JP2000278931A - Linear motor - Google Patents

Abstract

(57) [Problem] To provide a linear motor capable of suppressing generation of cogging thrust, reducing the length of an armature, and improving the coil temperature detection accuracy. An armature includes a plurality of armature blocks (4, 5).
6 and arranged in the direction of thrust, and the block core 9 of each armature block is provided with teeth 10 of an integral multiple of the number of phases arranged at an equal pitch, and the armature coil 11 wound in a concentrated manner there. A gap corresponding to an integral multiple of the value obtained by dividing the magnetic pole pitch by the number of armature blocks is provided between the armature blocks, and the armature coils of each armature block are separated from each other by a gap between the armature blocks. By shifting the phase by an electric angle corresponding to the above, the Kogin thrust generated in each armature block is provided with a phase difference and is canceled out, and the sum is made zero.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a linear motor used for an actuator such as a table feed of a machine tool or a transfer device.

[0002]

2. Description of the Related Art In a conventional moving coil type linear motor, as shown in FIG. 30, a field permanent magnet 41 provided on a fixed portion and a comb-tooth-shaped An armature core 42 is provided, a plurality of teeth 44 are provided on the armature core 42, and an armature coil 43 wound in a distributed manner is wound thereon. The armature core 42 on which the armature coil 43 is wound has the number of phases n, the number of field permanent magnets 41 p, and the number of opposing teeth 44 per pole q, the armature core 42 The number N of the teeth 44 provided in the
= N × p × q, and this number of teeth is equal to 3/3 of the armature coil 43 on the armature core 42 provided at equal intervals in the thrust direction X.
The phase windings U, V, and W are provided by coil jumps having at least two teeth pitches.

[0003]

For this reason, in the conventional moving coil type linear motor, the magnetic circuit of the moving armature core is not endless and is open at both ends. Unlike the central slot, the slots at both ends accommodate only one coil, and this slot generates an end effect to generate one cycle of cogging torque TC in the magnetic pole pitch of the field magnet. , And thrust unevenness was generated. In addition, when inserting a temperature sensor into the slot that houses the coil to control the temperature of the coil, the slot must be enlarged, and the armature core becomes large, which reduces the space factor of the winding. There is. For this reason, in the linear motor, the temperature sensors are provided at both ends of the coil. However, since the temperature measurement at the center of the coil cannot be performed, highly accurate temperature detection cannot be obtained. Therefore, an object of the present invention is to provide a linear motor capable of suppressing generation of cogging thrust, shortening the length of the armature in the thrust direction, and improving the coil temperature detection accuracy.

[0004]

