JP2006121814A - Linear motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To adhere and fix permanent magnets to yokes in a non-magnetized state in a magnetic field of a linear motor. <P>SOLUTION: The linear motor comprises a magnetic field wherein a plurality of the permanent magnets are arranged in two rows, and armature windings that are arranged between the permanent magnets with air gaps between. The magnetic field is divided by magnetic field units 201, 202. The first magnetic field unit 201 comprises the first yokes 251 to which the first permanent magnets 211 are arranged, and first notches 241 formed between the first yokes 251. The second magnetic field unit 202 comprises the second yokes 252 to which the second permanent 212 magnets are arranged, and second notches 242 formed between the second yokes 252. The first yokes 251 are connected to the second notches 242 so that the second yokes 252 are positioned at the first notches 241, orientations of magnetization of the first permanent magnets 211 are aligned in the same direction, and orientations of magnetization of the second permanent magnets 212 are aligned in a direction opposite to the same direction. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a structure of a field portion of a linear motor that fixes a permanent magnet to a yoke.

  Conventionally, a field part formed by arranging a plurality of flat permanent magnets at equal intervals inside the upper yoke and the lower yoke facing each other, and an armature winding disposed in a magnetic gap formed by the permanent magnets And a permanent magnet for the upper yoke and the lower yoke in a linear motor that linearly moves the field portion and the armature winding portion by exciting the armature winding to generate a thrust force. There is a recess in which the flat portion of the permanent magnet can be accommodated at the arrangement location, and the permanent magnet is embedded and fixed in the recess (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 11-18405 (paragraph [0005], FIG. 1)

  In the field part of the conventional linear motor as described above, when the permanent magnet is disposed on the yoke, the magnetized permanent magnet is fixed to the yoke using an adhesive or the like. Therefore, at the time of fixing the permanent magnet, an attractive force acts between the permanent magnet and the yoke, and an attractive force or a repulsive force acts between the permanent magnets, so that the assembling workability of the field part is poor. Further, since the permanent magnets are repelled or attracted to each other, the permanent magnets collide with each other.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a field part structure that can easily fix a permanent magnet to a yoke when manufacturing a field part of a linear motor. It is said.

  In the linear motor according to the present invention, a plurality of permanent magnets are arranged in two rows, and a field portion formed on the yoke so that the two rows of permanent magnets face each other at a predetermined interval, and two rows of permanent magnets Armature winding portions disposed at predetermined intervals via an air gap, and the field portion is divided and configured by a first field unit and a second field unit, and the first field unit Has a first yoke portion in which the first permanent magnets are installed in two rows, and a first notch disposed between the first yoke portions, and a second field magnet. The unit includes a second yoke portion in which the second permanent magnets are installed in two rows, and a second notch disposed between the second yoke portions. The two field units are connected such that the first yoke portion is located in the second notch and the second yoke portion is located in the first notch. In The direction of magnetization of the placed first permanent magnet is aligned in the same direction, and the direction of magnetization of the second permanent magnet installed in the second yoke portion is opposite to the same direction. It is characterized by being arranged in.

  The linear motor according to the present invention includes a field portion in which a plurality of permanent magnets are arranged in a row on the yoke, and an armature winding portion that is arranged in one row of permanent magnets through an air gap. The field portion is divided into a first field unit and a second field unit, and the first field unit includes a first yoke in which first permanent magnets are arranged in a row. And a first notch disposed between the first yoke portion, and the second field unit includes a second yoke in which the second permanent magnets are installed in a row. An iron part and a second notch disposed between the second yoke part, and the first and second field units have the first yoke part as the second notch. Are connected so that the second yoke portion is located in the first notch, and the magnetization directions of the first permanent magnets installed in the first yoke portion are aligned in the same direction. The second successor The second direction is the same direction of magnetization of the permanent magnets installed in the section, characterized in that are aligned in the opposite direction.

  In the linear motor according to the present invention, a plurality of permanent magnets are arranged in two rows, and a field portion formed on the yoke so that the two rows of permanent magnets face each other at a predetermined interval, and two rows of permanent magnets. The permanent magnets are arranged in two rows where the permanent magnets of the yoke of the field part are arranged. The yoke portion and the movable yoke portion are alternately provided in the column direction, and the movable yoke portion is configured so that the armature winding side surface on which the permanent magnet is disposed faces at least 180 degrees in the opposite direction. The direction of the magnetization of the permanent magnet installed in the fixed yoke part is aligned in the same direction, and the direction of the magnetization of the permanent magnet installed in the movable yoke part is the same direction It is characterized by being aligned in the opposite direction.

