WO2023233573A1 - 磁気ギア装置 - Google Patents

磁気ギア装置 Download PDF

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Publication number
WO2023233573A1
WO2023233573A1 PCT/JP2022/022284 JP2022022284W WO2023233573A1 WO 2023233573 A1 WO2023233573 A1 WO 2023233573A1 JP 2022022284 W JP2022022284 W JP 2022022284W WO 2023233573 A1 WO2023233573 A1 WO 2023233573A1
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WO
WIPO (PCT)
Prior art keywords
magnetic
rotor
magnetic gear
torque
poles
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/JP2022/022284
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English (en)
French (fr)
Japanese (ja)
Inventor
広大 岡崎
純士 北尾
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2024524065A priority Critical patent/JP7686150B2/ja
Priority to PCT/JP2022/022284 priority patent/WO2023233573A1/ja
Priority to CN202280096246.6A priority patent/CN119213674A/zh
Priority to DE112022007329.2T priority patent/DE112022007329T5/de
Publication of WO2023233573A1 publication Critical patent/WO2023233573A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
    • H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
    • H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
    • H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap

Definitions

  • This application relates to a magnetic gear device.
  • the magnetic gears constituting a conventional magnetic gear device include a cylindrical inner magnet tube with a plurality of magnets arranged in parallel on the outer periphery, a cylindrical outer magnet tube with a plurality of magnets arranged in parallel on the inner periphery, and A cylindrical magnetic tube in which a plurality of magnetic bodies are arranged in parallel at equal intervals in the circumferential direction is coaxially arranged with the magnetic tube interposed between the inner magnet tube and the outer magnet tube. Any two of the inner magnet cylinder, outer magnet cylinder, and magnetic cylinder are used as a rotor, and the remaining one is used as a stator to transmit rotational torque.
  • the magnetic body has a rod shape extending parallel to the axial direction of the magnetic tube, and the magnets of the inner magnet tube and the outer magnet tube are located between one end and the other end in the axial direction. They are arranged in a skewed manner with positional deviations in the same direction in the respective circumferential directions.
  • the present application discloses a technology for solving the above-mentioned problems, and provides a magnetic gear device that can reduce torque pulsation output from a combination of a magnetic gear and a rotating electric machine and suppress speed vibration on the output side.
  • the purpose is to provide.
  • a further object is to manufacture such a magnetic gear device easily and at low cost.
  • the magnetic gear device disclosed in the present application includes an inner magnet cylinder in which a plurality of first permanent magnets are arranged on the outer periphery to form a small-pole mechanism, and a plurality of second permanent magnets are arranged in the inner periphery to form a multi-pole mechanism.
  • N pole pieces made of a soft magnetic material are arranged at equal intervals in the circumferential direction, and N pole pieces made of a soft magnetic material are arranged between the inner magnet barrel and the outer magnet barrel with a magnetic gap between the inner magnet barrel and the outer magnet barrel, respectively.
  • one of the inner magnet barrel, the outer magnet barrel and the magnetic barrel is connected to a first rotor to an input part, and the other one is connected to an output part.
  • the rotary electric machine includes a second rotor, a magnetic gear using the remaining one as a stator, a rotor having M1 permanent magnets, and a stator having M2 teeth.
  • the input part of the magnetic gear is connected to the rotating shaft of the rotating electrical machine, and transmits the input rotational force to the output part. and a first condition that a first numerical value based on the least common multiple of the number N of the pole pieces and the number of poles of one of the first and second rotors matches the least common multiple M of M1 and M2; This satisfies at least one of the second condition of being equal to a number multiplied by a multiple of 3.
  • torque pulsation output from the combination of the magnetic gear and the rotating electric machine can be reduced, and speed vibration on the output side can be suppressed. Further, such a magnetic gear device can be manufactured easily and at low cost.
  • FIG. 1 is a longitudinal cross-sectional view showing the configuration of a magnetic gear device according to Embodiment 1.
  • FIG. 1 is a cross-sectional view showing the configuration of a rotating electric machine in a magnetic gear device according to Embodiment 1.
  • FIG. FIG. 2 is a cross-sectional view showing the configuration of a magnetic gear in the magnetic gear device according to the first embodiment.
  • FIG. 3 is a partial cross-sectional view showing the positional relationship of each part of the magnetic gear according to the first embodiment.
  • FIG. 3 is a waveform chart showing magnetic gear torque of the magnetic gear device according to the first embodiment.
  • FIG. 2 is a partial cross-sectional view showing the positional relationship of each part of the rotating electric machine according to the first embodiment.
  • FIG. 2 is a waveform diagram showing the rotating electrical machine torque when no current is applied in the magnetic gear device according to the first embodiment.
  • FIG. 2 is a waveform diagram showing rotating electrical machine torque, magnetic gear torque, and composite torque when no current is applied in the magnetic gear device according to the first embodiment.
  • 5 is a waveform diagram showing a change in torque pulsation of a composite torque according to a phase shift of a rotor of a rotating electric machine in the magnetic gear device according to the first embodiment.
