JP2021077746A - Multilayer coil substrate and coil substrate for motor - Google Patents

Abstract

To provide a highly efficient coil substrate for a motor.SOLUTION: A coil substrate for a motor according to an embodiment of the present invention is formed by winding a multilayer coil substrate. The multilayer coil substrate includes a first flexible substrate, a coil formed on the first flexible substrate (coil on the first substrate), a second flexible substrate laminated on the first flexible substrate and the coil on the first substrate, and a coil formed on the second flexible substrate (coil on the second substrate). The second flexible substrate is laminated on the first flexible substrate such that the coil on the first substrate and the coil on the second substrate partially overlap each other.SELECTED DRAWING: Figure 3

Description

The present invention relates to a laminated coil substrate and a coil substrate for a motor.

Patent Document 1 relates to an electric motor, and the electric motor includes a plurality of single coils made of wires.

JP-A-2007-124892

[Issues in patent literature]
The electric motor of Patent Document 1 includes a plurality of single coils made of wires. The coil is made of wire. If the wire is thin, it may be difficult to wind the wire. For example, the wire may break. It is considered difficult to wind the wire with high position accuracy. In that case, it is presumed that the space factor will decrease.

The laminated coil substrate according to the present invention includes a first flexible substrate, a coil formed on the first flexible substrate (a coil on the first substrate), the first flexible substrate, and a coil on the first flexible substrate. It is composed of a second flexible substrate laminated on the top and a coil (coil on the second substrate) formed on the second flexible substrate. The second flexible substrate is laminated on the first flexible substrate so that the coil on the first substrate and the coil on the second substrate partially overlap each other.

The coil substrate for a motor according to the present invention is formed by winding a laminated coil substrate. The laminated coil substrate is laminated on the first flexible substrate, the coil formed on the first flexible substrate (the coil on the first substrate), the first flexible substrate, and the coil on the first substrate. It is composed of a second flexible substrate and a coil (coil on the second substrate) formed on the second flexible substrate. The second flexible substrate is laminated on the first flexible substrate so that the coil on the first substrate and the coil on the second substrate partially overlap each other.

[Effect of embodiment]
According to an embodiment of the present invention, the coil is formed of wiring. For example, a coil can be formed by the technique of a printed wiring board. Therefore, the cross-sectional shape of the wiring forming the coil can be made substantially rectangular. The space factor of the coil can be increased. One laminated coil substrate includes at least a first coil substrate and a second coil substrate. The first coil substrate is formed of a first flexible substrate and a coil on the first substrate. The second coil substrate is formed of a second flexible substrate and a coil on the second substrate. In the embodiment, the laminated coil substrate is formed by laminating the second coil substrate on the first coil substrate. According to the embodiment, it is not necessary to fold the coil substrate between adjacent coils. Therefore, the coils can be laminated by a simple method. It is possible to provide a laminated coil substrate having a high space factor. By stacking the substrates, at least one coil on the second substrate is laminated on the coil on the first substrate.
A coil substrate for a motor is formed by winding a laminated coil substrate. By processing the substrate, a coil substrate for a motor is manufactured. Easy to manufacture. The yield can be increased. The position accuracy between the coils can be improved. It is possible to provide a laminated coil substrate having a high space factor and a coil substrate for a motor.

1 (A) is a schematic view of a motor, and FIGS. 1 (B), 1 (C), and 1 (D) are schematic views of a coil substrate for a motor according to the first embodiment. FIG. 2A shows a coil substrate for forming a coil substrate for a three-phase motor, and FIG. 2B is a schematic diagram of a laminated coil substrate. 3 (A) shows the coil substrate of the first embodiment, FIG. 3 (B) shows the coil, and FIG. 3 (C) is a schematic view of the coil formed by the wiring group, FIG. 3 (D). Shows the cross sections of the first wiring and the second wiring. FIG. 4 (A) shows a coil substrate for forming the coil substrate for the motor of the second embodiment, and FIGS. 4 (B) and 4 (C) are schematic views showing the overlap of the coils.

