WO2007111031A1 - Dispositif de commande de moteur et d'entraînement - Google Patents

Dispositif de commande de moteur et d'entraînement Download PDF

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Publication number
WO2007111031A1
WO2007111031A1 PCT/JP2007/050707 JP2007050707W WO2007111031A1 WO 2007111031 A1 WO2007111031 A1 WO 2007111031A1 JP 2007050707 W JP2007050707 W JP 2007050707W WO 2007111031 A1 WO2007111031 A1 WO 2007111031A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
motor
bearing
stator
energizing
Prior art date
Application number
PCT/JP2007/050707
Other languages
English (en)
Japanese (ja)
Inventor
Hiroshi Koyama
Hirohumi Doi
Kenta Hatano
Tomokuni Katou
Original Assignee
Mitsubishi Electric Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corporation filed Critical Mitsubishi Electric Corporation
Priority to JP2008507380A priority Critical patent/JP5306808B2/ja
Priority to CN2007800101693A priority patent/CN101405929B/zh
Priority to DE112007000576T priority patent/DE112007000576T5/de
Publication of WO2007111031A1 publication Critical patent/WO2007111031A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor

Definitions

  • the present invention relates to a motor and a drive control device thereof.
  • Patent Document 1 discloses a conventional noise countermeasure technique for driving a motor.
  • Patent Document 1 reduces noise generated when a member attached to a rotor shaft collides with a bearing when the rotor of a DC (direct current) motor moves in the axial direction during driving.
  • Patent Document 2 discloses a DC brushless motor that generates a rotating magnetic field by sequentially switching a rotor having a plurality of permanent magnets and a stator winding that is energized based on a position detection signal obtained by the rotation. About. In Patent Document 2, it is possible to reduce the vibration and noise generated by the operation by the energization by controlling the energization at a frequency that avoids the resonance of the rotor.
  • Patent Document 1 Japanese Patent Laid-Open No. 2000-32706
  • Patent Document 2 Japanese Patent Laid-Open No. 11 113281
  • the number of magnetic poles does not match between the rotor side and the stator side.
  • the rotor side has eight magnetic poles and the stator side has nine current-carrying coils ( In the rotor 8 pole stator 9 pole), the magnetic force generated when the energizing coil is energized generates uneven force to attract the rotor in the radial direction. For this reason, the rotor swings in the radial direction.
  • a motor with a rotor 8-pole stator 9-pole structure can achieve high output, is easy to manufacture and is relatively easy to use.
  • an object of the present invention is to obtain a motor that can absorb the collision with the bearing due to the radial deflection of the rotor, reduce the generation of abnormal noise, and reduce the impact on the bearing.
  • the present invention drives a motor whose rotor swings in the radial direction when driven.
  • a drive control device that can reduce the contact with the bearing and suppress the generation of noise by controlling the drive at a drive frequency high enough to mitigate the collision of the rotor drawn in the radial direction with the bearing. The purpose is to obtain.
  • a motor according to the present invention includes a rotor having a magnet whose outer periphery is magnetized in plural, and a stator having a plurality of energizing coils arranged along the outer periphery of the rotor.
  • a load-side bearing that fixes one end of the rotor in the axial direction
  • an anti-load-side bearing that fixes the other end of the rotor in the radial direction
  • a damping member provided in the radial direction of the anti-load-side bearing
  • FIG. 1 is a cross-sectional view showing the structure of a motor according to Embodiment 1 of the present invention.
  • FIG. 2 is a cross-sectional view showing the eccentricity of the rotor during driving.
  • FIG. 3 is an enlarged view of a portion indicated by symbol B in FIG.
  • FIG. 4 is an enlarged view of a portion indicated by symbol C in FIG.
  • FIG. 5 is a view showing an example of a buffer member.
  • FIG. 6 is a view showing another example of the buffer member.
  • FIG. 7 is a block diagram showing a configuration of a motor drive system according to a second embodiment of the present invention.
  • FIG. 8 is a diagram for explaining the movement of the rotor during driving.
  • FIG. 1 is a cross-sectional view showing the structure of a motor according to Embodiment 1 of the present invention, showing a cross section in the axial direction, and showing a rotor 8-pole-stator 9-pole motor.
  • the motor 1 is roughly configured to include a rotor 3 and a stator 7.
  • the rotor 3 is provided with a permanent magnet 2 magnetized in a plurality of poles along the outer periphery, and a screw hole is provided in the central shaft portion thereof.
  • the permanent magnet 2 is NS magnetized to 8 poles.
  • the screw hole provided in the rotor 3 described above is arranged on the opposite side of the output end of the output shaft 11.
  • the installed screw 10 is inserted and inserted.
