JP2000023394A - Armature structure for toroidally wound rotary electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make the best use of a space in the height direction and at the same time, to sharply improve the value of the proportionality constant which decides the relation between torque and copper losses by combinedly using toroidal winding and a magnetism collecting yoke. SOLUTION: A plurality of rib-like core sections 6 are integrally formed with the annular core section 5 of a laminated core forming a stator 2, in such a way that the core sections 6 radially extend at prescribed intervals in the peripheral direction. Then a coil 8 is wound around the annular core section 5 in each slot formed between a pair of core sections 6 which are arranged adjacent in the peripheral direction. In addition, a magnetism collecting yoke section 13 is formed by bending each two core pieces at both end sections of the laminated core in the laminating direction (axial direction) which is nearly perpendicularly to the axial direction. Moreover, the total facing height (thickness) of the yoke section 13 and its counter core section 9 in the axial direction (laminating direction) is made higher than the core height (thickness) of the annular core section 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an armature structure of a toroidal winding type rotating electric machine in which a plurality of coils are mounted on an annular core portion of a laminated core at predetermined intervals.

[0002]

2. Description of the Related Art In general, a rotating electric machine requiring a sine waveform magnetic field in an air gap portion employs a winding method called distributed winding. For example, in the three-phase induction motor shown in FIG. 12, a stator S is arranged so as to surround an outer peripheral side of a rotor R, and a slot is provided with respect to a laminated core SC of an armature constituting the stator S. The coils are wound such that the coils SL are superimposed while displacing the coils. However, in this method, the coil SL
, The windings are difficult, the winding length is long, and the winding height H1 is high, resulting in an increase in size.

[0003] On the other hand, a method called toroidal winding in which winding is performed on a core annular portion is known. This toroidal winding method has excellent features such as easy winding because the coils do not overlap, shortening the winding length, and preventing the winding height from increasing.

[0004]

However, in the conventional toroidal winding type rotating electric machine, the characteristics are inferior to those of the general distributed winding except for the flat type, and the application is limited to some fields. Is the current situation. On the other hand, in recent years, global environmental problems have become serious, and energy saving and power saving must be promoted with the highest priority. Today, power consumption is dominant, but more than half of the total power is consumed by motors. For this reason, increasing the efficiency of the motor and reducing the loss (power consumption) as much as possible are demanded as top priorities. The same applies to the generator that generates electric power.

[0005] Therefore, the present invention provides an armature of a rotary electric machine in which the efficiency value is greatly improved by making a structural change for improving the characteristics of the armature structure of the toroidal-wound rotary electric machine excellent in the winding method. It is intended to provide a structure.

[0006]

The present invention relates to a structure for improving the characteristics of a rotating electric machine including a motor and a generator. A motor converts electric energy into mechanical energy, and converts mechanical energy into electric energy. The generator is converted into the motor, and the motor and the generator are basically the same (structure and configuration). Therefore, it is possible to use the motor as a generator or to use the generator as a motor. Therefore, all of the following description will be made using the motor.

In general, output and torque are used as indices representing motor characteristics. However, since these vary depending on the applied voltage, the number of windings of the windings, heat radiation conditions and design, the absolute values of the motor characteristics are changed. It is not an index represented by. On the other hand, there is an efficiency value as another index, which is a good index indicating the relationship between the output and the loss. However, it changes depending on the load or rotation speed condition, and the output becomes 0 and the efficiency value becomes 0 under the starting condition.
Therefore, it cannot be an absolute index indicating the magnitude of the motor characteristic.

Therefore, in order to improve the motor efficiency value, it is basically necessary to accurately grasp what the motor characteristics and the magnitude of the efficiency are and what they determine.
As a result of the study by the present inventors, the following has been found. The absolute index representing the magnitude of the motor characteristic is a proportional constant value (determining) the relationship between the generated torque and the generated loss (copper loss). For a motor without a magnet, this proportionality constant = torque / copper loss. For a motor with a magnet, this proportionality constant = (torque) ²
/ Copper loss. The so-called proportional constant value, which represents the relationship between the torque and the copper loss generated when a certain current flows, does not change even when the applied voltage, the number of winding turns (when the space factor is the same), and the load conditions are changed. Thus, it can be seen that it is an absolute index indicating the magnitude of the motor characteristics. On the other hand, regarding the efficiency value, efficiency = output / input = output / (output + loss)
Output = rotational speed × torque, the rotational speed is the applied voltage and loss, and the main loss is copper loss.