  The linear motor according to the present invention includes a field portion in which a plurality of permanent magnets are arranged in a row on the yoke, and an armature winding portion that is arranged in one row of permanent magnets through an air gap. The yoke of the magnetic field portion is provided with a stationary yoke portion and a movable yoke portion alternately arranged in the row direction, each having a permanent magnet, and the movable yoke portion is provided with a permanent magnet. The armature winding side surface is rotatably provided in the field part so that it faces in the opposite direction at least 180 degrees, and the magnetization directions of the permanent magnets installed in the fixed yoke part are aligned in the same direction, The direction of magnetization of the permanent magnets installed in the movable yoke portion is aligned in the direction opposite to the same direction.

  According to the linear motor of the present invention, the magnetization direction of the permanent magnet fixed to each unit of the first field unit or the second field unit, or the fixed yoke portion or the movable yoke portion is the same. Therefore, after the permanent magnet is bonded to the yoke in an unmagnetized state, it can be magnetized by applying a magnetic field for each unit. That is, since the permanent magnet can be bonded to the yoke in an unmagnetized state, it can be easily arranged, the productivity can be improved, and the permanent magnet can be prevented from cracking or chipping. It is.

Embodiment 1 FIG.
1 is an overall perspective view showing a linear motor according to Embodiment 1 of the present invention, and FIG. 2 is a view of the linear motor of FIG. FIG. 3 is a perspective view showing the configuration of the field portion of the linear motor of FIG.

  1 and 2, a linear motor 1 is composed of a field portion 2 of a linear motor and an armature winding portion 3 of the linear motor. The field portion 2 of the linear motor is configured by a plurality of permanent magnets 21 arranged in parallel in two rows and fixed to a yoke 22 so that the two rows of permanent magnets 21 face each other with a gap therebetween. The armature winding portion 3 is disposed between the two rows of permanent magnets 21 via the air gap 4. In the example of FIG. 2, an armature coil (toroidal coil) 33 is wound around a hollow bobbin 32. The worn piece is formed by being inserted into the center yoke 31. In FIG. 2, the indication of the polarity (N, S) of the permanent magnet 21 represents the polarity on the surface side of the armature winding portion 3, and the same applies to the following drawings.

  As shown in FIG. 3, the field unit 2 of the linear motor is configured by being divided into a first field unit 201 and a second field unit 202, and the first and second field units 201, 202 are configured. A frame 23 is bonded and fixed to the outer side surface of the frame.

  In the present embodiment, as shown in FIG. 2, the polarities of the adjacent magnetic poles in the permanent magnet 21 of the field part 2 are different, and the polarities of the magnetic poles facing the armature winding part 3 are the same. A description will be given using the one provided in the above.

  FIG. 4 is a perspective view showing the first field unit 201 of FIG. 3, and FIG. 5 corresponds to a view of the first field unit 201 of FIG. FIG. 6 is a perspective view showing the second field unit 202 of FIG. 3, and FIG. 7 corresponds to a view of the second field unit 202 of FIG. FIG. 8 is a perspective view showing a state in which the field unit 2 of the linear motor is configured by combining two field units 201 and 202.

  As shown in FIGS. 4 and 5, the first field unit 201 includes a first permanent magnet 211 and a first yoke 221. The first yoke 221 includes a first yoke part 251 in which the first permanent magnets 211 are arranged in parallel, and a support part 261 that connects the first yoke part 251, and has a U-shape. Is made. The first yoke portions 251 and the first notches 241 are alternately disposed in both rows of the first yokes 221 where the first permanent magnets 211 are disposed. A permanent magnet with an N pole magnetized on the inner surface is arranged on one side of the yoke part 251, and a permanent magnet with an S pole magnetized on the inner surface is arranged on the other side of the yoke part 251. Has been. That is, in the first field unit 201, the magnetization directions of the first permanent magnets 211 installed in the first yoke portion 251 are aligned in the same direction in both rows.

