JP7048344B2 - Manufacturing method of rotary electric machine - Google Patents

Description

The present invention relates to a rotary electric machine, and more particularly to a rotary electric machine having a reduced cost.

Patent Document 1 is known as a background technique relating to an induction machine which is an example of a rotary electric machine. Patent Document 1 provides a highly efficient inducer while improving the power factor by increasing the leakage of harmonic flux while reducing the leakage of the main magnetic flux. Therefore, the rotor is located on the outer peripheral side of the rotor slot. It is characterized by the shape of the rotor with slits.

Japanese Unexamined Patent Publication No. 2014-176113

Patent Document 1 is a technique for providing an induction machine provided with a rotor slit. If the cross-sectional shape of the iron core is changed for each number of poles for a plurality of rotary electric machines, a punching die for the iron core corresponding to the number of poles is required, which leads to an increase in equipment cost. Therefore, it is desirable to change the number of poles without changing the cross-sectional shape of the iron core. However, if the cross-sectional shape of the iron core is not changed by a different number of poles, the characteristics of the inducer will be significantly deteriorated. Patent Document 1 does not give consideration to reducing the equipment cost and preventing deterioration of the characteristics of the rotary electric machine without changing the cross-sectional shape of the iron core corresponding to different numbers of poles.

An object of the present invention is to provide a rotary electric machine and a rotary electric machine set that reduce equipment costs and prevent deterioration of the characteristics of the rotary electric machine.

A preferred example of the present invention is a stator core, a stator having a stator slot arranged in the circumferential direction of the stator core, and a stator winding arranged in the stator slot, and a rotor core. A rotor slot arranged in the circumferential direction of the rotor core, a rotor bar arranged in the rotor slot, and a rotor arranged on the outer peripheral side of the rotor core and connected to the rotor slot. A rotary electric machine having a rotor having a slit and a rotor having a slit.
The number of poles is included in the defined pole number range, and the amount of change in the permeance ratio of the rotor slit corresponding to the change in the number of poles within the pole number range is the opening of the stator slot. The stator has a height at the opening of the stator slot, a width at the opening of the stator slot, and a width of the rotor slit so as to be smaller than the slot permeance ratio of the stator. It is a rotary electric machine having substantially the same shape in the range of the number of poles.

Further, another preferred example of the present invention is a stator having a stator core, a stator slot arranged in the circumferential direction of the stator core, and a stator winding arranged in the stator slot. , The rotor core, the rotor slot arranged in the circumferential direction of the rotor core, the rotor bar arranged in the rotor slot, and the rotor slot arranged on the outer peripheral side of the rotor core. A rotary electric machine set having a plurality of rotary electric machines having a rotor having a rotor slit connected to the rotor.
The number of poles of the first rotary electric machine constituting the rotary electric machine set is smaller than the number of poles of the second rotary electric machine constituting the rotary electric machine set, and the cross-sectional shape of the stator core of the first rotary electric machine The cross-sectional shape of the stator core of the second rotary electric machine is substantially the same, and the outer diameter of the rotor core of the first rotary electric machine is the outer diameter of the rotor core of the second rotary electric machine. It is a smaller rotary electric machine set.

According to the present invention, it is possible to reduce the equipment cost and prevent the deterioration of the characteristics of the rotary electric machine.

It is a partial cross-sectional view of the induction motor of Example 1. FIG. It is a perspective view of the manufacturing apparatus of Example 1. FIG. It is a figure which shows the power factor of the rotary electric machine in Example 1. FIG. It is a figure which shows the maximum output of the rotary electric machine in Example 1. FIG. It is a partial cross-sectional view of the induction motor of Example 2. FIG. It is a perspective view of the manufacturing apparatus which is a modification of Example 1. FIG. It is a block diagram of the rotary electric machine system of Example 3. FIG. It is a block diagram of the generator system of Example 3. FIG.

Hereinafter, examples will be described with reference to the drawings.