In order to achieve the above object, according to the first aspect of the present invention, there are provided field poles arranged at an equal pitch, and an armature facing the field poles,
The armature is divided into a plurality of armature blocks and arranged in the direction of thrust, and the block core of each armature block is wound around the teeth with an integral multiple of the number of phases arranged at an equal pitch and the teeth. Armature coil is provided,
Between the armature blocks, a gap corresponding to an electrical angle that is an integral multiple of a value obtained by dividing the magnetic pole pitch by the number of the armature blocks is provided, and the armature coils of each armature block are separated from each other. It features a linear motor that is wound out of phase with an electrical angle corresponding to the gap. According to the second aspect of the present invention, the number of armature blocks is set to an integral multiple of three, and the distance between each armature block is 2/3 of the magnetic pole pitch.
Are provided in the block core of each armature block at 3 × a (a = integer) teeth at an equal pitch, and the number of field poles per armature block is 2 × a (a =
(Integer) and arranged at equal pitches, and armature coils are wound around all of the teeth of the block core of the first armature block in the order of the U-phase coil, the V-phase coil, and the W-phase coil to form the second armature block. An armature coil is wound around all the teeth of the block core in the order of a V-phase coil, a W-phase coil, and a U-phase coil, and the W-phase coil and the U-phase coil are wound on all of the block core teeth of the third armature block. , The armature coils are wound in the order of the V-phase coils, and when the number of the armature blocks exceeds 3, the above coil arrangement is repeated, and each phase coil of each armature block is three-phase balanced. I have. According to the third aspect of the present invention, the number of armature blocks is set to an integral multiple of three, and a gap having a dimension of 1/3 of the magnetic pole pitch is provided between each armature block.
3 × a (a = integer) teeth are provided at equal pitches on the block core of each armature block, and the number of field poles per armature block is 2 × a (a = integer) and arranged at equal pitches. The armature coil is wound in the order of the U-phase coil, the V-phase coil, and the W-phase coil around all the teeth of the block core of the first armature block, and all of the teeth of the block core of the second armature block are wound around the teeth. W-phase coil, U-phase coil, V
The armature coils are wound in the order of the phase coils, and the armature coils are wound in the order of the V-phase coil, the W-phase coil, and the U-phase coil in all of the teeth of the block core of the third armature block. Is greater than 3, the above-described coil arrangement is repeated, and the phase coils of each armature block are three-phase balanced. Also,
According to the fourth aspect of the present invention, three armature blocks are used, the length of each armature block in the thrust direction is set to 10 times the field pole pitch, and 9 mm is added to the block core of each armature block. The teeth are arranged at equal pitches, and a gap having a size of 2/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. The teeth of the block core of each armature block are grouped into groups of three. The armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the tooth group of the block core of the first armature block,
The armature coils are wound in the order of the V-phase coil, the U-phase coil, and the W-phase coil in the tooth group of the block core of the second armature block, and the W-phase coil is inserted into the tooth group of the block core of the third armature block. V-phase coil, U
It is characterized in that the armature coils are wound in the order of the phase coils, and the armature coils are arranged with a phase difference of 120 ° and are connected in a three-phase balanced manner. According to the invention of claim 5, three armature blocks are used, and the length of each armature block in the thrust direction is set to ten times the field pole pitch.
Nine teeth are provided at equal pitches on the block core of each armature block, and a gap having a dimension of 1/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. Are grouped into groups of three, and the armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the tooth group of the block core of the first armature block, and The armature coils are wound in the tooth group of the block core in the order of the W-phase coil, the V-phase coil, and the U-phase coil in the order of the first armature block, and the block core of the third armature block is wound. V-phase coil, U-phase coil, W-phase coil in the same direction as the first armature block
It is characterized in that the armature coils are wound in the order of the phase coils, the armature coils are arranged with a phase difference of 60 °, and three-phase balanced connections are made. According to the invention described in claim 6,
Using two armature blocks, the length of each armature block in the thrust direction is set to be 10 times the field pole pitch, and nine teeth are provided at equal pitches on the block core of each armature block. A gap having a dimension of の of the pitch is provided between the armature blocks and arranged in the thrust direction, and the teeth of the block core of each armature block are grouped into groups of three, and the block core of the first armature block is formed. Armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the order of the tooth group, and the first and second teeth of the tooth group of the block core of the second armature block are respectively W-phase coils. , Third, fourth, and fifth teeth, respectively, a U-phase coil for the sixth, seventh, and eighth teeth, and a W-phase coil for the ninth tooth. coil Winding, the armature coils 90 °
And three-phase balanced connection. According to the invention of claim 7, two armature blocks are used, and the length of each armature block in the thrust direction is set to 10 times the field pole pitch, and the block core of each armature block is used. 9 teeth are provided at an equal pitch, and a gap having a half size of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. The teeth of the block core of each armature block are three by three. Group 1
The armature coil is wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the tooth group of the block core of the armature block, and the V-phase coil and the U-phase coil are wound in the tooth group of the block core of the second armature block. An armature coil is wound in the order of a coil and a W-phase coil, and the armature coils are arranged with a phase difference of 90 ° to perform three-phase balanced connection. According to the eighth aspect of the present invention, 2 ×
Using c (c = integer) armature blocks, the length in the thrust direction of each armature block is set to 10 times the field pole pitch, and 12 teeth are provided on the block core of each armature block. Provided at a pitch, and a gap of a half of the magnetic pole pitch is provided between each armature block and arranged in the thrust direction,
The group of teeth of the block core of each armature block is grouped into three groups, and the tooth group of the block core of the first armature block includes a forward winding U-phase coil, a forward winding V-phase coil, and a reverse winding u-phase coil. , The armature coils are wound in the order of the reverse-wound v-phase coil, and the forward-wound V-phase coil, the reverse-wound u-phase coil, the reverse-wound v-phase coil, The armature coils are wound in the order of the forward winding U-phase coils, and when the number of armature blocks exceeds 2, the above operation is repeated to form the two-phase connection by winding the armature coils. According to the ninth aspect of the present invention, 2 × d (d = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to one of the field pole pitch.
The length is 0 times, and 1 is added to the block core of each armature block.
Providing two teeth at equal pitch, 1/2 of magnetic pole pitch
Are provided between the armature blocks and arranged in the thrust direction, the teeth of the block core of each armature block are grouped into two groups, and the teeth of the block core of the first armature block are positively aligned. Directional winding U-phase coil,
Reverse winding v-phase coil, forward winding W-phase coil, reverse winding u-phase coil, forward winding V-phase coil, reverse winding w
The armature coils are wound in the order of the phase coils, and the forward winding V-phase coil, the forward winding W-phase coil, and the reverse winding u are wound around the tooth group of the block core of the second armature block.
If the armature coils are wound in the order of phase coil, forward winding V-phase coil, reverse winding w-phase coil, forward winding U-phase coil, reverse winding v-phase coil, and the number of armature blocks exceeds 2, Is repeated to form a three-phase connection by winding an armature coil. Claim 1
According to the invention described in No. 0, 3 × e (e = integer) armature blocks are used, and the length in the thrust direction of each armature block is set to 10 times the field pole pitch, and each armature block is used. 12 teeth are provided at equal pitch on the block core of
A gap having a size of ／ of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction, and the teeth of the block core of each armature block are grouped into groups of three. An armature coil is wound around the teeth group of the core in the order of a forward winding U-phase coil, a forward winding V-phase coil, a reverse winding u-phase coil, a reverse winding v-phase coil, and a block core of a second armature block. The armature coil is wound in the order of the reverse winding u-phase coil, the reverse winding v-phase coil, the forward winding U-phase coil, the reverse winding v-phase coil, and the reverse winding u-phase coil in the tooth group of A reverse winding v-phase coil, a forward winding U-phase coil, a reverse winding v-phase coil, a forward winding U-phase coil,
An armature coil is wound in the order of the forward winding V-phase coil, and when the number of armature blocks exceeds 3, the above is repeated to form a two-phase connection by winding the armature coil. According to the eleventh aspect of the present invention, 3
× f (f = integer) armature blocks are used, the length in the thrust direction of each armature block is set to 10 times the field pole pitch, and 12 teeth are provided on the block core of each armature block. Provided at an equal pitch, a gap having a size of 2/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction, and the teeth of the block cores of each armature block are grouped in groups of two. A forward-winding U-phase coil, a reverse-winding v-phase coil, a forward-winding W-phase coil, a reverse-winding u-phase coil, a forward-winding V-phase coil, a reverse-winding w-phase The armature coils are wound in the order of the coils, and forward-wound V-phase coils, reverse-wound w-phase coils, forward-wound U-phase coils, and reverse-wound v are wound around the teeth groups of the block core of the second armature block. Coils, forward winding W-phase coils,
The armature coils are wound in the order of the reverse-winding u-phase coils, and the forward-winding W-phase coil, the reverse-winding u-phase coil, the forward-winding V-phase coil, and the reverse are wound around the tooth group of the block core of the third armature block. The armature coils are wound in the order of the direction-wound w-phase coil, the forward-wound U-phase coil, and the reverse-wound v-phase coil. If the number of the armature blocks exceeds 3, repeat the above to wind the armature coils and three-phase connection. It is characterized by having. According to the twelfth aspect of the present invention, 3 × g (g = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to ten times the field pole pitch. Twelve teeth are provided at equal pitches on the block core of each armature block, and a gap having a size of 1/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction. Are grouped into groups of three, and the tooth group of the block core of the first armature block includes a positively wound U-phase coil, a positively wound V-phase coil, a reversely wound u-phase coil, and a reversely wound v-phase coil. Armature coils are wound in this order, and a forward winding V-phase coil, a forward winding U-phase coil, a forward winding V-phase coil, and a reverse winding u-phase coil are wound around the tooth group of the block core of the second armature block. ,
The armature coils are wound in the order of the reverse-winding v-phase coil, and the reverse-winding u-phase coil, the reverse-winding v-phase coil, the forward-winding U-phase coil, the positive winding are wound around the tooth group of the block core of the third armature block. The armature coil is wound in the order of the direction winding V phase coil and the reverse winding u phase coil,
When the number of armature blocks exceeds 3, the above operation is repeated to form a two-phase connection by winding armature coils. According to the thirteenth aspect, 3 × h
Using (h = integer) armature blocks, the length of each armature block in the thrust direction is set to 10 times the field pole pitch, and 12 teeth are equi-pitched on the block core of each armature block. And a gap having a dimension of 1/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction, and the teeth of the block core of each armature block are grouped in groups of two. The tooth group of the block core of the block includes a forward winding U-phase coil, a reverse winding v-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, and a reverse winding W-phase coil. The armature coils are wound in this order, and the reverse winding w-phase coil, the forward winding U-phase coil, the reverse winding v-phase coil,
The armature coil is wound in the order of a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, and
Armature block of the core group of teeth wound forward winding V-phase coil, reverse winding w-phase coil, forward winding U-phase coil, reverse winding v-phase coil, forward winding W
An armature coil is wound in the order of a phase coil and a reversely wound u-phase coil, and when the number of armature blocks exceeds 3, the above operation is repeated to form a three-phase connection by winding the armature coil. According to the fourteenth aspect, the block core constituting the armature block includes:
A core segment including a yoke portion having an engagement portion formed on the opposite side to the engagement protrusion formed to fit into the engagement protrusion, and teeth for winding each armature coil; The field magnetic poles are arranged so as to sandwich the longitudinal direction of the block core row formed by sequentially connecting the core segments from both sides. According to the invention described in claim 15, the block core constituting the armature block includes a plurality of T-shaped core segments each having a lower end portion forming a teeth portion and an upper end portion forming a yoke portion. It is characterized by having a block core interconnected by a yoke section. According to the invention of claim 16, in the gap between the armature blocks, the space between the yoke portions of the block cores is supported by a magnetic spacer, and the temperature sensor is molded and supported in the space above the spacer. It is characterized by:

