JP5889155B2 - Magnetizing apparatus and magnetizing method - Google Patents

Description

  The present invention relates to a magnetizing apparatus and a magnetizing device for magnetizing a plurality of unmagnetized magnet pieces arranged in a row on or on the iron core of a rotor of a rotating electric machine and on the base (iron core) of a stator of a linear motor. Regarding the method.

  Conventionally, a plurality of magnetic pole permanent magnet pieces and a magnetizing head for passing a pulse current, the circumferential width of which is larger than the circumferential width of the magnetic pole permanent magnet pieces are the same as the number of magnetic pole permanent magnet pieces. In a magnetizing apparatus for magnetizing a permanent magnet piece for magnetic pole including a magnetic head and a cylindrical rotating machine yoke for fixing the permanent magnet piece for magnetic pole, the magnetized head is at a predetermined angle with respect to the permanent magnet piece. A permanent magnet piece magnetizing device for magnetic poles of a rotating machine including a magnetizing head rotating means that can be rotated is disclosed (for example, see Patent Document 1).

  A yoke body having a rotor insertion hole portion into which a rotor having a rotor magnet material provided on an outer peripheral portion thereof is inserted; and a yoke body which is provided in the yoke body and generates a predetermined magnetizing magnetic field in the rotor insertion hole portion. Magnetic field action means, and magnetizing the rotor magnet material arranged in the magnetized magnetic field by inserting the rotor into the rotor insertion hole and generating the magnetized magnetic field. In the rotor magnet material magnetizing apparatus that is a permanent magnet, the rotor insertion hole is provided so as to be interposed between the rotor magnet material on the outer periphery of the rotor to be inserted into the yoke body. Including a yoke piece having a circumferential width larger than the circumferential width of the rotor magnet material and the same number as the number of the rotor magnet material for forming a magnetic flux path guided from the yoke body to the rotor magnet material; The yoke piece A rotor having a plurality of types of outer diameters is provided by adjusting the outer diameter of the rotor into which the inner diameter surface is inserted and applying a magnetizing magnetic field to the rotor magnet material via the yoke piece. Discloses a rotor magnet material magnetizing apparatus (see, for example, Patent Document 2).

  Also, a magnetizing device for magnetizing a sensor magnet for detecting a rotational position provided integrally with the rotor of the motor, wherein a plurality of sensor magnets held at predetermined positions of the rotor can be magnetized. A plurality of magnetizing coils arranged on the magnet, a plurality of iron cores coaxially arranged on each of the plurality of magnetizing coils, and a control for individually flowing a magnetizing current through the magnetizing coil. A magnetizing apparatus having coil energization control means and iron core insertion / extraction means for axially inserting / removing an iron core corresponding to a pole that is not required when magnetizing less than a plurality of poles with respect to the magnetizing coil Is disclosed (for example, see Patent Document 3).

JP 2002-75733 A JP 09-168259 A JP 2010-21463 A

  However, according to the conventional technique described in Patent Document 1, the circumferential width of the magnetizing head is larger than the circumferential width of the magnet piece, and the magnetic flux line circulates small between adjacent magnetizing heads. For this reason, in a rotor in which the distance between the poles of the magnet pieces is narrow, there is a problem that the magnetic flux lines do not face the direction of easy magnetization at the end of the magnet piece, and if the angle is too large, a reverse magnetic field is generated in the adjacent magnet piece. In addition, there is a problem that rotors having different outer diameters, magnet pieces, and pole numbers cannot be magnetized.

  Further, according to the conventional technique described in Patent Document 2, it is possible to magnetize a rotor magnet material provided in a rotor of a plurality of types of outer diameters with one rotor magnet material magnetizing device. Since the yoke piece has a circumferential width larger than the circumferential width of the rotor magnet material and is the same as the number of the rotor magnet materials, the rotor magnet material next to the rotor magnet material is narrow in the rotor between the poles of the rotor magnet material. There is a problem that a reverse magnetic field is generated, and there is a problem that the rotor magnet materials of a plurality of types of rotors having different numbers of poles cannot be magnetized.

  Further, according to the conventional technique described in Patent Document 3, it is possible to magnetize sensor magnets having different numbers of poles with one magnetizing device. It can be used only for sensor magnets with a specific number of poles, such as 4 poles or 2 poles, which are magnetized using an iron core, and the iron core corresponding to the poles that are not required at the time of 2 pole magnetization is removed from the magnetizing coil. There's a problem.

  The present invention has been made in view of the above, and can suppress the influence of a reverse magnetic field on an adjacent magnet piece, and can be a rotor or linear of a rotating electrical machine having different outer diameters, shapes of magnet pieces, and the number of poles. It is an object of the present invention to obtain a magnetizing device and a magnetizing method that can magnetize magnet pieces of a stator of a motor.

  In order to solve the above-mentioned problems and achieve the object, a plurality of unmagnetized magnet pieces arranged in a row in or on the iron core are attached so that the polarities of the outer surfaces of adjacent magnet pieces are different from each other. In the magnetizing apparatus for magnetizing, a first coil is wound, a first yoke having a first magnetizing head having a column width smaller than the column width of the magnet piece, a second coil is wound, and the first coil is wound. When one magnetized head is positioned so as to face the front side in the row direction of the predetermined magnet piece, it is located so as to face the front side in the row direction or the rear side in the row direction of the odd number of magnet pieces spaced from the predetermined magnet piece. A second yoke having a second magnetizing head that is positioned in such a manner that the width in the row direction is smaller than the width in the row direction of the magnet pieces, and a third yoke that magnetically connects the first yoke and the second yoke. And the first coil and the second coil are the first and second coils. The magnetic flux lines emitted from the first magnetizing head of the first yoke by energization of the first yoke → the iron core → the odd-numbered magnet pieces → the second yoke having the second magnetizing head → the above It is wound around the third yoke → the first yoke in this order.

  According to the present invention, it is possible to suppress the influence of the reverse magnetic field on the adjacent magnet piece, and to attach to the magnet piece of the rotor of the rotating electric machine or the stator of the linear motor having different outer diameter, shape of the magnet piece and the number of poles. A magnetizing apparatus and a magnetizing method capable of magnetizing are obtained.