The first embodiment will be described with reference to an induction motor which is an example of a rotary electric machine. FIG. 1 is a partial cross-sectional view of the induction motor of the first embodiment. Partial FIGS. 15 and 16 show an enlarged portion of the dotted line in the left figure of FIG. 1. This embodiment is a rotary electric machine in which the stator 1 and the rotor 2 face each other in the radial direction with a gap 3 in between. The stator 1 has an annular core back 4, a stator core 6 having a plurality of teeth 5 provided in the circumferential direction so as to project radially from the core back 4, and a circumferential direction on the inner diameter side of the stator core 6. The stator slot 7 is arranged and formed between adjacent teeth 5, and the stator winding 8 is arranged and wound in the stator slot 7. The teeth 5 are provided with convex portions 9 protruding in the circumferential direction from the tip portion protruding in the radial direction on both sides in the circumferential direction. The rotor 2 is provided on the outer peripheral side of the rotor core 11, the rotor bars 13 arranged in the plurality of rotor slots 12 arranged at predetermined intervals in the circumferential direction on the rotor core 11, and the rotor slots 12. The rotor slits 10 are continuously arranged. In the first embodiment, the cross-sectional shapes of the stator 1 and the rotor 2 are substantially the same. Here, the cross-sectional shape refers to a shape such as a slot of the stator 1 or the rotor 2, and is a shape formed on the stator or the rotor when the stator is created by using a common punching die for the stator. To say. Further, the stator 1 and the rotor 2 that can be punched out using the same mold are not limited to the same shape, but are referred to as the stator 1 having substantially the same shape in consideration of the secular variation of the mold.

FIG. 2 is a perspective view of the manufacturing apparatus of the first embodiment. FIG. 2 is a diagram showing a die 21 used for punching an electromagnetic steel sheet 22 in this embodiment, a punched stator core 11, and a rotor core 6. The mold 21 of this embodiment has a structure in which a mold for punching the inner diameter of the rotor 2, the rotor slot 12, the inner diameter of the stator 1, the stator slot 7, and the outer diameter of the stator 1 is integrated. The stator core 11 and the rotor core 6 formed by punching with the die 21 can be shared by rotating electric machines having different numbers of poles. According to this embodiment, these punched cross-sectional shapes can be made substantially the same with a plurality of different pole numbers, so that the mold can be shared even when the number of poles is different.

Therefore, in the prior art, a plurality of molds are used for each number of poles, for example, as in the case of 6 poles and 8 poles. On the other hand, in this embodiment, the number of molds can be reduced, so that the cost of the mold is reduced and the manufacturing period of the mold is shortened.

The outer diameter D of the rotor core 11 shown in FIG. 1 is changed by stacking electromagnetic steel sheets to assemble the rotor 2 and then machining the rotor core 11. As shown in Part 15 and Part 16, the appropriate size of the gap length g varies from pole to pole. Partial FIG. 15 shows the case where the number of poles is small, that is, the case where the number of poles is the minimum in the range of the number of poles sharing the mold, and FIG. 16 shows the case where the number of poles in the range of the number of poles is the maximum number of poles. Is shown. The outer diameter D of the rotor core 11 is changed by machining to make the gap length g an appropriate size for each number of poles. At this time, the height hr of the rotor slit 10 is changed at the same time.

In the rotary electric machine of this embodiment, the influence on the motor characteristics by changing the height hr of the rotor slit 10 is small. Therefore, in the rotary electric machine of the present embodiment, the punched cross-sectional shape of the electromagnetic steel sheet can be substantially the same even when the number of poles is different, and the mold can be shared even when the number of poles is different.

When the height hr of the rotor slit 10 changes, the amount of magnetic flux passing through the rotor slit 10 in the circumferential direction changes. As a result, the amount of magnetic flux interlinking with the rotor bar 13 changes, which affects the power factor and the maximum output, which are motor characteristics. The rotary electric machine of this embodiment is provided with a rotor slit 10 made of a non-magnetic material, which is difficult for magnetic flux to pass through, as opposed to a fully closed rotor slot structure in which the rotor slit 10 is not provided.