  • FIG. FIG. 3 is a diagram showing the amplitude of a frequency analysis result of magnetic gear torque in the magnetic gear device according to the first embodiment. In the magnetic gear device according to the first embodiment, it is a diagram showing the amplitude of the frequency analysis result of the rotating electric machine torque.
  • FIG. 1 is a waveform diagram showing the rotating electrical machine torque when no current is applied in the magnetic gear device according to the first embodiment.
  • FIG. 2 is a waveform diagram showing rotating electrical machine torque, magnetic gear torque, and composite torque when no current
  • FIG. 3 is a waveform diagram showing a generalized sixth-order component of torque in the magnetic gear device according to the first embodiment.
  • FIG. 2 is a waveform diagram showing a generalized twelfth order component of torque in the magnetic gear device according to the first embodiment.
  • FIG. 2 is a waveform diagram generally showing torque pulsations of the sixth-order component and the twelfth-order component of the composite torque in the magnetic gear device according to the first embodiment.
  • FIG. 3 is a longitudinal cross-sectional view showing the configuration of a magnetic gear device according to another example of the first embodiment.
  • FIG. 7 is a waveform diagram showing rotating electrical machine torque, magnetic gear torque, and composite torque when current is applied in the magnetic gear device according to the second embodiment.
  • FIG. 7 is a longitudinal cross-sectional view showing the configuration of a magnetic gear device according to a third embodiment.
  • FIG. 7 is a longitudinal cross-sectional view showing the configuration of a magnetic gear device according to a fourth embodiment.
  • FIG. 7 is a longitudinal cross-sectional view showing the configuration of a magnetic gear device according to a fourth embodiment.
  • FIG. 1 is a longitudinal cross-sectional view showing the configuration of a magnetic gear device according to the first embodiment.
  • the magnetic gear device 100 is composed of a drive unit including a rotating electrical machine 10 and a magnetic gear 20.
  • FIG. 2 is a cross-sectional view showing the configuration of the rotating electrical machine 10 in the magnetic gear device 100, taken along the line AA in FIG.
  • FIG. 3 is a cross-sectional view showing the configuration of the magnetic gear 20 in the magnetic gear device 100, taken along the line BB in FIG.
  • a shaft serving as a rotating shaft 11 of a rotating electric machine 10 is connected to an input section 21 of a magnetic gear 20, and the magnetic gear 20 transmits the rotational force input to the input section 21 to an output section 22.
  • the input section 21 of the magnetic gear 20 is integrally configured with the rotating shaft 11 of the rotating electric machine 10.
  • the rotating electrical machine 10 includes a rotor 12 and a stator 15 provided around the outer periphery of the rotor 12 via a magnetic gap.
  • the rotor 12 includes a plurality (M1) of permanent magnets 13 serving as magnetic poles, eight in this case, arranged in parallel in the circumferential direction on the outer peripheral surface of the rotor core 14 .
  • the permanent magnets 13 are radially magnetized and arranged so that the polarities of adjacent permanent magnets 13 are reversed.
  • the stator 15 has a plurality (M2) of teeth 16, 12 in this case, that protrude toward the magnetic gap, and a coil 17 is wound around each tooth 16.
  • the rotating electric machine 10 is an example of an 8-pole, 12-slot concentrated winding structure having 8 permanent magnets 13 and 12 teeth 16. Note that in FIG. 2, illustration of the coil 17 is omitted for convenience.
  • the magnetic gear 20 includes an inner magnet tube 23 that constitutes a small-pole mechanism with a small number of magnetic poles, an outer magnet tube 26 that constitutes a multi-pole mechanism that has a large number of magnetic poles, and a magnetic gear 20 that is arranged between the inner magnet tube 23 and the outer magnet tube 26.
  • a magnetic cylinder 30 is provided, which is disposed through a magnetic gap 31 from each side.
  • the inner magnet cylinder 23 includes a plurality of first permanent magnets 25, in this case eight, which serve as magnetic poles and are arranged in parallel in the circumferential direction on the outer peripheral surface of a cylindrical support body 24.
  • the first permanent magnets 25 are radially magnetized and arranged so that the polarities of adjacent first permanent magnets 25 are reversed.
  • the outer magnet tube 26 includes a plurality of second permanent magnets 28, in this case 40 pieces, which serve as magnetic poles and are arranged in parallel in the circumferential direction on the inner peripheral surface of a cylindrical support body 27.
  • the second permanent magnets 28 are radially magnetized and arranged so that the polarities of adjacent second permanent magnets 28 are reversed.
  • the magnetic tube 30 disposed between the inner magnet tube 23 and the outer magnet tube 26 is composed of N (24 in this case) pole pieces 29 made of soft magnetic material arranged at equal intervals in the circumferential direction. be done.
  • the parts that generate driving force and gear action are made of magnetic material. This portion is protected by a frame (rotating electric machine frame 18, magnetic gear frame 32) and a bracket (rotating electric machine bracket 19, magnetic gear bracket 33) made of structural members such as iron or non-magnetic material.