Enhance motor characteristics (increase efficiency)
For this reason, attempts have been made to increase the size of the magnet, use a high-energy product magnet, or increase the space factor of the winding.However, these factors eventually change the conditions of the factors that determine the proportional constant value. It is obtained by:

Next, the reason why the proportional constant value determines the absolute value of the motor characteristics and the factor that determines the proportional constant value will be described. The torque of the motor is determined by the magnitude of the change in magnetic energy due to the relative movement between the opposed primary and secondary sides. There are two types of magnetic energy generated and held by the primary and secondary side self inductances L and those generated and held by the mutual inductance M between the primary side and the secondary side. The magnetic energy used for the drive differs depending on the type and structure. Induction motors, DC motors, brushless motors and the like use magnetic energy due to mutual inductance M, and reluctance motors use magnetic energy due to self inductance L.

When the structure such as the number of magnetic poles is fixed,
The magnitude of the generated torque with respect to the secondary side and secondary side currents I ₁ and I ₂ is substantially determined by the maximum value of the magnetic energy, and is determined by the so-called self-inductance L and mutual inductance M. The magnitude of the magnetic energy due to the self-inductance L is (１ ／) · L · I ² , and the magnitude of the magnetic energy due to the mutual inductance M is M ·
I ₁ · I ₂ . Most general motors other than the reluctance motor use the mutual inductance M for driving. In many motors that do not use magnets, such as induction motors and universal motors, the primary current I ₁ and the secondary current I ₂ are proportional, so if the current is represented by I, the magnetic energy is M · I ₁ · I ₂ = M · ^{I 2} and expressed. In the case of a motor using a magnet on one side (assumed to be a primary side), I ₁ is fixed because the magnet is a current-fixed electromagnet. Since M · I ₁ = Φ (effective magnetic flux), the magnetic energy is M・ I ₁・ I
₂ = Φ · I.

On the other hand, since copper loss is resistance loss, R · I ²
Can be represented by Therefore, the proportionality constant that determines the relationship between torque and copper loss is represented by torque / copper loss without a magnet, and can be expressed as L / R or M / R as a result. In the case with the magnet, since (torque) ² / copper loss, M
It can be expressed as ² / R.

Considering the factors that determine L, M, and R, the number of coil turns has the same effect on all of them, and when excluding it, L and M are mainly the primary and secondary facing areas S and It can be expressed by the air gap length g. If a magnet is provided, it further includes the material, physique and shape of the magnet. R is mainly determined by the coil cross-sectional area A and the coil length l per turn of the coil. Considering that the air gap length g and the magnet element are almost fixed, and considering the configuration of the above-mentioned proportional constant only with the main element, the following is obtained. a. Motor without magnet (induction, universal): SA
/ L = S / coil element b. Motorized ^{magnet: S 2 · A / l =} S 2 / coil elements c. Reluctance motor: S · A / l = S / coil element As described above, if the main factors constituting the proportional constant are improved and the proportional constant value is increased, the motor characteristics are increased, and as a result, the efficiency value can be improved. I understand.

[0014] From the viewpoint of the above proportional constant value, it can be seen that the conventional rotary electric machine has a major drawback. In other words, a common matter that determines the upper side of the above-described constitutive equation of the proportional constant is the area S of the primary and secondary magnetic facing surfaces. As the facing area S increases, the proportional constant value and the efficiency value may increase. Understand. However, as can be easily understood from the example of the three-phase induction motor (see FIG. 12), which is a typical rotary electric machine described above, the height H3 of the primary and secondary magnetic facing portions with respect to the overall height H2 of the motor in the axial direction. Is extremely small. This corresponds to the winding height H, as described above.
This is because a lot of the axial space is taken in 1
As a result, the above-described area S of the magnetic facing portion is very small.