  • a stator 7 is a stator (iron core) 7a disposed so as to surround the rotor 3 in a motor cover (motor housing) 9a, and an energization coil is wound around the stator 7.
  • nine stators 7a are disposed so as to surround the rotor 3, and energizing coils are wound around these stators 7a, and NS magnetized to 9 poles by energization.
  • FIG. 2 is a view for explaining the eccentricity of the rotor 3 at the time of driving, and shows a cross section taken along the line AA in FIG.
  • Figures 2 (a) and 2 (c) differ from the motor 1 according to the first embodiment in that the rotor 3 has 12 poles and the stator 7 has 9 current coils.
  • Fig. 2 (b) and Fig. 2 (d) show the motor 1 according to the first embodiment, which shows a rotor 8 pole stator 9 pole motor. .
  • Fig. 2 (a) and Fig. 2 (b) show the situation when the U phase is energized from the V phase.
  • Fig. 2 (c) and Fig. 2 (d) show the situation from the U phase to the W phase. The situation when the phase is energized is shown.
  • Fig. 2 when the energizing coil of the stator is energized, the stator (iron core) is magnetized, and a force that attracts the permanent magnet pole of the rotor is generated.
  • the magnetic field is uniformly generated by energizing the energizing coil.
  • the attracting force acts equally in each direction (indicated by the arrows in Fig. 2 (a) and Fig. 2 (c)), and the rotor is not eccentric.
  • the buffer member 12 is provided in the gap between the bearing holding portion 3a of the rotor 3 and the inner ring 4a of the upper bearing 4 to generate noise. Suppress.
  • the buffer member 12 will be described later.
  • a boss (motor casing) 9b is assembled to the motor cover 9a, and the boss 9b holds a preload member 8 such as a washer. Further, an upper bearing 4 and a lower bearing 5 are attached to both ends of the rotor 3 to hold the rotating shaft.
  • FIG. 3 is an enlarged view of a portion indicated by a symbol B in FIG.
  • the inner ring 5a of the lower bearing 5 is fixed up and down in the axial direction by the step 3b of the rotor 3 and the holding mechanism 6 (fixed in the axial direction).
  • the outer ring 5b of the lower bearing 5 is fixed up and down in the axial direction by the step 9c of the motor cover 9a and the preload member 8 held by the boss 9b (fixed in the axial direction).
  • the outer ring 5b of the lower bearing 5 is fixed to the motor casing that is also configured with the motor cover 9a and the boss 9b.
  • the ball 5c is held between the inner ring 5a and the outer ring 5b of the lower bearing 5.
  • the upper bearing 4 is not fixed up and down in the axial direction, and is held by the rotor 3 and the stator 7 only in the radial direction (radial direction) perpendicular to the axial direction.
  • FIG. 4 is an enlarged view of a portion indicated by a symbol C in FIG. As shown in FIG. 4, the upper bearing 4 is held so as to be sandwiched between the bearing holding portion 3a of the rotor 3 and the bearing holding portion 9d of the motor cover 9a.
  • the upper bearing 4 is shown in the same dimensions as the lower bearing 5 shown in FIG. 3, but the actual size of the lower bearing 5 is larger than that of the upper bearing 4 as shown in FIG.
  • the lower bearing 5 provided on the load shaft (load side) on the output shaft 11 side of the motor 1 is larger than the upper bearing 4 provided on the opposite load side where the output shaft 11 side force is also separated. Is used. By doing so, the durability of the lower bearing 5 to which a higher load than the upper bearing 4 is applied when a load is applied to the motor can be improved.
  • the diameter for absorbing the dimensional variation of parts between the inner ring 4a of the upper bearing 4 and the bearing holding portion 3a of the rotor 3 is absorbed.
  • a directional gap D is provided.
  • the buffer member 12 is provided in the gap D. Even if this cushioning member 1 2 becomes a cushion and the rotor 3 is eccentric during driving and the bearing holding part 3a swings toward the inner ring 4a side of the upper bearing 4, the bearing holding part 3a and the inner ring 4a of the upper bearing 4 It is possible to suppress the generation of abnormal noise that does not collide directly.
  • FIG. 4 shows an example in which the buffer member 12 is formed by providing a gap D between the bearing holding portion 3a (rotor 3 side) of the rotor 3 and the inner ring 4a of the upper bearing 4.
  • the buffer member 12 may be formed by providing a gap D between the bearing holding portion 9d (stator 7 side) of the motor cover 9a and the outer ring 4b of the upper bearing 4.
  • FIG. 5 is a view showing an example of the buffer member 12 shown in FIG. 4, and shows an enlarged view of a portion indicated by reference symbol C in FIG. 1, as in FIG.
  • a groove 3c is formed on the outer periphery of the bearing holding portion 3a of the rotor 3, and an O-ring 12a, which is an elastic member, is fitted into the groove 3c to serve as a buffer member.
  • the O-ring 12a has a cross-sectional diameter that maintains the gap D as shown in FIG.
  • FIG. 6 is a view showing another example of the buffer member 12 shown in FIG. 4, and shows an enlarged view of a portion indicated by reference symbol C in FIG. 1, as in FIG.
