Rotating electric machines and linear motors

Abstract

To provide a rotating electric machine and a linear motor with a high operating point for the magnet. [Solution] The rotating electric machine 100 according to this disclosure comprises a rotor 1 and a stator 5 having a plurality of teeth 7 arranged with an air gap between the rotor 1 and a stator core 6 that protrudes toward the rotor 1, windings 8 wound around each tooth 7, and stator magnets 9 arranged between adjacent teeth 7 and provided on the rotor 1 side of the windings 8, wherein a circumferential magnetic flux toward the circumferential direction and a radial magnetic flux toward the rotor 1 side are formed within the stator magnets 9.

Description

Technical Field

[0001] The present disclosure relates to a rotating electric machine and a linear motor.

Background Art

[0002] In recent years, there have been demands for higher torque and higher output in rotating electric machines. In particular, in a magnetic gear motor that rotates a high-speed rotor with an alternating current applied to a stator winding and rotates a low-speed rotor corresponding to an output shaft by the principle of a magnetic gear, it is necessary to improve the performance of magnets provided in the stator or the like to improve the output. In order to improve the performance of the magnet, it is required to increase the operating point of the magnet, that is, the total magnetic flux density obtained by applying magnetization of the magnet to the magnitude of the external magnetic field. For example, Patent Document 1 discloses a magnetic gear motor in which a stator is composed of a first stator core and a second stator core having a magnet yoke portion, and the magnetic flux density is increased to improve the output.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a conventional rotating electric machine, there is a problem that the radial magnetic flux leaks from the stator magnet and a magnetic circuit having a high magnetic resistance is formed in the winding, the operating point of the stator magnet becomes low, and the stator magnet is likely to be demagnetized.

[0005] The present disclosure has been made to solve the above problems, and an object thereof is to provide a rotating electric machine and a linear motor having a high operating point of a magnet.

Means for Solving the Problems

[0006] The rotating electric machine according to this disclosure comprises a rotor and a stator having a plurality of teeth arranged with an air gap between them and the rotor, protruding from the stator core toward the rotor side, windings wound around each tooth, and stator magnets arranged between adjacent teeth and provided on the rotor side of the windings, wherein circumferential magnetic flux toward the circumferential direction and radial magnetic flux toward the rotor side are formed within the stator magnets.

[0007] Furthermore, the rotating electric machine according to this disclosure comprises a stator and a rotating body disposed with an air gap between it and the stator, having a rotor core and adjacent rotor magnets and pole pieces in contact with the rotor core, wherein a circumferential magnetic flux directed in the circumferential direction and a radial magnetic flux directed toward the stator side are formed within the rotor magnet.

[0008] Furthermore, the linear motor according to this disclosure comprises a stator and a movable element having a plurality of movable teeth arranged with an air gap between them and the stator, protruding from the movable core toward the stator side, windings wound around each movable tooth, and movable magnets arranged between adjacent movable teeth and provided on the stator side of the windings, wherein within the movable magnets, a magnetic flux in the direction of operation toward the direction of operation and a magnetic flux in the winding direction toward the stator side are formed. [Effects of the Invention]

[0009] According to this disclosure, by connecting the circumferential magnetic flux and radial magnetic flux within a magnet provided in at least one of the stator, rotor, and movable part, it is possible to suppress the magnetic flux leakage from the magnet to the winding and raise the operating point of the magnet. [Brief explanation of the drawing]