Therefore, even when the outer circumference of the rotor core 11 is machined to change the height hr of the rotor slit 10, the amount of change in the magnetic flux passing through the rotor slit in the circumferential direction is small. When the relative permeability is μr, the permeance ratio Pr of the rotor slit 10 representing the ease of passage of the magnetic flux is expressed by the following equation 1.
Pr = μr × hr / wr Equation 1
Here, wr is the width of the rotor slit 10. When the rotor slit 10 of the rotor has facing surfaces parallel to each other in the radial direction, the width of the rotor slit is uniquely determined. If they are not parallel, the rotor slit width wr is the average value of the slit widths.
Since the rotary electric machine of the first embodiment is provided with the rotor slit 10 made of a non-magnetic material or air, the relative magnetic permeability μr is about 1. On the other hand, when the rotor slit 10 is not provided, the relative magnetic permeability μr is several times to several thousand times that of this embodiment. Therefore, in the case of the rotary electric machine of the present embodiment provided with the rotor slit 10 as opposed to the case of the fully closed rotor slot structure, the amount of change in Pr with respect to the amount of change in the height hr of the rotor slit 10 Is smaller, and even if the height hr of the rotor slit 10 is changed from an appropriate size, the influence on the motor characteristics is small.

As shown in 15 which is a partial view of FIG. 1 and 16 which is a partial view, when the number of poles is small, the appropriate gap length g is larger than when the number of poles is large. In other words, the outer diameter of the rotor 2 is smaller when the number of poles is small than when the number of poles is large. When the appropriate gap length is gmax when the number of poles is the smallest and gmin is the case where the number of poles is the largest among a plurality of different pole numbers, the change amount Δhr of the rotor slit 10 height is expressed by the following equation. It is represented by 2.
Δhr = gmax-gmin Equation 2

The amount of change ΔPr in the permeance ratio of the rotor slit 10 when the height of the rotor slit 10 changes by Δhr is expressed by the following equation 3.
ΔPr = (gmax-gmin) / wr equation 3
As can be seen from Equation 3, when the width wr of the rotor slit 10 is small, the amount of change ΔPr of the permeance ratio of the rotor slit 10 is large. That is, in order to sufficiently obtain the effect of reducing the influence on the motor characteristics even when the height hr of the rotor slit 10 is changed from the optimum size, it is necessary to increase the width wr of the rotor slit 10. be.

When the height at the opening of the stator slot 7 is hs and the width is ws, the slot permeance ratio Ps of the opening of the stator slot 7 is expressed by the following equation 4.
Ps = hs / ws equation 4

The slot permeance ratio Ps of the opening of the stator slot 7 is determined so that the influence on the motor characteristics is sufficiently small. Therefore, by making the change amount ΔPr of the permeance ratio of the rotor slit 10 smaller than the slot permeance ratio Ps of the opening of the stator slot 7, the height hr of the rotor slit 10 is changed from an appropriate size. Even in such a case, the effect of reducing the influence on the motor characteristics can be sufficiently obtained.

The amount of change ΔPr in the permeance ratio of the rotor slit 10 that can sufficiently reduce the influence on the motor characteristics is expressed by the following equation 5.
ΔPr <Ps equation 5
Substituting Equation 3 and Equation 4 into Equation 5, it is expressed by the following Equation 6.
(Gmax-gmin) / wr <hs / ws Equation 6
Equations 6 to wr are expressed by the following equation 7.
wr> (gmax-gmin) × ws / hs Equation 7
By setting the width wr of the rotor slit 10 satisfying the equation 7, even if the height hr of the rotor slit 10 is changed from an appropriate size, the influence on the motor characteristics can be sufficiently reduced. ..

When the width wr of the rotor slit 10 changes, the surface area of the portion where the stator core 6 and the rotor core 11 face each other (the gap length is g) changes. As a result, the magnetic attraction force of the stator core 6 and the rotor core 11 changes, which affects the power factor and the maximum output, which are motor characteristics. The stator winding 8 is incorporated from the inner peripheral side of the stator slot 7, and in order to improve its workability, the width ws of the opening of the stator slot 7 is determined to be larger than the magnetically appropriate dimension. Will be done.

