WO2015104795A1 - Machine électrique rotative - Google Patents

Machine électrique rotative Download PDF

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Publication number
WO2015104795A1
WO2015104795A1 PCT/JP2014/050095 JP2014050095W WO2015104795A1 WO 2015104795 A1 WO2015104795 A1 WO 2015104795A1 JP 2014050095 W JP2014050095 W JP 2014050095W WO 2015104795 A1 WO2015104795 A1 WO 2015104795A1
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WO
WIPO (PCT)
Prior art keywords
stator
rotor
magnet
back yoke
circumferential side
Prior art date
Application number
PCT/JP2014/050095
Other languages
English (en)
Japanese (ja)
Inventor
榎本　裕治
Original Assignee
株式会社日立製作所
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Publication date
Application filed by 株式会社日立製作所 filed Critical 株式会社日立製作所
Priority to PCT/JP2014/050095 priority Critical patent/WO2015104795A1/fr
Publication of WO2015104795A1 publication Critical patent/WO2015104795A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/16—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having annular armature cores with salient poles
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/22—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating around the armatures, e.g. flywheel magnetos
    • H02K21/222—Flywheel magnetos

Definitions

  • the present invention relates to a rotating electrical machine.
  • increasing the amount of magnets mounted to improve the gap magnetic flux density can be considered as a method of improving the output with the same physique.
  • the torque can be increased by increasing the radial position of the gap portion that outputs torque as much as possible, and the output can be improved.
  • the motor described in Patent Document 1 eliminates the stator-side tee score in order to arrange the gap surface contributing to torque output in the outer diameter direction as much as possible, A method is adopted in which a coil mounted as thin as possible is arranged on the inner surface of a thin back yoke, the torque output surface is set in the radial direction, a magnet rotor is arranged on the inner peripheral side, and the magnet amount is increased. Yes. Further, as another method for increasing the output, the motor described in Patent Document 2 has a rotor arranged in a double structure inside and outside to increase the amount of magnets and increase the torque. .
  • Patent Document 1 since it is necessary to arrange a plurality of coils formed by winding a conductor, in the case of a three-phase motor, the overlapping portion requires a coil thickness corresponding to three phases in the radial direction. Therefore, the space factor of the coil part that contributes most to the torque output is reduced, the volume of the coil end part that contributes little to the torque output including the overlapping part is increased, the coil resistance is increased, and the copper loss is increased. There is a problem that it ends up. In addition, manufacturing the above-described overlapping portion in a compact manner requires a very complicated process.
  • Patent Document 2 in order to have the magnet rotor on two surfaces in the circumferential direction, it is necessary to form a coil by winding a conductor around a slot portion between adjacent teeth of the stator core. Since the radial width of the part constituting the outer outer rotor type motor and the part constituting the inner inner rotor type motor is required to be large, the inner rotor diameter is larger than the outer rotor diameter. Since the gap surface of the inner rotor becomes the inner diameter side, there is a problem that the torque is reduced. Further, it is very difficult to wind the slots having different sizes and shapes on the inner side and the outer side, and it seems difficult to mount a coil having a high space factor.
  • An object of the present invention is to realize a structure of a rotating electrical machine in which a gap diameter for torque output is as large as possible, a magnet mounting amount is increased, and a coil can be easily mounted.
  • a stator an inner circumferential rotor disposed on the inner circumferential side of the stator, and an outer circumferential rotor disposed on the outer circumferential side of the stator, the stator including a stator back yoke core and The stator back yoke core is cylindrical, and the stator coil is concentratedly wound around the stator back yoke core in such a direction that magnetic flux flows in the circumferential direction of the stator.
  • the inner circumferential rotor includes an inner circumferential back yoke and an inner circumferential rotor magnet, the inner circumferential back yoke is disposed on the inner circumferential side of the inner circumferential rotor, and the inner circumferential rotor is arranged.
  • the outer circumferential side rotor magnet is disposed on the outer circumferential side of the outer circumferential side rotor, the outer circumferential side rotor has an outer circumferential side back yoke and an outer circumferential side rotor magnet, and the outer circumferential side back yoke is disposed on the outer circumferential side of the outer circumferential side rotor.