  • the magnetic gear 20 has an inner magnet tube 23, an outer magnet tube 26, and a magnetic tube 30 arranged concentrically, and one of these three is connected to the first rotor connected to the input section 21, and the other one is connected to the first rotor connected to the input section 21.
  • the second rotor connected to the output section 22 and the remaining one are used as a stator.
  • the inner magnet tube 23 is used as a first rotor
  • the outer magnet tube 26 is used as a second rotor
  • the magnetic tube 30 is used as a stator.
  • the rotor 12 of the rotating electric machine 10 and the first rotor (inner magnet cylinder 23 ) and second rotor (outer magnet cylinder 26 ) of the magnetic gear 20 are supported by a plurality of bearings 35 .
  • the rotor 12 of the rotating electric machine 10 and the first rotor (inner magnet tube 23) of the magnetic gear 20 are provided coaxially, and the first rotor (inner magnet tube 23) of the magnetic gear 20 is provided on the same axis. rotates together with the rotating shaft 11 of the rotating electric machine 10.
  • the first permanent magnet 25 of the first rotor (inner magnet tube 23) rotates so as to sequentially cross the pole piece 29 of the magnetic tube 30, which is a stator, and the second permanent magnet of the second rotor (outer magnet tube 26) 28 is given a magnetomotive force.
  • the second rotor (outer magnet tube 26) rotates in the opposite direction to the first rotor (inner magnet tube 23).
  • the magnetic gear device 100 is configured as described above, and the driving force generated by the rotating electric machine 10 is decelerated to increase torque or accelerated to decrease torque by the magnetic gear 20, and is outputted to an output section corresponding to the output shaft of the magnetic gear 20. Output from 22.
  • a configuration for decelerating and increasing torque is shown.
  • the number of first permanent magnets 25 in the first rotor (inner magnet tube 23) is 8
  • the number of second permanent magnets 28 in the second rotor (outer magnet tube 26) is 40
  • FIG. 4 is a partial cross-sectional view showing the positional relationship of each part of the magnetic gear 20.
  • FIG. 5 is a waveform diagram showing the magnetic gear torque of the magnetic gear device 100.
  • FIG. 6 is a partial cross-sectional view showing the positional relationship of each part of the rotating electrical machine 10.
  • the rotor core 14 and permanent magnet 13, and one tooth 16 of the stator 15 in the circumferential range (mechanical angle range of 45 degrees) of one permanent magnet 13 of the rotor 12 of the rotating electric machine 10 are shown. Extracted and illustrated.
  • the circumferential magnetic pole center position (center line 43) of the rotor 12 rotating in the direction of the arrow 42 coincides with the circumferential center position (center line 44) of the teeth 16 as a reference.
  • the phase shift of the directional magnetic pole center position (center line 43) from the circumferential center position (center line 44) of the teeth 16 is indicated by ⁇ .
  • FIG. 7 is a waveform diagram showing the rotating electrical machine torque when no current is applied.
  • the torque waveform without a phase shift is shown by a dotted line
  • the torque waveform with a phase shift ⁇ is shown by a solid line.
  • the torque waveform without phase shift has an initial angle of 0° when it includes a cross section where the circumferential magnetic pole center position of the rotor 12 and the circumferential center position of the teeth 16 coincide.
  • the torque waveform of the phase shift ⁇ has an initial angle of 0° when it includes a cross section in which the circumferential magnetic pole center position of the rotor 12 is shifted from the circumferential center position of the teeth 16 by the phase ⁇ .
  • the rotating electrical machine torque has torque pulsations whose main components are six vibrations, similar to the above-mentioned magnetic gear torque.
  • the principle for determining the number of vibrations (order) of the rotating electric machine 10 is also the same as that for the magnetic gear 20, except that the periodically arranged pole pieces 29 correspond to the teeth 16. That is, the number of torque pulsations when the rotor 12 rotates 360 degrees in mechanical angle is a multiple of the least common multiple M of the number of poles of the rotor 12, which is the number of permanent magnets 13, and the number of teeth 16.
  • the least common multiple M(8, 12) 24
  • the rotor 12 of the rotating electric machine 10 and the first rotor (inner magnet tube 23) of the magnetic gear 20 are connected, and the combined torque of the rotating electric machine torque and the magnetic gear torque becomes the total torque.
  • the least common multiple LCM of the number of first permanent magnets 25 of the first rotor (inner magnet cylinder 23) of the magnetic gear 20 and the number of pole pieces 29 is the number of poles of the rotor 12 of the rotating electric machine 10. and the number of teeth 16 match the least common multiple M.
  • the order components of the main torque pulsations per revolution) are both 24 and the same.
  • Torque pulsation varies depending on the relative relationship between the following two positional relationships.
  • One is the positional relationship between the pole piece 29 of the magnetic gear 20 and the teeth 16 of the rotating electric machine 10.
  • the other is the permanent magnet 13 of the rotor 12 of the rotating electrical machine 10 and the first permanent magnet of the first rotor (inner magnet cylinder 23) of the magnetic gear 20 to which the rotor 12 of the rotating electrical machine 10 and the shaft (rotating shaft 11) are connected. This is the positional relationship with the magnet 25.