Assuming that the magnetic facing surface can be taken up to the full motor space in the axial direction without changing the condition of the coil element, the proportional constant value is greatly improved, and the loss at the same torque (or output) is reduced. Is easily reduced to, for example, 1/2 or 1/3. Such a temporary state is possible to some extent if only the structure for that is considered. That is, it is structurally possible to greatly increase the height of the primary and secondary magnetic facing surfaces without significantly deteriorating the coil element, and by adopting such a structure, the efficiency value is greatly increased. That is, the loss can be significantly reduced.

From such a viewpoint, in the invention according to the first aspect, the armature constituting at least one member of the stator or the rotor includes an annular core portion and a portion extending from the annular core portion to the other member. An opposing core portion extending in the armature structure of a toroidal winding type rotating electric machine in which a coil is toroidally wound around an annular core portion of the laminated core, wherein at least the opposing core of the armature is provided. A magnetic flux collecting yoke portion made of a plate-like member that enlarges the area facing the other side member so as to increase the core height of the facing core portion, and the magnetic flux collecting yoke portion and the facing core portion are provided. Is formed to be larger than the core height of the annular core portion.

In the invention according to claim 2, the magnetic flux collecting yoke portion according to claim 1 is configured to bend a plurality of core pieces disposed at both ends in the laminating direction of the laminated core in the laminating direction at a substantially right angle. It is formed.

Further, according to the third aspect of the present invention, the laminated core according to the first aspect is provided with a protruding portion which protrudes from the annular core portion in a radial direction on a side opposite to the opposing core portion.

Further, in the invention according to claim 4, the overhang portion according to claim 3 is in contact with the support frame so as to position the armature.

On the other hand, in the fifth aspect of the present invention, the contact area of the overhang portion with the support frame according to the fourth aspect is smaller than the cross-sectional area of the other portion of the overhang portion.

According to a sixth aspect of the present invention, an auxiliary yoke portion is provided between the magnetic flux collecting yoke portion and the annular core portion to increase the cross-sectional area of the magnetic flux.

Further, in the invention according to claim 7, the laminated core and the magnetic flux collecting yoke according to claim 1 are made of a silicon steel plate.

Further, in the invention according to claim 8, the surface of the facing core portion facing the other side member in the above-mentioned claim 1 has a total width obtained by summing the circumferential width of the facing surface over the entire circumference. 0.8 or more with respect to the entire circumference passing through the surface.
It is formed so as to have a ratio of less than 0.

Further, in the invention according to claim 9, the armature according to claim 1 is a stator of an induction machine.

According to the tenth aspect, the first aspect
The described armature is a rotor of an induction machine.

According to the eleventh aspect of the present invention, in the armature according to the tenth aspect, an aluminum material forming part or all of the conductive portion is filled by die casting in a portion radially inside the opposed core portion. Have been.

Further, in the twelfth aspect of the present invention, a cylindrical ring-shaped copper material is provided on a portion of the annular core portion in the radially opposite side of the opposed core portion of the annular core portion as a part of the conductive portion. I have.

Furthermore, in the invention according to claim 13,
All of the conductive portions of the armature according to claim 10 are made of a copper material.

According to the fourteenth aspect, the first aspect
The armature described is an AC magnet synchronous machine or an AC reluctance synchronous machine stator.

Further, in the invention according to claim 15, the rotating electric machine according to claim 1 has an inner rotor structure.

Further, according to the sixteenth aspect of the present invention, the rotating electric machine according to the first aspect has an outer rotor structure.

Further, according to the seventeenth aspect of the present invention,
2. A single phase coil according to claim 1, wherein:
Winding is provided to be accommodated in one slot.

According to the eighteenth aspect of the present invention, the first aspect is provided.
7. The rotor constituting the other member according to 7 is a field magnet type structure or a reluctance type structure.

By using a combination of a toroidal winding and a magnetic flux collecting yoke as in the present invention, the space in the height direction, which is a drawback of the conventional structure, can be maximized and the coil element can be deteriorated. Therefore, the value of the proportional constant is greatly improved, and as a result, the loss is greatly reduced, and the efficiency value is dramatically improved.

More specifically, the following operation is obtained. First, by adopting the toroidal winding structure, the slit width of the facing surface of the slot, which was widely required for the winding, may be reduced, and the facing area can be improved while reducing the higher-order torque. Further, the space factor, which has been difficult even if the winding method is conventionally improved, can be easily improved. Further, since there is no overlapping portion of the windings, it is easy to cope with a design in which the cross-sectional area of the windings is increased.
The coil length per turn is also reduced.

