JP2019092367A - Motor and manufacturing method for the same - Google Patents

Abstract

To provide a motor capable of outputting high torque while realizing a small size and a light weight, and having comparatively large number of poles.SOLUTION: A motor 10 comprises: a rotor 20 having a permanent magnet 24; and a stator 30 having a salient pole 40 to which a coil 50 is mounted. Six salient pole groups of first salient pole group to six salient pole group structured by n-salient poles are distributed in a circular direction. The salient group to which a current of the same phase is supplied is distributed so as to be positioned at a position shifted by 180 degrees at a mechanical angle. Each salient pole 40 is formed in a straight shape. In a coil group mounted to the salient pole 40 of the salient pole groups, n-coils 50 are serially connected. Each coil 50 is mounted to the salient pole so that each winding direction between adjacent salient poles is inversely faced each other, and is cross-over on a tip side or a base end side of the salient pole 40 with a crossover track 59 between the adjacent salient poles. A relationship of them becomes inverse at a tip side or a base end side between adjacent slots SL in the crossover track 59.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a motor and a method of manufacturing the motor.

  BACKGROUND ART In recent years, power mechanisms including motors have been utilized in various vehicles, devices, and the like. In particular, wheelchairs, electric standing motorcycles << eg Segway (R). It is expected that a high torque can be output to a power mechanism used for an applied product such as an electric vehicle such as an electric vehicle, a care robot, an electric reel for fishing, etc. while being compact and lightweight.

As a method for outputting high torque, a method using a reduction gear is mentioned as an example. In this method, a reduction gear having a plurality of gears is connected to an output shaft (shaft) of the motor to reduce the rotational speed of the motor, and power with increased torque is transmitted from the output shaft of the reduction gear. However, this method requires a reduction gear separately in addition to the motor, and the number of parts increases, which makes it difficult to realize the reduction in size and weight of the entire power mechanism. In addition, to some extent, problems such as energy loss and noise generation in the reduction gear also arise.
As another method, there is also a method of direct driving only with a motor without using a reduction gear. In this case, the torque that can be output has to be increased accordingly.

  As a motor capable of outputting a relatively high torque, a motor using a salient pole (a projecting iron core or core) has been known conventionally (see, for example, Patent Document 1).

  FIG. 16 is a figure shown in order to demonstrate the conventional motor 900. As shown in FIG. As for the coil 950, only the coils attached to only the salient poles 940 belonging to the first salient pole group 941G and the fourth salient pole group 944G are illustrated, and the coils attached to the other salient poles are not shown. The second salient pole group 942G, the third salient pole group 943G, the fifth salient pole group 945G and the sixth salient pole group 946G, the second coil group 952G, the third coil group 953G, the fifth coil group 955G and The sixth coil group 956G has no sign.

In the conventional motor 900, as shown in FIG. 16, coils 950 are attached to a rotor 920 having permanent magnets 924 in which magnetic poles of N and S poles are alternately arranged along the circumferential direction. And the plurality of salient poles 940 are arranged along the circumferential direction, and the tip surface of the salient pole 940 faces the surface on which the magnetic poles of the permanent magnet 924 are arranged. And the formed stator 930.
In FIG. 16, the number of salient poles 940 included in the stator 930 is twelve.
In stator 930, a first salient pole group 941G constituted by two salient poles 940, a second salient pole group 942G constituted by two salient poles 940, a third constituted by two salient poles 940 A salient pole group 943 G, a fourth salient pole group 944 G including two salient poles 940, a fifth salient pole group 945 G including two salient poles 940, and two salient poles 940 The sixth salient pole group 946G is disposed along the circumferential direction of the stator 930 in this order, and the first salient pole group 941G and the fourth salient pole group 944G, the second salient pole group 942G and the fifth salient pole The group 945G, and the third salient pole group 943G and the sixth salient pole group 946G are disposed so as to be displaced by 180 degrees with respect to each other at a mechanical angle.
A first coil group 951G consisting of two coils 950 connected in series is attached to the two salient poles 940 of the first salient pole group 941G, and the two salient poles of the second salient pole group 942G are mounted. A second coil group 952G consisting of two coils 950 connected in series is attached to the pole 940, and two poles connected in series to the two salient poles 940 of the third salient pole group 943G. A third coil group 953G of four coils 950 is mounted, and a fourth coil group 954G of two coils 950 connected in series is mounted on the two salient poles 940 of the fourth salient pole group 944G. The fifth coil group 955G consisting of two coils 950 connected in series is mounted on the two salient poles 940 of the fifth salient pole group 945G, and the sixth salient pole group is mounted. Two salient poles 940 of 946 G are connected in series The sixth coil group 956G consisting of two coils 950 is mounted.
Then, a U-phase current is supplied to the first coil group 951G and the fourth coil group 954G, a V-phase current is supplied to the second coil group 952G and the fifth coil group 955G, and a third coil group The W phase current is supplied to 953G and the sixth coil group 956G.

  According to the conventional motor 900, since the stator (armature) 930 is provided with the salient pole (core) 940, it can be expected to obtain a large output as compared with the coreless motor (the upper left column in page 2 of Patent Document 1 reference.).

Japanese Patent Application Laid-Open No. 62-110468

However, depending on the applied product, the torque by the conventional motor 900 is insufficient, and in recent years, a motor that outputs a higher torque is desired.
However, to output a higher torque, the motor generally becomes larger and the weight also increases.
That is, (i) When it is intended to increase the number of turns of the coil, the height of the cylinder of the coil (the height of the cylinder when the coil is cylindrical) and the thickness increase, and the coil Also, a large space can not be secured as a slot (a groove between adjacent salient poles, also called an iron core groove) for housing, and eventually the motor becomes large. In addition, (ii) if it is intended to increase the current supplied to the coil, the wire with a large diameter will be used, which leads to an increase in size of the coil and, consequently, an increase in size and weight of the motor.
On the other hand, there is also an approach of increasing the number of permanent magnet poles and the number of salient poles (hereinafter, these may be collectively referred to as "the number of poles") in order to obtain (iii) high torque. However, when the product to which the motor is applied is a product such as a wheelchair, an electric standing motorcycle, a care robot, etc., the diameter of the motor needs to be suppressed within a certain size. If the number of poles is increased while the diameter is reduced to a predetermined diameter, the width of the slot must necessarily be narrowed. As a result, for example, it becomes difficult to insert a needle for guiding the winding into the back of the slot, which makes it difficult to fit the winding into the slot. As a result, the coil attachment to the salient pole becomes extremely difficult.
In addition, in the case of using so-called distributed winding technology, or in which coils to which U-phase, V-phase and W-phase currents are supplied are sequentially arranged in the circumferential direction. In the case of use, if the number of poles is increased, the total extension of the crossovers extending from the slot to another slot is also lengthened as a whole, and the size and weight of the motor are increased.
In any case, when aiming at increasing torque by increasing the number of poles in the conventional motor, the motor will eventually become large and heavy.
Under these circumstances, motors having a diameter within a certain size (not large), a relatively large number of poles, and capable of outputting high torque have been put to practical use until now. Not in.

  Therefore, the present invention has been made in view of the above-mentioned circumstances, and it is possible to output high torque with a relatively large number of poles while suppressing the size and weight (while realizing small size and light weight), The purpose is to provide a motor suitable for direct drive.

[1] A first motor according to the present invention comprises: a rotor having permanent magnets in which magnetic poles of N and S poles are alternately arranged along a circumferential direction; A stator having poles, wherein the plurality of salient poles are arranged along a circumferential direction, and a tip surface of the salient poles is formed to face a surface on which the magnetic poles of the permanent magnet are arrayed; The number of the salient poles of the stator is 6n (n is a natural number of 4 or more), and in the stator, the first salient pole composed of n first salient poles A pole group, a second salient pole group formed of n second salient poles, a third salient pole group formed of n third salient poles, a fourth part formed of n fourth salient poles A salient pole group, a fifth salient pole group configured by n fifth salient poles, and a n sixth salient pole The sixth salient pole group to be inserted is disposed along the circumferential direction of the stator in this order, and the first salient pole group and the fourth salient pole group, the second salient pole group and the fifth salient pole The third salient pole group and the sixth salient pole group are disposed at positions shifted by 180 degrees with respect to each other in mechanical angle, and n of the first salient pole group is provided. A first coil group consisting of n pieces of coils connected in series is attached to the first salient poles, and n second salient poles of the second salient pole group are attached to the first salient poles. A second coil group consisting of n coils connected in series is mounted, and n coils connected in series are connected to the n third salient poles of the third salient pole group A third coil group comprising the plurality of n coils connected in series to the n fourth salient poles of the fourth salient pole group; And a fifth coil group consisting of n coils connected in series is mounted on the n fifth salient poles of the fifth salient pole group. A sixth coil group consisting of n coils connected in series is mounted on the n sixth salient poles of the sixth salient pole group, and the first coil group and the sixth coil group A U-phase current is supplied to the four coil groups, a V-phase current is supplied to the second coil group and the fifth coil group, and W is applied to the third coil group and the sixth coil group. Current of each phase is supplied, and each of the salient poles is formed in a flat shape straight along the radial direction of the stator, and in each of the first salient pole group to the sixth salient pole group, the coil Are mounted on the salient poles such that the winding directions are opposite to each other between the adjacent salient poles The coil is passed between the adjacent salient poles by a crossover wire which is a part of a winding constituting the coil at the tip end side or the base end side of the salient poles, and the crossover wire is adjacent The relationship between the distal end side and the proximal end side is reversed between the slots.

In the first motor of the present invention, each salient pole is formed in a flat shape straight along the radial direction of the stator, and each coil is attached to each salient pole. On the other hand, (a) the coil is attached to the salient poles in a state in which the winding directions are opposite to each other between the adjacent salient poles, and (b) the coil is the coil between the adjacent salient poles The crossover is a part of the winding that forms part of the winding, and is extended at the tip end or the base end of the salient pole, and the crossover is the tip end or the base end between adjacent slots. The relationship is reversed. And (c) n coils having the regularities in (a) and (b) above are connected in series to constitute an ith coil group (where i is a natural number from 1 to 6).
With such a salient pole and coil structure, it is possible to realize and provide a relatively small motor with a narrow slot width while being able to output a high torque with a relatively large number of poles (details will be described. Will be described later).

  In the first motor of the present invention, a coil group relating to one phase is connected in series and mounted in series on n salient poles relating to one group. In addition, crossovers are passed between the adjacent salient poles. For this reason, in the case of using a technique of distributed winding of the winding, or winding the coils so that the coils supplied with the U-phase, V-phase and W-phase currents are sequentially arranged in the circumferential direction. In contrast to the case of using the technology described above, the motor can be miniaturized. In addition, since the length of the crossover can be minimized, the total length of the winding can be shortened, and the weight of the motor can be reduced. In addition, it is possible to suppress the resistance value when the winding is totally extended, and to improve the energy efficiency of the motor.

Furthermore, in the first motor of the present invention, a first salient pole group constituted by n first salient poles, a second salient pole group constituted by n second salient poles, an n first salient pole group A third salient pole group configured by three salient poles, a fourth salient pole group configured by n fourth salient poles, a fifth salient pole group configured by n fifth salient poles, and n A sixth salient pole group constituted by six sixth salient poles is disposed in this order along the circumferential direction of the stator. The first salient pole group and the fourth salient pole group, the second salient pole group and the fifth salient pole group, and the third salient pole group and the sixth salient pole group are mutually offset by 180 ° in mechanical angle. It is disposed so as to be located at a position (point symmetrical with respect to the rotation axis). A coil group corresponding to each of these six salient pole groups is attached, and a U-phase current is supplied to the first coil group and the fourth coil group, and V is applied to the second coil group and the fifth coil group. A phase current is supplied, and a W phase current is supplied to the third coil group and the sixth coil group.
Thus, the pair of salient pole groups, such as the first salient pole group and the fourth salient pole group, are disposed at positions mutually offset by a mechanical angle of 180 °, and correspond to the salient pole groups of these pairs, respectively. The in-phase current is supplied to the set of coils. For this reason, both salient-pole groups are excited across the rotation axis, and the salient-pole groups are arranged asymmetrically, which causes a bias in excitation and causes the rotor to be pulled to one side (a problem due to biased excitation It is possible to obtain a motor that rotates smoothly and stably without causing

  As described above, according to the present invention, it is possible to obtain a motor with a relatively large number of poles while suppressing the size and weight (while realizing the small size and the light weight). In addition, by increasing the number of poles, high torque can be output mainly at the time of startup and low speed operation. In this way, as a result, a motor having a relatively large number of poles, capable of outputting high torque, and suitable for direct drive while suppressing the size and weight (while realizing small size and light weight) Can be provided.