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A linear motor has a field pole and an armature facing the field pole, one of which is used as a stator and the other as a mover. According to the present invention, in order to suppress the cogging thrust generated in the linear motor, the armature is divided into a plurality of pieces, a phase difference is provided between the divided armature blocks, and the generated cogging thrust is applied between the armature blocks. Offset. For this reason, the armature coils are concentratedly wound, and a gap corresponding to an electrical angle that is an integral multiple of the value obtained by dividing the magnetic pole pitch by the number of armature blocks is provided between the armature blocks. Are shifted in phase by an electrical angle corresponding to the gap.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 shows a first embodiment,
The case where the number of armature blocks is 3, the number of teeth per armature block is 9, and the number of field poles per armature block is 6 is shown. The field pole 1 is made of a permanent magnet, and the stator 2
It is provided at equal pitch on the side. An armature 3 forming a mover is provided on the stator 2. Armature 3
Are the first armature block 4 and the second armature block 5
And a third armature block 6, with a spacing piece 7 provided between the armature blocks to maintain a gap. The gap size in this case is ２ of the magnetic pole pitch Pm. The armature blocks 4, 5, 6 and the spacing pieces 7 are arranged in the thrust direction and are integrally held by fixing means 8. The block teeth 9 of the armature blocks 4, 5, and 6 have nine teeth 1 arranged at the same tooth pitch Pt.
0 is provided. A concentrated winding armature coil 11 is wound around each tooth 10. The field pole 1 may be of a permanent magnet type or a winding excitation type.
Are arranged at an equal pitch Pm over the entire length of the stator 2 having a length obtained by adding a linear motor stroke to the entire length in the thrust direction. Since the magnetic pole pitch Pm is an electrical angle of 180 °,
The gap size Pm × 2/3 is 120 ° in electrical angle. Therefore, the tooth pitch Pt is set to an electrical angle of 120 °. Therefore, the armature coil arrangement of each armature block 4, 5, 6 is as shown in FIG. That is, in the first armature block 4, the armature coil 11 is wound in the order of the U-phase coil, the V-phase coil, and the W-phase coil, and in the second armature block 5, the V-phase coil, the W-phase coil, and the U-phase coil. The coils are wound in the order of the phase coils.
The armature coil 11 is wound in the order of the U-phase coil and the V-phase coil.
When the number of blocks becomes 9 blocks, 12 blocks, or the like, the above arrangement is repeated, and the coils of each phase are three-phase balanced. When the armature coil 11 is provided in this way, the coil arrangement of the armature 3 in the thrust direction is as shown in FIG. 2B, and the electrical angle 12 is next to the last coil W phase of the first armature block 4.
Since the 0 ° interval piece 7 is present and occupies the U-phase portion, the winding start of the armature coil 11 of the second armature block 5 becomes the V-phase. Similarly, the winding start of the armature coil 11 of the third armature block 6 is in the W phase. FIG. 3 shows the situation of the cogging thrust generated by the above configuration. In the figure,
TC1 is the cogging thrust generated by the first armature block 4, TC2 is the cogging thrust generated by the second armature block 5, and TC3 is the third armature block 6.
It can be seen that the cogging thrust generated by the three factors cancels the cogging thrust due to the combination of the three.

FIG. 4 shows a second embodiment.
The case where the number of armature blocks is 3, the number of teeth per armature block is 9, and the number of field poles per armature block is 6 is shown. The field pole 1 is made of a permanent magnet, and the stator 2
It is provided at equal pitch on the side. An armature 3 forming a mover is provided on the stator 2. Armature 3
Are the first armature block 4 and the second armature block 5
And a third armature block 6, with a spacing piece 7 provided between the armature blocks to maintain a gap. The gap size in this case is 1/3 of the magnetic pole pitch Pm. The armature blocks 4, 5, 6 and the spacing pieces 7 are arranged in the thrust direction and are integrally held by fixing means 8. The block teeth 9 of the armature blocks 4, 5, and 6 have nine teeth 1 arranged at the same tooth pitch Pt.
0 is provided. A concentrated winding armature coil 11 is wound around each tooth 10. The field pole 1 may be of a permanent magnet type or a winding excitation type.
Are arranged at an equal pitch Pm over the entire length of the stator 2 having a length obtained by adding a linear motor stroke to the entire length in the thrust direction. Since the magnetic pole pitch Pm is an electrical angle of 180 °,
The gap dimension Pm × １ ／ is 60 electrical degrees. Also,
The tooth pitch Pt is set to an electrical angle of 120 °. Therefore, the armature coil arrangement of each of the armature blocks 4, 5, and 6 is as shown in FIG. That is, in the first armature block 4, the armature coil 11 is wound in the order of the U-phase coil, the V-phase coil, and the W-phase coil, and in the second armature block 5, the winding direction of the first armature block. The third armature block 6 winds the armature coil 11 in the order of the V-phase coil, the W-phase coil, and the U-phase coil in the reverse direction. If the number of armature blocks exceeds three and becomes six, nine, or twelve blocks, the above arrangement is repeated to make three-phase balanced connections for each phase coil. When the armature coil 11 is provided in this manner, the coil arrangement of the armature 3 in the thrust direction is as shown in FIG. 5B, and the electrical angle of the first armature block 4 is 60 after the last coil W phase. Due to the presence of the interval pieces 7, the winding of the armature coil 11 of the second armature block 5 starts in the W phase opposite to the winding direction of the first armature block. Similarly, the winding start of the armature coil 11 of the third armature block 6 becomes the V phase.
FIG. 6 shows the situation of the cogging thrust generated by the above configuration. In the figure, TC1 is the cogging thrust generated by the first armature block 4, TC2 is the cogging thrust generated by the second armature block 5, and TC3 is the cogging thrust generated by the third armature block 6. Thus, it can be seen that the combination of the three cancels the cogging thrust.