  • FIG. 8 is a waveform diagram showing the rotating electric machine torque, magnetic gear torque, and composite torque in the magnetic gear device 100 when no current is applied.
  • the torque waveform of the rotating electrical machine 10 dashed line
  • the torque waveform of the magnetic gear 20 dashed line
  • the composite torque waveform solid line
  • the difference (PP) between the maximum value and the minimum value of the waveform which is the magnitude T ⁇ of torque pulsation of the composite torque waveform, is compared with the torque waveform of the rotating electric machine 10 and the torque waveform of the magnetic gear 20.
  • the torque pulsation has been significantly reduced.
  • FIG. 9 is a waveform diagram showing a change in torque pulsation of the composite torque according to the phase shift ⁇ of the rotor 12 of the rotating electric machine 10 in the magnetic gear device 100.
  • the shift phase ⁇ is changed.
  • the variation in the magnitude of torque pulsation (PP) according to the phase shift ⁇ is shown.
  • T ⁇ The magnitude of the torque pulsation, which is smaller between the magnitude of the torque pulsation of the rotating electric machine torque and the magnitude of the torque pulsation of the magnetic gear torque, is defined as T ⁇ .
  • T ⁇ is the magnitude of torque pulsation of the magnetic gear torque, and is approximately 5.0.
  • FIG. 10 is a diagram showing the amplitude of the frequency analysis result of the magnetic gear torque in the magnetic gear device 100.
  • FIG. 11 is a diagram showing the amplitude of the frequency analysis result of the rotating electric machine torque in the magnetic gear device 100.
  • the main components of each torque pulsation of the magnetic gear torque and rotating electric machine torque include components that are multiples of the least common multiple of the numbers of permanent magnets (25, 13) and magnetic bodies (teeth 16, pole piece 29).
  • the 1x and 2x components are dominant.
  • the magnitude relationship between the two components differs depending on the structure of the rotating electric machine 10 and the magnetic gear 20.
  • FIG. 12 is a generalized waveform diagram showing the sixth order component of torque in the magnetic gear device 100.
  • a generalized torque waveform in which only the sixth-order component is extracted and the amplitude is set to 1 is shown for 360 degrees of electrical angle.
  • the torque pulsation magnitude TA is 2.0.
  • FIG. 13 is a waveform diagram showing a generalized twelfth order component of torque in the magnetic gear device 100.
  • the magnitude TB of torque pulsation is 2.0.
  • the dotted line indicates the case where the maximum value of the torque waveform is the initial angle
  • the solid line indicates the torque waveform when there is a phase shift by the phase shift ⁇ .
  • FIG. 14 is a waveform diagram generalizing the torque pulsations of the sixth-order component and the twelfth-order component of the composite torque in the magnetic gear device 100.
  • FIG. 14 shows changes in torque pulsation according to the shift phase ⁇ for the sixth-order component composite torque and the twelfth-order component composite torque generated based on FIGS. 12 and 13.
  • the phase shift ⁇ is changed.
  • the variation in the magnitude of torque pulsation (PP) according to the phase shift ⁇ is shown.
  • the range of ⁇ (12.3° ⁇ 25.5°) shown in FIG. 9 is an example based on the configuration of the rotating electric machine 10 and the magnetic gear 20 of the magnetic gear device 100 according to this embodiment, and the range of ⁇ shown in FIG. Since it is within the ⁇ range (10° ⁇ 50°), it can be explained that a reduction effect appears due to synthesis.
  • the order of torque pulsation is set to the least common multiple M of the number of poles of the rotor 12 and the number of teeth 16 of the rotating electric machine 10, and components that vibrate M times and 2M times per 360° mechanical rotation of the rotor 12 are defined as the order of torque pulsation. Can be reduced. If we apply the above considerations for electrical angle to mechanical angle, the range of shift phase ⁇ (: mechanical angle) in which torque pulsation can be reduced is (360/M/6)° ⁇ ((360/M/ 6) ⁇ 5))°.
  • the least common multiple LCM of the number N of pole pieces 29 of the magnetic gear 20 and the number of poles of the first rotor is the number of poles of the rotor 12 of the rotating electric machine 10. and the number of teeth 16 match the least common multiple M.
  • the magnetic gear device 100 which is a combination of the magnetic gear 20 and the rotating electric machine 10, can reduce output torque pulsations and suppress speed vibrations on the output side.
  • the first and second permanent magnets 25 and 27 used in the magnetic gear 20 do not require any special processing, and the magnetic gear device 100 can be manufactured easily and at low cost.
  • the circumferential magnetic pole center of the first rotor coincides with the circumferential center position of the fixed pole piece 29
  • the circumferential magnetic pole center of the rotor 12 coincides with the circumferential center position of the teeth 16 .
