WO2012119302A1 - Moteur à aimants permanents triphasé en ferrite - Google Patents

Moteur à aimants permanents triphasé en ferrite Download PDF

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Publication number
WO2012119302A1
WO2012119302A1 PCT/CN2011/071573 CN2011071573W WO2012119302A1 WO 2012119302 A1 WO2012119302 A1 WO 2012119302A1 CN 2011071573 W CN2011071573 W CN 2011071573W WO 2012119302 A1 WO2012119302 A1 WO 2012119302A1
Authority
WO
WIPO (PCT)
Prior art keywords
ferrite
permanent magnet
phase
core
magnet motor
Prior art date
Application number
PCT/CN2011/071573
Other languages
English (en)
Chinese (zh)
Inventor
杜坤梅
曹立明
Original Assignee
浙江博望科技发展有限公司
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 浙江博望科技发展有限公司 filed Critical 浙江博望科技发展有限公司
Priority to PCT/CN2011/071573 priority Critical patent/WO2012119302A1/fr
Publication of WO2012119302A1 publication Critical patent/WO2012119302A1/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
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • 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
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • This invention relates to permanent magnet machines and, more particularly, to a ferrite three-phase permanent magnet machine suitable for use in refrigerators, air conditioners, and high speed drive applications.
  • the stator core of a permanent magnet motor generally uses a silicon steel sheet
  • the rotor generally uses a rare earth permanent magnet, such as a neodymium iron boron permanent magnet.
  • Silicon steel sheets and rare earth permanent magnet materials are becoming scarcer and increasingly expensive. In order to change this situation, people have made a lot of efforts.
  • One of the improvements is to use a motor without a stator core, which will inevitably increase the amount of permanent magnets.
  • Another improvement is to use hard ferrite magnet steel, which can avoid the use of rare earth permanent magnet materials, but it will inevitably lead to the magnetic load of the motor becoming lower, and can only be remedied by correspondingly increasing the electric load. Therefore, it is necessary to increase the amount of copper used. The loss of copper is increased, and more importantly, the force index of the motor will be greatly reduced.
  • the invention solves the problems existing in the existing sine wave permanent magnet servo motor and square wave permanent magnet servo motor, and proposes a new principle, new structure, high performance and high cost performance three-phase permanent magnet servo motor.
  • the present invention solves the problems of large copper consumption and high cost of the conventional permanent magnet motor.
  • the physical air gap between the stator core and the rotor core may be 0.2 to 3.0 mm; the width of the notch between the adjacent two teeth is 0.1 to 3.0 mm.
  • the volume resistivity of the soft ferrite is 100 ⁇ to 50 K ⁇ , and is selected from a manganese core soft ferrite, a nickel core soft ferrite, a microcrystalline silicon soft ferrite, or an SMC soft magnetic composite.
  • a manganese core soft ferrite a nickel core soft ferrite, a microcrystalline silicon soft ferrite, or an SMC soft magnetic composite.
  • One of the materials is selected from a manganese core soft ferrite, a nickel core soft ferrite, a microcrystalline silicon soft ferrite, or an SMC soft magnetic composite.
  • the stator core is formed by splicing nine independent teeth, wherein the remaining surfaces except the splicing surface are covered by an insulating layer having a thickness of 0.02 to 0.5 mm. .
  • the stator core is a unitary structure that is prefabricated. Wherein the stator core may be divided into a plurality of sections in the axial direction, including a front section forming a front groove at a front portion of the tooth, a rear section forming a rear groove at a rear portion of the tooth, and being located at the front section At least one intermediate segment between the rear segments.
  • each permanent magnet on the rotor core is arranged in phase; each of the permanent magnets is a radially magnetized tile-shaped hard ferrite magnet, or a parallel charge.
  • Magnetic tile-shaped hard ferrite magnet steel is