FIG. 7 is a longitudinal sectional view of a linear motor according to a third embodiment. In this embodiment, similarly to the first embodiment, the armature 3 has first, second, and third armature blocks 4, 5, and 6 having nine teeth 10 on a block core 9. An interval piece 7 having a dimension of 2/3 (120 electrical angle) of the magnetic pole pitch Pm is arranged between the armature blocks, and the armature blocks are separated from each other and are integrally held by fixing means 8. However, the number of field poles 1 provided on the stator 2 is ten per armature block. Then, as shown in FIG. 8A, three teeth are grouped, and the first armature block 4 has a U-phase coil and a W-phase coil in order to make the armature coils have a phase shift of 120 °. The armature coil is wound in the order of the coil and the V-phase coil, and the V-phase coil, U
The armature coils 11 are wound in the third armature block 6 in the order of the W-phase coil, the V-phase coil, and the U-phase coil in the order of the phase coil and the W-phase coil. At this time, the arrangement of the coil and the spacing piece 7 in the thrust direction is as shown in FIG. Also in this embodiment, the cogging thrusts TC1, TC generated by the end effect of the first, second, and third armature blocks.
2, TC3 produces a phase difference of 120 ° as shown in FIG. 9 and their sum becomes zero and is cancelled.

FIG. 10 is a longitudinal sectional view of a linear motor according to a fourth embodiment. In the case of this embodiment, the number of field magnetic poles 1 provided on the stator 2 is ten per armature block, and the number of teeth 10 of the block core 9 of the armature 3 is nine. This is the same as in the third embodiment. The difference is that the dimension of the spacing piece 12 between the first, second, and third armature blocks 4, 5, and 6 is set to 1/3 of the magnetic pole pitch Pm, and the thrust of the fixing means 13 of the armature 3 is changed. The point is that the dimension in the direction has been shortened. That is, an example is shown in which each armature block is shifted by 60 degrees in electrical angle. For this reason, the armature coil arrangement is such that, as shown in FIG.
W-phase coil and V-phase coil are sequentially wound in order from the end,
In the second armature block 5, the first armature block 4
In order to shift the phase by an electrical angle of 60 °, a W-phase coil, a V-phase coil, and a U-phase coil, whose winding directions are reversed, are sequentially wound. In order to obtain a phase difference of 60 ° with the slave block 5, the coils are wound in the same winding direction as the coil of the first armature block 4, in the order of V-phase coil, U-phase coil, and W-phase coil. The arrangement of the armature coils thus wound in the thrust direction is shown in FIG.
This is shown in (b). The cogging thrust TC generated in the first armature block 4 by this armature coil arrangement
1. Cogging thrust TC generated in the second armature block 5
The cogging thrusts TC3 generated in the second and third armature blocks 6 each have a phase difference of 60 ° as shown in FIG. 12, their sum is zero, and the cogging thrusts are cancelled.

FIG. 13 is a longitudinal sectional view of a linear motor according to a fifth embodiment. In this embodiment,
The dimensional arrangement of the field magnetic poles 1 provided on the stator 2 and the dimensional structure of the block core 9 including the number of teeth 10 are the same as those of the fourth embodiment, but the armature 3 is the first electric machine. A point that the armature block 4 and the second armature block 5 are divided into two parts, a gap between the armature blocks, that is, a width dimension of the spacing piece 14 is １ ／ of the magnetic pole pitch Pm, and fixing means 15. Is reduced by one armature block.
Therefore, the armature coil arrangement shown in FIG. 14A is adopted for each armature block. That is, the nine teeth 10 are divided into three groups in the first armature block 4, and the armature coils are wound in the order of the U-phase coil, the W-phase coil, and the V-phase coil, and In child block 5,
The first and second teeth have W-phase coils,
The fourth and fifth teeth have V-phase coils, the sixth and fifth teeth, respectively.
A U-phase coil is wound around the seventh and eighth teeth, and a W-phase coil is wound around the ninth tooth. FIG. 14B shows an arrangement of the armature coils and the spacing pieces 14 in the thrust direction in this case. With this configuration, as shown in FIG. 15, the cogging thrust TC1 by the first armature block 4 and the cogging thrust TC2 by the second armature block 5 are:
There is a phase difference of 90 ° with respect to each other, and the sum thereof becomes zero and the sum is cancelled. FIG. 16 is a vector diagram illustrating a circulating current according to the present embodiment. First armature block 4
By connecting the in-phase coils of the second armature block and the in-phase coils of the second armature block in series, as shown in FIG. 16, the phases of the magnetomotive force vectors generated in both armature blocks are combined to eliminate the circulating current. it can.

FIG. 17 shows a sixth embodiment. In this case, an example is shown in which only the armature coil portion of the fifth embodiment is changed. That is, the first armature block 4
, The armature coils are wound in the order of three teeth groups in the order of the U-phase coil, the W-phase coil, and the V-phase coil, and the second armature block 5 includes the V-phase coil and the U-phase coil.
By winding the phase coil and the W-phase coil, three-phase balanced connection can be performed with a phase difference of 90 °. In this case,
FIG. 17 shows the arrangement of the armature coils and the spacing pieces 14 in the thrust direction.
(B). Also in this embodiment, as shown in FIG. 15, the cogging thrust TC1 of the first armature block and the cogging thrust T2 of the second armature block which are out of phase by 90 °.
C2 is offset. Further, similarly to the fifth embodiment,
By combining the magnetomotive force vectors, the circulating current can be eliminated.

FIG. 18 shows a seventh embodiment. In the case of this embodiment, as shown in FIG.
Of the first armature block 16 and the second armature block
12 teeth 20 are provided on the block core 19 of the armature block 17 having a tooth pitch Pt of 150.
° set. A gap of の of the magnetic pole pitch Pm is provided between the armature blocks 16 and 17, and an interval piece 21 is provided there, and is integrally held by fixing means 22. The field magnetic poles 1 arranged on the stator 2 are provided ten per armature block. That is, armature block 1
The length in the thrust direction of 6, 17 is 10 times the magnetic pole pitch Pm. Here, as shown in FIG. 19, the armature coil 23 provided in the first armature block 16 has a positively wound U-phase coil, a positively wound V-phase coil, a reversely wound V-phase coil for each group of three teeth. Winding u-phase coil, reverse winding v
The coils are wound in the order of the phase coils. As shown in FIG. 19, the second armature block 17 is wound with a forward winding V-phase coil, a backward winding u-phase coil, a backward winding v-phase coil, and a forward winding U-phase coil. The armature coils of the block are connected in two phases. The armature coil arrangement in the thrust direction in this case is as shown in FIG. As a result, the phase difference between the two armature blocks becomes 90 °, and the cogging thrust is canceled to zero as in the case shown in FIG.