1-1 is a front view showing Embodiment 1 of a magnetizing apparatus according to the present invention. FIG. 1-2 is a front view showing a state in which the magnetizing head of the magnetizing apparatus according to the first embodiment is separated from the magnet pieces and the magnetizing head and the magnet pieces are relatively moved in the row direction of the magnet pieces. FIG. 1-3 is a front view showing a state in which the magnetizing head of the magnetizing apparatus of Embodiment 1 is brought close to a magnet piece. FIG. FIG. 2-1 is a front view showing Embodiment 2 of the magnetizing apparatus according to the present invention. FIG. 2-2 is a front view illustrating a state in which the magnetizing head of the magnetizing apparatus according to the second embodiment is separated from the magnet pieces and the magnetizing head and the magnet pieces are relatively moved in the column direction of the magnet pieces. FIG. 2-3 is a front view showing a state in which the magnetizing head of the magnetizing apparatus according to the second embodiment is brought close to a magnet piece. FIG. 3-1 is a front view showing Embodiment 3 of the magnetizing apparatus according to the present invention. FIG. 3-2 is a front view illustrating a state in which the magnetizing head of the magnetizing apparatus according to the third embodiment is separated from the magnet pieces and the magnetized head and the magnet pieces are relatively moved in the row direction of the magnet pieces. FIG. 3-3 is a front view showing a state in which the magnetizing head of the magnetizing apparatus according to the third embodiment is brought close to a magnet piece. FIG. 4-1 is a perspective view showing Embodiment 4 of the magnetizing apparatus according to the present invention. FIG. 4-2 is a perspective view illustrating a state in which the magnetizing device of Embodiment 4 and the magnet pieces are relatively moved in the direction perpendicular to the rows of the magnet pieces. FIG. 5-1 is a partial front view showing Embodiment 5 of the magnetizing apparatus according to the present invention. FIG. 5-2 is a partial front view showing a state where the rotor is different from the rotor shown in FIG. 5A in the magnetizing apparatus of the fifth embodiment. FIG. 6-1 is a front view showing Embodiment 7 of the magnetizing apparatus according to the present invention. FIG. 6-2 is a front view showing a state in which the magnetizing device of Embodiment 7 and the magnet pieces are relatively moved by one pole in the row direction of the magnet pieces. FIG. 6-3 is a front view illustrating a state in which the magnetizing device and the magnet piece according to the seventh embodiment are further moved relative to each other in the column direction of the magnet piece by one pole. FIG. 7-1 is a front view showing Embodiment 8 of the magnetizing apparatus according to the present invention. FIG. 7-2 is a front view showing a state in which the magnetizing device and the magnet piece according to the eighth embodiment are relatively moved by two poles in the row direction of the magnet piece. FIG. 7-3 is a front view showing a state in which the magnetizing device and the magnet piece of the eighth embodiment are further moved relative to each other in the column direction of the magnet piece by two poles. FIG. 7-4 is a front view showing a state in which the magnetizing device and the magnet piece according to the eighth embodiment are further moved relative to each other by two poles in the row direction of the magnet piece. FIG. 8-1 is a perspective view showing Embodiment 9 of the magnetizing apparatus according to the present invention. FIG. FIG. 8-2 is a perspective view illustrating a state in which the magnetizing device of Embodiment 9 and the magnet pieces are relatively moved in the direction perpendicular to the row of the magnet pieces.

  Hereinafter, embodiments of a magnetizing apparatus and a magnetizing method according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1-1 is a front view showing a first embodiment of a magnetizing apparatus according to the present invention, and FIG. 1-2 shows a magnetizing head of the magnetizing apparatus according to the first embodiment separated from a magnet piece. It is a front view which shows the state which moved the magnetic head and the magnet piece relatively to the row direction of a magnet piece, and FIGS. 1-3 has made the magnetizing head of the magnetizing apparatus of Embodiment 1 adjoin to the magnet piece. It is a front view which shows a state.

  As illustrated in FIG. 1A, the magnetizing apparatus 10 according to the first embodiment includes six magnets embedded in the outer periphery of the iron core 112 of the six-pole rotor 110 of the rotating electric machine and arranged in a row in the circumferential direction of the iron core 112. The flat magnetized magnet piece 111 is magnetized. The magnet pieces 111 are magnetized so that the polarities of the outer surfaces of adjacent magnet pieces 111 are different from each other.

  The pole pitch (angle: the same applies hereinafter) α of the magnet pieces 111 is 60 °. The six-pole rotor 110 is held so as to be rotatable about an axis, and is rotated by a predetermined angle in order to divide and magnetize the magnet piece 111. Instead of rotating the hexapole rotor 110, the magnetizing device 10 may be rotated around the axis. That is, the hexapole rotor 110 and the magnetizing device 10 may be relatively rotated (moved).

  The magnetizing apparatus 10 includes a third yoke 13 having an outer shape of a rectangular thick plate, and first and second yokes 11 and 12 having an L-shaped thick plate shape. One side of the first and second yokes 11 and 12 constitutes the first and second magnetized heads 11a and 12a. The slot pitch (angle: the same applies hereinafter) β between the first and second magnetizing heads 11a and 12a is 180 °, and the end surfaces of the first and second magnetizing heads 11a and 12a are opposed to each other. Yes.

  The second magnetizing head 12a is opposed to the magnet pieces 111 that are separated by three (odd number) from the magnet pieces 111 that the first magnetizing head 11a faces. The circumferential width (column width) H of the first and second magnetizing heads 11a and 12a is smaller than the circumferential width (column width) K of the magnet piece 111 (about ½).

  First and second coils 11b and 12b are wound around the first and second magnetized heads 11a and 12a, respectively. The first and second coils 11b and 12b are arranged so that the polarity of the outer surface of the magnet piece 111 to be magnetized is, for example, one N pole and the other S pole. The second coil is wound clockwise when viewed from the end face side of the second magnetized head 12a, as viewed from the end face side of the magnetic head 11a. The first and second coils 11 b and 12 b are connected in series, and a large pulse current flows to magnetize the magnet piece 111.

  The other sides of the first and second yokes 11 and 12 constitute first and second leg portions 11c and 12c, and the first and second leg portions 11c and 12c are the upper and lower portions of the third yoke 13, respectively. The third yoke 13 is slidably engaged (contacted) in the vertical direction (the direction in which the first and second magnetized heads 11 a and 12 a are separated from the magnet piece 111), and the third yoke 13 is connected to the first and second yokes 11. , 12 are magnetically connected.

  Next, a method of magnetizing the magnet piece 111 of the six-pole rotor 110 by the magnetizing apparatus 10 of the first embodiment will be described. First, as shown in FIG. 1-1, in the first step, the first and second magnetizing heads 11a and 12a are provided with a part of the magnet piece 111 (clockwise front side of the magnet piece 111: front side in the column direction). A magnetic field is generated so that the outer surface of S is poled at the S pole and the outer surface of part b (the clockwise front side of the magnet piece 111 separated in three counterclockwise directions: the front side in the column direction) is magnetized at the N pole. .

  At this time, the magnetic flux lines J generated from the first magnetizing head 11a of the first yoke 11 are the magnet piece 111 → the iron core 112 → the magnet pieces 111 separated by three → the second yoke 12 having the second magnetizing head 12a. → Third yoke 13 → Turns in the order of first yoke 11 and magnetizes the front side in the row direction of the two magnet pieces 111.

  Next, as shown in FIG. 1-2, in the second step, the first and second yokes 11 and 12 are moved up and down to move the first and second magnetized heads 11a and 12a to 6 poles. The first and second magnetizing heads 11a and 12a are moved away from the magnet piece 111 of the rotor 110, the six-pole rotor 110 is rotated in the clockwise direction, and the magnet piece 111 is relatively moved in the column direction. The magnet part 111 is opposed to the c part (clockwise rear side of the magnet piece 111: rear side in the row direction) and the d part (clockwise rear side of the magnet piece 111: rear side in the row direction).

  Next, as shown in FIG. 1C, in the third step, the first and second yokes 11 and 12 are moved downward and upward to move the first and second magnetized heads 11a and 12a to 6 poles. Close to the rotor 110, the first and second magnetizing heads 11 a, 12 a have an outer surface of the c part of the magnet piece 111 (the rear side in the clockwise direction of the magnet piece 111) as an S pole and a d part (magnet piece 111). The magnetic field is generated so that the outer surface of the rear side in the clockwise direction is magnetized to the N pole. Also at this time, the magnetic flux lines J circulate as in the first step.

