WO2000055961A1 - Moteur a reluctance - Google Patents

Moteur a reluctance Download PDF

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Publication number
WO2000055961A1
WO2000055961A1 PCT/JP2000/001641 JP0001641W WO0055961A1 WO 2000055961 A1 WO2000055961 A1 WO 2000055961A1 JP 0001641 W JP0001641 W JP 0001641W WO 0055961 A1 WO0055961 A1 WO 0055961A1
Authority
WO
WIPO (PCT)
Prior art keywords
reluctance motor
permanent magnets
permanent magnet
motor according
salient poles
Prior art date
Application number
PCT/JP2000/001641
Other languages
English (en)
Japanese (ja)
Inventor
Yasuo Yamaguchi
Masahiro Hasebe
Original Assignee
Aisin Aw Co., Ltd.
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 Aisin Aw Co., Ltd. filed Critical Aisin Aw Co., Ltd.
Publication of WO2000055961A1 publication Critical patent/WO2000055961A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/246—Variable reluctance rotors

Definitions

  • the present invention relates to a reluctance motor.
  • a reluctance motor includes a rotatably disposed rotor, and a stator disposed around the rotor, and forms a rotating magnetic field by flowing a phase current through a stator coil of the stator.
  • the rotor is rotated at a synchronous speed.
  • the same number of salient poles as the number of motor poles are formed on the rotor so as to protrude radially outward and at equal intervals in the circumferential direction. Further, a plurality of stator poles are formed on the stator so as to protrude inward in the radial direction, slots are formed between the stator poles, and the stator coils are accommodated in the slots. Is accepted.
  • the number of pole pairs of the reluctance motor is P, the Indakutansu of q axis extending the mainly radially outward from the center of each salient pole rotor and q-axis Indakutansu L q, the q-axis direction of the phase current
  • the component is defined as a q-axis current ia
  • the inductance of d span extending in a direction different from the q-axis by 90 ° electrical angle
  • d span inductance L d the component of the phase current in the d-axis direction
  • d-axis current When i d, the torque T which is generated by the reluctance motor
  • T can be increased.
  • An object of the present invention is to solve the problems of the conventional reluctance motor and to provide a reluctance motor capable of sufficiently increasing torque and output. Disclosure of the invention Therefore, in the reluctance motor of the present invention, a rotor having a rotor yoke, and a plurality of salient poles are formed to protrude from the _ rotor yoke, protrudes toward stearyl Ichita yoke, from the stearyl one Tayoku the rotor And a plurality of stator poles formed in this manner, and a stator having a stator coil.
  • a plate-shaped permanent magnet is disposed on both end surfaces of each of the salient poles, with one side positioned near the periphery of the salient pole on the stator side, along the projecting direction of the salient poles, and The polarities are arranged in the same manner.
  • the magnetic flux of the magnet forms a short loop and saturates, and the area around the permanent magnet actually functions as an air gap. Therefore, the magnetic resistance to the flow of the d flux can be increased, and the d inductance can be reduced. As a result, the difference between the q-axis inductance and the d-axis inductance increases, so that the torque generated by the reluctance motor can be sufficiently increased.
  • phase current flowing through the stator coil when the same terminal voltage is applied can be increased, for example, a power supply with a limited maximum voltage value, such as a battery applied to an electric vehicle, is used.
  • the output of the reluctance motor can be increased.
  • the size of the permanent magnet can be reduced by an amount corresponding to the increase in the torque and the output, the cost of the reluctance motor can be reduced, and the centrifugal force applied to the permanent magnet can be reduced.
  • the permanent magnets are arranged along the protruding direction of the salient poles, not only the width of the holding portion holding the permanent magnets is reduced, but also the mass of the holding portion itself is reduced, and the bending applied to the holding portion is reduced. Moment can be reduced. Therefore, it is possible to prevent stress concentration from occurring in the hole for inserting the permanent magnet.
  • the permanent magnets are arranged along the protruding direction of the salient poles, the direction of the centrifugal force applied to the permanent magnets when the rotor is rotated is different from the direction in which the permanent magnets are extended. Therefore, the centrifugal force is separated into a component acting in the projecting direction and a component acting in the width direction of the salient pole, and the component acting in the projecting direction is reduced. As a result, It is possible to further prevent the occurrence of stress concentration in the hole. -In this way, it is possible to prevent stress concentration from occurring in the holes, so that it is possible to increase the mechanical permissible number of images of the reluctance motor.
  • the phase current can be increased accordingly, and the output of the reluctance motor can be increased. Further, since the occurrence of voltage saturation in the high-speed rotation region can be suppressed, the high-speed rotation region can be expanded.
  • the permanent magnet is formed in a plate shape, the surface area increases, and the contact area with the salient pole increases. As a result, the attractive force of the permanent magnet can be increased, and the frictional force generated between the salient pole and the permanent magnet can be increased. Therefore, the bending moment applied to the holding portion can be reduced.
  • a rotor provided with a rotor yoke, and a plurality of salient poles formed so as to protrude from the rotor, a stator yoke, and protruding from the stator yoke toward the rotor. It has a plurality of formed stator poles and a stator having a stator coil.
  • a plate-shaped permanent magnet is provided on both end surfaces of each of the salient poles, with one edge positioned near the circumference of the salient pole on the stator side, and along the end surface of the salient pole, and Are arranged in the same manner as each other.
  • the magnetic flux of the magnet forms a short loop and saturates, and the area around the permanent magnet actually functions as an air gap. Therefore, the magnetic resistance to the flow of the d flux can be increased, and the d-axis inductance can be reduced. As a result, the differential force between the q-axis inductance and the d-axis inductance increases, so that the torque generated by the reluctance motor can be sufficiently increased.
  • phase current flowing through the stator coil when the same terminal voltage is applied can be increased, for example, a power supply with a limited maximum voltage value, such as a battery applied to an electric vehicle, is used.
  • the output of the reluctance motor can be increased.
  • the permanent magnet is arranged along the end face of the salient pole, not only the width of the holding portion holding the permanent magnet is reduced, but also the mass of the holding portion itself is reduced, and the bending moment applied to the holding portion is reduced. Weight can be reduced. Therefore, it is possible to prevent the occurrence of stress concentration in the hole into which the permanent magnet is inserted.