[First Embodiment]
The three coil substrates 22U, 22V, and 22W shown in FIG. 2A are prepared. The coil substrates 22U, 22V, and 22W are formed of a flexible substrate 22 having a first surface F and a second surface S opposite to the first surface F, and a coil C formed on the flexible substrate 22. In the example of FIG. 2A, the coil C is formed on the first surface F. The flexible substrate 22 has one end 22L and the other end 22R on the opposite side of the one end 22L. The flexible substrate 22 has an upper side 22T and a lower side 22D opposite to the upper side 22T.

The single coil of Patent Document 1 is formed of a wire. On the other hand, the coil C formed on the coil boards 22U, 22V, 22W of the first embodiment is formed by the technique of the printed wiring board. The wiring w forming the coil C is formed by plating. Alternatively, the wiring w forming the coil C is formed by etching the copper foil. The wiring w forming the coil C is formed by a semi-additive method, an M-Sap method, or a subtractive method.

The wiring w forming the coil C is formed by the technique of the printed wiring board. Therefore, the cross-sectional shape of the wiring w is substantially rectangular. Since the cross section of the wire is circular, the space factor of the coil C can be increased according to the first embodiment.

FIG. 3B shows an example of the coil C. As shown in FIG. 3B, the coil C is formed by the central space SC and the wiring w surrounding the central space SC. The wiring w has an outer end OE and an inner end IE. The wiring w is formed between the outer end OE and the inner end IE. The wiring w forming the coil C is formed in a spiral shape. Of the wiring w, the wiring w located on the outermost side is referred to as the outer wiring Ow. The innermost wiring w among the wirings w is referred to as the inner wiring Iw. A space SC is formed inside the inner wiring Iw.

The wiring w includes a plurality of first wirings 51 and a plurality of second wirings 52 facing each other via the central space SC. The plurality of first wires are electrically connected and are arranged in different turns. The plurality of second wires are electrically connected and are arranged in different turns. In one coil C, the first wiring 51 is close to 22L at one end, and the second wiring 52 is close to 22R at the other end. Each of the first wirings 51 is formed substantially in parallel. Each of the second wirings 52 is formed substantially in parallel. The first wiring 51 and the second wiring 52 are formed substantially in parallel.

Of the plurality of first wirings 51, the wiring located on the outermost side is referred to as the outer first wiring 51Ow.
Of the plurality of first wirings 51, the innermost wiring is referred to as an inner first wiring 51Iw. The inner first wiring 51Iw faces the central space SC.
Of the plurality of second wirings 52, the wiring located on the outermost side is referred to as the outer second wiring 52Ow.
Of the plurality of second wirings 52, the innermost wiring is referred to as the inner second wiring 52Iw. The inner second wiring 52Iw faces the central space SC.

FIG. 3D shows a cross section of the wiring w and a side wall of the wiring w. In FIG. 3D, the first wiring 51 and the second wiring 52 are drawn. The outer first wiring 51Ow has a first side wall sw1 facing 22L at one end. The inner first wiring 51Iw has a second side wall sw2 facing the central space SC. The outer second wiring 52Ow has a third side wall sw3 facing the other end 22R. The inner second wiring 52Iw has a fourth side wall sw4 facing the central space SC.

FIG. 3C shows a simplified coil C. In FIG. 3C, the wiring w of the coil C shown in FIG. 3B is summarized. The first wiring group 51g is formed by the plurality of first wirings 51. The second wiring group 52g is formed by the plurality of second wirings 52.

Each coil C has a distance W1, a distance W2, and a distance W0 shown in FIG. 3C. The distance W1 is the distance between the first side wall sw1 of the outer first wiring 51Ow and the second side wall sw2 of the inner first wiring 51Iw. The distance W1 is the width of the first wiring group 51 g. The distance W2 is the distance between the third side wall sw3 of the outer second wiring 52Ow and the fourth side wall sw4 of the inner second wiring 52Iw. The distance W2 is the width of the second wiring group 52 g. The distance W0 is the width of the central space SC. The distance W0 is the distance between the second side wall sw2 of the inner first wiring 51Iw and the fourth side wall sw4 of the inner second wiring 52Iw. The distance W1, the distance W2, and the distance W0 are measured along a straight line perpendicular to the first wiring 51. The distance W1 and the distance W2 are substantially equal. The distance W0 is approximately twice the distance W1.