  • the outer circumference of the rotor core may be covered with a carbon fiber, glass fiber or aluminum protective cover having a thickness of 0.15 to 2 mm.
  • the three-phase permanent magnet motor of the present invention has a series of advantages such as minimizing winding end, minimizing air gap, minimizing material, minimizing positioning torque, and minimizing iron loss and copper loss, etc. High operating speeds, higher power/volume ratios and torque/volume ratios minimize costs.
  • This three-phase permanent magnet motor can replace the existing induction motor, permanent magnet motor, or replace the air conditioner and refrigerator compressor drive motor, becoming the mainstream drive motor for high performance, energy saving air conditioner and refrigerator compressor in the future.
  • FIG. 1 is a schematic view showing the structure of a motor assembly in a preferred embodiment of the present invention
  • FIG. 2 is a schematic view showing the structure of a stator and a rotor of a motor in a preferred embodiment of the present invention
  • Figure 3 is a front elevational view of the single tooth shown in Figure 2;
  • Figure 4 is a left side view of the single tooth shown in Figure 3;
  • Figure 5 is a schematic view showing the structure of a tile-shaped hard ferrite magnetron rotor in a preferred embodiment of the present invention
  • Figure 6 is a schematic view showing the structure of a rotor composed of a radially magnetized hard ferrite magnet block in a preferred embodiment of the present invention
  • Fig. 7 is a schematic view showing the stator core divided into three sections in the axial direction in a preferred embodiment of the present invention.
  • the main components of the ferrite three-phase permanent magnet motor include a rotor 1, a stator 2, a rotating shaft 30, etc., and a physical air gap 5 between the rotor 1 and the stator 2 is 0.1 to 2 mm.
  • the relationship between the width M11 of the outer circular end 50 of each of the teeth 40, the width M21 of the inner circular end 60, and the width M31 of the tooth core 70 is M11>M21>M31; and each tooth
  • the axial length M12 of the outer end 50, the axial length M22 of the inner circular end 60, and the axial length M32 of the tooth center 70 are M12>M32, M22>M32; thus, both in the axial direction and the radial direction of the tooth.
  • each phase of the motor has three concentrated windings connected in series, which are respectively wound on three teeth; as shown in Fig. 2, the arrangement of nine teeth around the three-phase winding of A, B and C is: A ⁇ B ⁇ C ⁇ A ⁇ B ⁇ C ⁇ A ⁇ B ⁇ C. Due to the front and rear grooves and the left and right groove structures on each tooth, the outer edge of the concentrated winding is limited to the inside of the stator core. Compared with the conventional motor, this motor saves a large number of winding wires, using copper and iron. Significantly reduced, resulting in a higher power/volume ratio, higher torque/volume ratio, and the cost is minimized.
  • the winding wire in this embodiment is shortened by 1.207 times.
  • the rotor uses hard ferrite, avoiding the use of rare earth permanent magnet materials, although the magnetic load of the motor is reduced by 2 times, it is necessary to increase the electric load by 2 times to remedy the motor performance, but the total length of the winding is shortened by 1.207 times, the motor The copper loss will be reduced by 1.458 times; and because the stator of the motor uses soft ferrite, the iron loss of the motor will be reduced by 3 to 10 times.
  • the integrated loss of this motor and the traditional concentrated winding three-phase permanent magnet motor Quite, even smaller; and because the magnetic load of the motor is reduced by 2 times, the positioning torque and torque fluctuation of the motor is 20 ⁇ 30% smaller than that of the traditional concentrated winding motor, and the noise is smaller than that of the traditional concentrated winding motor; Small, it is more advantageous to reduce the internal resistance of the motor.
  • stator core is made of soft ferrite and operates at frequencies up to 10 kHz, it allows the motor to rotate at tens of thousands of revolutions per minute, which makes sense for high speed applications.