[2] In the first motor of the present invention, the distance between the adjacent salient poles is preferably in the range of 2.1 times to 3.0 times the diameter of the winding.

[Background Art] and [Invention Solved] in a motor with a narrow slot width such that the distance between adjacent salient poles is in the range of 2.1 times to 3.0 times the diameter of the winding. As mentioned in the paragraph of the problem to be solved, it has been difficult to realize this conventionally.
According to the first motor of the present invention described in the above [2], the distance between the adjacent salient poles is in the range of 2.1 times to 3.0 times the diameter of the winding. Even if the width is narrow relative to the diameter of the winding, the desired motor can preferably be realized.

[3] In the first motor of the present invention, the diameter Φ of the stator is in the range of 40 mm <Φ <200 mm, and the number of magnetic poles and / or the number of salient poles of the permanent magnet are 60 to 60 It is preferable to be in the range of 240.

While the diameter 磁極 of the stator is in the range of 40 mm <Φ <200 mm, the number of magnetic poles of the permanent magnet and / or the number of salient poles are in the range of 60 to 240, so to speak In many motors, as described in the [Background Art] and [Problems to be Solved by the Invention] paragraph, it has conventionally been difficult to realize this.
According to the first motor of the present invention described in [3], while the diameter Φ of the stator is in the range of 40 mm <Φ <200 mm, the number of magnetic poles of the permanent magnet and / or the number of the protrusions Even if the number of poles is in the range of 60 to 240, that is, even when the number of poles is large, a desired motor can be suitably realized.

[4] In the first motor of the present invention, preferably, the number of magnetic poles of the permanent magnet of the rotor is (6n ± 2).

  According to the first motor of the present invention described in [4], the number of salient poles is 6 n (where n is a natural number of 4 or more), and the number of magnetic poles possessed by the permanent magnet is (6 n ± 2) Since (a) the number of salient poles is even, smooth and stable rotation can be obtained without causing "problem due to biased excitation (see the above [1])". (A) Since the difference between the number of salient poles and the number of magnetic poles of the permanent magnet is 2, which is the smallest among the even numbers, the least common multiple of the number of salient poles and the number of magnetic poles of the permanent magnet is large It is possible to suppress the pulsation of so-called cogging torque.

[5] In the motor of the first aspect of the present invention, the number of magnetic poles of the permanent magnet of the rotor is (6n + 2), and in each of the first salient pole group to the sixth salient pole group, the protrusion The n salient poles belonging to the pole group are disposed while maintaining a mechanical angle of 360 ° / (6n + 1), and the salient pole group is selected from the n salient poles belonging to the salient pole group. Of the A salient pole located at the end of the and one of the n salient poles belonging to another salient pole group adjacent to the salient pole group, the B located at the end of the other salient pole group and adjacent to the A salient pole The salient poles are preferably disposed while maintaining a pitch of {360 ° / (6n + 1)} + 360 ° / (6n + 1) / 6 in mechanical angle.

Thus, assuming that the number of magnetic poles possessed by the permanent magnet is 6n + 2 and the salient poles belonging to the same salient pole group are arranged at a mechanical angle of 360 ° / (6n + 1) while maintaining the same pitch When the inside of the salient pole group is viewed locally, the number of salient poles per 360 ° per revolution can be converted into (6n + 1) (hereinafter referred to as the calculation basis for determining the arrangement pitch of the salient poles) Since the number of salient poles is referred to as “the number of salient poles”, the difference between “the number of pseudo salient poles” and the number of magnetic poles of the permanent magnet is 1 which is the minimum. Therefore, the "common number of pseudo salient poles" and the least common multiple of the number of magnetic poles of the permanent magnet can be further increased, and the pulsation of cogging torque can be further suppressed.
Here, if (6n + 1) division is carried out for 360.degree. Of the entire circumference and 6n salient poles are arranged at those division positions, the division is made in odd numbers, and therefore the pair of salient pole groups Salient poles belonging to the salient pole group) are not disposed at positions deviated from each other by 180 ° in mechanical angle. Therefore, more or less "problems due to biased excitation" remain in this case.
Therefore, in the first motor of the present invention described in [5], (d) an A salient pole located at an end of the salient pole group among n salient poles belonging to the salient pole group, and the salient pole Among the n salient poles belonging to another salient pole group adjacent to the polar group, the mechanical salient of the B salient pole located at the end of another salient pole group and adjacent to the A salient pole is {360 ° / ( It arrange | positions keeping the pitch of (6n + 1)} + 360 degree / (6n + 1) / 6 mutually. By this configuration, the pair of salient pole groups (as a result, salient poles belonging to those salient pole groups) are exactly 180 ° apart from each other while eliminating the empty pitch for one salient pole. It is possible to obtain a motor that can be smoothly and stably rotated, which can be disposed at a different position, suppressing the "problem due to biased excitation".

[6] A second motor according to the present invention comprises: a rotor having permanent magnets in which magnetic poles of N and S poles are alternately arranged along the circumferential direction; A stator having poles, wherein the plurality of salient poles are arranged along a circumferential direction, and a tip surface of the salient poles is formed to face a surface on which the magnetic poles of the permanent magnet are arrayed; The number of the salient poles of the stator is 3 mn (where m is a natural number of 2 or more, n is a natural number of 4 or more), and the n-th (in the stator) 3k-2) A (3k-2) salient pole group configured by salient poles, a (3k-1) salient pole group configured by n pieces of (3k-1) salient poles, and n pieces The (3k) salient pole group constituted by the (3k) salient poles is arranged in this order in the circumferential direction of the stator. (Where k is a natural number from 1 to m) and connected in series to the n third (3k-2) salient poles of the (3k-2) salient pole group. A third (3k-2) coil group consisting of n number of the coils is mounted, and is connected in series to the nth (3k-1) salient poles of the (3k-1) salient pole group A third (3k-1) coil group consisting of the n number of the coils is mounted, and the nth (3k) salient poles of the (3k) salient pole group are connected in series. A third (3 k) coil group consisting of n pieces of the coils is mounted, U-phase current is supplied to the (3 k-2) coil group, and V is applied to the (3 k-1) coil group. Phase current is supplied, and W-phase current is supplied to the (3k) th coil group, and each salient pole is flat along the radial direction of the stator. In each of the first salient pole group to the (3 m) salient pole group, the coils are formed in a straight shape so that the winding directions are opposite to each other between the adjacent salient poles. The coil is attached between the adjacent salient poles and is passed on the tip side or the base end side of the salient pole by a crossover which is a part of a winding constituting the coil, and the crossover Is characterized in that the relation between the distal end side and the proximal end side is reversed between the adjacent slots.

In the stator, a (3k-2) salient pole group constituted by n (3k-2) salient poles, and a (3k-1) projection constituted by n nth (3k-1) salient poles The pole group and the (3k) salient pole group constituted by the n (3k) salient poles are arranged in this order along the circumferential direction of the stator (where k is 1 to 6). a natural number up to m). In addition, in order to correspond to these salient pole groups, the n third coils of (3k-2) salient pole group of the (3k-2) salient pole group are formed of n coils connected in series. (3k-2) The coil group is mounted. In addition, a third (3k-1) coil group consisting of n coils connected in series is attached to the nth (3k-1) salient poles of the (3k-1) salient pole group . Furthermore, a third (3 k) coil group consisting of n coils connected in series is attached to the n third (3 k) salient poles of the (3 k) salient pole group.
In the motor having such a configuration, a force acts on m points in one 360 ° around the rotation axis RA of the rotor by excitation in each drive phase.
Therefore, in the second motor of the present invention, the number of salient pole groups or / and the number of coil groups is increased not only to six but to nine, twelve, fifteen, ..., 3 m. By adopting the above, it is possible to disperse the force F.beta. Attracted to the rotor 20 toward the rotation axis RA at m points, so that the motor can be further reduced in vibration or / and noise.

[7] In the second motor of the present invention, it is preferable that the distance between the adjacent salient poles is in the range of 2.1 times to 3.0 times the diameter of the winding.

[8] In the second motor of the present invention, the diameter Φ of the stator is in the range of 40 mm <Φ <200 mm, and the number of magnetic poles of the permanent magnet and / or the number of salient poles is 60 to 240. It is preferable to be in the range of

[9] In the second motor of the present invention, the number of magnetic poles of the permanent magnet of the rotor is (3 mn ± m) (however, m and n are selected so that 3 mn ± m is an even number) Is preferred).

[10] It is preferable that the first motor and the second motor of the present invention be used for direct drive.

A direct drive motor can output high torque at startup and low speed operation, and it is expected that smooth and stable rotation can be obtained.
In the motor according to the present invention, (a) the number of poles is relatively large, (b) the salient pole groups excited in the same phase are arranged in pairs at a mechanical angle 180 ° apart from each other (c 2.) The number of magnetic poles of the permanent magnet of the rotor and the number of salient poles have a predetermined relationship (for example, the arrangement pitch of the permanent magnets and the arrangement pitch of the salient poles have a predetermined relationship) High torque can be output also at the time of start-up or low speed operation, and the pulsation of vibration and cogging torque is suppressed, and smooth and stable rotation can be obtained. For this reason, according to the invention described in the above [10], a motor suitable for direct drive can be provided.

[11] The method of manufacturing a motor according to any one of the above [1] to [10] according to the present invention defines an axis parallel to the longitudinal direction of a rod-like coil manufacturing jig as an x axis, x When an axis perpendicular to the axis is defined as y axis and an axis perpendicular to each of x axis and y axis is defined as z axis, when the yz plane is planarly viewed along the x axis, And a j-th coil forming step (where j is any natural number from 1 to n-2) of forming the j-th coil by winding the winding t times so as to turn in the first rotation direction. A step of forming a jth crossover wire for forming a jth crossover wire which is a portion passing between the jth coil and the (j + 1) th coil so as to turn the winding half turn in the first rotation direction; The (j + 1) th coil is wound t turns of the winding so as to turn in the first rotation direction with respect to the jig. Forming an (j + 1) th coil forming step, and an (j + 1) th coil serving as a portion passing between the (j + 1) th coil and the (j + 2) th coil so as to turn the winding a half turn in the first rotation direction. A winding step of winding the winding on the coil manufacturing jig so as to form a plurality of coils connected in series, having a (j + 1) crossover wire forming step of forming a crossover wire; And a coil separation step for separating at least the coil j from the coil manufacturing jig, and an inner diameter of the jth coil and an inner diameter of the (j + 1) th coil seen from the same direction. A part of an i-th coil group (where i is a natural number from 1 to 3 m, m is a natural number of 2 or more) including at least a j-th crossover wire bending step for bending at least a part and comprising a plurality of coils Or with all Coil shaping step of shaping the coil, and coil fitting step of fitting each coil belonging to the i th coil group to the corresponding i th salient pole among the i th salient pole group in the stator , And is characterized.

  According to the method of manufacturing a motor of the present invention, in the winding step, a plurality of coils belonging to the i-th coil group are collectively formed in series as wound around a coil manufacturing jig, and the i-th coil group is formed In the shaping step, the coil is shaped to be easily fitted into the salient pole, and then in the coil fitting step, a series of shaped coils are fitted together and the coil is mounted on the salient pole. For this reason, the coil is not attached as the winding is directly wound on the salient pole while pushing the winding into the bottom of the slot, and it is easily and efficiently suitable for mass production even if the width of the slot is narrow. In form, the coil can be attached to the salient pole.

  Further, according to the motor manufacturing method of the present invention, the formation of the jth coil in which the winding is wound t times with respect to the coil manufacturing jig, and the formation of the jth crossover wire in which the winding is made half turn The formation of the (j + 1) th coil in which the winding is wound t times and the formation of the (j + 1) crossover wire in which the winding is made to be half turn are all without changing the winding direction halfway. Since the winding is performed in the same direction as the first rotation direction, the winding process can be performed efficiently in a form suitable for mass production.

[12] In the method of manufacturing a motor according to the present invention, the coil manufacturing jig includes a fitting portion disposed inside of a coil to be formed, and the fitting portion is planarly viewed in the yz plane along the x axis. In the winding step, the dimension in the longitudinal direction of the fitting portion is a first dimension, and in the jth coil separation step in the i-th coil group shaping step, the dimension of the fitting portion is the first dimension. It is preferable to change the second dimension smaller than the first dimension to separate the jth coil from the fitting portion.

  According to the method of manufacturing a motor described in the above [12], in the j-th coil separation step, the fitting portion is changed to a second dimension smaller than the first dimension maintained in the winding process and the width is By narrowing, a gap can be created between the inside of the coil and the outside of the fitting. Therefore, the coil can be easily separated, and the j-th coil separation step can be performed in a form more suitable for mass production without breaking the shape of the coil at the time of coil separation. it can.