FIG. 3A shows coil substrates 22U, 22V, and 22W. In FIG. 3A, the wiring forming the coil is drawn as a wiring group. The coil substrate 22U is a first coil substrate, the coil substrate 22V is a second coil substrate, and the coil substrate 22W is a third coil substrate. It is preferable that the winding method of each coil C forming the coil substrate 22U and the coil substrate 22W is the same. The winding method of each coil C in the first coil substrate 22U and the third coil substrate 22W is the same. Since the winding method of each coil C is the same, when a current flows through the coils C in the first coil substrate 22U and the third coil substrate 22W, the direction of the current flowing through each coil C is the same. The winding method and the direction of the current are observed from the position on the first surface F. It is preferable that the winding method of each coil C forming the first coil substrate 22U and the third coil substrate 22W and the winding method of each coil forming the second coil substrate 22V are reversed. The winding method of each coil C in the first coil substrate 22U and the third coil substrate 22W and the winding method of each coil in the second coil substrate 22V are opposite.

FIG. 3A shows the direction of the current flowing through the coil substrate. The direction of the current is indicated by an arrow, which is drawn above the wiring group. The direction of the current flowing through the coil CU of the first coil board 22U (clockwise) and the direction of the current flowing through the coil CW of the third coil board 22W (clockwise) are the same, and flow through the coil CU of the first coil board 22U. The direction of the current (clockwise) and the direction of the current flowing through the coil CV of the second coil substrate 22V (counterclockwise) are opposite. When the direction of the current flowing through the coil CV of the second coil board 22V is clockwise, the direction of the current flowing through the coil CU of the first coil board 22U and the direction of the current flowing through the coil CW of the third coil board 22W are counterclockwise. It is around.

FIG. 2A shows an example of the outer shape of the coil substrates 22U, 22V, and 22W. The outer shapes of the coil substrates 22U, 22V, and 22W are generally rectangular. The coils C are lined up from one end 22L to the other end 22R. The coil CU closest to one end 22L of the first coil substrate 22U is the first coil CU1, and the coil CU closest to the other end 22R is the Nth coil CUn. The second (m + 1) coil CUm1 is arranged next to the mth coil CUm. Among the mth coil CUm and the (m + 1) th coil CUm1, the mth coil CUm is close to 22L at one end. m and N are natural numbers. The coil CV of the second coil board 22V and the coil CW of the third coil board 22W are arranged in the same manner as the coil CU of the first coil board 22U.

Each coil substrate 22U, 22V, 22W has the same number of coils C. One coil substrate has N coils C. N is preferably a multiple of 3.

In the example of FIG. 3A, the number of coils (N) formed on the coil substrates 22U, 22V, and 22W is 6.
The coil CUs formed on the first coil substrate 22U shown in FIG. 3A are the first coil CU1, the second coil CU2, the third coil CU3, the fourth coil CU4, and the fifth coil CU. Coil CU5 and sixth coil CU6. The first coil CU1 has a first wiring group CU1-51g and a second wiring group CU1-52g. The second coil CU2 has a first wiring group CU2-51g and a second wiring group CU2-52g. The third coil CU3 has a first wiring group CU3-51g and a second wiring group CU3-52g. The fourth coil CU4 has a first wiring group CU4-51g and a second wiring group CU4-52g. The fifth coil CU5 has a first wiring group CU5-51g and a second wiring group CU5-52g. The sixth coil CU6 has a first wiring group CU6-51g and a second wiring group CU6-52g.