  • An outer peripheral rotor magnet is disposed on the inner peripheral side of the outer peripheral rotor, and the magnet pole of the inner peripheral rotor magnet;
  • a rotary electric machine and the magnet poles is the same pole of the outer periphery side rotor magnet facing the magnet poles of the periphery side rotor magnets.
  • FIG. 1 is an exploded view showing a part of an entire rotating electrical machine according to an embodiment of the present invention. It is a perspective view which shows the stator structure which concerns on one Embodiment of this invention. It is a cross-sectional view showing a rotating electrical machine structure according to an embodiment of the present invention.
  • FIG. 1 It is a perspective view which shows the axial rotary electric machine structure which concerns on one Embodiment of this invention. It is a figure which shows the stator structure of the large diameter thin rotary electric machine which concerns on one Embodiment of this invention. It is the perspective view which showed the rotor structure of the large diameter thin rotary electric machine which concerns on one Embodiment of this invention. It is the perspective view of the stator shown regarding the structure which arrange
  • FIG. 1 is a cross-sectional view showing the overall structure of a large-diameter thin rotary electric machine according to an embodiment of the present invention. It is sectional drawing which shows the structure of the linear drive motor which concerns on one Embodiment of this invention. It is sectional drawing which shows the magnet orientation of the linear drive motor which concerns on one Embodiment of this invention. It is sectional drawing which showed the various orientation state of the magnet of the magnet rotor which concerns on one Embodiment of this invention.
  • FIG. 1 is a perspective view of a stator and a rotor of a rotating electrical machine according to an embodiment of the present invention.
  • the rotary electric machine shown in FIG. 1 is a so-called slotless rotary electric machine.
  • the slotless type rotating electrical machine is structurally characterized in that the surface of the coil is exposed on the gap surface facing the rotor without having teeth on the iron core (core) of the stator.
  • the rotating electrical machine 100 includes an inner circumferential rotor 10 disposed on the inner circumferential side of the stator 20, a stator 20, and an outer circumferential rotor 30 disposed on the outer circumferential side of the stator 20.
  • the inner circumferential rotor 10 includes an inner circumferential rotor back yoke 11 and an inner circumferential rotor magnet 12.
  • the stator 20 has a stator back yoke core 21 and a stator coil 22.
  • the outer rotor 30 includes an outer rotor back yoke 31 and an outer rotor magnet 32.
  • the cylindrical The stator coil 22 is configured by concentrated winding in such a direction that magnetic flux flows in the circumferential direction of the stator. By doing so, the coil end portions that do not contribute to the torque other than the stator coil 22 that is arranged in the gap and contributes to the torque become compact, and the copper loss of the stator coil 22 can be reduced. Further, by having such a stator structure, since the surface of the stator coil 22 is arranged on the inner peripheral surface and the outer peripheral surface of the cylindrical stator back yoke core 21, both of them are output as torque. Can be used as a surface.
  • a rotor 100 shown in FIG. 1A has a double structure of an inner circumferential rotor 10 and an outer circumferential rotor 30.
  • the inner circumferential rotor 10 has an inner circumferential back yoke 11 on the inner circumferential portion of the inner circumferential rotor 10, and is provided on the surface of the inner circumferential back yoke 11, that is, on the outer circumferential portion of the inner circumferential rotor 10.
  • the inner rotor magnet 12 is arranged in a circumferential shape. A four-pole magnet arrangement is shown, and the inner circumferential rotor magnet N pole 12a and the inner circumferential rotor magnet S pole 12b are arranged adjacent to each other.
  • the outer rotor 30 has a back yoke 31 disposed on the outer peripheral side of the outer rotor 30, and an outer rotor magnet 32 inside the back yoke 31, that is, on the inner peripheral side of the outer rotor 30. It is the composition which arranges.
