WO1999041825A1 - Moteur lineaire - Google Patents
Moteur lineaire Download PDFInfo
- Publication number
- WO1999041825A1 WO1999041825A1 PCT/JP1999/000627 JP9900627W WO9941825A1 WO 1999041825 A1 WO1999041825 A1 WO 1999041825A1 JP 9900627 W JP9900627 W JP 9900627W WO 9941825 A1 WO9941825 A1 WO 9941825A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- phase
- phase band
- block core
- block
- band
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
- H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
- H02K1/148—Sectional cores
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
Definitions
- the present invention relates to a moving coil type linear motor used for table feeding of a machine tool or the like.
- the conventional moving coil type linear motor has a field permanent magnet "! 1" mounted on a fixed part and a comb-shaped armature core 12 facing the field magnet. and wound around the armature coils 1 3 was distributed Certificates the armature core, armature core 1 2 of winding the armature coils, the number of phases [pi, the number of field permanent magnet 1 1 [rho If the number of teeth 14 facing each pole is q, then the number of teeth N provided on the armature core 12 is
- N n X p X q
- the three-phase windings U, V, and W of the armature coil 13 are wound around the armature core 12 having the number of teeth at equal intervals by a coil jump having a tooth pitch of at least two or more. are doing.
- the slots at both ends in the mover thrust direction X are located at the center part. Unlike the slot, only one coil is housed, and this slot generates an end effect, and generates one cycle of cogging thrust TC in the pole pitch of the field magnet 11, resulting in thrust Is occurring.
- An object of the present invention is to provide a linear motor that solves such a problem caused by cogging thrust and that improves the detection accuracy of the coil temperature.
- Replacement form (Rule 26)
- the present invention divides the armature core into a plurality of block cores, and includes teeth provided at equal pitches in each block core, armature coils wound in a concentrated winding, and the block cores are mutually connected.
- a gap corresponding to an integral multiple of the electrical angle of 180 ° of the magnet pitch divided by the number of divisions is provided in the direction of the thrust, and the armature coils of the block core sandwiching the gap are mutually connected.
- winding is performed with the phase shifted by an electrical angle corresponding to this gap.
- the phase of the cogging thrust generated by the armature coil of each block core is sequentially generated in each block core with a phase shift at an electrical angle corresponding to the gap.
- the winding can be constituted by a complete three-phase balanced winding, and a temperature sensor can be inserted into the gap between the block cores.
- the armature core is divided into three block cores, each of which is eight times the magnet pitch and has nine teeth at equal pitches, a second block core and a third block core. It has a block core, three blocks of teeth of each block core, and a three-phase armature coil wound in a concentrated winding.A gap of 23 magnet pitches is provided between the block cores in the thrust direction.
- the first block core is arranged such that armature coils are wound in three groups in the order of a U-phase band, a V-phase band, and a W-phase band, and the second block core is a V-phase band in each group.
- Band, W-phase band, and U-phase band, and armature coils are wound in this order.
- the third block core winds armature coils around each group in the order of W-phase band, U-phase band, and V-phase band.
- Each phase coil is three-phase balanced.
- a gap of 1 to 3 of the magnet pitch is provided between the three block cores, and the magnets are arranged in the thrust direction.
- the teeth are divided into three groups. Armature coils are wound in the order of the phase band, the V phase band, and the W phase band, and the second block core is wound in the order of the W phase band, the U phase band, and the V phase band by reversing the winding direction.
- the third block core may be wound with armature coils in the same winding direction as the first block core in each group in the order of V-phase band, W-phase band, and U-phase band. .
- the armature core is divided into two block cores, each of which is eight times the magnet pitch and has nine teeth at equal pitches, and a similar second block core.
- Replacement paper in the direction of thrust with a gap of 12 magnet pitches between each other (Rule 26) Are arranged, the teeth of the first block core are divided into groups of three, and armature coils are wound in the order of U-phase band, V-phase band, W-phase band, and the second block core has one piece.
- the second block core is also divided into three groups, and the magnetomotive force vector is electrically out of phase with the first block core by 120 °.
- the armature core of the moving element is divided into a plurality of block cores and arranged in the direction of thrust, and each block core is arranged at an equal pitch.
- the teeth are divided into groups of the number of phases, and a gap of an integral multiple of the pitch of the magnet divided by the number of divisions is provided between the block cores, and the gap is arranged in the thrust direction.
- the phase is shifted by the electrical angle corresponding to the gap.J.
- the armature coil can be concentratedly wound and wound directly on the teeth, and the cogging thrust generated by the end effect of the mover is applied between the block cores. This has the effect of canceling out to zero, and a highly accurate linear motor can be obtained.