  • the permanent magnet is disposed along the end face of the salient pole, the direction of the centrifugal force applied to the permanent magnet when the rotor is rotated is different from the direction in which the permanent magnet is extended. Therefore, the centrifugal force is separated into a component acting in the protruding direction and a component acting in the width direction of the salient pole, and the component acting in the protruding direction is reduced. As a result, it is possible to further prevent the occurrence of stress concentration in the hole.
  • the allowable mechanical rotation speed of the reluctance motor can be increased.
  • the number of magnetic poles can be reduced accordingly, the phase current can be increased accordingly, and the output of the reluctance motor can be increased.
  • the occurrence of voltage saturation in the high-speed rotation region can be suppressed, the high-speed image transfer region can be expanded.
  • the permanent magnet is formed in a plate shape, the surface area increases, and the contact area with the salient pole increases. As a result, the attractive force of the permanent magnet can be increased, and the frictional force generated between the salient pole and the permanent magnet can be increased. Therefore, the bending moment applied to the holding portion can be reduced.
  • a protrusion is formed on a periphery of the salient pole so as to protrude in a circumferential direction of the rotor.
  • the direction in which the d flux flows and the direction in which the magnet flux flows are reversed, cancel each other out, and actively reduce the flow of the d-axis flux in the protrusion, so that the flow flows across the salient pole.
  • the d-axis magnetic flux decreases accordingly.
  • the protruding portion is a bridge connecting the circumferences of the salient poles.
  • the bridge becomes a magnetic path through which the d-axis magnetic flux and the magnet magnetic flux flow simultaneously. Therefore, the direction in which the d-axis magnetic flux flows and the direction in which the magnet magnetic flux flows are reversed, cancel each other out, and positively reduce the flow of the d-axis magnetic flux in the prism. The d-axis magnetic flux that flows through is reduced accordingly.
  • the magnetic resistance to the flow of the q-axis magnetic flux in the salient poles decreases correspondingly, so that the q flux increases. Then, since the difference between the q-axis magnetic flux and the d-axis magnetic flux increases, the torque can be sufficiently increased.
  • the protrusion has a radial thickness set to be smaller than a width of the permanent magnet, and one ⁇ portion of the permanent magnet has the radial protrusion. Is located radially outward from the base end of the.
  • one side of the permanent magnet is located radially outward from the base end of the protrusion in the radial direction, so that d flux flux flowing inside the protrusion detours outside the one side.
  • the magnetic resistance to the flow of the q flux in the salient pole is reduced by that amount, so that the q-axis flux increases. Then, since the difference between the q-axis magnetic flux and the d ⁇ magnetic flux increases, the torque can be sufficiently increased.
  • the protrusion has a radial thickness set to be smaller than a width of the permanent magnet, and the other edge of the permanent magnet has a radial protrusion. Are located closer to the rotor yoke than the base end of the rotor.
  • the other ⁇ portion of the permanent magnet is located closer to the rotor yoke than the base end of the protrusion in the radial direction, so that the d flux flux flowing in the protrusion bypasses the inside of the other ⁇ portion. Control the flow. And the d-axis magnetic flux flowing across the salient poles is reduced accordingly.
  • a gap (gap force) is positioned between the permanent magnets of the salient poles, and one green portion is positioned near the periphery of the stator side. It is formed along the protruding direction and parallel to the permanent magnet. In this case, since a gap is formed near the periphery of the stator side between the permanent magnets, a plurality of stator poles are formed as the position of the rotor with respect to the stator fluctuates.
  • the d-axis magnetic flux does not flow between the stator poles without passing through the air gap, but always passes through the air gap.
  • the d flux can be sufficiently reduced, and the q-axis flux can be increased accordingly.
  • the fluctuation of the torque generated with the rotation of the rotor is reduced, and the average torque can be increased.
  • a permanent magnet is buried in the gap with the same polarity arrangement as the other permanent magnets.
  • the magnet magnetic flux forms a short loop and saturates even near the periphery of the stator between the permanent magnets, and the air around the permanent magnet is substantially air. Since it functions as a gap, even if a plurality of stator poles face one salient pole as the position of the rotor with respect to the stator fluctuates, d flux will pass through the permanent magnet. And there is no flow between the stator poles. As a result, the d-axis magnetic flux can be sufficiently reduced. Then, the fluctuation of the torque generated with the rotation of the rotor is reduced, and the average torque can be increased.
  • a magnetic path in which the d-axis magnetic flux and the magnetic flux simultaneously flow is formed in the salient pole. Then, the direction in which the d-axis magnetic flux flows and the direction in which the magnet magnetic flux flows are reversed, cancel each other out, and actively reduce the flow of the d-axis magnetic flux in the salient poles, so that it flows across the salient poles The d-axis magnetic flux decreases accordingly.
  • the reluctance of the flow of the q-axis magnetic flux in the salient poles decreases accordingly, and the q-axis magnetic flux increases. Then, since the difference between the q flux and the d flux increases, the torque can be sufficiently increased.
  • the salient pole further includes: A slit is formed to extend from one side of the permanent magnet to the peripheral surface on the stator side.
  • a slit is formed, which not only increases the magnetic resistance to the flow of the d-axis magnetic flux, but also causes a short loop formed by the magnetic magnetic flux on the stator side. , The inductance becomes smaller. Therefore, the difference between the q-axis inductance and the d-axis inductance increases, so that the torque can be sufficiently increased.
  • a slit is formed, so that the d flux is bypassed between one side of the permanent magnet and the circumferential surface of the salient pole on the stator side. An attempt to flow can be prevented. Therefore, since the flow of the d-axis magnetic flux can be almost completely eliminated, the difference between the d-axis magnetic flux and the q-flux increases, and the torque can be sufficiently increased.
  • the permanent magnet is disposed such that a portion of one of the permanent magnets is located on the peripheral surface on the stator side.
  • one of the permanent magnets is disposed on the circumferential surface of the salient pole on the side of the stay, so that the d-axis magnetic flux flows. Not only does the magnetic resistance increase, but the shot loop formed by the magnet flux expands on the stator side, reducing the d-axis inductance. As a result, the difference between the q-axis inductance and the d-axis inductance increases, so that the torque can be sufficiently increased.