The coil CV formed on the second coil substrate 22V is composed of the first coil CV1, the second coil CV2, the third coil CV3, the fourth coil CV4, the fifth coil CV5, and the sixth coil CV6. is there. The first coil CV1 has a first wiring group CV1-51g and a second wiring group CV1-52g. The second coil CV2 has a first wiring group CV2-51g and a second wiring group CV2-52g. The third coil CV3 has a first wiring group CV3-51g and a second wiring group CV3-52g. The fourth coil CV4 has a first wiring group CV4-51g and a second wiring group CV4-52g. The fifth coil CV5 has a first wiring group CV5-51g and a second wiring group CV5-52g. The sixth coil CV6 has a first wiring group CV6-51g and a second wiring group CV6-52g.

The coil CW formed on the third coil substrate 22W is composed of the first coil CW1, the second coil CW2, the third coil CW3, the fourth coil CW4, the fifth coil CW5, and the sixth coil CW6. is there. The first coil CW1 has a first wiring group CW1-51g and a second wiring group CW1-52g. The second coil CW2 has a first wiring group CW2-51g and a second wiring group CW2-52g. The third coil CW3 has a first wiring group CW3-51g and a second wiring group CW3-52g. The fourth coil CW4 has a first wiring group CW4-51g and a second wiring group CW4-52g. The fifth coil CW5 has a first wiring group CW5-51g and a second wiring group CW5-52g. The sixth coil CW6 has a first wiring group CW6-51g and a second wiring group CW6-52g.

The coils CU1, CU2, CU3, CU4, CU5, and CU6 of the first coil substrate 22U are connected in series from one end 22L toward the other end 22R in order. Similarly, the coils CV1, CV2, CV3, CV4, CV5, and CV6 of the second coil substrate 22V are connected in series from one end 22L toward the other end 22R in order. Similarly, the coils CW1, CW2, CW3, CW4, CW5, and CW6 of the third coil substrate 22W are connected in series from one end 22L toward the other end 22R in order. That is, in each coil substrate, the mth coil Cm is connected in series with the (m + 1) th coil Cm1.

The coil boards 22U, 22V, and 22W shown in FIG. 2A have a terminal T connected to the coil C and a terminal board 24 for supporting the terminal T. The number of terminal boards 24 is 2. The terminal T includes an input electrode TI and an output electrode TO. The first input electrode TI of the first coil substrate 22U is connected to the coil CU1 closest to the other end 22L, and the first output electrode TO is connected to the coil CU6 closest to the other end 22R. The second input electrode TI of the second coil substrate 22V is connected to the coil CV1 closest to the other end 22L, and the second output electrode TO is connected to the coil CV6 closest to the other end 22R. The third input electrode TI of the third coil substrate 22W is connected to the coil CW1 closest to the other end 22L, and the third output electrode TO is connected to the coil CW6 closest to the other end 22R. By applying a voltage between the input electrode TI and the output electrode TO, a current flows from the coil closest to 22L at one end to the coil closest to 22R at the other end.

As shown in FIG. 2A, the coil substrates 22U, 22V, 22W have a connecting line cL. In FIG. 2A, the connecting line cL is partially drawn. The connecting wire cL is formed of at least one of a through-hole conductor penetrating the flexible substrate 22, a conductor circuit on the first surface F, and a conductor circuit on the second surface.
The terminal T and the coil C are connected by the connection line cL. One coil C and the next coil C are connected by the connecting wire cL.

As shown in FIG. 2B, the laminated coil substrate 202 is formed by laminating the coil substrates 22U, 22V, and 22W. By stacking, the coil CU in the first coil board 22U, the coil CV in the second coil board 22V, and the coil CW in the third coil board 22W partially overlap. The coils C in the coil boards 22U, 22V, and 22W are arranged so that the coils in the coil boards partially overlap each other.

