodiment of the present invention, and only the parts different from the sixth embodiment will be described below. In this embodiment, as shown in FIG. 32, a plurality of plate-shaped magnetic bodies 12 in the rotor 1'are provided.
The plate-shaped spacers 20 having a resistance value larger than those of the plate-shaped magnetic body 12 and the plate-shaped conductor 13 are arranged between the plate-shaped conductor 13 and the plate-shaped conductor 13 as the leakage current regulating means. In this case, the plate-shaped spacer member 20 has a strip shape whose vertical and horizontal dimensions are similar to those of the plate-shaped magnetic body 12 and the plate-shaped conductor 13, and is made of a ceramic plate, titanium or nickel alloy, stainless steel or the like. Alternatively, it is formed using a metal plate having an oxide (alumina, iron tetroxide, etc.) formed on the surface. The cross-sectional shape of the plate-shaped spacer member 20 may be either wedge-shaped or rectangular, and as a whole combined with the plate-shaped magnetic body 12 and the plate-shaped conductor 13 provided in large numbers. Any shape may be used as long as it has an annular shape.

The rotor 1'as described above is manufactured through the manufacturing steps described below. In the first step, as shown in FIGS. 33 and 34, a predetermined number of the plate-shaped magnetic bodies 12 are provided on the outer peripheral surface of the cylindrical (cylindrical) jig 21.
The plate-shaped conductor 13 and the plate-shaped spacer member 20 are attached to the jig 2.
By alternately arranging in the state of being directed in the axial direction of 1, the outer cover member 22 having a cylindrical shape as a whole is formed.
In this case, the jig 21 is set to have such a size that both end portions thereof project from both sides of the outer cover member 22 in the axial direction.

Then, in the second step, as shown in FIG.
As shown in FIG. 36, the pair of end ring 5 and the end ring 5 are connected to both ends of the outer cover member 22 in a butt shape, and the integral body of the outer cover member 22 and the end ring 5 is removed from the jig 21. To separate.

In the subsequent third step, as shown in FIG. 37, the integral body of the outer skin member 22 and the end ring 5 is fitted around the rotor core 3, and the rotor core 3 is rotated. The rotor 1'is completed by inserting and connecting the child shaft 2.

In forming the outer skin member 22, the plate-shaped magnetic body 12, the plate-shaped conductor 13 and the plate-shaped spacer member 20 are soldered and bonded to each other by a bonding means using an adhesive, or the like. Alternatively, the outer ends of the plate-shaped magnetic body 12, the plate-shaped conductor 13 and the plate-shaped spacer member 20 are joined to the end rings 5 and 5 by a diffusion bonding means using silver plating or the like. The member 22 is integrated.

According to this embodiment having such a configuration, the plate-like spacer member 2 for obtaining the effect of suppressing the leakage of the induced current is obtained.
Since 0 has the same shape as the plate-shaped magnetic body 12 and the plate-shaped conductor 13, they can be handled equally, and the above-mentioned effect of suppressing the leakage of the induced current can be improved and the assembling workability can be improved. You will be able to gain while improving.

In the sixteenth embodiment, the plate-shaped spacer member 20 is prepared as a component separate from the plate-shaped magnetic body 12 and the plate-shaped conductor 13, but a seventeenth embodiment of the present invention will be described. As shown in FIG. 38, a plurality of conductor unit members 23 (only one is shown) are formed by arranging the plate spacer members 20, 20 on both surfaces of the plate conductor 13 in the circumferential direction of the rotor 1 '. The conductor unit members 23 and the plate-shaped magnetic bodies 12 may be alternately arranged on the outer peripheral surface of the jig 21. According to this embodiment having such a configuration, the plate-shaped conductor 13 and the plate-shaped spacer member 20 can be handled as one component, so that the number of steps required for arranging them can be reduced. Therefore, the assembly workability can be further improved.

FIG. 39 showing the eighteenth embodiment of the present invention.
As described above, a plurality of magnetic body unit members 24 (only one is shown) are provided by arranging the plate spacer members 20, 20 on both surfaces of the plate magnetic body 12 in the circumferential direction of the rotor 1 '. Magnetic body unit member 24 and plate-shaped conductor 13
And may be alternately arranged on the outer peripheral surface of the jig 21. Also in this embodiment having such a configuration, the plate-shaped magnetic body 12 and the plate-shaped spacer member 20 can be handled as one component, and the assembly workability can be further improved.