  As shown in FIGS. 6 and 7, the second field unit 202 includes a second permanent magnet 212 and a second yoke 222. The second yoke 222 includes a second yoke part 252 in which the second permanent magnets 212 are arranged in parallel, and a support part 262 that connects the second yoke part 252 and has a U-shape. Is made. The second yoke portions 252 and the second notches 242 are alternately disposed in both rows of the second yoke 222 where the second permanent magnet 212 is disposed. A permanent magnet with an S pole magnetized on the inner surface is arranged on one side of the yoke part 252, and a permanent magnet with an N pole magnetized on the inner surface is arranged on the other side of the yoke part 252. Has been. That is, in the second field unit 202, the magnetization direction of the second permanent magnet 212 installed in the second yoke portion 252 is opposite to the first permanent magnet 211 in both rows. It is aligned.

  As shown in FIG. 8, the second yoke notch 242 is formed so that the first field unit 201 can be inserted into the second field unit 202 from the direction indicated by arrow B. The yoke support 262 is also provided.

  Here, in FIGS. 4 to 7, the polarities of the first and second permanent magnets 211 and 212 are described, but the first and second permanent magnets 211 and 212 are replaced with the first and second yokes 221. , 222 are not magnetized in all permanent magnets.

  FIG. 9 is a diagram for explaining a method of simultaneously magnetizing the two field units 201 and 202, and shows a state in which the first and second field units 201 and 202 are arranged in the air-core coil 5. FIG.

  Here, a method of magnetizing the first and second permanent magnets 211 and 212 will be described with reference to FIG. The air-core coil 5 is obtained by winding a coil 501 around a cylindrical tube 502, and the first and second field units 201 and 202 are arranged on a base 503 provided inside the tube 502. To do. At this time, the first and second field units 201 and 202 are arranged so that the first and second permanent magnets 211 and 212 are magnetized in the predetermined direction described above. Then, by supplying a current to the coil 501 of the air-core coil 5, a uniform magnetic field is applied to the inside of the cylinder 502 in the direction indicated by the arrow C, and the magnetic poles of the first and second permanent magnets 211 and 212. Are aligned in the magnetization direction shown in FIG. Thereafter, as shown in FIG. 8, the first and second field units 201 and 202 are overlapped and connected so that the yoke portions 251 and 252 are located in the notches 242 and 241, respectively. .

  Further, the yokes used for the first and second field unit 201, 202 are created by bending a thin metal plate of a magnetic material, for example, and as shown in FIG. 3, the first and second field unit 201, A magnetic material frame 23 is fixed to the outer side surface of 202 by bonding or the like. In this way, by manufacturing the sheet metal by bending, the yoke can be manufactured easily, and when the first and second field portions 201 and 202 are connected, the deflection of the sheet metal can be used and assembled. Is also easier. Further, by connecting and fixing the frame 23, the connection performance of the first and second field unit 201, 202 can be improved, and the rigidity of the field part 2 of the linear motor can be increased. The frame 23 may be U-shaped so as to cover the first and second field units 201 and 202.

  As described above, according to the present embodiment, the permanent magnet 21 (the first permanent magnet 211, the second permanent magnet 212) is not magnetized and the yoke 22 (the first yoke 221, the second permanent magnet 212) is not magnetized. Since the permanent magnet 21 (the first permanent magnet 211, the second permanent magnet 212) can be fixed to the yoke 22 (the first yoke 221 and the second yoke 222), the work can be easily performed. , Productivity is increased. In addition, cracking and chipping of the permanent magnet 21 (the first permanent magnet 211 and the second permanent magnet 212) can be prevented, and product reliability can be improved. Further, after the permanent magnet 21 (first permanent magnet 211, second permanent magnet 212) is fixed to the yoke 22 (first yoke 221 and second yoke 222), the permanent magnet is simultaneously formed by the air-core coil 5. 21 (first permanent magnet 211, second permanent magnet 212) can be magnetized, and the magnetizing operation can be facilitated.

  In the above embodiment, as shown in FIG. 2, in the permanent magnet 21 of the field part 2, the polarities of the adjacent magnetic poles in the row are different, and the polarities of the magnetic poles facing the armature winding part 3 are the same. Although the case has been described, the present invention can be applied even when the polarities of adjacent magnetic poles in a row are different and the polarities of opposing magnetic poles are different.

