WO2011062064A1 - Moteur synchrone à aimants permanents - Google Patents

Moteur synchrone à aimants permanents Download PDF

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Publication number
WO2011062064A1
WO2011062064A1 PCT/JP2010/069594 JP2010069594W WO2011062064A1 WO 2011062064 A1 WO2011062064 A1 WO 2011062064A1 JP 2010069594 W JP2010069594 W JP 2010069594W WO 2011062064 A1 WO2011062064 A1 WO 2011062064A1
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WO
WIPO (PCT)
Prior art keywords
ratio
stator
shape
width
magnetic pole
Prior art date
Application number
PCT/JP2010/069594
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English (en)
Japanese (ja)
Inventor
敏則 田中
信一 山口
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2011541877A priority Critical patent/JP5419991B2/ja
Priority to CN201080051947.5A priority patent/CN102668329B/zh
Publication of WO2011062064A1 publication Critical patent/WO2011062064A1/fr

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    • 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
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2726—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of a single magnet or two or more axially juxtaposed single magnets
    • H02K1/2733—Annular magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Definitions

  • the present invention relates to a permanent magnet type synchronous motor that suppresses torque ripple.
  • the gap magnetic flux density distribution is designed to be more sinusoidal by devising the magnet shape and the like.
  • a technique has been proposed in which a magnet is divided to change the magnetic flux density of the magnet so that the gap magnetic flux density distribution approaches a sine wave shape (see, for example, Patent Document 1).
  • the prior art has the following problems.
  • the diameter of the rotor is also small.
  • a polar anisotropic ring magnet is expensive compared with a radial anisotropic ring magnet, a radial anisotropic ring magnet or a segment magnet is often used in a motor having a small diameter.
  • the gap magnetic flux density distribution can be made closer to a sine wave by devising its shape.
  • the gap magnetic flux density distribution is distributed in a sine wave shape because it has a specific orientation.
  • the gap magnetic flux density distribution is generally trapezoidal. For this reason, the distortion of the induced voltage is larger than that of a segment magnet or a polar anisotropic ring magnet, and torque ripple is also increased.
  • this cogging torque generates a pulsation number that is the least common multiple of the number of slots in the stator and the number of magnetic poles of the permanent magnet per mechanical rotation of the rotor.
  • the magnitude of this cogging torque is inversely proportional to the pulsation number. To do. For this reason, in order to reduce the cogging torque of the motor, a combination that increases the least common multiple of the number of slots of the stator and the number of magnetic poles of the permanent magnet is selected.
  • a motor of this combination with a large least common multiple it is a motor driven by a so-called three-phase power supply, and has Z (Z is a natural number) stators formed in an annular shape and provided with windings (coils).
  • Z is a natural number
  • the present invention has been made in order to solve the above-described problems.
  • a radial anisotropic ring magnet is used for a motor having a small diameter
  • the permanent magnet capable of suppressing the 12f component of torque ripple to a low level.
  • An object is to obtain a synchronous motor.
  • the permanent magnet type synchronous motor according to the present invention has a Z-shaped (Z is a natural number) stator formed in an annular shape and wound, and 2P pole (P is a natural number) permanent magnets, and Z / ( 3 (phase) ⁇ 2P) is a permanent magnet type synchronous motor having a value of 2/5 or 2/7, a radial anisotropic ring magnet is applied as a permanent magnet, and a slot opening between adjacent stator tip portions
  • the condition of tw / h ⁇ 3 When the transition region is provided and magnetized so that the ratio of the ratio of the transition region is provided and magnetized so that the ratio of the
  • the permanent magnet type synchronous motor according to the present invention has a Z-shaped (Z is a natural number) stator and a 2P pole (P is a natural number) permanent magnet formed in an annular shape and wound.
  • / (3 (phase) ⁇ 2P) is a permanent magnet synchronous motor having a value of 2/5 or 2/7, a radial anisotropic ring magnet is applied as a permanent magnet, and a slot is formed between adjacent stator tip portions.
