WO2014090050A1 - 电机转子 - Google Patents

电机转子 Download PDF

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Publication number
WO2014090050A1
WO2014090050A1 PCT/CN2013/086334 CN2013086334W WO2014090050A1 WO 2014090050 A1 WO2014090050 A1 WO 2014090050A1 CN 2013086334 W CN2013086334 W CN 2013086334W WO 2014090050 A1 WO2014090050 A1 WO 2014090050A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
motor
permanent magnet
inner bore
recess
Prior art date
Application number
PCT/CN2013/086334
Other languages
English (en)
French (fr)
Inventor
巫存
Original Assignee
艾默生环境优化技术(苏州)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 艾默生环境优化技术(苏州)有限公司 filed Critical 艾默生环境优化技术(苏州)有限公司
Publication of WO2014090050A1 publication Critical patent/WO2014090050A1/zh

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/28Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/27Rotor cores with permanent magnets
    • H02K1/2706Inner rotors
    • H02K1/272Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753Inner 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
    • H02K1/276Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]
    • H02K1/2766Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] having a flux concentration effect

Definitions

  • the present invention relates to an electric machine rotor, and more particularly to an electric machine rotor capable of improving the assembly between the inner bore of the rotor and the rotor shaft of the rotor. Background technique
  • brushless permanent magnet DC motors are widely used in new energy vehicles, inverter air conditioner compressors, etc. due to their high efficiency, high torque density and reliable performance.
  • the stator transmits the excitation magnetic field generated by the stator winding at different positions. The difference is large, which causes the output torque of the motor to pulsate.
  • the drive motor of the inverter compressor currently on the market usually adopts a 4-pole distributed coil or a 4-pole concentrated coil structure, that is, the rotor adopts 4 sets of bodies, that is, 4 poles, and the stator turns are uniformly distributed along the circumferential direction of the stator.
  • a number of (e.g., 40) small turns are or even a number (e.g., 6) of concentrated turns that are evenly distributed along the circumferential direction of the stator.
  • the disadvantages of the above two kinds of permanent magnet motors are that the output torque ripple is large, which results in a large noise of the motor during operation, and the efficiency is low, especially at low speed.
  • the permanent magnets located in different parts of the rotor core have different requirements for anti-demagnetization capability.
  • a higher-ranking permanent magnet is usually employed in order to satisfy the maximum anti-demagnetization capability required for the permanent magnet.
  • the disadvantage in this case is that high-grade permanent magnets are used in locations where greater resistance to demagnetization is not required, thereby increasing the material cost of the permanent magnet motor.
  • the drive shaft of the permanent magnet motor is generally assembled in the center hole of the rotor of the permanent magnet motor by an interference fit, and it is necessary to ensure a certain interference between the two. So that the drive shaft of the motor is firmly joined to the rotor of the motor.
  • the rotor center hole and the drive shaft of the body motor are made circular, and the inner diameter of the rotor center hole is smaller than the outer diameter of the drive shaft, so that the drive shaft is formed when it is assembled into the rotor center hole. Fit.
  • the interference is naturally increased during the manufacturing process, thereby increasing the engagement force between the drive shaft and the rotor.
  • the interference force is too large, the deformation of the rotor body of the motor is easily caused during the assembly process, and the deformation of the rotor is easily transmitted to the magnet accommodating groove, thereby damaging the permanent accommodation in the magnet accommodating groove. magnet.
  • the yield in the manufacturing process of the motor or the compressor is lowered, and the performance of the motor or the compressor is degraded during the use of the later motor or the compressor, and the motor or the compressor is ineffective in the serious case.
  • the present invention provides a rotor for an electric machine including a rotor bore at a center thereof for engaging a rotor shaft.
  • the periphery of the inner bore of the rotor includes a recess and a projection having a surface that forms an interference fit with the rotor shaft.
  • the recesses and projections are alternately distributed along the circumference of the inner bore of the rotor.
  • the sum of the central angles corresponding to the portions of the recesses along the circumference of the inner bore of the rotor is less than 280 degrees.
  • the sum of the aforementioned central angles of the portions of the recesses along the circumference of the inner bore of the rotor is 180 degrees.
  • the recesses are distributed symmetrically about the circumference of the rotor along the circumference of the inner bore of the rotor.
  • the surface of the projection that forms an interference fit with the rotor shaft is a circular surface.
  • the second diameter of the circumscribed circle formed by the outermost point of the recess with respect to the inner bore of the rotor is larger than the first diameter of the circle formed by the convex portion of the inner bore of the rotor.
  • the circumscribed circle formed by the outermost point of the recess with respect to the inner bore of the rotor is concentric with the circle formed by the convex portion of the bore of the rotor.
  • the circumference of the recess includes an eccentric arc.
  • the eccentric arc includes a first eccentric arc and a second eccentric arc.
  • the center of the first eccentric arc and the center of the second eccentric arc are symmetrical with respect to a line passing through the center of the rotor and the midpoint of the recess in the circumferential direction of the inner bore of the rotor.
  • the number of the recesses is two or more.
  • the recess is trapezoidal, rectangular or V-shaped.
  • the rotor of the electric machine is a permanent magnet motor rotor.
  • the number of recesses is equal to the number of poles of the permanent magnet motor rotor.
  • the recess is aligned with the center of each permanent magnet in the radial direction of the rotor of the motor.
  • the rotor of the machine is an induction motor rotor.
  • the inner bore of the rotor is provided in the form of a combination of a convex portion and a concave portion, and when the rotor shaft is assembled, the convex portion of the inner bore of the rotor is interspersed with the rotor shaft. Cooperate.
  • the deformation generated during the interference fit between the rotor shaft and the inner bore of the rotor can be absorbed by the recess to prevent further spread of the deformation, thereby contributing to the overall stability of the rotor core.
  • the inner bore of the rotor formed to be combined with the convex portion and the concave portion is more advantageous for assembly in the inner bore of the rotor axial rotor, whereby the machining accuracy of the rotor shaft and the inner bore of the rotor can be reduced, thereby greatly reducing the manufacturing cost of the motor.
  • providing a recess in the inner bore of the rotor facilitates absorption of deformation generated during assembly of the rotor shaft and the rotor through the recess, thereby preventing deformation from being transmitted to the magnet receiving groove. , thereby protecting the permanent magnets.
  • FIG. 1 is a plan view showing a body motor including a rotor assembly according to an embodiment of the present invention
  • Figure 2 is a partial enlarged view of the body motor shown in Figure 1;
  • FIG. 3 is a view showing a permanent magnet including a rotor assembly according to another embodiment of the present invention. a schematic plan view of the motor;
  • Figure 4 is a partial enlarged view of the body motor shown in Figure 3;
  • Figure 5 is a plan view showing a body motor including a rotor assembly according to still another embodiment of the present invention.
  • Figure 6 is a partial enlarged view of the body motor shown in Figure 5;
  • Figure 7 is a plan view showing a rotor of a body motor according to the present invention.
  • Figure 8 is a plan view showing a rotor of an induction motor according to the present invention.
  • Figure 9 is a plan view showing the inner bore of a rotor of a motor rotor in accordance with still another embodiment of the present invention. detailed description
  • FIG 1 shows a plan view of an embodiment of a body motor 1 in accordance with the present invention.
  • a motor 1 according to the present invention includes a stator assembly 20 and a rotor assembly 10 rotatably received in a cavity of the stator assembly 20.
  • the rotor assembly 10 is positioned within the interior of the stator assembly 20 by the use of a rotor shaft, a rotor bearing and an end cap (not shown in Figure 1).
  • the stator assembly 20 defines a plurality of stator teeth 22 that extend in a radial direction thereof toward the interior of the stator assembly 20.
  • Each of the stator teeth 22 includes a neck portion extending from the main yoke of the stator assembly 20 and a generally " ⁇ " end. The sides of the adjacent two “ ⁇ ” ends are separated from each other by the slots.
  • a winding wire 24 of the stator assembly 20 is wound over the neck portion of each stator tooth 22 and provides a magnetic field for rotating the rotor assembly 10 when current is supplied.
  • the rotor assembly 10 is disposed in the interior of the stator assembly 20 and rotates about the rotor shaft under the urging of a magnetic field generated by the stator assembly 20.
  • the rotor assembly 10 includes a rotor core 14 and a plurality of permanent magnet groups 12 that are evenly arranged along the circumferential direction of the rotor core 14.
  • Each of the plurality of permanent magnet groups 12 is composed of a plurality of bodies, and is composed of three permanent magnets in the embodiment shown in FIGS. 1 and 2, respectively, in the middle of the permanent magnet group 12.
  • the 7 ⁇ 03 ⁇ 4 body 122 is formed by a permanent magnet having a lower coercive force, such as a ferrite permanent magnet
  • the second permanent magnet 124 is formed by a relatively higher permanent magnet than the first permanent magnet 122, such as a permanent magnet.
  • the three-section permanent magnet is formed in a U-shape or an arc that protrudes with respect to the center of the rotor core 14, that is, the first permanent magnet 122 located in the middle is located along the rotor core 14 with respect to the second permanent magnet 124 located on both sides. The radial direction is closer to the center of the rotor core 14.
  • a first magnetic isolation groove 144 is disposed between the end edge of the body group 12, that is, between the outer edge of the second body 124 away from the first body 122 and the outer periphery of the rotor core 14.
  • the first magnetic flux barrier 144 is disposed along an end of the second permanent magnet 124 near the outer circumference of the rotor core 14, and extends in a direction away from the first permanent magnet 122.
  • the first magnetic isolation groove 144 extends from the end edge of the second permanent magnet 124 along the outer periphery of the rotor core 14 in the extending direction of the permanent magnet group 12, and the outer circumference of the first magnetic isolation groove 144 along the rotor core 14
  • the edge of the edge extension has the same curvature as the outer circumference of the rotor core 14, that is, the portion of the first magnetic isolation groove 144 that extends along the outer circumference of the rotor core 14 is an arc having the same curvature as the outer circumference of the rotor core 14.
  • the portion of the first magnetic flux barrier 144 that extends along the outer periphery of the rotor core 14 may also have a linear shape, for example, the extension portion may have a substantially rectangular shape.
  • the end of the first magnetic isolation groove 144 extending away from the second permanent magnet 124 is adjacent to the corresponding first magnetic isolation groove 144 of the adjacent second permanent magnet 124 with a connecting rib 140 therebetween. Further, the width of the first magnetic isolation groove 144 in the radial direction of the rotor core 14 is 1 to 4 times that of the motor single-sided air gap. It should be noted that the motor single-sided air gap refers to the motor.
  • the inner radius of the stator assembly 20 is subtracted from the value of the outer radius of the rotor assembly 10 of the motor, i.e., the difference between the inner radius of the stator assembly 20 of the permanent magnet motor 1 and the outer radius of the rotor assembly 10 of the permanent magnet motor 1.
  • a protrusion 144-1 is provided in the first magnetic isolation groove 144 for supporting the edge of the second permanent magnet 124.
  • the projections 144-1 are advantageously disposed at corners of the second permanent magnet 124 that are further from the outer periphery of the stator core 14 to provide support for the second body 124.
  • a void 144-2 is formed at a position where the projection 144-1 is in contact with the corner of the second permanent magnet 124, which not only contributes to the protection of the edge portion of the permanent magnet but also facilitates the formation of the first magnetic isolation groove 142.
  • the first magnetic flux barrier 144 provided at the end of the body group 12 can optimize the magnetic resistance of the rotor magnetic circuit, control the distribution of the magnetic field lines of the magnetic field, and weaken the magnetic field lines. Degree of concentration, which can reduce the motor The pulsation of the output torque; the first magnetic isolation groove 144 can also reduce the reverse magnetic field magnetization of the easily demagnetized portion of the motor rotor, thereby protecting the second body 124 from being demagnetized.