  • the reluctance motor having the protrusion it is possible to suppress the d-axis magnetic flux from flowing between one side of the permanent magnet and the circumferential surface of the salient pole on the stator side. Therefore, since the flow of the d-axis magnetic flux can be almost completely eliminated, the difference between the d ⁇ magnetic flux and the q-axis magnetic flux increases, and the torque can be sufficiently increased.
  • the permanent magnet is further extended to an opening.
  • the d-axis magnetic flux flowing in the salient pole is prevented from flowing radially inward from the permanent magnet.
  • the difference between the d-axis magnetic flux and the q-axis magnetic flux increases, and the torque can be sufficiently increased.
  • a rotor having a rotor yoke, a plurality of salient poles formed to protrude from the rotor yoke, a stator, and a rotor protruding from the stator yoke toward the rotor.
  • a plate-shaped permanent magnet is disposed on both end surfaces of each of the salient poles with the same polarity arrangement, and a plate-shaped permanent magnet is provided between the permanent magnets on both end surfaces of the salient pole.
  • the permanent magnets and the polar arrangement on both end surfaces of the salient poles are arranged to be the same.
  • the magnet magnetic flux forms a short loop and saturates, and the periphery of the permanent magnet substantially functions as an air gap. Therefore, even if a plurality of stator poles face one salient pole as the position of the rotor with respect to the stator fluctuates, the d-axis magnetic flux passes between the stator poles without passing through the permanent magnet. It does not flow. As a result, the d-axis magnetic flux can be sufficiently reduced. Then, the fluctuation of the torque generated due to the surface rolling of the rotor is reduced, and the average torque can be increased.
  • a rotor having a rotor yoke, a plurality of salient poles formed to protrude from the rotor yoke, a stage, and a rotor extending from the stage yoke to the rotor.
  • a plurality of stator poles formed so as to protrude and a stator having a stator coil.
  • plate-like permanent magnets are arranged on both end surfaces of each of the salient poles in the same polarity arrangement with each other.
  • a slit is formed extending to the surface.
  • the slit car is formed, not only the magnetic resistance against the flow of the d flux increases, but also the d-axis inductance decreases because the short loop formed by the magnet flux spreads to the stator side. Therefore, the difference between the q-axis inductance and the d-axis inductance increases, so that the torque can be sufficiently increased.
  • FIG. 1 is a sectional view of a reluctance motor according to a first embodiment of the present invention
  • FIG. 2 is an enlarged view of a main part of a rotor according to the first embodiment of the present invention
  • FIG. FIG. 4 is a sectional view of a rotor according to the second embodiment of the present invention
  • FIG. 4 is an enlarged view of a main part of a rotor according to a second embodiment of the present invention
  • FIG. FIG. 6 is a sectional view of the rotor according to the fourth embodiment of the present invention
  • FIG. 7 is a sectional view of the rotor according to the fifth embodiment of the present invention.
  • FIG. 8 is a sectional view of the rotor according to the sixth embodiment of the present invention, FIG.
  • FIG. 9 is a sectional view of the rotor according to the seventh embodiment of the present invention
  • FIG. FIG. 11 is a cross-sectional view of a rotor according to an eighth embodiment of the present invention
  • FIG. 11 is a cross-sectional view of a reluctance motor according to a ninth embodiment of the present invention
  • FIG. 12 is a ninth embodiment of the present invention
  • FIG. 13 is a sectional view of a permanent magnet according to a ninth embodiment of the present invention
  • FIG. 14 is a rotor according to a tenth embodiment of the present invention.
  • FIG. 15 shows a first position of the rotor
  • FIG. 15 shows a second position of the rotor in the tenth embodiment of the present invention
  • FIG. 16 shows a tenth embodiment of the present invention.
  • FIG. 17 shows the flow of q-axis magnetic flux and d-axis magnetic flux in FIG. 17.
  • FIG. 17 shows the q-axis magnetic flux and d-flux magnetic flux in the eleventh embodiment of the present invention.
  • FIG. 18 is a flow chart, FIG. 18 is a cross-sectional view of a reluctance meter according to a 12th embodiment of the present invention, and
  • FIG. 19 is a cross-sectional view of a reluctance meter according to a 12th embodiment of the present invention.
  • FIG. 20 is a sectional view of a rotor according to a thirteenth embodiment of the present invention.
  • FIG. 21 is a sectional view of a main part of a rotor according to a thirteenth embodiment of the present invention.
  • FIG. 22 is a cross-sectional view of a main part of a rotor according to a 14th embodiment of the present invention.
  • FIG. 23 is a cross-sectional view of a main part of a rotor according to a 15th embodiment of the present invention.
  • Sectional view of a main part of a rotor according to a sixteenth embodiment of the present invention FIG.
  • FIG. 26 is a cross-sectional view of a main part of the rotor in the embodiment,
  • FIG. 26 is a cross-sectional view of a main part of the rotor in the eighteenth embodiment of the present invention, and FIG.
  • FIG. 27 is a nineteenth embodiment of the present invention.
  • FIG. 28 is a cross-sectional view of a rotor according to a 20th embodiment of the present invention
  • FIG. 29 is a cross-sectional view of a rotor according to a 21st embodiment of the present invention.
  • FIG. 30 is a cross-sectional view of a rotor according to a twenty-second embodiment of the present invention.
  • FIG. 31 is a cross-sectional view of a ⁇ -portor according to a twenty-third embodiment of the present invention.
  • FIG. 32 is a sectional view of a rotor according to a twenty-fourth embodiment of the present invention
  • FIG. 33 is a sectional view of a rotor according to a twenty-fifth embodiment of the present invention.
  • FIG. 1 is a sectional view of a reluctance motor according to a first embodiment of the present invention
  • FIG. 2 is an enlarged view of a main part of a mouthpiece according to the first embodiment of the present invention.
  • reference numeral 11 denotes a rotatably arranged rotor.
  • the rotor 11 is made of a soft magnetic material such as a mouthpiece 12 supported by a bearing (not shown) and a magnetic plate.
  • a plurality of salient poles 22 are formed so as to project with a predetermined width.