By stacking the second coil substrate 22V on the first coil substrate 22U, as shown in FIG. 4C, the second coil substrate is placed on the first wiring group CU-51g of the coil CU of the first coil substrate 22U. The second wiring group CV-52g of the 22V coil CV is located. By stacking the third coil substrate 22W on the second coil substrate 22V, the second wiring group of the coil CW of the third coil substrate 22W is placed on the first wiring group CV-51g of the coil CV of the second coil substrate 22V. CW-52g is located. As shown in FIG. 4C, the coils in the coil boards 22U, 22V, and 22W are arranged so that the coils in the different coil boards overlap.
By stacking the second coil substrate 22V on the first coil substrate 22U, as shown in FIG. 4B, the second coil substrate is placed on the central space SC of one coil CU in the first coil substrate 22U. The wiring w of the coil C in 22V is located. Further, by stacking the third coil substrate 22W on the second coil substrate 22V, as shown in FIG. 4B, the third coil substrate 22U is placed on the central space SC of one coil CU in the first coil substrate 22U. The wiring w of the coil C in the coil substrate 22W is located. The first wiring group CV-51g of the coil CV of the second coil board 22V and the first wiring CW- of the coil CW of the third coil board 22W are placed on the central space CU-SC of one coil CU in the first coil board 22CU. 51g is located. The space factor of the coil can be increased.

By winding the laminated coil substrate 202, the coil substrate 20 for a motor shown in FIG. 1 (B) can be obtained. For example, the laminated coil substrate 202 is wound in a tubular shape. The motor coil substrate 20 is wound around the cavity AH. For example, the shape of the coil substrate 20 for a motor is a cylinder. The number of windings is 1 or more and 3 or less. FIG. 1B is a schematic diagram.

In FIG. 1C, the terminal T on the terminal board 24 of the motor coil board 20 is connected by the terminal connection 26. FIG. 1D shows another example of the coil substrate 20 for a motor. In another example of FIG. 1D, a terminal connection board 120 is attached to one end of the motor coil board 20.

As shown in FIG. 1A, the motor 10 can be obtained by arranging the magnet 48 in the coil substrate 20 for a motor. FIG. 1A is a schematic diagram. The motor coil substrate 20 is arranged around the magnet 48 via the cavity AH. An example of the motor 10 is a three-phase AC motor. The motor 10 can also have a housing.

FIG. 1B shows the rotation direction MR of the motor 10. When the motor coil substrate 20 is cut in a plane parallel to the rotation direction MR, the cross-sectional shape of the motor coil substrate 20 is substantially circular. The coils C in the coil substrates 22U, 22V, and 22W are arranged so that the angle between the rotation direction MR and the first wiring 51 is approximately 90 degrees.

The motor coil substrate 20 is arranged around the magnet 48 so that the angle between the rotation direction MR of the motor 10 and the direction of the current flowing through the first wiring 51 is substantially vertical. Therefore, the first wiring group 51g is arranged around the magnet 48 so that the angle between the rotation direction MR of the motor 10 and the first wiring 51 is substantially vertical. The second wiring group 52g is arranged around the magnet 48 so that the angle between the rotation direction MR of the motor 10 and the second wiring 52 is substantially vertical.

When the distance W1 and the distance W2 are substantially equal and the distance W0 is approximately twice the distance W1, the magnet 48 can be almost completely surrounded by the first wiring group 51g and the second wiring group 52g. It is possible to provide a motor 10 having high efficiency.

Each coil substrate 22U, 22V, 22W of the first embodiment has six coils. For example, six coils C can be arranged in a row. Then, in order to manufacture the laminated coil substrate, it is conceivable to fold the coil substrate between the adjacent coils C so that the coils C partially overlap each other. In that case, the number of times the coil substrate is folded is 5, and the number of times the coil substrate is folded is large.
In the first embodiment, each coil substrate has 6 coils. Each coil substrate has the same number of coils C.
According to the first embodiment, the coils C can be overlapped with high accuracy. It is possible to provide a laminated coil substrate 202 and a coil substrate 20 for a motor having high efficiency. Easy to manufacture.

[Application example of the first embodiment]
The three-phase motor and the coil substrate for the three-phase motor used in the three-phase motor are application examples of the first embodiment. A coil substrate and a laminated coil substrate for manufacturing a coil substrate for a three-phase motor are also application examples of the first embodiment.