  10 and 11 are diagrams showing another example of the linear motor according to the first embodiment of the present invention. In the linear motor of FIGS. 10 and 11, the permanent magnets 21 of the field part 2 are arranged so that the polarities of the adjacent magnetic poles are different and the polarities of the magnetic poles facing the armature winding part 3 are also different. Yes. The armature winding part 3 in FIG. 10 is formed by arranging wound armature coils (air core coils) 34 in the column direction, and the armature winding part 3 in FIG. The electric coils 36 are formed side by side in the column direction.

  FIGS. 12 and 13 are diagrams showing a first field unit 201 and a second field unit 202 applied to the linear motor of FIGS. 10 and 11.

  As shown in FIG. 12, the first field unit 201 includes a first permanent magnet 211 and a first yoke 221. The first yoke 221 includes a first yoke portion 251 in which the first permanent magnets 211 are arranged in parallel. The first yoke portions 251 and the first notches 241 are alternately disposed in both rows of the first yokes 221 where the first permanent magnets 211 are disposed. Furthermore, the magnetization directions of the first permanent magnets 211 installed in the first yoke portion 251 are aligned in the same direction in both rows.

  As shown in FIG. 13, the second field unit 202 includes a second permanent magnet 212 and a second yoke 222. The second yoke 222 includes a second yoke portion 252 in which the second permanent magnet 212 is arranged in parallel. The second yoke portions 252 and the second notches 242 are alternately disposed in both rows of the second yoke 222 where the second permanent magnet 212 is disposed. Furthermore, the direction of magnetization of the second permanent magnet 212 installed in the second yoke portion 252 is aligned in the opposite direction to the first permanent magnet 211 in both rows.

  That is, if the first field unit 201 and the second field unit 202 are configured as shown in FIGS. 12 and 13, the field portion 2 of the linear motor of the type shown in FIGS. can do.

  In the type of linear motor shown in FIG. 2, the magnetic flux generated from one N-pole magnet passes through the center of the armature winding portion 3 to the adjacent S-pole magnet, as shown in FIG. It is called an axial magnetic flux type. In addition, as shown in FIG. 14 (b), the linear motor of the type shown in FIGS. 10 and 11 has an S pole magnet in which the magnetic flux generated from one N pole magnet passes through the armature winding portion 3 and faces each other. It returns to the original N-pole magnet via the adjacent N-pole magnet, armature winding portion 3 and opposing S-pole magnet, and is called a transverse magnetic flux type.

  Further, in addition to the linear motors of the types shown in FIGS. 2, 10 and 11, as shown in FIG. 15, the permanent magnets 21 provided with the yokes 22 of the field portion 2 are arranged at a predetermined pitch (in two rows). For example, there is a type of linear motor that is shifted by 1/2 pitch. Also in this case, the same effect can be obtained by applying the first and second field yokes described in the above description.

  Further, the width of the permanent magnets 21 disposed on the yoke 22 may not be the same as the width of the yoke portion, and the adjacent permanent magnets 21 may have a gap as shown in FIG.

  Further, in the linear motor of the present embodiment described above, either the armature winding part or the field part may be a mover or a stator, and can be arbitrarily selected. Furthermore, items other than those described above, for example, the number of permanent magnets arranged, the method of manufacturing the armature winding portion, and the like are not limited at all.

Embodiment 2. FIG.
FIG. 17 is a diagram showing a linear motor according to Embodiment 2 of the present invention. The linear motor shown in FIG. 17 includes a field portion 1002 in which a plurality of permanent magnets 1021 are fixed to a yoke 1022 in one row, and an armature winding in which the row of permanent magnets 1021 is arranged via an air gap 1004. A line portion 1003 is provided.

  FIG. 18 is a perspective view showing a first field unit 1201 according to this embodiment, and FIG. 19 is a perspective view showing a second field unit 1202 according to this embodiment. FIG. 20 is a perspective view showing a state in which the first field unit 1201 in FIG. 18 and the second field unit 1202 in FIG. 19 are combined.