  • the number of poles of the first rotor (inner magnet tube 23) of the magnetic gear 20 matches the number of poles of the rotor 12 of the rotating electric machine 10. This makes it possible to design the permanent magnet 13 of the rotor 12 of the rotating electrical machine 10 and the first permanent magnet 25 of the first rotor (inner magnet tube 23) of the magnetic gear 20 using products with the same specifications, which reduces manufacturing costs. can be reduced.
  • the required specifications of the rotating electric machine 10 are usually determined first from the viewpoint of output and efficiency, and the number of poles of the rotor 12 and the number of teeth 16 are determined accordingly.
  • the magnetic gear 20 is selected so that the torque pulsations of the magnetic gear torque and the torque pulsations of the rotating electric machine torque can be reduced by canceling each other out. That is, the main order of the torque pulsation generated by the magnetic gear 20 is equal to or higher than the order of the torque pulsation generated by the rotating electric machine 10.
  • the number of poles of the first rotor (inner magnet tube 23) connected to the output shaft of the rotating electrical machine 10 is preferably greater than or equal to the number of poles of the rotor 12 of the rotating electrical machine 10.
  • the order of torque pulsation of the magnetic gear 20 is dominated by the least common multiple LCM of the number N of pole pieces 29 and the number of poles of the first rotor (inner magnet cylinder 23).
  • the component of an order smaller than the order component of the torque pulsation generated by the rotating electrical machine 10 is increased. Therefore, there is a concern that the effect of reducing torque pulsation cannot be obtained as a whole.
  • an 8-pole first rotor (inner magnet cylinder 23) forming a small-pole mechanism
  • a 40-pole second rotor (outer magnet cylinder 26) forming a multi-pole mechanism
  • a magnetic cylinder 30 A magnetic gear device 100 is shown in which a magnetic gear 20 including 24 pole pieces 29 constituting a magnetic gear 20 is combined with a rotating electrical machine 10 having 8 poles and 12 slots.
  • X and Y are integers
  • the number of poles of the first rotor is 2X
  • the number of poles of the second rotor is 2Y
  • the number of pole pieces 29 is ( Let us consider the magnetic gear 20 which is set to X+Y.
  • the least common multiple M of the number of poles of the rotor 12 of the rotating electric machine 10 and the number of teeth 16 is the same as the number of poles of the first rotor (inner magnet cylinder 23) connected to the rotating shaft 11 of the rotating electric machine 10. It is clear that if they match the least common multiple LCM with the number of pieces 29, it becomes possible to perform an adjustment in which the torque pulsations of the magnetic gear torque and the torque pulsations of the rotating electric machine torque can be reduced by canceling each other out.
  • FIG. 15 is a longitudinal sectional view showing the configuration of a magnetic gear device 100 according to another example of the first embodiment.
  • the rotating shaft 11 of the rotating electric machine 10 is connected to the input section 21 of the magnetic gear 20 via a rotational force connection mechanism 36 such as a shaft coupling.
  • the connection mechanism 36 may be a belt, a mechanical gear, a magnetic coupling, or the like in addition to a shaft coupling. In this way, even when the rotating shaft 11 of the rotating electrical machine 10 is connected to the input section 21 of the magnetic gear 20 via the rotational force connection mechanism 36, the same effects as in the first embodiment can be obtained.
  • pole piece 29 is fixed, but the pole piece 29 may be configured to be free to rotate and adjust its phase arbitrarily, and the same effect can be obtained.
  • Embodiment 2 In the first embodiment described above, reduction of torque pulsation in the case where no current is applied in the magnetic gear device 100 has been described. In this second embodiment, reduction of torque pulsation when applying current to rotating electrical machine 10 in magnetic gear device 100 will be described.
  • the structure of the magnetic gear device 100 of this embodiment is similar to that shown in FIGS. 1 to 3 of the first embodiment.
  • FIG. 16 is a waveform diagram showing the rotating electric machine torque, magnetic gear torque, and composite torque when current is applied in the magnetic gear device according to the second embodiment.
  • the rotor 12 of the rotating electric machine 10 and the first rotor (inner magnet cylinder 23) of the magnetic gear 20 are connected, and the combined torque of the rotating electric machine torque and the magnetic gear torque is the total torque. It becomes torque.
  • the torque waveform of the rotating electrical machine 10 (broken line) when current is applied to the coil 17 of the rotating electrical machine 10
  • the torque waveform of the magnetic gear 20 (dotted line)
  • a composite torque waveform obtained by adding and combining both. solid line
  • the magnetic gear torque is similar to the torque waveform shown in FIG. 5 of the first embodiment, that is, six torque pulsations occur during the rotation of the first rotor (inner magnet cylinder 23) through 360 degrees of electrical angle. Occur.
  • the rotating electric machine torque is dominated by a sixth-order torque pulsation component that vibrates six times while the rotor 12 rotates through 360 degrees of electrical angle.
  • the component of torque pulsation that vibrates (6 ⁇ N1) times, where N1 is a natural number increases while rotating 360 degrees in electrical angle.
  • the difference (PP) between the maximum value and the minimum value of the waveform, which is the magnitude of torque pulsation T ⁇ of the composite torque waveform is compared with the torque waveform of the rotating electric machine 10 and the torque waveform of the magnetic gear 20.