  The magnetizing step similar to the first to third steps described above is performed on the other two pairs of non-magnetized magnet pieces 111 facing each other, and the polarities of the outer surfaces of the adjacent magnet pieces 111 are different. Magnetize like so. The rotor (rotor) to be magnetized may be an inner rotor or an outer rotor. As the material of the magnet piece, alnico, ferrite, cobalt, neodymium or the like can be used, and the shape of the magnet piece may be a rectangle, an ellipse, a fan, a trapezoid, a kamaboko, or the like.

  The slot pitch β (see FIG. 1-1) between the first and second magnetizing heads 11a and 12a is larger than the pole pitch α of the magnet piece 111, and the circumferential width of the first and second magnetizing heads 11a and 12a. (Column width) H is smaller than the circumferential width (column width) K of the magnet piece 111.

  In the magnetizing apparatus 10 of the first embodiment described above, the slot pitch β between the first and second magnetizing heads 11a and 12a is made larger than the pole pitch α of the magnet pieces 111, and the first and second magnetizing devices are used. Since the circumferential width (row width) H of the heads 11a, 12a is smaller than the circumferential width (row width) K of the magnet piece 111, the insulation of the first and second coils 11b, 12b and cooling are performed. The space of the magnetizing device 10 can be increased and the durability of the magnetizing device 10 can be increased.

  The first and second coils 11b and 12b are arranged so that the polarity of the outer surface of the magnet piece 111 to be magnetized is, for example, one N pole and the other S pole. When viewed from the end face side of the magnetic head 11a, the second coil is wound clockwise when viewed from the end face side of the second magnetized head 12a, and the direction of the magnetic flux lines J is aligned. It is strong and the magnetization efficiency of the magnet piece 111 is high.

  As shown in the first embodiment, when the number of poles of the rotor is 2 + 4N (N = 0, 1, 2,...) Poles, the polarities of the outer surfaces of the magnet pieces 111 arranged facing each other are: One is the N pole and the other is the S pole. Therefore, if the slot pitch β between the first and second magnetizing heads 11a and 12a is 180 °, the rotor is magnetized with different numbers of 2 + 4N (N = 0, 1, 2,...) Poles. The work can be performed with the same magnetizing device 10.

  Further, since the first and second yokes 11 and 12 move in the radial direction around the position of the rotor, the magnetizing operation of the rotors having different outer diameters can be performed by the same magnetizing apparatus 10. it can. That is, the magnetizing apparatus 10 can be shared by the magnetizing operation of the rotors having different numbers of poles and different outer diameters. Further, since the circumferential width (column width) of the magnetizing head is smaller than the circumferential width (column width) of the magnet pieces and the magnet pieces are divided and magnetized, the reverse magnetic field to the adjacent magnet piece is reduced.

Embodiment 2. FIG.
FIG. 2-1 is a front view showing Embodiment 2 of the magnetizing apparatus according to the present invention, and FIG. 2-2 shows that the magnetizing head of the magnetizing apparatus of Embodiment 2 is separated from the magnet piece and attached. It is a front view which shows the state which moved the magnetic head and the magnet piece relatively to the row direction of a magnet piece, and FIGS. 2-3 has made the magnetizing head of the magnetizing apparatus of Embodiment 2 approach the magnet piece. It is a front view which shows a state.

  As illustrated in FIG. 2A, the magnetizing device 20 according to the second embodiment includes eight pieces of magnets embedded in the outer peripheral portion of the iron core 122 of the eight-pole rotor 120 of the rotating electric machine and arranged in a row in the circumferential direction of the iron core 122. The flat magnetized magnet piece 121 is magnetized. The magnet pieces 121 are magnetized so that the polarities of the outer surfaces of adjacent magnet pieces 121 are different from each other.

  The pole pitch α (see FIG. 2-2) of the magnet pieces 121 is 45 °. The 8-pole rotor 120 is held so as to be rotatable about an axis, and is rotated by a predetermined angle in order to divide and magnetize the magnet piece 121. Instead of rotating the octupole rotor 120, the magnetizing device 20 may be rotated around the axis.

  The magnetizing device 20 includes a third yoke 23 having a rectangular thick plate shape and first and second yokes 21 and 22 having L-shaped thick plate shapes. One side of the first and second yokes 21 and 22 constitutes first and second magnetizing heads 21a and 22a. The slot pitch β between the first and second magnetizing heads 21a and 22a is 140 °. The second magnetizing head 22a is opposed to the magnet pieces 121 which are separated from the magnet pieces 121 opposed to the first magnetizing head 21a by three (odd number). The circumferential width (column width) H of the first and second magnetizing heads 21 a and 22 a is smaller than the circumferential width (column width) K of the magnet piece 121.

  First and second coils 21b and 22b are wound around the first and second magnetizing heads 21a and 22a, respectively. The first and second coils 21b and 22b are arranged such that, for example, the polarity of the outer surface of the magnet piece 121 to be magnetized is one N pole and the other S pole. When viewed from the end face side of the magnetic head 21a, the second coil is wound clockwise when viewed from the end face side of the second magnetized head 22a. The first and second coils 21b and 22b are connected in series, and a large pulse current flows to magnetize the magnet piece 121.

  The other sides of the first and second yokes 21 and 22 constitute first and second leg portions 21c and 22c, and the first and second leg portions 21c and 22c are the upper and lower portions of the third yoke 23, respectively. The third yoke 23 magnetically connects the first and second yokes 21 and 22 to each other. Although a gap is generated in the portion e between the third yoke 23 and the second yoke 22, there is no large loss that weakens the magnetization.

  Next, a method of magnetizing the magnet piece 121 of the octupole rotor 120 by the magnetizing apparatus 20 of the second embodiment will be described. First, as shown in FIG. 2A, in the first step, the first and second magnetizing heads 21a and 22a are provided with the f portion of the magnet piece 121 (clockwise front side of the magnet piece 121: front side in the column direction). Magnetic field is generated so that the outer surface of the S pole is the south pole and the outer surface of the g section (clockwise rear side of the magnet piece 121 separated in three counterclockwise: the rear side in the column direction) is magnetized to the north pole. Let

  At this time, the magnetic flux lines J generated from the first magnetizing head 21a of the first yoke 21 are magnet pieces 121 → inside the iron core 122 → three separated magnet pieces 121 → second yoke having the second magnetizing head 22a. It circulates in the order of 22 → the third yoke 23 → the first yoke 21 and magnetizes the front side in the row direction and the rear side in the row direction of the two magnet pieces 121, respectively.

  Next, as shown in FIG. 2B, in the second step, the first and second magnets 21 and 22 are moved radially outward of the octupole rotor 120 to produce the first and second magnetizations. The heads 21a and 22a are separated from the magnet piece 121 of the 8-pole rotor 120, the 8-pole rotor 120 is rotated clockwise by 1213 magnet pieces, and the magnet pieces 121 are relatively moved in the column direction. 1 and 2 magnetizing heads 21a and 22a are separated into three parts: h part of magnet piece 121 (clockwise front side of magnet piece 121: front side in row direction) and i part (three pieces counterclockwise). (Clockwise rear side: rear side in the row direction).