  • the salient poles 22 are formed at equal intervals in the circumferential direction of the rotor 11, twice as many as the number of pole pairs P of the reluctance motor, that is, 2 ⁇ P (in this embodiment, 4). Is done. Then, assuming 2 ⁇ P straight lines at equal intervals radially outward from the rotation center of the rotor 11, the straight line becomes the center line of the salient pole 22, and the salient pole 22 becomes 2 To divide. Further, the salient pole 22 has an arc-shaped outer peripheral surface S 1 as a peripheral surface on the side of the stator 14, and a pair of mutually parallel end surfaces extending along both green surfaces of the outer peripheral surface S 1. Equipped with S2.
  • Each end face S 2 has the same length, and each end face S 2 has a q-axis magnetic flux ⁇ in the salient pole 22.
  • the rotor 11 is formed so as to extend in parallel with a straight line extending radially outward from the rotation center of the rotor 11.
  • a large air gap 26 is formed between the yoke 21 and each of the stator poles 16.
  • the stator 14 is disposed around the rotor 11 and is fixed to a motor casing (not shown).
  • the stator core 20 is made of a ferromagnetic material, and the stator core 20 is provided.
  • the stator core 20 includes an annular stator yoke 15, and a rotor 11 side from the stator yoke 15, that is, radially inward.
  • a plurality of (24 in the present embodiment) stator poles 16 are formed so as to protrude and are formed at equal intervals, and a slot 17 is formed between each stator pole 16.
  • the slot 17 accommodates the stator coil 18.
  • the force for disposing the stator 14 around the rotor 11 and the rotor around the stay can also be disposed.
  • the torque ⁇ generated by the reluctance motor is represented by the force expressed by the above formula (1), and the salient poles 22 and the stator poles 16 are opposed to each other via a slight air gap. While the magnetic resistance to the flow of the q-axis magnetic flux M Q is small, a large air gap is formed between the rotor yoke 21 and each stator pole 16 in the portion between the salient poles 22. since the magnetic resistance against the flow of d-axis magnetic flux M D is large. Thus, larger q Jikui inductance L q is d-axis inductance L d.
  • a plate-like permanent magnet having a width w, a thickness d, and a length m is provided near the circumference of the end face S2 of the rotor 11 on the stator 14 side, that is, in the vicinity of the outer circumference. 2 4 force ⁇
  • Each of the salient poles 22 is arranged by embedding along the projecting direction of the salient poles 22 (coinciding the projecting direction of the salient poles 22 with the width direction of the permanent magnets 24).
  • a first holding portion P1 is formed between the outer peripheral surface S1 and a second holding portion p2 is formed between the permanent magnet 2 and the end surface S2. 2 are held by the holding portions p 1 and P 2.
  • Each of the permanent magnets 24 has an outer edge 24 a as one edge 5 located near the outer periphery ⁇ of the salient pole 22, and an arrangement of N poles and S poles, Are arranged with the same arrangement.
  • the protruding direction means a direction parallel to the straight line extending radially outward from the rotation center of the mouth 11.
  • the permanent magnets 24 are arranged along the projecting direction of each salient pole 22, but are deflected by a predetermined angle with respect to the projecting direction of each salient pole 22. It can also be arranged.
  • each of the permanent magnets 24 extends in the axial direction of the rotor 11 and is disposed along both end surfaces S2 in parallel with the both end surfaces S2.
  • a hole 25 having a shape corresponding to the permanent magnet 24 is formed to penetrate the salient pole 22, and each permanent magnet 24 is fitted into the hole 25. Then, assuming that the distance between the permanent magnet 24 and the outer peripheral surface S 1 is 51 and the distance between the permanent magnet 2 and the end surface S 2 is 2, ⁇ 1 ⁇ 6 2
  • the distance 1 is set to a value that does not damage the salient poles 22 due to the centrifugal force applied to the permanent magnets 24.
  • the distances 51 and 52 are both smaller than the thickness d, and the axial length of the salient pole 22 is equal to the length m of the permanent magnet 24.
  • the width w of the permanent magnet 24 is smaller than the length L of the salient pole 22 and is not more than half.
  • the outer green portion 24a as one side of the permanent magnet 24 and the inner green portion 24a as the other side of the permanent magnet 24 are formed.
  • a radius is formed at a portion corresponding to b.
  • the permanent magnets 24 are disposed in the salient poles 22 as described above, the magnetic flux of the permanent magnets 24, that is, the magnet magnetic flux M P forms a short loop and saturates, and the permanent magnets 24 Will substantially function as an air gap. Therefore, it is possible to increase the magnetic resistance to the flow of d Jiku ⁇ flux M D, d ⁇ inductance L ⁇ , can be reduced. As a result, since the difference L increases, the torque T can be sufficiently increased.
  • the size of the permanent magnet 24 can be reduced by the amount corresponding to the increase in the torque T and the output, the cost of the reluctance motor can be reduced, and the centrifugal force applied to the permanent magnet 24 can be reduced. Can be smaller.
  • the width of the first holding portion P1 (equal to the thickness d of the permanent magnets 24) is small. Not only that, the mass of the first holding part P1 itself is also reduced, and the bending moment applied to the first holding part p1 can be reduced. Therefore, it is possible to further prevent stress concentration in the hole 25.
  • the direction of the centrifugal force applied to the permanent magnets 24 when the rotor 11 is turned over and the permanent magnets 24 are extended.
  • the direction is different. Therefore, the centrifugal force is separated into a component acting in the protruding direction and a component acting in the width direction of the salient pole 22, and the component acting in the protruding direction is reduced. As a result, it is possible to further prevent stress concentration in the hole 25.
  • the allowable mechanical rotation speed of the reluctance motor can be increased. Further, since the number of magnetic poles can be reduced, it is possible to suppress the occurrence of voltage saturation in the high-speed rotation range and increase the output of the reluctance motor in the high-speed rotation range.
  • the permanent magnet 24 is formed in a plate shape, the surface area becomes large, — The contact area becomes larger. Therefore, the attractive force of the permanent magnet 24 can be increased, and the frictional force generated between the salient pole 22 and the permanent magnet 24 can be increased. As a result, the bending moment applied to the first holding portion P1 can be reduced.