An eighth embodiment in which a three-phase armature coil is applied to the armature block of the seventh embodiment will be described. In this case, the teeth of each armature block are grouped into two groups, and the first armature block 16 has a forward winding U-phase coil and a reverse winding v as shown in FIG.
The armature coils are wound in the order of a phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, a reverse winding w-phase coil, and the second armature block 1
7 has a forward winding V-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, a reverse winding w-phase coil, a forward winding U-phase coil, and a reverse winding v The armature coils are wound in the order of the phase coils to form a three-phase connection. The arrangement of the armature coils in this case in the thrust direction is shown in FIG.
8 (c). Also in this embodiment, the phase difference between the armature blocks is 90 °, so that the cogging thrust becomes zero as in the case shown in FIG.

FIG. 21A is a longitudinal sectional view of a linear motor according to a ninth embodiment. In the case of this embodiment, the number of the field poles 1 provided on the stator 2 is 10 per armature block, and the number of divisions of the armature 3 is three.
Each block core 19 of the third armature blocks 16, 17, 18 has 12 teeth (the tooth pitch Pt is 150 electrical degrees). Then, three sets of armature blocks are integrally held by fixing means 25 by inserting a spacing piece 24 having a size of ／ of the magnetic pole pitch Pm between the armature blocks. In this embodiment, as shown in FIG. 22, three teeth 20 are grouped to form a positive winding U.
The armature coils are wound in the order of the phase coil, the forward winding V-phase coil, the reverse winding u-phase coil, the reverse winding v-phase coil, and the reverse winding u-phase is wound on the tooth group of the block core of the second armature block. Winding the armature coil in the order of coil, reverse winding v-phase coil, forward winding U-phase coil, reverse winding v-phase coil, reverse winding u-phase coil,
In the tooth group of the block core of the third armature block, in the order of the reverse winding v-phase coil, the forward winding U-phase coil, the reverse winding v-phase coil, the forward winding U-phase coil, and the forward winding V-phase coil. The armature coil is wound into two-phase connection. The arrangement of the armature coils in the thrust direction is shown in FIG.
This is shown in (b). The phase difference between the armature blocks of this embodiment is 120 °, and the sum of the cogging thrusts TC1, TC2, TC3 by the first, second, and third armature blocks is the same as in the case shown in FIG. It becomes zero and is canceled.

Next, a description will be given of a tenth embodiment in which the armature 3 of the ninth embodiment is used to form a three-phase system.
As shown in FIG. 23, two teeth are grouped and the first
The arm groups of the armature blocks have a group of teeth wound in the forward direction such that a forward winding U-phase coil, a reverse winding v-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, and a forward winding V
The armature coil is wound in the order of the phase coil and the reverse winding w-phase coil, and the forward winding V-phase coil and the reverse winding w are wound around the tooth group of the block core of the second armature block.
The armature coils are wound in the order of a phase coil, a forward winding U-phase coil, a reverse winding v-phase coil, a forward winding W-phase coil, and a reverse winding u-phase coil, and the teeth of the block core of the third armature block are wound. The armature coils are arranged in a group in the order of a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, a reverse winding w-phase coil, a forward winding U-phase coil, and a reverse winding v-phase coil. It is a winding three-phase connection. Also in this embodiment, the phase difference is 120 °.
Thus, as shown in FIG. 9, the cogging thrust becomes zero.

FIG. 24A is a longitudinal sectional view of a linear motor according to an eleventh embodiment. In this embodiment,
Except for the spacing piece 26, the fixing means 27 and the armature coil arrangement, the configuration is the same as that of the ninth and tenth embodiments. That is, the spacing piece 26 provided between the first, second, and third armature blocks 16, 17, and 18 is １ ／ of the magnetic pole pitch Pm (60 ° in electrical angle). 17, 1
8 and the spacing piece 26 are integrally held by fixing means 27. As shown in FIG. 25, the armature coil 23 is provided with three teeth as a group, and is wound in the forward direction U around the tooth group of the block core of the first armature block.
The armature coils are wound in the order of the phase coil, the forward winding V-phase coil, the reverse winding u-phase coil, the reverse winding v-phase coil, and the forward winding V-phase is inserted into the tooth group of the block core of the second armature block. Winding the armature coil in the order of coil, forward winding U-phase coil, forward winding V-phase coil, reverse winding u-phase coil, reverse winding v-phase coil,
A reverse-winding u-phase coil, a reverse-winding v-phase coil, a forward-winding U-phase coil, a forward-winding V-phase coil, and a reverse-winding u-phase coil are arranged in the order of the tooth group of the block core of the third armature block. The armature coil is wound and two-phase connection is made. FIG. 24B shows the arrangement of the armature coils in the thrust direction.
Is shown in With this configuration, the cogging thrust is canceled and becomes zero as shown in FIG.

In the twelfth embodiment, the armature coil according to the eleventh embodiment has a three-phase connection. In this case, as shown in FIG. 26, the two teeth are grouped into a tooth group of a block core of the first armature block, and a forward winding U-phase coil, a reverse winding v-phase coil, and a forward winding W-phase coil. The armature coil is wound in the order of the coil, the reverse-winding u-phase coil, the forward-winding V-phase coil, and the reverse-winding w-phase coil, and the reverse-winding w-phase coil is inserted into the tooth group of the block core of the second armature block. , The armature coils are wound in the order of a forward winding U-phase coil, a reverse winding v-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, and a third armature block. Block core teeth group with forward winding V-phase coil, reverse winding w-phase coil, forward winding U-phase coil, reverse winding v-phase coil, forward winding W-phase coil, reverse winding Three-phase connection winding the armature coils in the phase coils order. The armature coil arrangement in the thrust direction in this embodiment is shown in FIG. Also, the phase difference between the armature blocks of this embodiment is 60
°, and the cogging thrust is zero as in the case of FIG.