  • Four poles having the same number of poles as the inner circumferential rotor 10 are arranged so that the outer circumferential magnet poles facing the inner circumferential magnet poles have the same poles. That is, the outer circumferential rotor magnet N pole 32a on the side facing the inner circumferential rotor magnet N pole 12a is an N pole, and the outer circumferential rotor magnet S pole 32b facing the inner circumferential rotor magnet S pole 12b.
  • FIG. 1B shows a perspective view of a structural diagram in which the stator 20 is disposed between the inner peripheral rotor 10 and the outer peripheral rotor 30 of the double structure.
  • FIG. 2 is a cross-sectional view of various rotating electrical machine structures for showing the superiority of one embodiment of the present invention, and the structure of the slotless motor of the present invention is compared with the structure of other general rotating electrical machines. Shown in cross section. In this comparison, the outermost diameter of the rotating electrical machine is fixed to 30 mm and all motors are compared with a 4-pole magnet rotor. What kind of rotating electrical machine can be configured in the same cross section? It is a comparison.
  • the stator coil 22 is composed of a plurality of units, and each of the plurality of units is composed of six concentrated winding coils. A plurality of units are each composed of six concentrated winding coils, so that a distributed winding coil arrangement can be made.
  • FIG. 2 (a) shows the outer rotor structure of the slotless motor.
  • the slotless motor has an outer peripheral rotor back yoke 31 on the outer peripheral side, and an outer peripheral rotor magnet 32 (outer peripheral rotor magnet N pole 32a, outer peripheral rotation on the inner peripheral side of the outer peripheral rotor back yoke 31.
  • the child magnet S pole 32b) is arranged.
  • the stator coil 22 is disposed on the inner periphery side of the outer rotor magnet 32, and the gap diameter between the outer rotor magnet 32 and the stator coil 22 is ⁇ 25 mm.
  • the stator coil 22 has a structure having six coils with respect to a quadrupole magnet, and each coil has two cross sections, and thus has a structure having 12 coil cross sections in total. . Since the twelve coil cross sections are equally arranged at an angle of 360 degrees, the arrangement angle between the coil cross sections has an angle of 30 degrees. Further, when one cross section of the U-phase coil is disposed at the position of 22u +, it is necessary that the opposite cross-section of the U-phase coil be disposed at a pitch of 120 degrees so as to be the position indicated by 22u ⁇ .
  • the coil end portion 23 connecting the coil cross section 22u + and the coil cross section 22u- has a shape as shown by a dotted line, and prevents them from interfering with coil ends of other phases (V phase, W phase). It is comprised so that it may become coil end arrangement
  • FIG. 2 (b) shows the inner rotor type structure of the slotless motor.
  • the slotless motor has an inner circumferential rotor back yoke 11 on the inner circumferential side, and an inner circumferential rotor magnet 12 (inner circumferential rotor magnet N pole 12a on the outer circumferential side of the inner circumferential rotor back yoke 11.
  • the inner rotor magnet S pole 12b) is arranged.
  • a stator coil 22 is arranged on the outer peripheral side of the inner circumferential rotor magnet 12, and the gap diameter between the inner circumferential rotor magnet 12 and the stator coil 22 is the same as in FIG. 2 (a). ⁇ 25mm.
  • the stator coil of FIG. 2B has a structure having 12 coil cross sections with 6 coils with respect to a 4-pole magnet, similarly to the outer rotor type shown in FIG.
  • the twelve coil cross sections are equally arranged at an angle of 360 degrees, and the arrangement angle between the coil cross sections has an angle of 30 degrees.
  • the opposite-side section of the U-phase coil needs to be disposed at a 120-degree pitch so as to be positioned at 22u ⁇ .
  • the coil end portion 23 connecting the coil cross section 22u + and the coil cross section 22u- has a shape as shown by a dotted line, and prevents them from interfering with coil ends of other phases (V phase, W phase).
  • the inner rotor type coil end portion 23 exists above and below the paper as in the previous case, and the bulges to avoid mutual interference are the inner circumferential rotor magnet N pole 12a on the inner circumferential side, the inner circumferential side In order not to interfere with the rotor magnet S pole 12b, it is necessary to take measures by arranging it in the outer peripheral side direction.