In the seventeenth and eighteenth embodiments described above, an insulating member may be provided instead of the plate spacer member 20. Particularly, in the seventeenth embodiment,
The conductor unit member is constructed by coating both surfaces of the plate-shaped conductor 13 with an insulating material or adding a sheet made of an insulating material. In the case of the eighteenth embodiment, the plate-shaped magnetic body 12 is used. It is possible to form the magnetic unit member by coating both surfaces with an insulating material, or by additionally attaching a sheet made of an insulating material. In this case, as the above-mentioned insulating material coating means, for example,
A means for forming a silica film by baking and curing a silicon resin varnish or the like may be adopted, and such means can also be applied to the means for forming the insulating film 8 in the second embodiment.

FIG. 40 and FIG. 41 show a nineteenth embodiment of the present invention, and only the parts different from the first embodiment will be described below. That is, this embodiment replaces the plate-shaped unit member 4 of the first embodiment with the unit member 2
The feature is that 5 is provided. This unit member 25
Are plate-shaped spacer members 20, 20 on both sides of the plate-shaped conductor 7.
And the plate-shaped magnetic body 6 is arranged outside the one plate-shaped spacer member 20.

At this time, when the plate-shaped spacer member 20 is a metal (a metal having a resistance value larger than that of the plate-shaped magnetic body 6 and the plate-shaped conductor 7), the unit member 25 is described as follows. It can be manufactured as a clad metal that has undergone various cold compression and drawing processes. That is, FIG.
As shown in FIG. 1, an electromagnetic steel sheet A which is a material of the plate-shaped magnetic body 6
Is wound around a spool RA, a spool RB that is a material of the plate-shaped conductor 7 such as a copper plate B, and two spools R that are wound around a metal plate D that is a material of the plate-shaped spacer member 20.
D and RD are prepared, and electromagnetic steel plate A, copper plate B and metal plates D and D drawn from spools RA, RB and RD are respectively subjected to a degreasing / cleaning process and a surface activating process, and then are pressure-rolled. By performing the pulling out process, as shown in FIG.
The unit member 25 is manufactured by obtaining a semi-finished member E having an end face shape as shown in No. 1 and cutting the semi-finished member E into a strip shape after a diffusion annealing process.

After the above electromagnetic steel sheet A, copper sheet B and metal sheet D are formed in a wedge shape in cross section, degreasing / cleaning step, surface activation step, pressure rolling step, diffusion annealing step and cutting step. By sequentially performing the unit member 25
Can also be manufactured. In addition, for joining the plate-shaped magnetic body 6, the plate-shaped conductor 7 and the plate-shaped spacer member 20, a hot rolling pressure bonding process or a bonding process using an adhesive is used. Manufacturing means can also be adopted. According to the present embodiment configured as described above, the plate-shaped magnetic body 6, the plate-shaped conductor 7, and the plate-shaped spacer member 20 can be handled as one component, so that they are necessary for arranging them. The number of processes has been further reduced,
It will be possible to achieve a great improvement in assembly workability.

42 to 44, a twentieth, a twenty-first and a twenty-second embodiment of the present invention exhibiting the same effect as that of the nineteenth embodiment.
Examples are given. That is, in the twentieth embodiment shown in FIG. 42, in place of the unit member 25, the plate-shaped spacer members 20, 20 are arranged on both sides of the plate-shaped magnetic body 6, and
The structural characteristic is that the unit member 26 configured by disposing the plate-shaped conductor 7 is provided outside the one plate-shaped spacer member 20.

In the twenty-first embodiment shown in FIG. 43, instead of the unit member 25, the plate-shaped spacer members 20, 20 are arranged on both sides of the plate-shaped magnetic body 6, and each plate-shaped spacer member 20 is provided outside. The structural feature is that the unit member 27 configured by arranging the plate-shaped conductors 7 is provided.
In this case, it is desirable that the thickness of the plate-shaped magnetic body 7 be half that of the nineteenth embodiment.

In the twenty-second embodiment shown in FIG. 44, instead of the unit member 25, the plate-shaped spacer members 20, 20 are arranged on both sides of the plate-shaped conductor 7, and the plate-shaped spacer members 20 are arranged outside the plate-shaped spacer members 20. The structural feature is that the unit member 28 configured by arranging the plate-shaped magnetic bodies 6, 6 is provided.
In this case, it is desirable that the thickness of the plate-shaped magnetic body 6 be half that of the nineteenth embodiment.