  • the second permanent magnet 124 having a higher coercive force is employed at a position where the body group 12 is demagnetized by the influence of the magnetic field of the stator assembly 20, so that the permanent magnet group 12 has the position closest to the stator assembly 20
  • the higher anti-demagnetization capability is more advantageous for the permanent magnet motor 1 to operate under a large load condition without demagnetizing the edge portion of the permanent magnet group 12, resulting in a decrease or even failure of the function of the permanent magnet motor 1.
  • the first permanent magnet 122 having a relatively lower coercive force than the second permanent magnet 124 is used at a position far from the stator assembly 20 that is not easily demagnetized, which can reduce the first permanent while ensuring the magnetic energy output of the motor.
  • the magnet level of the magnet 122 can reduce the manufacturing cost of the permanent magnet motor 1.
  • a second magnetic flux barrier 146 is disposed between a side of the second permanent magnet 124 remote from the first permanent magnet 122 near the axis of symmetry of the permanent magnet group 12 and an outer periphery of the rotor core 14.
  • the second magnetic isolation groove 146 extends along the outer circumference of the rotor core 14 and has the same curvature as the outer circumference of the rotor core 14, or the second magnetic isolation groove 146 has edges extending parallel to each other, such as the second magnetic isolation groove.
  • 146 is a basic rectangular shape.
  • the distance between the two side edges of the second magnetic flux barrier 146 extending along the outer circumference of the rotor core 14 that is, the width of the second magnetic flux barrier 146 along the radial direction of the rotor core 14 is a single side of the motor 1 to 4 times the air gap.
  • each of the permanent magnet groups 12 in the body motor 1 is symmetrical about an axis extending in the radial direction of the rotor core 14.
  • the magnet motor 1 of the present invention between an outer periphery of a second rotor core 7 14 124 is further provided with respect to the set of permanent magnets 12 symmetry axis of the magnetic-eight slots 148 of the third compartment.
  • one or more third magnetic isolation grooves 148 may be provided according to actual needs, but advantageously four or less, for example, in the embodiment according to FIG. 1, for each The two permanent magnets 124 are provided with two third magnetic isolation grooves 148-1 and 148-2.
  • Each of the third magnetic flux barriers 148 is elongated, such as rectangular, or may have a rectangular shape with rounded ends, and the ends of each of the third magnetic isolation grooves 148 are rounded to facilitate The third magnetic isolation groove 148 is processed and manufactured.
  • the minimum width of each of the third magnetic isolation grooves 148 is 0.2 mm + 0.3 xa, and the maximum value is 0.2 mm + 0.3 xa, where a is a single-sided air gap of the motor 1 of the body.
  • the length of each of the third magnetic isolation grooves 148 depends on the minimum distance between the first end portion 1481 of each of the third magnetic isolation grooves 148 and the outer circumference of the rotor core 14 and the third magnetic isolation groove 148.
  • Second end 1482 and second permanent magnet of each of each The minimum distance between the edges of the body 124, the larger the above two distances, the smaller the length of the third magnetic isolation groove 148, and conversely, the longer the length of the third magnetic isolation groove 148.
  • the minimum distance between the first end portion 1481 of each of the third magnetic isolation grooves 148 and the outer circumferential edge of the rotor core 14 is 0.3 to 1.5 times the one-sided air gap of the motor
  • the third magnetic isolation groove 148 The minimum distance between the second end 1482 of each of the second permanent magnets 124 and the edge of the second permanent magnet 124 is 0.3 to 1.5 times the unilateral air gap of the motor.
  • the relative angle between adjacent two of the third magnetic isolation slots 148 located adjacent each second permanent magnet 124 is five. To 30. The relative angle is more advantageously 10. To 18. . As in the embodiment shown in FIG. 1, the third magnetic isolation groove 148-1 and the third magnetic isolation groove 148-2 are advantageously formed as 5. To 30. The relative angle between the more favorable terrain becomes 10. To 18. The relative angle between. In the following embodiments, the third magnetic isolation groove 148 is formed in the same manner as the embodiment unless otherwise stated.
  • a fourth magnetic flux barrier 142 is disposed between the first permanent magnet 122 and the second permanent magnet 124 of each permanent magnet group 12. That is, a fourth magnetic isolation groove 142 is disposed between the second permanent magnet 124 and the second permanent magnet 124 on both sides of the first permanent magnet 122.
  • the fourth magnetic isolation groove 142 may be circular, square, and other shapes.
  • the magnetic groove 142 is formed with a protruding portion 142-1, and the protruding portion 142-1 located in the fourth magnetic flux blocking groove 142 is for abutting against the ends of the first permanent magnet 122 and the second permanent magnet 124, thereby
  • the first permanent magnet 122 and the second body 124 provide support and fixation.
  • the above-mentioned projections 142-1 provide support for the bodies on both sides thereof so that the body is more firm and stable after being mounted in the stator core, and no displacement or oscillation occurs during the operation of the permanent magnet motor 1.
  • a gap 142-2 is formed at a position where the projections 142-1 are in contact with the corners of the first permanent magnet 122 and the second permanent magnet 124, which is advantageous not only for protecting the edge portion of the permanent magnet but also for facilitating the fourth portion.
  • the area of each of the fourth magnetic flux barriers 142 is 0.05 to 0.15 times the area of the first permanent magnets 122.
  • the fourth magnetic isolation groove 142 can further optimize the magnetic resistance of the magnetic circuit of the rotor assembly 10, and optimize the distribution of the magnetic lines of force, without affecting the magnetic field strength of the excitation magnetic field, thereby ensuring the maximum utilization of the magnetic energy of the permanent magnet, thereby ensuring the motor Maximize efficiency.
  • a fifth magnetic isolation groove 149 is formed on a side of the adjacent two first magnetic isolation grooves 144 which is closer to the center of the rotor core 14, and the fifth magnetic isolation groove 149 has The outer circumference of the rotor core 14 may have two sides of the same arc, or may have two sides parallel to each other.
  • the fifth magnetic isolation groove 149 also has curved sides of the same arc, when the first magnetic isolation grooves 144 have mutual When the sides are parallel, the fifth magnetic flux barrier 149 also has sides parallel to each other.
  • the width of the fifth magnetic flux barrier 149 in the radial direction of the rotor core 14 may be the same as or different from that of the first magnetic flux barrier 144.
  • the width of the fifth magnetic isolation groove 149 in the radial direction of the rotor core 14 is 1 to 4 times the one-sided air gap of the motor.
  • the fifth magnetic isolation groove 149 can assist the first magnetic isolation groove 144 to optimize the magnetic field distribution of the end portion of the second magnetic isolation groove 124, further reduce the pulsation of the motor torque output and improve the anti-demagnetization capability of the permanent magnet group 12.
  • the magnetic field distribution and the hysteresis magnetic field commutation can be effectively restrained without reducing the magnetic field output, thereby reducing the magnetic field change and thereby reducing the motor output rotation.
  • the pulsation of the moment can be effectively restrained without reducing the magnetic field output, thereby reducing the magnetic field change and thereby reducing the motor output rotation. The pulsation of the moment.
  • each set of permanent magnets 12 in the rotor assembly 10 is formed in a "one" shape including a first permanent magnet 122 in the middle and a second permanent magnet 124 on either side of the first permanent magnet 122.
  • the first permanent magnet 122 located at the center of the permanent magnet group 12 is formed by a magnet having a lower coercive force
  • the second permanent magnet 124 located at both sides of the permanent magnet group 12 is opposite to the first permanent magnet 122 by a coercive force.
  • Higher magnets are formed.
  • three pairs of third magnetic isolation grooves 148-1, 148-2, and 148-3 that are symmetric about the axis of symmetry of the permanent magnet group 12 are formed.
  • the slope of each of the three pairs of third magnetic isolation grooves 148 with respect to the "one"-shaped permanent magnet group 12 is sequentially increased from the edge to the center of the permanent magnet group 12.
  • the length and width of the three pairs of third magnetic isolation grooves 148 in this embodiment are the same as those described above with reference to Figs. 1 and 2, and are not described herein.
  • the relative angle between each adjacent two third magnetic isolation grooves 148 is also the same as the embodiment shown in Figs. 1 and 2, for example, the relative angle is five. To 30. , more advantageously 10 . To 18. .
  • first magnetic isolation groove 144 located at the end of the second permanent magnet 124 is formed to have a first edge portion 1441 parallel to the adjacent edge of the second permanent magnet 124, and is further formed with the first edge portion
  • the first edge portion 1442 of the 1441 phase is perpendicular
  • the side of the first magnetic isolation groove 144 adjacent to the outer circumference of the rotor core is formed in an arc shape having the same curvature as the outer circumference of the rotor core 14, or may be formed in a straight line shape.
  • a connecting rib 140 is formed between the adjacent two first magnetic isolation grooves 144. In this embodiment, the connecting rib 140 is substantially rectangular.
  • a connection is formed between the first edge portion 1441 of the first magnetic isolation groove 144 and the adjacent edge of the second permanent magnet 124.
  • the ribs 125, the ends of the second permanent magnets 124 abut against the walls of the connecting ribs 125, thereby providing support and fixation for the body set 12.
  • a gap 123 is also formed between the corner of the second body 124 and the connecting rib 125, which not only facilitates protecting the corner of the second permanent magnet 124, but also facilitates the groove for accommodating the permanent magnet group 12. machining.
  • the anti-demagnetization capability of the permanent magnet group 12 can be improved while ensuring that the permanent magnet group 12 has a certain magnetic energy, and The amount of magnets is reduced, thereby reducing the production cost of the permanent magnet motor 1.
  • the magnetic isolation groove disposed in the rotor core 14 can optimize the distribution of magnetic lines of force in the rotor core, weaken the concentration of magnetic lines of force, and further enhance the anti-demagnetization capability of the permanent magnet.
  • the "one" shaped permanent magnet is more conducive to the processing and manufacturing of the motor, thereby further reducing the manufacturing cost.
  • a third embodiment of a permanent magnet motor 1 according to the present invention is shown in Figs. 5 and 6.
  • the permanent magnet group 12 is disposed in a "V" shape, including two first permanent magnets 122 at the bottom of the V shape and two second permanent magnets 124 at the top of the V shape, the first ⁇
  • the body 122 employs a magnet having a lower coercive force
  • the second body 124 employs a magnet having a higher coercive force than the first permanent magnet 122.
  • the first magnetic isolation groove 144, the second magnetic isolation groove 146, and the third magnetic isolation groove 148 are provided in the same manner as the embodiment shown in FIGS. 1 and 2, and in the first magnetic isolation groove.
  • the protrusion 144-1 and the gap 144-2 are formed in 144, and are not described herein.
  • a fifth magnetic isolation groove 149 as provided in the first embodiment may also be provided in this embodiment.
  • a sixth magnetic isolation groove 145 is formed between adjacent ends of the two first permanent magnets 122 of the embodiment, that is, a sixth magnetic isolation groove 145 is formed at the bottom of the V shape, and the sixth magnetic isolation groove 145 extends along the length direction of the first permanent magnet 122, and a connecting rib 147 is formed at the bottom of the V shape, that is, the connecting rib 147 will be located at the two ends of the two first permanent magnets 122, respectively.
  • the magnetic isolation grooves 145 are spaced apart.
  • a protrusion 145-1 is formed at a position adjacent to the first permanent magnet 122 of each of the sixth magnetic isolation grooves 145 for supporting the first permanent magnet 122 to prevent it during the operation of the permanent magnet motor 1.
  • a rotor rivet hole 16 is formed at a position of the connecting rib 147 away from the center of the rotor in the radial direction of the rotor core 14 of the permanent magnet motor 1 for riveting the rotor lamination in the radial direction of the rotor core 14 at the connecting rib 147
  • a magnetic isolation hole 18 is formed at a position close to the center of the rotor.
  • the rotor rivet hole 16 and the magnetic flux barrier 18 are disposed on both sides of the connecting rib 147 in the radial direction of the rotor core 14, the rotor rivet hole 16 being closer to the outer circumference of the rotor core 14, and the magnetic isolation hole 18 being closer to the rotor The center of the iron core 14.