[Coil board for manufacturing coil board for 3-phase motor]
FIG. 3A shows an example of a coil substrate (first application substrate) 203 for manufacturing a coil substrate for a three-phase motor. In these figures, the wirings w forming the coil C are grouped together. The first wiring group 51g and the second wiring group 52g are drawn. The arrows drawn in the wiring group indicate the direction of the current in the coil substrate 203. The direction of the current is observed from the position on the first surface F.

The coil substrates 22U, 22V, 22W of the first embodiment can be used for the coil substrate 203 of the application example. When the first coil substrate 22U of the first embodiment has a U-phase coil CU, the second coil substrate 22V has a V-phase coil CV, and the third coil substrate 22W has a W-phase coil CW, the first embodiment is performed. The coil substrates 22U, 22V, 22W of the embodiment can be used as a coil substrate for manufacturing a three-phase motor.

The coil substrates 22U, 22V, and 22W shown in FIG. 3A are stacked. The method of laminating the coil substrates 22U, 22V, and 22W is the same as the method of the first embodiment. A laminated coil substrate is manufactured. After that, the coil substrate for a three-phase motor is manufactured by winding the laminated coil substrate.

Similar to the first embodiment, the coil substrate 20 for a three-phase motor is arranged around the magnet 48. A three-phase motor is formed by a coil substrate 20 for a three-phase motor and a magnet 48. By using three-phase alternating current, the three-phase motor rotates. The first wiring 51 and the second wiring 52 forming the three-phase motor are substantially perpendicular to the rotation direction MR of the motor. When a current flows through the coil C forming the coil substrate for the three-phase motor, the direction of the current flowing through the first wiring 51 is substantially perpendicular to the rotation direction MR of the motor. The direction of the current flowing through the second wiring 52 is substantially perpendicular to the rotation direction MR of the motor. The first wiring group 51g and the second wiring group 52g can be referred to as vertical wiring groups. A group of vertical wires can surround the magnet 48 that forms the three-phase motor. It is possible to provide a coil substrate for a three-phase motor having a high space factor. It is possible to provide a three-phase motor having high efficiency.

[Second Embodiment]
FIG. 4A shows a coil substrate for forming the coil substrate for a motor according to the second embodiment.
As shown in FIG. 4A, two coil substrates 22U and 22V are prepared. The first coil substrate 22U and the second coil substrate 22V are formed of the flexible substrate 22 and the coil C on the flexible substrate 22. The first and second coil substrates 22U and 22V have one end 22L and the other end 22R on the opposite side to one end. A plurality of coil CUs of the first coil substrate 22U are arranged in order from one end 22L to the other end 22R. A plurality of coil CVs of the second coil substrate 22V are arranged in order from one end 22L to the other end 22R. A laminated coil substrate is formed by laminating the second coil substrate 22V on the first coil substrate 22U. At this time, the second coil substrate 22V is laminated on the first coil substrate 22U so that the coil CU of the first coil substrate 22U and the coil CV of the second coil substrate 22V partially overlap. By winding the laminated coil substrate into a cylindrical shape, the coil substrate 20 for a motor shown in FIG. 1 (B) is formed.

10: Motor 20: Motor coil substrate 22: Flexible substrate 22U, 22V, 22W Coil substrate 22L: One end 22R: Other end 48: Magnet 51: First wiring 51g: First wiring group 52: Second wiring 52g: Second Wiring group 201: Coil board 202: Laminated coil board C: Coil W0: Distance W1: Distance W2: Distance SC: Central space

Claims (15)