Furthermore, FIG. 4 showing a twenty-third embodiment of the present invention.
When the unit member 29 as shown in 5 is used, the assembly workability can be expected to be further improved. That is, in the unit member 29 of the twenty-third embodiment, a plurality of, for example, three plate-shaped magnetic bodies 6 and plate-shaped conductors 7 and the same number (6) of plate-shaped spacer members 20 are alternately arranged. And fixed to each other. The fixing as described above may be performed by soldering or an adhering means using an adhesive, but it is formed on the plate-shaped magnetic body 6, the plate-shaped conductor 7 and the plate-shaped spacer member 20, respectively. A fixing means for fitting the projection and the engagement hole to each other (for example, Japanese Patent Application No. 5-186787).
(See the specification and drawings of the issue).

FIG. 46 shows a twenty-fourth embodiment of the present invention, and only the parts different from the sixteenth embodiment will be described below. In the twenty-fourth embodiment, the plate-shaped magnetic body 1
2 and the plate-shaped spacer member 30 having a resistance value larger than that of the plate-shaped conductor 13 is used as the rotor 1 ′ in the plate-shaped conductor 13.
32 (see FIG. 32) and one end face in the radial direction of the rotor 1 '(in this example, the end face on the rotor core 3 side, but the end face on the opposite side is also acceptable) (section U) Character shape). In this case, the plate-shaped conductor 1
The length in the radial direction of the rotor 1 ′ in 3 is required to be smaller than that of the plate-shaped magnetic body 12 by the thickness of the plate-shaped spacer member 30.

According to this embodiment having such a configuration, one end surface of the plate-shaped conductor 13 in the radial direction of the rotor 1'is covered with the plate-shaped spacer member 30 which is a leakage current regulating means. Therefore, the leakage current through the end face can be suppressed, and the operation efficiency can be improved.
In the twenty-fourth embodiment, both end faces of the plate-shaped conductor 13 in the radial direction of the rotor 1'may be covered with a plate-shaped spacer member having a tubular cross section, and the plate-shaped magnetic body 12 may be used. It is also possible to adopt a configuration in which both circumferential surfaces of the rotor 1'and at least one end surface of the rotor 1'in the radial direction are covered with a plate-shaped spacer member.

Further, the same effect can be obtained even if the insulating member is provided in place of the plate-like spacer member 30 in the twenty-fourth embodiment. FIG. 47 shows the present invention adopting such a configuration. A twenty-fifth embodiment is shown.
That is, in the twenty-fifth embodiment, the insulating film 31 as the insulating member is provided on both sides of the plate-shaped conductor 13 in the circumferential direction of the rotor 1'and one end surface in the radial direction of the rotor 1 '(the rotor in this example). It is the end face on the side of the iron core 3, but the end face on the opposite side is also possible)
It is configured to cover. In this case, the insulating film 31
May be formed by the above-mentioned means (coating of an insulating material, baking and curing of a silicon resin varnish, etc.).

Incidentally, also in this embodiment, the plate-shaped conductor 1
3, both end faces in the radial direction of the rotor 1'of FIG.
Alternatively, both surfaces of the plate-shaped magnetic body 12 in the circumferential direction of the rotor 1'and at least one end surface in the radial direction of the rotor 1'may be covered with an insulating film.

FIG. 48 shows a twenty-sixth embodiment of the present invention, and only the parts different from the nineteenth embodiment will be described below. In the twenty-sixth embodiment, the plate-shaped spacer member 2 which constitutes the unit member 25 in the nineteenth embodiment.
A plate-shaped spacer member 32 is provided in place of 0 and 20. The plate-shaped spacer member 32 is provided on both sides of the plate-shaped conductor 7 in the circumferential direction of the rotor 1'and in the radial direction of the rotor 1 '. (A U-shaped cross-section) that covers the end face of the rotor (in this example, the end face on the rotor core 3 side, but the end face on the opposite side is also possible)
Is configured. In the twenty-sixth embodiment as well,
Both end faces of the plate-shaped conductor 7 in the radial direction of the rotor 1 ′ may be covered with a plate-shaped spacer member having a tubular cross-section, and the rotor 1 ′ of the plate-shaped magnetic body 6 in the circumferential direction may be covered. It is also possible to cover both surfaces and at least one end surface in the radial direction of the rotor 1'with a plate-shaped spacer member.