On the other hand, since the rotor bar 13 is housed from a die-cast aluminum or copper or an axial end portion, the width wr of the rotor slit 10 does not affect workability. Therefore, the width wr of the rotor slit 10 is determined to be smaller than the width ws of the opening of the stator slot 7. The width wr of the rotor slit 10 is expressed by the following equation 8.
wr <ws formula 8
According to the formulas 7 and 8, the width wr of the rotor slit 10 is expressed by the following formula 9.
(Gmax-gmin) × ws / hs <wr <ws formula 9
When equation 9 is made dimensionless by dividing by ws, it is expressed by the following equation 10.
(Gmax-gmin) / hs <wr / ws <1 formula 10

FIG. 3 is a diagram showing the relationship between the power factor of the rotary electric machine (the unit is p.u on the vertical axis) and the number of poles (horizontal axis) in the first embodiment. The line indicated by 30 indicates the value of this embodiment, and the line indicated by 31 indicates the value of the comparative example. In the rotary electric machine according to this embodiment, the mold is shared by making the punched cross-sectional shape of the electrical steel sheet substantially the same in 6 to 20 poles, and the outer diameter D of the rotor core 11 is changed by machining. The gap length g is set to an appropriate size for each number of poles.

When the gap length in the case of 6 poles is gmax and the gap length in the case of 20 poles is gmin, (gmax-gmin) / hs in the formula 10 is 0.30 and wr / ws is 0.39. Therefore, the equation 10 holds.

In the case of the fully closed rotor slot structure, the rotary electric machine according to Comparative Example 31 shares a die in order to make the punched cross-sectional shape of the electrical steel sheet substantially the same in 6 to 18 poles, and rotates by machining. The outer diameter D of the core steel 11 is changed to make the gap length g an appropriate size for each number of poles. The power factor in FIG. 3 is such that the punched cross-sectional shape is different for each number of poles, and the power factor of the rotary electric machine by the method of manufacturing a die for each number of poles is 1.

The rotary electric machine according to the 30th embodiment has a power factor closer to 1 than the rotary electric machine according to the comparative example 31. That is, the rotary electric machine according to the present embodiment has a smaller adverse effect on the power factor due to the shared mold than the rotary electric machine according to the comparative example. Therefore, in the rotary electric machine of the present embodiment, the punched cross-sectional shape of the electromagnetic steel sheet can be substantially the same even when the number of poles is different, and the mold can be shared even when the number of poles is different.

FIG. 4 is a diagram showing the relationship between the maximum output of the rotary electric machine (the unit is p.u on the vertical axis) and the number of poles (horizontal axis) in the first embodiment. FIG. 4 is the maximum output of the rotary electric machine of FIG. The maximum output of FIG. 4 is such that the punched cross-sectional shape is different for each number of poles, and the maximum output of the rotary electric machine by the method of manufacturing a die for each number of poles is 1.

The maximum output of the rotary electric machine according to the 40th embodiment is closer to 1 than the maximum output of the rotary electric machine according to the comparative example 41. That is, the rotary electric machine according to the present embodiment has a smaller adverse effect on the maximum output due to the shared mold than the rotary electric machine according to the comparative example. Therefore, in the rotary electric machine of the present embodiment, the punched cross-sectional shape of the electromagnetic steel sheet can be substantially the same even when the number of poles is different, and the mold can be shared even when the number of poles is different.

In Patent Document 1, for example, when the width on the outer peripheral side of the rotor slit 10 is S2 and the width on the inner peripheral side is W, S2 / W ≦ 0.3 is set, and the rotor slit is considered only for a single model. The dimensions of 10 have been determined.