  • the panel member has a V-shaped cross section. 12b is disposed along the outer periphery of the bearing holding portion 3a to serve as a buffer member.
  • the panel member 12b is an elastic member having elasticity in the radial direction while maintaining the gap D as shown in FIG.
  • the buffer member 12 in the present invention is an elastic member that can alleviate the impact when the bearing holding portion 3a swings toward the inner ring 4a side of the upper bearing 4 due to the eccentricity of the rotor 3.
  • the configuration is not limited to those shown in FIG. 5 and FIG.
  • the buffer member 12 is installed in the gap D formed between the bearing holding portion 3a of the rotor 3 and the inner ring 4a of the upper bearing 4.
  • the rotor rotates with a magnetic field that is not uniform in the radial direction, and a motor having a gap D between the rotor and the bearing is connected to the rotor.
  • Drive control is performed at a drive frequency high enough to mitigate collisions with bearings.
  • FIG. 7 is a block diagram showing the configuration of the motor drive system according to the second embodiment of the present invention.
  • motor 1 is the motor shown in the first embodiment.
  • the drive device 13 is driven by supplying current to the motor 1 in accordance with a command from the drive control device 14.
  • the drive control device 14 provides the drive device 13 with a drive frequency that is high enough to mitigate the collision between the bearing holding portion 3a of the rotor 3 and the inner ring 4a of the upper bearing 4, that is, in a frequency range that can reduce the number of collisions.
  • Set to control motor 1 drive In the example of FIG. 7, the drive device 13, the drive control device 14, and the motor 1 are shown as separate devices, but the drive device 13 and the drive control device 14 are used as drive circuits. It can be built into the motor 1 or can be built into the external control device (not shown) that controls the drive control device 14.
  • FIG. 8 is a view for explaining the movement of the rotor when the motor of the first embodiment is driven, and rotates the bearing holding portion 3 a of the rotor 3 and the inner ring 4 a of the upper bearing 4.
  • a cross section cut by a plane perpendicular to the axis is shown.
  • a low driving frequency is set so that the rotation of the rotor does not deteriorate (for example, around 200 Hz).
  • the motor 1 of the combination of the rotor 8 pole stator 9 pole shown in the first embodiment is rotated at this drive frequency, the rotor is rotated in 6 directions of 1 rotation as shown in FIG. 3 is attracted and rotated to a hexagonal shape, and at each apex, the inner ring 4a of the upper bearing 4 is contacted to generate an abnormal noise.
  • the rotor 3 When the drive frequency is made higher than the normal drive frequency, the rotor 3 tries to rotate to the next apex by energizing the next energizing coil before reaching each apex. In other words, as the drive frequency is increased, the number of collisions per rotation gradually decreases by 6 times.
  • the drive device 13 has a drive frequency high enough to alleviate the collision between the bearing holding portion 3a of the rotor 3 and the inner ring 4a of the upper bearing 4.
  • Set and rotate motor 1. For example, if the normal driving frequency is about 200 Hz, in the second embodiment, the motor 1 is driven at a driving frequency of about 500 Hz. As a result, the degree of contact with the bearing at each apex is reduced, and the occurrence of abnormal noise can be reduced.
  • the case where the driving frequency is increased until the number of times of collision in one rotation of the rotor 3 reaches SO times as indicated by a dashed line.
  • the drive frequency set by the drive control device 14 is, for example, as shown in FIG. 8, when the rotor 3 collided with Z rotation 6 times due to radial deflection, 5 times Z rotation, 4 times Z rotation, 3 times
  • the motor 1 shown in the first embodiment is driven.
  • the bearing 3 of the rotor 3 and the inner ring 4a of the bearing 4 are controlled by controlling the drive at a driving frequency high enough to mitigate the collision of the rotor 3 attracted in the radial direction with the bearing 4.
  • the number of times of contact is reduced and the generation of abnormal noise can be suppressed.
  • the drive control of the motor 1 according to the first embodiment has been described as an example.
  • the rotor is generated with a nonuniform magnetic field in the radial direction. It is also possible to control the driving of the motor that rotates the motor and does not include the buffer member 12 in the gap D. That is, by controlling the rotation at the drive frequency, the number of contact between the bearing holding portion of the rotor and the bearing can be reduced even in the motor.
  • the motor and the drive control apparatus absorbs the impact of the collision due to the radial deflection of the rotor by the buffer member provided on the side of the bearing, thereby providing wear resistance. It is suitable for use in high-power DC motors such as motors for vehicles that are under load.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Support Of The Bearing (AREA)
  • Control Of Electric Motors In General (AREA)