FIG. 49 shows a twenty-seventh embodiment of the present invention, and only the parts different from the twenty-first embodiment will be described below. In the twenty-seventh embodiment, the plate-shaped spacer member 2 which constitutes the unit member 27 of the twenty-first embodiment.
The plate-shaped spacer members 33, 33 are provided in place of 0, 20. Each plate-shaped spacer member 33 has one surface (plate-shaped) of the plate-shaped conductors 7, 7 in the circumferential direction of the rotor 1 '. (A surface on the side of the magnetic body 6) and one end surface in the radial direction of the rotor 1 '(in this example, the end surface on the rotor core 3 side, but the end surface on the opposite side may be used) (a cross section L-shaped). It is configured. In the twenty-seventh embodiment as well, the plate-shaped conductor 7
It is also possible to cover both end surfaces of the rotor 1'in the radial direction of the rotor with a plate-shaped spacer member having a tubular cross-sectional shape, and both sides of the rotor 1'in the plate-shaped magnetic body 6 and the rotor 1 '. ′ At least one end face in the radial direction may be covered with a plate-shaped spacer member having a U-shaped cross section.

FIG. 50 shows a twenty-eighth embodiment of the present invention, and only the parts different from the twenty-second embodiment will be described below. In the twenty-eighth embodiment, the plate-shaped spacer member 2 which constitutes the unit member 28 in the twenty-second embodiment.
The plate-shaped spacer member 34 is provided in place of 0 and 20, and the plate-shaped spacer member 34 is provided on both surfaces of the plate-shaped conductor 7 in the circumferential direction of the rotor 1 ′ and in one of the radial directions of the rotor 1 ′. End face (in this example, the end face on the rotor core 3 side,
It has a shape (a U-shaped cross-section) that covers the end surface on the opposite side. Also in the twenty-eighth embodiment described above, both end faces of the plate-shaped conductor 7 in the radial direction of the rotor 1'may be covered with a plate-shaped spacer member having a tubular cross section, and the plate-shaped magnetic body may be used. Two plate-shaped spacer members having an L-shaped cross-section on one surface in the circumferential direction of the rotor 1 '(surface on the side of the plate-shaped conductor 7) and at least one end surface in the radial direction of the rotor 1'in FIG. It is also possible to use a structure that covers with.

FIG. 51 shows a twenty-ninth embodiment of the present invention, and only the parts different from the twenty-third embodiment will be described below. In the twenty-ninth embodiment, three plate-like spacer members 35 are provided in place of the six plate-like spacer members 20 constituting the unit member 29 in the twenty-third embodiment, and each plate-like spacer member is provided. Reference numeral 35 denotes both surfaces of the plate-shaped conductor 7 in the circumferential direction of the rotor 1'and one end surface in the radial direction of the rotor 1 '(in this example, the end surface on the rotor core 3 side, but the other end surface is also possible. ) Is covered (a U-shaped cross section). Also in the twenty-ninth embodiment described above, both end faces of the plate-shaped conductor 7 in the radial direction of the rotor 1'may be covered by a plate-shaped spacer member having a tubular cross section, and the plate-shaped magnetic body may be used. Rotor 1'in 6
It is also possible to cover both surfaces in the circumferential direction and at least one end surface in the radial direction of the rotor 1'with three plate-shaped spacer members having a U-shaped cross section, and plate-shaped spacer members having other shapes. Is also good to use. In the twenty-sixth to twenty-ninth embodiments described above, the function of the plate-shaped spacer members 32 to 35 may be obtained by an insulating film as an insulating means.

52 and 53 show a thirtieth embodiment of the present invention, and only the portions different from the sixteenth embodiment will be described below. That is, this 30th embodiment
A feature is that a plate-shaped magnetic body 12 ″ is provided in place of the plate-shaped magnetic body 12 in the sixteenth embodiment, and the spacer member 20 is omitted.

52 and 53, the plate-shaped magnetic body 1
2 ″ are projections 12 projecting in the circumferential direction of the rotor 1 ′ (direction close to the plate-shaped conductor 13) at both ends in the radial direction of the rotor 1 ′.
a and 12a are integrally formed. As a result, in the state where a large number of plate-shaped magnetic bodies 12 ″ and plate-shaped conductors 13 are alternately arranged, the leakage current regulating means is provided between the plate-shaped magnetic bodies 12 ″ and the plate-shaped conductors 13 by the projection 12a. The space portion 36 is formed. In this case, an oxide film or another insulating film may be formed on the surface of the plate-shaped magnetic body 12 ″.