  • the magnetic holes 18 may be circular, square or other shapes having an area of 0.05 to 0.15 times the area of each of the first permanent magnets 122.
  • the permanent magnet motor 1 according to this embodiment has a higher structural strength, making it more suitable for high-speed operation, and increasing the ratio of the cross-axis and the direct-axis inductance of the motor 1, thereby increasing the salient pole effect of the motor.
  • the rotor inner bore 15 for mounting the rotor shaft of the motor employs a stepped composite circle, as shown in Figs. 1 and 3, that is, a direction is formed on the peripheral wall of the circular rotor inner bore 15.
  • such a stepped compound circular inner rotor hole 151 can also be employed in the rotor inner bore 15 of the permanent magnet motor 1 shown in Fig. 5.
  • the stepped compound circular inner rotor hole 151 can make the rotor shaft and the rotor core 14 form-fit, without assembling the rotor shaft and the rotor core 14 with an interference fit, thereby avoiding the use of the rotor shaft and the rotor core 14 The risk of breakage of the permanent magnet due to deformation of the rotor core 14 during assembly with interference fit.
  • the permanent magnet motor disclosed herein has nine stator teeth 22, whereby nine stator coil accommodating grooves 26 are formed in the stator assembly 20; in addition, in the rotor assembly 10
  • the permanent magnet group 12 is provided with 6 poles, that is, 6 individual groups 12 are provided, thereby forming 6 sets of magnetic poles, where each of the 6 individual groups 12 is a segmented combined permanent magnet.
  • the combined design of such nine stator turns accommodating slots 26 and 6 individual groups 12 according to the present invention is referred to as a 6-pole 9-slot concentrated roll design, which is similar to the prior art 4-pole distributed volume and 4-pole concentrated volume design. Compared with the advantages of high motor torque density, small torque output ripple, high efficiency and low cost.
  • the center angle of the outermost edge of the end portion of each of the permanent magnet groups 12 in the rotor core 14 is defined as the pole arc angle of each pole group 12,
  • the center angle occupied by each of the sets of permanent magnets 12 with respect to the entire circumference of the rotor core 14 is defined as the angle of the body group 12, advantageously, the pole arc angle of each pole group 12 is The angle of the polar body group 12 is 0.6 times to 0.95 times.
  • the central angle of the outermost edge of the second permanent magnet 124 of each pole permanent magnet group 12 in the rotor core 14 is the arc angle of each pole group 12.
  • the angle of the eye of each permanent magnet group 12 is 360.
  • each pole permanent magnet group 12 is from the center of the rotor assembly 10 by a distance of 0.15 to 0.35 times the outer diameter of the stator assembly 20 of the permanent magnet motor 1. This arrangement of the permanent magnet assembly 12 enables the stator assembly 20 to have sufficient strength while ensuring that the stator assembly 20 has a certain amount of magnetic energy.
  • the magnetic flux barrier disposed between the end of the permanent magnet and the outer circumference of the rotor core can optimize the magnetic field distribution and effectively constrain the commutation of the hysteresis magnetic field, thereby reducing the variation of the magnetic field And thereby reduce the ripple of the motor output torque.
  • the rotor assembly having the multi-stage permanent magnet according to the present invention can effectively overcome the problem that the rotor of the permanent magnet motor is easily demagnetized by providing a permanent magnet having a high coercive force at a position where demagnetization is liable to occur, and Providing a permanent magnet having a lower coercive force at a position where the influence of demagnetization is lighter can greatly reduce the material cost of the rotor of the motor.
  • the distribution of the magnetic reluctance of the magnetic circuit is changed by the magnetic isolation groove, and the intensity of the magnetic lines in the magnetic field is reduced, thereby further improving the anti-demagnetization capability of the permanent magnet.
  • the structure of the rotor inner bore 15 for mounting the rotor shaft of the motor will be described in detail below with reference to Figs. 7-9.
  • the inner bore 15 of the rotor is generally circular, and the rotor shaft assembled therewith is circular.
  • the rotor inner bore 15 includes a convex portion 152 that forms an interference fit with the rotor shaft and a concave portion 151 that is recessed toward the inner portion of the rotor core 14 of the rotor with respect to the convex portion 152, wherein the convex portion 152 has an interference fit with the rotor shaft.
  • the recess 151 may be provided with one or more along the circumferential direction of the inner bore 15 of the rotor.
  • the recess 151 and the projection 152 are alternately distributed, and two or more recesses 151 are provided along the circumferential direction of the inner bore 15 of the rotor.
  • the recess 151 in the circumferential direction of the inner bore 15 of the rotor, it is possible to cause an interference fit between the rotor shaft and the convex portion 152 of the inner bore 15 of the rotor during assembly of the rotor shaft and the inner bore 15 of the rotor.
  • the deformation of the rotor body is conducted to the recess 151 without further conduction to a portion of the rotor body remote from the rotor bore 15.
  • the assembled motor is a body motor, as shown in FIG.
  • the deformation of the rotor body at the magnet accommodating groove can be avoided, and the magnet accommodating groove is avoided during the assembly of the rotor shaft and the rotor inner hole 15. Destruction and damage to the body 12.
  • the assembled motor is an induction motor, as shown in FIG. 8
  • deformation of the rotor body at the induction groove distributed along the outer circumference of the rotor core 14 can be avoided, thereby facilitating reinforcement of the joint between the rotor laminations, and reducing The rate of scrap generated by the assembly of the rotor shaft.
  • the sum of the central angles corresponding to the portions occupied by the recesses 151 in the circumferential direction of the entire inner bore 15 of the rotor is less than 280 degrees.
  • the sum of the central angles described above is 180 degrees.
  • the sum of the central angles corresponding to the plurality of concave portions 151 should satisfy the above relationship, that is, the sum should be less than 280 degrees, that is, the convex portion 152
  • the sum of the corresponding central angles should be greater than 80 degrees.
  • the above-described distribution ratio of the convex portion 152 in the circumferential direction of the inner bore 15 of the rotor ensures a sufficient engagement force between the rotor shaft and the inner bore 15 of the rotor to maintain the relationship between the rotor shaft and the rotor core 14 during operation of the motor. strength.
  • each recess 151 is ⁇
  • the six recesses 151 are The sum of the corresponding central angles, 6 ⁇ , should be less than 280 degrees.
  • the six recesses 151 are symmetrically distributed along the circumference of the rotor inner bore 15 with respect to the center ⁇ of the rotor. It is contemplated that any number of recesses 151 may be symmetrically distributed about the center of the rotor along the circumference of the inner bore 15 of the rotor. Of course, any other number of recesses 151 may be distributed along the circumference of the rotor inner bore 15 or unevenly.
  • the convex portion 152 and the concave portion 151 which form the inner hole 15 of the rotor are both circular arc shapes, and a circle formed by the circumference of the convex portion 152 and a circle formed by the circumference of the concave portion 151 For concentric circles.
  • the arcuate convex portion 152 and the concave portion 151 are easy to manufacture, which can greatly reduce the manufacturing cost of the motor rotor.
  • the number of the recesses 151 is set to be equal to the number of magnetic poles in the rotor 10, and each recess 151 is aligned with the center position of the one-pole permanent magnet 12.
  • the convex portion 152 is aligned with the portion of the motor rotor core 14 between the two-pole permanent magnets 12, thereby making it possible to deform the multi-directional two-pole body at the convex portion 152 when the rotor shaft and the inner rotor hole 15 are assembled.
  • the partial transfer between the 12 is transmitted as little as possible in the direction of the magnet accommodating groove, thereby further avoiding damage to the body 12 housed in the magnet accommodating groove.
  • the second diameter D2 of the circle formed by the circumference of the curved concave portion 151 is larger than the first diameter D1 of the circle formed by the circumference of the curved convex portion 152.
  • the rotor inner bore 15 thus provided can reduce the machining accuracy of the rotor inner bore 15, and at the same time reduce the machining accuracy of the rotor shaft engaged with the rotor inner bore 15, thereby greatly reducing the manufacturing cost of the motor. Furthermore, the rotor according to the present invention will be able to be more capable of having the same interference force between the rotor shaft and the inner bore of the rotor as compared to the prior art motor rotor having a completely circular rotor bore. The rotor shaft is easily assembled, so that the scrap rate generated during the assembly process can be reduced.
  • the portion forming the concave portion 151 of the rotor inner hole 15 of the motor rotor 10 and the portion forming the convex portion 152 of the rotor inner hole 15 are each shown as a circular arc shape, it may also be employed. Other shapes.
  • the recess 151 may be formed in a substantially trapezoidal shape, a substantially rectangular shape, a V shape, or the like. It suffices that the outer diameter of the rotor shaft is larger than the first diameter D1 at the convex portion 152 of the inner rotor hole 15, and the second diameter D2 at the concave portion 151 is larger than the first straight outer diameter D1 at the convex portion 152.
  • the concave portion 151 of the inner rotor hole 15 is formed to include an eccentric arc, and the eccentric arc forming the concave portion 151 includes the first eccentric arc 153.
  • the second eccentric arc 154, the intersection of the first eccentric arc 153 and the second eccentric arc 154 is the apex of the concave portion 151, that is, the concave portion 151 is at the intersection of the first eccentric arc 153 and the second eccentric arc 154
  • the distance from the center O of the rotor inner bore 15 is the farthest.
  • the deformation occurring in the vicinity of the inner bore 15 of the rotor when assembling the rotor shaft can be better absorbed by the material located at the intersection of the first eccentric arc 153 and the second eccentric arc 154.
  • the first eccentric arc 153 and the second eccentric arc 154 have a center that is offset with respect to the center O of the convex portion 152.
  • the center O1 of the first eccentric arc 153 and the center 02 of the second eccentric arc 154 are symmetrical with respect to a line passing through the center O of the rotor 10 and the midpoint of the recess 151 in the circumferential direction of the inner bore 15 of the rotor. .
  • the eccentricity of the center O1 of the first eccentric arc 153 and the center 02 of the second eccentric arc 154 with the center O of the rotor 10 and the radii of the first eccentric arc 153 and the second eccentric arc 154 may be determined as A concave portion 151 having a certain depth may be formed between the adjacent two convex portions 152.
  • the second diameter D2 of the circumcircle formed by the outermost point of the recess 151 with respect to the inner bore 15 of the rotor is larger than the first diameter D1 of the circle formed by the convex portion 152 of the inner bore 15 of the rotor.
  • the distance between the intersection of the first eccentric arc 153 and the second eccentric arc 154 symmetrically distributed about the center O of the inner bore 15 of the rotor is the second diameter D2.
  • the convex portion 152 of the inner bore 15 of the rotor is formed by a base circle having a first diameter D1, which is indicated by a broken line in the figure. The base circle is shown, and the convex portion 152 forms an interference fit with the rotor shaft of the motor rotor.
  • This design of the inner bore 15 of the rotor also serves to absorb the deformation generated during the assembly process with the rotor shaft, thereby avoiding the problem that the deformation of the rotor body is further transmitted to other parts of the rotor.
  • the requirements for the machining accuracy of the inner bore of the rotor and the rotor shaft can be reduced, and the interference fit in the inner bore of the rotor axial rotor can be facilitated.
  • the permanent magnet motor rotor it is also possible to reduce the deformation of the rotor body against the permanent magnets accommodated in the magnet accommodating grooves, thereby avoiding damage to the 7 body.
  • the inner bore of the rotor is provided in the form of a combination of a convex portion and a concave portion, and when the rotor shaft is assembled, the convex portion of the inner bore of the rotor is interspersed with the rotor shaft. Cooperate.
  • the deformation generated during the interference fit between the rotor shaft and the inner bore of the rotor can be absorbed by the recess to prevent further spread of the deformation, thereby contributing to the overall stability of the rotor core.
  • the inner bore of the rotor formed to be combined with the convex portion and the concave portion is more advantageous for assembly in the inner bore of the rotor axial rotor, whereby the machining accuracy of the rotor shaft and the inner bore of the rotor can be reduced, thereby greatly reducing the manufacturing cost of the motor.