  • the radial anisotropic ring magnet has a magnetizing waveform when the width of the front end of the flange portion constituting the front end portion of the stator is h, the width of the root is tw, and the width of the slot opening is bg.
  • the ratio of the flat region is designed to an appropriate value according to the tooth shape.
  • FIG. 5 is a diagram showing a magnetic flux density waveform when a radial anisotropic ring magnet 30 is used in the permanent magnet type synchronous motor of Embodiment 1 of the present invention.
  • the ratio of the flat area of the magnetic flux density waveform in one magnetic pole and the magnitude of the torque ripple 12f component when the tooth tip shape of the permanent magnet type synchronous motor in Embodiment 2 of the present invention is Condition 3 (3 ⁇ h / bg) FIG.
  • the present invention is a motor driven by a so-called three-phase power source, and has Z-shaped (Z is a natural number) stators formed in an annular shape and provided with windings (coils), and has 2P poles (P is a natural number).
  • Z is a natural number
  • the magnetism of the ring magnet is changed to provide a transition region, and torque ripple It is possible to suppress the 12f component of.
  • the value of Z / (3 (phase) ⁇ 2P) is 2/5 will be described as an example. However, the same result and the case where this value is 2/7 are also described. It has been verified that the effect of can be obtained.
  • the permanent magnet type synchronous motor of FIG. 1 includes a stator core 10, a rotor core 20, and a radial anisotropic ring magnet 30, and the stator core 10 has a plurality of teeth portions 11.
  • FIG. 2 is an enlarged view of the stator core 10 of the permanent magnet type synchronous motor according to Embodiment 1 of the present invention, and corresponds to an enlarged view of the tooth portion 11 of FIG.
  • the 10-pole 12-slot motor shown in FIG. 1 there is no gap (so-called slot opening) between adjacent teeth 11 as shown in FIG.
  • Each tooth portion 11 has a flange portion 12 along the circumferential direction of the rotor core 20, and the symbol “h” in FIG. 2 indicates the width of the tip of the flange portion 12, and the symbol “tw” The width of the base of the flange portion 12 is shown.
  • FIG. 3 is an enlarged view of the rotor core 20 of the permanent magnet type synchronous motor according to the first embodiment of the present invention, and shows the magnet orientation of the rotor.
  • the radial anisotropic ring magnet 30 is a magnet having a plurality of poles in one magnet.
  • FIG. 3 illustrates the division between poles and poles. The pole-to-pole boundary as shown is not visible.
  • FIG. 4 is a diagram showing a magnetic flux density waveform when the radial anisotropic ring magnet 30 is used in the permanent magnet type synchronous motor according to the first embodiment of the present invention.
  • FIG. 5 is a diagram showing the relationship of the ratio of the no-load induced voltage to the ratio of the flat area of one magnetic pole in the first embodiment of the present invention.
  • the “ratio of the flat region” on the horizontal axis corresponds to the ratio of the flat region A1 to the region A3 of one magnetic pole.
  • the “ratio of no-load induced voltage” on the vertical axis represents each no-load induced voltage when the ratio of the flat region is changed as a ratio when the maximum value is 100%. .
  • the case where the ratio of the flat area is maximized corresponds to the case where the ratio of the flat area on the horizontal axis is about 97%.
  • the no-load induced voltage on the vertical axis is the maximum value. Of 100%.
  • the ratio of the flat area A1 of the magnetic flux density waveform shown in FIG. 4 is larger (that is, the ratio of the transition area A2 is smaller), the no-load induced voltage becomes larger as shown in FIG. In a motor of the same size, a higher output can be obtained as the no-load induced voltage is higher. For this reason, increasing the transition area A2 leads to a decrease in the output of the motor.
  • the ratio of the flat region A1 When the decrease in the no-load induced voltage is suppressed to 10% or less (that is, in FIG. 5, the ratio of the no-load induced voltage is 90% or more), the ratio of the flat region A1 must be 55% or more.
  • the relationship of the ratio of the no-load induced voltage to the ratio of the flat region A1 shown in FIG. 5 does not depend on the shape of the flange portion 12 of the tooth portion 11, and the relationship of the tooth portion 11 shown in FIG. Even if the ratio of the root width tw to the width h of the tip of the flange portion 12 is any value, the relationship is the same.