  • the torque pulsation has been significantly reduced.
  • the phase relationship is adjusted.
  • the resultant torque has the effect of reducing torque pulsation. That is, the number of poles of the rotor 12 of the rotating electric machine 10 x (3 x N1) is the number of poles of the first rotor (inner magnet cylinder 23) connected to the rotating shaft 11 of the rotating electric machine 10 and the number of pole pieces 29. If the condition matching the least common multiple LCM is satisfied, the effect of reducing torque pulsation can be obtained when applying current to the rotating electrical machine 10.
  • the phase of the torque pulsation of the rotating electrical machine 10 when a current is applied varies depending on the amplitude and phase state of the current and the cross-sectional shape of the rotating electrical machine 10. Therefore, regarding the phase adjustment method, the arrangement is such that the torque pulsation is canceled out in the desired current amplitude and phase state for which vibration reduction is desired. For example, since a drive motor for an automobile is often operated in a low to medium torque range, the current amplitude and phase conditions in these torque ranges are set such that torque pulsation is canceled out.
  • the rotor 12 when the circumferential magnetic pole center of the first rotor (inner magnet cylinder 23) coincides with the circumferential center position of the pole piece 29, the rotor 12 This can be done by adjusting the phase (shift phase ⁇ ) between the circumferential magnetic pole center and the circumferential center position of the teeth 16.
  • the torque pulsations can be effectively reduced and speed vibrations caused by the torque pulsations can be suppressed.
  • the least common multiple LCM of the number N of pole pieces 29 of the magnetic gear 20 and the number of poles of the first rotor (inner magnet tube 23) shown in the first embodiment is the number of poles of the rotor 12 of the rotating electric machine 10 and the number of teeth.
  • the first condition is a condition that matches the least common multiple M of 16.
  • the least common multiple LCM of the number N of the pole pieces 29 of the magnetic gear 20 and the number of poles of the first rotor (inner magnet tube 23) shown in this embodiment is the number of poles of the rotor 12 of the rotating electrical machine 10 ⁇ the number of poles of the rotor 12 of the rotating electric machine 10
  • a condition matching (3 ⁇ N1) is defined as a second condition.
  • FIG. 17 is a longitudinal sectional view showing the configuration of a magnetic gear device according to the third embodiment.
  • the magnetic gear device 100A includes a drive unit including a rotating electric machine 10 and a magnetic gear 20A.
  • the rotating electric machine 10 is the same as that in the first embodiment described above.
  • the magnetic gear 20A includes an inner magnet tube 23 that constitutes a small-pole mechanism with a small number of magnetic poles, an outer magnet tube 26A that constitutes a multi-pole mechanism that has a large number of magnetic poles, and a magnetic gear 20A that is arranged between the inner magnet tube 23 and the outer magnet tube 26A.
  • a magnetic cylinder 30A is provided between the magnetic cylinders and the magnetic cylinders, respectively, with a magnetic gap 31 in between.
  • the cross section has the same configuration as in FIG. 3, but the number of first permanent magnets 25 in the inner magnet tube 23, the number of second permanent magnets 28 in the outer magnet tube 26A, and the pole piece in the magnetic tube 30A.
  • the combination of the number of 29 pieces is different.
  • the magnetic gear 20A has an inner magnet tube 23, an outer magnet tube 26A, and a magnetic tube 30A arranged concentrically, and one of these three is connected to the first rotor connected to the input section 21, and the other one is connected to the first rotor connected to the input section 21.
  • the second rotor connected to the output section 22 and the remaining one are used as a stator.
  • the inner magnet tube 23 is used as the first rotor
  • the magnetic tube 30A is used as the second rotor
  • the outer magnet tube 26A is used as the stator.
  • the other configurations are the same as in the first embodiment.
  • the rotor 12 of the rotating electrical machine 10 and the first rotor (inner magnet tube 23) of the magnetic gear 20A are coaxially provided, and the first rotor (inner magnet tube 23) of the magnetic gear 20A is provided on the same axis. rotates together with the rotating shaft 11 of the rotating electrical machine 10.
  • a magnetomotive force is applied to the pole piece 29 of the second rotor (magnetic tube 30A) disposed between the stator (outer magnet tube 26A) and the first rotor (inner magnet tube 23).
  • the second rotor (magnetic tube 30A) rotates in the same direction as the first rotor (inner magnet tube 23).
  • the magnetic gear device 100A uses the magnetic gear 20A to reduce the driving force generated by the rotating electrical machine 10 to increase or decrease torque, and output the driving force from the output section 22 corresponding to the output shaft of the magnetic gear 20A. do.
  • the magnetic gear torque is It vibrates the number of times that the least common multiple LCM of the number N of pieces 29 and the number of poles of the first rotor (inner magnet cylinder 23) is divided by X, that is, (LCM (2X, (X+Y))/X) times.