- the mover is made up of three block cores and placed in the direction of thrust with a gap of 2 Z 3 or 1 Z 3 of the magnet pitch, and each block core is made up of 9 teeth 8 times the magnet pitch.
- the mutual armature coils have a phase difference of 90 °, and the same phase cogging thrust is connected in series As a result, the circulating current due to the magnetomotive force phase difference is eliminated, and an efficient linear motor can be obtained.
- Replacement form (Rule 26) By providing a temperature sensor in this gap, the temperature in the middle of the coil can be detected, and the temperature of the coil in the linear motor can be accurately controlled. If resin molding is performed including the temperature sensor in the gap, However, the advantage that the temperature sensor is securely held and the temperature detection accuracy is improved can be obtained.
- the teeth constituting the block core with the engagement protrusions of the yoke portion and the engagement portion, the teeth can be easily punched, and the teeth wound with the coil can be connected. This has the effect of simplifying the winding operation.
- FIG. 1 is a side sectional view showing a first embodiment of the present invention.
- 2A and 2B are explanatory diagrams of the winding in the first embodiment, in which FIG. 2A is a connection diagram, and FIG. 2B is a winding layout diagram.
- FIG. 3 is a characteristic diagram illustrating a state of the cogging thrust according to the first embodiment.
- FIG. 4 is a side sectional view showing the second embodiment.
- FIGS. 5A and 5B are explanatory diagrams of the winding in the second embodiment.
- FIG. 5A is a connection diagram
- FIG. 6 is a characteristic diagram showing the state of the cogging thrust according to the second embodiment.
- FIG. 7 is a side sectional view showing a third embodiment.
- FIG. 8A and 8B are explanatory diagrams of windings in the third embodiment.
- FIG. 8A is a connection diagram
- FIG. 8B is a winding layout diagram.
- FIG. 9 is a characteristic diagram showing a state of cogging thrust according to the third embodiment.
- FIG. 10 is a vector diagram of each phase in the third embodiment.
- FIGS. 11A and 11B are explanatory diagrams of a winding showing a modification of the third embodiment.
- FIG. 11A is a connection diagram
- FIG. 11B is a winding arrangement diagram.
- FIG. "I2 is a side sectional view showing the fifth embodiment.
- FIG. 13 is an explanatory view of a winding in the fifth embodiment, (a) is a connection diagram, and (b) is a winding diagram.
- Fig. 14 is a side sectional view showing a sixth embodiment
- Fig. 15 is an explanatory diagram of a winding in the sixth embodiment
- (a) is a connection diagram.
- Fig. 16 is a side sectional view showing a seventh embodiment
- Fig. 16 is a side sectional view showing a seventh embodiment.
- Fig. 18 is a winding arrangement diagram in the seventh embodiment
- Fig. 19 is a winding arrangement diagram in the seventh embodiment
- Fig. 20 is a front sectional view showing the eighth embodiment.
- Fig. 21 is a partial side sectional view showing a ninth embodiment
- Fig. 22 is a side sectional view showing a conventional example and a characteristic diagram showing a state of cogging thrust.
- FIG. 1 shows a first embodiment of the present invention.
- Reference numeral 1 denotes a field magnet attached to a fixed part 2 at an equal pitch Pm, and a mover 3 moving in opposition to the field magnet 1.
- the length is set to match the length of the mover and the stroke of the mover.
- the core provided on the mover 3 is divided into a first block core 31, a second block core 32, and a third block core 33 and attached in the moving direction.
- Each of the block cores 3 1, 3 2, 3 3 has a length eight times the pitch Pm of the field magnet 1 and is provided with nine teeth 4 at the same pitch Pt.
- Each group is divided into three groups, and the armature coils 5 of each phase wound directly on each group are wound in a concentrated winding.
- Numeral 6 is a spacing piece inserted between the block cores, which has a width of 2Z 3 times the pitch Pm of the field magnet 1, and is preferably made of a non-magnetic material.
- the first block core 31 is connected to each of the groups as shown in the connection diagram in Fig. 2 (a).
- Teeth 4 has a coil 5 in the order of U-phase band, V-phase band, and W-phase band.
- the second block core 32 is displaced from the first block core 31 in the thrust direction by 23 3 of the magnet pitch Pm in the direction of the thrust by the spacing piece 6, and the pit pitch Pm is an electrical angle of 180. °, the electric angle is shifted by “! 20 °”, and the armature coil of this block core also has a phase shift of 120 ° with respect to the armature coil of the first block core 31. Therefore, the armature coils 5 are provided in the order of the V-phase band, the W-phase band, and the U-phase band from the end on the same side as the first block core.