  As shown in FIGS. 18 to 20, the field unit 1002 of the linear motor of the present embodiment is divided into a first field unit 1201 and a second field unit 1202, and is shown in FIG. 17. As described above, the frame 1023 is bonded and fixed to the outer side surfaces of the first and second field units 1201 and 1202 in FIG.

  As shown in FIG. 18, the first field unit 1201 includes a first permanent magnet 1211 and a first yoke 1221. The first yoke 1221 has a first yoke portion 1251 in which the first permanent magnet 1211 is disposed. In addition, in the row direction of the first yoke 1221, the first yoke portions 1251 and the first notches 1241 are alternately arranged. The first yoke portion 1251 is provided with a first permanent magnet 1211 having an N pole magnetized on the surface facing the armature winding portion. That is, in the first field unit 1201, the magnetization directions of the first permanent magnets 1211 installed in the first yoke portion 1251 are aligned in the same direction.

  As shown in FIG. 19, the second field unit 1202 includes a second permanent magnet 1212 and a second yoke 1222. The second yoke 1222 has a second yoke portion 1252 in which the second permanent magnet 1212 is disposed. Further, in the row direction of the second yoke 1222, the second yoke portions 1252 and the second notches 1242 are alternately arranged. The second yoke portion 1252 is provided with a second permanent magnet 1212 having an S pole magnetized on the inner surface facing the armature winding portion. That is, in the second field unit 1202, the magnetization direction of the second permanent magnet 1212 installed in the second yoke portion 1252 is opposite to the magnetization direction of the first permanent magnet 1211. Are aligned in the direction.

  Although the polarities of the first and second permanent magnets 1211, 1212 are shown in the figure, the first and second permanent magnets 1211, 1212 are fixed to the first and second yokes 1221, 1222. At that time, all the permanent magnets are not magnetized.

  Then, the first and second field units 1201 and 1202 are arranged on the table 503 provided inside the cylinder 502 shown in FIG. At this time, the first and second field units 1201 and 1202 are arranged so that the first and second permanent magnets 1211 and 1212 are magnetized in a predetermined direction. Then, by passing a current through the coil 501 of the air-core coil 5, a uniform magnetic field is applied to the inside of the cylinder 502 so that the magnetic poles of the first and second permanent magnets 1211 and 1212 are aligned in the magnetization direction. Become. After that, as shown in FIG. 20, the first and second field unit 1201 and 1202 are overlapped and connected so that the yoke portions 1251 and 1252 are located in the notches 1242 and 1241, respectively. .

  As described above, according to the present embodiment, the permanent magnet 1021 (first permanent magnet 1211, second permanent magnet 1212) is not magnetized and the yoke 1022 (first yoke 1221, second permanent magnet) is not magnetized. The permanent magnet 1021 (first permanent magnet 1211, second permanent magnet 1212) can be easily disposed on the yoke 1022 (first yoke 1221, second yoke 1222). , Productivity is increased. Further, it is possible to prevent the permanent magnet 1021 (the first permanent magnet 1211 and the second permanent magnet 1212) from being cracked or chipped, and to improve product reliability. Further, after the permanent magnet 1021 (first permanent magnet 1211, second permanent magnet 1212) is fixed to the yoke 1022 (first yoke 1221, second yoke 1222), the permanent magnet can be formed at once by the air-core coil 5. 1021 (the first permanent magnet 1211 and the second permanent magnet 1212) can be magnetized, and the magnetizing operation can be facilitated.

  In the present embodiment, the width of the permanent magnet 1021 disposed in the yoke 1022 may not be the same as the width of the yoke portion, and a gap may be provided between adjacent permanent magnets 1021.

  Further, in the linear motor of the present embodiment described above, either the armature winding part or the field part may be a mover or a stator, and can be arbitrarily selected. Furthermore, items other than those described above, for example, the number of permanent magnets arranged, the method of manufacturing the armature winding portion, and the like are not limited at all.

Embodiment 3 FIG.
21 is a perspective view showing a field portion of a linear motor according to Embodiment 3 of the present invention, and FIG. 22 is a perspective view showing a state in which the field portion of the linear motor shown in FIG. 21 is magnetized.

  As shown in FIG. 21, in the linear motor of the present embodiment, a plurality of permanent magnets 3021 are arranged in two rows, and the two rows of permanent magnets 3021 are arranged on the yoke 3022 so as to face each other at a predetermined interval. And an armature winding portion (not shown) disposed at a predetermined interval between the two rows of permanent magnets 3021 via an air gap.