  • FIG. 2 (c) shows a cross-sectional view of a slot type rotating electrical machine which is the most common rotating electrical machine. Similar to FIGS. 2A and 2B, it has a four-pole configuration. However, since the teeth are formed on the stator back yoke core 21, the teeth are formed on the inner peripheral side in order to form a coil placement slot formed between the teeth. . Therefore, the rotor diameter becomes smaller than that in the case of FIG. For this reason, in this example, the opposing surface (gap part diameter) of the inner peripheral rotor magnet 12 and the stator 20 is ⁇ 15 mm.
  • FIGS. 2 (a) and 2 (b) show a concentrated winding structure in which the stator coil 22 is intensively wound around the teeth. Similar to FIGS. 2 (a) and 2 (b), a distributed winding method having a pitch of 120 degrees may be employed, but concentrated winding is employed in a relatively small motor to reduce copper loss. There are many cases. In this concentrated winding, the coil end portion 23 connecting the coil cross-section 22u + in the slot and the coil cross-section 22u- on the opposite side only needs to have a tooth width as shown in the figure, so that the coil is very compact. Moreover, since it does not interfere with coils of other phases (V phase, W phase), it can be said that the structure is simple.
  • FIG. 2D shows a rotating electrical machine structure according to the embodiment of the present invention described in FIG.
  • a compact stator coil 22 similar to concentrated winding is disposed on a cylindrical stator back yoke core 21 having a thin dimension in the radial direction. Since the stator coil 22 is concentrated winding, the coil end portion 23 can be very small. Further, when the U-phase coil is seen, it can be seen that the outer coil is always paired with the outer coil section 22u ⁇ in which the direction of current is opposite to the inner coil section 22u +. That is, they are connected so that the current directions in the axial direction of the coils of the same phase are reversed. The coil disposed at a position 120 degrees away from the coil having the U-phase cross section also operates as the U-phase.
  • the inner coil cross section 22u ⁇ has a negative direction and the outer coil cross section 22u + has a positive direction.
  • the inner portion constitutes an inner rotor type slotless motor having a distributed winding coil with a pitch of 120 degrees, and on the outer side, Similarly, it can be seen that an outer rotor type slotless motor having a distributed winding coil with a pitch of 120 degrees is configured.
  • the magnet has four poles and the inner and outer poles have the same polarity. Therefore, the gap portion has a structure in which magnetic fluxes in different directions flow. For this reason, the torque is always generated in the same direction with respect to the direction of the current and the direction of the magnetic flux.
  • FIG. 3 is a graph for comparing the torque output of the motor structure in FIG. 2, and shows a result of comparing the torque output for each rotating electrical machine structure shown in FIG. 2 under the condition that the coil current density is constant. is there. Modeling was performed by the finite element method, and the magnetic orientation of the magnet adopted radial orientation for both the inner and outer magnets. The comparison was made with the same material for the conditions of the residual magnetic flux density and the holding force of the magnet. The horizontal axis shows the rotation angle, and the vertical axis shows the output torque.
  • FIGS. 3 (a) to 3 (d) show the results of calculating the torque for the rotation angle of 180 degrees (one electrical angle period). Comparing FIG. 3 (a) and FIG. 3 (b), FIG.
  • FIG. 3 (b) is a result that a torque as high as 30% or more can be expected. This is because, when comparing Fig. 3 (a) and Fig. 3 (b), the gap diameter is the same, but the torque generation principle of the slotless motor is generated by the current (BIl rule) placed in the magnetic field. This shows that the inner rotor side in which the coil (current) is arranged in the outer diameter direction is advantageous.
  • FIG. 3 (c) also shows a torque reduction of 30% or more. This is because the diameter of the rotor magnet is reduced and the coil volume disposed in the slot is reduced.