[0010] [Figure 1] This is a schematic diagram showing a cross-section of a rotating electric machine according to Embodiment 1. [Figure 2] This is a schematic cross-sectional view showing a part of the stator of a rotating electric machine according to Embodiment 1. [Figure 3] This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 1. [Figure 4]This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 1. [Figure 5] This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 1. [Figure 6] This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 1. [Figure 7] This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 1. [Figure 8] This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 1. [Figure 9] This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 2. [Figure 10] This is an explanatory diagram illustrating the configuration of the stator magnet of a rotating electric machine according to Embodiment 2. [Figure 11] This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 2. [Figure 12] This is an explanatory diagram illustrating the configuration of the stator magnet of a rotating electric machine according to Embodiment 2. [Figure 13] This is an explanatory diagram illustrating the configuration of the stator magnet of a rotating electric machine according to Embodiment 2. [Figure 14] This is an explanatory diagram illustrating the configuration of the stator magnet of a rotating electric machine according to Embodiment 2. [Figure 15] This is an explanatory diagram illustrating the magnetization direction of the stator magnet of a rotating electric machine according to Embodiment 3. [Figure 16] This is an explanatory diagram illustrating the configuration of the stator magnet of a rotating electric machine according to Embodiment 3. [Figure 17] This is an explanatory diagram illustrating the state in which the stator magnet of the rotating electric machine according to Embodiment 4 is attached. [Figure 18] This is an explanatory diagram illustrating the state in which the stator magnet of the rotating electric machine according to Embodiment 4 is attached. [Figure 19] This is a schematic diagram showing a cross-section of the rotating electric machine according to Embodiment 5. [Figure 20]It is an explanatory diagram for explaining the magnetization direction of the rotor magnet of the rotating electrical machine according to Embodiment 5. [Figure 21] It is an explanatory diagram for explaining the magnetization direction of the rotor magnet of the rotating electrical machine according to Embodiment 5. [Figure 22] It is a schematic diagram showing a cross section of the rotating electrical machine according to Embodiment 5. [Figure 23] It is a schematic diagram showing a cross section of the linear motor according to Embodiment 5.

Embodiments for Carrying Out the Invention

[0011] Hereinafter, embodiments according to the present disclosure will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals. In the description of the embodiments, the description of the same or corresponding parts will be omitted or simplified as appropriate.

[0012] Embodiment 1. The rotating electrical machine 100 according to Embodiment 1 will be described with reference to FIGS. 1 to 8. FIG. 1 is a schematic diagram showing a cross section of the rotating electrical machine 100 according to Embodiment 1. The rotating electrical machine 100 includes a rotor 1, a plurality of teeth 7 that are arranged via a gap with the rotor 1 and project from the stator core 6 toward the rotor 1 side, windings 8 wound around each tooth 7, and a stator 5 having stator magnets 9 arranged between adjacent teeth 7 and provided on the rotor 1 side of the windings 8. In the stator magnet 9, a circumferential magnetic flux in the circumferential direction and a radial magnetic flux toward the rotor 1 side are formed. Here, the direction parallel to the rotation axis of the rotating electrical machine 100 is the axial direction, the direction orthogonal to the rotation axis is the radial direction, and the direction of rotation about the rotation axis is the circumferential direction.

[0013] The rotor 1 is formed, for example, in a cylindrical shape and rotates about the rotation axis by the magnetic field generated in the stator 5 described later.

[0014] The stator 5 consists of a stator core 6, a plurality of teeth 7, windings 8 wound around the teeth 7, and stator magnets 9, and is arranged coaxially with the rotor 1 via an air gap. The stator magnets 9 are attached to the teeth 7 by magnetic force, adhesive, etc., and are positioned sandwiched between the teeth 7. In the circumferential direction of the stator 5, the stator magnets 9 and teeth 7 are arranged adjacent to each other, so the stator 5 according to Embodiment 1 is a consequent-pole type in which pseudo-poles appear on the surface of the teeth 7. It can also be applied to magnetic flux modulation motors, vernier motors, etc.

[0015] The stator core 6 is divided, for example, as shown in Figure 1. It may also be a single, undivided core. The stator core 6 is composed of laminated steel sheets made by stacking electromagnetic steel sheets such as silicon steel, and magnetic materials such as powdered iron cores.

[0016] The teeth 7 protrude from the stator core 6 toward the rotor 1. For example, straight teeth without circumferential irregularities are preferred. The windings 8 are wound around the teeth 7.

[0017] Multiple stator magnets 9 are arranged at the tips of the teeth 7, i.e., on the rotor 1 side, between adjacent teeth 7. Inside the stator magnets 9, a circumferential magnetic flux directed in the circumferential direction and a radial magnetic flux directed toward the rotor 1 are formed, with the circumferential magnetic flux connected to the radial magnetic flux. A stator magnet 9 in which a magnetic flux is formed in which the circumferential magnetic flux is connected to the radial magnetic flux is, for example, a bent magnetized magnet 10 shown in Figure 2, in which the magnetic flux is connected by bending from the teeth 7 side toward the air gap between it and the rotor 1. The bent magnetized magnet 10 is a polar anisotropic permanent magnet in which the easy magnetization axis, which indicates the direction in which it is easily magnetized internally, is bent. The arrows in Figure 2 show the approximate direction of the magnetic flux inside the stator magnet 9.