  • the motor can be driven with a three-phase square wave or sinusoidal current.
  • the remaining surfaces except the splicing surface are covered by the insulating layer, and the thickness of the insulating layer may be 0.02-0.5 mm.
  • the width of the notch 3 is 0.1 to 3.0 mm.
  • the volume resistance of the soft ferrite can be 100 ⁇ to 50 K ⁇ , so the core loss of the soft ferrite stator is 3 to 10 times or more smaller than that of the silicon steel sheet stator core.
  • the soft ferrite here may be made of one of a manganese core soft ferrite, a nickel core soft ferrite, a microcrystalline silicon soft ferrite, or an SMC soft magnetic composite material, and the saturation magnetic density thereof is inevitably not Will be lower than the residual magnetic flux of the permanent ferrite, they are naturally matched.
  • a single independent tooth can be formed by a certain process in a sintering process, a bonding process, an injection process, or a mixing process, and the windings in series can be wound for every three teeth. And then spliced into a unitary stator core assembly.
  • the stator core can also be fabricated in a prefabricated manner (in this case, there are no separate teeth), and then the three-phase windings are directly wound on the integral stator core by a shuttle or by hand.
  • the N and S magnetic poles of the respective permanent magnets on the rotor core are arranged, and the permanent magnets here are radially magnetized tile-shaped hard ferrite magnets or parallel magnetized.
  • the tile-shaped hard ferrite magnet steel has the same direct-axis reluctance and the reciprocal reluctance of the rotor of the motor, and belongs to a hidden pole motor, and the running noise of the motor is smaller than that of the salient pole motor.
  • the permanent magnet is a radially magnetized hard ferrite magnet block having a pole pitch of ⁇ D/6 and an axial physical dimension L of 30 to 200 mm, wherein D is outside the rotor.
  • the diameter of the outer chord is ⁇ D/6
  • the inner diameter of the magnetic block is -D/n
  • n 1.5 ⁇ 3
  • the inner diameter is ⁇ D/6.
  • the in-line permanent magnet is used, the direct magnetoresistance of the rotor is larger than the cross-axis reluctance, and the salient pole effect is obtained. When the motor is running, the salient pole moment can be obtained, and the output is larger than that of the hidden pole motor.
  • a protective sleeve having a thickness of 0.15-2 mm is sleeved on the outer circumference of the rotor, and the protective sleeve can be made of carbon fiber, glass filament or aluminum, and can be prevented from rotating on the rotor when the motor rotates at a high speed.
  • the permanent magnet centrifugal force is too large to fall off.
  • the stator core is divided into three sections in the axial direction, including a front section (left side section in FIG. 7) forming a front groove at a front portion of the tooth, behind the teeth.
  • the rear portion of the rear groove (the right side segment in Fig. 7) and the intermediate portion between the front and rear portions (the middle portion in Fig. 7).
  • the number of intermediate segments may be one or more; when the lengths of the current segment and the rear segment are fixed, the axis of the entire stator core can be adjusted by increasing the number of intermediate segments or adjusting the length of the intermediate segment. To the length.
  • This axially segmented structure can be applied to the case where a plurality of teeth shown in FIG.
  • FIG. 2 are spliced into a stator core, that is, each tooth is divided into a plurality of segments, and FIG. 7 shows the left of a single tooth corresponding to FIG.
  • the view structure, the main view structure is shown in Figure 3; of course, this axial segmented structure can also be applied to the overall prefabricated stator core, in this case, the overall prefabrication of multiple segments.
  • the ferrite three-phase permanent magnet motor in the above embodiment is usually used as an electric motor and is driven by a three-phase square wave or sine wave current; it is suitable for refrigerators, air conditioners, and high-speed driving applications; when it is driven by a rotating machine, it can also become Three-phase permanent magnet generator.