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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

一种电机转子(10)包括位于其中心处的转子内孔(15),转子内孔(15)用于接合转子轴。转子内孔(15)的周缘包括凹部(151)和凸部(152),凸部(152)具有与转子轴形成过盈配合的表面。通过将转子内孔(15)设置成凸部(152)和凹部(151)相结合的形式,并且在与转子轴装配时使得转子内孔(15)的凸部(152)与转子轴形成过盈配合,可以使得在转子轴与转子内孔(15)的过盈配合过程中产生的变形被凹部(151)吸收,避免变形的进一步扩散,从而有利于转子铁心的整体的稳固性。

Description

电机转子
相关申请的交叉引用
本申请要求于 2013 年 5 月 7 日提交中国专利局的、 申请号为 201320242413.1、发明名称为 "电机转子", 于 2012年 12月 10日提交 中国专利局的、 申请号为 201210528450.9、 发明名称为 "转子组件和 包括该转子组件的^ 体电机"以及于 2012年 12月 10日提交中国专 利局的、 申请号为 201220676341.7、 发明名称为 "转子组件和包括该 转子组件的 体电机" 的中国专利申请的优先权, 上述专利申请的 全部内 过参引结合在本申请中。 技术领域
本发明涉及一种电机转子, 更具体地, 涉及一种能够改善转子的 转子内孔与转子轴之间的 it^装配的电机转子。 背景技术
目前, 无刷永磁体直流电机因其效率高、 转矩密度大、 性能可 靠等优点而广泛应用于新能源汽车、 变频空调压缩机等领域。但是, 在无刷永磁体直流电机的操作过程中, 由于定子铁心的齿部与槽口 之间的磁阻差异较大, 导致定子对由定子绕组产生的励磁磁场的传 递在不同的位置具有较大的不同, 由此导致电机的输出转矩产生脉 动。
另外, 目前市场上销售的变频压缩机的驱动电机通常采用 4极分 布卷或者 4极集中卷结构设计, 即转子采用 4组 体, 即 4极, 而 定子线圏采用沿定子周向方向均匀分布的若干(如 40个)小的线圏或 者为沿定子周向方向均匀分布的数个(如 6个)集中的线圏。 上述两 种永磁体电机的缺点在于其输出转矩脉动较大, 由此导致电机在运转 过程中噪声较大, 另外其效率较低, 特别是低速运行时效率更低。
在无刷永磁体直流电机的使用过程中遇到特定工况和突发故障 时, 其会出现高温或过电流现象, 此时磁体可能会发生退磁现象。 一 旦无刷永磁体直流电机的磁体发生退磁, 则电机将会丧失部分性能, 甚至失效。 因此无刷永磁体直流电机所采用的磁体需要具备一定的耐 高温和抗退磁能力。
在永磁体电机中, 由于磁场在转子铁心中的密集程度不同, 因此 位于转子铁心的不同部位中的永磁体对于抗退磁能力的要求也不相 同。 在现有永磁体电机中, 为了满足永磁体所需要的最大抗退磁能力, 通常采用等级较高的永磁体。 这种情况下的不足之处在于在不需要具 有较大抗退磁能力的位置采用了高等级的永磁体, 从而增加了永磁体 电机的材料成本。
此外, 在变频压缩机所使用的永磁体电机中, 永磁体电机的驱动 轴一般通过过盈配合装配在永磁体电机的转子的中心孔内, 并且需要 确保两者之间具有一定的过盈力, 从而使电机的驱动轴与电机转子牢 固地接合在一起。
一般情况下, ^体电机的转子中心孔和驱动轴均做成圆形, 并 使得转子中心孔的内径小于驱动轴的外径, 从而在将驱动轴装配到转 子中心孔内时使其间形成过盈配合。 为了防止电机在承受较大载荷时 驱动轴与转子中心孔脱离, 则自然地会在制造过程中增大过盈量, 从 而增大驱动轴与转子之间的接合力。 但是, 由于过盈力太大, 在装配 过程中非常容易引起电机转子本体的变形, 而转子的变形很容易被传 导至磁体容置槽处, 从而会损坏容置在磁体容置槽内的永磁体。 从而 使得在电机或压缩机的制造过程中的成品率降低, 并且在后期的电机 或压缩机的使用过程中导致电机或压缩机的性能下降, 严重时导致电 机或压缩机失效。
为了防止转子与驱动轴装配时的过盈配合带来的转子的过度变 形, 通常在制造过程中需要将转子中心孔的尺寸公差和驱动轴的尺寸 公差做的很小以控制装配的过盈量。 但是小的尺寸公差意味着需要高 的加工精度, 这必然会导致加工成本的上升。 因此, 现有技术中存在对一种能够在保证电机的驱动轴与电机转 子的接合力的前提下减小驱动轴和电机转子在装配过程中的变形的电 机。 发明内容
本发明提供一种电机转子, 该电机转子包括位于其中心处的转子 内孔, 转子内孔用于接合转子轴。 其中, 转子内孔的周缘包括凹部和 凸部, 凸部具有与转子轴形成过盈配合的表面。
根据本发明的电机转子的一个实施例, 凹部与凸部沿转子内孔的 周缘交替地分布。
根据本发明的电机转子的再一个实施例, 凹部沿转子内孔的周缘 所占据的部分对应的圆心角的总和小于 280度。 有利地, 凹部沿转子 内孔的周缘所占据的部分对应的上述圆心角的总和为 180度。
在根据本发明的电机转子的另一个实施例中, 凹部沿转子内孔的 周缘关于转子的中心对称地分布。
在根据本发明的电机转子的再一个实施例中, 凸部的与转子轴形 成过盈配合的表面为圆 ¾ ^面。
根据本发明的电机转子的又一个实施例, 通过凹部的相对于转子 内孔的最外侧点形成的外接圆的第二直径大于由转子内孔的凸部形成 的圆的第一直径。
在根据本发明的电机转子的还一个实施例中, 通过凹部的相对于 转子内孔的最外侧点形成的外接圆与由转子内孔的凸部形成的圆为同 心圆。
根据本发明的电机转子的另一个实施例, 凹部的周缘包括偏心圆 弧。
在根据本发明的电机转子的又一个实施例中, 偏心圆弧包括第一 偏心圆弧和第二偏心圆弧。 根据本发明的电机转子的还一个实施例, 第一偏心圆弧的圆心和 第二偏心圆弧的圆心关于通过转子的中心和凹部沿转子内孔的周向方 向的中点的直线对称。
根据本发明的电机转子的再一个实施例, 在转子内孔的周缘上的 点中, 第一偏心圆弧与第二偏心圆弧的交点与转子内孔的中心的距离 在根据本发明的电机转子的另一个实施例中, 凹部的个数为 2个 或更多个。
根据本发明的电机转子的再一个实施例, 凹部为梯形、 矩形或 V 形。
在根据本发明的电机转子的又一个实施例中, 电机转子为永磁体 电机转子。
根据本发明的电机转子的还一个实施例, 凹部的数量与永磁体电 机转子的磁极数相等。
在根据本发明的电机转子的再一个实施例中, 凹部沿电机转子的 径向方向与每极永磁体的中心对准。 在根据本发明的电机转子的另一个实施例中, 电机转子为感应电 机转子。
在采用根据本发明的转子内孔的电机转子中, 通过将转子内孔设 置成凸部和凹部相结合的形式, 并且在与转子轴装配时使得转子内孔 的凸部与转子轴形成过盈配合。 这样, 可以使得在转子轴与转子内孔 的过盈配合过程中产生的变形被凹部吸收, 避免变形的进一步扩散, 从而有利于转子铁心的整体的稳固性。 另外, 形成为凸部和凹部相结 合的转子内孔更加有利于转子轴向转子内孔中的装配, 由此可以降低 转子轴和转子内孔的加工精度, 从而大大地降低电机的制造成本。 对 于采用根据本发明的结构的永磁体电机转子来说, 在转子内孔中设置 凹部有利于使转子轴与转子的装配过程中产生的变形通过凹部进行吸 收, 从而避免变形传导至磁体容置槽, 由此起到保护永磁体的作用。 附图说明
通过以下参照附图给出的对本发明的具体实施方式的详细描 述, 将更加容易地理解本发明的特征和优点, 在附图中:
图 1是示出包括根据本发明的一个实施例的转子组件的 体电 机的平面示意图;
图 2是图 1中示出的 体电机的局部放大图;
图 3是示出包括根据本发明的另一个实施例的转子组件的永磁体 电机的平面示意图;
图 4是图 3中示出的 体电机的局部放大图;
图 5是示出包括根据本发明的再一个实施例的转子组件的 体 电机的平面示意图;
图 6是图 5中示出的 体电机的局部放大图;
图 7是根据本发明的 体电机转子的平面示意图;
图 8是根据本发明的感应电机转子的平面示意图; 以及
图 9是根据本发明的又一个实施例的电机转子的转子内孔的平面 示意图。 具体实施方式
下面参照附图对根据本发明的示例性实施例进行详细描述。 对 示例性实施例的描述仅仅是出于示范目的, 而绝不是对本发明及其应 用或用法的限制。
参考附图, 图 1示出根据本发明的 体电机 1的一个实施例的 平面示意图。根据本发明的^体电机 1包括定子组件 20和旋转地容 置在定子组件 20的内腔中的转子组件 10。 根据构造旋转电机的现有 技术, 通过使用转子轴、 转子轴承和端盖(图 1 中未示出)将转子组 件 10定位在定子组件 20的内腔内。