  • FIG. 6 is a diagram showing the relationship between the ratio of the flat area of the magnetic flux density waveform at one magnetic pole in Embodiment 1 of the present invention and the magnitude of the torque ripple 12f component.
  • FIG. 6 shows the ratio of the flat area and the torque ripple with respect to the three patterns in which the ratio of the root width tw to the tip width h of the flange portion 12 of the tooth portion 11 shown in FIG. 2 is changed. This shows the relationship with the size of the 12f component.
  • the three patterns in which the ratio of the root width tw to the width h of the tip of the flange portion 12 is changed are the following expressions (1) to (3).
  • [Pattern 1] tw / h 1 (1)
  • the “torque ripple 12 component size” when the “flat area ratio” range is 85% to 95% is the “torque ripple” when the “flat area ratio” is about 97%. It is larger than “the size of 12 components”. For this reason, the effect of reducing the value of the torque ripple 12 component cannot be obtained, and an appropriate “flat area ratio” range for reducing the value of the torque ripple 12 component is expressed by the above equation (4). As shown, it is 55% to 80%.
  • the “size of the torque ripple 12 component” when the “flat region ratio” is 95% or less is the “torque ripple 12 component size” when the “flat region ratio” is about 97%. It is smaller than “size”. For this reason, the appropriate range of the “flat area ratio” for reducing the value of the torque ripple 12 component is 55% to 95% as shown in the above equation (6).
  • the radial anisotropy is applied to a motor having a small diameter by setting the “ratio of the flat region” within an appropriate range in accordance with the shape of the flange portion of the tooth portion. Even when a ring magnet is used, the 12f component of the torque ripple can be reduced while suppressing the decrease in the no-load induced voltage to 10% or less.
  • Embodiment 2 the case where a radial anisotropic ring magnet is used for a motor having a small diameter and no gap (so-called slot opening) between adjacent teeth 11 has been described.
  • a radial anisotropic ring magnet is used for a motor having a small diameter and having a gap portion (so-called slot opening portion 13) between adjacent teeth portions 11 will be described. To do.
  • the permanent magnet type synchronous motor of FIG. 7 includes a stator core 10, a rotor core 20, and a radial anisotropic ring magnet 30, and the stator core 10 has a plurality of teeth portions 11.
  • FIG. 8 is an enlarged view of the stator core 20 of the permanent magnet type synchronous motor according to the second embodiment of the present invention, and corresponds to an enlarged view of the tooth portion of FIG.
  • the 10-pole 12-slot motor shown in FIG. 7, as shown in FIG. 8 there is a gap portion (so-called slot opening 13) between adjacent teeth portions 11.
  • Each tooth portion 11 has a flange portion 12 along the circumferential direction of the rotor core 20, and the symbol “h” in FIG. 8 indicates the width of the tip of the flange portion 12, and the symbol “tw” The width of the base of the flange portion 12 is shown. Further, the symbol “bg” in FIG. 8 indicates the width of the slot opening 13.
  • FIG. 9 is a diagram showing the relationship of the ratio of the no-load induced voltage to the ratio of the flat area of one magnetic pole in the second embodiment of the present invention.
  • the “ratio of the flat area” on the horizontal axis corresponds to the ratio of the flat area A1 to the area A3 of one magnetic pole.
  • the ratio of the flat area A1 of the magnetic flux density waveform is larger (that is, the ratio of the transition area A2 is smaller), as shown in FIG.
  • the no-load induced voltage increases.
  • the ratio of the flat region A1 must be 55% or more. I must.
  • the relationship of the ratio of the no-load induced voltage to the ratio of the flat region shown in FIG. 9 does not depend on the shape of the flange portion 12 of the tooth portion 11, and the flange of the tooth portion 11 shown in FIG.
  • the ratio of the root width tw to the width h of the tip of the portion 12 and the width bg of the slot opening have any similar relationship.
  • the “size of the torque ripple 12 component” in the range where the “flat area ratio” is 95% or less is the “torque ripple 12” when the “flat area ratio” is about 97%. It is smaller than the “component size”. For this reason, the appropriate range of the “flat area ratio” for reducing the value of the torque ripple 12 component is 55% to 95% as shown in the above equations (10) and (11).