FIG. 1 is a perspective view shown to explain a motor 10 according to a first embodiment. FIG. 1 is a cross-sectional view shown to explain a motor 10 according to a first embodiment. FIG. 2 is a view showing the main parts for explaining the motor 10 according to the first embodiment. FIG. 7 is a view for explaining the dimensional relationship of the salient pole 40, the slot SL, and the winding 58 in the first embodiment. FIG. 2 is a circuit diagram shown to explain connection relationships for driving the motor 10 according to the first embodiment. FIG. 3 is a view for explaining a state in which the motor 10 according to the first embodiment is driven. 5 is a flowchart shown to explain a method of manufacturing the motor 10 according to the first embodiment. FIG. 6 is a view for explaining a method of manufacturing the motor 10 according to the first embodiment. FIG. 7 is a view shown to explain a change in dimension of the fitting portion 610 in the method of manufacturing the motor 10 according to the first embodiment. FIG. 7 is a view for explaining an arrangement relationship of salient poles 40 and permanent magnets 24 of a motor 12 according to a second embodiment. FIG. 7 is a circuit diagram shown to explain connection relationships for driving a motor 12 according to a second embodiment. FIG. 8 is a view for explaining how a motor 12 according to a second embodiment is driven. FIG. 14 is a view for explaining an arrangement relationship of salient poles 40 and permanent magnets 24 of a motor 13 according to a third embodiment. FIG. 5 is a view for explaining an arrangement relationship of the salient pole 40 and the permanent magnet 24 of the motor 10 according to the first embodiment. FIG. 18 is a view for explaining the arrangement of salient poles 40 of the motor 10 a according to the fifth embodiment. It is a figure shown in order to demonstrate the conventional motor 900. FIG.

  Hereinafter, a motor and a method of manufacturing the motor of the present invention will be described in detail based on an embodiment shown in the drawings. Note that each drawing in the drawings is a schematic view, and the size of each component, the size ratio between each component, and the like do not necessarily reflect the actual one exactly.

Embodiment 1
1. Basic Structure of Motor 10 According to Embodiment 1 FIGS. 1 to 4 are views for explaining the motor 10 according to the embodiment 1. FIG. FIG. 1A is a perspective view of the motor 10 in a disassembled state. FIG. 1B and FIG. 1C are perspective views of a state in which the rotor 20 and the stator 30 are combined. FIG. 2 is a cross-sectional view taken along a line A-A when the motor 10 in FIG. 1C is cut along a plane indicated by A-A. FIG. 3A is a view showing the arrangement of the salient poles 40 in plan view of the motor 10 along the rotation axis RA. In addition, a part of the permanent magnet 24 is also shown. The boundaries between the first salient pole group 41G to the sixth salient pole group 46G are indicated by alternate long and short dashed lines for the sake of convenience. FIG. 3B is a view showing the first salient pole group 41G, the first coil group 51G, and the permanent magnet 24 in a plan view of the motor 10 along the rotation axis RA. FIG. 4 is a figure shown in order to demonstrate the dimension relationship of the salient pole 40 in Embodiment 1, slot SL, and the coil | winding 58. FIG. 4 (a) is an enlarged view of FIG. 3 (b), and FIG. 4 (b) is a perspective view of only the salient pole 40 taken from the outside of the circumference of the motor 10. As shown in FIG. In addition, for the part using the code common to each part like the 1st salient pole 41, the connecting wire 59, the slot SL etc., a code is attached about a part of parts and a code is omitted in other parts. There is a thing to do (following, same).

  As shown in FIGS. 1 and 2, the motor 10 according to the first embodiment includes a rotor 20 having a permanent magnet 24 and a plurality of salient poles 40 on each of which a coil 50 is mounted. And a stator 30 formed such that the poles 40 are arranged along the circumferential direction, and the tip surfaces of the salient poles 40 face the surface on which the magnetic poles of the permanent magnet 24 are arrayed.

The permanent magnets 24 are arranged on the inner circumferential surface of the rotor main body 22 by alternately arranging magnetic poles of N poles and S poles at substantially equal pitches along the circumferential direction in which the motor 10 rotates (see FIG. 3). (See FIG. 1 (a) and FIG. 2).
The salient pole 40 is a portion around which the coil 50 is wound, and is a portion separately referred to as an iron core or a core. The salient pole 40 is connected to the stator base 32. The tip end face of the salient pole 40 and the permanent magnet 24 face each other with a gap of the air gap AG (see FIG. 2).
A bearing 26 is disposed around the rotation axis RA of the rotor body 22, and the bearing 26 is in contact with the stator 30. From the motor 10, a power lead wire 60 for supplying a current to the coil 50 and a signal lead wire 70 for transmitting a signal such as a Hall element (not shown) are drawn out (see FIGS. 1 and 2).

2. Detailed Structure of Motor 10 According to Embodiment 1 (1) Salient Pole Group The number of salient poles 40 of the stator 30 is 6 n in total (n is a natural number of 4 or more). For example, the stator 30 shown in FIG. 3 has n = 11 and has 66 salient poles 40 in total.
These salient poles 40 are virtually divided into six salient pole groups. That is, as shown in FIG. 3A, in the stator 30, a first salient pole group 41G constituted by n first salient poles 41 and a second constituted by n second salient poles 42 A salient pole group 42G, a third salient pole group 43G composed of n third salient poles 43, a fourth salient pole group 44G composed of n fourth salient poles 44, an n fifth salient pole A fifth salient pole group 45G constituted by 45 and a sixth salient pole group 46G constituted by n sixth salient poles 46 are disposed in this order along the circumferential direction of the stator 30 There is. In FIG. 3A, the first salient pole group 41G to the sixth salient pole group 46G are defined in the CW direction (clockwise direction) toward the paper surface. The first salient pole group 41G and the fourth salient pole group 44G, the second salient pole group 42G and the fifth salient pole group 45G, and the third salient pole group 43G and the sixth salient pole group 46G are machines. They are disposed at positions angularly offset from each other by 180 ° (point symmetrical with respect to the rotation axis RA).

(2) Coil Group As shown in FIG. 3B, the first coil group 51G of n coils connected in series is connected to the n first salient poles 41 of the first salient pole group 41G. It is attached. That is, in the case of mounting the coils by distributed winding of the winding, or in the case of mounting the coils by winding the coils so that the coils supplied with U-phase, V-phase and W-phase currents are sequentially adjacent. However, n coils are connected in series (in other words, series / cascade) to form one coil group.
Similarly to the first coil group 51G, the second coil group 52G to the sixth coil group 56G are also connected to n second salient poles 42 of the second salient pole group 42G by n coils connected in series. A second coil group 52G is mounted, and a third coil group 53G consisting of n coils connected in series is mounted on n third salient poles 43 of the third salient pole group 43G. A fourth coil group 54G consisting of n coils connected in series is attached to the n fourth salient poles 44 of the fourth salient pole group 44G, and the nth fifth salient pole group 45G A fifth coil group 55G consisting of n coils connected in series is attached to the fifth salient poles 45, and the n sixth salient poles 46 of the sixth salient pole group 46G A sixth coil group 56G consisting of n coils connected in series is mounted. << not shown in FIG. 3 (b) <<>>

  The U-phase current is supplied to the first coil group 51G and the fourth coil group 54G, the V-phase current is supplied to the second coil group 52G and the fifth coil group 55G, and the third coil group 53G and The W-phase current is supplied to the sixth coil group 56G. << Refer to the display of the U-phase, the V-phase and the W-phase in FIG. 3 (a). << >> That is, the pair of salient pole groups are disposed at positions offset from each other by a mechanical angle of 180 ° to supply in-phase current. The pair of salient pole groups are excited at the same timing across the rotation axis RA.

  In the motor 10 according to the first embodiment, the first coil group 51G and the fourth coil group 54G are connected in series, and the second coil group 52G and the fifth coil group 55G are connected in series. The coil group 53G and the sixth coil group 56G are connected in series (see FIG. 5).

(3) Shape of Salient Poles The salient poles 40 (in the salient poles in each salient pole group, the symbols are attached as 41 to 46. The same applies to the following) on which the coil 50 is mounted. It is formed in a flat shape that is flat along the direction (see FIGS. 1 to 4).
Here, the “straight salient pole” is different in shape from the so-called umbrella salient pole (see FIG. 16) in which the width of the tip is wider than the width of the base end of the salient pole (see FIG. 16). It shall point to a salient pole. It is preferable that the straight salient pole 40 has no special recess or protrusion and is flat along the radial direction of the stator 30. The tip of the salient pole 40 may be formed to be the same plane from the proximal end, or the width of the tip of the salient pole 40 is slightly smaller than the width of the proximal end, and the side surface of the salient pole 40 is tapered as a whole. It may be formed as follows. The taper may be formed linearly or in a gentle curve.
Since the motor 10 according to the first embodiment adopts such a salient pole structure, for example, the needle guiding the winding can be easily inserted to the back of the slot, or it is wound in advance. The coil is easily fitted into the salient pole.

(4) Mounting structure of coil As shown in FIG. 3 (b), in each of the first salient pole group 41G to the sixth salient pole group 46G, when the coil 50 is viewed locally in each salient pole group The adjacent salient poles are attached to the salient poles such that the winding directions are opposite to each other.
For example, when viewed from the outside of the circumference around which the motor 10 rotates in the direction of the rotation axis RA (-r direction), the winding direction of the coil 511 is CW, and the winding direction of the coil 512 is CCW. The winding direction of the coil 513 is a CW direction, and the winding direction of the coil 514 is a CCW direction. The subsequent coils 51 j are also in the winding direction according to the same rule.
By doing this, when the current of the same phase flows in the coil group, the magnetic poles of the N pole and the S pole appear alternately at the tip side of the salient pole attached to the coil (temporarily, in FIG. When a current flows from the coil 511 of the first coil group 51G in the direction of the coil 5111, the S pole is on the tip side of the salient pole mounted on the coil 511 and the N side on the tip side of the salient pole mounted on the coil 512. It appears like a pole.).

Further, as shown in FIG. 3B, in each of the first salient pole group 41G to the sixth salient pole group 46G, the coil 50 is one of the windings 58 forming the coil 50 between the adjacent salient poles. The salient pole 40 << FIG. 3 (b) is attached | subjected with the code | symbol 41 by the connecting wire 59 which is a part. The same applies below. The crossover wires 59 are passed at the distal end side or the proximal end side of the >>, and the relationship between the distal side or the proximal side between the adjacent slots SL is reversed.
For example, the crossover wire 59 is passed at the proximal end side of the salient pole in the corresponding slot SL between the coil 511 and the coil 512, and at the distal end side of the salient pole in the corresponding slot SL between the coil 512 and the coil 513. Are alternately passed distally or proximally such that they are passed proximally of the salient poles in the corresponding slots SL between the coils 513 and 514.
Here, the distal end side of the salient pole 40 refers to the side (r direction) toward the outside of the circumference on which the motor 10 rotates from the rotation axis RA, and the proximal end side of the salient pole 40 refers to the rotation of the motor 10 It means the side of the direction (-r direction) toward the rotation axis RA from the outside of the circumference.

(5) Dimensions
In the motor 10 according to the first embodiment, when the diameter of the stator 30 is Φ (see FIG. 2), the diameter Φ of the stator 30 is in the range of values larger than 40 mm and smaller than 200 mm, and permanent magnets The number of magnetic poles 24 and / or the number of salient poles 40 are in the range of 60 to 240.
Further, as shown in FIGS. 4A and 4B, in the motor 10 according to the first embodiment, the distance W1 between the adjacent salient poles 40 is 2.1 times the diameter φ1 of the winding 58. It is within the range of ~ 3.0 times.
Further, when viewed along the −r direction, the salient pole 40 in the first embodiment has a length L1 in a direction perpendicular to the length L2 in the circumferential direction of the motor 10 longer than the length L2 in the circumferential direction. There is.

(6) Relationship between the Number of Salient Poles and the Number of Magnetic Poles of Permanent Magnets The motor 10 according to the first embodiment has 6 n salient poles, but the number of magnetic poles of the permanent magnet 24 of the rotor 20 is (6n ± 2) It has become one.

(7) Application of motor 10
The motor 10 according to the first embodiment is mainly used for direct drive.

3. Driving of the Motor 10 According to Embodiment 1 FIG. 5 is a circuit diagram shown to explain a wire connection for driving the motor 10 according to Embodiment 1. As shown in FIG. FIG. 6 is a view for explaining how the motor 10 according to the first embodiment is driven (set as n = 11). In the first salient pole group 41G to the sixth salient pole group 46G, the salient pole groups excited by the current flowing through the corresponding coil group are shaded. Further, in the n salient poles and the permanent magnet 24 related to the excited salient pole group, the shade of shading is changed in accordance with the polarity (N pole and S pole).