定子组件 20限定了沿其径向方向向定子组件 20的内腔延伸的多 个定子齿 22。 每个定子齿 22包括从定子组件 20的主轭延伸出的颈状 部分和通常为 "Τ形" 的端部。 相邻的两个" Τ形" 端部的侧面通过槽 口相互分离。定子组件 20的绕组线圏 24绕制在每个定子齿 22的颈状 部分上, 并在被供给电流时提供用于使转子组件 10旋转的磁场。
转子组件 10设置在定子组件 20的内腔中, 并在定子组件 20产生 的磁场的推动作用下围绕转子轴旋转。 转子组件 10 包括转子铁心 14 和沿转子铁心 14的周向均匀地布置的多个永磁体组 12。 所述多个永 磁体组 12中的每一个均由多 ^ 体组成,在如图 1和图 2所示的实 施例中由三段永磁体组成,分别为位于永磁体组 12的中部的第一永磁 体 122和位于 ? ^体组 12的端部的两段第二 ? ^体 124, 其中, 第一 7^0¾体 122采用矫顽力较低的永磁体形成, 比如铁氧体永磁体, 而第 二永磁体 124采用矫顽力与第一永磁体 122相比相对更高的永磁体形 成, 比如稀土永磁体。 有利地, 三段永磁体形成为相对于转子铁心 14 的中心突出的 U形或弧形, 即, 位于中间的第一永磁体 122相对于位 于两侧的第二永磁体 124沿转子铁心 14的径向方向更靠近转子铁心 14 的中心。
在^ C 体组 12的端部边缘, 也就是在第二 7^ 体 124的远离第一 体 122的外侧边缘与转子铁心 14的外周缘之间设置有第一隔磁槽 144。 第一隔磁槽 144沿第二永磁体 124的靠近转子铁心 14的外周缘 的端部布置,并且沿远离第一永磁体 122的方向延伸。第一隔磁槽 144 在永磁体组 12的延伸方向上从第二永磁体 124的端部边缘开始沿着转 子铁心 14的外周缘延伸, 第一隔磁槽 144的沿着转子铁心 14的外周 缘延伸的边缘具有与转子铁心 14的外周缘相同的弧度,即第一隔磁槽 144的沿着转子铁心 14的外周缘延伸的部分是与转子铁心 14的外周缘 具有相同弧度的弧形。 当然, 第一隔磁槽 144的沿着转子铁心 14的外 周缘延伸的部分也可以具有直线形状, 比如, 该延伸部分可以为大致 的矩形形状。 第一隔磁槽 144的延伸远离第二永磁体 124的端部与相 邻的第二永磁体 124的相应的第一隔磁槽 144紧邻, 其间具有连接肋 140。 进一步地, 第一隔磁槽 144在转子铁心 14的径向方向上的宽度 为电机单边气隙的 1倍至 4倍, 在此需要说明的是, 电机单边气隙指 的是电机的定子组件 20的内半径减去电机的转子组件 10的外半径的 值,即永磁体电机 1的定子组件 20的内半径与永磁体电机 1的转子 组件 10的外半径之差。 有利地, 在第二永磁体 124的远离第一永磁 体 122的端部处, 在第一隔磁槽 144内设置有凸出部 144-1, 用于支承 第二永磁体 124的边缘,该凸出部 144-1有利地设置在第二永磁体 124 的距离定子铁心 14的外周缘更远的角部处,从而为第二 体 124提 供支承。 在凸出部 144-1与第二永磁体 124的角部接触的位置处形成 有空隙 144-2, 这不仅有利于保护永磁体的边缘部, 而且还便于第一隔 磁槽 142的成形。
在根据本发明的上述实施例的 体电机 1 中, 由于设置在^ 体组 12的端部的第一隔磁槽 144可以优化转子磁路的磁阻,控制磁场 磁力线的分布, 并且削弱磁场磁力线的集中程度, 从而能够减小电机 的输出转矩的脉动; 第一隔磁槽 144还可以降低电机转子的易退磁部 位的逆磁场磁化强度, 由此保护第二 体 124不被退磁。 由于 体组 12在易于受到定子组件 20的磁场的影响而退磁的位置处采用了 具有较高矫顽力的第二永磁体 124, 从而使得永磁体组 12在最靠近定 子组件 20的位置处具有更高的抗退磁能力, 更加有利于永磁体电机 1 在大负荷状态下运转,而不会使永磁体组 12的边缘部分退磁而导致永 磁体电机 1的做功能力下降或者甚至失效。同时在距离定子组件 20更 远的不易退磁的位置处采用矫顽力与第二永磁体 124相比相对更低的 第一永磁体 122, 这能够在确保电机磁能输出的情况下降低第一永磁 体 122的磁铁等级, 从而能够降低永磁体电机 1的制造成本。
在第二永磁体 124的远离第一永磁体 122的端部的靠近永磁体组 12的对称轴线的一侧与转子铁心 14的外周缘之间设置有第二隔磁槽 146。 同样, 第二隔磁槽 146沿转子铁心 14的外周缘延伸并与转子铁 心 14的外周缘具有相同的弧度,或者第二隔磁槽 146具有相互平行地 延伸的边缘, 比如第二隔磁槽 146为基本的矩形形状。 进一步地, 第 二隔磁槽 146的沿转子铁心 14的外周缘延伸的两个侧边之间的距离, 即第二隔磁槽 146沿转子铁心 14的径向方向的宽度,为电机单边气隙 的 1倍至 4倍。
此外, 从图 1、 图 3和图 5中可以看出, 体电机 1中的每个永 磁体组 12关于沿转子铁心 14的径向方向延伸的轴线对称。 根据本发 明的 体电机 1在其第二 7 体 124与转子铁心 14的外周缘之间还 设置有相对于永磁体组 12的对称轴线成八字形的第三隔磁槽 148。 对 于每个第二永磁体 124, 可以根据实际需要设置一个或更多个第三隔 磁槽 148, 但有利地为 4个以下, 例如在根据图 1所示的实施例中, 对于每个第二永磁体 124设置有两个第三隔磁槽 148-1和 148-2。 第三 隔磁槽 148中的每一个均为细长形, 比如为矩形, 或者可以为两端具 有圆角的矩形, 第三隔磁槽 148中的每一个的两端形成为圆角可以便 于第三隔磁槽 148的加工制造。 第三隔磁槽 148中的每一个的宽度的 最小值为 0.2mm+0.3 x a, 最大值为 0.2mm+0.3 x a, 其中 a为^ 0¾体 电机 1的单边气隙。 第三隔磁槽 148中的每一个的长度取决于第三隔 磁槽 148中的每一个的第一端部 1481与转子铁心 14的外周缘之间的 最小距离以及第三隔磁槽 148中的每一个的第二端部 1482与第二永磁 体 124的边缘之间的最小距离,上述两个距离越大,则第三隔磁槽 148 的长度越小, 反之, 第三隔磁槽 148的长度则越大。 在此, 第三隔磁 槽 148中的每一个的第一端部 1481与转子铁心 14的外周缘之间的最 小距离为电机单边气隙的 0.3倍至 1.5倍,第三隔磁槽 148中的每一个 的第二端部 1482与第二永磁体 124的边缘之间的最小距离为电机单边 气隙的 0.3倍至 1.5倍。 进一步有利地, 位于每个第二永磁体 124附近 的第三隔磁槽 148中的相邻的两个之间的相对角度为 5。 至 30。 , 该 相对角度更有利地为 10。 至 18。 。 如在图 1所示的实施例中, 第三隔 磁槽 148-1与第三隔磁槽 148-2之间有利地形成为 5。 至 30。 之间的相 对角度, 更有利地形成为 10。 至 18。 之间的相对角度。在以下几个实 施例中, 除非另作说明, 否则第三隔磁槽 148的形成方式与该实施例 相同。
在图 1和图 2示出的根据本发明的 体电机 1的实施例中, 在 每个永磁体组 12的第一永磁体 122和第二永磁体 124之间设置有第四 隔磁槽 142,即在第一永磁体 122的两侧分别设置有位于其与第二永磁 体 124之间第四隔磁槽 142。第四隔磁槽 142可以为圆形、方形以及其 他形状, 在该实施例中, 其为基本的三角形, 三角形的尖角中的一个 朝向转子铁心 14的外周缘,并且在三角形的第四隔磁槽 142的底部形 成有凸出部 142-1 ,位于第四隔磁槽 142内的凸出部 142-1用于抵靠第 一永磁体 122和第二永磁体 124的端部, 从而为第一永磁体 122和第 二 体 124提供支承和固定作用。 上述凸出部 142-1为位于其两侧 的 体提供支承, 使得 ^体在安装到定子铁心内后更加牢固和稳 定, 在永磁体电机 1的运转过程中不会发生位移或摆动。 另外, 在凸 出部 142-1的与第一永磁体 122和第二永磁体 124的角部接触的位置 形成空隙 142-2, 这不仅有利于保护永磁体的边缘部, 而且还便于第四 隔磁槽 142的成形。 每个第四隔磁槽 142的面积为第一永磁体 122的 面积的 0.05至 0.15倍。 第四隔磁槽 142可以进一步优化转子组件 10 的磁路的磁阻, 并优化磁力线的分布, 不会影响到励磁磁场的磁场强 度, 从而能够保证永磁体磁能的最大化利用, 由此确保电机效率的最 大化。