FIGS. 27 (a) and 27 (b) show an example of the structure of a linear motor. FIG. 27 (a) is a plan view of the partially cut linear motor viewed from above, and FIG. 27 (b) is a view perpendicular to the thrust direction A of the linear motor. It is a longitudinal cross-sectional view of a surface. The block core 28 constituting the armature block has an engagement protrusion 28b formed on one side,
On the opposite side, there is provided a yoke portion 28a formed with an engagement portion 28c that meshes with the engagement protrusion 28b, and the yoke portions 28a are sequentially fitted and connected. Further, the armature coils 31 are housed in the teeth 28d in an aligned winding. Further, the armature block 28 is held on the table 29 via bolts 29a. The field magnetic poles 33 held by the stator 32 are provided so as to be sandwiched through gaps on both sides in the longitudinal direction of the block core row. Reference numeral 30 denotes a cooling passage for cooling the armature coil 31. FIG. 28 shows an example of forming a block core. A plurality of T-shaped core segments 36 having a lower end forming a teeth portion 34 and an upper end forming a yoke portion 35 are provided on the yoke portion 35. An example is shown in which the engagement protrusions 38 are fitted to the engagement portions 37 and connected to each other so that the armature coils 39 can be arranged.
FIG. 29 shows a temperature sensor 40 in the embodiment shown in FIG. 7 in the space above the spacing piece 7 provided between the first, second, and third armature blocks,
The contact arm is held in contact with an adjacent armature coil at a. By doing so, the internal temperature of the armature coil can be detected.

[0019]

As described above, according to the present invention, there are provided field poles arranged at equal pitches, and an armature facing the field pole, and the armature is divided into a plurality of armature blocks. The armature blocks are arranged in the direction of thrust, and the block core of each armature block is provided with teeth of an integral multiple of the number of phases arranged at an equal pitch and armature coils concentratedly wound around the teeth. Between the blocks, a gap corresponding to an electrical angle that is an integral multiple of the value obtained by dividing the magnetic pole pitch by the number of armature blocks is provided, and the armature coils of each armature block correspond to the gap between the armature blocks. The phase is shifted by the electrical angle of the armature block, so that the cogging thrust between the armature blocks can be canceled out to zero, and the armature coil is concentratedly wound, so that the flux linkage of the magnetic poles Is maximized, It becomes capable of providing the accuracy of the linear motor. In addition, since a gap is provided between the armature blocks, a temperature sensor can be provided at this portion, and the temperature detection accuracy can be improved. In addition to the above basic effects, claims 2
According to No. 4, the gap between the armature blocks is one of the magnetic pole pitch.
Since the ratio is ／ or ／, the degree of freedom in installing the temperature sensor is improved. According to the fifth aspect, since the gap between the armature blocks is 1/3 of the magnetic pole pitch, the length of the armature in the thrust direction can be reduced. In the case of claims 6 to 9, since a minimum of two armature blocks can be obtained, a linear motor with small inertia can be obtained when the armature is a mover. An efficient linear motor with no efficiency can be obtained. The tenth and eleventh aspects are advantageous in designing a linear motor having a large thrust and have a high degree of freedom in setting a temperature sensor. According to the twelfth and thirteenth aspects, it is convenient for the design of a linear motor having a large thrust, and the length of the armature in the thrust direction can be shortened by the shortened gap size. Further, according to the fourteenth aspect, the size of the linear motor can be reduced. According to the fifteenth aspect, the formation of the block core is simple and the degree of freedom is increased. According to the sixteenth aspect, the temperature sensor can be brought into close contact with the armature coil, and the temperature detection accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a linear motor according to a first embodiment of the present invention.

FIGS. 2A and 2B are armature coil arrangement diagrams of the first embodiment, wherein FIG. 2A shows an armature coil arrangement and FIG. 2B shows an arrangement of armature coils in a thrust direction.

FIG. 3 is an explanatory diagram of a cogging thrust according to the first embodiment.

FIG. 4 is a longitudinal sectional view of a linear motor according to a second embodiment of the present invention.

5A and 5B are diagrams showing armature coil arrangements according to the second embodiment, wherein FIG. 5A shows an armature coil arrangement, and FIG. 5B shows an arrangement of armature coils in a thrust direction.

FIG. 6 is an explanatory diagram of a cogging thrust according to a second embodiment.

FIG. 7 is a longitudinal sectional view of a linear motor according to a third embodiment of the present invention.

FIG. 8 is an armature coil arrangement diagram of the third embodiment, wherein (a) shows the armature coil arrangement and (b) shows the arrangement of the armature coils in the thrust direction.

FIG. 9 is an explanatory diagram of a cogging thrust according to a third embodiment.

FIG. 10 is a longitudinal sectional view of a linear motor according to a fourth embodiment of the present invention.

11A and 11B are diagrams illustrating armature coil arrangements according to a fourth embodiment, in which FIG. 11A illustrates an armature coil arrangement, and FIG. 11B illustrates an arrangement of armature coils in a thrust direction.

FIG. 12 is an explanatory diagram of a cogging thrust according to a fourth embodiment.

FIG. 13 is a longitudinal sectional view of a linear motor according to a fifth embodiment of the present invention.

14A and 14B are diagrams illustrating an armature coil arrangement according to a fifth embodiment, in which FIG. 14A illustrates an armature coil arrangement, and FIG. 14B illustrates an arrangement of armature coils in a thrust direction.

FIG. 15 is an explanatory diagram of a cogging thrust according to a fifth embodiment.

FIG. 16 is a vector diagram illustrating a circulating current according to the fifth embodiment.

17A and 17B are diagrams illustrating armature coil arrangement according to the sixth embodiment, in which FIG. 17A illustrates an armature coil arrangement, and FIG. 17B illustrates an arrangement of armature coils in a thrust direction.

FIG. 18 is an explanatory diagram of the seventh and eighth embodiments;
(A) is a longitudinal sectional view of a linear motor, (b) is a thrust direction arrangement diagram of an armature coil according to a seventh embodiment, and (c) is an eighth embodiment.
It is a thrust direction arrangement | sequence diagram of the armature coil of embodiment.

FIG. 19 is an armature coil layout diagram of the seventh embodiment.

FIG. 20 is an armature coil layout diagram of the eighth embodiment.

FIGS. 21A and 21B are explanatory views of ninth and tenth embodiments, wherein FIG. 21A is a longitudinal sectional view of a linear motor, FIG. 21B is a thrust direction arrangement diagram of armature coils of the ninth embodiment, (C) is a thrust direction arrangement diagram of the armature coil of the tenth embodiment.

FIG. 22 is an arrangement diagram of armature coils according to a ninth embodiment.

FIG. 23 is an armature coil arrangement diagram of the tenth embodiment.

FIGS. 24A and 24B are explanatory diagrams of the eleventh and twelfth embodiments, wherein FIG. 24A is a longitudinal sectional view of a linear motor, and FIG.
(C) Thrust direction array diagram of the armature coil according to the embodiment.
FIG. 27 is a thrust direction arrangement diagram of the armature coil according to the twelfth embodiment.