  • the output torques of the outer peripheral side rotor and the inner peripheral side rotor are smaller than those in FIG. It can be seen that the combined torque can be increased by 20% or more compared to FIG. This is because the mounting amount of the coil cross section is increased due to the increase in the mounting amount of the magnet. Therefore, it can be said that the rotating electrical machine structure according to the embodiment of the present invention has a simple coil arrangement and can realize a high output torque.
  • FIG. 4 shows a perspective view and a cross-sectional view showing the entire rotating electrical machine according to the embodiment of the present invention.
  • FIG. 4A shows an external perspective view of the motor, but it is possible to configure an external appearance that is not different from a general rotating electrical machine.
  • a case housing 43 is provided between the stator coil holding side end bracket 41 and the end bracket 42, and a shaft (output shaft) 44 protrudes from a hole in the center of the stator coil holding side end bracket 41. Yes.
  • FIG. 4B shows a cross-sectional structure of the rotating electrical machine shown in FIG.
  • the stator 20 in which the stator coil 22 is arranged on the stator back yoke core 21 is fixed to one stator coil holding side end bracket 41 by, for example, resin bonding.
  • the stator coil 22 is bonded and fixed to the axial end surface of the stator coil holding end bracket 41 using a method such as resin molding, and is integrated.
  • the outer side of the outer peripheral portion of the stator coil holding side end bracket 41 is covered with the case housing 43, and another end bracket 42 is arranged on the opposite side of the stator coil holding side end bracket 41 in the axial direction.
  • the inner magnet back yoke 11 is fixed to the shaft 44 using a method such as press fitting, and the inner rotor magnet 12 is disposed on the surface using a method such as adhesion. ing. Furthermore, an outer peripheral side rotor holding cup 45 fixed to the shaft 44 by press-fitting or the like is provided. An outer peripheral side rotor back yoke 31 is provided inside the outer peripheral side rotor holding cup 45, and an outer peripheral side rotor magnet 32 is provided inside the outer peripheral side rotor back yoke 31. Is arranged and is rotatably supported by a bearing 46. With this structure, the inner rotor 10 and the outer rotor 30 are mechanically coupled to each other, so that the structure rotates as a structure for transmitting torque.
  • FIG. 5 shows an exploded view of the rotating electrical machine structure shown in FIG. 4, that is, an exploded view showing the entire rotating electrical machine according to an embodiment of the present invention.
  • the stator 20 is configured by fixing the stator 20 to the stator coil holding side end bracket 41, and can be configured independently by the inner circumferential side rotor 10, the outer circumferential side rotor 30, and the outer circumferential side rotor holding cup 45, It can be seen that assembly is possible with the stator 20, the inner rotor 10, the outer rotor 30, the stator coil holding end bracket 41, the end bracket 42, the bearing 46, and the like, as in a normal motor.
  • FIG. 6 is a perspective view showing the stator structure of the present embodiment.
  • FIG. 6A shows a structure in which the stator back yoke core 21 is divided into 180 degrees.
  • a stator coil 22 aligned and wound in a separate process and compactly wound is inserted and assembled.
  • the space factor of the stator coil 22 is increased, and the stator 20 that does not swell to the gap surface and interfere with the outer rotor magnet 32 can be easily manufactured.
  • an annular stator 20 can be obtained by combining two stator back yoke cores 21 assembled every 180 degrees.
  • This embodiment shows an example of a quadrupole magnet similar to the above-described embodiment.
  • the pair of stator coils 22 has a structure in which distributed winding is formed by six coils, it is convenient to assemble six coils as one unit. In the case of 4 poles, it is divided into 2 parts, but in the case of 6 poles, it may be divided into 3 parts.
  • the terminal wire is connected to the stator back yoke core 21 after inserting the terminal wire for each coil and the terminal wire is connected after the annular assembly is not limited to the above.
  • FIG. 7 shows a modified example of the rotor structure of the rotating electrical machine according to the embodiment of the present invention as the third embodiment of the present invention.
  • FIG. 7 is a cross-sectional view showing the rotating electrical machine structure of the present embodiment. The difference from the embodiment shown in FIG. 4 is that the structure has an axial rotor 50 on the surface in the axial direction of the stator coil.