On the other hand, in this embodiment, from Equation 2 showing the difference in gap lengths of a plurality of models having different numbers of poles, the dimension wr of the rotor slit 10 is set so that the change in Pr when the number of poles is different is small. It is determined as in Equation 7. By determining the width wr of the rotor slit 10 in consideration of the design parameters of a plurality of models having different numbers of poles as in this embodiment, it occurs when the punched cross-sectional shapes of the iron cores are substantially the same with different numbers of poles. Deterioration of the characteristics of the inducer can be suppressed for the first time.

In general, a suitable gap length is inversely proportional to the number of poles to the 0.5th power. Therefore, in a plurality of models having different numbers of poles, the relationship of the following equation 11 is obtained when the smallest number of poles is Pmin and the largest number of poles is Pmax.
gmin = gmax × (Pmin / Pmax) ^0.5 formula 11
Substituting the number 11 into the number 10 and solving for wr is expressed by the following equation 12.
wr> (1- (Pmin / Pmax) ^0.5 ) × ws × gmax / hs Equation 12
In equation 12, when Pmin has 6 poles (gmax is the gap length of the 6-pole machine) and Pmax has 8 poles, it is expressed by the following equation 13.
wr> 0.134 × ws × gmax / hs Equation 13
Therefore, if a mold that holds the formula 13 is manufactured and a 6-pole machine is manufactured, then even if it becomes necessary to manufacture an 8-pole machine after that, the mold that manufactures this 6-pole machine is used. If an 8-pole machine is manufactured by punching an electromagnetic steel sheet, the manufacturing cost of the die can be reduced by sharing the die. Furthermore, deterioration of the characteristics of the 8-pole machine due to sharing of the mold is suppressed.

In equation 12, when Pmin has 6 poles (gmax is the gap length of the 6-pole machine) and Pmax has 12 poles, it is expressed by the following equation 14.
wr> 0.293 × ws × gmax / hs Equation 14
Therefore, if a mold that holds the formula 14 is manufactured and a 6-pole machine is manufactured, then even if it becomes necessary to manufacture an 8- to 12-pole machine after that, the mold that manufactures this 6-pole machine can be used. If an 8- to 12-pole machine is manufactured by punching an electromagnetic steel sheet using it, the manufacturing cost of the die can be reduced by sharing the die. Further, deterioration of the characteristics of the 8- to 12-pole machine due to the sharing of the mold is suppressed.

In equation 12, when Pmin has 6 poles (gmax is the gap length of the 6-pole machine) and Pmax has 20 poles, it is expressed by the following equation 15.
wr> 0.452 × ws × gmax / hs Equation 15
Therefore, if a mold that holds the formula 15 is manufactured and a 6-pole machine is manufactured, then even if it becomes necessary to manufacture an 8- to 20-pole machine after that, the mold that manufactures this 6-pole machine can be used. If an electromagnetic steel sheet is punched out to manufacture an 8- to 20-pole machine, the cost of manufacturing the die can be reduced by sharing the die. Further, deterioration of the characteristics of the 8- to 20-pole machine due to the sharing of the mold is suppressed.

In equation 12, when Pmin has 4 poles (gmax is the gap length of the 4-pole machine) and Pmax has 6 poles, it is expressed by the following equation 16.
wr> 0.184 × ws × gmax / hs Equation 16
Therefore, if a mold that holds the formula 16 is manufactured to manufacture a 4-pole machine, even if it becomes necessary to manufacture a 6-pole machine thereafter, the mold that manufactured this 4-pole machine will be used. If a 6-pole machine is manufactured by punching an electromagnetic steel sheet, the manufacturing cost of the die can be reduced by sharing the die. Furthermore, deterioration of the characteristics of the 6-pole machine due to sharing of the mold is suppressed.

In the formula 12, when Pmin is 2 poles (gmax is the gap length of the 2-pole machine) and Pmax is 6 poles, it is expressed by the following formula 17.
wr> 0.423 × ws × gmax / hs Equation 17
Therefore, if a mold that holds the formula 17 is manufactured and a 2-pole machine is manufactured, then even if it becomes necessary to manufacture a 4- to 6-pole machine after that, the mold that manufactures this 2-pole machine can be used. If an electromagnetic steel sheet is punched out to manufacture a 4- to 6-pole machine, the cost of manufacturing the die can be reduced by sharing the die. Further, deterioration of the characteristics of the 4- to 6-pole machine due to the sharing of the mold is suppressed.