进一步有利地, 在相邻的两个第一隔磁槽 144之间的更靠近转子 铁心 14的中心的一侧形成有第五隔磁槽 149, 第五隔磁槽 149具有与 转子铁心 14的外周 目同弧度的两个侧边,或者也可以具有相互平行 的两个侧边。 比如, 当第一隔磁槽 144具有沿转子铁心 14的外周缘延 伸的弧形侧边时, 第五隔磁槽 149也具有相同弧度的弧形侧边, 当第 一隔磁槽 144具有相互平行的侧边时, 第五隔磁槽 149也具有相互平 行的侧边。第五隔磁槽 149沿转子铁心 14的径向方向的宽度可以与第 一隔磁槽 144相同, 也可以与其不同。 比如, 第五隔磁槽 149沿转子 铁心 14的径向方向的宽度为电机单边气隙的 1倍至 4倍。第五隔磁槽 149可以辅助第一隔磁槽 144使得第二隔磁槽 124的端部的磁场分布更 加优化,进一步减小电机转矩输出的脉动以及提高永磁体组 12的抗退 磁能力。 另外, 通过对于第一至第五隔磁槽的优化设计, 可以在不减 少磁场输出的前提下, 有效地约束磁场分布和磁滞磁场换向, 由此减 少了磁场变化, 从而减少电机输出转矩的脉动。
如图 3和图 4所示, 示出根据本发明的永磁体电机 1的另一个实 施例。 在该实施例中, 转子组件 10中的每极永磁体组 12形成为 "一" 字形, 其包括位于中间的第一永磁体 122和位于第一永磁体 122两侧 的第二永磁体 124, 其中, 位于永磁体组 12的中央的第一永磁体 122 采用矫顽力较低的磁体形成, 位于永磁体组 12 的两侧的第二永磁体 124采用矫顽力比第一永磁体 122相对更高的磁体形成。 在该实施例 中,形成有关于永磁体组 12的对称轴线对称的三对第三隔磁槽 148-1、 148-2和 148-3。 三对第三隔磁槽 148中的每一对相对于 "一" 字形永 磁体组 12的斜率按照从永磁体组 12的边缘向中心的顺序依次增大。 本实施例中的三对第三隔磁槽 148的长度和宽度与以上参照图 1和图 2 所述的实施例相同, 在此不做赞述。 另外, 每相邻的两个第三隔磁 槽 148之间的相对角度也与图 1和图 2中所示的实施例相同, 比如该 相对角度为 5。 至 30。 , 更有利地为 10。 至 18。 。 进一步地, 位于第 二永磁体 124的端部的第一隔磁槽 144形成为具有与第二永磁体 124 的邻近边缘相平行的第一边缘部 1441, 并且还形成有与该第一边缘部 1441相垂直的第二边缘部 1442,第一隔磁槽 144的邻近转子铁心的外 周缘的侧边形成为与转子铁心 14的外周缘具有相同弧度的弧形,或者 也可以形成为直线形。 在相邻的两个第一隔磁槽 144之间形成有连接 肋 140, 在该实施例中, 连接肋 140为基本矩形。 另夕卜, 在第一隔磁槽 144的第一边缘部 1441与第二永磁体 124的邻近的边缘之间形成有连 接肋 125,第二永磁体 124的端部抵靠在连接肋 125的壁上,从而能够 为 体组 12提供支承和固定作用。还在第二 ? ^体 124的角部与连 接肋 125之间形成有空隙 123,这不仅有利于保护第二永磁体 124的角 部, 而且也便于用于容置永磁体组 12的槽的加工。
才艮据本发明的该实施例的永磁体电机 1通过采用分段式永磁体组 12, 可以在保证永磁体组 12具有一定磁能的基础上, 提高永磁体组 12的抗退磁能力, 而且能够减少磁铁用量, 从而降低永磁体电机 1的 生产成本。 另外, 设置在转子铁心 14中的隔磁槽能够优化磁力线在转 子铁心中的分布, 削弱磁力线的集中程度, 进一步增强永磁体的抗退 磁能力。 "一"字形永磁体更加有利于电机的加工制造, 从而进一步降 低制造成本。
在图 5和图 6中示出根据本发明的永磁电机 1的第三实施例。 在 该实施例中, 永磁体组 12采用 "V" 形设置, 其包括位于 V形的底部 的两段第一永磁体 122和位于 V形的顶部的两段第二永磁体 124, 第 一^ 体 122采用矫顽力较低的磁体, 第二 体 124采用矫顽力比 第一永磁体 122更高的磁体。 在该实施例中, 设置有与根据图 1和图 2所示的实施例相同的第一隔磁槽 144、第二隔磁槽 146和第三隔磁槽 148, 并且在第一隔磁槽 144中形成有凸出部 144-1以及空隙 144-2, 在此不做赘述。 当然, 在本实施例中也可以设置有如在第一实施例中 所设置的第五隔磁槽 149。 进一步地, 在本实施例的两段第一永磁体 122的邻近的端部之间形成有第六隔磁槽 145,即在 V形的底部形成第 六隔磁槽 145,第六隔磁槽 145沿第一永磁体 122的长度方向延伸,并 且在 V形的最底部形成有连接肋 147, 也就是说, 连接肋 147将分别 位于两个第一永磁体 122的端部的两个第六隔磁槽 145分隔开。另外, 在每个第六隔磁槽 145的邻近第一永磁体 122的位置处形成有凸出部 145-1, 用于支承第一永磁体 122, 防止其在永磁电机 1的运转过程中 发生位移。在连接肋 147的沿永磁体电机 1的转子铁心 14的径向方向 远离转子中心的位置处形成有转子铆接孔 16, 用于铆接转子叠片, 在 连接肋 147的沿转子铁心 14的径向方向靠近转子中心的位置处形成有 隔磁孔 18。也就是说,转子铆接孔 16和隔磁孔 18沿转子铁心 14的径 向方向设置在连接肋 147的两侧, 转子铆接孔 16更靠近转子铁心 14 的外周缘, 隔磁孔 18更靠近转子铁心 14的中心。 根据本实施例的隔 磁孔 18 可以为圆形、 方形或其他形状, 其面积为每一段第一永磁体 122的面积的 0.05倍至 0.15倍。 根据该实施例的永磁体电机 1具有较 高的结构强度, 使其更加适合高速运转, 并且使得电机 1的交轴和直 轴电感比例增大, 由此提高了电机的凸极效应。
在根据本发明的实施例中, 用于安装电机转子轴的转子内孔 15采 用阶梯复合圆, 如图 1和图 3所示, 也就是说在圆形转子内孔 15的周 壁上形成有朝向转子铁心的径向向外方向延伸的多个凹部 151 , 在所 示实施例中, 凹部 151的数量为 6个, 当然, 本领域技术人员应该理 解, 可以设置其他数量的凹部 151。 另外, 在图 5所示的永磁体电机 1 的转子内孔 15也可以采用这种阶梯复合圆形的转子内孔 151。 阶梯复 合圆形的转子内孔 151可以使转子转轴与转子铁心 14实现形状配合, 而无需使转子转轴与转子铁心 14之间采用过盈配合进行组装,从而能 够避免当转子转轴和转子铁心 14 采用过盈配合进行组装时由于转子 铁心 14的变形而使永磁体破碎的风险。
根据本发明的一个实施例, 本文中公开的永磁体电机具有 9个定 子齿 22, 由此在定子组件 20中形成有 9个定子线圏容置槽 26; 另夕卜, 位于转子组件 10中的永磁体组 12设置有 6极, 也就是说设置有 6个 体组 12, 从而形成 6组磁 ¼†, 在此, 6个 体组 12中的每一 组均为分段式组合永磁体。 根据本发明的这种 9个定子线圏容置槽 26 和 6个 体组 12的组合设计称为 6极 9槽集中卷设计,其与现有技 术中的 4极分布卷和 4极集中卷设计相比, 具有电机转矩密度大、 转 矩输出脉动小、 效率高以及成本低的优势。 此外, 根据本发明的永磁 体电机 1 ,永磁体组 12中的每一组的端部的最外侧边缘在转子铁心 14 中所对应的圆心角定义为每极 体组 12 的极弧角度, 将永磁体组 12中的每一组相对于转子铁心 14的整个圆周来说所平均占用的圆心 角度定义为^ 体组 12的^目角度, 有利地, 每极 体组 12的极 弧角度为每极 体组 12的^目角度的 0.6倍至 0.95倍。比如在如图 1所示的实施例中, 每极永磁体组 12的第二永磁体 124的最外侧边缘 在转子铁心 14中所对应的圆心角即为每极 体组 12的极弧角度, 而每极永磁体组 12的 目角度为 360。 /6=60。 ,其中共设置有 6个永 磁体组 12, 也就是具有 6 体组 12, 每 体组 12的极弧角 度为每 ¾0¾体组 12的极相角度 60° 的 0.6倍至 0.95倍,因此每极永 磁体组 12的极弧角度为 36。 至 57。 。
在根据本发明的上述实施例中,每极永磁体组 12的几何中心到转 子组件 10的中心的距离为永磁体电机 1的定子组件 20的外径的 0.15 倍至 0.35倍。 永磁体组 12的这种设置方式能够在确保定子组件 20具 有一定的磁能的情况下, 使定子组件 20具有足够的强度。