[0018] Inside the bent magnetized magnet 10, a magnetic flux is formed in which the circumferential magnetic flux connects to the radial magnetic flux, and the magnetic flux directions at both ends in the circumferential direction are opposite to each other. The stator core 6 is adjacent to the circumferential side surface of the bent magnetized magnet 10, and the magnetic flux of the stator magnet 9 is generated in the stator core 6, so the magnetic resistance of the magnetic circuit formed by the stator magnet 9 is reduced, and the operating point of the bent magnetized magnet 10, and thus the stator magnet 9, can be raised.

[0019] The magnetic flux inside the stator magnet 9, which is composed of bent magnetized magnets 10, will be explained in detail. Figure 3 is an explanatory diagram illustrating the magnetization direction inside the stator magnet 9, and shows a part of the axial cross-section of the stator 5 with the curvature corrected to a plane. In Figure 3, the stator magnets 9 are arranged between adjacent teeth 7, as in Figure 2, and magnetic flux is formed from each tooth 7 toward the rotor 1 side in the center between the teeth 7. If we let P1 be the position where the magnetic flux is along the circumferential direction and P2 be the position where it is along the radial direction, then the magnetic flux inside each bent magnetized magnet 10 is along the circumferential direction at two P1 locations and along the radial direction at one P2 location. And, toward P2 in the center between the teeth 7, magnetic flux is formed so that the circumferential magnetic flux flows from the side ends toward P2, that is, so that the circumferential magnetization directions of adjacent stator magnets 9 via the teeth 7 are opposite, thereby suppressing magnetic flux leakage toward the winding 8 side and increasing the operating point, i.e., the magnetic flux density, of the stator magnet 9. In Figure 3, an example is shown where P2 is in the center between teeth 7, but the position of P2 does not have to be in the center; it may be offset from the center.

[0020] Figure 4, similar to Figure 3, is an explanatory diagram illustrating the magnetization direction of the magnetic flux inside the stator magnet 9, and shows a portion of the axial cross-section of the stator 5 with the curvature corrected to a plane. As shown in Figure 4, the direction of the magnetic flux of adjacent bent magnetization magnets 10 via the teeth 7 may be alternately reversed. Even in this case, the magnetic flux bends inside the stator magnet 9, and the radial magnetic flux connects to the circumferential magnetic flux, so magnetic flux does not leak to the winding 8 side, and the operating point of the stator magnet 9 can be raised.

[0021] Furthermore, as shown in Figures 5 and 6, the bent magnetized magnet 10 may have an S / N pole on its radially inner surface (the surface on the rotor 1 side) and be magnetized so as to wrap around along the surface in contact with the teeth 7, forming a magnetic flux where the circumferential magnetic flux connects to the radial magnetic flux. For example, as shown in Figures 5 and 6, the magnetic flux at P1 at the two circumferential side ends of each bent magnetized magnet 10 is magnetized so as to be along the circumferential direction, and the magnetic flux at P2 in the center between the teeth 7 is magnetized so as to be along the radial direction. P2 does not necessarily have to be in the center between the teeth 7.

[0022] The bent magnetized magnet 10 may have multiple magnetic poles on the rotor 1 side. If the rotor 1 side has multiple magnetic poles, it is sufficient that the magnetic flux is magnetized so that it is circumferential at at least two P1 locations and so that it is magnetized so that it is circumferential at at least one P2 location. In other words, inside the bent magnetized magnet 10, the radial magnetic flux directions at the rotor 1 side are opposite to each other, and on the winding 8 side the radial magnetic flux is bent and magnetized circumferentially, and further circumferential magnetization is bent and magnetized radially, forming a magnetic flux in which the circumferential magnetic flux connects to the radial magnetic flux. Figure 5 shows bent magnetized magnets 10 with magnetic fluxes in the same direction arranged in the circumferential direction, and Figure 6 shows bent magnetized magnets 10 with magnetic fluxes in different directions arranged alternately in the circumferential direction. When arranging the bent magnetized magnets 10, which have magnetic fluxes formed in different directions, for example, two bent magnetized magnets 10 with magnetic fluxes formed in the same direction and two bent magnetized magnets 10 with magnetic fluxes in the opposite direction may be arranged, or two bent magnetized magnets 10 with magnetic fluxes formed in the same direction and one bent magnetized magnet 10 with magnetic fluxes in the opposite direction may be arranged, or bent magnetized magnets 10 with magnetic fluxes formed in different directions may be arranged every few magnets.