FIG. 25 is an arrangement diagram of armature coils according to the eleventh embodiment.

FIG. 26 is an arrangement diagram of armature coils according to a twelfth embodiment.

FIG. 27 is a longitudinal sectional view of a plane perpendicular to the thrust direction of the linear motor.

FIG. 28 is a plan view illustrating a core segment according to the present invention.

FIG. 29 is a vertical cross-sectional view of a linear motor explaining the installation state of a temperature sensor according to the present invention.

FIG. 30 is an explanatory diagram of a conventional linear motor.

[Explanation of symbols]

 1, 33 field magnetic pole 2, 32 stator 3 armature 4, 16 first armature block 5, 17 second armature block 6, 18 third armature block 7, 12, 14, 21 spacing piece 9, 19 Block core 11, 31, 39 Armature coil 10, 20, 28d, 34 Teeth 28, 35, 36 Core segment (block core) 28a Yoke portion 28b, 38 Engagement protrusion 28c, 37 Engagement portion 29 Table 29a bolt 30 refrigerant passage 40 temperature sensor

Claims (16)

[Claims] 1. An armature comprising: field magnetic poles arranged at an equal pitch; and an armature facing the field magnetic pole. The armature is divided into a plurality of armature blocks and arranged in a thrust direction.
The block core of each armature block is provided with teeth of an integral multiple of the number of phases arranged at an equal pitch and an armature coil concentratedly wound around the teeth. A gap is provided corresponding to an electrical angle that is an integral multiple of the value divided by the number of blocks, and the armature coils of each armature block are wound with their phases shifted by an electrical angle corresponding to the gap between the armature blocks. A linear motor characterized by: 2. The number of armature blocks is an integral multiple of three,
A gap having a size of 2/3 of the magnetic pole pitch is provided between each armature block.
(A = integer) teeth are provided at an equal pitch, the number of field poles per armature block is arranged at an equal pitch as 2 × a (a = integer), and the teeth of the block core of the first armature block are arranged. , The armature coil is wound in the order of the U-phase coil, the V-phase coil, and the W-phase coil, and all of the teeth of the block core of the second armature block have the V-phase coil, the W-phase coil, and the U-phase coil. The armature coils are wound in the order, and all the teeth of the block core of the third armature block are wound with the armature coils in the order of the W-phase coil, the U-phase coil, and the V-phase coil. 2. The linear motor according to claim 1, wherein the coil arrangement is repeated when the number of coils exceeds the limit, and the phase coils of each armature block are three-phase balanced. 3. The number of armature blocks is an integral multiple of three,
A gap having a size of 1/3 of the magnetic pole pitch is provided between each armature block, and a block core of each armature block has 3 × a
(A = integer) teeth are provided at an equal pitch, the number of field poles per armature block is arranged at an equal pitch as 2 × a (a = integer), and the teeth of the block core of the first armature block are arranged. , The armature coil is wound in the order of the U-phase coil, the V-phase coil, and the W-phase coil, and all the teeth of the block core of the second armature block have the winding direction opposite to that of the first armature block. And armature coils are wound in the order of the W-phase coil, the U-phase coil, and the V-phase coil, and the order of the V-phase coil, the W-phase coil, and the U-phase coil is applied to all of the teeth of the block core of the third armature block. 2. The linear motor according to claim 1, wherein when the number of armature blocks exceeds three, the coil arrangement is repeated, and each phase coil of each armature block is three-phase balanced. . 4. The use of three armature blocks, the length in the thrust direction of each armature block being 10 times the field pole pitch, and the use of nine teeth on the block core of each armature block. A pitch of 2/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction,
Grouping the teeth of the block core of each armature block into groups of three, and winding the armature coils in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the tooth group of the block core of the first armature block, The armature coils are wound in the order of the V-phase coil, the U-phase coil, and the W-phase coil in the tooth group of the block core of the second armature block, and the W-phase coil is inserted into the tooth group of the block core of the third armature block. The armature coil is wound in the order of the V-phase coil and the U-phase coil, and the armature coil is turned at 120 °.
3. The linear motor according to claim 1, wherein the three-phase balanced connection is performed by arranging the three phase differences. 5. The use of three armature blocks, the length in the thrust direction of each armature block being 10 times the field pole pitch, and the use of nine teeth on the block core of each armature block. Provided at a pitch, and a gap having a dimension of 1/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction,
Grouping the teeth of the block core of each armature block into groups of three, and winding the armature coils in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the tooth group of the block core of the first armature block, The third armature block is wound around the tooth group of the block core in the order of the W-phase coil, the V-phase coil, and the U-phase coil with the winding direction reversed with respect to the first armature block. The armature coil is wound around the tooth group of the block core of the armature block in the same direction as the first armature block in the order of the V-phase coil, the U-phase coil, and the W-phase coil,
2. The linear motor according to claim 1, wherein the armature coils are arranged with a phase difference of 60 [deg.] And are connected in a three-phase balanced manner. 6. The use of two armature blocks, the length of each armature block in the thrust direction being 10 times the field pole pitch, and the use of nine teeth on the block core of each armature block. Provided at a pitch, and a gap of a half of the magnetic pole pitch is provided between each armature block and arranged in the thrust direction,
Grouping the teeth of the block core of each armature block into groups of three, and winding the armature coils in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the tooth group of the block core of the first armature block, First and second tooth groups of the block core of the second armature block
W-phase coils, 3rd, 4th, 5th
Armature coils are wound in the order of a V-phase coil, a U-phase coil in the sixth, seventh, and eighth teeth, and a W-phase coil in the ninth tooth, respectively. 2. The linear motor according to claim 1, wherein the motors are arranged with a phase difference of .degree. 7. The use of two armature blocks, the length in the thrust direction of each armature block being 10 times the field pole pitch, and the use of nine teeth on the block core of each armature block. Provided at a pitch, and a gap of a half of the magnetic pole pitch is provided between each armature block and arranged in the thrust direction,
Grouping the teeth of the block core of each armature block into groups of three, and winding the armature coils in the order of the U-phase coil, the W-phase coil, and the V-phase coil in the tooth group of the block core of the first armature block, An armature coil is wound around the tooth group of the block core of the second armature block in the order of V-phase coil, U-phase coil, and W-phase coil, and the armature coils are arranged with a phase difference of 90 ° to perform three-phase balanced connection. The linear motor according to claim 1, wherein: 8. A block core of each armature block, wherein 2 × c (c = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to ten times the field pole pitch. , 12 teeth are provided at equal pitches, a gap of a half of the magnetic pole pitch is provided between each armature block, and the gap is arranged in the thrust direction. And a positive winding U around the tooth group of the block core of the first armature block.