- the armature coil 5 of the third block core 33 is also shifted by 120 ° in electrical angle from the second block core 32, so that the W-phase band, the U-phase band, and the V-phase band are shifted. It is wound in the order of the belt.
- each block core of the mover 3 is such that the block cores 31, 32, 33 mutually In this case, the armature coils of each block core are wound around each other with a phase difference of 12 CT in electrical angle.
- the cogging thrusts TC1, TC2, and TC3 generated by the end effect generate a phase difference of 120 ° as shown in Fig. 3, and their sum can be reduced to zero.
- FIG. 4 is a side sectional view showing the second embodiment, in which the same reference numerals are assigned to the same parts as in the first embodiment, and the core of the mover 3 is divided into three block cores.
- Each of the block cores 31, 32, and 33 has a width of 13 times the pitch Pm of the field magnet 1 and is chain-coupled across the spacing piece 6a. It has eight times the length and has nine teeth 4 with equal pitch Pt, and each tooth 4 is grouped into three.
- the tooth positions on the same side end of each block core are shifted by 1 Z3 of the magnet pitch Pm across the spacing piece 6a between the block cores, and the magnet pitch Pm is 180 electrical degrees. °, so the electrical angle deviates by 60 °.
- the first block core 31 directly inserts U-phase, V-phase, and W-phase band coils into slots in each group sequentially from the end.
- the armature coil of the second block core 32 is wound with the winding direction reversed in the order of W-phase band, U-phase band, and V-phase band in order to shift the phase by 60 ° in electrical angle.
- the third block core 33 is wound in the same direction as the coil of the first block core in the order of V-phase band, W-phase band, and U-phase band in order to make the phase difference of 60 ° with the second block core. I do.
- the winding arrangement of each block core in this state is shown in Fig. 5 (b).
- the cogging thrusts TC1, TC2, and TC3 generated by the end effect of each block core generate a phase difference of 60 ° as shown in Fig. 6, and the sum can be made zero.
- Fig. 7 is a sectional side view showing the third embodiment, where 1 is a field magnet, 2 is a fixed part, and 3 is a replaceable sheet (Rule 26).
- 1 is a field magnet
- 2 is a fixed part
- 3 is a replaceable sheet (Rule 26).
- two block cores 31 and 32 each of which is provided with nine wires at an equal pitch in a length corresponding to eight magnet pitches Pm of the field magnet "! It is provided with a spacing piece 6 b having a width of Pm 12.
- the first block core 31 divides the nine teeth 4 into three groups and sequentially arranges the armature coils 5 in the U-phase band, the V-phase band, and the W-phase band.
- the second block core 32 winds one coil of the V-phase band around the first tooth, the coil of the W-phase band around the next three teeth, and the next three teeth.
- the armature coils 5 between the block cores are three-phase balanced with a 90 ° phase difference.
- the windings can be used to maximize the flux linkage.
- each of the block cores 31 and 32 is as shown in FIG. 8B, and as shown in FIG. 9, the end effect of the first block core 31 and the second block core 32 is obtained.
- the cogging thrusts TCI and TC2 generated by the fruits can cancel each other.
- FIG. 11 is a winding arrangement diagram showing the fourth embodiment, and shows a coil arrangement and a coil connection method shown in FIG. 8 (a modification example of this).
- the first block core 31 divides the nine teeth 4 into three groups and sequentially arranges U-phase, V-phase, and W-phase armature coils.
- the second block core 32 divides the nine teeth into three groups and arranges the armature coils in the order of V-phase band, W-phase band, and U-phase band.
- the armature coil 5 between the block cores can be formed into a three-phase balanced winding with a phase difference of 90 °.
- each block core 31 and 32 becomes as shown in Fig. 11 (b).
- the cogging thrusts TC1 and TC2 generated by the effect can cancel each other.
- the phase of the magnetomotive force vector generated in the element is vector-combined, and circulating current can be eliminated.
- FIG. 12 shows a fifth embodiment of the present invention, which is a preferred example when it is necessary to increase the required dimensions of a linear motor.
- reference numeral 1 denotes a field magnet attached to the fixed part 2 at an equal pitch Pm, and has a length corresponding to the length of the mover 3 moving in opposition to the field magnet 1 and the stroke of the mover movement. Are located.
- the core provided on the mover 3 is divided into a first block core 31, a second block core 32, and a third block core 33, and attached in the moving direction.
- Each of the block cores 3 1 and 3 3 has a length eight times the pitch Pm of the field magnet 1 and is provided with nine teeth 4 at an equal pitch Pt, and three teeth 4 each.