According to this embodiment having the above structure,
The protrusion 12a formed in the plate-shaped magnetic body 12 ″ with the space 36 that constitutes the leakage current regulating means for suppressing the leakage of the induced current flowing in the plate-shaped conductor 13 to the plate-shaped magnetic body 12 ″ side.
Therefore, the effect of suppressing the leakage of the induced current as described above can be realized together with the reduction of the number of parts and the cost thereof.

The projection 12a is provided on the plate conductor 13 side.
It is also possible to provide a protrusion having the same shape as the above. In addition, the shape and position of the protrusion for forming the space are the same as those in the third embodiment.
It is needless to say that the present invention is not limited to the zero embodiment, and the projection may be formed by pressing or the like.

Besides, the present invention is not limited to the above-mentioned respective embodiments, and for example, a block iron core may be used as the rotor iron core, or the plate-shaped conductor may be skewed. Various modifications can be made without departing from the scope of the invention.

[0117]

As is apparent from the above description, in the rotor of the rotating electric machine according to claim 1, a plurality of plate-shaped magnetic bodies are provided on the outer peripheral surface of the rotor core so as to be oriented in the axial direction thereof. And by arranging the plate conductors alternately,
Since a slot is formed between each of the plate-shaped magnetic bodies and the plate-shaped conductor is housed in the slot, the thickness of each of the plate-shaped magnetic body and the plate-shaped conductor is measured. In addition, by setting the arrangement pitch of them to a small value, it becomes possible to form an extremely large number of slots in the rotor core. Therefore, it is possible to effectively reduce the magnetic noise even in a situation where the variable frequency power source is used, and it is possible to easily set and change the number of slots, which is an excellent effect.

In the rotor of the rotating electric machine according to the present invention, at least one of the plate-shaped magnetic body and the plate-shaped conductor is formed in a wedge shape in cross section so that the plate-shaped magnetic body and the plate-shaped conductor are wholly formed. Since it was configured to form a ring as
It is possible to prevent an extra gap from being formed between the plate-shaped magnetic body and the plate-shaped conductor, and improve the space factor of the slot (the space factor of the plate-shaped conductor), thereby improving the torque characteristic. Can be planned.

In the rotor of the rotating electric machine according to claim 3, since the plate-shaped magnetic body and the plate-shaped conductor as described above are configured as a plate-shaped unit member that is preliminarily stacked, the plate-shaped magnetic body and the plate-shaped magnetic body are formed. Since the number of steps required for arranging the conductors is reduced, the assembling workability can be improved.

In the rotor of the rotating electric machine according to the present invention, the plate-shaped magnetic body and the plate-shaped conductor are provided with the leakage current regulating means for regulating the leakage current between them. The leakage of the induced current flowing through the conductor is suppressed, and the operating efficiency is improved.

In the rotor of the rotating electric machine according to the fifth aspect, the plate-shaped magnetic body is formed of the electromagnetic steel plate, and the resistance value of the plate-shaped conductor forming the secondary conductor is relatively large. It becomes possible to suppress the eddy current loss and improve the starting characteristics.

According to the rotor of the rotating electric machine of claim 6, the plate-shaped magnetic body is formed of a grain-oriented electrical steel sheet having a large relative permeability in the radial direction of the rotor. With this, it is possible to expect an improvement in efficiency.

In the rotor of the rotating electric machine according to claim 7, the plate-shaped conductor is formed to be longer than the plate-shaped magnetic body, and both end portions thereof are arranged so as to project from the plate-shaped magnetic body. Since the rotor of the rotating electric machine according to claim 8 is configured such that both end portions of at least one of the plate-shaped magnetic body and the plate-shaped conductor protrude from the end ring, a heat dissipation effect at the protruding portion is expected. It will be possible to improve the overall heat dissipation capability.

In the rotor of the rotating electric machine according to claim 9, since the rotor is provided with the reinforcing member in a state of covering the plate-shaped magnetic body and the plate-shaped conductor, the centrifugal force caused by the rotation of the rotor is increased. It is possible to reliably prevent the plate-like magnetic body or the plate-like conductor from falling off due to the force.