  Although any method may be employed to drive the motor 10, for example, in the first embodiment, as shown in FIGS. 5 and 6, the drive circuit is configured as a so-called star connection drive circuit and is operated. The driving method is to apply a rotating magnetic field to the first salient pole group 41G to the sixth salient pole group 46G.

In the drive circuit according to the first embodiment, as shown in FIG. 5, one end of a first coil group 51G and one end of a fourth coil group 54G are connected, one end of a second coil group 52G and one end of a fifth coil group 55G. Are connected, one end of the third coil group 53G and one end of the sixth coil group 56G are connected, the other end of the first coil group 51G is connected to the node Nu, and the other end of the second coil group 52G is a node The other end of the third coil group 53G is connected to the node Nw, and the other end of the fourth coil group 54G, the other end of the fifth coil group 55G, and the other end of the sixth coil group 56G are connected to the node Nn. It is connected. Switches S1 and S2, switches S3 and S4, and switches S5 and S6 are connected in series between the high potential side and the low potential side of the power source E, respectively. Furthermore, the connection node of switches S1 and S2 is connected to node Nu, the connection node of switches S3 and S4 is connected to node Nw, and the connection node of switches S5 and S6 is connected to node Nv.
As described above, the drive circuit is configured as a circuit in which the first coil group 51G to the sixth coil group 56G are connected in a so-called star connection, and the switches S1 to S6 are appropriately ON / OFF controlled to provide the nodes Nu, Nv and As shown in FIG. 6, a rotating magnetic field is applied by causing current to flow between two nodes selected from among three nodes at node Nw.
Specifically, in the first phase, current is applied to the coil group (the first coil group 51G, the second coil group 52G, the fourth coil group 54G, and the fifth coil group 55G) corresponding to the U phase and the V phase. The first salient pole group 41G, the second salient pole group 42G, the fourth salient pole group 44G, and the fifth salient pole group 45G are excited << see FIG. 6 (1). <<>> In the same phase, the pair of salient pole groups are excited across the rotation axis RA at the same timing (the same applies to the subsequent phases).
Next, in the second phase, current is applied to the coil group (the second coil group 52G, the third coil group 53G, the fifth coil group 55G, and the sixth coil group 56G) corresponding to the V phase and the W phase. The salient pole group 42G, the third salient pole group 43G, the fifth salient pole group 45G and the sixth salient pole group 46G are excited << see FIG. 6 (2). <<>>
Similarly, after the third phase, the coil group to which current flows is shifted in the CW direction every time the phase changes, and the salient pole group to be excited is shifted in the CW direction. When the drive to the sixth phase is finished, the first magnetic field is returned to the first phase and the same drive is repeated to apply a rotating magnetic field to the first salient pole group 41G to the sixth salient pole group 46G. With these drives, the rotor 20 rotates.

4. Operation and effect of motor 10 according to the first embodiment (1) Operation and effect by increasing the number of poles When the number of poles of motor 10 (the number of permanent magnet poles and / or the number of salient poles) is set relatively large The angle at which the rotor 20 has to be rotated per excitation switching (the phase switching in the driving method of the motor 10 described above) is smaller than in the case where the number of poles is small. As a result, it is possible to increase the starting torque, for example, low gear in a vehicle.
In addition, when the number of poles is set to a large number, the thickness of the permanent magnet 24 can be conversely reduced because of the permeance as the arrangement pitch of the magnetic poles becomes narrower. By thinning the permanent magnet 24 in this manner, the motor 10 can be reduced in size and weight. In addition, since the permanent magnets 24 arranged in the circumferential direction of the rotor 20, which is a rotating body, are reduced in weight, they can contribute to quick acceleration and deceleration.

(2) Coexistence of increasing the number of poles and downsizing and weight reduction However, increasing the number of poles and achieving high torque generally leads to upsizing and weightening of the motor as described above. .
Therefore, in the motor 10 according to the first embodiment, each salient pole 40 is formed in a flat shape that is flat along the radial direction (r direction) of the stator 30, and each coil 50 is attached to each salient pole 40. On the other hand, (a) coil 50 is attached to salient pole 40 in a state in which the winding directions are opposite to each other between adjacent salient poles, and (b) coil 50 is between adjacent salient poles And the crossover wire 59 which is a part of the winding 58 constituting the coil at the tip end side or the base end side of the salient pole 40, and the crossover wire 59 is between adjacent slots SL. So that the distal or proximal relationship is reversed. And (c) n coils 50 having the regularity of the above (a) and (b) are connected in series to constitute an ith coil group 5iG (where, i is a natural number from 1 to 6). .
With such a structure of the salient pole 40 and the coil 50, as a result of increasing the number of poles relatively, it is possible to output a high torque while realizing a relatively small motor with a narrow slot width. Can be provided.

(3) Shortening of the Winding Wire 58 In the motor 10 according to the first embodiment, for example, the n first salient poles 41 of the first salient pole group 41G are n coils 50 connected in series. One coil group 51 G is mounted, and the coil 50 is located on the tip end side of the first salient pole 41 or by the connecting wire 59 which is a part of the winding 58 constituting the coil 50 between the adjacent first salient poles 41. Passed proximally. That is, the coil group relating to one phase is connected in series in series and attached to n salient poles relating to one group, and a crossover is between the adjacent salient poles It has been passed.
For this reason, in the case of distributed winding, or in the case where the coils to which the U-phase, V-phase and W-phase currents are supplied are arranged adjacent to each other in the circumferential direction in order. Unlike the above, it is possible to miniaturize the motor without the need to provide a space for winding the winding separately. In addition, since the length of the crossover can be minimized, the total length of the winding can be shortened, and the weight of the motor can be reduced. In addition, it is possible to suppress the resistance value when the winding is totally extended, and to improve the energy efficiency of the motor.

(4) Excitation with a point-symmetrical relationship centered on the rotation axis RA In the motor 10 according to the first embodiment, the first salient pole group 41G constituted by n first salient poles 41, n A second salient pole group 42G configured by the second salient poles 42, a third salient pole group 43G configured by the n third salient poles 43, and a fourth pole 44 configured by the n fourth salient poles 44 A salient pole group 44G, a fifth salient pole group 45G composed of n fifth salient poles 45, and a sixth salient pole group 46G composed of n sixth salient poles 46 are arranged in this order as a stator. It is disposed along the 30 circumferential directions. The first salient pole group 41G and the fourth salient pole group 44G, the second salient pole group 42G and the fifth salient pole group 45G, and the third salient pole group 43G and the sixth salient pole group 46G have mechanical angles respectively. It is disposed so as to be positioned 180 degrees apart from each other (point symmetrical with respect to the rotation axis RA). A coil group corresponding to each of these six salient pole groups is mounted, and a U-phase current is supplied to the first coil group 51G and the fourth coil group 54G, and the second coil group 52G and the fifth coil The group 55G is configured to be supplied with a V-phase current, and the third coil group 53G and the sixth coil group 56G are supplied with a W-phase current.
Thus, the pair of salient pole groups such as the first salient pole group 41G and the fourth salient pole group 44G are disposed at positions mutually offset by a mechanical angle of 180 °, and correspond to the respective salient pole groups of these pairs. Since in-phase current is supplied to the coil group, both salient pole groups are excited across the rotation axis RA, and the motor rotates smoothly and stably without causing "problem due to biased excitation". You can get

  As can be understood from the above (1) to (4), according to the motor 10 according to the first embodiment, the motor having a relatively large number of poles while suppressing the size and weight (while realizing the small size and the light weight) You can get In addition, by increasing the number of poles, high torque can be output mainly at the time of startup and low speed operation. In this way, as a result, a motor having a relatively large number of poles, capable of outputting high torque, and suitable for direct drive while suppressing the size and weight (while realizing small size and light weight) Can be provided.

(5) In the motor 10 according to the first embodiment, the first coil group 51G and the fourth coil group 54G are connected in series, and the second coil group 52G and the fifth coil group 55G are connected in series. The three coil group 53G and the sixth coil group 56G are connected in series.
If, for example, the first coil group 51G and the fourth coil group 54G are connected in parallel, one end of each coil group is connected to be concentrated at the node of the power lead wire, respectively, and The other ends of the coil groups of are connected to different nodes.
On the other hand, according to the motor 10 of the first embodiment, two coil groups (in the above example, the first coil group 51G and the fourth coil group 54G) having a point-symmetrical relationship with respect to the rotation angle. Since the series connection is performed, the concentrated connection to the specific node as described above is eliminated, and the wiring space can be saved and the size and the weight can be further reduced as compared with the case where they are connected in parallel.

(6) Conventionally, the number of magnetic poles of the permanent magnet and / or the number of salient poles are in the range of 60 to 240 while the diameter ス テ ー タ of the stator is in the range of 40 mm <Φ <200 mm. In a motor with a large number of poles, it was difficult to realize this.
According to the motor 10 of the first embodiment, the number of magnetic poles of the permanent magnet and / or the number of salient poles is 60 to 240 while the diameter 有 す る of the stator is in the range of 40 mm <Φ <200 mm. Even in the case where the number of poles is within such a range, the desired motor can be suitably realized.

(7) In the case of a motor with a narrow slot, such as in the prior art, where the spacing between adjacent salient poles is within the range of 2.1 times to 3.0 times the diameter of the winding, this is to be realized It was difficult.
According to the motor 10 of the first embodiment, the width of the slot corresponds to the diameter of the winding such that the distance between the adjacent salient poles is in the range of 2.1 times to 3.0 times the diameter of the winding. Even in the case where the width is narrow, the desired motor can be suitably realized.
In the first embodiment, in the slot SL, the windings 58 are not wound so as to overlap one another, but are single-wound. The single winding allows the winding 58 to be accommodated relatively easily and the coil 50 can be attached to the salient pole 40 even if the slot SL is extremely narrow.

(8) The salient pole 40 in the first embodiment has a length L1 in the direction perpendicular to the circumferential length of the motor 10 longer than the length L2 in the circumferential direction when viewed along the -r direction. ing. For this reason, even when the number of poles is increased and L2 is necessarily decreased, L1 is longer than L2, so the area of the tip of the salient pole 40 and facing the permanent magnet 24 is appropriately set. Therefore, the torque can be increased even though the number of poles is large.

(9) According to the motor 10 of the first embodiment, the number of salient poles is 6 n, and the number of magnetic poles of the permanent magnet is (6 n ± 2). Thus, smooth and stable rotation can be obtained without causing "problems due to biased excitation". (A) Since the difference between the number of salient poles and the number of magnetic poles of the permanent magnet is 2 which is the smallest among the even numbers, the least common multiple of the number of salient poles and the number of magnetic poles of the permanent magnet is increased. It is possible to suppress the pulsation of so-called cogging torque. By suppressing the pulsation of the cogging torque, not only the vibration can be suppressed, but also the energy loss can be suppressed and the torque at the start can be increased. Also, smooth and stable rotation can be obtained.

(10) The motor for direct drive can output high torque at startup and low speed operation, and it is expected that smooth and stable rotation can be obtained.
According to the motor 10 of the first embodiment, (a) the number of poles is relatively large, (b) the salient pole groups excited in the same phase are disposed in pairs at positions displaced by a mechanical angle of 180 ° from each other. (C) The number of magnetic poles of the permanent magnet 24 of the rotor 20 and the number of salient poles have a predetermined relation (the arrangement pitch of the permanent magnets 24 and the arrangement pitch of the salient poles 40 have a predetermined relation Due to reasons such as the above, high torque can be output even at the time of start-up and low speed operation, and pulsation of vibration and cogging torque can be suppressed, and smooth and stable rotation can be obtained. For this reason, according to the motor 10 according to the first embodiment, a motor suitable for direct drive can be provided.

5. Method of Manufacturing Motor 10 According to Embodiment 1 Next, a method of manufacturing the motor 10 according to Embodiment 1 will be described.
FIG. 7 is a flowchart shown to explain the method of manufacturing the motor 10 according to the first embodiment. FIG. 8 is a figure shown in order to demonstrate the manufacturing method of the motor 10 which concerns on Embodiment 1. FIG. FIG. 9 is a figure shown in order to demonstrate the change of the dimension of the fitting part 610 in the manufacturing method of the motor 10 which concerns on Embodiment 1. FIG.

As shown in FIG. 7, the method of manufacturing the motor according to the first embodiment includes a winding step S100, an ith coil group shaping step S200, and a coil fitting step S300. Here, i is a natural number from 1 to 6.
Below, the manufacturing method of the motor 10 which concerns on Embodiment 1 is demonstrated along each process.