  In the field part 3002 of the linear motor of the present embodiment, the fixed yoke part 3271 and the movable yoke part 3272 in which the permanent magnets 3021 are respectively arranged in two rows in which the permanent magnets 3021 of the yoke 3022 are arranged. Are alternately provided in the column direction. The movable yoke portion 3272 is attached to the field magnet portion 3002 so that the armature winding side surface on which the permanent magnet 3021 is disposed rotates at least 180 degrees. Furthermore, the direction of magnetization of the permanent magnet 3021 installed in the fixed yoke portion 3271 is aligned in the same direction, and the direction of magnetization of the permanent magnet 3021 installed in the movable yoke portion 3272 is the same direction. They are aligned in the opposite direction.

  More specifically, the yoke 3022 of the field magnet portion 3002 of this embodiment is divided into a fixed yoke portion 3271 and a movable yoke portion 3272, and the support portion 3273 of the fixed yoke portion 3271 is notched 3274. Are provided alternately on the left and right, and the movable yoke portion 3272 can be disposed. And it connects by inserting the pin 3275 in the hole provided in the bending part 3276 of the fixed yoke part 3271 and the movable yoke part 3272. When the permanent magnet 3021 is magnetized, the movable yoke portion 3272 is rotated 180 degrees from the state of FIG. 21 to the state of FIG. 22, thereby being fixed to the fixed yoke portion 3271 and the movable yoke portion 3272. The directions of magnetization of the permanent magnet 3021 are all aligned in the direction of arrow C. And it can magnetize at once in the air-core coil shown in FIG. After the permanent magnet 3021 is magnetized, the movable yoke portion 3272 is rotated in the direction opposite to the above to return to the original state, thereby creating the field portion 3002 of the linear motor of the present embodiment shown in FIG. be able to.

  As in the first embodiment, the strength can be increased by, for example, connecting and fixing a magnetic material frame around the field part 3002 by bonding or the like.

  Further, in the present embodiment, description will be given using an arrangement in which permanent magnets 3021 of a linear motor field portion 3002 have the same polarity of magnetic poles facing each other across the armature winding portion. However, as in the above-described embodiment, even when the polarities of the opposing magnetic poles are different, the permanent magnet 3021 can be magnetized by the same method if the field part 3002 is configured as shown in FIG.

  Further, in the present embodiment, the width of the permanent magnet 3021 disposed on the yoke 3022 may not be the same as the width of the yoke portion, and a gap may be provided between adjacent permanent magnets 3021.

  In the linear motor of this embodiment described above, either the armature winding portion or the field portion may be a mover or a stator, and can be arbitrarily selected. Furthermore, items other than those described above, such as the number of permanent magnets arranged, the interval between the magnets, and the method of manufacturing the armature winding part, are not limited at all.

  As described above, according to the present embodiment, since the permanent magnet 3021 can be bonded to the yoke 3022 in a non-magnetized state, the work of disposing the permanent magnet 3021 on the yoke 3022 is facilitated, and productivity can be improved. . Further, the permanent magnet 3021 can be prevented from cracking and chipping, and the product reliability can be improved. Further, after the permanent magnet 3021 is fixed, the permanent magnet 3021 can be magnetized at once by the air-core coil 5 shown in FIG. 9 and the magnetizing work can be facilitated. Further, the movable yoke part 3272 can be assembled simply by rotating, and the work is easy and the productivity is good.

Embodiment 4 FIG.
24 is a perspective view showing a field portion of a linear motor according to Embodiment 4 of the present invention, and FIG. 25 is a perspective view showing a state in which the field portion of the linear motor shown in FIG. 24 is magnetized.

  As shown in FIG. 24, in the linear motor of the present embodiment, a field portion 4002 in which a plurality of permanent magnets 4021 are arranged in a row on a yoke 4022, and a row of permanent magnets 4021 via an air gap. Armature windings (not shown).