在根据本发明的实施例中, 由于设置在永磁体的端部与转子铁心 的外周缘之间的隔磁槽能够优化磁场分布并有效地约束磁滞磁场的换 向, 从而减小磁场的变化, 并由此减小电机输出转矩的脉动。 根据本 发明的具有多段式永磁体的转子组件通过在易于发生退磁的位置处设 置具有高矫顽力的永磁体, 能够有效地克服现有技术中的永磁体电机 转子易于退磁的问题, 并通过在受到退磁影响较轻的位置处设置具有 较低矫顽力的永磁体, 能够大大地降低电机转子的材料成本。 另外还 通过隔磁槽改变磁路磁阻的分布, 减小了磁场中磁力线的密集程度, 从而进一步提高永磁体的抗退磁能力。
以下参照附图 7-9详细说明用于安装电机的转子轴的转子内孔 15 的结构。 转子内孔 15大致为圆形, 与其装配在一起的转子轴为圆形。 转子内孔 15包括与转子轴形成过盈配合的凸部 152和相对于凸部 152 朝向转子的转子铁心 14的内部凹入的凹部 151, 其中, 凸部 152具有 与转子轴形成过盈配合的圆弧表面。凹部 151可以沿转子内孔 15的周 向方向设置有一个或更多个。 有利地, 凹部 151和凸部 152交替地分 布, 并且沿转子内孔 15的周向方向设置有 2个或更多个凹部 151。 通 过沿转子内孔 15的周向方向设置凹部 151, 能够在转子轴与转子内孔 15的装配过程中,使由于转子轴与转子内孔 15的凸部 152之间的过盈 配合而引起的转子本体的变形传导至凹部 151, 而不会进一步向转子 本体的远离转子内孔 15 的部分传导。 当所装配的电机为 体电机 时, 如图 7所示, 可以避免磁体容置槽处的转子本体的变形, 也就避 免了在转子轴与转子内孔 15 的装配过程中由于磁体容置槽的变形而 对 体 12产生的破坏。 另外, 当所装配的电机为感应电机时, 如图 8所示, 可以避免沿转子铁心 14的外周分布的感应槽处的转子本体的 变形, 从而有利于增强转子叠片之间的接合, 降低由于转子轴的装配 而产生的废品率。 进一步地, 凹部 151在整个转子内孔 15的周向方向上所占据的部 分对应的圆心角的总和小于 280度。有利地,上述圆心角的总和为 180 度。当沿着转子内孔 15的周向方向设置多个凹部 151时,多个凹部 151 所对应的圆心角的总和应满足上述关系, 即该总和应当小于 280度, 也就是说, 凸部 152所对应的圆心角的总和应该大于 80度。 凸部 152 沿转子内孔 15 的周向方向的上述分布比例可以确保转子轴与转子内 孔 15之间具有足够的接合力,以便在电机的运转过程中保持转子轴与 转子铁心 14之间的 强度。 在如图 7和图 8所示的实施例中, 沿转 子内孔 15的周向方向设置有 6个相同的凹部 151, 每个凹部 151所对 应的圆心角为 α, 则 6个凹部 151所对应的圆心角的总和 6 α应该小 于 280度。 在图 7和图 8中, 6个凹部 151沿着转子内孔 15的周缘关 于转子的中心 Ο对称地分布。 可以设想, 任意数量的凹部 151可以沿 着转子内孔 15的周缘关于转子的中心 Ο对称地分布。 当然, 也可以 沿转子内孔 15 的周缘均勾或不均勾地分布有任意其他数量的凹部 151。
在图 7和图 8所示的实施例中, 形成转子内孔 15的凸部 152和凹 部 151均为圆弧形, 并且凸部 152的周缘所形成的圆与凹部 151的周 缘所形成的圆为同心圆。 圆弧形的凸部 152和凹部 151便于加工制造, 这样可以大大地降低电机转子的制造成本。 在如图 7所示的永磁体电 机转子中, 凹部 151的个数设置成与转子 10中的磁极数相等, 并且每 个凹部 151均与一极永磁体 12的中心位置对准。而凸部 152则与电机 转子铁心 14的位于两极永磁体 12之间的部分对准, 由此可以使得在 转子轴与转子内孔 15装配时在凸部 152处产生的变形至多向两极^ 体 12之间的部分传递, 而尽可能少地向磁体容置槽的方向传递, 从而 进一步避免对容置在磁体容置槽内的 体 12的破坏。从图 7中可以 看出,由弧形的凹部 151的周缘形成的圆的第二直径 D2大于由弧形的 凸部 152的周缘所形成的圆的第一直径 Dl。 如此设置的转子内孔 15 能够降低转子内孔 15的加工精度, 同时也可以降低与转子内孔 15配 合的转子轴的加工精度, 由此能够大大地降低电机的制造成本。 此夕卜, 与现有技术中的具有完整圆形的转子内孔的电机转子相比, 在转子轴 与转子内孔之间具有相同过盈力的情况下, 根据本发明的转子将能够 更容易地装配转子轴, 因此能够降低在装配过程中所产生的废品率。 在转子轴与转子内孔 15的装配过程中, 由于凹部 151的存在, 使 得在转子轴向转子内孔 15中装配时仅引起转子内孔 15附近处的变形, 而这种变形不会传递至转子的磁体容置槽的位置处, 因此也就避免了 现有技术中存在由于转子轴与转子内孔的装配而导致破坏永磁体 12 的情况的发生, 从而降低了由于装配而引起的较高的废品率。 另外, 由于转子孔 15内的凹部 151的存在,还使得转子轴更加容易地装配到 转子孔 15内。
如图 7和 8中所示, 虽然形成电机转子 10的转子内孔 15的凹部 151的部分和形成转子内孔 15的凸部 152的部分均示出为圆弧形, 但 是, 其也可以采用其他的形状。 比如凹部 151可以形成为大致的梯形、 大致的矩形、 V形或者其他类似形状。 只要能够满足转子轴的外径大 于转子内孔 15的凸部 152处的第一直径 Dl, 并且凹部 151处的第二 直径 D2大于凸部 152处的第一直外径 D1即可。
如在图 9所示的根据本发明的转子内孔 15的另一个实施例中, 转 子内孔 15的凹部 151形成为包括偏心圆弧,形成凹部 151的偏心圆弧 包括第一偏心圆弧 153和第二偏心圆弧 154,第一偏心圆弧 153和第二 偏心圆弧 154的交点即为凹部 151的顶点, 即凹部 151在第一偏心圆 弧 153和第二偏心圆弧 154的交点处距离转子内孔 15的中心 O距离 最远。 因此, 可以通过位于第一偏心圆弧 153与第二偏心圆弧 154的 交点处的材料更好地吸收装配转子轴时在转子内孔 15 的附近发生的 变形。 在此, 第一偏心圆弧 153和第二偏心圆弧 154具有相对于凸部 152的圆心 O产生偏移的圆心。 由图中可知, 第一偏心圆弧 153的圆 心 O l和第二偏心圆弧 154的圆心 02关于通过转子 10的中心 O和凹 部 151沿转子内孔 15的周向方向的中点的直线对称。关于第一偏心圆 弧 153的圆心 O l和第二偏心圆弧 154的圆心 02与转子 10的中心 O 的偏心距以及第一偏心圆弧 153和第二偏心圆弧 154的半径可以确定 为在相邻的两个凸部 152之间形成具有一定深度的凹部 151即可。 通 过凹部 151的相对于转子内孔 15的最外侧点所形成的外接圆的第二直 径 D2大于由转子内孔 15的凸部 152形成的圆的第一直径 D1。在如图 9所示的实施例中,关于转子内孔 15的中心 O对称地分布的第一偏心 圆弧 153与第二偏心圆弧 154的交点之间的距离即为第二直径 D2。转 子内孔 15的凸部 152由具有第一直径 D1的基圆形成, 在图中以虚线 示出基圆, 凸部 152与电机转子的转子轴形成过盈配合。 转子内孔 15 的这种设计同样能够起到吸收在与转子轴的装配过程所产生的变形的 作用,从而避免转子本体的变形进一步向转子的其他部位传导的问题。 由此可以降低对转子内孔和转子轴的加工精度的要求, 并且便于转子 轴向转子内孔中的过盈装配。 另外, 对于永磁体电机转子而言, 还能 够减轻转子本体的变形对容置在磁体容置槽内的永磁体的挤压, 从而 避免对 7 ^体的破坏。
在采用根据本发明的转子内孔的电机转子中, 通过将转子内孔设 置成凸部和凹部相结合的形式, 并且在与转子轴装配时使得转子内孔 的凸部与转子轴形成过盈配合。 这样, 可以使得在转子轴与转子内孔 的过盈配合过程中产生的变形被凹部吸收, 避免变形的进一步扩散, 从而有利于转子铁心的整体的稳固性。 另外, 形成为凸部和凹部相结 合的转子内孔更加有利于转子轴向转子内孔中的装配, 由此可以降低 转子轴和转子内孔的加工精度, 从而大大地降低电机的制造成本。 以上仅是对本发明的具体实施例的简要说明, 本领域技术人员可 以利用本发明所公开的技术方案所产生的启示对其他形式的电机转子 或电机作出各种改进或变型, 或者对本发明所述的电机转子或电机作 出相应的修改或改进, 这些改进或变型都将落入本发明的权利要求所 请求保护的范围之内。