(1) Winding step S100
The winding step S100 includes at least the jth coil formation step S110, the jth crossover line formation step S120, the (j + 1) th coil formation step S130, and the (j + 1) th crossover line formation step S140 in this order See Figure 7). Note that j is a natural number from 1 to n-2.
In the jth coil forming step S110, an axis parallel to the longitudinal direction of the rod-like coil manufacturing jig 600 is defined as an x axis, an axis perpendicular to the x axis is defined as ay axis, and the x axis and the y axis are respectively defined. When the vertical axis is defined as the z-axis, the coil 58 is rotated in the first rotational direction WS1 with respect to the coil manufacturing jig 600 when the yz plane is viewed in plan along the x-axis. The third coil is wound to form the jth coil 50 j (see FIG. 8A). <<>>
In the j-th crossover wire forming step S120, the j-th crossover wire serving as a portion passing between the j-th coil 50j and the (j + 1) th coil 50j + 1 so as to turn the winding 58 a half turn in the first rotation direction WS1. Form 59j << See FIG. 8 (a). <<>> In FIG. 8A, the first coil 501 and the second coil 502 << FIG. 8A are not shown. It illustrates the formation of a first crossover 591 which is a part passing between the two.
In the (j + 1) th coil forming step S130, the winding 58 is wound t times to form the (j + 1) th coil 50j + 1 so as to turn around in the first rotation direction WS1 with respect to the coil manufacturing jig 600 << See FIG. 8 (b). <<>>
In the (j + 1) th crossover wire forming step S140, the winding 58 is turned a half turn in the first rotation direction WS1 to pass between the (j + 1) th coil 50j + 1 and the (j + 2) th coil 50j + 2. The (j + 1) th crossover line 59j + 1 is formed (see FIG. 8B). <<>>
By performing the above-described winding step S100, the winding 58 can be wound around the coil manufacturing jig 600 so as to form a plurality of coils connected in series. << FIG. 8 (b) reference. <<>>

(2) i-th coil group shaping step S200
The ith coil group shaping step S200 has at least the jth coil separation step S210 and the jth crossover bending step S220 in this order (see FIG. 7).
In the j-th coil separation step S210, the j-th coil 50j is separated from the coil manufacturing jig 600.
In the jth crossover bending step S220, at least a portion of the jth crossover 59j is bent so that the inner diameter of the jth coil 50j and the inner diameter of the (j + 1) th coil 50j + 1 can be seen from the same direction. In FIG. 8C, while separating the first coil 501 from the coil manufacturing jig 600, at least the first one of the first crossover wires 591 so that the inner diameter of the first coil 501 can be seen from the same direction (−z direction). A state in which the side of the coil 501 is bent is illustrated.
Thus, by performing at least the j-th coil separation step S210 and the j-th crossover wire bending step S220, a plurality of coils can be shaped as part or all of the i-th coil group 5iG << See 8 (d). <<>> In FIG. 8D, at least a part of each of the first crossover wires 591 to the eighth crossover wires 598 is bent for each of the nine coils as an example, and each of the first coil 501 to the ninth coil 509 is It is illustrated that the i-th coil group 5iG is shaped such that the inner diameter of the i-th coil can be seen from the -z direction.

(3) Coil fitting step S300
In the coil fitting step S300, the respective coils 50j belonging to the i-th coil group 5iG are fitted to the corresponding i-th salient pole 4i of the i-th salient pole group 4iG in the stator 30 << FIG. 8 (e) And FIG. 8 (f). In the drawing, only a part of the coils belonging to the i-th coil group 5iG are illustrated, and the other coils are omitted. <<>>

  By repeatedly performing (1) the winding step S100, (2) the i-th coil group shaping step S200 and (3) the coil fitting step S300 as needed, the number of 6n coils 50 is 6n. Each is attached to the salient pole 40.

In addition, although the coil manufacturing jig 600 is comprised from the fitting part 610 which consists of a rod-shaped 2 solid material in Embodiment 1 (refer FIG. 8), it is not limited to this, The motor 10 of this invention Any material, material, structure, etc. may be used as long as the manufacturing method of the present invention can be implemented. For example, as a modification of the structure shown in FIG. 9 (b), it is possible to form an individual rectangular or substantially elliptical shape when viewed along the x-axis (illustration is omitted).
The first rotation direction WS1 is the CW direction as viewed along the x-axis in the first embodiment, but the method of manufacturing the motor 10 of the present invention is not limited to this. The first rotation direction WS1 may be a CCW direction.
Further, in the winding step S100 of the first embodiment, although the number of turns t per coil is illustrated and described as t = 4 in FIG. 8, this is the method of manufacturing the motor 10 of the present invention. It is not limited to For example, winding may be performed as t = 3.5 in 0.5 steps, or may be performed as t = 4.5. Furthermore, the value of t can be set and wound in another step, and thus the value of t can be appropriately selected according to various dimensions, required torque characteristics, required specifications, etc. it can. Further, in the winding step S100 of the first embodiment, the j-th connecting wire 59j is formed so as to half turn the winding 58. Although the winding 58 is wound approximately 0.5 times in FIG. 8, the half-time range is not limited to 0.5 times, and can be appropriately selected.
Further, in the j-th coil separation step S210, in the example of FIG. 8C, only the first coil 501 is separated from the coil manufacturing jig 600, and an example is shown in which the coils are separated one by one, The method of manufacturing the motor 10 of the present invention is not limited to this. For example, the coil manufacturing jig 600 may be separated in units of a plurality of coils, or may be separated from the coil manufacturing jig 600 in units of all the coils belonging to the i-th coil group 5iG.
Furthermore, the j-th coil separation step S210 and the j-th crossover wire bending step S220 may be successively performed for each coil, or the j-th coil separation step S210 and the j-th connection may be collectively performed for a plurality of coils. The line bending step S220 may be performed.

Moreover, although the example which implements winding winding process S100, i-th coil group shaping process S200, and coil insertion process S300 was shown about FIG. 8 about nine coils, it is limited in this invention in this. It is not a thing. For example, when the number of coils required for the i-th coil group 5iG corresponding to the i-th salient pole group 4iG is n, the i-th salient pole is determined as a number smaller than n (by dividing n) The winding step S100, the i-th coil group shaping step S200, and the coil fitting step S300 may be performed on a part of the coils necessary for the i-th coil group 5iG corresponding to the group 4iG. For example, when n = 20, these steps may be performed twice in 10 units.
In addition, it is preferable to perform the winding step S100 and the i-th coil group shaping step S200 for n coils necessary for the i-th coil group 5iG corresponding to the i-th salient pole group 4iG. For example, when n = 20, it is preferable to perform these steps collectively for 20 coils. By doing this, the coil necessary for the i-th coil group 5iG corresponding to the i-th salient pole group 4iG is divided, and after the coils are manufactured, the work of joining the divided coils in a later step is not performed. Since the coils necessary for the group can be manufactured collectively, the increase in resistance value caused by joining the coils can be prevented, and the number of processes can also be reduced.

6. Operation and Effect of the Method of Manufacturing the Motor 10 According to Embodiment 1 (1) According to the method of manufacturing the motor 10 according to Embodiment 1, the coil manufacturing jig 600 is wound in the winding winding step S100. A plurality of coils belonging to the i coil group 5iG are collectively formed in series, and the coil is shaped in a state easy to fit in the salient pole in the i-th coil group shaping step S200, and then shaped in advance in the coil fitting step S300. Insert a series of coils together and attach the coil to the salient pole. As a result, the coil is not attached by winding the winding directly on the salient pole while pushing the winding into the bottom of the slot as in the prior art, and even if the width of the slot is narrow, it is easily and efficiently The coil can be attached to the salient pole in a form suitable for mass production.

(2) According to the method of manufacturing the motor 10 of the first embodiment, the formation of the jth coil 50 j in which the winding 58 is wound t times around the coil manufacturing jig 600 is performed, and the winding is made half turn The winding direction is the formation of the jth crossover wire 59j, the formation of the (j + 1) th coil 50j + 1 in which the winding is t-turned, and the formation of the (j + 1) th crossover wire 59j + 1 in which the winding is half-turned. Is performed in the same manner as in the first rotation direction WS1 without changing in the middle. For this reason, winding winding process S100 can be implemented in the form suitable for mass production efficiently.

(3) Dimension change of the fitting portion 610 In the method of manufacturing the motor 10 according to the first embodiment described above, the coil manufacturing jig 600 includes the fitting portion 610 disposed inside the formed coil, and the fitting is performed. When the mounting portion 610 is planarly viewed along the x axis in the yz plane, in the winding step S100, the dimension in the longitudinal direction of the fitting portion 610 in the planar view of the yz plane is a first dimension H1, and the i-th coil In the j-th coil separation step S210 in the group shaping step S200, the dimension of the fitting portion 610 is changed to a second dimension H2 smaller than the first dimension H1 so as to narrow the fitting portion 610. It is preferable to separate the j-th coil 50 j from the fitting portion 610 (see FIG. 9).
For example, as shown in FIGS. 9 (a) and 9 (b), the dimensions are collectively changed from the first dimension H1 to the second dimension H2 for portions corresponding to all the coils belonging to the i-th coil group 5iG. You may
Thus, according to the method of manufacturing the motor accompanied by the dimensional change of the fitting portion 610, in the j-th coil separation step S210, the fitting portion 610 is smaller than the first dimension H1 maintained in the winding step S100. By changing the second dimension H2 to narrow the width, a gap can be created between the inside of the coil and the outside of the fitting portion 610. Therefore, the coil can be easily separated, and the j-th coil separation step S210 is performed in a form more suitable for mass production without breaking the shape of the coil at the time of coil separation. Can.

Second Embodiment
Hereinafter, the motor 12 according to the second embodiment will be described.
FIG. 10 is a figure shown in order to demonstrate the arrangement of the salient pole 40 and the permanent magnet 24 of the motor 12 according to the second embodiment. The boundaries between the first salient pole group 41G to the twelfth salient pole group 412G are indicated by alternate long and short dashed lines for the sake of convenience. In FIG. 10, the salient pole 40 and the permanent magnet 24 are mainly shown, and other components such as a coil are not shown.

  The motor 12 according to the second embodiment basically has the same configuration as the motor 10 according to the first embodiment, but with the motor 10 according to the first embodiment in terms of the number of salient pole groups, the number of coil groups, etc. It is different. That is, as shown in FIG. 10, the motor 12 according to the second embodiment has twelve salient pole groups (first salient pole group 41G to twelfth salient pole group 412G), and coils corresponding thereto. There are twelve groups (first coil group 51G to twelfth coil group 512G).

1. Configuration of Motor 12 According to Embodiment 2 In the motor 12 according to Embodiment 2, the number of salient poles 40 of the stator 30 is 12 n in total (n is a natural number of 4 or more). These salient poles 40 are virtually divided into 12 salient pole groups. Here, n is the number of salient poles of one salient pole group. In FIG. 10, n = 5 is displayed.
In the stator 30, a first salient pole group 41G configured by n first salient poles 41 is disposed. Subsequently, similarly to the first salient pole group 41G, the second salient pole group 42G to the twelfth salient pole group 412G, each of which is formed of n salient poles, are arranged in this order in the circumferential direction of the stator 30. Are arranged along the The first salient pole group 41G and the seventh salient pole group 47G, the second salient pole group 42G and the eighth salient pole group 48G, the third salient pole group 43G and the ninth salient pole group 49G, and the fourth salient pole group 44G The tenth salient pole group 410G, the fifth salient pole group 45G and the eleventh salient pole group 411G, and the sixth salient pole group 46G and the twelfth salient pole group 412G are 180 degrees apart from each other in mechanical angle. It is arrange | positioned so that it may be located in a position (as it becomes point-symmetrical centering | focusing on the rotation axis RA).

  A first coil group 51G consisting of n coils connected in series is mounted on the n first salient poles 41 of the first salient pole group 41G as in the case shown in FIG. 3B. There is. As for the second coil group 52G to the twelfth coil group 512G, similarly to the first coil group 51G, the n salient poles of each of the second salient pole group 42G to the twelfth salient pole group 412G are: A second coil group 52G to a twelfth coil group 512G each consisting of n coils connected in series are mounted (not shown in FIG. 10). << >>

The U-phase current is supplied to the first coil group 51G, the fourth coil group 54G, the seventh coil group 57G, and the tenth coil group 510G. The V-phase current is supplied to the second coil group 52G, the fifth coil group 55G, the eighth coil group 58G, and the eleventh coil group 511G. The W-phase current is supplied to the third coil group 53G, the sixth coil group 56G, the ninth coil group 59G, and the twelfth coil group 512G << See the display of the U-phase, the V-phase, and the W-phase in FIG. <<>>
That is, the salient pole groups forming a pair on both sides of the rotation axis RA are disposed at positions displaced by a mechanical angle of 180 ° from each other, and the in-phase current is supplied. The pair of salient pole groups are excited at the same timing across the rotation axis RA.