- And armature coils 5 of each phase wound directly around each group are wound in a concentrated winding.
- the block core 32 has a length twice as long as the block cores 31 and 33 (16 times the pitch Pm), and is provided with 18 teeth 4 at an equal pitch Pt.
- Each group is divided into three groups, and the armature coils 5 of each phase wound directly around each group are wound in a concentrated winding.
- the inserted spacing piece has a width two to three times the pitch Pm of the field magnet 1, and is preferably made of a non-magnetic material.
- the first block core 31 is connected to the teeth 4 of each group as shown in the connection diagram in Fig. 13 (a). It has a coil 5 in the order of U-phase band, V-phase band and W-phase band.
- the second block core 32 has a thrust direction replacement sheet with respect to the first block core 31 (Rule 26). P 9/00627
- the magnet pitch Pm is shifted by 2 to 3 by the spacing piece 6 in Fig. 9 and the magnet pitch Pm is 180 ° in electrical angle, so it must be shifted by 120 ° in electrical angle. Since the sub coil also has a phase shift of 120 ° with respect to the armature coil of the first block core 31, the V phase band, the W phase band, and the U phase band from the same end as the first block core. The sequence is repeated twice to provide armature coil 5.
- the armature coil 5 of the third block core 33 is shifted from the second block core 32 by an electrical angle of 120 °, and the W-phase band, the U-phase band, and the V-phase band are sequentially shifted. Wound in. Therefore, the opposing position of each phase coil and the magnet is the same as in the case where the phase is not shifted, and the flux linkage is maximized.
- the coil arrangement of each block core of the mover 3 is such that the block cores 31, 32, and 33 are mutually connected and the pitch Pm of the field magnet 1 (Electrical angle is 120 °) and the armature coils of each block core are wound with a phase difference of 120 ° in electrical angle.
- the cogging thrusts TC1, TC2, and TC3 generated by the end effect of the block core generate a phase difference of “I 20 °, as shown in FIG. can do.
- the second block core 32 and the third block core 33 switch between the V-phase band and the W-phase band. Will be.
- FIG. 14 is a side sectional view showing the sixth embodiment, in which the core of the mover 3 is divided into three block cores and has a width of 1 Z3 times the pitch Pm of the field magnet 1 and a spacing piece.
- the block cores 31 and 33 have a length eight times the pitch Pm of the field magnet 1 and are provided with nine teeth 4 at an equal pitch Pt.
- Sources 4 are in groups of three each.
- the block core 32 is twice as long as the block cores 31 and 33 (16 times the pitch Pm) as in the fifth embodiment.
- the first block core 31 is connected to the U-phase, V-phase, and W-phase
- the coils are directly wound, and the armature coils of the second block core 32 are reversed in winding direction in the order of W-phase band, U-phase band, and V-phase band to shift the phase by 60 ° in electrical angle.
- It is wound twice and the third block core 33 has a phase difference of 60 ° from the second block core 32. , W phase band, U phase band in order.
- the winding arrangement of each block core in this state is shown in FIG. 15 (b).
- the cogging thrusts TC1, C2, and TC3 generated by the end effect of each block core generate a 60 ° phase difference as shown in FIG. The sum can be set to 0.
- the second block core 32 and the third block core 33 receive the V-phase band and the W-phase band. Will be replaced.
- FIG. 16 and 1F show a seventh embodiment in which a temperature sensor for controlling the coil temperature is provided.
- the mover 3 has a plurality of (three in the figure) block cores 31 and 3. It is divided into 2 and 3 and a gap of 23 of the pitch Pm of the field magnet 1 is provided between each block core, and the spacing piece 6 is inserted.
- the coils 51 and 5 on both sides sandwiching this gap A temperature sensor such as a thermistor or a thermal protector is inserted between 2 and filled with resin mold 8.
- FIG. 16 is directed to the first to fourth embodiments
- FIG. 1F is directed to the fifth and sixth embodiments.
- the temperature sensor 7 can detect the temperature of the armature coil 5 not at the coil end but at the coil middle where the coil temperature becomes high, and the temperature and temperature of the teeth 4 and the armature coil 5 can be determined. Coil temperature can be reliably detected without any influence.
- the temperature sensor 7 is inserted between the W phase and the V phase and between the U phase and the W phase.
- the average coil temperature can be detected.
- the temperature sensor 7 can be attached to the gap by bonding, etc. By inserting between the coils and filling it with the resin mold 8, it is possible to ensure the holding and improve the detection accuracy by improving the guidance from the coils 51 and 52. In this case, the entire iron core may be molded.