  Next, as shown in FIG. 2C, in the third step, the first and second magnets 21 and 22 are moved inward in the radial direction of the octupole rotor 120 to perform first and second magnetization. The heads 21a and 22a are brought close to the 8-pole rotor 120, and the direction of the magnetizing current is switched by interposing a thyristor or a contactor between the magnetizing power source and the first and second coils 21b and 22b. A magnet in which the outer surface of the h portion of the magnet piece 121 (the clockwise front side of the magnet piece 121: the front side in the column direction) is N-pole and the i portion (counterclockwise three pieces) is separated from the second magnetizing heads 21a and 22a. A magnetic field is generated so that the outer surface of the piece 121 in the clockwise direction rear side (the rear side in the column direction) is magnetized to the S pole. At this time, the magnetic flux lines J circulate counterclockwise, contrary to the first step.

  The second to third magnetizing steps described above are repeated to magnetize the magnet pieces 121 facing each other as a pair of non-magnetized magnets. Magnetize differently. The magnetizing device 20 and the magnetizing method of the second embodiment described above have the same effects as the magnetizing device 10 and the magnetizing method of the first embodiment.

Embodiment 3 FIG.
FIG. 3-1 is a front view showing Embodiment 3 of the magnetizing apparatus according to the present invention, and FIG. 3-2 shows that the magnetizing head of the magnetizing apparatus of Embodiment 3 is separated from the magnet piece and attached. FIG. 3-3 is a front view showing a state in which the magnetic head and the magnet piece are relatively moved in the row direction of the magnet piece, and FIG. 3-3 is a diagram in which the magnetizing head of the magnetizing apparatus according to the third embodiment is brought close to the magnet piece. It is a front view which shows a state.

  As shown in FIG. 3A, the magnetizing device 30 according to the third embodiment includes four pieces arranged in a row in the circumferential direction of the iron core 132 by being bonded to the outer circumference of the iron core 132 of the four-pole rotor 130 of the rotating electric machine. The curved plate-like unmagnetized magnet piece 131 is magnetized. The magnet pieces 131 are magnetized so that the polarities of the outer surfaces of adjacent magnet pieces 131 are different from each other.

  The pole pitch α of the magnet pieces 131 is 90 °. The quadrupole rotor 130 is held so as to be rotatable about an axis, and is rotated by 90 ° in order to divide and magnetize the magnet piece 131. Instead of rotating the quadrupole rotor 130, the magnetizing device 30 may be rotated around the axis.

  The magnetizing device 30 includes a third yoke 33 having an outer shape of a rectangular thick plate, and first and second yokes 31 and 32 having an L-shaped thick plate shape. One side of the first and second yokes 31 and 32 constitutes first and second magnetizing heads 31a and 32a. The slot pitch β between the first and second magnetizing heads 31a and 32a is 95 °, and the second magnetizing head 32a is one piece from the magnet piece 131 facing the first magnetizing head 31a. (Odd number) The magnet pieces 131 are opposed to each other. The circumferential width (column width) H of the first and second magnetizing heads 31 a and 32 a is smaller than the circumferential width (column width) K of the magnet piece 131.

  First and second coils 31b and 32b are wound around the first and second magnetized heads 31a and 32a, respectively. The first and second coils 31b and 32b are arranged such that the polarity of the outer surface of the magnet piece 131 to be magnetized is S pole on one side and N pole on the other side. When viewed from the end face side of the magnetic head 31a, the second coil 32b is wound clockwise when viewed from the end face side of the second magnetized head 32a. The first and second coils 31 b and 32 b are connected in series, and a large pulse current flows to magnetize the magnet piece 131.

  The other sides of the first and second yokes 31 and 32 constitute first and second leg portions 31c and 32c. The first and second leg portions 31c and 32c are respectively connected to the lower side surface of the third yoke 33. The first and second magnetizing heads 31a and 32a are slidable in a direction away from the magnet piece 131 in contact with the lower end surface, and the third yoke 33 magnetically moves the first and second yokes 31 and 32. Are connected. Although only a part of the lower end surface of the third yoke 33 and the upper end surface of the second leg portion 32c of the second yoke 32 are in contact with each other, a large loss that weakens the magnetization does not occur.

  Next, a method of magnetizing the magnet piece 131 of the quadrupole rotor 130 by the magnetizing apparatus 30 of the third embodiment will be described. First, as shown in FIG. 3A, in the first step, the first and second magnetizing heads 31a and 32a are provided with the j portion of the magnet piece 131 (the clockwise front side of the magnet piece 131: the front side in the column direction). The magnetic field is generated so that the outer surface of the magnetic pole is magnetized to the south pole, and the outer surface of the k portion (clockwise rear side of the magnet piece 131 separated by one: the rear side in the column direction) is magnetized to the north pole.

  At this time, the magnetic flux lines J generated from the first magnetizing head 31a of the first yoke 31 are magnet pieces 131 → inside the iron core 132 → one separated magnet piece 131 → second yoke having the second magnetizing head 32a. It goes around in the order of 32 → third yoke 33 → first yoke 31 and magnetizes the front side in the row direction and the rear side in the row direction of the two magnet pieces 131.

  Next, as shown in FIG. 3B, in the second step, the first and second magnets 31 and 32 are moved radially outward of the quadrupole rotor 130 to perform first and second magnetization. The heads 31a and 32a are separated from the magnet piece 131, the quadrupole rotor 130 is rotated 90 ° in the clockwise direction, and the magnet piece 131 is relatively moved in the column direction, whereby the first and second magnetized heads 31a and 32a are moved. 1 part of the magnet piece 131 (clockwise front side of the magnet piece 131: the front side in the row direction), m part (clockwise direction rear side of the magnet piece 131 separated in the counterclockwise direction by one piece): the row direction Opposite the rear side.

  Next, as shown in FIG. 3C, in the third step, the first and second magnets 31 and 32 are moved inward in the radial direction of the quadrupole rotor 130 to perform first and second magnetization. The heads 31a and 32a are brought close to the magnet piece 131, and the direction of the magnetizing current is switched by interposing a thyristor or a contactor between the magnetizing power source and the first and second coils 31b and 32b. Magnet pieces 31a and 32a have magnet pieces 131 with the outer surface of part l (clockwise front side of magnet piece 131: front side in the column direction) separated by N poles and m part (one counterclockwise direction). A magnetic field is generated so that the outer surface of 131 in the clockwise direction (the rear in the column direction) is magnetized to the south pole. At this time, the magnetic flux lines J circulate in the opposite direction to the first step.

  The second to third steps described above are repeated to magnetize other unmagnetized magnet pieces 131, and magnetize so that the polarities of the outer surfaces of adjacent magnet pieces 131 are different. As with the 8-pole rotor 120 of the second embodiment, when the number of poles of the rotor is 4N (N = 1, 2, 3,...) The polarity of the side surface is the same polarity.

  If the polarities of the outer surfaces of the magnet pieces 131 arranged opposite to each other are magnetized to the same polarity, the generated magnetic fields cancel each other at the center of the rotor 130 and the magnetic field generated in the magnet pieces 131 is reduced. The slot pitch β between the magnetizing heads 31a and 32a is shifted from the 180 ° angle by one pole.

  Accordingly, when the 4N (N = 1, 2, 3,...) Pole magnetizing device 30 is shared, the slot pitch β between the first and second magnetizing heads 31a and 32a is set to 90 ° to By rotating the rotor by a predetermined angle in accordance with the number of poles, the magnetizing operation of the rotor with the different number of poles of the rotor can be performed by the same magnetizing device 30.

  The magnetizing device 30 and the magnetizing method of the third embodiment described above have the same effects as the magnetizing device 10 and the magnetizing method of the first embodiment.