  The yoke 4022 of the field magnet portion 4002 according to the present embodiment is alternately provided with a fixed yoke portion 4271 and a movable yoke portion 4272 in which the permanent magnets 4021 are respectively arranged in the column direction. Movable yoke portion 4272 is attached to yoke 4022 of field portion 4002 via pin 4275 or the like so that the armature winding side surface on which permanent magnet 4021 is disposed rotates at least 180 degrees. And the direction of the magnetization of the permanent magnet 4021 installed in the fixed yoke part 4271 is aligned in the same direction, and the direction of the magnetization of the permanent magnet 4021 installed in the movable yoke part 4272 is the same direction. They are aligned in the opposite direction.

  When the permanent magnet 4021 is magnetized, the movable yoke portion 4272 is rotated 180 degrees from the state shown in FIG. 24 to be in the state shown in FIG. 25, thereby being fixed to the fixed yoke portion 4271 and the movable yoke portion 4272. The directions of magnetization of the permanent magnet 4021 are all aligned in the direction of arrow C. And it can magnetize at once in the air-core coil 5 shown in FIG. After the permanent magnet 4021 is magnetized, the field portion of the linear motor of the present embodiment shown in FIG. 24 is created by rotating the movable yoke portion 4272 in the opposite direction to the original state. Can do.

  In the present embodiment, the width of the permanent magnet 4021 disposed on the yoke 4022 may not be the same as the width of the yoke portion, and a gap may be provided between adjacent permanent magnets 4021.

  Further, in the linear motor of the present embodiment described above, either the armature winding part or the field part may be a mover or a stator, and can be arbitrarily selected. Furthermore, items other than those described above, for example, the number of permanent magnets arranged, the method of manufacturing the armature winding portion, and the like are not limited at all.

  As described above, according to the present embodiment, since the permanent magnet 4021 can be bonded to the yoke 4022 in a non-magnetized state, the work of disposing the permanent magnet 4021 on the yoke 4022 is facilitated and productivity is increased. . Further, the permanent magnet 4021 can be prevented from cracking and chipping, and the product reliability can be improved. Further, after the permanent magnet 4021 is fixed, the permanent magnet 4021 can be magnetized at once by the air-core coil 5 or the like shown in FIG. 9, and the magnetizing operation can be facilitated. Further, the movable yoke part 4272 can be assembled simply by rotating, and the work is easy and the productivity is improved.

  The linear motor according to the present invention is used for conveying means such as a semiconductor manufacturing apparatus and a machine tool.

1 is an overall perspective view showing a linear motor according to Embodiment 1 of the present invention. It is the figure which looked at the linear motor of FIG. 1 from the arrow A direction. It is a perspective view which shows the field part of the linear motor of FIG. It is a perspective view which shows the 1st field unit used for the linear motor of FIG. It is the figure which looked at the 1st field unit of Drawing 4 from arrow A direction. It is a perspective view which shows the 2nd field unit used for the linear motor of FIG. It is the figure which looked at the 2nd field unit of Drawing 6 from arrow A direction. It is the perspective view which showed a mode that the field part was comprised combining the 1st and 2nd field unit by Embodiment 1 of this invention. It is a figure explaining the method of magnetizing the 1st and 2nd field unit, and is a figure showing the 1st and 2nd field unit arrange | positioned in an air-core coil. It is a figure which shows the other example of the linear motor by Embodiment 1 of this invention. It is a figure which shows the other example of the linear motor by Embodiment 1 of this invention. It is a figure which shows the 1st field magnet unit used for the linear motor of FIG.10 and FIG.11. It is a figure which shows the 2nd field unit used for the linear motor of FIG.10 and FIG.11. It is a figure which shows how the magnetic flux of the linear motor of FIG. 2, FIG. 10, and FIG. 11 passes. It is a figure which shows the other example of the linear motor by Embodiment 1 of this invention. It is a figure which shows the other example of the linear motor by Embodiment 1 of this invention. It is a figure which shows the linear motor by Embodiment 2 of this invention. FIG. 6 is a perspective view showing a first field unit according to a second embodiment. It is a perspective view which shows the 2nd field unit by Embodiment 2. FIG. FIG. 20 is a perspective view showing a state in which the first field unit of FIG. 18 and the second field unit of FIG. 19 are combined. It is a perspective view which shows the field part of the linear motor by Embodiment 3 of this invention. It is a perspective view which shows a mode that it magnetizes to the field part of the linear motor of FIG. It is a perspective view which shows the other example of the field part of the linear motor by Embodiment 3 of this invention. It is a perspective view which shows the field part of the linear motor by Embodiment 4 of this invention. It is a perspective view which shows a mode that it magnetizes to the field part of the linear motor of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Linear motor, 2,1002,3002,4002 Field part, 3 Armature winding part, 4,1004 Air gap, 21,1021, 3021, 4021 Permanent magnet,
22, 1022, 3022, 4022 yoke, 23, 1023 frame,
201, 1201 first field unit, 202, 1202 second field unit,
211, 1211 first permanent magnet, 221, 1221 first yoke,
241, 1241 First yoke notch, 251, 1251 First yoke yoke,
212, 1212 second permanent magnet, 222, 1222 second yoke,
242, 1242 Second yoke notch, 252, 1252 Second yoke yoke part, 3271, 4271 Fixed yoke part, 3272, 4272 Movable yoke part.