  In addition, the shape of the salient pole, the mounting structure of the coil, various dimensional relationships, and the like have the same configuration as the motor 10 according to the first embodiment. The motor 12 according to the second embodiment can be manufactured by the same method as the method for manufacturing the motor 10 according to the first embodiment.

2. Driving of Motor 12 According to Embodiment 2 FIG. 11 is a circuit diagram shown to explain a wire connection for driving the motor 12 according to Embodiment 2. As shown in FIG. FIG. 12 is a diagram for explaining how the motor 12 according to the second embodiment is driven. In FIG. 12, the salient pole 40 and the permanent magnet 24 are mainly shown, and the other components are not shown. In the first salient pole group 41G to the twelfth salient pole group 412G, the excited salient pole group is shaded, and the non-excited salient pole group is white.

(1) Drive Circuit The drive circuit of the motor 12 according to the second embodiment can constitute a drive circuit by so-called star connection as in the drive circuit of the motor 10 according to the first embodiment, as shown in FIG.
However, in the second embodiment, for example, in the case of the U phase, four coil groups (the first coil group 51G, the fourth coil group 54G, the seventh coil group 57G, and the tenth coil group) between the node Nu and the node Nn 510G) (connected in series in FIG. 11, but is not limited thereto). The coil group corresponding to the V phase and the W phase is also connected in the same configuration as the coil group corresponding to the U phase.

(2) Application of Rotating Magnetic Field Similar to the driving method described in the first embodiment, using the above-described driving circuit, the switches S1 to S6 are appropriately turned on / off to control the node Nu, the node Nv, and the node Nw. A rotating magnetic field is applied by passing a current between two nodes selected from among the two nodes.
As shown in FIG. 12, for example, coil groups corresponding to the U phase and V phase in the first phase (first coil group 51G, second coil group 52G, fourth coil group 54G, fifth coil group 55G, seventh coil Group 57G, an eighth coil group 58G, a tenth coil group 510G, and an eleventh coil group 511G, all of which are not shown, and a first salient pole group 41G, a second salient pole group 42G, a fourth bump The pole group 44G, the fifth salient pole group 45G, the seventh salient pole group 47G, the eighth salient pole group 48G, the tenth salient pole group 410G and the eleventh salient pole group 411G are excited << see FIG. 12 (1). <<>>
That is, in the motor 10 according to the first embodiment, roughly speaking out of 360.degree. Of one turn (in two places (the first salient pole group 41G and the second salient pole group 42G on one side and the fourth salient pole on the other side) In the motor 12 according to the second embodiment, four groups (the first salient pole group 41G and the second salient pole group 42G, the fourth salient pole are excited in the group 44G and the fifth salient pole group 45G). Excitation is performed in the group 44G and the fifth salient pole group 45G, the seventh salient pole group 47G and the eighth salient pole group 48G, and the tenth salient pole group 410G and the eleventh salient pole group 411G).
Next, in the second phase, current is supplied to the coil groups corresponding to the V phase and the W phase, and similarly, four points (the second salient pole group 42G and the third salient pole group 43G, the fifth salient pole group 45G and the fifth The sixth salient pole group 46G, the eighth salient pole group 48G and the ninth salient pole group 49G, and the eleventh salient pole group 411G and the twelfth salient pole group 412G) are excited << see FIG. 12 (2). <<>>
Similarly, after the third phase, the coil group to which current flows is shifted in the CW direction every time the phase changes, and the salient pole group to be excited is shifted in the CW direction. See FIGS. 12 (3) and 12 (4). . <<>> A rotating magnetic field is applied to the first salient pole group 41G to the twelfth salient pole group 412G in such a manner that these driving operations are repeated. The rotor 20 is rotated by the drive as described above.

3. Operation and Effect of the Motor 12 According to the Second Embodiment (1) For reference, in the motor 10 according to the first embodiment, slight vibration or noise may occur depending on the design conditions.
As described above, when driving the motor 10 according to the first embodiment, when focusing on only one drive phase, current is supplied to two coil groups roughly speaking in 360 ° of one rotation. For example, in the first phase, as shown in FIG. 6 (1), a current is supplied to the coil group corresponding to the U phase and the V phase, and one side salient pole group (first salient pole group 41G and second salient pole The group 42G) and the other side salient pole group (the fourth salient pole group 44G and the fifth salient pole group 45G) are excited at the same timing across the rotation axis RA.

At this time, due to these excitations, a force Fα acts on the vicinity of the first point P1 and the third point P3 (facing the first point P1 across the rotation axis RA) of the rotor 20, and suction is performed toward the rotation axis RA. Be done.
On the other hand, since the third salient pole group 43G and the sixth salient pole group 46G are not excited, a force such as Fα does not act near the second point P2 and the fourth point P4 of the rotor 20. That is, roughly speaking, the force Fα acts on only two places of P1 and P3 in one 360 °.
Therefore, the rotor 20 deforms slightly inward near the first point P1 and the third point P3 in the first phase, and deforms relatively outward relatively near the second point P2 and the fourth point P4. It will be done. Similarly, after the second phase, the rotor 20 is rotated while being slightly deformed at a point corresponding to the excitation point.
As such, depending on the design conditions, deformation of the rotor due to excitation causes slight vibration or noise.

(2) On the other hand, in the motor 12 according to the second embodiment, for example, in the first phase in which the current flows through the coil group corresponding to the U phase and the V phase, as described above, the first salient pole group 41G and the second protrusion The same timing is applied to the same timing when the pole group 42G, the fourth salient pole group 44G and the fifth salient pole group 45G, the seventh salient pole group 47G and the eighth salient pole group 48G, and the tenth salient pole group 410G and the eleventh salient pole group 411G Excitation is made << See Fig. 12 (1). <<>>
By these excitations, a force Fβ acts on the vicinity of the first point P1, the second point P2, the third point P3 and the fourth point P4 of the rotor 20 and is attracted toward the rotation axis RA. That is, roughly speaking, the force Fβ acts on four points P1 to P4 in one 360 °.
Therefore, in the second embodiment, since the force Fβ by which the rotor 20 is attracted toward the rotation axis RA works in a distributed manner at four points, the above-described vibration or / and noise is greater than that of the motor 10 according to the first embodiment. The motor 12 can be further reduced.
For reference, in recent years, in order to reduce the weight of the motor, the thickness of members constituting the rotor is in a decreasing direction, and the above-mentioned vibration or noise is likely to occur. Therefore, the motor 12 according to the second embodiment can be suitably introduced under such a situation.

  The motor 12 according to the second embodiment has the same configuration as the motor 10 according to the first embodiment except for the number of salient pole groups, the number of coil groups, etc. Among the effects that it has, it has the corresponding effect as it is.

Third Embodiment
Hereinafter, the motor 13 according to the third embodiment will be described.
FIG. 13 is a view for explaining the arrangement of the salient pole 40 and the permanent magnet 24 of the motor 13 according to the third embodiment. The boundaries between the first to ninth salient pole groups 41G to 49G are indicated by alternate long and short dashed lines for the sake of convenience. In FIG. 13, the salient pole 40 and the permanent magnet 24 are mainly shown, and other components such as a coil are not shown.

1. Configuration of Motor 13 According to Embodiment 3 The motor 13 according to Embodiment 3 basically has the same configuration as the motor 12 according to Embodiment 2, but the number of salient pole groups, the number of coil groups, etc. It differs from the motor 12 according to the second embodiment. That is, as shown in FIG. 13, the motor 13 according to the third embodiment has nine salient pole groups (first salient pole group 41G to ninth salient pole group 49G), and coils corresponding thereto. There are nine groups (first coil group 51G to ninth coil group 59G).
In the motor 13 shown in FIG. 13, n = 7 is displayed.

The U-phase current is supplied to the first coil group 51G, the fourth coil group 54G, and the seventh coil group 57G. The V-phase current is supplied to the second coil group 52G, the fifth coil group 55G, and the eighth coil group 58G. The W-phase current is supplied to the third coil group 53G, the sixth coil group 56G, and the ninth coil group 59G << See the display of U-phase, V-phase, and W-phase in FIG. <<>>
In the motor 13 according to the third embodiment, in-phase current is supplied to the salient pole groups disposed at positions mutually offset by a mechanical angle of 120 °.

  In addition, the shape of the salient pole, the mounting structure of the coil, various dimensional relationships, and the like have the same configuration as the motor 12 according to the second embodiment. The motor 13 according to the third embodiment can be manufactured by the same method as the method for manufacturing the motor 12 according to the second embodiment.

2. Operation and Effect of Motor 13 According to Embodiment 3 In the motor 13 according to Embodiment 3, for example, in the first phase in which the current flows through the coil group corresponding to the U phase and the V phase, as described above, the first salient pole The group 41G and the second salient pole group 42G, the fourth salient pole group 44G and the fifth salient pole group 45G, and the seventh salient pole group 47G and the eighth salient pole group 48G are excited at the same timing (not shown) ).
By these excitations, a force Fγ acts on three points (three points separated by 120 ° in mechanical angle from each other) of the rotor 20, and the force Fγ is attracted toward the rotation axis RA. That is, roughly speaking, the force Fγ acts on three places in one 360 ° of a circle (not shown).
Therefore, in the third embodiment, since the force Fγ by which the rotor 20 is attracted toward the rotation axis RA works in three places in a distributed manner, the above-described vibration or / and noise (compared to the motor 10 according to the first embodiment) The motor 13 can be further reduced in the following description).

  The motor 13 according to the third embodiment has the same configuration as the motor 12 according to the second embodiment except for the number of salient pole groups, the number of coil groups, and the like. Among the effects that it has, it has the corresponding effect as it is.

Fourth Embodiment
The motor 14 (not shown) according to the fourth embodiment basically has the same configuration as the motor 10 according to the first embodiment, the motor 12 according to the second embodiment, and the motor 13 according to the third embodiment. The motor 10 according to the first embodiment, the motor 12 according to the second embodiment, and the motor 13 according to the third embodiment are different in the method of defining the number of pole groups, the number of coil groups, and the like.

  As described above, the number of salient pole groups or / and the number of coil groups included in the motor is six in the first embodiment, twelve in the second embodiment, and nine in the third embodiment. However, the present invention is not limited to this. In the fourth embodiment, the following configuration can be generally adopted in the form including the first embodiment, the second embodiment and the third embodiment.

1. Configuration of Motor 14 According to Embodiment 4 The motor 14 according to Embodiment 4 has a rotor 20 having permanent magnets 24 in which magnetic poles of N and S poles are alternately arranged along the circumferential direction. A plurality of salient poles 40 to which the coil 50 is attached, the plurality of salient poles 40 are arranged along the circumferential direction, and the tip surface of the salient pole 40 is a surface on which the magnetic poles of the permanent magnet 24 are arranged. And a stator 30 formed to face each other.
The number of salient poles 40 possessed by the stator 30 is 3 mn (where m is a natural number of 2 or more and n is a natural number of 4 or more).
In the stator 30, a third (3k-2) salient pole group constituted by n (3k-2) salient poles, and a third (3k-1) constituted by n nth (3k-1) salient poles The salient pole group and the (3k) salient pole group configured by the n th (3k) salient poles are arranged in this order along the circumferential direction of the stator 30 (where k is Natural numbers from 1 to m.).

  In other words, “arranged in this order along the circumferential direction of the stator 30” means that each salient pole is arranged in the order in which the salient pole group numbers assigned to the respective salient pole groups increase by one. It means that the groups are disposed along the circumferential direction of the stator.

The nth (3k-2) salient poles of the (3k-2) salient pole group correspond to these salient pole groups, and an nth coil (3k) is connected in series. -2) The coil group is attached. In addition, a third (3k-1) coil group consisting of n coils connected in series is attached to the nth (3k-1) salient poles of the (3k-1) salient pole group . Furthermore, a third (3 k) coil group consisting of n coils connected in series is attached to the n third (3 k) salient poles of the (3 k) salient pole group.
When the motor 14 according to the fourth embodiment is driven, the U-phase current is supplied to the (3k-2) th coil group, and the V-phase current is supplied to the (3k-1) th coil group. The W-phase current is supplied to the (3k) th coil group.

  On the other hand, each salient pole 40 is formed in a flat shape straight along the radial direction of the stator 30.

  First salient pole group 41G to (3 m) salient pole group << The code is generally 4 (3 m) G. In each of >>, the coil 50 is attached to the salient poles 40 so that the winding directions are opposite to each other between the adjacent salient poles 40, and the coil 50 is also applicable between the adjacent salient poles 40. The distal end or proximal end of the salient pole 40 is passed by a crossover 59 which is a part of the winding 58 constituting the coil, and the crossover 59 is disposed between the adjacent slots 34 on the distal or proximal side. The relationship is reversed.

  Further, in the motor 14 according to the fourth embodiment, the distance between the adjacent salient poles 40 is preferably in the range of 2.1 times to 3.0 times the diameter of the winding 58.