  • the magnetic gear 20A is configured by determining the combination of the number of first permanent magnets 25 in the outer magnet tube 26A, the number N of second permanent magnets 28 in the outer magnet tube 26A, and the number N of pole pieces 29 in the magnetic tube 30A. That is, the first value is ((number of poles of the stator (outer magnet tube 26A))/N) times the least common multiple LCM of the number N of pole pieces 29 and the number of poles of the first rotor (inner magnet tube 23), The first numerical value is set so as to satisfy the first condition of matching the least common multiple M of the number of poles of the rotor 12 of the rotating electrical machine 10 and the number of teeth 16.
  • the torque pulsations can be effectively reduced and speed vibrations caused by the torque pulsations can be suppressed.
  • the magnetic gear device 100A can reduce output torque pulsations and suppress speed vibrations on the output side. Further, as in the first embodiment, no special processing is required for the first and second permanent magnets 25 and 28 used in the magnetic gear 20A, and the magnetic gear device 100A can be manufactured easily and at low cost.
  • the configuration of the magnetic gear device 100A is determined by ((number of poles of the stator (outer magnet tube 26A))/N of the least common multiple LCM of the number N of pole pieces 29 and the number of poles of the first rotor (inner magnet tube 23). ) times the number of poles of the rotor 12 of the rotating electric machine 10 x (3 x N1), and in that case, in the second embodiment, As shown, the effect of reducing torque pulsation when applying current to the rotating electric machine 10 can be obtained. That is, if at least one of the first condition and the second condition is satisfied, the effect of reducing torque pulsation can be obtained by adjusting the phase relationship. Further, when both the first condition and the second condition are satisfied, the magnetic gear device 100A can obtain the effect of reducing torque pulsation both when no current is applied and when a current is applied. .
  • the magnetic cylinder 30A having the pole piece 29 rotates as a first rotor, and the gear ratio can be improved compared to the first embodiment. Further, since the outer magnet tube 26A at the outermost circumference of the magnetic gear 20A serves as a stator, the structure can be simplified and manufacturing costs can be reduced.
  • the magnetic gear 20A also meets the following conditions: the number of poles of the first rotor (inner magnet tube 23) connected to the output shaft of the rotating electrical machine 10 is greater than or equal to the number of poles of the rotor 12 of the rotating electrical machine 10; It is desirable that at least one of the conditions that the number of pole pieces 29 of the rotor (magnetic cylinder 30A) is greater than or equal to the number of teeth 16 of the rotating electric machine 10 is satisfied.
  • the magnetic gear 20A can be reliably selected so that the main order of the torque pulsation generated by the magnetic gear 20A is equal to or higher than the order of the torque pulsation generated by the rotating electrical machine 10, and the resultant torque output by the magnetic gear device 100A Torque pulsation can be suppressed.
  • stator outer magnet tube 26A
  • stator outer magnet tube 26A
  • FIG. 18 is a longitudinal cross-sectional view showing the configuration of a magnetic gear device according to Embodiment 4.
  • the magnetic gear device 100B is composed of a drive unit including a rotating electric machine 10A and a magnetic gear 20B.
  • the rotor 12A of the rotating electric machine 10A is integrated with the first rotor (inner magnet cylinder 23A) of the magnetic gear 20B.
  • the other configurations are the same as those of the third embodiment.
  • the rotor core material is shared by the magnetic gear 20B and the rotating electric machine 10A, and the number of structural members can be further reduced, so that manufacturing costs can be further reduced.
  • torque pulsation can be reduced by adjusting the phase relationship as in the third embodiment, and the output side speed vibration can be suppressed.
  • the first condition is that the least common multiple LCM of the number N of pole pieces 29 and the number of poles of the first rotor (inner magnet tube 23A) is multiplied by ((number of poles of stator (outer magnet tube 26A))/N).
  • the first numerical value is a condition that matches the least common multiple M of the number of poles of the rotor 12 of the rotating electrical machine 10 and the number of teeth 16. Further, the second condition is that the first numerical value matches the number of poles of the rotor 12 of the rotating electrical machine 10 ⁇ (3 ⁇ N1).
  • the fourth embodiment described above shows a configuration in which the rotating electric machine 10A and the magnetic gear 20B are housed in the same frame 18A, they may be housed in separate frames.
  • the magnetic gears 20, 20A, and 20B are examples of reduction gears for deceleration and torque increase, but the outer magnets of the magnetic gears 20, 20A, and 20B are multipolar mechanisms.
  • the tube 26 as the first rotor and connecting it to the rotating shaft 11 of the rotating electric machine 10, 10A, it is possible to realize a configuration of a speed increasing gear that increases speed and reduces torque. In that case as well, the same effects as in each of the above embodiments can be obtained.
  • FIG. 19 is a longitudinal sectional view showing the configuration of a magnetic gear device according to the fifth embodiment.
  • the magnetic gear device 100C includes a drive unit including a rotating electric machine 10 and a magnetic gear 20C.
  • the magnetic gear 20C includes an inner magnet tube 23B, an outer magnet tube 26A, and a magnetic tube 30B arranged concentrically, with the magnetic tube 30B serving as the first rotor, the inner magnet tube 23B, and the outer magnet tube 30B.