- the armature coil 5 is provided on one side of the mover 3 so that the armature coil 5 is opposed to the field 1.
- each armature coil is implemented in the same manner. can do.
- One is a coolant passage for cooling.
- the block core of each of the embodiments described above is shown as being integrated with a comb-shaped iron core, but as shown in FIG. 21, an engagement protrusion 42 is formed on one side of the yoke portion 41. If the laminated plates provided with mating portions 43 engaging with the engaging projections on the opposite side are sequentially fitted and connected and fixed, the shape of the teeth 4 is reduced to facilitate punching. In addition, since the coil 4 wound around the teeth 4 stacked in advance can be connected, there is an advantage that the winding can be facilitated.
- the present invention can be applied to the block core having the teeth 4 on both sides shown in the eighth embodiment.
- the present invention is applicable to the field of manufacturing and providing a linear motor having improved coil temperature detection accuracy by applying the present invention to a moving coil type linear motor used for a movable transmission of a machine tool.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- Linear Motors (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/601,900 US6476524B1 (en) | 1998-02-13 | 1999-02-12 | Linear motor |
EP99903916A EP1056187A4 (en) | 1998-02-13 | 1999-02-12 | LINEAR MOTOR |
JP51303899A JP3852117B2 (ja) | 1998-02-13 | 1999-02-12 | リニアモータ |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/48719 | 1998-02-13 | ||
JP4871998 | 1998-02-13 | ||
JP36517498 | 1998-12-22 | ||
JP10/365174 | 1998-12-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999041825A1 true WO1999041825A1 (fr) | 1999-08-19 |
Family
ID=26389026
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/000627 WO1999041825A1 (fr) | 1998-02-13 | 1999-02-12 | Moteur lineaire |
Country Status (4)
Country | Link |
---|---|
US (1) | US6476524B1 (ja) |
EP (1) | EP1056187A4 (ja) |
JP (1) | JP3852117B2 (ja) |
WO (1) | WO1999041825A1 (ja) |
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JP6527196B2 (ja) * | 2017-06-19 | 2019-06-05 | ファナック株式会社 | リニアモータ |
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JP2002101636A (ja) * | 2000-09-20 | 2002-04-05 | Yaskawa Electric Corp | リニアモータ |
US7291941B2 (en) | 2002-10-08 | 2007-11-06 | Kabushiki Kaisha Yasakawa Denki | Tandem arrangement linear motor |
WO2004034556A1 (ja) * | 2002-10-08 | 2004-04-22 | Kabushiki Kaisha Yaskawa Denki | 直列配置リニアモータ |
KR100983764B1 (ko) * | 2002-10-08 | 2010-09-24 | 가부시키가이샤 야스카와덴키 | 직렬 배치 리니어 모터 |
JP2005295678A (ja) * | 2004-03-31 | 2005-10-20 | Yaskawa Electric Corp | リニアドライブシステム |
EP1615323A1 (en) | 2004-07-06 | 2006-01-11 | Fanuc Ltd | Linear driving device |
JP2006129546A (ja) * | 2004-10-26 | 2006-05-18 | Yaskawa Electric Corp | ムービングコイル形リニアモータ |
JP4577491B2 (ja) * | 2004-10-26 | 2010-11-10 | 株式会社安川電機 | ムービングコイル形リニアモータ |
JP2007143216A (ja) * | 2005-11-15 | 2007-06-07 | Yaskawa Electric Corp | リニアモータ |
JP4711182B2 (ja) * | 2005-11-15 | 2011-06-29 | 株式会社安川電機 | リニアモータ電機子およびリニアモータ |
KR101865354B1 (ko) * | 2011-07-13 | 2018-06-07 | 주식회사 코베리 | 전동기 |
WO2015136759A1 (ja) * | 2014-03-12 | 2015-09-17 | 独立行政法人国立高等専門学校機構 | リニアモータ |
JP2015173577A (ja) * | 2014-03-12 | 2015-10-01 | 独立行政法人国立高等専門学校機構 | リニアモータ |
KR20190090371A (ko) * | 2016-12-23 | 2019-08-01 | 한국전기연구원 | 디텐트력 저감을 위한 영구자석 전기기기 |
KR102401588B1 (ko) * | 2016-12-23 | 2022-05-25 | 한국전기연구원 | 디텐트력 저감을 위한 영구자석 전기기기 |
Also Published As
Publication number | Publication date |
---|---|
US6476524B1 (en) | 2002-11-05 |
EP1056187A1 (en) | 2000-11-29 |
EP1056187A4 (en) | 2005-11-02 |
JP3852117B2 (ja) | 2006-11-29 |
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