Next, the structure in which the magnetic flux collecting yoke is provided enables the space in the height direction of the motor to be fully used as the magnetic facing surface. In spite of that, there is almost no influence on the winding and the coil element is not deteriorated. Conversely, the drawbacks of the conventional toroidal winding structure, such as increasing the core height, increasing the coil length per turn, and reducing the winding space due to the width of the core ribs are alleviated. The direction can be improved by combining with the magnetic yoke structure.

At this time, if an auxiliary yoke for enlarging the passage area of the magnetic flux is provided in the rib-shaped core between the magnetic flux collecting yoke and the annular core, the same magnetic path disconnection can be obtained even if the rib width is reduced. The area can be secured, and as a result, the winding space can be increased.

Further, if the laminated core is extended in the radial direction and extended, the flow of magnetic flux in the laminated (axial) direction becomes smooth, the fixing strength of the laminated core is increased, and the laminated core is fixed to the outer frame. Positioning is also facilitated.

Further, the above-described magnetic flux collecting yoke according to the present invention can be easily formed in the process of laminating the cores. Further, when such a magnetic flux collecting yoke portion is provided, it is conceivable that a space between adjacent magnetic flux collecting yoke portions becomes narrow and winding becomes difficult. By combining with a wire structure, even a winding operation such as passing between narrow magnetic flux collecting yokes can be easily performed.

[0040]

Embodiments of the present invention will be described below in detail with reference to the drawings. First, the embodiment shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4 applies the present invention to a stator (stator) and a rotor (rotor) in an induction motor. A stator 2 mounted on an inner peripheral wall of a child frame (case) 1 is arranged so as to surround an outer peripheral side of a rotor 4 fixed to a rotating shaft 3. A plurality of rib-shaped core portions 6 are integrally provided on the annular core portion 5 of the laminated core forming the stator 2 so as to extend radially at predetermined intervals in the circumferential direction. A coil 8 is attached to the annular core portion 5 by so-called toroidal winding inside each of the slots 7 defined between a pair of circumferentially adjacent ones of the rib-shaped core portions 6. ing. An opposing core portion (magnetic pole portion) 9 facing the rotor 4 is provided at a radially inner end portion of each of the rib-shaped core portions 6.

The laminated core is formed by laminating a thin plate-shaped core piece obtained by punching a silicon steel sheet into a predetermined shape in the axial direction, and is composed of a laminated body of core pieces 11 as shown in FIG. Have been. That is, the laminated body of the core pieces 11 has a portion 11a forming the above-described annular core portion 5.
A portion 11b forming a rib-shaped core portion 6 extending radially from the annular core portion 5, and a portion 11c forming an opposing core portion 9 provided at an inner end portion of the rib-shaped core portion 6
By annularly stacking a predetermined number of such core pieces 11 in the axial direction, an annular core portion 5, a rib-shaped core portion 6, and a facing core portion 9 having a predetermined height are formed. ing. Then, the annular core portion 5 in which the core pieces 11 are laminated
The coil 8 is toroidally wound.

On the other hand, the laminating direction (axial direction) of the laminated core
Each of the two core pieces 11 disposed at both ends is bent substantially at right angles in the axial direction at a portion corresponding to the opposing core portion 9 to form the magnetic flux collecting yoke portion 13. The magnetic flux collecting yoke portion 13 extends in the axial direction, thereby increasing the area of the facing core portion 9 facing the rotor 4 in the axial direction. The total opposing height (thickness) in the axial direction (stacking direction) of the magnetic flux collecting yoke portion 13 and the opposing core portion 9, that is, the total core height is the core height of the annular core portion 5. Thickness). The total core height, which is the total opposing height of the opposing core portion 9 and the magnetic flux collecting yoke portion 13, is formed to have a height greater than the axial winding height of the coil 8.