As a modification of the first embodiment, an example will be described in which the cross-sectional shape of only the stator core 6 is substantially the same in a plurality of models having different numbers of poles. FIG. 6 is a perspective view of the manufacturing apparatus of this embodiment. Since the die for punching the electromagnetic steel sheet of the rotor core 11 can be changed in a plurality of models having different numbers of poles, the gap length can be changed in a plurality of models having different numbers of poles without processing the outer circumference of the rotor core 11. It is possible to make it.

According to such a manufacturing method, workability is improved because it is not necessary to process the outer circumference of the rotor core 11. Further, since the punched cross-sectional shape of the rotor core 11 can be changed in a plurality of models having different numbers of poles, it is easy to adjust the characteristics even if the punched cross-sectional shapes of the stator core 6 are substantially the same with different numbers of poles.

FIG. 6 shows a die 60 capable of punching an electromagnetic steel sheet 61 at a time in order to create a stator slot. A notching die that punches out the stator slots for each slot may be used. Since the notching die is smaller than the die punched at one time, the manufacturing cost of the die is reduced and the manufacturing period is shortened.

In the second embodiment, the material of the rotor slit 10 is the same as that of the rotor bar 13 as a portion different from the first embodiment. FIG. 5 is a partial cross-sectional view of the induction motor of the second embodiment. When the rotor bar 13 is manufactured by die casting, the same material as the rotor bar 13 is arranged in the rotor slit 10. By adopting the configuration of this embodiment, it is not necessary to remove the material stored in the rotor slit 10, and the workability is improved.

Further, since the conductive material is arranged in the rotor slit 10, the current of the rotor bar 13 is reduced, and the secondary copper loss generated in the rotor bar 13 is reduced. When the conductive material is arranged in the rotor slit 10, the magnetic flux leaking through the rotor slit 10 in the circumferential direction is reduced, so that during steady operation such as rated operation and transient operation such as start operation. Both improve the power factor. Since the power factor is improved, the current flowing through the stator winding 8 is reduced, and the primary copper loss generated in the stator winding 8 is reduced. Efficiency is improved because primary copper loss and secondary copper loss are reduced.

The third embodiment is about a rotary electric machine system having a load facility 102 driven by the rotary electric machine 100 using the rotary electric machine described in the first to second embodiments and a rotary electric machine system using the rotary electric machine 100 as a generator. explain.

FIG. 7 is a block diagram of the rotary electric machine system of the third embodiment. Further, FIG. 8 is a configuration diagram of the generator system of the third embodiment. This embodiment is a rotary electric machine system provided with any one of a compressor, a drill, a mill, and a fan as the load equipment 102. That is, as the rotary electric machine system, the rotary electric machine 100 that receives power from the power supply 101 is a pump system that drives a compressor, an excavation system that drives a drill for excavation by the rotary electric machine 100, and chips for the rotary electric machine 100. A chip system for driving a mill or the like, or a fan system for driving a fan with a rotary electric machine 100 is constructed.

Further, the generator system is composed of a rotary electric machine 100 that converts the power of the turbine 103 into electric power. The rotary electric machine 100 used in these rotary electric machine systems is referred to as the rotary electric machine 100 of the first to third embodiments. As a result, the rotary electric machine 100 of the first to third embodiments contributes to the cost reduction of the rotary electric machine system because the manufacturing cost of the mold is reduced.

Although the examples have been described above, the present invention is not limited to the above-mentioned examples, and various modifications are included. For example, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add, delete, or replace a part of the configuration of each embodiment with another configuration.