[0023] The bent magnetized magnet 10 used as the stator magnet 9 can be manufactured, for example, by compressing and molding alloy powder in a magnetic field molding machine while aligning the easy magnetization axis of the alloy powder in a predetermined direction to create a molded body with a straight easy magnetization axis, for example, in the shape of a rectangular parallelepiped, and then pressing the molded body into a mold to bend the easy magnetization axis and plastically process the molded body so that its shape becomes the shape of a predetermined magnet.

[0024] Figures 2 to 6 show an example in which the bent magnetized magnet 10 has a roughly square shape with a single curvature, but the shape of the bent magnetized magnet 10 may also be a shape with a convex part, or it may be a combination of multiple magnet bodies. Figure 7 shows an example of the cross-sectional shape and magnetic flux direction of the bent magnetized magnet 10. The bent magnetized magnet 10 shown in 7A of Figure 7 is a single magnet body with a convex part formed at the tip on the rotor 1 side, and the magnetic flux is magnetized so that it follows the circumferential direction at P1 at the two side ends in the circumferential direction, and the magnetic flux is magnetized so that it follows the radial direction at P2 in the center in the circumferential direction. That is, the circumferential magnetic flux is formed from both sides in the circumferential direction toward the interior, bent inside, and connected to the radial magnetic flux. The bent magnetized magnet 10 shown in 7B of Figure 7 is a single magnet body with a convex part formed at the tip on the winding 8 side, and the magnetic flux is magnetized so that it follows the circumferential direction at P1 at the two side ends in the circumferential direction, and the magnetic flux is magnetized so that it follows the radial direction at P2 in the center in the circumferential direction. Some of the magnetic flux is formed from the tip of the winding 8, while the other magnetic flux is formed inward from both sides in the circumferential direction.

[0025] The bent magnetized magnet 10 shown in 7C of Figure 7 is composed of two magnet bodies. At P1, the two circumferential side ends, the magnetic flux is magnetized so that it follows the circumferential direction, and at P2, the position where the two bent magnetized magnets 10 are in contact, the magnetic flux is magnetized so that it follows the radial direction. A circumferential magnetic flux is formed inward from the surface of each bent magnetized magnet 10 that is in contact with the teeth 7, and inside, the circumferential magnetic flux is bent and connected to the radial magnetic flux. By composing the bent magnetized magnet 10 with two magnet bodies, the mold used for magnet molding can be miniaturized. The bent magnetized magnet 10 shown in 7D of Figure 7 is composed of two magnet bodies and forms a sector shape with a central angle of 90°. At P1, the two circumferential side ends, the magnetic flux is magnetized so that it follows the circumferential direction, and at P2, the position where the two bent magnetized magnets 10 are externally tangent, the magnetic flux is magnetized so that it follows the radial direction. The two bent magnetized magnets 10 are arranged externally so as to share a common point P2, and the positions of their tips on the rotor 1 side are aligned. Furthermore, multiple magnet bodies may be combined.

[0026] Furthermore, the bent magnetized magnet 10 in Figure 8A has a sector shape with a central angle of 180° that protrudes toward the winding 8 side, and the magnetic flux is magnetized along the radial direction at P2 at the two circumferential side ends, and the magnetic flux is magnetized along the circumferential direction at P1 at the center of the circumferential direction. Inside the bent magnetized magnet 10, the radial magnetic flux is formed inward from the tip on the rotor 1 side, the radial magnetic flux is bent and connected to the circumferential magnetic flux, and then bent again and connected to the radial magnetic flux once more. The cross-section of the bent magnetized magnet 10 in Figure 8B has the same magnetic flux as 8A, and is an annular sector shape with an arc shape protruding toward the winding 8 side and a concave arc shape formed at the tip on the rotor 1 side. As with the stator magnet 9 shown in Figures 8A and 8B, the regions on both circumferential side ends and on the winding 8 side of the bent magnetized magnetized magnet 10 may be removed because they result in incomplete magnetization. Furthermore, as shown in Figure 9B of the stator magnet 9, the central part in the circumferential direction of the bent magnetized magnet 10 and the end on the rotor 1 side may also be removed because they result in incomplete magnetization. In Figures 7 and 8, the direction of the magnetic flux may be reversed. Regardless of which bent magnet 10 is used as the stator magnet 9, the circumferential magnetic flux is connected internally with the radial magnetic flux, which suppresses the leakage of magnetic flux from the stator magnet 9 to the winding 8 side. As a result, the stator magnet 9 is less likely to demagnetize, and the operating point of the stator magnet 9 can be raised.