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

Abstract

L'invention concerne un moteur à aimants permanents triphasé en ferrite dans lequel le nombre de fentes Z du stator est de 9. Les fentes utilisées pour recevoir les enroulements sont formées à l'avant, à l'arrière, à gauche et à droite de chaque dent. Chaque phase comprend trois enroulements concentrés en série qui entourent trois dents séparément. La disposition des 9 dents enroulant les enroulements triphasés A, B, C est A-B-C-A-B-C-A-B-C. L'aimant permanent du noyau en fer du rotor est fait de ferrite magnétique dure, et le nombre de pôles magnétiques 2P est de 6. Le moteur a pour avantages une extrémité d'enroulement réduite, un faible couple de positionnement, une moindre concentration en cuivre et en fer, etc.
PCT/CN2011/071573 2011-03-07 2011-03-07 Moteur à aimants permanents triphasé en ferrite WO2012119302A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/071573 WO2012119302A1 (fr) 2011-03-07 2011-03-07 Moteur à aimants permanents triphasé en ferrite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2011/071573 WO2012119302A1 (fr) 2011-03-07 2011-03-07 Moteur à aimants permanents triphasé en ferrite

Publications (1)

Publication Number Publication Date
WO2012119302A1 true WO2012119302A1 (fr) 2012-09-13

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9051376B2 (en) 2011-02-23 2015-06-09 Novozymes, Inc. Polypeptides having cellulolytic enhancing activity and polynucleotides encoding same
CN107154692A (zh) * 2017-06-16 2017-09-12 浙江迪贝电气股份有限公司 一种永磁铁氧体转子
EP3346584A1 (fr) * 2017-01-10 2018-07-11 LG Electronics Inc. Moteur alternatif de type à noyau amovible et compresseur alternatif le comprenant
CN112953156A (zh) * 2021-04-16 2021-06-11 河北工业大学 一种采用混合材料定子磁芯的圆筒形永磁直线电机
CN112564330B (zh) * 2020-12-24 2024-04-02 沈阳裕衡驱动科技有限公司 一种多转子电机定子铁芯结构

Citations (5)

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Publication number Priority date Publication date Assignee Title
EP0266862A1 (fr) * 1986-08-11 1988-05-11 Maghemite Inc. Machine dynamo-électrique à courant continu sans balais
CN2560153Y (zh) * 2002-08-09 2003-07-09 张金铎 永磁同步高速电机
CN1297055C (zh) * 2001-01-04 2007-01-24 美国艾默生电气公司 用于分段式定子电机的端帽组件
CN101345439A (zh) * 2007-07-11 2009-01-14 A.O.史密斯公司 具有定子的电机
CN201699563U (zh) * 2010-06-06 2011-01-05 浙江三力机电制造有限公司 一种三相六极直流无刷电机

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0266862A1 (fr) * 1986-08-11 1988-05-11 Maghemite Inc. Machine dynamo-électrique à courant continu sans balais
CN1297055C (zh) * 2001-01-04 2007-01-24 美国艾默生电气公司 用于分段式定子电机的端帽组件
CN2560153Y (zh) * 2002-08-09 2003-07-09 张金铎 永磁同步高速电机
CN101345439A (zh) * 2007-07-11 2009-01-14 A.O.史密斯公司 具有定子的电机
CN201699563U (zh) * 2010-06-06 2011-01-05 浙江三力机电制造有限公司 一种三相六极直流无刷电机

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9051376B2 (en) 2011-02-23 2015-06-09 Novozymes, Inc. Polypeptides having cellulolytic enhancing activity and polynucleotides encoding same
US9365843B2 (en) 2011-02-23 2016-06-14 Novozymes, Inc. Polypeptides having cellulolytic enhancing activity and polynucleotides encoding same
EP3346584A1 (fr) * 2017-01-10 2018-07-11 LG Electronics Inc. Moteur alternatif de type à noyau amovible et compresseur alternatif le comprenant
EP3346585A3 (fr) * 2017-01-10 2018-10-10 LG Electronics Inc. Moteur alternatif de type à noyau mobile et compresseur alternatif le comprenant
US10811920B2 (en) 2017-01-10 2020-10-20 Lg Electronics Inc. Moving core-type reciprocating motor and reciprocating compressor having the same
US10819173B2 (en) 2017-01-10 2020-10-27 Lg Electronics Inc. Moveable core-type reciprocating motor and reciprocating compressor having a moveable core-type reciprocating motor
CN107154692A (zh) * 2017-06-16 2017-09-12 浙江迪贝电气股份有限公司 一种永磁铁氧体转子
CN112564330B (zh) * 2020-12-24 2024-04-02 沈阳裕衡驱动科技有限公司 一种多转子电机定子铁芯结构
CN112953156A (zh) * 2021-04-16 2021-06-11 河北工业大学 一种采用混合材料定子磁芯的圆筒形永磁直线电机
CN112953156B (zh) * 2021-04-16 2024-05-07 河北工业大学 一种采用混合材料定子磁芯的圆筒形永磁直线电机

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