  • the axial rotor 50 includes an axial magnet 52 and an axial magnet back yoke 51.
  • ⁇ Axial magnet 52 is added to increase the magnetic flux and to contribute to the torque output of the coil at the cross section that does not contribute to torque on one side.
  • the axial side magnet 52 also has the same circumferential pole as the pole of the inner rotor magnet 12 and the pole of the outer rotor magnet 32.
  • the torque generated by the current of the coil end portion 23 is generated in the same direction as the torque generated by the inner rotor magnet 12 and the outer rotor magnet 32, and the torque output can be increased. it can. It is only an additional arrangement of the axial side magnet 52, and there are few big additional subjects regarding an assembly and a structure.
  • FIG. 8 shows an example in which magnets are arranged on the axial surface based on the same concept as FIG.
  • FIG. 8 is a perspective view showing the axial rotating electrical machine structure of the present embodiment.
  • FIG. 8A shows the structure of the stator.
  • FIG. 8B shows a structure in which a stator and an axial rotor are combined.
  • the stator back yoke core 21 is wound around a cylindrical stator back yoke core 21 that is not thin in the radial direction, and a coil current is passed through the magnetic flux on the axial surface to output torque.
  • the stator coil 22 may be directly wound, or may be a method of inserting and assembling the wound one shown above.
  • a maximum of three surfaces can be used as the torque output surface.
  • this torque output surface is the inside of the cylinder, the outside of the cylinder, the upper side in the axial direction, and the lower side in the axial direction, any combination thereof can be adopted.
  • stator back yoke core 21 is a polygon such as a pentagon or a hexagon, all other surfaces can be used as torque output surfaces except for one surface for holding.
  • FIG. 9 illustrates a modification in the case of being thin and multipolar as a fourth embodiment.
  • FIG. 9 is a diagram showing a stator structure of a large-diameter thin rotary electric machine according to this embodiment, and shows the stator of the rotary electric machine according to this embodiment when the number of magnet poles is 40.
  • stator coils 22 When the number of stator coils 22 is 40 poles, the number of stator coils 22 is 10 times that of the first embodiment, and 120 pieces are required in the entire circumferential direction.
  • the stator coil 22 is inserted into the stator back yoke core 21 and assembled as shown in FIG. In this case, it is conceivable to divide it into half, but since it is a thin and large-diameter part, there is a demand to make it an integral object for improving accuracy. Therefore, the stator back yoke core 21 is integrated, a part thereof is cut out, and the stator coil 22 is inserted from the cutout part 25. Since this notch range is a unit of the stator coil 22, it has a structure in which 18 coils are notched for six coils.
  • the stator coil 22 is not provided in a region corresponding to one unit of the stator coil 22 in the stator back yoke core 21. It is good also as a structure which does not have the stator coil 22 in the area
  • the arrangement of the stator coil 22 is a structure in which U, V, and W phase coils are arranged in order as in the arrangement shown in the first embodiment.
  • the stator 20 has a stator internal cooling pipe 55. A stator internal cooling pipe 55 is disposed between the stator back yoke cores 21 divided in the axial direction.
  • FIG. 10 shows the rotor structure of the fourth embodiment.
  • FIG. 10 is a perspective view showing the rotor structure of the large-diameter thin rotary electric machine of this embodiment.
  • the structure having the inner rotor magnet 12 and the outer rotor magnet 32 is the same as in the first embodiment.
  • the rotor of this embodiment uses a structure in which a rectangular parallelepiped magnet block is attached to the inner circumferential rotor back yoke 11 and the outer circumferential rotor back yoke 31 instead of the ring-shaped magnet.
  • both the inner rotor magnet 12 and the outer rotor magnet 32 have a structure in which one pole is composed of two magnets.
  • the outer circumferential rotor holding cup 45 that holds the outer circumferential rotor magnet 32 and the outer circumferential rotor back yoke 31 is made of resin and is conscious of weight reduction.
  • the center part of the outer peripheral side rotor holding cup 45 has a metal shaft 44 and is configured to be held rotatably.