  • FIG. 3 is a cross-sectional view of a rotor according to a second embodiment of the present invention
  • FIG. 4 is an enlarged view of a main part of an ⁇ -motor according to the second embodiment of the present invention.
  • the first holding portion ⁇ 3 is provided with a slit 31 as a notch portion, a force, and an outer green portion 24a as one of the permanent magnets 24 in the direction in which the salient poles 22 project.
  • a slit 31 as a notch portion, a force, and an outer green portion 24a as one of the permanent magnets 24 in the direction in which the salient poles 22 project.
  • the inside and outside of the hole 25 are communicated via the slit 31.
  • the slit 31 extends in the axial direction of the rotor 11 to form an air gap, and the width r of the slit 31 is smaller than the thickness d of the permanent magnet 24.
  • the slit 31 can be formed in a force formed over the entire salient pole 22 in the axial direction, or in a part in the axial direction. Further, in the present embodiment, the force that allows the inside and outside of the hole 25 to be communicated by the slit 31 is not necessarily required to be communicated, and the slit can be formed by the concave portion.
  • the permanent magnets 24 are disposed near the outer peripheral edges of the both end faces S 2 of the salient poles 22, so that the both end faces S
  • the force that reduces the d-axis magnetic flux M D between the two ⁇ As the position of the rotor 11 with respect to the stator 14 moves, a plurality of stay poles 1 6 (first —. Fig.) When a single force opposes the salient pole 2 2, the d-axis magnetic flux M D flows through each of the stator poles 16 without passing through the permanent magnet 24, so that the d flux M D cannot be reduced sufficiently.
  • FIG. 5 is a sectional view of a rotor according to a third embodiment of the present invention.
  • each salient pole 22 has a plate-like permanent magnet 24 force, near the outer peripheral green as the circumference on the side of the stator 14, along the projecting direction of each salient pole 22. It is provided by burial. Further, a predetermined position between the permanent magnets 24 in the salient poles 22, for example, in the vicinity of the outer periphery ⁇ at the center of the salient poles 22, a plate-shaped permanent magnet 24 force, It is provided by being buried along the protruding direction.
  • the magnetic flux M P forms a short loop and saturates, and the periphery of the permanent magnet 24 substantially functions as an air gap. Therefore, as the position of the rotor 11 with respect to the stator 14 changes, even if a plurality of stator poles 16 (FIG. 1) face one salient pole 22, the d-axis flux M D is, it does not flow to pass through between each of the stator poles 1 6 without using the permanent magnet 2 4. As a result, the d ⁇ flux M D can sufficiently low to Rukoto. Then, the fluctuation of the torque ⁇ generated with the rotation of the ⁇ -axis 11 is reduced, and the average torque can be increased.
  • FIG. 6 is a sectional view of a rotor according to a fourth embodiment of the present invention.
  • FIG. 7 is a sectional view of a rotor according to a fifth embodiment of the present invention.
  • the permanent magnet 24 extends to the base end (root) of the salient pole 22, that is, the rotor yoke 21, and the width w of the permanent magnet 24 and the length L of the salient pole 22 are Almost equal.
  • the first holding part p1 for holding the permanent magnet 24 is closed, but the first holding part P1 is shown in FIG. 3 and FIG.
  • a slit 31 can also be formed.
  • the permanent magnet 24 can be disposed in the vicinity.
  • the width w of the permanent magnet 24 and the length L of the salient pole 22 are substantially equal, and the width w of the permanent magnet 24 Can be made shorter than the length L of the salient poles 22.
  • FIG. 8 is a sectional view of a rotor according to a sixth embodiment of the present invention.
  • a predetermined angle is protruded in the circumferential direction of the rotor 11 and toward the adjacent salient pole 22.
  • a projection 35 is formed.
  • the protrusion 35 serves as a magnetic path through which the magnet flux MP and the d-axis flux MD simultaneously flow. Then, the direction in which the d flux flux M D flows and the magnet flux M The direction of flow of P is reversed, and they cancel each other out, so that the flow of the d-axis-magnetic flux M D in the protrusion 35 is positively reduced, so that the d ⁇ magnetic flux flowing across the salient pole 22 M D is reduced accordingly.
  • the magnetic resistance is so correspondingly decreases, becomes large q-axis magnetic flux M Q to the flow of q-axis magnetic flux M Q salient poles 2 2.
  • the torque T can be sufficiently increased.
  • the distance between the permanent magnet 24 and the outer peripheral surface S1 as the peripheral surface on the stator 14 side is made smaller than the radial thickness 3 of the protrusion 35.
  • FIG. 9 is a sectional view of a rotor according to a seventh embodiment of the present invention.
  • a slit 31 as a notch is formed in the first holding portion P3. Therefore, the magnetic resistance against the flow of the d flux M D increases, and the short loop formed by the magnet flux MP spreads to the side of the stator 14 (FIG. 1), so that the d-axis inductance L d is reduced. Become smaller. As a result, since the difference ⁇ L increases, the torque T can be sufficiently increased.
  • FIG. 10 is a sectional view of a rotor according to an eighth embodiment of the present invention.
  • the thickness of the protrusion 35 in the radial direction gradually decreases as the distance from the base end b on the side of the salient pole 22 increases.
  • FIG. 11 is a sectional view of a reluctance motor according to a ninth embodiment of the present invention
  • FIG. 12 is a sectional view of a main part of a reluctance motor according to a ninth embodiment of the present invention
  • FIG. FIG. 21 is a diagram showing a state of disposing permanent magnets in a ninth embodiment of the present invention.
  • M D is the stator 1 4 d ⁇ flux which is generated by ( Figure 1)
  • P is the magnetic flux which is generated by the permanent magnet 2 4.
  • the outer circumference of the adjacent salient poles 22 on the stator 14 side is connected by a bridge 36 as a projection.
  • the bridge 3 6, d-axis magnetic flux M D and magnet flux MP is the magnetic path simultaneously flowing. Accordingly, conversely to the direction of flow of the direction and the magnetic flux MP of flow of the d-axis flux MD, Te Gotsu cancel each other, so that actively reduce the flow of d-axis magnetic flux M D in the pre Tsu di 3 6, The d-axis magnetic flux M D flowing across the salient poles 22 is reduced accordingly.