  In the motor 14 according to the fourth embodiment, the diameter Φ of the stator 30 is in the range of 40 mm <Φ <200 mm, and the number of magnetic poles and / or the number of salient poles 40 of the permanent magnet 24 is 60 to 240. It is preferable to be in the range.

Furthermore, in the motor 14 according to the fourth embodiment, the permanent magnet 24 of the rotor 20 preferably has (3 mn ± m) magnetic poles. In this case, m and n are selected so that 3 mn ± m is an even number.
By the way, in the motor 14 according to the fourth embodiment, current is supplied to the coil group at m locations roughly in 360 ° of one rotation, and as a result, the salient pole groups at m locations are excited at the same timing.
In the motor 14 according to the fourth embodiment, the number of magnetic poles is (3 mn ± m), that is, for the number of salient poles of 3 mn, the number of surplus or deficient magnetic poles in the permanent magnet 24 is m. Therefore, the displacement between the salient pole and the magnetic pole of the permanent magnet is equally distributed one by one to the salient pole group at m locations to be excited, so that the force is applied in a balanced manner to one 360 ° of the rotor 20 Therefore, smoother rotation can be realized.

  Of the motor 14 according to the fourth embodiment, the components having the same configuration as the motor 10 according to the first embodiment, the motor 12 according to the second embodiment, and the motor 13 according to the third embodiment are basically implemented. The description in Embodiment 1, Embodiment 2 and Embodiment 3 is incorporated.

2. Effects of Motor 14 According to Embodiment 4 The motor 14 according to Embodiment 4 is the stator 30 in which the (3k−2) salient pole group configured by the n th (3k−2) salient poles, n The (3k-1) salient pole group constituted by the (3k-1) salient poles and the (3k) salient pole group constituted by the n (3k) salient poles are arranged in this order as a stator They are disposed along the circumferential direction of 30 (where k is a natural number from 1 to m). In addition, in order to correspond to these salient pole groups, the n third coils of (3k-2) salient pole group of the (3k-2) salient pole group are formed of n coils connected in series. (3k-2) The coil group is mounted. In addition, a third (3k-1) coil group consisting of n coils connected in series is attached to the nth (3k-1) salient poles of the (3k-1) salient pole group . Furthermore, a third (3 k) coil group consisting of n coils connected in series is attached to the n third (3 k) salient poles of the (3 k) salient pole group.
In the motor 14 having such a configuration, the force Fβ (see the description of the force Fβ in the second embodiment) with respect to m points in one 360 ° around the rotation axis RA of the rotor 30 by excitation in each drive phase ) Will work.
Therefore, in the fourth embodiment, the number of the salient pole groups and / or the number of the coil groups are increased without being limited to six, and nine, twelve, fifteen,. As a result, the force Fβ by which the rotor 20 is attracted toward the rotation axis RA can be dispersed to work at m points, so that the motor 14 can be further reduced in vibration or / and noise.

  The motor 14 according to the fourth embodiment is the motor 10 according to the first embodiment, the motor 12 according to the second embodiment, and the third embodiment in terms of how to specify the number of salient pole groups, the number of coil groups, and the like. The motor 10 according to the first embodiment, the motor 12 according to the second embodiment, and the motor 13 according to the third embodiment have the corresponding effects as they are.

Fifth Embodiment
The motor 10a according to the fifth embodiment will be described below with reference to FIGS. 14 and 15. FIG.
FIG. 14 is a view showing a positional relationship between salient poles 40 and permanent magnets 24 of the motor 10 according to the first embodiment in order to compare the motor 10 according to the first embodiment and the motor 10a according to the fifth embodiment. FIG. 15 is a view showing the arrangement of salient poles 40 of the motor 10a according to the fifth embodiment. All the figures are shown centering on the salient pole 40 and the permanent magnet 24, and the other components are not shown.

1. Arrangement of salient poles 40 and permanent magnets 24 of the motor 10 according to the fifth embodiment (for comparison)
First, as shown in FIG. 14, the motor 10 according to the first embodiment described above has 6 n salient poles (where n is a natural number of 4 or more), and the magnetic poles of the permanent magnet 24 of the rotor 20 The number is (6 n ± 2). Further, the n salient poles 40 are disposed while maintaining a pitch of 360 ° / 6n in mechanical angle.
In the motor 10 according to the first embodiment, “the number of pseudo salient poles” = the number of salient poles = 6 n.
Further, for reference, in FIG. 14, n = 4 is illustrated, the number of salient poles is 24, the number of permanent magnets has 26 poles, and the arrangement pitch of the salient poles 40 is 15 °. The least common multiple of “pseudo salient pole number (equal to 24 salient pole numbers)” and the number of magnetic poles (26) of the permanent magnet is 312.
According to the motor 10 of the first embodiment, since the number of salient poles is 6n and the number of magnetic poles of the permanent magnet is (6n ± 2), (a) “number of pseudo salient poles (the number of salient poles and Since "is equal") is even, smooth and stable rotation can be obtained without causing "problem due to biased excitation". In addition, (a) the difference between “the number of pseudo salient poles (equal to the number of salient poles)” and the number of magnetic poles of the permanent magnet is 2, which is the smallest among the even numbers; The number (equal to the number of salient poles) and the least common multiple of the number of magnetic poles of the permanent magnet can be increased, and so-called pulsation of cogging torque can be suppressed.

2. Configuration of Motor 10a According to Embodiment 5 The motor 10a according to Embodiment 5 basically has the same configuration as that of the motor 10 in Embodiment 1, but the number of salient poles, the "number of pseudo salient poles" and the permanent The motor 10 according to the first embodiment is different from the motor 10 according to the first embodiment in the relationship between the number of magnetic poles of the magnet and the arrangement rule of the salient poles.
That is, as shown in FIG. 15, the motor 10a according to the fifth embodiment has 6n salient poles, and is excited by the in-phase current in each of the first salient pole group 41G to the sixth salient pole group 46G. The number of salient poles 40 belonging to the same salient pole group is calculated based on the “number of pseudo salient poles” which is a number (i) or a number (ii) smaller than the actual number 6 n of salient poles. It is disposed while maintaining the equal pitch θ1. Then, among the n salient poles belonging to the salient pole group, the A salient pole located at the end of the salient pole group and the n salient poles among the n salient poles belonging to another salient pole group adjacent to the salient pole group The B salient pole located at the end of the other salient pole group and adjacent to the A salient pole is an increase in the case of a pitch θ 2 << (i) wider than the pitch calculated based on the “number of pseudo salient poles”. The pitch is divided by 6 to make it wider. Or, in the case of a narrow pitch θ 2 << (ii), it is narrower by the amount obtained by dividing the reduced pitch by six. It is arranged while keeping ">>" mutually.

  Here, the “pseudo salient pole number” is preferably a number larger than the actual number 6 n of salient poles. When a relatively large number of salient poles are provided to a motor having a diameter of a predetermined size, since the slot is originally extremely narrow, the "number of pseudo salient poles" is made larger than the actual number of salient poles 6n as described above. This is because if the pitch θ2 between the pole and the B salient pole becomes wider, the degree of difficulty of coil attachment also decreases.

  Furthermore, as shown in FIG. 15, the motor 10a according to the fifth embodiment has 6 n salient poles, and the permanent magnet 24 of the rotor 20 has (6 n + 2) magnetic poles, and the first salient pole In each of the groups 41G to the sixth salient pole group 46G, the n salient poles 40 belonging to the salient pole group are disposed while maintaining a mechanical angle of θ1 = 360 ° / (6n + 1), Among the n salient poles belonging to the salient pole group, the A salient pole located at the end of the salient pole group, and the other one of the n salient poles belonging to another salient pole group adjacent to the salient pole group And the B salient pole located at the end of the salient pole group and adjacent to the A salient pole, while maintaining the mechanical angle θ2 = {360 ° / (6n + 1)} + 360 ° / (6n + 1) / 6 pitch mutually It is preferable that it is arrange | positioned.

Hereinafter, specific description will be continued using FIG. 15 as an example.
In the motor 10a according to the fifth embodiment shown in FIG. 15, n = 4, the number of salient poles is 24, and the number of magnetic poles of the permanent magnet is 26. Then, for example, when the salient poles 40 disposed in the first salient pole group 41G are viewed locally, the “number of pseudo salient poles” is (6n + 1), that is, 25. At this time, the disposition pitch of the salient poles 40 in the first salient pole group 41G is θ1 = 360 ° / (6n + 1), that is, 14.4 °. Among the four salient poles belonging to the first salient pole group 41G, the A salient pole located at the end of the first salient pole group 41G and another salient pole group adjacent to the first salient pole group 41G Among the four salient poles belonging to the two salient pole group 42G), the B salient pole located at the end of the second salient pole group 42G and adjacent to the A salient pole is θ2 = {360 ° / (6n + 1)} + 360 ° It will be arrange | positioned, mutually maintaining the pitch of / (6n + 1) / 6, ie, 16.8 degrees.
Note that the least common multiple based on the “pseudo salient pole number (25)” and the number of magnetic poles (26) of the permanent magnet is 650.
Also in each of the second salient pole group 42G to the sixth salient pole group 46G, the salient poles 40 are disposed according to the same rule as described above.

3. Operation and effect of motor 10a according to embodiment 5 (1) As described above, in motor 10a according to embodiment 5, (c) the number of magnetic poles of the permanent magnet is 6n + 2, and belongs to the same salient pole group Since the salient poles are arranged at a mechanical angle while maintaining a pitch of 360 ° / (6n + 1), the number of “pseudo salient poles” is (6n + 1) when the same salient pole group is viewed locally. The difference between “the number of pseudo salient poles” and the number of magnetic poles of the permanent magnet is 1 which is the smallest. Therefore, the least common multiple of the “pseudo salient pole number” and the number of magnetic poles included in the permanent magnet can be made larger than the least common multiple of the motor 10 according to the first embodiment, and the pulsation of cogging torque can be further suppressed. .

For example, the motor 10 which concerns on Embodiment 1 shown in FIG. 14 and the motor 10a which concerns on Embodiment 5 shown in FIG.
As shown in FIGS. 14, 15 and the above table, even if they have substantially the same size, the motor 10 a according to the fifth embodiment is much larger than the motor 10 according to the first embodiment. The least common multiple can be obtained, and the pulsation of the cogging torque can be further suppressed. Furthermore, by suppressing the pulsation of the cogging torque, not only the vibration can be suppressed, but also the energy loss can be suppressed and the torque at the time of starting can be further increased. In addition, smooth and stable rotation can be obtained.

(2) In the motor 10a according to the fifth embodiment, (d) an A salient pole positioned at an end of the salient pole group among n salient poles belonging to the salient pole group and an adjacency to the salient pole group Among the n salient poles belonging to another salient pole group, the B salient pole located at the end of another salient pole group and adjacent to the A salient pole has a mechanical angle of {360 ° / (6n + 1)} + 360 ° It arranges keeping the pitch of / (6n + 1) / 6 mutually. By this configuration, the pair of salient pole groups (as a result, salient poles belonging to those salient pole groups) are exactly 180 ° apart from each other while eliminating the empty pitch for one salient pole. It is possible to obtain a motor that can be smoothly and stably rotated, which can be disposed at a different position, suppressing the "problem due to biased excitation".
By the way, if (6n + 1) division is carried out for 360 ° all circumference and 6n salient poles are arranged at those division positions, a division space in which the salient poles are not arranged actually becomes vacant for one salient pole. In addition, since the division is performed in an odd number, the pair of salient pole groups (as a result, the salient poles belonging to those salient pole groups) are not disposed at positions which are exactly 180 degrees apart from each other. Therefore, more or less "problems due to biased excitation" remain in this case.

  In the motor 10a according to the fifth embodiment, the relationship between the number of salient poles, the number of pseudo salient poles serving as the calculation basis for determining the disposition pitch of the salient poles, and the number of magnetic poles of the permanent magnet, and the disposition of the salient poles. The configuration other than the rule is the same as that of the motor 10 according to the first embodiment, and therefore, the corresponding effects of the effects of the motor 10 according to the first embodiment can be obtained as they are.

Sixth Embodiment
The motor 10b according to the sixth embodiment will be described below.

The motor 10b according to the sixth embodiment (not shown. Hereinafter, all constituent elements of the motor 10b according to the sixth embodiment are not shown.) Is basically the same as the motor 10 according to the first embodiment. The motor 10 is different from the motor 10 according to the first embodiment in the relationship between the number of salient poles and the number of magnetic poles of the permanent magnet. That is, the motor 10b according to the sixth embodiment has the number of salient poles of 6n, and the permanent magnet 24 of the rotor 20 has the number of magnetic poles of (6n ± 4).
According to the motor 10b of the sixth embodiment, since the number of salient poles is an even number, smooth and stable rotation can be obtained without causing “problem due to biased excitation”. Further, (a) the difference between the number of salient poles and the number of magnetic poles of the permanent magnet is 4, and the least common multiple of the number of salient poles and the number of magnetic poles of the permanent magnet can be made relatively large. Can be suppressed.