In the rotor of the rotating electric machine according to claim 10,
Since the leakage current regulating means is composed of an insulating member interposed between the plate-shaped magnetic body and the plate-shaped conductor, it is possible to enhance the effect of suppressing the leakage of the induced current flowing through the plate-shaped conductor.

In the rotor of the rotating electric machine according to claim 11,
At least one of the end face of the plate-shaped magnetic body in the rotor radial direction and the end face of the plate-shaped conductor in the rotor radial direction is covered with the insulating member according to claim 10, so that leakage current through the end face is prevented. It can be suppressed and the operation efficiency can be improved.

In the rotor of the rotating electric machine according to claim 12,
Since the leakage current regulating means is composed of a plate-shaped spacer member having a resistance value higher than that of the plate-shaped magnetic body and the plate-shaped conductor, the plate-shaped spacer member is made equal to the plate-shaped magnetic body and the plate-shaped conductor. It becomes possible to handle, and it is possible to obtain the effect of suppressing the leakage of the induced current and the improvement of the assembling workability at the same time.

In the rotor of the rotating electric machine according to claim 13,
Since the plate-shaped conductor and the plate-shaped spacer member are configured in advance as a unit unit member for a conductor, the number of steps required for arranging the plate-shaped conductor and the plate-shaped spacer member is reduced, It is possible to further improve the assembly workability.

In the rotor of the rotating electric machine according to claim 14,
Since the plate-shaped magnetic body and the plate-shaped spacer member are configured in advance as a unit member for magnetic body, the number of steps required for arranging the plate-shaped magnetic body and the plate-shaped spacer member is reduced, It is possible to further improve the assembly workability.

In the rotor of the rotating electric machine according to claim 15,
Since the plate-shaped magnetic body, the plate-shaped spacer member, and the plate-shaped conductor are configured as a unit member in advance, the number of steps required to arrange the plate-shaped magnetic body, the plate-shaped spacer member, and the plate-shaped conductor Is reduced and the assembly workability can be greatly improved.

In the rotor of the rotating electric machine according to claim 16,
At least one of the end surface of the plate-shaped magnetic body in the rotor radial direction and the end surface of the plate-shaped conductor in the rotor radial direction will be covered by the plate-shaped spacer member that is the leakage current control means. The leakage current can be suppressed and the operation efficiency can be improved.

According to the rotor of the rotating electric machine of the seventeenth aspect, the space forming the leakage current regulating means can be obtained by the projection formed on at least one of the plate-shaped magnetic body and the plate-shaped conductor. The effect of suppressing the leakage of the induced current as described above can be realized together with the reduction of the number of parts and the cost thereof.

[Brief description of drawings]

FIG. 1 is a perspective view of a rotor according to a first embodiment of the present invention.

FIG. 2 is a transverse sectional view of the rotor.

FIG. 3 is an exploded perspective view showing a state where a part of the rotor is omitted.

FIG. 4 is a cross-sectional view of a plate-shaped unit member.

FIG. 5 is an explanatory diagram of the manufacturing process

FIG. 6 is a transverse sectional view showing a plurality of modified examples of the plate-shaped unit member in the first embodiment.

FIG. 7 is a view corresponding to FIG. 4, showing a second embodiment of the present invention.

FIG. 8 is a perspective view showing a rotor and a reinforcing member (sleeve) according to a third embodiment of the present invention.

FIG. 9 is a perspective view showing a rotor and a reinforcing member (metal plate) according to a fourth embodiment of the present invention.

FIG. 10 is a perspective view showing a rotor and a reinforcing member (wire) according to a fifth embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 3 showing a sixth embodiment of the present invention.

FIG. 12 is a transverse cross-sectional view of the main part of the sixth embodiment.

FIG. 13 is a cross-sectional view showing a modified example of the plate-shaped unit member in the sixth embodiment.

FIG. 14 is a cross-sectional view showing another modification of the plate-shaped unit member in the sixth embodiment.

FIG. 15 is a perspective view of a rotor according to a seventh embodiment of the present invention.

FIG. 16 is a perspective view of a plate-shaped magnetic body and a plate-shaped conductor.

FIG. 17 is an exploded perspective view of essential parts.

FIG. 18 is a perspective view showing a modified example of an end ring in the seventh embodiment.

FIG. 19 is a perspective view of a rotor according to an eighth embodiment of the present invention.

FIG. 20 is a perspective view of a plate-shaped magnetic body and a plate-shaped conductor.

FIG. 21 is an exploded perspective view of essential parts.