  • the thickness 4 of the protrusion 35 is shorter than the width w of the permanent magnet 24, and the distance between the permanent magnet 24 and the outer peripheral surface S1 is the radial thickness of the bridge 36. Less than 4.
  • the outer green portion 24 a as one side of the permanent magnet 24 is radially outward from a line L 1 extending in the circumferential direction from the base end b of the bridge 36, and The inner side portion 24 b as the upper portion is positioned radially inward of the line L 1, that is, on the side of the rotary shaft 21.
  • FIG. 14 shows a first position of the rotor in the tenth embodiment of the present invention
  • FIG. 15 shows a second position of the rotor in the tenth embodiment of the present invention
  • FIGS. 16 and 17 show flows of q flux and d-axis flux in the tenth embodiment of the present invention.
  • FIG. ' In this case, between the permanent magnets 24 in the salient poles 22, for example, in the center of the salient poles 22, in the vicinity of the outer peripheral edge as the periphery of the stator 14 side, the air gap 51 force, the salient poles 2 and are formed in parallel with the respective permanent magnets 24.
  • An outer peripheral portion 51 a as one part of the gap 51 is provided near an outer peripheral green as a periphery on the stator 14 side, and an inner green portion 5 as the other edge of the gap 51. 1 b is located closer to the rotor yoke 21 than the inner edge 24 b as the other edge of the permanent magnet 24.
  • a gap 51 is formed near the outer peripheral edge at the center of the salient pole 22, and as the position of the rotor 11 with respect to the stator 14 fluctuates, a plurality of stator poles 16 are formed.
  • d ⁇ flux M D is not flow to pass through between each stearyl one Tapo Ichiru 1 6 without via the air gap 5 1, always passes through the air gap 5 1 Will be.
  • the d-axis magnetic flux M D can be sufficiently reduced, and the q-axis magnetic flux M Q can be increased accordingly.
  • the fluctuation of the torque T is reduced, and the average torque can be increased.
  • FIG. 17 is a diagram showing the flows of the q flux and the d flux in the eleventh embodiment of the present invention.
  • a gap 51 is provided between the permanent magnets 24 in the salient poles 22 and extends along the projecting direction of the salient poles 22 to the outer peripheral surface S1 as the peripheral surface of the salient poles 22 Then, two pieces are formed in parallel with each of the permanent magnets 24 described above.
  • the d-axis magnetic flux M D can be further reduced sufficiently, and the q-axis magnetic flux M Q can be increased accordingly.
  • the difference ⁇ ⁇ ⁇ ⁇ becomes large, so that the torque T can be made sufficiently large.
  • FIG. 18 is a sectional view of a reluctance motor according to a 12th embodiment of the present invention
  • FIG. 19 is a sectional view of a main part of the reluctance motor according to the 12th embodiment of the present invention.
  • the air gap 51 force It is formed along the direction in which the poles 22 project and in parallel with the permanent magnets 2, and is buried in the gap 51 with the same arrangement of the permanent magnets 24 and the same polarity as the other permanent magnets 2. It will be arranged depending on the situation.
  • the length of the permanent magnet 24 in the air gap 51 is reduced to a force equal to the length of the other permanent magnets 24.
  • a gap 52 is formed radially inward of the gap 51 along the direction in which the salient poles 22 project and parallel to the permanent magnets 24.
  • a gap 51 is formed near the outer circumference ⁇ S 1 at the center of the salient pole 22, and the permanent magnet 24 is disposed in the gap 51, so that the port for the stator 14 is formed.
  • d ⁇ magnetic flux M D d ⁇ magnetic flux M D
  • air gap 51 air gap 51
  • permanent magnet 24 do not pass through It does not flow directly between the stator poles 16, but always passes through the air gap 51 and the permanent magnet 24.
  • d-axis magnetic flux M D is suppressed to about to flow by bypassing the inside from the gap 5 2.
  • the d-axis magnetic flux M D can be sufficiently reduced, and the q-axis magnetic flux M Q can be increased accordingly.
  • the fluctuation of the torque T is reduced, and the average torque can be increased.
  • a magnetic path in which the d-axis magnetic flux M D and the magnet magnetic flux M p flow simultaneously is formed in the salient pole 22. Then, d ⁇ flux M is reversed and the direction of flow of the direction and the magnetic flux MP of flow of D, cancel each other, so that actively reduce the flow of d-axis magnetic flux M D in stator teeth 2 a 2, butt The d-axis magnetic flux M D flowing across the pole 22 is reduced accordingly.
  • the magnetic resistance is correspondingly small no longer to the flow of q ⁇ flux M Q salient poles 2 in 2, q-axis magnetic flux M. Increase. Then, since the difference M increases, the torque T can be sufficiently increased.
  • a thirteenth embodiment of the present invention will be described. It is to be noted that, for those having the same structure as that of the second embodiment, the description thereof will be omitted by giving the same reference numerals.
  • FIG. 20 is a sectional view of the rotor according to the thirteenth embodiment of the present invention
  • FIG. 21 is a sectional view of a main part of the rotor according to the thirteenth embodiment of the present invention.
  • the first holding portion P3 has a slit 31 as a notch portion, and a projecting direction of the salient pole 22 from the outer side portion 24a as one side of the permanent magnet 24.
  • the slit 31 extends in the axial direction of the rotor 11 to form an air gap, and the width r of the slit 31 is smaller than the thickness d of the permanent magnet 24.
  • the permanent magnet 24 is held by two projecting portions 55, 56.
  • the outer circumference of the adjacent salient poles 22 on the stator 14 side is connected by a bridge 36 as a protruding portion.
  • the bridge 3 6, d-axis magnetic flux M D and magnet flux M F is a magnetic path simultaneously flowing. Therefore, the direction in which the d-axis magnetic flux M D flows and the direction in which the magnet magnetic flux M P flows are opposite to each other and cancel each other, so that the flow of the d magnetic flux M D in the prism 36 is actively reduced.
  • the d ⁇ magnetic flux M D flowing across the salient pole 2 2 is reduced accordingly.