Embodiment 4 FIG.
FIG. 4-1 is a perspective view showing Embodiment 4 of the magnetizing apparatus according to the present invention, and FIG. 4-2 shows the magnetizing apparatus and magnet pieces according to Embodiment 4 in the direction perpendicular to the row of magnet pieces. It is a perspective view which shows the state moved to relative to.

  As shown in FIG. 4A, the magnetizing device 40 according to the fourth embodiment includes six magnets embedded in the outer periphery of the iron core of the same six-pole rotor 110 as in the first embodiment and arranged in a row in the circumferential direction of the iron core. The plate-shaped unmagnetized magnet piece 111 is magnetized. The magnet pieces 111 are magnetized so that the polarities of the outer surfaces of adjacent magnet pieces 111 are different from each other. The magnetizing device 40 includes a third yoke 43 having an outer shape of a rectangular thick plate, first and second yokes 41 and 42 having an L-shaped thick plate shape, and first and second first and second yokes 41 and 42. The first and second coils 41b and 42b are wound around the two magnetized heads 41a and 42a.

The shapes of the first, second, and third yokes 41, 42, and 43, the first and second magnetization heads 41a and 42a, and the first and second coils 41b and 42b of the magnetizing device 40 of the fourth embodiment are as follows. Although it is similar to the magnetizing device 10 of the first embodiment, the magnet piece 111 has a length in a direction perpendicular to the column direction of the magnet pieces 111 of the first and second magnetizing heads 11a and 12a of the magnetizing device 10. respect is the same as the length _{L 1} of the first magnetizing device 40 of the fourth embodiment, the length of the direction perpendicular to the column direction of the second magnetizing head 41a, 42a of the magnet pieces 111 _{L 2} Is shorter than the length L ₁ of the magnet piece 111.

  Next, a method for magnetizing the magnet piece 111 of the six-pole rotor 110 by the magnetizing device 40 of the fourth embodiment will be described. First, as shown in FIG. 4A, in the first step, the magnetizing device 40 is positioned on one side in the longitudinal direction of the magnet piece 111 of the six-pole rotor 110, and the n and o parts ( Magnetized in one longitudinal direction).

  Next, in a second step (not shown), the first and second magnetizing heads 41a and 42a are separated from the magnet piece 111, the six-pole rotor 110 is moved in the axial direction, and the other side of the magnet piece 111 in the longitudinal direction. It is made to oppose and the p part and q part (refer FIG. 4-2: longitudinal direction other side) of the magnet piece 111 are made to oppose.

  Next, as shown in FIG. 4B, in the third step, the first and second magnetizing heads 41a and 42a are brought close to the magnet piece 111, and the p-part and q-part of the magnet piece 111 (the other in the longitudinal direction, etc.). Magnetize the side).

  Combining the first to third steps described above and the second to third steps described in the first embodiment, the other magnetized magnet pieces 111 are also magnetized and adjacent to each other. Magnetization is performed so that the polarities of the outer surfaces of the magnet pieces 111 are different.

  In the first to third embodiments, the length in the direction perpendicular to the column direction of the magnet pieces of the first and second magnetizing heads of the magnetizing device is not particularly limited, and the lengths of the first and second magnetizing heads are not particularly limited. It is desirable that the length is longer than the length of the magnet piece because the length direction of the magnet piece can be magnetized at a time. However, if the length in the direction perpendicular to the column direction of the magnet pieces of the first and second magnetizing heads is long, the first and second coil lengths become long and the resistance component becomes large, so a large magnetizing current flows. There is a need. Therefore, when expensive power supply facilities are required, or when there is a concern about insulation of the first and second yokes, the length of the first and second magnetizing heads is made shorter than the length of the magnet piece, The longitudinal direction of the piece is divided and magnetized. This magnet piece lengthwise division magnetization method can also be applied to the magnetization methods of the second and third embodiments.

Embodiment 5 FIG.
FIG. 5-1 is a partial front view showing Embodiment 5 of the magnetizing apparatus according to the present invention, and FIG. 5-2 shows the rotor shown in FIG. FIG. 5 is a partial front view showing a state in which different rotors are magnetized.

  As shown in FIG. 5A, the magnetizing apparatus 50 according to the fifth embodiment magnetizes ten curved plate-shaped magnet pieces 151a embedded in the outer periphery of a small 10-pole flower rotor 150a. Do. The magnetizing device 50 includes a third yoke (not shown) whose outer shape is a rectangular thick plate shape, a first yoke 51 having an L-shaped thick plate shape, and a second yoke (not shown) having an L-shaped thick plate shape. One side of the first yoke 51 and the second yoke constitutes a first magnetizing head 51a and a second magnetizing head (not shown). The circumferential width (column width) H of the first magnetizing head 51a and the second magnetizing head is smaller than the circumferential width (column width) K of the magnet piece 151a.

  A first coil 51b and a second coil (not shown) are wound around the first magnetizing head 51a and the second magnetizing head, respectively. End faces of the first magnetizing head 51a and the second magnetizing head facing the magnet pieces 151a have a radius of curvature equivalent to the radius of curvature R of the outer surface of the 10-pole flower rotor 150a. The other sides of the first yoke 51 and the second yoke constitute a first leg 51c and a second leg (not shown), and the first leg 51c and the second leg are in contact with the third yoke, respectively. Yes.

  As shown in FIG. 5B, the magnetizing device 50 according to the fifth embodiment magnetizes the six flat magnet pieces 151b embedded in the outer periphery of the large six-pole rotor 150b. You can also. In the first to fourth embodiments, the shape of the end surfaces of the first and second magnetizing heads is not particularly limited, but the magnet piece and the first and second attachments are matched to the shape of the outer surface of the magnet piece. This is desirable because the gap between the magnetic heads becomes smaller and the generated magnetic field becomes stronger.

  The end face shape of the first and second magnetizing heads is the curvature of the outer surface of the magnet piece 151a of the 10-pole flower rotor 150a having the smallest radius of curvature R among the magnet pieces of the rotor to be magnetized. By adjusting to the radius, the gap with the magnet piece 151a when the first and second magnetizing heads are close to the 10 pole flower type rotor 150a becomes small. Although a slight gap is generated in the r portion of FIG. 5-1, a large loss that weakens the magnetization does not occur. Further, the gap with the magnet piece 151b when the first and second magnetized heads are close to the hexapole rotor 150b is also reduced. Although a slight gap is generated at the s portion in FIG. 5B, a large loss that weakens the magnetization does not occur.

Embodiment 6 FIG.
In the first to fifth embodiments, the shapes of the first and second yokes are not particularly limited. However, when magnetizing the rotor magnet pieces as shown in FIGS. It is desirable that the first and second yokes be L-shaped so that the first and second yokes can be easily brought into contact with the third yoke.

  As shown in FIG. 1-1, the length of the third yoke 13 is set to a length corresponding to the rotor 110 having the largest outer diameter among the rotors to be magnetized, and the first and second yokes 11, By moving 12, it is possible to cope with a rotor having a small outer diameter difference and a small number of poles. Further, by providing a gap so that the magnetic flux line J does not pass through the Q portion (see FIG. 1-1) between the rotor 110 and the third yoke 13, the loss is suppressed and the magnetization of the magnet piece 111 is strengthened. be able to.