Claims

权利要求书
1. 一种电机转子(10), 所述电机转子(10) 包括位于其中心处的 转子内孔(15), 所述转子内孔(15)用于接合转子轴,
其特征在于, 所述转子内孔(15) 的周缘包括凹部(151)和凸部 (152), 所述凸部(152)具有与所述转子轴形成过盈配合的表面。
2. 如权利要求 1所述的电机转子(10), 其中, 所述凹部(151) 与所述凸部(152)沿所述转子内孔(15)的周缘交替地分布。
3. 如权利要求 1所述的电机转子(10), 其中, 所述凹部(151) 沿所述转子内孔( 15)的周缘所占据的部分对应的圆心角的总和小于 280 度。
4. 如权利要求 3所述的电机转子(10), 其中, 所述凹部(151) 沿所述转子内孔(15)的周缘所占据的部分对应的圆心角的总和为 180 度。
5. 如权利要求 1所述的电机转子(10), 其中, 所述凹部(151) 沿所述转子内孔( 15) 的周缘关于所述转子( 10)的中心(O)对称地 分布。
6. 如权利要求 1所述的电机转子(10), 其中, 所述凸部(152) 的与所述转子轴形成过盈配合的表面为圆弧表面。
7. 如权利要求 6所述的电机转子( 10 ),其中,通过所述凹部( 151 ) 的相对于所述转子内孔( 15 )的最外侧点形成的外接圆的第二直径( D2 ) 大于由所述转子内孔(15) 的凸部(152)形成的圆的第一直径(Dl)。
8. 如权利要求 Ί所述的电机转子( 10 ),其中,通过所述凹部( 151 ) 的相对于所述转子内孔( 15)的最外侧点形成的所述外接圆与由所述转 子内孔( 15)的凸部( 152)形成的所述圆为同心圆。
9. 如权利要求 7所述的电机转子(10), 其中, 所述凹部(151) 的周缘包括偏心圆弧。
10. 如权利要求 9所述的电机转子(10), 其中, 所述偏心圆弧包 括第一偏心圆弧( 153)和第二偏心圆弧( 154)。
11. 如权利要求 10所述的电机转子(10), 其中, 所述第一偏心圆 弧( 153) 的圆心 (Ol)和所述第二偏心圆弧( 154) 的圆心(02) 关 于通过所述转子( 10)的中心(Ο)和所述凹部( 151)沿所述转子内孔
( 15)的周向方向的中点的直线对称。
12. 如权利要求 11所述的电机转子(10), 其中, 在所述转子内孔 ( 15) 的周缘上的点中, 所述第一偏心圆弧(153)与所述第二偏心圆 弧(154)的交点与所述转子内孔(15)的中心(Ο) 的距离最大。
13. 如权利要求 1所述的电机转子( 10), 其中, 所述凹部( 151 ) 的个数为 2个或更多个。
14. 如权利要求 1所述的电机转子( 10), 其中, 所述凹部( 151 ) 形成为梯形、 矩形或 V形。
15. 如权利要求 1-14中的任一项所述的电机转子(10), 其中, 所 述电机转子(10)为永磁体电机转子。
16. 如权利要求 15所述的电机转子( 10), 其中, 所述凹部( 151 ) 的数量与所述^体电机转子的磁极数相等。
17. 如权利要求 16所述的电机转子( 10 ), 其中, 所述凹部( 151 ) 沿所述电机转子( 10)的径向方向与每极永磁体 ( 12)的中心对准。
18. 如权利要求 1-14中的任一项所述的电机转子(10), 其中, 所 述电机转子(10)为感应电机转子。
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Publication number Priority date Publication date Assignee Title
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CN104578650A (zh) * 2013-10-15 2015-04-29 台达电子企业管理(上海)有限公司 电机
JP2015122936A (ja) 2013-10-31 2015-07-02 三星電子株式会社Samsung Electronics Co.,Ltd. 埋込磁石型モータ及び埋込磁石型モータの使用方法
CN103715793A (zh) * 2013-11-30 2014-04-09 浙江京马电机有限公司 轴与转子铁芯配合结构
JP6469964B2 (ja) * 2014-04-23 2019-02-13 株式会社日立製作所 永久磁石式回転電機
CN105429410B (zh) * 2014-09-19 2019-06-04 珠海格力电器股份有限公司 永磁同步电机
JP2016073023A (ja) * 2014-09-26 2016-05-09 東芝三菱電機産業システム株式会社 永久磁石式回転子および永久磁石式同期回転電機
CN104600947B (zh) * 2014-11-25 2016-03-02 珠海格力节能环保制冷技术研究中心有限公司 电机
CN104767337B (zh) * 2015-04-24 2017-08-25 永济新时速电机电器有限责任公司 动车永磁同步牵引电动机
CN104767305A (zh) * 2015-04-24 2015-07-08 永济新时速电机电器有限责任公司 一种新型永磁电机的转子
CN105141058B (zh) * 2015-09-07 2018-03-30 中车株洲电力机车研究所有限公司 永磁同步电机转子和永磁同步电机
CN106549528A (zh) * 2015-09-18 2017-03-29 丹佛斯(天津)有限公司 永磁电机和转子端盖
CN105846627A (zh) * 2016-03-24 2016-08-10 东南大学 一种提高永磁电机功率和转矩密度的转子结构
CN105958689B (zh) * 2016-06-08 2018-08-07 珠海格力节能环保制冷技术研究中心有限公司 铁心结构、转子组件及永磁电机
CN106026597B (zh) * 2016-07-11 2018-08-21 江苏大学 内置磁障式磁场增强型永磁无刷电机
CN106451988A (zh) * 2016-12-16 2017-02-22 日本电产凯宇汽车电器(江苏)有限公司 一种汽车刹车系统无刷电机转子冲片
CN106953442A (zh) * 2017-03-27 2017-07-14 广东美芝精密制造有限公司 永磁同步电机的转子、电机及其压缩机
CN107276353B (zh) * 2017-08-09 2023-12-15 珠海格力节能环保制冷技术研究中心有限公司 切向电机、切向电机转子及其转子铁芯
CN107394924A (zh) * 2017-08-30 2017-11-24 广东威灵电机制造有限公司 转子铁芯和转子
KR102509696B1 (ko) 2017-12-20 2023-03-15 삼성전자주식회사 Ipm bldc 전동기
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WO2021217671A1 (zh) * 2020-04-30 2021-11-04 华为技术有限公司 转子、永磁电机、电机驱动系统以及汽车
EP3916962A1 (en) * 2020-05-27 2021-12-01 Volvo Car Corporation Permanent magnet motor with field weakening arrangement
CN112994290B (zh) * 2021-02-07 2022-03-11 珠海格力节能环保制冷技术研究中心有限公司 一种转子结构和永磁同步电机
CN113972766B (zh) * 2021-09-06 2023-03-31 东风汽车集团股份有限公司 一种具有高抗振性能的电机转子冲片及转子总成结构
CN117353484A (zh) * 2022-06-29 2024-01-05 比亚迪股份有限公司 转子、电机和车辆

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007127658A2 (en) * 2006-04-25 2007-11-08 A.O. Smith Corporation Rotor having lobed bore and method of assembling same
CN101350536A (zh) * 2007-07-20 2009-01-21 乐金电子(天津)电器有限公司 电机转子铁芯叠片的结构
CN201726213U (zh) * 2010-07-19 2011-01-26 余姚市兰山电机企业有限公司 小功率电机转子冲片内孔非圆形结构
CN203219023U (zh) * 2012-12-10 2013-09-25 艾默生环境优化技术(苏州)有限公司 电机转子

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102738930B (zh) * 2007-11-28 2014-10-01 阿斯莫有限公司 埋入磁铁型电动机
WO2011001533A1 (ja) * 2009-07-03 2011-01-06 三菱電機株式会社 永久磁石型回転電機
WO2012008012A1 (ja) * 2010-07-12 2012-01-19 三菱電機株式会社 永久磁石型回転電機
JP5472200B2 (ja) * 2011-05-19 2014-04-16 株式会社デンソー 回転電機のロータ
CN202424338U (zh) * 2011-12-16 2012-09-05 铜陵浩岩节能科技有限公司 一种永磁同步电机的转子

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007127658A2 (en) * 2006-04-25 2007-11-08 A.O. Smith Corporation Rotor having lobed bore and method of assembling same
CN101350536A (zh) * 2007-07-20 2009-01-21 乐金电子(天津)电器有限公司 电机转子铁芯叠片的结构
CN201726213U (zh) * 2010-07-19 2011-01-26 余姚市兰山电机企业有限公司 小功率电机转子冲片内孔非圆形结构
CN203219023U (zh) * 2012-12-10 2013-09-25 艾默生环境优化技术(苏州)有限公司 电机转子

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018064374A (ja) * 2016-10-13 2018-04-19 三菱電機株式会社 回転電機の回転子及びそれを用いた回転電機
US11476527B2 (en) 2017-07-25 2022-10-18 Milwaukee Electric Tool Corporation High power battery-powered system
US11462794B2 (en) 2017-07-25 2022-10-04 Milwaukee Electric Tool Corporation High power battery-powered system
USD960086S1 (en) 2017-07-25 2022-08-09 Milwaukee Electric Tool Corporation Battery pack
US11387695B2 (en) * 2017-08-09 2022-07-12 Gree Green Refrigeration Technology Center Co., Ltd. Of Zhuhai Tangential motor, tangential motor rotor and rotor iron core thereof
US11387696B2 (en) * 2017-08-09 2022-07-12 Gree Green Refrigeration Technology Center Co., Ltd. Of Zhuhai Tangential motor, tangential motor rotor and rotor core of tangential motor rotor
EP3672027A4 (en) * 2017-12-21 2020-11-11 Gree Electric Appliances, Inc. of Zhuhai MOTOR ROTOR AND PERMANENT MAGNET MOTOR
CN110365146A (zh) * 2018-03-26 2019-10-22 株式会社安川电机 电动机转子、电动机及电动机转子的装配方法
US11780061B2 (en) 2019-02-18 2023-10-10 Milwaukee Electric Tool Corporation Impact tool
DE102019002449A1 (de) 2019-04-03 2020-07-09 Daimler Ag Rotorkern für einen Rotor einer elektrischen Maschine, Rotorelement mit einem solchen Rotorkern sowie elektrische Maschine für ein Kraftfahrzeug
EP3944466A4 (en) * 2019-08-26 2022-05-18 Anhui Meizhi Precision Manufacturing Co., Ltd. ROTOR, MOTOR, COMPRESSOR AND REFRIGERATOR
EP3944466A1 (en) * 2019-08-26 2022-01-26 Anhui Meizhi Precision Manufacturing Co., Ltd. Rotor, motor, compressor, and refrigeration apparatus
EP3866304A1 (en) * 2020-02-12 2021-08-18 Toyota Jidosha Kabushiki Kaisha Rotor of rotary electric machine for vehicle
US11594925B2 (en) 2020-02-12 2023-02-28 Toyota Jidosha Kabushiki Kaisha Rotor of rotary electric machine for vehicle
CN114094740A (zh) * 2020-07-31 2022-02-25 安徽威灵汽车部件有限公司 转子冲片、转子、电机和车辆

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