As will be described later, the core height (thickness) in the axial direction (stacking direction) on the facing surface on the rotor 4 side.
Is formed to be larger than the core height (thickness) of the annular core portion 5 and is substantially equal to the total core height of the magnetic flux collecting yoke portion 13 and the opposing core portion 9 described above.
Accordingly, the entire height of the magnetic flux collecting yoke 13 is
It faces the rotor 4 side.

The laminated core forming the rotor 4 is also
It has the same configuration as the laminated core in the stator 2 described above, and particularly, as shown in FIG.
A plurality of rib-shaped core portions 16 are integrally provided on the annular core portion 15 so as to radially extend at predetermined intervals in the circumferential direction. A conductive portion (not shown) formed by aluminum die-casting is provided in each of the slots defined between a pair of circumferentially adjacent ones of the rib-shaped core portions 16. Is configured to be filled. In addition, each of the rib-shaped core portions 16
Is provided with a facing core portion 17 facing the stator 2 at the radially outer end portion.

A cylindrical ring-shaped copper plate 18 is arranged on the inner peripheral side of the aluminum die-cast portion of the conductive portion, that is, on the end opposite to the opposite core portion 17 in the radial direction so as to form the conductive portion. As a result, good conductivity is obtained. In order to increase the conductivity of the conductive portion, a rod-shaped copper material can be inserted into each slot, or the entire conductive portion can be made of a copper material.

The laminated core of the rotor 4 is formed by axially laminating core pieces obtained by punching a silicon steel sheet into a predetermined shape, and is a laminate of core pieces 11 having a shape substantially corresponding to FIG. It is composed of That is, the core piece 11
The laminated body has a portion forming the above-described annular core portion 15, a portion forming the rib-shaped core portion 16 extending radially from the annular core portion 15, and an inner end portion of the rib-shaped core portion 16. And a portion forming an opposed core portion (magnetic pole portion) 17 provided. When a predetermined number of such core pieces 11 are stacked in the axial direction, an annular core having a predetermined height is formed. A portion 15, a rib-shaped core portion 16, and a facing core portion (magnetic pole portion) 17 are formed.

On the other hand, the laminating direction (axial direction) of the laminated core
At each of both end portions, two core pieces 11
Are bent substantially at right angles in the axial direction in a portion corresponding to the opposing core portion 17. As described above, the axially bent portion constitutes the magnetic flux collecting yoke portion 21 for increasing the area facing the stator 2 in the axial direction, and includes the magnetic flux collecting yoke portion 21 and the facing core portion 17. The total opposing height (thickness) in the axial direction (lamination direction), that is, the total core height, is greater than the core height (thickness) of the annular core portion 15.

At this time, the core pieces 11 constituting the magnetic flux collecting yokes 13 and 21 in the stator 2 and the rotor 4 are used.
In this case, a silicon steel sheet having no insulating film is used as necessary. When a silicon steel sheet is used, the flow of magnetic flux in the laminating direction (axial direction) is improved.

The core pieces 11 constituting the magnetic flux collecting yokes 13 and 21 may be formed so that a plurality of insulating slits extend as required. The insulating slit has an insulating function of suppressing generation of eddy current generated by magnetic flux passing through the magnetic flux collecting yokes 13 and 21 in the stacking direction (axial direction).

Returning to FIGS. 1 to 4 again, the laminated core of the stator 2 has a protruding core portion 25 projecting radially outward from the annular core portion 5. The radially outer end of the protruding core portion 25 is arranged so as to be in contact with the stator frame 1, thereby fixing the entire stator.

At this time, when the stator frame 1 is made of a magnetic material such as an iron material, as shown in FIG.
If the cross-sectional area of the overhanging core portion 25 is formed so as to be reduced at a portion in contact with the stator frame 1, leakage of magnetic flux is reduced, which is convenient.

Further, on the opposing surfaces of the stator 2 and the rotor 4 in the opposing core portions 9 and 17 with the other member, the total width in the circumferential direction of each opposing surface is equal to the total width over the entire circumference. Are formed so as to have a ratio of 0.8 or more and less than 1.0 with respect to the entire circumferential length passing through the opposing surface, thereby increasing the mutual opposing area.

Although the embodiments of the present invention made by the inventor have been specifically described above, the present invention is not limited to the above-described embodiments, and can be variously modified without departing from the gist thereof. Needless to say.