  • the “torque ripple 12 component size” when the “flat area ratio” range is 85% to 95% is “torque ripple” when the “flat area ratio” is about 97%. It is larger than “the size of 12 components”. For this reason, the effect of reducing the value of the torque ripple 12 component cannot be obtained, and an appropriate range of the “flat area ratio” for reducing the value of the torque ripple 12 component is shown in the above equation (12). As shown, it is 55% to 80%.
  • FIG. 11 shows the ratio of the flat area of the magnetic flux density waveform in one magnetic pole when the tooth tip shape of the permanent magnet type synchronous motor in Embodiment 2 of the present invention is Condition 2 (1 ⁇ h / bg ⁇ 3), and the torque It is the figure which showed the relationship with the magnitude
  • FIG. 11 shows the ratio of the flat area and the torque ripple in each pattern of the formulas (1) to (3) as in FIG. 6 in the first embodiment under the condition of 1 ⁇ h / bg ⁇ 3. This shows the relationship with the size of the 12f component.
  • the “torque ripple 12 component size” when the “flat area ratio” range is 85% to 95% is the “torque ripple” when the “flat area ratio” is about 97%. It is larger than “the size of 12 components”. For this reason, the effect of reducing the value of the torque ripple 12 component cannot be obtained, and an appropriate “flat area ratio” range for reducing the value of the torque ripple 12 component is shown in the above equation (13). As shown, it is 55% to 80%.
  • the “size of the torque ripple 12 component” when the “flat region ratio” is 95% or less is “torque ripple 12” when the “flat region ratio” is about 97%. It is smaller than the “component size”. For this reason, the appropriate range of the “flat area ratio” for reducing the value of the torque ripple 12 component is 55% to 95% as shown in the above equations (14) and (15).
  • FIG. 12 shows the ratio of the flat area of the magnetic flux density waveform in one magnetic pole when the tooth tip shape of the permanent magnet type synchronous motor according to Embodiment 2 of the present invention is Condition 3 (3 ⁇ h / bg), and the torque ripple 12f. It is the figure which showed the relationship with the magnitude
  • This FIG. 12 shows the ratio of the flat area and the 12f component of the torque ripple in each pattern of the formulas (1) to (3) as in FIG. 6 in the first embodiment under the condition of 3 ⁇ h / bg. It shows the relationship with the size of.
  • the “size of the torque ripple 12 component” when the “ratio of the flat region” is 95% is the “size of the torque ripple 12 component” when the “ratio of the flat region” is about 97%. It ’s bigger than For this reason, the effect of reducing the value of the torque ripple 12 component cannot be obtained, and an appropriate range of the “flat area ratio” for reducing the value of the torque ripple 12 component is expressed by the above equation (16). As shown, it is 55% to 90%.
  • the “size of the torque ripple 12 component” when the “flat region ratio” is 95% or less is “torque ripple 12” when the “flat region ratio” is about 97%. It is smaller than the “component size”. For this reason, an appropriate range of the “flat area ratio” for reducing the value of the torque ripple 12 component is 55% to 95% as shown in the above equations (17) and (18).
  • the “flat area ratio” is within an appropriate range depending on the shape of the flange portion of the tooth and the shape of the slot opening.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un moteur synchrone à aimants permanents grâce auquel une composante d'ondulations du couple 12f peut être rendue minimale en utilisant un aimant annulaire anisotrope radialement dans un moteur de faible diamètre. Ce moteur synchrone a Z stators annulaires ayant des bobinages de fil et un aimant permanent avec 2P pôles, Z/(3∙2P) étant soit 2/5, soit 2/7 (3 étant le nombre de phases). Si un aimant annulaire anisotrope radialement est utilisé comme aimant permanent, une composante d'ondulations du couple 12f peut être réduite en aimantant l'aimant annulaire anisotrope radialement de telle sorte que le rapport d'une région plate à une région de transition, dans la forme d'onde d'aimantation d'un pôle magnétique, a une valeur adéquate donnée tw/h, où h est la largeur au sommet des brides constituant les sections de pointe des stators et tw est la largeur à la base de ces brides.
PCT/JP2010/069594 2009-11-17 2010-11-04 Moteur synchrone à aimants permanents WO2011062064A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2011541877A JP5419991B2 (ja) 2009-11-17 2010-11-04 永久磁石式同期モータ
CN201080051947.5A CN102668329B (zh) 2009-11-17 2010-11-04 永久磁铁式同步马达