The armature coils are wound in the order of the phase coil, the forward winding V-phase coil, the reverse winding u-phase coil, the reverse winding v-phase coil, and the forward winding V-phase is inserted into the tooth group of the block core of the second armature block. The armature coil is wound in the order of coil, reverse wound u-phase coil, reverse wound v-phase coil, and forward wound U-phase coil. If the number of armature blocks exceeds 2, repeat the above and wind the armature coil. The linear motor according to claim 1, wherein the motor is a two-phase connection. 9. A block core of each armature block, wherein 2 × d (d = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to 10 times the field pole pitch. , 12 teeth are provided at equal pitches, a gap of a half of the magnetic pole pitch is provided between each armature block and arranged in the thrust direction, and the teeth of the block core of each armature block are arranged in pairs. And a positive winding U around the tooth group of the block core of the first armature block.
The armature coils are wound in the order of a phase coil, a reverse winding v-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, and a reverse winding w-phase coil,
The tooth group of the block core of the second armature block includes a forward winding V-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, a forward winding V-phase coil, a reverse winding w-phase coil, and a forward winding. An armature coil is wound in the order of a wound U-phase coil and a reverse-wound v-phase coil, and when the number of armature blocks exceeds 2, the above is repeated to form a three-phase connection by winding the armature coil. Item 7. The linear motor according to Item 1. 10. A block core of each armature block, wherein 3 × e (e = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to 10 times the field pole pitch. 12 teeth are provided at an equal pitch, a gap having a size of 2/3 of the magnetic pole pitch is provided between the armature blocks and arranged in the thrust direction, and three teeth of the block core of each armature block are arranged. The armature coils are grouped into a tooth group of the block core of the first armature block in the order of a forward winding U-phase coil, a forward winding V-phase coil, a reverse winding u-phase coil, and a reverse winding v-phase coil. The reverse winding u-phase coil, the reverse winding v-phase coil, the forward winding U-phase coil, the reverse winding v-phase coil,
The armature coils are wound in the order of the reverse-winding u-phase coils, and the reverse-winding v-phase coils, the forward-winding U-phase coils, the reverse-winding v-phase coils, The armature coil is wound in the order of the direction winding U-phase coil and the forward winding V-phase coil,
2. The linear motor according to claim 1, wherein when the number of armature blocks exceeds three, the above operation is repeated to form a two-phase connection by winding an armature coil. 11. A block core of each armature block, wherein 3 × f (f = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to 10 times the field pole pitch. 12 teeth are provided at equal pitches, a gap having a size of 2/3 of the magnetic pole pitch is provided between each armature block and arranged in the thrust direction, and two teeth of the block core of each armature block are provided. A group of teeth of the block core of the first armature block is provided with a forward winding U-phase coil, a reverse winding v-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, and a forward winding V-phase coil. ,
The armature coils are wound in the order of the reverse-wound w-phase coils, and the forward-wound V-phase coil, the reverse-wound w-phase coil, the forward-wound U-phase coil, The armature coil is wound in the order of the direction-wound v-phase coil, the forward-wound W-phase coil, and the reverse-wound u-phase coil, and the forward-wound W-phase coil and the reverse direction are wound in the tooth group of the block core of the third armature block. When armature coils are wound in the order of wound u-phase coil, forward wound V-phase coil, backward wound w-phase coil, forward wound U-phase coil, reverse wound v-phase coil, and the number of armature blocks exceeds three 2. The linear motor according to claim 1, wherein the armature coil is wound around to form a three-phase connection. 12. A block core of each armature block, wherein 3 × g (g = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to ten times the field pole pitch. 12 teeth are provided at equal pitches, a gap having a dimension of 1/3 of the magnetic pole pitch is provided between each armature block and arranged in the thrust direction, and three teeth of the block core of each armature block are provided. The armature coils are grouped into a tooth group of the block core of the first armature block in the order of a forward winding U-phase coil, a forward winding V-phase coil, a reverse winding u-phase coil, and a reverse winding v-phase coil. A winding V-phase coil, a forward winding U-phase coil, a forward winding V-phase coil, a reverse winding u-phase coil,
The armature coils are wound in the order of the reverse-winding v-phase coil, and the reverse-winding u-phase coil, the reverse-winding v-phase coil, the forward-winding U-phase coil, the positive winding are wound around the tooth group of the block core of the third armature block. The armature coil is wound in the order of the direction winding V phase coil and the reverse winding u phase coil,
2. The linear motor according to claim 1, wherein when the number of armature blocks exceeds three, the above operation is repeated to form a two-phase connection by winding an armature coil. 13. A block core of each armature block, wherein 3 × h (h = integer) armature blocks are used, and the length of each armature block in the thrust direction is set to 10 times the field pole pitch. 12 teeth are provided at equal pitches, a gap having a dimension of 1/3 of the magnetic pole pitch is provided between each armature block and arranged in the thrust direction, and two teeth of the block core of each armature block are provided. A group of teeth of the block core of the first armature block is provided with a forward winding U-phase coil, a reverse winding v-phase coil, a forward winding W-phase coil, a reverse winding u-phase coil, and a forward winding V-phase coil. ,
The armature coils are wound in the order of the reverse-wound w-phase coil, and the reverse-wound w-phase coil, the forward-wound U-phase coil, the reverse-wound v-phase coil, and the positive coil are wound in the tooth group of the block core of the second armature block. The armature coils are wound in the order of the direction-wound W-phase coil, the reverse-wound u-phase coil, and the forward-wound V-phase coil, and the forward-wound V-phase coil and the reverse direction are wound in the tooth group of the block core of the third armature block. When the armature coils are wound in the order of winding w-phase coil, forward winding U-phase coil, reverse winding v-phase coil, forward winding W-phase coil, reverse winding u-phase coil, and the number of armature blocks exceeds three. 2. The linear motor according to claim 1, wherein the armature coil is wound around to form a three-phase connection. 14. A yoke section comprising a block core constituting the armature block, the yoke section having an engagement section formed on one side and an engagement section formed on the opposite side to be fitted to the engagement projection. And a core segment composed of teeth for winding each armature coil, and that the field magnetic poles are arranged so as to sandwich the longitudinal direction of the block core row formed by sequentially connecting the core segments from both sides. The linear motor according to any one of claims 1 to 13, wherein: 15. A block core constituting the armature block, wherein a plurality of T-shaped core segments having lower ends forming teeth and upper ends forming yoke portions are connected to each other by yoke portions. The linear motor according to any one of claims 1 to 14, further comprising a blocked core. 16. A gap between the armature blocks, wherein the yoke of the block core is supported by a magnetic spacer, and a temperature sensor is molded and supported in a space above the spacer. Item 16. The linear motor according to any one of Items 1 to 15.