  • the magnetic resistance to the flow of the q-axis magnetic flux M Q in the salient pole 22 becomes smaller by that amount, and the q ⁇ magnetic flux M Q increases. Then, since the difference ⁇ increases, the torque T can be sufficiently increased.
  • FIG. 22 is a sectional view of a main part of a rotor according to a 14th embodiment of the present invention.
  • the permanent magnet 24 is one tapered projection-
  • a tapered surface 58 is formed on the outer side portion 24 a as one side of the permanent magnet 24 so as to face the tapered protrusion 57.
  • the permanent magnet 24 is held by the tapered protrusion 57, so that the first holding portion P 3
  • the applied force can be reduced, and the deformation in the area AR 11 can be prevented.
  • the durability of the first holding portion P3 can be increased.
  • FIG. 23 is a sectional view of a main part of a rotor according to a fifteenth embodiment of the present invention.
  • the permanent magnet 24 is made up of two tapered projections.
  • tapered surfaces 62 and 63 are formed on the outer side 24a as one side of the permanent magnet 24 so as to face the tapered protrusions 60 and 61. You.
  • the permanent magnet 24 when centrifugal force is applied to the permanent magnet 24 with the rotation of the rotor 11, the permanent magnet 24 is held by the tapered projections 60 and 61, and the first holding is performed.
  • the force applied to the portion P3 can be reduced, and the deformation in the area AR11 can be prevented.
  • the durability of the first holding portion P3 can be increased.
  • FIG. 24 is a sectional view of a main part of a rotor according to a sixteenth embodiment of the present invention.
  • the permanent magnet 24 is held by one protruding part 64.
  • the outer circumferential distance between the adjacent salient poles 22 as the stator 14 side circumference Are connected by a bridge 36 as a protrusion.
  • the bridge 3 6, d-axis magnetic flux - M D and magnet flux M P is the magnetic path simultaneously flowing. Therefore, the d-axis magnetic flux M is reversed and the direction of flow of the direction and the magnetic flux M P of the flow of D, cancel each other, so that actively reduce the flow of d-axis magnetic flux M D in the pre Tsu di 3 6 , d ⁇ flux M D flowing across the stator teeth 2 within 2 decreases correspondingly.
  • a part of the outer side portion 24 a as one edge portion of the permanent magnet 24 is positioned on an outer peripheral surface S 1 as a peripheral surface of the salient pole 22 on the side of the stator 14. Since is disposed, between the outer ⁇ 2 4 a and the outer peripheral surface S 1 can you to prevent tends to flow d-axis magnetic flux M D. Therefore, the flow of the d flux M D can be almost completely eliminated.
  • FIG. 25 is a sectional view of a main part of a rotor according to a seventeenth embodiment of the present invention.
  • the permanent magnet 24 in the first holding portion P3, the permanent magnet 24 is held by the two projecting portions 55, 56. Further, a part of the outer side portion 24 a as one side of the permanent magnet 24 is positioned on the outer peripheral surface S 1 as the outer peripheral surface of the salient pole 22 on the side of the stay 14. Is arranged.
  • an eighteenth embodiment of the present invention will be described. The components having the same structure as that of the sixteenth embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • FIG. 26 is a cross-sectional view of a main part of the rotor in the eighteenth embodiment of the present invention.
  • the permanent magnet 24 in the first holding portion P3, the permanent magnet 24 is held by one tapered protrusion 67.
  • a tapered surface 68 is formed on the outer side portion 24 a as one side of the permanent magnet 24 so as to face the tapered protrusion 67.
  • a part of the outer edge portion 24a is disposed on an outer peripheral surface S1 as a peripheral surface of the salient pole 22 on the stator 14 side.
  • FIG. 27 is a sectional view of a rotor according to a nineteenth embodiment of the present invention.
  • the permanent magnet 2 is held by the two projecting portions 55, 56. Further, a part of the outer portion 24 a as one green portion of the permanent magnet 24 is located on the outer circumferential surface S 1 as the outer circumferential surface of the salient pole 22 on the stator 14 side. It is arranged to be. Further, gaps 71 and 72 are formed between the protrusions 55 and 56 and the permanent magnet 2.
  • FIG. 28 is a sectional view of a rotor according to a twenty-second embodiment of the present invention.
  • the thickness of the prism 36 in the radial direction is gradually reduced as the distance from the base end b of the salient pole 22 is increased.
  • FIG. 29 is a sectional view of a rotor according to a twenty-first embodiment of the present invention.
  • the thickness of the prism 36 in the radial direction is gradually reduced as the distance from the base end b of the salient pole 22 is reduced.
  • a step c is formed between the outer peripheral surface S 1 of the salient pole 22 and the outer peripheral surface S 4 of the protruding portion 36 as the outer peripheral surface of the stator 14 and the stator 14. Is formed.
  • the pre Tsu di 3 6, d-axis magnetic flux M D and magnet flux MP is the magnetic path simultaneously flowing.
  • FIG. 30 is a sectional view of a rotor according to a twenty-second embodiment of the present invention.
  • the thickness of the prism 36 in the radial direction is gradually reduced as the distance from the base end b of the salient pole 22 is increased. Also, the inner peripheral surface S 5 of the protrusion 36 is flat.
  • FIG. 31 is a sectional view of a rotor according to a twenty-third embodiment of the present invention.
  • the outer peripheral edge as the circumference on the side of the stator 14 is connected by a bridge 36 as a protruding portion.
  • the bridge 3 6, d ⁇ flux M D and magnet flux MP is the magnetic path simultaneously flowing. Therefore, it is the opposite to the direction of flow of the direction and the magnetic flux M F of flow of the d-axis flux MD, Te Gotsu cancel each other, so that actively reduce the flow of d-axis magnetic flux M D in the pre Tsu di 3 6
  • the d ⁇ magnetic flux M D flowing across the salient poles 22 is reduced accordingly.
  • the magnetic resistance to the flow of the q-axis magnetic flux M Q in the salient pole 22 becomes smaller by that amount, and the q flux ⁇ . Increase. Then, since the difference ⁇ increases, the torque T can be sufficiently increased.