  The motor 10b according to the sixth embodiment has the same configuration as the motor 10 according to the first embodiment except for the relationship between the number of salient poles and the number of magnetic poles of the permanent magnet. Of the effects that the has, it has the corresponding effect as it is.

  As mentioned above, although the present invention was explained based on the above-mentioned embodiment, the present invention is not limited to the above-mentioned embodiment. It is possible to implement in the range which does not deviate from the meaning, for example, the following modifications are also possible.

(1) The number, the material, the shape, the position, the size, and the like of the constituent elements described in the above embodiment are exemplifications, and can be changed as long as the effects of the present invention are not impaired.

(2) In each embodiment, the so-called outer rotor type in which the stator 30 is the side closer to the rotation axis RA (the side in the −r direction) and the rotor 20 is the side farther from the rotation axis RA (the side in the r direction) Although described using a motor, the present invention is not limited to this. The present invention may be applied to a so-called inner-rotor type motor in which the rotor 20 is the side closer to the rotation axis RA (the side in the −r direction) and the stator 30 is the side farther from the rotation axis RA (the side in the r direction).

(3) In the method of manufacturing the motor 10 according to the first embodiment, the coils are collectively formed in series in the winding step S100, and the coils are easily fitted into the salient poles in the i-th coil group shaping step S200. After shaping, in the coil fitting step S300, a series of pre-shaped coils are collectively fitted and the coil is attached to the salient pole, but this is not a limitation. For example, the motor 10 according to the present invention can also be obtained by a method of mounting the coil 50 by winding the winding 58 directly on the salient pole 40 while pushing the winding 58 into the bottom of the slot SL.

(4) Although the method for manufacturing the motor 10 according to the first embodiment has been described as the method for manufacturing a motor in the above-described [Embodiments for Carrying Out the Invention], the present invention is limited to the motor 10 according to the first embodiment. It is not a thing. The manufacturing method can also be applied to the motor 10a according to the fifth embodiment, the motor 10b according to the sixth embodiment, and the motor according to the modification.

(5) Although the motor obtained by each embodiment was explained as what is used for direct drive, it is not limited to this. For example, it may be used as a motor which does not perform direct drive by interposing a reduction gear.

(6) In the motor 10 according to the first embodiment, as shown in FIG. 5, the first coil group 51G and the fourth coil group 54G are connected in series, and the second coil group 52G and the fifth coil group 55G Are connected in series, and the third coil group 53G and the sixth coil group 56G are connected in series, but it is not limited to this. For example, these coil groups may be connected in parallel.
In addition, as a circuit for driving the motor 10 according to the first embodiment, as shown in FIG. 5, the first coil group 51G to the sixth coil group 56G are configured as a circuit in which so-called star connection is performed. It is not a thing. For example, a circuit employing another connection method such as delta connection may be used.

10, 10a, 10b, 900: Motor, 20, 920: Rotor, 22: Rotor body, 24, 924: Permanent magnet, 26: Bearing, 30, 930: Stator, 32: Stator base, 40, 940: Salient pole, 41 ... 1st salient pole, 41G, 941G ... 1st salient pole group,
42 ... 2nd salient pole, 42G, 942G ... 2nd salient pole group, 43 ... 3rd salient pole, 43G, 943G ... 3rd salient pole group, 44 ... 4th salient pole, 44G, 944G ... 4th salient pole group 45 fifth salient pole 45 G 945 G fifth salient pole group 46 sixth salient pole 46 G 946 G sixth salient pole group 47 G seventh salient pole group 48 G eighth salient pole group 49G: ninth salient pole group, 410G: tenth salient pole group, 411G: eleventh salient pole group, 412G: twelfth salient pole group, 50, 511, 512, 513, 514, 950: coil, 51G, 951G ... 1st coil group, 52G, 952G ... 2nd coil group, 53G, 953G ... 3rd coil group, 54G, 954G ... 4th coil group, 55G, 955G ... 5th coil group, 56G, 956G ... 6th coil group , 57 G: seventh coil group, 58 G: eighth coil group, 59 G: ninth co Coil group 510 G coil group 51 G coil group 12 coil group 58 coil winding 59 59 crossover wire 59 j crossover wire 60 power lead wire 70 signal Lead wire, 600: coil manufacturing jig, 610: fitting portion, AG: air gap, E: power source, Nn, Nu, Nv, Nw: node, RA: rotation axis, S1, S2, S3, S4, S5, S6: switch, SL: slot, WS1: first rotation direction

Claims (12)

A rotor having permanent magnets in which magnetic poles of N and S poles are alternately arranged along a circumferential direction, and a plurality of salient poles on which a coil is attached to each, the plurality of salient poles being circular A stator arranged along a circumferential direction, and a tip surface of the salient pole being formed to face a surface on which the magnetic poles of the permanent magnet are arranged,
The number of the salient poles of the stator is 6n (n is a natural number of 4 or more),
In the stator, a first salient pole group composed of n first salient poles, a second salient pole group composed of n second salient poles, and a third composed of n third salient poles Three salient pole groups, a fourth salient pole group configured by n fourth salient poles, a fifth salient pole group configured by n fifth salient poles, and n sixth salient poles Are arranged in this order along the circumferential direction of the stator, and the first and fourth salient pole groups, the second salient pole group and the fifth The pole group, the third salient pole group and the sixth salient pole group are disposed so as to be displaced by 180 degrees with respect to each other at a mechanical angle, respectively.
A first coil group consisting of n coils connected in series is mounted on the n first salient poles of the first salient pole group, and n n of the second salient pole groups are mounted. A second coil group consisting of n coils connected in series is mounted on the second salient pole, and n n third salient poles of the third salient pole group are connected in series. A third coil group consisting of n connected coils is mounted, and the n fourth salient poles of the fourth salient pole group are made up of n number of coils connected in series A fourth coil group is mounted, and a fifth coil group consisting of n number of coils connected in series is mounted on the n fifth salient poles of the fifth salient pole group, A sixth coil group consisting of n coils connected in series is mounted on the n sixth salient poles of the sixth salient pole group,
A U-phase current is supplied to the first coil group and the fourth coil group, a V-phase current is supplied to the second coil group and the fifth coil group, and the third coil group and A W-phase current is supplied to the sixth coil group,
Each of the salient poles is formed in a flat straight shape along the radial direction of the stator,
In each of the first salient pole group to the sixth salient pole group,
The coil is attached to the salient poles such that winding directions are opposite to each other between the adjacent salient poles,
The coil is passed between the adjacent salient poles at the distal end side or the proximal end side of the salient poles by a crossover which is a part of a winding constituting the coil, and the crossover is an adjacent slot. A motor characterized in that the relationship between the distal end side or the proximal end side is reversed between the two. In the motor according to claim 1,
A motor characterized in that a distance between the adjacent salient poles is in a range of 2.1 times to 3.0 times a diameter of the winding. The motor according to claim 1 or 2
The motor is characterized in that the diameter Φ of the stator is in the range of 40 mm <Φ <200 mm, and the number of magnetic poles possessed by the permanent magnet and / or the number of salient poles is in the range of 60 to 240. In the motor according to any one of claims 1 to 3,
The number of magnetic poles that the permanent magnet of the rotor has is (6n ± 2). In the motor according to any one of claims 1 to 3,
The permanent magnet of the rotor has (6n + 2) magnetic poles.
In each of the first salient pole group to the sixth salient pole group,
The n salient poles belonging to the salient pole group are disposed while maintaining a mechanical angle of 360 ° / (6n + 1),
Among the n salient poles belonging to the salient pole group, the A salient pole located at the end of the salient pole group and the n salient poles among the n salient poles belonging to another salient pole group adjacent to the salient pole group The B salient pole located at the end of another salient pole group and adjacent to the A salient pole is arranged while maintaining a mechanical angle of {360 ° / (6 n + 1)} + 360 ° / (6 n + 1) / 6 pitch mutually. A motor characterized in that it is provided. A rotor having permanent magnets in which magnetic poles of N and S poles are alternately arranged along a circumferential direction, and a plurality of salient poles on which a coil is attached to each, the plurality of salient poles being circular A stator arranged along a circumferential direction, and a tip surface of the salient pole being formed to face a surface on which the magnetic poles of the permanent magnet are arranged,
The number of the salient poles of the stator is 3 mn (where m is a natural number of 2 or more, n is a natural number of 4 or more),
In the stator, a third (3k-2) salient pole group constituted by n (3k-2) salient poles, and a third (3k-1) constituted by n nth (3k-1) salient poles A salient pole group and a (3k) salient pole group constituted by n number (3 k) salient poles are arranged in this order along the circumferential direction of the stator (where k is 1 to 6). a natural number up to m)),
A third (3k-2) coil group consisting of n number of coils connected in series is attached to the nth (3k-2) salient poles of the (3k-2) salient pole group A third (3k-1) coil group consisting of n coils connected in series is attached to the n third (3k-1) salient poles of the (3k-1) salient pole group A third (3k) coil group consisting of n number of coils connected in series is mounted on the n third (3k) salient poles of the (3k) salient pole group,
A U-phase current is supplied to the third (3k-2) coil group, a V-phase current is supplied to the third (3k-1) coil group, and W is applied to the (3k) coil group. Phase current is supplied,
Each of the salient poles is formed in a flat straight shape along the radial direction of the stator,
In each of the first salient pole group to the (3 m) salient pole group,
The coil is attached to the salient poles such that winding directions are opposite to each other between the adjacent salient poles,
The coil is passed between the adjacent salient poles at the distal end side or the proximal end side of the salient poles by a crossover which is a part of a winding constituting the coil, and the crossover is an adjacent slot. A motor characterized in that the relationship between the distal end side or the proximal end side is reversed between the two. In the motor according to claim 6,
A motor characterized in that a distance between the adjacent salient poles is in a range of 2.1 times to 3.0 times a diameter of the winding. In the motor according to claim 6 or 7,
The motor is characterized in that the diameter Φ of the stator is in the range of 40 mm <Φ <200 mm, and the number of magnetic poles possessed by the permanent magnet and / or the number of salient poles is in the range of 60 to 240. The motor according to any one of claims 6 to 8
The number of magnetic poles possessed by the permanent magnet of the rotor is (3 mn ± m) (however, m and n are selected such that 3 mn ± m is an even number).   The motor according to any one of claims 1 to 9, wherein the motor is used for direct drive. A method of manufacturing a motor according to any one of claims 1 to 10, wherein
When an axis parallel to the longitudinal direction of a rod-like coil manufacturing jig is defined as x axis, an axis perpendicular to x axis is defined as y axis, and an axis perpendicular to x axis and y axis is defined as z axis ,
When the yz plane is viewed in a plan view along the x axis, the winding is wound t times to form a jth coil so as to turn in the first rotation direction with respect to the coil manufacturing jig. Coil formation step (j is any natural number from 1 to n-2), passing between the jth coil and the (j + 1) th coil such that the winding is turned a half turn in the first rotation direction A j-th crossover wire forming step for forming a j-th crossover wire which becomes a part, the winding being wound t turns so as to turn in the first rotation direction with respect to the coil manufacturing jig, and a (j + 1) th coil Forming an (j + 1) th coil for forming a second coil, and a second (j + 1) th coil passing between the (j + 1) th coil and the (j + 2) th coil by half winding the winding in the first rotation direction j + 1) have a (j + 1) th crossover forming step for forming a crossover, and A wire winding step of winding said winding relative to said coil fabrication jig so as to form a plurality coils,
A coil separation step of separating at least the j-th coil from the coil fabrication jig; and at least one of the j-th crossover wires so that the inner diameter of the j-th coil and the inner diameter of the (j + 1) -th coil can be seen from the same direction. A part or all of the i-th coil group (where i is a natural number from 1 to 3 m, m is a natural number of 2 or more) including at least a jth crossover bending step for bending a part and including a plurality of coils Coil group shaping step of shaping as;
A coil fitting step of fitting each coil belonging to the ith coil group to the corresponding ith salient pole among the ith salient pole group in the stator;
A method of manufacturing a motor comprising: In the method of manufacturing a motor according to claim 11,
The coil manufacturing jig includes a fitting portion disposed inside the formed coil,
When viewing the yz plane in plan view along the x-axis, in the winding step, the dimension in the longitudinal direction of the fitting portion is set to a first dimension,
In the jth coil separation step in the ith coil group shaping step, the dimension of the fitting portion is changed to a second dimension smaller than the first dimension to separate the jth coil from the fitting portion Method of manufacturing a motor characterized in that.