For example, in the embodiment shown in FIG. 8, an auxiliary yoke portion 26 for increasing the passage area of the magnetic flux is provided between the magnetic flux collecting yoke portion 13 and the annular core portion 5 in the above-described embodiment. ing. This auxiliary yoke portion 26
Both widthwise edges of the rib-shaped core portion 6 are bent at substantially right angles in the axial direction to be erected, and by forming such an auxiliary yoke portion 26, the magnetic flux collected by the magnetic flux collecting yoke portion is reduced. If the passage area is enlarged to allow a structure to flow as much magnetic flux as possible, a predetermined magnetic path cross-sectional area can be secured even if the rib width of the rib-shaped core portion 6 is reduced, and as a result, the winding space is reduced. It is possible to increase.

Although not shown, the magnetic flux collecting yoke formed on the opposed core portion of the stator includes, in addition to the radially opposed surface facing the rotor in the radial direction, the axially opposed surface facing the rotor in the axial direction. May be provided to increase the facing area. At this time, the axially facing surface of the magnetic flux collecting yoke portion can have its facing area enlarged by increasing its area in the circumferential or radial direction. A pair of axially facing surfaces of the magnetic flux collecting yoke are provided, for example, so as to sandwich the rotor in the axial direction. In this case, an axially facing surface may be provided on the rotor side.

FIG. 9 shows the present invention applied to an armature of an AC synchronous machine. An armature 35 is provided so as to face a field magnet 36 in a radial direction.

Further, in the embodiment shown in FIG. 10, the present invention is applied to an armature of an AC reluctance synchronous machine, and an armature 37 is opposed to an iron core 38 in a radial direction. It is provided as follows.

Further, in each of the embodiments described above, the inner rotor type is configured, but the outer rotor type can also be configured.

In the rotary electric machine according to the embodiment shown in FIG. 11, the armature 40 has the three-phase U, V, and W-phase coils 41 housed in one slot one by one in order. Although each phase coil is formed so as to generate a rectangular magnetic field having the same cycle as the magnetic pole pitch, the present invention can be similarly applied to a rotating electric machine having such a configuration.

On the other hand, the present invention can be similarly applied to a so-called face-to-face rotating electric machine, in which case, for example, the member facing the other side in the axial direction. The uppermost core is formed in the magnetic flux collecting yoke.

Further, the present invention is not limited to the motor as in each of the above-described embodiments, and can be similarly applied to a generator.

[0062]

As described above, according to the present invention, by using the toroidal winding and the magnetic flux collecting yoke in combination, the space in the height direction, which is a drawback of the conventional structure, can be maximized. Because the coil element does not deteriorate, the proportional constant value that determines the relationship between torque and copper loss is greatly improved, and the loss is greatly reduced, dramatically improving the efficiency and characteristics of the rotating electric machine. Can be done.

[Brief description of the drawings]

FIG. 1 is a schematic semi-longitudinal sectional view showing the structure of a toroidal wound induction motor according to an embodiment of the present invention.

FIG. 2 is a schematic cross-sectional view of the toroidal winding type induction motor shown in FIG.

FIG. 3 is an external perspective explanatory view showing a structure of a stator in FIGS. 1 and 2;

4 is an external perspective explanatory view showing a laminated core structure of the stator shown in FIG. 3;

FIG. 5 is an explanatory plan view showing the shape of a core piece constituting the laminated core shown in FIGS. 3 and 4;

FIG. 6 is an external perspective explanatory view schematically showing the structure of a rotor used in the toroidal winding type induction motor shown in FIGS. 1 and 2;

FIG. 7 is an explanatory partial plan view showing an example of a stator fixing structure.

FIG. 8 is a partial external perspective explanatory view showing an example of an auxiliary yoke portion formed on a core piece.

FIG. 9 is a schematic longitudinal sectional view illustrating an embodiment in which the invention is applied to a magnet synchronous machine.

FIG. 10 is a schematic longitudinal sectional view illustrating an embodiment in which the invention is applied to a reluctance type rotating electric machine.

FIG. 11 is a schematic plan view showing an embodiment in which a coil according to the present invention is concentratedly wound.