With the first flexible substrate
The coil formed on the first flexible substrate (coil on the first substrate) and
The first flexible substrate and the second flexible substrate laminated on the coil on the first substrate,
A laminated coil substrate composed of a coil formed on the second flexible substrate (coil on the second substrate).
The second flexible substrate is laminated on the first flexible substrate so that the coil on the first substrate and the coil on the second substrate partially overlap each other. The laminated coil substrate according to claim 1, wherein the first flexible substrate and the second flexible substrate have one end and the other end opposite to the one end, and the coil on the first substrate and the second substrate. There are a plurality of upper coils, and the coils on the plurality of first substrates are arranged in order from one end of the first flexible substrate toward the other end of the first flexible substrate, and the plurality of second coils are arranged in this order. The coils on the substrate are arranged in order from the one end of the second flexible substrate toward the other end of the second flexible substrate. The laminated coil substrate according to claim 2, further, a third flexible substrate laminated on the second flexible substrate and the coil on the second substrate, and a coil formed on the third flexible substrate (the third flexible substrate). The third flexible substrate has one end and the other end opposite to the one end, and the third flexible substrate has a plurality of coils on the third substrate, and the plurality of first ones. The coils on the three substrates are arranged in order from the one end of the third flexible substrate toward the other end of the third flexible substrate, and the coils on the second substrate and the coils on the third substrate are partially arranged. The third flexible substrate is laminated on the second flexible substrate so as to overlap with the second flexible substrate. The laminated coil substrate according to claim 3, wherein the coil is formed of a central space and wiring surrounding the central space, and the wiring is a plurality of first wirings and a plurality of second wirings facing each other through the central space. Of the first wiring and the second wiring that include the wiring and form the coil, the first wiring is close to one end, and each of the first wirings is formed substantially in parallel, and the second wiring is formed. Each of the wirings is formed substantially in parallel, the first wiring and the second wiring are formed substantially in parallel, the first wiring group is formed by the plurality of first wirings, and the plurality of second wirings are formed. A second wiring group is formed by wiring, the first wiring group has a distance W1, the second wiring group has a distance W2, and the central space is the first wiring group and the second wiring group. There is a distance W0 between the two, the distance W1 and the distance W2 are substantially equal, and the distance W0 is approximately twice the distance W1. The laminated coil substrate according to claim 4, wherein the first wiring of the coil on the second substrate and the first wiring of the coil on the third substrate are placed in the central space of the coil on the first substrate. The second wiring of the coil on the second substrate is located on the first wiring group of the coil on the first substrate, and the first wiring of the coil on the second substrate is located. The second wiring of the coil on the third substrate is located on the group. The laminated coil substrate according to claim 4, wherein the laminated coil substrate is a coil substrate for a three-phase motor. The coil substrate for a three-phase motor according to claim 6, all the coils on the first substrate are U-phase coils, and all the coils on the second substrate are V-phase coils. The coil on the third substrate is a W-phase coil. In the coil substrate for a three-phase motor according to claim 7, the direction of the current flowing through the coil on each of the first substrates is the same, and the direction of the current flowing through the coil on each of the second substrates is the same. The direction of the current flowing through the coil on the third substrate is the same, the direction of the current flowing through the coil on the first substrate is the same as the direction of the current flowing through the coil on the third substrate, and the direction is the same. The direction of the current flowing through the coil on the first substrate and the direction of the current flowing through the coil on the second substrate are opposite. The coil substrate for a three-phase motor according to claim 7, wherein the first wiring of the coil on the second substrate and the first wiring of the coil on the third substrate are placed on the central space of the coil on the first substrate. One wiring is located, the second wiring of the coil on the second substrate is located on the first wiring group of the coil on the first substrate, and the coil on the second substrate is said. The second wiring of the coil on the third substrate is located on the first wiring group. A coil substrate for a motor formed by winding the laminated coil substrate of claim 2. A coil substrate for a motor formed by winding the laminated coil substrate of claim 3. A coil substrate for a motor formed by winding the laminated coil substrate of claim 5. A coil substrate for a motor formed by winding the laminated coil substrate of claim 6. A coil substrate for a motor formed by winding a coil substrate for a three-phase motor according to claim 9. The coil substrate for a motor according to claim 11, further comprising a first input electrode, a first output electrode, a second input electrode, a second output electrode, a third input electrode, and a third output electrode. The coils on the first substrate are connected in series, the coils on the plurality of second substrates are connected in series, and the coils on the plurality of third substrates are connected in series. Each of the input electrodes is connected to the coil closest to the one end, and each of the output electrodes is connected to the coil closest to the other end.

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