Embodiment 7 FIG.
FIG. 6-1 is a front view showing Embodiment 7 of the magnetizing apparatus according to the present invention, and FIG. 6-2 shows the magnetizing apparatus and magnet pieces of Embodiment 7 in the column direction of the magnet pieces. FIG. 6-3 is a front view illustrating a state in which the magnetic pole is relatively moved by one pole. FIG. 6-3 is a diagram illustrating a state in which the magnetizing device of Embodiment 7 and the magnet piece are further moved by one pole in the row direction of the magnet pieces. FIG.

As shown in FIG. 6A, the magnetizing device 70 according to the seventh embodiment includes a plurality of rectangular parallelepiped unmagnetized magnets arranged on a base (iron core: the same applies hereinafter) 172 of a stator 170 of a linear motor. The magnet piece 171 is magnetized. The magnet pieces 171 are magnetized so that the polarities of the outer surfaces of adjacent magnet pieces 171 are different from each other. The magnetizer 70 and the stator 170, in order to divide magnetization of magnet pieces 171, in the column direction of the magnet piece 171, to move relative each pole pitch _{P 1} of the magnet piece 171.

The magnetizing device 70 has a portal thick plate shape, and has a first yoke 71 and 72 facing the magnet piece 171, and a third yoke 73 connecting the first and second yokes 71 and 72. have. The first and second yokes 71 and 72 constitute first and second magnetized heads. The slot pitch P ₂ between the first and second magnetizing heads 71 and 72 is larger than the pole pitch P ₁ of the magnet pieces 171. The column direction width H of the first and second magnetizing heads 71 and 72 is smaller than the column direction width K of the magnet piece 171.

  First and second coils 71b and 72b are wound around the first and second magnetizing heads 71 and 72, respectively. As shown in FIG. 6-2, the first and second coils 71b and 72b have the polarities of the upper side surfaces of the magnet pieces 171 adjacent to each other so that one is an S pole and the other is an N pole. The magnetic flux lines J emitted from the first magnetizing head 71 are in the order of the magnet piece 171 → the iron core 172 → the magnet piece 171 separated by one piece → the second magnetizing head 72 → the third yoke 73 → the first magnetizing head 71. The first coil 71 b is clockwise when viewed from the end face side of the first magnetizing head 71, and the second coil 72 b is counterclockwise when viewed from the end face side of the second magnetizing head 72 so as to go around. It is wound.

The first and second magnetizing heads 71 and 72 and the third yoke 73 may be separated, but the column width of the magnet piece 171 in the stator 170 of the linear motor to be magnetized. In the case where K and the pole pitch P ₁ are the same and the total length of the stator 170 is different, the first and second magnetized heads 71 and 72 and the third yoke 73 are preferably integrated.

  As shown in FIG. 6A, in the first step, the outer surface of the t portion of the magnet piece 171 (front side in the column direction of the magnet piece 171) is the N pole on the first and second magnetizing heads 71 and 72. A magnetic field is generated so as to be magnetized.

Next, in the second step, the magnetizing device 70 is moved upward to separate the first and second magnetizing heads 71 and 72 from the magnet pieces 171 and the magnetizing device 70 is separated by a pole pitch P ₁ minutes. As shown in FIG. 6B, the first and second magnetizing heads 71 and 72 are moved to the u direction (front side of the magnet piece 171 adjacent to the front) and v part, respectively. It is made to oppose (the back side of the magnet piece 171).

  Next, in the third step, the magnetizing device 70 is moved downward to bring the first and second magnetizing heads 71 and 72 close to the magnet piece 171, and the magnetizing power source and the first and second coils. The direction of the magnetizing current is switched by interposing a thyristor or a contactor between 71b and 72b, and the u part of the magnet piece 171 (the front side of the magnet piece 171 adjacent to the front side) is switched to the first and second magnetizing heads 71 and 72. ) Is magnetically generated so that the outer surface of S) is magnetized to the S pole and the outer surface of the v portion (the rear side of the magnet piece 171) is magnetized to the N pole.

The second to third steps described above are repeated to magnetize other unmagnetized magnet pieces 171 and magnetize so that the polarities of the outer surfaces of adjacent magnet pieces 171 are different. That is, in the next second step, the magnetizing device 70 is moved upward to separate the first and second magnetizing heads 71 and 72 from the magnet pieces 171 and the magnetizing device 70 is pole pitch P _1. As shown in FIG. 6-3, the first and second magnetizing heads 71 and 72 are moved to the w part of the magnet piece 171 (the front side of the magnet piece 171 adjacent to the front) and the x part ( The magnet piece 171 is opposed to the rear side.

  Next, in the third step, the magnetizing device 70 is moved downward to bring the first and second magnetizing heads 71 and 72 close to the magnet piece 171, and the magnetizing power source and the first and second coils. The direction of the magnetizing current is switched by interposing a thyristor or a contactor between 71b and 72b, and the first and second magnetizing heads 71 and 72 are switched to the w portion of the magnet piece 171 (the front side of the magnet piece 171 adjacent to the front). ) Is magnetically generated so that the outer surface of N) is magnetized to the N pole and the outer surface of the x portion (the rear side of the magnet piece 171) is magnetized to the S pole.

  The magnetizing device 70 and the magnetizing method of the seventh embodiment described above have the same effects as the magnetizing device 10 and the magnetizing method of the first embodiment.

Embodiment 8 FIG.
FIG. 7-1 is a front view showing Embodiment 8 of the magnetizing apparatus according to the present invention, and FIG. 7-2 shows the magnetizing apparatus and magnet pieces of Embodiment 8 in the column direction of the magnet pieces. FIG. 7-3 is a front view illustrating a state in which the two poles are relatively moved, and FIG. 7-3 illustrates a state in which the magnetizing device of Embodiment 8 and the magnet pieces are further moved relative to each other in the row direction of the magnet pieces. FIG. 7-4 is a front view showing a state in which the magnetizing device and the magnet piece of the eighth embodiment are further moved relative to each other by two poles in the row direction of the magnet piece.

As shown in FIG. 7A, the magnetizing apparatus 80 according to the eighth embodiment is configured to magnetize a plurality of cuboidal unmagnetized magnet pieces 181 arranged in a row on a base 182 of a stator 180 of a linear motor. Magnetize. The magnet pieces 181 are magnetized so that the polarities of the outer surfaces of adjacent magnet pieces 181 are different from each other. The magnetizer 80 and the stator 180, in order to divide magnetization of magnet pieces 181, in the column direction of the magnet piece 181, to move relative each twice the pole pitch _{P 1} of the magnet piece 181 (2 pole area) .

  The magnetizing device 80 has a double gate-like thick plate shape, and two portal magnetizing devices are connected by a yoke. The magnetizing device 80 includes a pair of first and second yokes 81 and 82 facing the magnet piece 171, another pair of third and fourth yokes 83 and 84 facing the magnet piece 181, And a fifth yoke 85 connecting the first to fourth yokes 81 to 84.

The first to fourth yokes 81 to 84 constitute first to fourth magnetized heads, respectively. First, second magnetizing head 81 and between the third, slot pitch _{P 2} between the fourth magnetizing head 83 and 84 is greater than the pole pitch _{P 1} of the magnet piece 181. The slot pitch P ₃ between the first and third magnetizing heads 81 and 83 and between the second and fourth magnetizing heads 82 and 84 is three times (three poles) the pole pitch P ₁ of the magnet pieces 181. ing. The column direction width H (see FIG. 7B) of the first to fourth magnetizing heads 81 to 84 is smaller than the column direction width K of the magnet piece 181.