  • FIG. 11 shows a modification of the stator in the fourth embodiment.
  • FIG. 11 is a perspective view of the stator shown with respect to the structure in which the cooling pipe is arranged on the stator of the large-diameter thin rotary electric machine of the present embodiment.
  • a stator internal cooling pipe 55 for allowing a coolant such as cooling water to pass through the center part in the axial direction of the stator back yoke 21 is arranged in the same shape as the stator back yoke (for example, a square cross section), and the stator internal cooling pipe From this end, a round thin connecting pipe 56 is connected to the stator internal cooling pipe 55 by a method such as welding, and the other end is connected to the cooling pipe 57.
  • stator coil 22 pipe 56 Since the stator coil 22 pipe 56 is disposed in the notch 25 of the stator, when the stator coil 22 is inserted later as shown in FIG. 9, the stator coil 22 pipe 56 has a size smaller than the inner diameter of the stator coil 22. Since it is desirable, the stator internal cooling pipe 55 and the cooling pipe 57 are connected by a thin connecting pipe 56.
  • the cooling pipe 57 has a structure in which a coolant such as cooling water cooled by a cooling mechanism such as a radiator provided outside the motor flows.
  • a coolant such as cooling water cooled by a cooling mechanism such as a radiator provided outside the motor flows.
  • the rotating electric machine of this embodiment having a thin and large diameter can be expected to produce a very large torque output by increasing the diameter of both gap surfaces for torque output. If the value is increased, a larger torque output can be expected. For this reason, the output can be further increased by adjusting the conditions (temperature rise) for flowing current.
  • cooling is necessary to alleviate the temperature condition, it is effective to directly cool the stator coil 22, so that the stator internal cooling pipe 55 is disposed inside the stator back yoke core 21. To do.
  • the stator internal cooling pipe 55 is arranged at the center of the stator back yoke core 21 from the notch 25 in the structure shown above, and cooling water or oil is allowed to flow therethrough to cool the stator coil 22. It is the structure which performs. In order to allow the insertion of the stator coil 22, the stator internal cooling pipe 55 and its connecting pipe 56 are made smaller than the inner diameter width of the coil.
  • FIG. 12 shows an assembly perspective view and an exploded view of a thin, rotating electrical machine with a built-in cooling mechanism.
  • FIG. 12A shows the overall structure of the large-diameter thin rotary electric machine of this embodiment.
  • FIG. 12B is an exploded view of parts of the large-diameter thin rotary electric machine in FIG.
  • the structure shown in the first embodiment is a thin and multipolar structure, and there is no problem that the assembly and structure are greatly reduced.
  • FIG. 13 shows a cross-sectional structure of the large-diameter thin rotary electric machine in FIG.
  • FIG. 13 is a cross-sectional view showing the overall structure of the large-diameter thin rotary electric machine of this embodiment.
  • the central space can be used effectively, and the bearing 46 can be disposed in the space. That is, the bearing 46 is disposed on the inner peripheral side of the fixed 20 element.
  • the stator coil holding side end bracket 41 and the end bracket 42 are required on both sides.
  • the structure can be configured by only one side of the stator coil holding side end bracket 41. Therefore, it is possible to reduce the thickness.
  • FIG. 14 shows an example of a linear motor as the fifth embodiment of the rotating electrical machine.
  • FIG. 14 is a cross-sectional view showing the configuration of the linear drive motor of this embodiment.
  • the linear motor 200 includes an operating element 60 including an operating element back yoke 61 and a plurality of magnet poles 62a and 62b, an operating element 70 including an operating element back yoke 71 and a plurality of magnet poles 72a and 72b, and a plurality of magnets. It is composed of poles 62 a and 62 b, a stator back yoke 81 and a stator 80 composed of a stator coil 82.
  • a stator coil 82u ⁇ , a stator coil 82w +, a stator coil 82v ⁇ , and a stator coil 82u +, which are conductors, are wound around opposing surfaces of the plurality of magnet poles 62a, 62b, 72a, and 72b.