  • 26A is used as a second rotor, and the other is used as a stator.
  • a case is illustrated in which the inner magnet tube 23B is used as the second rotor and the outer magnet tube 26A is used as the stator.
  • the other configurations are the same as in the first embodiment.
  • the least common multiple of the number N of pole pieces 29 and the number of poles of the second rotor (inner magnet tube 23B or outer magnet tube 26A) ((number of poles of stator (outer magnet tube 26A or inner magnet tube 23B)) /N) times as the first value.
  • this first numerical value is set so as to satisfy the first condition of matching the least common multiple M of the number of poles of the rotor 12 of the rotating electric machine 10 and the number of teeth 16.
  • the circumferential magnetic pole center of the first rotor that is, the circumferential center position of the pole piece 29, 23B
  • the phase (shift phase ⁇ ) between the circumferential magnetic pole center of the rotor 12 and the circumferential center position of the teeth 16 is adjusted.
  • the first numerical value may be set to satisfy a second condition that corresponds to the number of poles of the rotor 12 of the rotating electric machine 10 x (3 x N1), in which case
  • a second condition that corresponds to the number of poles of the rotor 12 of the rotating electric machine 10 x (3 x N1), in which case
  • the effect of reducing torque pulsation when applying current to the rotating electric machine 10 can be obtained. That is, if at least one of the first condition and the second condition is satisfied, the effect of reducing torque pulsation can be obtained by adjusting the phase relationship.
  • the number of permanent magnets that constitute each magnetic pole of the rotating electric machine 10 and the magnetic gears 20, 20A, 20B, and 20C is not limited to one. Similar effects can be obtained when the permanent magnet is divided into the magnetization direction, magnetization orthogonal direction, axial direction, and other directions.
  • the rotating electric machine 10 and the magnetic gears 20, 20A, 20B, and 20C are of the radial type having a magnetic gap in a direction perpendicular to the rotational axis
  • the magnetic gears have a magnetic gap in a direction parallel to the rotational axis.
  • a similar effect can be obtained with an axial type.
  • the magnetic gear 20 has an example in which the small pole mechanism (inner magnet cylinder 23) has 8 poles, the multipolar mechanism (outer magnet cylinder 26) has 40 poles, and the number of pole pieces 29 is 24.
  • the shapes of the teeth 16, pole pieces 29, and permanent magnets 13, 25, and 28 of the rotating electric machine 10 and the magnetic gears 20, 20A, 20B, and 20C are shown in the simplest shapes.
  • the shape of the teeth 16 and the pole piece 29 may be such that they become wider in the radial direction toward the magnetic gap, or have a narrower hem.
  • bonded magnets may be used for the permanent magnets 13, 25, and 28, or two or more permanent magnets may be embedded in a V-shape per magnetic pole. In either case, the same effects can be obtained as long as the pole arrangement related to the magnetic gap has the same relationship as in each of the above embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)
PCT/JP2022/022284 2022-06-01 2022-06-01 磁気ギア装置 Ceased WO2023233573A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2024524065A JP7686150B2 (ja) 2022-06-01 2022-06-01 磁気ギア装置
PCT/JP2022/022284 WO2023233573A1 (ja) 2022-06-01 2022-06-01 磁気ギア装置
CN202280096246.6A CN119213674A (zh) 2022-06-01 2022-06-01 磁齿轮装置
DE112022007329.2T DE112022007329T5 (de) 2022-06-01 2022-06-01 Magnetgetriebe-Einrichtung

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118889772A (zh) * 2024-07-19 2024-11-01 湖南大学 一种轴向串联磁齿轮复合电机及其齿槽转矩抑制方法
WO2026020236A1 (en) * 2024-07-22 2026-01-29 Ecole De Technologie Superieure Integrated motor and transmission system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012111440A1 (ja) * 2011-02-17 2012-08-23 日立金属株式会社 モータ装置
JP2017166467A (ja) * 2016-03-18 2017-09-21 株式会社荏原製作所 流体機械及び変速装置
JP2018127998A (ja) * 2017-02-10 2018-08-16 株式会社荏原製作所 ポンプ装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10050510B2 (en) 2013-10-09 2018-08-14 Hitachi Metals, Ltd. Magnetic gear device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012111440A1 (ja) * 2011-02-17 2012-08-23 日立金属株式会社 モータ装置
JP2017166467A (ja) * 2016-03-18 2017-09-21 株式会社荏原製作所 流体機械及び変速装置
JP2018127998A (ja) * 2017-02-10 2018-08-16 株式会社荏原製作所 ポンプ装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118889772A (zh) * 2024-07-19 2024-11-01 湖南大学 一种轴向串联磁齿轮复合电机及其齿槽转矩抑制方法
WO2026020236A1 (en) * 2024-07-22 2026-01-29 Ecole De Technologie Superieure Integrated motor and transmission system

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DE112022007329T5 (de) 2025-03-13
CN119213674A (zh) 2024-12-27
JPWO2023233573A1 (https=) 2023-12-07

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