[0027] Thus, the rotating electric machine 100 comprises a rotor 1, a stator 5 having a plurality of teeth 7 arranged with an air gap between the rotor 1 and the stator core 6, a winding 8 wound around each tooth 7, and a stator magnet 9 arranged between adjacent teeth 7 and provided on the rotor 1 side of the winding 8. Within the stator magnet 9, a circumferential magnetic flux directed in the circumferential direction and a radial magnetic flux directed toward the rotor 1 side are formed. As a result, the circumferential magnetic flux formed inside the stator magnet 9 and the radial magnetic flux are directed in opposite directions in the circumferential direction and are generated in adjacent stator cores 6. This reduces the magnetic resistance of the magnetic circuit formed by the stator magnet 9, suppresses the leakage of magnetic flux from the stator magnet 9 to the winding 8 side, makes the stator magnet 9 less susceptible to demagnetization, and raises the operating point of the stator magnet 9.

[0028] Furthermore, since the back yoke of the stator magnet 9 can be small, the leakage flux generated in the slot portion of the stator core 6 when the winding 8 is energized can be reduced, and the power factor can be improved by reducing the leakage inductance.

[0029] Furthermore, since it is not necessary to form a core, so-called back yoke, on the teeth 7 of the stator core 6 that contacts the radially outer side of the stator magnet 9, the teeth 7 can be made straight teeth, and the pre-wound winding 8 can be inserted into the stator core 6 before the stator magnet 9 is installed in the stator core 6.

[0030] Embodiment 2. The rotating electric machine 100 according to Embodiment 2 will be described using Figures 9 to 14. In Embodiment 1, an example was described in which the stator magnet 9 of the rotating electric machine 100 was composed of a bent magnetized magnet 10. However, Embodiment 2 differs in that the stator magnet 9 is composed of a magnet magnetized in the circumferential direction (hereinafter referred to as the circumferential magnetized magnet 11) and a magnet magnetized in the radial direction (hereinafter referred to as the radial magnetized magnet 12). The following description will focus on the differences from Embodiment 1, and descriptions of identical or corresponding parts will be omitted as appropriate.

[0031] Figure 9 is an explanatory diagram illustrating the magnetization direction inside the stator magnet 9, correcting the curvature to a plane and showing a portion of the axial cross-section of the stator 5. An example of the arrangement of the circumferential magnetization magnets 11 and radial magnetization magnets 12 that constitute the stator magnet 9 between the teeth 7 is shown. The stator magnet 9 is arranged between adjacent teeth 7 on the rotor 1 side of the teeth 7, with the circumferential magnetization magnets 11 and radial magnetization magnets 12 forming the stator magnet 9. Inside this stator magnet 9, a magnetic flux is formed in which the circumferential magnetic flux is connected to the radial magnetic flux, and the magnetic flux directions at both ends in the circumferential direction are opposite to each other in the circumferential direction. The stator core 6 is adjacent to the circumferential side surface of the stator magnet 9, and the magnetic flux of the stator magnet 9 is generated in the stator core 6, so the magnetic resistance of the magnetic circuit formed by the stator magnet 9 is reduced, and the operating point of the stator magnet 9 can be raised. The two circumferential magnetized magnets 11 may be magnetized to produce magnetic flux in opposite directions, and the radially magnetized magnet 12, which is magnetized so that its magnetic flux is directed toward the rotor 1, may be positioned in contact with the rotor 1 side of the circumferential magnetized magnets 11. An example using two circumferential magnetized magnets 11 and one radially magnetized magnet 12 has been shown, but multiple circumferential magnetized magnets 11 and radially magnetized magnets 12 may be used, for example, by using four circumferential magnetized magnets 11 and two radially magnetized magnets 12.