  First and second coils 81b and 82b are wound around the first and second magnetizing heads 81 and 82, respectively. As shown in FIG. 7-2, the first and second coils 81b and 82b are arranged in such a way that the polarity of the upper surface of the magnetized magnet piece 181 is N-pole and the other is S-pole. The magnetic flux lines J emitted from the magnetizing head 82 circulate in the order of the magnet piece 181 → the iron core 182 → the magnet piece 181 separated by 1 → the first magnetizing head 81 → the fifth yoke 85 → the second magnetizing head 82. Thus, the first coil 81b is wound clockwise when viewed from the end face side of the first magnetizing head 81, and the second coil 82b is wound counterclockwise when viewed from the end face side of the second magnetizing head 82. Yes. The third and fourth magnetizing heads 83 and 84 are wound with third and fourth coils 83b and 84b, respectively. The winding methods are the same as the first and second coils 81b and 82b, respectively. It is a reverse winding.

The first to fourth magnetizing heads 81 to 84 and the fifth yoke 85 may have a separated structure, but the column width of the magnet piece 181 in the stator 180 of the linear motor to be magnetized. In the case where K and the pole pitch P ₁ are the same and the total length of the stator 180 is different, the first to fourth magnetized heads 81 to 84 and the fifth yoke 85 are preferably integrated.

  As shown in FIG. 7A, in the first step, the outer surface of the y1 portion of the magnet piece 181 (the front side in the column direction of the magnet piece 181) is the N pole in the first and second magnetization heads 81 and 82. A magnetic field is generated so as to be magnetized.

  Next, in the second step, the magnetizing device 80 is moved upward to separate the first and second magnetizing heads 81 and 82 from the magnet piece 181, and the magnetizing device 80 is moved forward 2 in the column direction. As shown in FIG. 7B, the first and second magnetizing heads 81 and 82 are moved to the y2 portion of the magnet piece 181 (the front side of the magnet piece 181 in front of the two poles) and the y3 portion, respectively. It is made to oppose (the back side of the magnet piece 181 ahead of 1 pole).

  Next, in the third step, the magnetizing device 80 is moved downward so that the first and second magnetizing heads 81 and 82 are brought close to the magnet piece 181, and the first and second magnetizing heads 81, 82, a magnetic field is generated so that the outer surface of the y2 portion of the magnet piece 181 is magnetized to the N pole and the outer surface of the y3 portion is magnetized to the S pole.

  Next, in the fourth step, the magnetizing device 80 is moved upward to separate the first and second magnetizing heads 81 and 82 from the magnet pieces 181, and the magnetizing device 80 is further moved forward in the column direction. As shown in FIG. 7C, the first, second, third, and fourth magnetizing heads 81, 82, 83, and 84 are moved to the y4 portion, the y5 portion of the magnet piece 181 respectively. It is made to oppose y6 part and y7 part.

  Next, in the fifth step, the magnetizing device 80 is moved downward to bring the first, second, third, and fourth magnetizing heads 81, 82, 83, 84 close to the magnet piece 181, The first, second, third, and fourth magnetizing heads 81, 82, 83, and 84 have an outer surface of the y4 portion of the magnet piece 181 with an N pole, an outer surface of the y5 portion with an S pole, and an outer surface of the y6 portion. Generates a magnetic field so that the outer surface of the Y pole is magnetized to the N pole.

  Next, in the sixth step, the magnetizing device 80 is moved upward to separate the first, second, third, and fourth magnetizing heads 81, 82, 83, 84 from the magnet piece 181; The magnetizing device 80 is further moved forward by two poles in the column direction, and as shown in FIG. 7-4, the third and fourth magnetizing heads 83 and 84 are moved to the y8 and y9 parts of the magnet piece 181 respectively. Make them face each other.

  Next, in the seventh step, the magnetizing device 80 is moved downward to bring the third and fourth magnetizing heads 83 and 84 close to the magnet piece 181, and the third and fourth magnetizing heads 83, 84, a magnetic field is generated so that the outer surface of the y8 portion of the magnet piece 181 is magnetized to the S pole and the outer surface of the y9 portion is magnetized to the N pole.

  The above-described steps are repeated to magnetize other unmagnetized magnet pieces 181 and magnetize so that the polarities of the outer surfaces of adjacent magnet pieces 181 are different.

The magnetizing device 80 according to the eighth embodiment is similar to the magnetizing devices according to the first to seventh embodiments. The first and second magnetizing heads 81 and 82 and the third and fourth magnetizing heads are paired. by the slot pitch _{P 2} of 83 and 84 larger than the pole pitch _{P 1} of the magnet pieces 181, it is possible to increase the insulation and cooling spaces of the first to fourth coil 81B～84b, magnetizing apparatus 80 Long life. Moreover, since the magnetic flux line J circulates greatly, the end of the magnet piece 181 can be strongly magnetized, and the magnetization rate can be increased. The magnetizing device 80 and the magnetizing method of the eighth embodiment have the same effects as the magnetizing device 10 and the magnetizing method of the first embodiment.

  In the eighth embodiment, the magnetizing device 80 is an example in which two gate-shaped magnetizing devices are connected by a yoke. However, three or more portal-shaped magnetizing devices are connected by a yoke. It may be.

Embodiment 9 FIG.
FIG. 8-1 is a perspective view showing Embodiment 9 of the magnetizing apparatus according to the present invention, and FIG. 8-2 shows the magnetizing apparatus and magnet pieces of Embodiment 9 in the direction perpendicular to the row of magnet pieces. It is a perspective view which shows the state moved to relative to.

  As shown in FIG. 8A, the magnetizing device 90 according to the ninth embodiment includes a plurality of unmagnetized magnet pieces 191 that are arranged in a row on the base 192 of the stator 190 of the linear motor. Magnetize. The magnet pieces 191 are magnetized so that the polarities of the outer surfaces of adjacent magnet pieces 191 are different from each other. The magnetizing device 90 and the stator 190 relatively move by the pole pitch (not shown) of the magnet pieces 191 in the column direction of the magnet pieces 191 in order to divide and magnetize the magnet pieces 191.

  The magnetizing device 90 has a portal thick plate shape, and has first and second yokes 91 and 92 facing the magnet piece 191, and a third yoke 93 connecting the first and second yokes 91 and 92. doing. The first and second yokes 91 and 92 constitute first and second magnetized heads. First and second coils 91b and 92b are wound around the first and second magnetizing heads 91 and 92, respectively. The slot pitch (not shown) between the first and second magnetizing heads 91 and 92 is larger than the pole pitch of the magnet pieces 191. The width in the column direction of the first and second magnetizing heads 91 and 92 is smaller than the width in the column direction of the magnet piece 191.

  The shapes of the first and second magnetizing heads 91 and 92, the third yoke 93, and the first and second coils 91b and 92b of the magnetizing device 90 of the ninth embodiment are the same as those of the magnetizing device 70 of the seventh embodiment. Although similar, the length in the direction perpendicular to the column direction of the magnet pieces 171 of the first and second magnetizing heads 71 and 72 of the magnetizing device 70 is the same as the length of the magnet pieces 171. The length in the direction perpendicular to the column direction of the magnet pieces 191 of the first and second magnetizing heads 91 and 92 of the magnetizing apparatus 90 of the ninth embodiment is shorter than the length of the magnet pieces 191.