FIG. 22 is a perspective view of a rotor according to a ninth embodiment of the present invention.

FIG. 23 is an exploded perspective view of essential parts.

FIG. 24 is an exploded perspective view of essential parts showing a tenth embodiment of the present invention.

FIG. 25 is an exploded perspective view of essential parts showing an eleventh embodiment of the present invention.

FIG. 26 is a perspective view of a rotor according to a twelfth embodiment of the present invention.

FIG. 27 is a perspective view of a rotor according to a thirteenth embodiment of the present invention.

FIG. 28 is a perspective view of a rotor according to a fourteenth embodiment of the present invention.

FIG. 29 is a transverse sectional view of the rotor.

FIG. 30 is an exploded perspective view showing a state where the rotor is partially omitted.

FIG. 31 is a transverse sectional view of a plate-shaped unit member showing a fifteenth embodiment of the present invention.

FIG. 32 is a perspective view of a rotor according to a sixteenth embodiment of the present invention.

FIG. 33 is a perspective view showing a state in which the rotor is being manufactured, part 1

FIG. 34 is a perspective view showing a state in which the rotor is being manufactured, part 2

FIG. 35 is a perspective view showing a state in which the rotor is being manufactured, part 3

FIG. 36 is a perspective view showing a state in which the rotor is being manufactured, part 4

FIG. 37 is a perspective view showing a state in which the rotor is being manufactured,

FIG. 38 is a perspective view of the essential parts showing a seventeenth embodiment of the present invention.

FIG. 39 is a perspective view of the essential parts showing the eighteenth embodiment of the present invention.

FIG. 40 is a perspective view of essential parts showing a nineteenth embodiment of the present invention.

FIG. 41 is an explanatory view of the manufacturing process

FIG. 42 is a perspective view of essential parts showing a twentieth embodiment of the present invention.

FIG. 43 is a perspective view of essential parts showing a twenty-first embodiment of the present invention.

FIG. 44 is a perspective view of essential parts showing a twenty-second embodiment of the present invention.

FIG. 45 is a perspective view of the essential parts showing a twenty-third embodiment of the present invention.

FIG. 46 is a perspective view of essential parts showing a twenty-fourth embodiment of the present invention.

FIG. 47 is a perspective view of the essential parts showing a twenty-fifth embodiment of the present invention.

FIG. 48 is a perspective view of essential parts showing a twenty-sixth embodiment of the present invention.

FIG. 49 is a perspective view of the essential parts showing the 27th embodiment of the present invention.

FIG. 50 is a perspective view of essential parts showing a twenty-eighth embodiment of the present invention.

FIG. 51 is a perspective view of essential parts showing a twenty-ninth embodiment of the present invention.

52 is a perspective view of the essential parts showing the thirtieth embodiment of the present invention. FIG.

FIG. 53 is a partial cross-sectional view of the rotor

[Explanation of symbols]

In the figure, 1 and 1'is a rotor, 2 is a rotor shaft, 3 is a rotor core, 4 and 19 are plate-shaped unit members, 5, 14, 15 and 1
5 ', 16 are end ring, 6, 6', 12, 12 ', 1
2 ″ and 17 are plate-like magnetic bodies, 12a is a protrusion, 7, 7 ′ and 1
3, 13 'and 18 are plate-shaped conductors, 8 and 31 are insulating films (insulating members), 9 is a sleeve (reinforcing member), 10 is a metal plate (reinforcing member), 11 is a wire (reinforcing member), 20, Three
0, 32, 33, 34, 35 are plate-like spacer members, 23
Is a conductor unit member, 24 is a magnetic plate member, 2
5, 26, 27, 28 and 29 are unit members, and 36 is a space (leakage current regulating means).

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takeshi Yagisawa 4-2 Suehirocho, Tsurumi-ku, Yokohama Inside the Keihin office of Toshiba Corp. (72) Inventor Shigeo Ozawa 2121 Hajio, Asahi-cho, Mie-gun, Mie Prefecture Company Toshiba Mie factory

Claims (17)