[0032] Furthermore, the stator magnet 9 can have various shapes. For example, as shown in 10A of Figure 10, the arrangement of circumferential magnets 11 and radial magnets 12 may be the same as in Figure 9, but the circumferential end faces of the circumferential magnets 11 and radial magnets 12 may be of a different shape. As shown in 10B of Figure 10, the arrangement of circumferential magnets 11 and radial magnets 12 may be the same as in Figure 9, but a gap may be formed between the two circumferential magnets 11. By forming a gap, areas where the repulsion of the radial magnets 12 is strong and the operating point is low are eliminated, thereby raising the operating point of the stator magnet 9. In addition, the amount of magnet used in unnecessary areas can be reduced. As shown in 10C of Figure 10, the arrangement of circumferential magnets 11 and radial magnets 12 may be the same as in Figure 9, but the circumferential end faces of the circumferential magnets 11 and radial magnets 12 may be of a different shape, and a gap may be formed between the two circumferential magnets 11. By creating gaps, areas where the radial magnetization magnet 12 has strong repulsion and a low operating point are eliminated, thereby raising the operating point of the stator magnet 9. Furthermore, the amount of magnet used in unnecessary areas can be reduced.

[0033] As shown in Figure 10, 10D, the stator magnet 9 may consist of a radially magnetized magnet 12 magnetized so that the magnetic flux is directed toward the rotor 1, and two circumferentially magnetized magnets 11 provided in contact with both circumferentially magnetized surfaces of the radially magnetized magnet 12, sandwiching the radially magnetized magnet 12. As shown in Figure 10, 10E, the stator magnet 9 may have the same arrangement of circumferentially magnetized magnets 11 and radially magnetized magnets 12 as in Figure 10, 10D, but the positions of the rotor 1-side end faces of the two circumferentially magnetized magnets 11 may be different from the positions of the rotor 1-side end faces of the radially magnetized magnets 12. As shown in Figure 10, 10F, the stator magnet 9 may have the same arrangement of circumferentially magnetized magnets 11 and radially magnetized magnets 12 as in Figure 10, 10D, but the positions of the rotor 1-side end faces of the two circumferentially magnetized magnets 11 may be different from the positions of the rotor 1-side end faces of the radially magnetized magnets 12. As shown in 10G of Figure 10, the stator magnet 9 has the same arrangement of circumferential magnets 11 and radial magnets 12 as in 10D of Figure 10, but the positions of the end faces of the two circumferential magnets 11 on the rotor 1 side and the winding 8 side may be different from the positions of the end faces of the radial magnets 12. The direction of the magnetic flux of the circumferential magnets 11 and radial magnets 12 may be completely reversed from the direction of the magnetic flux in 10A to 10G of Figure 10.

[0034] Furthermore, as shown in Figure 11, the stator magnet 9 may be composed of one circumferential magnetization magnet 11 and two radial magnetization magnets 12. One circumferential magnetization magnet 11 is provided between the teeth 7, and radial magnetization magnets 12 are provided on both sides of the circumferential direction with the circumferential magnetization magnet 11 in between. In this way, multiple stator magnets 9 may be provided on the rotor 1 side of the teeth 7, arranged between adjacent teeth 7, with magnetic fluxes formed inside in which the circumferential magnetic flux connects to the radial magnetic flux. For example, multiple circumferential magnetization magnets 11 and radial magnetization magnets 12 may be used, such as using two circumferential magnetization magnets 11 and four radial magnetization magnets 12. Similarly, the circumferential magnetization magnets 11 and radial magnetization magnets 12 may be arranged in different positions, or their shapes may be different.

[0035] For example, as shown in 12A of Figure 12, the position of the end face of the circumferential magnetization magnet 11 on the rotor 1 side may be different from the position of the end face of the radial magnetization magnet 12. As shown in 12B of Figure 12, the stator magnet 9 may be configured with the circumferential magnetization magnet 11 and radial magnetization magnet 12 arranged in the same way as in Figure 11, with the end face of the circumferential magnetization magnet 11 on the winding 8 side being different from the position of the end face of the radial magnetization magnet 12 on the winding 8 side. As shown in 12C of Figure 12, the stator magnet 9 may be configured with the circumferential magnetization magnet 11 and radial magnetization magnet 12 arranged in the same way as in Figure 11, with the positions of the end faces of the circumferential magnetization magnet 11 on the winding 8 side and the rotor 1 side being different from the positions of the end faces of the radial magnetization magnet 12 on the winding 8 side and the rotor 1 side. As shown in Figure 12, 12D, the stator magnet 9 may be configured such that a circumferential magnetized magnet 11 has a circumferential magnetic flux formed from one side end of the stator magnet 9 to the other side end, and two radial magnetized magnets 12 are provided on the rotor 1 side of the circumferential magnetized magnet 11, with each magnetized in opposite directions. As shown in Figure 12, 12E, the circumferential magnetized magnet 11 and radial magnetized magnets 12 may be arranged similarly to Figure 12, 12D, with a gap formed between the two radial magnetized magnets 12. By forming a gap, areas where the repulsion of the radial magnetized magnets 12 is strong and the operating point is low are eliminated, thereby raising the operating point of the stator magnet 9. In addition, the amount of magnet used in unnecessary areas can be reduced.