1 ... stator, 2 ... rotor, 3 ... gap, 4 ... core back, 5 ... teeth, 6 ... stator core, 7 ... stator slot, 8 ... stator winding, 9 ... convex part, 10 ... rotation Child slit, 11 ... rotor core, 12 ... rotor slot, 13 ... rotor bar, 100 ... rotor electric machine,

Claims (11)

A stator having a stator core, a stator slot arranged in the circumferential direction of the stator core, and a stator winding arranged in the stator slot,
A rotor core, a rotor slot arranged in the circumferential direction of the rotor core, and a rotor bar arranged in the rotor slot,
A method for manufacturing a rotary electric machine, which is arranged on the outer peripheral side of the rotor core and has a rotor having a rotor slit connected to the rotor slot.
The number of poles is included in the defined pole number range, and the amount of change in the permeance ratio of the rotor slit corresponding to the change in the number of poles within the pole number range is the opening of the stator slot. The relationship between the height at the opening of the stator slot, the width at the opening of the stator slot, and the width of the rotor slit is determined so as to be smaller than the slot permeance ratio of the stator. A method for manufacturing a rotary electric machine for manufacturing a plurality of rotary electric machines having substantially the same shape in the pole number range. In the method for manufacturing a rotary electric machine according to claim 1,
The stator and the rotor face each other in the radial direction with a gap between them.
The stator includes an annular core back and a stator core having a plurality of teeth radially protruding from the core back and arranged in the circumferential direction.
It has the stator slot formed between the adjacent teeth and the stator windings arranged in the stator slot.
The tooth has a convex portion protruding in the circumferential direction and has a convex portion.
The radial height of the tip of the convex portion is hs, the circumferential width of the opening of the stator slot is ws, the circumferential width of the rotor slit is wr, and the number of poles is in the pole number range. When the radial distance of the gap of the smallest rotary electric machine is gmax and the radial distance of the gap of the rotary electric machine having the largest number of poles is gmin, the rotary electric machine is characterized by having the relationship of the following equation 10. Manufacturing method .
(Gmax-gmin) / hs <wr / ws <1 formula 10 In the method for manufacturing a rotary electric machine according to claim 2,
A method for manufacturing a rotary electric machine, characterized in that it has the relationship of the following formula 12 when the smallest number of poles is Pmin and the largest number of poles is Pmax in the pole number range.
wr> (1- (Pmin / Pmax) ^0.5 ) × ws × gmax / hs Equation 12 In the method for manufacturing a rotary electric machine according to claim 1,
In the pole number range, the outer diameter of the rotor core is reduced as the number of poles decreases, and the cross-sectional shape of the rotor has a shape that is substantially the same in the pole number range. Manufacturing method of rotary electric machine. In the method for manufacturing a rotary electric machine according to claim 2,
A method for manufacturing a rotary electric machine, which has the relationship of the following equation 14 when the smallest number of poles is 6 in the pole number range.
wr> 0.293 × ws × gmax / hs Equation 14 In the method for manufacturing a rotary electric machine according to claim 2,
A method for manufacturing a rotary electric machine, characterized in that it has the relationship of the following formula 15 when the smallest number of poles is 6 in the pole number range.
wr> 0.452 × ws × gmax / hs Equation 15 In the method for manufacturing a rotary electric machine according to claim 2,
A method for manufacturing a rotary electric machine, characterized in that it has the relationship of the following equation 16 when the smallest number of poles is 4 in the pole number range.
wr> 0.184 × ws × gmax / hs Equation 16 In the method for manufacturing a rotary electric machine according to claim 2,
A method for manufacturing a rotary electric machine, characterized in that it has the relationship of the following formula 17 when the smallest number of poles is 2 in the pole number range.
wr> 0.423 × ws × gmax / hs Equation 17 In the method for manufacturing a rotary electric machine according to claim 1,
A method for manufacturing a rotary electric machine, characterized in that the same material as the rotor bar is arranged in the rotor slit. The rotary electric machine according to claim 1 drives load equipment.
A method for manufacturing a rotary electric machine, wherein the load equipment is any one of a compressor, a drill, a mill, and a fan. The rotary electric machine according to claim 1 is a generator, and the rotary electric machine is a method for manufacturing a rotary electric machine, characterized in that the power of a turbine is converted into electric power.

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