FIG. 12 is an explanatory longitudinal sectional view showing a structural example of a general rotating electric machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stator frame 2 Stator 3 Rotating shaft 4 Rotor 5 Annular core part 6 Rib-shaped core part 7 Slot 8 Coil 9 Opposing core part 11, 12 Laminated core silicon steel plate 13 Magnetic collecting yoke part 15 Annular core part 16 Rib-shaped core Part 17 Opposed core part 18 Copper plate 21 Magnetic flux collecting yoke part 25 Overhang core part 31 Stator 36 Field magnet 38 Iron core 43 43 Opposed core part

Claims (18)

[Claims] An armature constituting at least one member of a stator or a rotor includes an annular core portion and an opposing core portion extending from the annular core portion toward the other member. The armature structure of a toroidal rotary electric machine in which a coil is toroidally wound around an annular core portion of the laminated core, wherein at least a facing core portion of the armature has a facing area with the other member. A magnetic flux collecting yoke portion made of an expanding plate-shaped member is provided so as to increase the core height of the opposed core portion, and the total facing height of the magnetic flux collecting yoke portion and the opposed core portion is the annular core portion. An armature structure for a toroidal wound rotary electric machine, wherein the armature is formed to be larger than the core height of the core. 2. The magnetic flux collecting yoke portion is formed by bending a plurality of core pieces disposed at both ends of a laminated core in a laminating direction in a laminating direction at a substantially right angle. An armature structure of the toroidal-wound rotary electric machine described. 3. The toroidal rotary electric machine according to claim 1, wherein the laminated core has a projecting portion protruding from an annular core portion in a radial direction on a side opposite to the opposing core portion. Armature structure. 4. The armature structure of a toroidal-wound rotary electric machine according to claim 3, wherein the overhang portion is in contact with a support frame so as to position the armature. 5. The electric machine for a toroidal wound rotary electric machine according to claim 4, wherein a contact area of the overhang portion with the support frame is smaller than a cross-sectional area of another portion of the overhang portion. Child structure. 6. A toroidal-wound rotary electric machine according to claim 1, wherein an auxiliary yoke portion for increasing a cross-sectional area of a magnetic flux is provided between said magnetic flux collecting yoke portion and said annular core portion. Armature structure. 7. The armature structure for a toroidally wound rotary electric machine according to claim 1, wherein the laminated core and the magnetic flux collecting yoke are made of a silicon steel plate. 8. The facing surface of the opposed core portion facing the other member has a total width obtained by adding the circumferential width of the facing surface over the entire circumference to 0.8 or more with respect to the entire circumferential length passing through the facing surface. The armature structure for a toroidal-wound rotary electric machine according to claim 1, wherein the ratio is less than 1.0. 9. The armature structure of a toroidal wound rotary electric machine according to claim 1, wherein said armature is a stator of an induction machine. 10. The armature structure of a toroidal wound rotary electric machine according to claim 1, wherein said armature is a rotor of an induction machine. 11. The armature according to claim 10, wherein a portion of the armature radially inside the opposing core portion is filled with an aluminum material forming a part or all of the conductive portion by die casting. Armature structure of toroidal winding rotating electric machine. 12. The toroidal winding according to claim 10, wherein a cylindrical ring-shaped copper material is provided on a portion of the annular core portion on a side radially opposite to the opposing core portion and is a part of a conductive portion. Armature structure of rotary electric machine. 13. The armature structure for a toroidal wound rotary electric machine according to claim 10, wherein all of the conductive portions of said armature are made of copper. 14. The motor according to claim 14, wherein the armature is an AC magnet synchronous machine or A
The armature structure of a toroidal wound rotary electric machine according to claim 1, wherein the stator is a stator of a C reluctance synchronous machine. 15. The armature structure of a toroidal wound rotary electric machine according to claim 1, wherein the rotary electric machine has an inner rotor structure. 16. The armature structure for a toroidal-wound rotary electric machine according to claim 1, wherein the rotary electric machine has an outer rotor structure. 17. The toroidal wound rotary electric machine according to claim 1, wherein a winding is applied so that a coil of one phase is accommodated in one slot for one pole. Armature structure. 18. The armature structure of a toroidal wound rotary electric machine according to claim 17, wherein the rotor constituting the other member is configured as a field magnet type structure or a reluctance type structure.