  • the thickness 4 of the protrusion 35 is smaller than the width w of the permanent magnet 24, and the distance between the permanent magnet 24 and the outer peripheral surface S1 is the radial thickness of the bridge 36. 5 Less than 4. Further, the length of the salient pole 22 in the radial direction is substantially equal to the width w of the permanent magnet 24, and the inner side 24 b as the other side of the permanent magnet 24 is formed by the rotor yoke 21. It is located nearby.
  • FIG. 32 is a sectional view of a rotor according to a twenty-fourth embodiment of the present invention.
  • a gap 51 is formed between the permanent magnets 24 in the salient poles 22 along the projecting direction of the salient poles 22 and in parallel with the respective permanent magnets 24. It is arranged by embedding the permanent magnets 24 in 1 and the same polarity arrangement as the other permanent magnets 24. Further, the length of the salient pole 22 in the radial direction is substantially equal to the width w of the permanent magnet 24, and the inner side 24 b as the other side of the permanent magnet 24 is connected to the mouth 21 Is located in the vicinity of.
  • stator teeth 2 flowing in 2 d ⁇ flux M D is suppresses to tend to flow by bypassing the radially inward from the permanent magnet 2 4.
  • the magnetic resistance to the flow of the q-axis magnetic flux MQ in the salient poles 2 2 becomes smaller by that amount, and the q flux M. Increase.
  • the torque T can be sufficiently increased.
  • FIG. 33 is a sectional view of a rotor according to a twenty-fifth embodiment of the present invention.
  • a slit 31 as a notch is formed in the first holding portion P3.
  • the length of the salient pole 22 in the radial direction is substantially equal to the width w of the permanent magnet 24, and the inner edge 24b as the other edge of the permanent magnet 2 is rotatable. It is located near.
  • the outer circumferential portion 24 a as one portion of the permanent magnet 24 and the outer circumferential surface S 1 as the circumferential surface on the stator side of the salient pole 22 are bypassed to d d flux M D Not only do not attempt to flow, but also suppress the d-axis magnetic flux MD that flows through the salient poles 22 from flowing around the permanent magnet 24 radially inward. Can be. As a result, it is possible to eliminate the flow of d ⁇ flux M D almost completely, it is possible to increase the difference delta Micromax, it is possible to sufficiently increase the torque T.
  • each salient pole 22 is formed such that it projects radially outward from the rotor yoke 21 with a predetermined width to form each salient pole 22. It can also be formed to project outward so that the width gradually decreases.
  • each permanent magnet 24 is disposed along both end surfaces S2 of each salient pole 22 and in parallel with both end surfaces S2, similarly to the above-described embodiments.
  • This invention can be utilized for the electric device which outputs rotation by driving a reluctance motor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Abstract

La présente invention concerne un moteur à réluctance capable d'augmenter suffisamment le couple et sortie, des aimants permanents aplatis (24) sont placés sur des bords opposés (S2) de pôles saillants (22) en porte à faux depuis une culasse (21) de rotor. Un bord de chaque aimant permanent est placé à proximité d'un bord périphérique sur le côté stator (14) d'un pôle saillant (22) et sur la longueur d'une direction de projection d'un pôle saillant (22), leurs polarités étant identiques. Les flux magnétiques des aimants (Mp) forment des boucles courtes jusqu'à saturation. L'environnement des aimants permanents (24) fonctionnant virtuellement comme des entrefers. Par conséquent, une réluctance par rapport au flux d'axe d augmente alors que l'inductance d'axe d diminue.
PCT/JP2000/001641 1999-03-17 2000-03-17 Moteur a reluctance WO2000055961A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP11/72691 1999-03-17
JP7269199 1999-03-17

Publications (1)

Publication Number Publication Date
WO2000055961A1 true WO2000055961A1 (fr) 2000-09-21

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PCT/JP2000/001641 WO2000055961A1 (fr) 1999-03-17 2000-03-17 Moteur a reluctance

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WO (1) WO2000055961A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2966297A1 (fr) * 2010-10-14 2012-04-20 Renault Sa Rotor de machine electrique a reluctance commutee et machine equipee d'un tel rotor
US20140159529A1 (en) * 2012-12-11 2014-06-12 Mcmaster University Switched reluctance machine with rotor excitation using permanent magnets
CN104638864A (zh) * 2015-02-16 2015-05-20 武汉华大新型电机科技股份有限公司 永磁电机及提高永磁电机转速的方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924130A (en) * 1988-04-21 1990-05-08 Antonino Fratta Reluctance synchronous electric machine having intrinsic phase correction means
JPH09331661A (ja) * 1996-06-11 1997-12-22 Matsushita Electric Ind Co Ltd リラクタンスモータ
JPH1127913A (ja) * 1997-07-01 1999-01-29 Toshiba Corp リラクタンス型回転電機
JP2000175416A (ja) * 1998-09-29 2000-06-23 Toshiba Corp 永久磁石式リラクタンス型回転電機の回転子

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4924130A (en) * 1988-04-21 1990-05-08 Antonino Fratta Reluctance synchronous electric machine having intrinsic phase correction means
JPH09331661A (ja) * 1996-06-11 1997-12-22 Matsushita Electric Ind Co Ltd リラクタンスモータ
JPH1127913A (ja) * 1997-07-01 1999-01-29 Toshiba Corp リラクタンス型回転電機
JP2000175416A (ja) * 1998-09-29 2000-06-23 Toshiba Corp 永久磁石式リラクタンス型回転電機の回転子

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2966297A1 (fr) * 2010-10-14 2012-04-20 Renault Sa Rotor de machine electrique a reluctance commutee et machine equipee d'un tel rotor
WO2012049405A3 (fr) * 2010-10-14 2012-08-09 Renault S.A.S. Rotor de machine electrique a reluctance commutee et machine equipee d'un tel rotor
US20140159529A1 (en) * 2012-12-11 2014-06-12 Mcmaster University Switched reluctance machine with rotor excitation using permanent magnets
US10608489B2 (en) * 2012-12-11 2020-03-31 Enedym Inc. Switched reluctance machine with rotor excitation using permanent magnets
CN104638864A (zh) * 2015-02-16 2015-05-20 武汉华大新型电机科技股份有限公司 永磁电机及提高永磁电机转速的方法

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