  • the back yoke 61 and the back yoke 71 are configured to be thin in the vertical direction in which the operating element 60 and the operating element 70 move.
  • the concentrated winding winding in which the stator coil 82 is arranged in the circumferential direction so that the magnetic flux generated by the stator coil 82 with respect to the back yoke 61 and the back yoke 71 flows in the moving direction of the operating element 61 and the operating element 71.
  • Magnet poles 72a and 72b having a plurality of poles are disposed on the side of the armature 71 disposed on the side opposite to the armature 61 side of the stator 80, and both the magnet poles 62a and 62b and the magnet poles 72a and 72b are the same. It is mounted so as to be a pole, and each magnet is mechanically connected.
  • a linear motor can have the same structure, and the stator 20 composed of six coil units is arranged linearly with respect to two poles of the magnet, and the magnet operating element is fixed in synchronization with the present invention.
  • the same effects as those of the rotating electrical machine according to the embodiment can be obtained.
  • FIG. 15 shows an example when the orientation of the magnet is changed in FIG.
  • FIG. 15 is a cross-sectional view showing the magnet orientation of the linear drive motor of this embodiment.
  • FIG. 16 is a cross-sectional view showing various orientation states of the magnet of the magnet rotor of this example.
  • the orientation state of the magnet the use of a parallel orientation magnet shown in FIG. 16 (a), the pole concentration orientation magnet shown in FIG. 16 (b), or the polar anisotropic orientation shown in FIG. 16 (c), Or the adoption of a Halbach orientation magnet can be considered.
  • the rotor magnet orientation By setting the rotor magnet orientation to the Halbach orientation, the amount of magnetic flux is increased and the torque is increased.
  • the magnet orientation may be the Halbach orientation.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

La présente invention concerne une machine électrique rotative dans laquelle un diamètre d'espace pour une sortie de couple est rendu aussi grand que possible, l'ampleur de montage d'un aimant est accrue, et le montage d'une bobine est rendu facile. La machine électrique rotative comprend un stator, un rotor côté circonférentiel interne qui est agencé sur le côté circonférentiel interne du stator, et un rotor côté circonférentiel externe qui est agencé sur le côté circonférentiel externe du stator. Le stator comprend un noyau de culasse arrière de stator et une bobine de stator. Le noyau de culasse arrière de stator présente une forme cylindrique. La bobine de stator est conçue de sorte à être enroulée de manière concentrée autour du noyau de culasse arrière de stator et orientée de sorte que le flux magnétique circule dans la direction circonférentielle du stator. Le rotor côté circonférentiel interne comprend une culasse arrière côté circonférentiel interne et un aimant de rotor côté circonférentiel interne. La culasse arrière côté circonférentiel interne est agencée sur le côté circonférentiel interne du rotor côté circonférentiel interne. L'aimant de rotor côté circonférentiel interne est agencé sur le côté circonférentiel externe du rotor côté circonférentiel interne. Le rotor côté circonférentiel externe comprend une culasse arrière côté circonférentiel externe et un aimant de rotor côté circonférentiel externe. La culasse arrière côté circonférentiel externe est agencée sur le côté circonférentiel externe du rotor côté circonférentiel externe. L'aimant de rotor côté circonférentiel externe est agencé sur le côté circonférentiel interne du rotor côté circonférentiel externe. Les pôles magnétique de l'aimant de rotor côté circonférentiel interne et les pôles magnétiques de l'aimant de rotor côté circonférentiel externe qui fait face aux pôles magnétiques de l'aimant de rotor côté circonférentiel interne ont la même polarité.
PCT/JP2014/050095 2014-01-08 2014-01-08 Machine électrique rotative WO2015104795A1 (fr)

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JP2018064402A (ja) * 2016-10-14 2018-04-19 マツダ株式会社 アキシャルギャップ型回転電機
EP3422542A1 (fr) * 2017-06-30 2019-01-02 Wilo Se Moteur à champ tournant
JP2019193485A (ja) * 2018-04-27 2019-10-31 住友重機械工業株式会社 回転電動機
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