Claims (5)

A plurality of permanent magnets are arranged in two rows, and a field portion formed on the yoke so that the two rows of permanent magnets face each other at a predetermined interval, and an air gap at a predetermined interval between the two rows of permanent magnets In a linear motor provided with an armature winding portion disposed via
The field part is divided and configured by a first field unit and a second field unit,
The first field unit has a first yoke portion in which the first permanent magnets are installed in two rows, and a first notch disposed between the first yoke portions. ,
The second field unit has a second yoke portion in which the second permanent magnets are installed in two rows, and a second notch disposed between the second yoke portions. ,
The first and second field units are connected such that the first yoke portion is located in the second notch and the second yoke portion is located in the first notch,
The magnetization directions of the first permanent magnets installed in the first yoke part are aligned in the same direction, and the magnetization directions of the second permanent magnets installed in the second yoke part are A linear motor characterized by being aligned in the opposite direction to the same direction. In a linear motor comprising a field portion in which a plurality of permanent magnets are arranged in a row on a yoke, and an armature winding portion arranged in the row of permanent magnets through an air gap
The field part is divided and configured by a first field unit and a second field unit,
The first field unit has a first yoke part in which the first permanent magnets are installed in a row, and a first notch disposed between the first yoke parts. ,
The second field unit has a second yoke portion in which the second permanent magnets are installed in a row, and a second notch disposed between the second yoke portions. ,
The first and second field units are coupled such that the first yoke portion is located in the second notch and the second yoke portion is located in the first notch,
The magnetization directions of the first permanent magnets installed in the first yoke part are aligned in the same direction, and the magnetization directions of the second permanent magnets installed in the second yoke part are A linear motor characterized by being aligned in the opposite direction to the same direction. A plurality of permanent magnets are arranged in two rows, and a field portion formed on the yoke so that the two rows of permanent magnets face each other at a predetermined interval, and an air gap at a predetermined interval between the two rows of permanent magnets In a linear motor provided with an armature winding portion disposed via
In the two rows in which the permanent magnets of the yoke of the field magnet portion are disposed, fixed yoke portions and movable yoke portions in which the permanent magnets are respectively disposed are alternately provided in the row direction,
The movable yoke portion is rotatably provided on the field portion such that the armature winding side surface on which the permanent magnet is disposed faces at least 180 degrees in the opposite direction,
The directions of magnetization of the permanent magnets installed in the fixed yoke portion are aligned in the same direction, and the directions of magnetization of the permanent magnets installed in the movable yoke portion are opposite to the same direction. Linear motor characterized by being aligned in the direction. In a linear motor comprising a field portion in which a plurality of permanent magnets are arranged in a row on a yoke, and an armature winding portion arranged in the row of permanent magnets through an air gap,
The yoke of the field part is alternately provided with a fixed yoke part and a movable yoke part in which the permanent magnets are respectively arranged in a row direction,
The movable yoke portion is rotatably provided on the field portion such that the armature winding side surface on which the permanent magnet is disposed faces at least 180 degrees in the opposite direction,
The directions of magnetization of the permanent magnets installed in the fixed yoke portion are aligned in the same direction, and the directions of magnetization of the permanent magnets installed in the movable yoke portion are opposite to the same direction. Linear motor characterized by being aligned in the direction. The linear motor according to any one of claims 1 to 4, wherein at least an outer side surface of the field magnet part is fixed by a frame.

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