Coil substrate, motor coil substrate, and motor
A coil substrate includes a flexible substrate, and coils formed on the flexible substrate such that each of the coils includes wirings formed on the first surface of the flexible substrate and wirings formed on the second surface of the flexible substrate. The coils include an N-th coil forming an N-th phase and an (N+1)-th coil formed adjacent to the N-th coil and forming an (N+1)-th phase different from the N-th phase, and each coil is formed such that an inter-wiring distance between the wirings forming the N-th coil and the wirings forming the (N+1)-th coil is larger than an inter-wiring distance between the wirings forming the N-th coil, and the inter-wiring distance between the wirings forming the N-th coil and the wirings forming the (N+1)-th coil is larger than an inter-wiring distance between the wirings forming the (N+1)-th coil.
1 . A coil substrate, comprising:
a flexible substrate having a first surface and a second surface on an opposite side with respect to the first surface; and
a plurality of coils formed on the flexible substrate such that each of the coils includes a plurality of wirings formed on the first surface of the flexible substrate and a plurality of wirings formed on the second surface of the flexible substrate,
wherein the plurality of coils includes an N-th coil forming an N-th phase and an (N+1)-th coil formed adjacent to the N-th coil and forming an (N+1)-th phase different from the N-th phase, and each of the coils is formed such that an inter-wiring distance between the wirings forming the N-th coil and the wirings forming the (N+1)-th coil is larger than an inter-wiring distance between the wirings forming the N-th coil, that the inter-wiring distance between the wirings forming the N-th coil and the wirings forming the (N+1)-th coil is larger than an inter-wiring distance between the wirings forming the (N+1)-th coil and that the inter-wiring distance between the wirings forming the N-th coil and the wirings forming the (N+1)-th coil on the first surface of the flexible substrate is larger than the inter-wiring distance between the wirings forming the N-th coil and the wirings forming the (N+1)-th coil on the second surface of the flexible substrate.
2 . The coil substrate according to claim 1 , wherein the plurality of coils is formed such that each of the coils includes a half-turn wiring formed on the first surface of the flexible substrate, a half-turn wiring formed on the second surface of the flexible substrate, and a via conductor penetrating through the flexible substrate and connecting the half-turn wiring on the first surface of the flexible substrate and the half-turn wiring on the second surface of the flexible substrate.
3 . A motor coil substrate, comprising:
the coil substrate of claim 2 wound into a cylindrical shape such that the first surface of the flexible substrate is positioned on an inner peripheral side of the cylindrical shape and that the second surface of the flexible substrate is positioned on an outer peripheral side of the cylindrical shape.
4 . A motor, comprising:
a cylindrical yoke;
the motor coil substrate of claim 3 positioned on an inner side of the cylindrical yoke;
a rotation shaft positioned on an inner side of the motor coil substrate; and
a magnet fixed on the rotation shaft on the inner side of the motor coil substrate.
5 . The coil substrate according to claim 2 , wherein the flexible substrate includes an insulating resin substrate having a rectangular shape such that the coils are formed along a long side of the rectangular shape of the insulating resin substrate.
6 . The coil substrate according to claim 5 , wherein the plurality of coils includes a coil configured to form a U phase, a coil configured to form a V phase, and a coil configured to form a W phase such that the plurality of coils is configured to form a coil substrate for a three-phase motor.
7 . The coil substrate according to claim 2 , wherein the plurality of coils includes a coil configured to form a U phase, a coil configured to form a V phase, and a coil configured to form a W phase such that the plurality of coils is configured to form a coil substrate for a three-phase motor.
8 . A motor coil substrate, comprising:
the coil substrate of claim 1 wound into a cylindrical shape such that the first surface of the flexible substrate is positioned on an inner peripheral side of the cylindrical shape and that the second surface of the flexible substrate is positioned on an outer peripheral side of the cylindrical shape.
9 . A motor, comprising:
a cylindrical yoke;
the motor coil substrate of claim 8 positioned on an inner side of the cylindrical yoke;
a rotation shaft positioned on an inner side of the motor coil substrate; and
a magnet fixed on the rotation shaft on the inner side of the motor coil substrate.
10 . The coil substrate according to claim 1 , wherein the flexible substrate includes an insulating resin substrate having a rectangular shape such that the coils are formed along a long side of the rectangular shape of the insulating resin substrate.
11 . The coil substrate according to claim 10 , wherein the plurality of coils includes a coil configured to form a U phase, a coil configured to form a V phase, and a coil configured to form a W phase such that the plurality of coils is configured to form a coil substrate for a three-phase motor.
12 . A motor coil substrate, comprising:
the coil substrate of claim 10 wound into a cylindrical shape such that the first surface of the flexible substrate is positioned on an inner peripheral side of the cylindrical shape and that the second surface of the flexible substrate is positioned on an outer peripheral side of the cylindrical shape.
13 . A motor, comprising:
a cylindrical yoke;
the motor coil substrate of claim 12 positioned on an inner side of the cylindrical yoke;
a rotation shaft positioned on an inner side of the motor coil substrate; and
a magnet fixed on the rotation shaft on the inner side of the motor coil substrate.
14 . The coil substrate according to claim 1 , wherein the plurality of coils includes a coil configured to form a U phase, a coil configured to form a V phase, and a coil configured to form a W phase such that the plurality of coils is configured to form a coil substrate for a three-phase motor.
15 . The coil substrate according to claim 1 , wherein the plurality of coils is formed on the flexible substrate such that the plurality of wirings formed on the first surface of the flexible substrate for one coil includes portions overlapping portions of the plurality of wirings formed on the second surface of the flexible substrate for another coil.
16 . The coil substrate according to claim 1 , wherein the plurality of coils is formed on the flexible substrate such that the wirings formed on the first surface of the flexible substrate are overlapping the wirings formed on the second surface of the flexible substrate through the flexible substrate.
17 . The coil substrate according to claim 1 , wherein the plurality of coils is formed on the flexible substrate such that the inter-wiring distance between the wirings forming the N-th coil on the first surface of the flexible substrate is larger than the inter-wiring distance between the wirings forming the N-th coil on the second surface of the flexible substrate and that the inter-wiring distance between the wirings forming the (N+1)-th coil on the first surface of the flexible substrate is larger than the inter-wiring distance between the wirings forming the (N+1)-th coil on the second surface of the flexible substrate.
18 . The coil substrate according to claim 1 , wherein the flexible substrate is configured to be wound into a cylindrical shape such that the first surface of the flexible substrate is positioned on an inner peripheral side of the cylindrical shape and that the second surface of the flexible substrate is positioned on an outer peripheral side of the cylindrical shape.
19 . The coil substrate according to claim 1 , wherein the flexible substrate has a rectangular shape and is configured to be wound in a direction of a long side of the rectangular shape with respect to an axis extending along a short side of the rectangular shape and to be formed into a cylindrical shape such that the first surface of the flexible substrate is positioned on an inner peripheral side of the cylindrical shape and that the second surface of the flexible substrate is positioned on an outer peripheral side of the cylindrical shape.
20 . The coil substrate according to claim 1 , wherein the flexible substrate is configured to be wound into a cylindrical shape such that the first surface of the flexible substrate is positioned on an inner peripheral side of the cylindrical shape and that the second surface of the flexible substrate is positioned on an outer peripheral side of the cylindrical shape, and each of the coils is formed on the flexible substrate such that when the flexible substrate is wound, a distance between top portions of the wirings formed on the inner peripheral side is substantially equal to a distance between bottom portions of the wirings formed on the outer peripheral side.