[Claims] 1. A rotor of a rotary electric machine comprising a rotor core rotatably supported in a stator, wherein the rotor core has an outer peripheral surface directed in the axial direction thereof and having a predetermined distance between them. A plurality of plate-shaped magnetic bodies arranged so as to exist, and a plurality of plate-shaped magnetic bodies arranged so as to be oriented in the axial direction on the outer peripheral surface of the rotor iron core and located between the plate-shaped magnetic bodies. A rotor for a rotating electric machine, comprising: a conductor; and a pair of end ring connected to both ends of the plate-shaped conductor group. 2. At least one of the plate-shaped magnetic body and the plate-shaped conductor is formed in a wedge shape in which a cross-sectional shape of a surface orthogonal to the rotor axis becomes narrower toward the rotor shaft side. The rotor of a rotary electric machine according to claim 1, wherein the plate-shaped magnetic body and the plate-shaped conductor are configured so as to form an annular shape as a whole. 3. A plurality of plate-shaped unit members formed by stacking plate-shaped magnetic bodies and plate-shaped conductors in advance are provided, and these plate-shaped unit members are oriented in the axial direction on the outer peripheral surface of the rotor core. The rotor of the rotating electric machine according to claim 1 or 2, wherein the rotor is arranged in a line. 4. The leakage current regulating means for regulating the leakage current between the plate-shaped magnetic body and the plate-shaped conductor is provided between the plate-shaped magnetic body and the plate-shaped conductor. The rotor of the rotating electric machine according to 1. 5. The plate-shaped magnetic body is formed of an electromagnetic steel plate,
The rotor of a rotary electric machine according to claim 1, 2 or 3, wherein the plate-shaped conductor is formed of a conductive material having a relatively large resistance value. 6. The rotating member according to claim 5, wherein the plate-shaped magnetic body is formed of a grain-oriented electrical steel sheet set to have a large relative magnetic permeability in the radial direction of the rotor. Electric motor rotor. 7. The plate-shaped conductor is formed to be longer than the plate-shaped magnetic body, and is arranged such that both end portions project from the plate-shaped magnetic body. The rotor of the rotating electric machine according to 1. 8. The rotating electric machine according to claim 1, 2 or 3, wherein both end portions of at least one of the plate-shaped magnetic body and the plate-shaped conductor are configured to project from the end ring. Rotor. 9. The rotating electric machine according to claim 1, 2 or 3, wherein the rotor is provided with a reinforcing member covering the plate-shaped magnetic body and the plate-shaped conductor. Child. 10. The rotor of a rotary electric machine according to claim 4, wherein the leakage current regulating means is an insulating member interposed between the plate-shaped magnetic body and the plate-shaped conductor. 11. The insulating member is configured to cover at least one of an end surface of the plate-shaped magnetic body in the rotor radial direction and an end surface of the plate-shaped conductor in the rotor radial direction. The rotor of the rotating electric machine according to 10. 12. The rotor of a rotating electric machine according to claim 4, wherein the leakage current regulating means is a plate-shaped spacer member having a resistance value higher than those of the plate-shaped magnetic body and the plate-shaped conductor. 13. A plurality of conductor unit members in which plate spacer members are arranged on both sides of a plate conductor in the rotor circumferential direction, and the conductor unit members and a plurality of plate magnetic members are provided. The rotor of a rotating electric machine according to claim 12, wherein the rotor core is arranged on an outer peripheral surface of the rotor core so as to be oriented in an axial direction thereof. 14. A plurality of magnetic body unit members in which plate spacer members are arranged on both surfaces of a plate magnetic body in the circumferential direction of the rotor are provided, and the magnetic body unit member and a plurality of plate conductors are provided. The rotor of a rotating electric machine according to claim 12, wherein the rotor core is arranged on an outer peripheral surface of the rotor core so as to be oriented in an axial direction thereof. 15. A plurality of unit members each having a plate-shaped magnetic body, a plate-shaped spacer member and a plate-shaped conductor alternately arranged in advance are provided, and these unit members are provided on the outer peripheral surface of the rotor core in the axial direction thereof. The rotor of a rotating electric machine according to claim 12, wherein the rotor is arranged so as to be oriented. 16. The plate-shaped spacer member is configured to cover at least one of an end surface of the plate-shaped magnetic body in the rotor radial direction and an end surface of the plate-shaped conductor in the rotor radial direction. The rotor of a rotary electric machine according to claim 12. 17. A projection formed in at least one of a plate-shaped magnetic body and a plate-shaped conductor in such a manner that the projection protrudes in a direction in which the plate-shaped magnetic body and the plate-shaped conductor are adjacent to each other. The rotor of the rotating electric machine according to claim 4, wherein the space portion is configured to be used as a leakage current regulating unit.