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JP2009262334 2009-11-17
JP2009-262334 2009-11-17

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013054439A1 (fr) * 2011-10-14 2013-04-18 三菱電機株式会社 Moteur à aimants permanents
JPWO2013054439A1 (ja) * 2011-10-14 2015-03-30 三菱電機株式会社 永久磁石型モータ
JP2015130793A (ja) * 2015-02-04 2015-07-16 三菱電機株式会社 永久磁石型モータ
EP3457547A4 (fr) * 2016-05-10 2019-05-22 Mitsubishi Electric Corporation Moteur à aimants permanents
EP3457546A4 (fr) * 2016-05-10 2019-05-22 Mitsubishi Electric Corporation Moteur à aimants permanents

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013132164A (ja) * 2011-12-22 2013-07-04 Sharp Corp 永久磁石モータ

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Publication number Priority date Publication date Assignee Title
JPH1189197A (ja) * 1997-09-08 1999-03-30 Matsushita Electric Ind Co Ltd 永久磁石同期電動機
JP2003007534A (ja) * 2001-06-18 2003-01-10 Daido Steel Co Ltd 永久磁石着磁方法、永久磁石およびモータ
WO2005025037A1 (fr) * 2003-09-04 2005-03-17 Mitsubishi Denki Kabushiki Kaisha Moteur de synchronisation de type aimant permanent et son procede de fabrication
JP2006288042A (ja) * 2005-03-31 2006-10-19 Toshiba Corp 永久磁石形モータ

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
US6940205B1 (en) * 1997-09-08 2005-09-06 Matsushita Electric Industrial Co., Ltd. Permanent magnet synchronous motor
JP2008067561A (ja) * 2006-09-11 2008-03-21 Yaskawa Electric Corp 永久磁石形電動機

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1189197A (ja) * 1997-09-08 1999-03-30 Matsushita Electric Ind Co Ltd 永久磁石同期電動機
JP2003007534A (ja) * 2001-06-18 2003-01-10 Daido Steel Co Ltd 永久磁石着磁方法、永久磁石およびモータ
WO2005025037A1 (fr) * 2003-09-04 2005-03-17 Mitsubishi Denki Kabushiki Kaisha Moteur de synchronisation de type aimant permanent et son procede de fabrication
JP2006288042A (ja) * 2005-03-31 2006-10-19 Toshiba Corp 永久磁石形モータ

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013054439A1 (fr) * 2011-10-14 2013-04-18 三菱電機株式会社 Moteur à aimants permanents
JPWO2013054439A1 (ja) * 2011-10-14 2015-03-30 三菱電機株式会社 永久磁石型モータ
EP2768126A4 (fr) * 2011-10-14 2016-03-09 Mitsubishi Electric Corp Moteur à aimants permanents
US9564779B2 (en) 2011-10-14 2017-02-07 Mitsubishi Electric Corporation Permanent magnet motor
JP2015130793A (ja) * 2015-02-04 2015-07-16 三菱電機株式会社 永久磁石型モータ
EP3457547A4 (fr) * 2016-05-10 2019-05-22 Mitsubishi Electric Corporation Moteur à aimants permanents
EP3457546A4 (fr) * 2016-05-10 2019-05-22 Mitsubishi Electric Corporation Moteur à aimants permanents
US10916983B2 (en) 2016-05-10 2021-02-09 Mitsubishi Electric Corporation Permanent-magnet motor
US11108312B2 (en) 2016-05-10 2021-08-31 Mitsubishi Electric Corporation Permanent-magnet motor including v-shaped permanent-magnet pairs

Also Published As

Publication number Publication date
TWI454020B (zh) 2014-09-21
TW201131941A (en) 2011-09-16
CN102668329A (zh) 2012-09-12
CN102668329B (zh) 2014-09-17
JP5419991B2 (ja) 2014-02-19
JPWO2011062064A1 (ja) 2013-04-04

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