  Next, a method of magnetizing the magnet piece 191 of the stator 190 of the linear motor by the magnetizing device 90 of the ninth embodiment will be described. First, as shown in FIG. 8A, in the first step, the magnetizing device 90 is positioned on one side in the longitudinal direction of the magnet piece 191 of the stator 190, and the Z1 portion and Z2 portion (longitudinal direction) of the magnet piece 191 are arranged. Magnetize on one side.

  Next, in a second step (not shown), the first and second magnetizing heads 91 and 92 are separated from the magnet piece 191, and the magnetizing device 90 and the stator 190 are moved in the column perpendicular direction (longitudinal direction) of the magnet piece 191. ), Is positioned on the other side in the longitudinal direction of the magnet piece 191, and is opposed to the Z3 portion and the Z4 portion (the other side in the longitudinal direction) of the magnet piece 191.

  Next, as shown in FIG. 8B, in the third step, the first and second magnetizing heads 91 and 92 are brought close to the magnet piece 191, and the first and second magnetizing heads 91 and 92 are Magnetization is performed on the Z3 portion and the Z4 portion (the other side in the longitudinal direction) of the magnet piece 191.

  Combining the first to third steps described above and the second to third steps described in the seventh embodiment, the other magnetized magnet pieces 191 are magnetized and adjacent to each other. Magnetization is performed so that the polarities of the outer surfaces of the magnet pieces 191 are different.

  In the seventh and eighth embodiments, the length in the direction perpendicular to the column direction of the magnet pieces of the magnetizing head of the magnetizing device is not particularly limited, but the length of the magnetizing head is longer than the length of the magnet pieces. However, it is desirable because the length direction of the magnet piece can be magnetized at a time. However, if the length in the direction perpendicular to the column direction of the magnet pieces of the magnetizing head is long, the coil length becomes long and the resistance component becomes large, so that a large magnetizing current needs to flow. Therefore, when expensive power supply facilities are required or when there is a concern about insulation of the magnetized head, the length of the magnetized head is made shorter than the length of the magnet piece, and the longitudinal direction of the magnet piece is divided. Magnetize. The magnet piece lengthwise division magnetization method can also be applied to the magnetization method of the eighth embodiment. The magnetizing device 90 and the magnetizing method of the ninth embodiment have the same effects as the magnetizing device 10 and the magnetizing method of the first embodiment.

  10, 20, 30, 40, 50, 70, 80, 90 Magnetizer, 11, 21, 31, 41, 51, 71, 81, 91 First yoke, 11a, 21a, 31a, 41a, 51a, 71, 81, 91 1st magnetization head, 11b, 21b, 31b, 41b, 51b, 71b, 81b, 91b 1st coil, 11c, 21c, 31c, 41c, 51c 1st leg, 12, 22, 32, 42, 72, 82, 92 Second yoke, 12a, 22a, 32a, 42a, 52a, 72, 82, 92 Second magnetizing head, 12b, 22b, 32b, 42b, 72b, 82b, 92b Second coil, 12c, 22c , 32c Second leg, 13, 23, 33, 43, 73 Third yoke, 85 Fifth yoke, 110, 120, 130, 150a, 150b Rotor, 170, 180 190 stator, 111,121,131,151A, 151b magnet pieces, 112,122,132,172,182,192 core.

Claims (9)

In a magnetizing apparatus that magnetizes a plurality of unmagnetized magnet pieces arranged in a row in or on an iron core such that the polarities of the outer surfaces of adjacent magnet pieces are different from each other,
A first yoke having a first magnetizing head wound with a first coil and having a column width smaller than that of the magnet pieces;
When the second coil is wound and the first magnetizing head is positioned so as to face the front side in the row direction of the predetermined magnet piece, the front side or row of the magnet pieces spaced apart from the predetermined magnet piece by an odd number A second yoke having a second magnetization head positioned so as to be opposed to the rear side in the direction and having a column direction width smaller than the column direction width of the magnet piece;
A third yoke that magnetically connects the first yoke and the second yoke,
In the first coil and the second coil, magnetic flux lines generated from the first magnetizing head of the first yoke by energizing the first and second coils are such that the predetermined magnet piece → the iron core → the odd number The magnet pieces are wound so as to circulate in the order of separated magnet pieces → second yoke having the second magnetizing head → third yoke → first yoke ,
A magnetizing apparatus, wherein a slot pitch between the first magnetizing head and the second magnetizing head is larger than the odd multiple of the pole pitch between adjacent magnet pieces .   2. The magnetizing apparatus according to claim 1, wherein the first and second magnetizing heads are movable from a magnetizing position close to the magnet piece to a position separated from the magnet piece.   The magnetizing apparatus according to claim 1, wherein a length of the first and second magnetizing heads in a direction perpendicular to the column direction of the magnet pieces is shorter than a length of the magnet pieces.   2. The magnetizing apparatus according to claim 1, wherein end surfaces of the first and second magnetizing heads are curved with a curvature radius that approximates a curvature radius of the curved iron core.   The magnetizing apparatus according to claim 1, wherein the iron core in which the plurality of unmagnetized magnet pieces are arranged in a row is an iron core of a rotor of a rotating electric machine.   2. The magnetizing apparatus according to claim 1, wherein the iron core in which the plurality of unmagnetized magnet pieces are arranged in a row is a base of a stator of a linear motor.   7. The magnetizing device according to claim 6, comprising two or more magnetizing devices according to claim 1, wherein the two or more magnetizing devices are connected by a yoke. The first and second magnetizing heads of the magnetizing apparatus according to claim 1, wherein a plurality of unmagnetized magnet pieces arranged in a row in or on the iron core are arranged in front of a predetermined magnet piece, and , the column direction Kogo side of odd number spaced magnet pieces in the column direction from the predetermined magnet pieces, each in close proximity, a portion of the outer surface of the predetermined magnet pieces and odd spaced apart magnet pieces, polarities different from each other A process of magnetizing
The first and second magnetizing heads of the magnetizing device and the iron core are moved relative to each other by a predetermined distance in the row direction of the magnet pieces, and the first and second magnetizing heads are respectively moved on the outer surfaces of different magnet pieces. Magnetizing so that the outer surfaces of adjacent magnet pieces have different polarities from each other,
And magnetizing each magnet piece in a divided manner. The first and second magnetizing heads of the magnetizing apparatus according to claim 3, wherein the longitudinal length of the predetermined magnet piece in the row direction of a plurality of unmagnetized magnet pieces arranged in a row on the iron core or on the iron core. direction one side, and, in one longitudinal side of the column side Kogo side of odd number spaced magnet pieces in the column direction from the predetermined magnet pieces, each in close proximity, of the predetermined magnet pieces and odd spaced apart magnet pieces Magnetizing parts of the outer surface with different polarities;
The first and second magnetizing heads of the magnetizing device are relatively moved to the other side in the longitudinal direction of the magnet piece, and the other side in the longitudinal direction of the predetermined magnet piece in the row direction and the predetermined magnet piece. from the other longitudinal side of the column side Kogo side of odd number spaced magnet pieces in the column direction, respectively to close, the portion of the outer surface of the predetermined magnet pieces and odd spaced apart magnet pieces, the different polarities Magnetizing, and
The first and second magnetizing heads of the magnetizing device and the iron core are moved relative to each other by a predetermined distance in the row direction of the magnet pieces, and the first and second magnetizing heads are respectively moved on the outer surfaces of different magnet pieces. Magnetizing so that the outer surfaces of adjacent magnet pieces have different polarities from each other,
And magnetizing each magnet piece in a divided manner.

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