Abstract

La présente invention concerne un moteur comprenant un rotor (3) dont la périphérie extérieure de l'aimant permanent (2) est aimantée en plusieurs pôles, et un stator (7) comprenant une pluralité de bobines d'induction (7a) disposées sur la périphérie extérieure du rotor (3). La rotation du rotor (3) est provoquée par un champ magnétique radialement non homogène produit par le passage d'un courant dans les bobines d'induction (7a). Le moteur comprend en outre, du côté de la charge, un palier (5) auquel est fixée axialement une extrémité du rotor (3), du côté opposé à la charge, un palier (4) auquel est fixée axialement l'autre extrémité du rotor (3), et un élément amortisseur (12) monté radialement sur le palier (4) du côté opposé à la charge.
PCT/JP2007/050707 2006-03-24 2007-01-18 Dispositif de commande de moteur et d'entraînement WO2007111031A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2008507380A JP5306808B2 (ja) 2006-03-24 2007-01-18 車載機器用モータ駆動制御装置
CN2007800101693A CN101405929B (zh) 2006-03-24 2007-01-18 电动机及驱动控制装置
DE112007000576T DE112007000576T5 (de) 2006-03-24 2007-01-18 Motor und Antriebssteuerungsvorrichtung dafür

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-083691 2006-03-24
JP2006083691 2006-03-24

Publications (1)

Publication Number Publication Date
WO2007111031A1 true WO2007111031A1 (fr) 2007-10-04

Family

ID=38540966

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/050707 WO2007111031A1 (fr) 2006-03-24 2007-01-18 Dispositif de commande de moteur et d'entraînement

Country Status (4)

Country Link
JP (1) JP5306808B2 (fr)
CN (1) CN101405929B (fr)
DE (1) DE112007000576T5 (fr)
WO (1) WO2007111031A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009201255A (ja) * 2008-02-21 2009-09-03 Nsk Ltd 電動機及び電動パワーステアリング装置
JP2020085832A (ja) * 2018-11-30 2020-06-04 株式会社ジェイテクト 回転装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2482704B (en) * 2010-08-11 2014-01-15 Protean Electric Ltd Sealing arrangement for an electric motor or generator
DE102010064049A1 (de) * 2010-12-23 2012-06-28 Hamilton Bonaduz Ag Pipettiervorrichtung mit Linearmotor
JP5727973B2 (ja) * 2012-07-09 2015-06-03 日立オートモティブシステムズ株式会社 回転電機
JP5862831B2 (ja) * 2013-02-12 2016-02-16 日産自動車株式会社 回転電機

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07288998A (ja) * 1994-04-12 1995-10-31 Matsushita Electric Ind Co Ltd ステッピングモータの駆動方法
JPH102329A (ja) * 1996-06-18 1998-01-06 Nippon Seiko Kk 軸受装置
JP2004210017A (ja) * 2002-12-27 2004-07-29 Mitsubishi Electric Corp 電動油圧式パワーステアリング装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000032706A (ja) 1998-07-08 2000-01-28 Mitsumi Electric Co Ltd モータ

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07288998A (ja) * 1994-04-12 1995-10-31 Matsushita Electric Ind Co Ltd ステッピングモータの駆動方法
JPH102329A (ja) * 1996-06-18 1998-01-06 Nippon Seiko Kk 軸受装置
JP2004210017A (ja) * 2002-12-27 2004-07-29 Mitsubishi Electric Corp 電動油圧式パワーステアリング装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009201255A (ja) * 2008-02-21 2009-09-03 Nsk Ltd 電動機及び電動パワーステアリング装置
JP2020085832A (ja) * 2018-11-30 2020-06-04 株式会社ジェイテクト 回転装置
JP7200633B2 (ja) 2018-11-30 2023-01-10 株式会社ジェイテクト 回転装置

Also Published As

Publication number Publication date
CN101405929B (zh) 2011-12-28
JPWO2007111031A1 (ja) 2009-08-06
JP5306808B2 (ja) 2013-10-02
DE112007000576T5 (de) 2009-04-02
CN101405929A (zh) 2009-04-08

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