[0036] As shown in Figure 12, 12F, the circumferential magnetization magnet 11 and radial magnetization magnet 12 may be arranged similarly to Figure 12, 12D, with the positions of the circumferential end faces of the circumferential magnetization magnet 11 differing from the positions of the end faces of the two radial magnetization magnets 12. As shown in Figure 12, 12G, the circumferential magnetization magnet 11 and radial magnetization magnet 12 may be arranged similarly to Figure 12, 12F, with a gap formed between the two radial magnetization magnets 12. By forming a gap, areas where the repulsion of the radial magnetization magnet 12 is strong and the operating point is low are eliminated, thereby raising the operating point of the stator magnet 9. In addition, the amount of magnet used in unnecessary areas can be reduced.

[0037] In Figure 12, in 12A to 12G, the directions of the magnetic flux of the circumferential magnetization magnet 11 and the radial magnetization magnet 12 may all be reversed. In this way, by using the circumferential magnetization magnet 11, which increases the magnetic flux density in the circumferential direction, and the radial magnetization magnet 12, which increases the magnetic flux density in the radial direction, a magnetic flux is formed inside the stator magnet 9 where the circumferential magnetic flux connects to the radial magnetic flux. As a result, the magnetic flux formed inside the stator magnet 9 where the circumferential magnetic flux connects to the radial magnetic flux is in opposite directions in the circumferential direction and is generated in adjacent stator cores 6. This lowers the magnetic resistance of the magnetic circuit formed by the stator magnet 9, and suppresses the leakage of magnetic flux from the stator magnet 9 to the winding 8 side. Therefore, the stator magnet 9 is less likely to demagnetize, and the operating point of the stator magnet 9 can be raised. Furthermore, by using the circumferential magnetization magnet 11 and the radial magnetization magnet 12, the stator magnet 9 can be formed at a lower cost than by using the bent magnetization magnet 10.

[0038] Furthermore, at least one of the circumferentially magnetized magnet 11 and the radially magnetized magnet 12 may be combined with the bent magnetized magnet 10 described in Embodiment 1 to form a magnetic flux inside the stator magnet 9 in which the circumferential magnetic flux connects to the radial magnetic flux.

[0039] For example, as shown in 13A of Figure 13, the stator magnet 9 may be composed of a bent magnetized magnet 10, two circumferential magnetized magnets 11 provided at both circumferential side ends of the bent magnetized magnet 10, and a radial magnetized magnet 12 provided at the rotor 1 side tip of the bent magnetized magnet 10. At position P1 where the bent magnetized magnet 10 is in contact with the circumferential magnetized magnets 11, the magnetic flux is magnetized so that it follows the circumferential direction, and at position P2 in the circumferential center, the magnetic flux is magnetized so that it follows the radial direction. The two circumferential magnetized magnets 11 have magnetic fluxes directed from the teeth 7 side toward the bent magnetized magnet 10, and the radial magnetized magnet 12 has magnetic fluxes directed from the bent magnetized magnet 10 toward the rotor 1 side. As shown in Figure 13, 13B, the bent magnetized magnet 10, circumferential magnetized magnet 11, and radial magnetized magnet 12 are arranged similarly to Figure 13, 13A, but the positions of the rotor-side tips of the two circumferential magnetized magnets 11 may differ from the positions of the rotor-side tips of the bent magnetized magnet 10. In other words, the shape is such that both circumferential side ends of the circumferential magnetized magnet 11 and the rotor-side tip of the radial magnetized magnet 12 are removed. The removed areas are those that contribute little to motor torque. By removing parts of the circumferential magnetized magnet and the bent magnetized magnet, a stator magnet 9 with a high operating point can be manufactured and procured at low cost.

[0040] Furthermore, the positions of both circumferential side ends of the radial magnetization magnet 12 may differ from the positions of both circumferential side ends of the bent magnetization magnet 10. As shown in 13C of Figure 13, the configuration may consist of two bent magnetization magnets 10 forming a sector with a central angle of 90°, two circumferential magnetization magnets 11 with magnetic flux formed inside that is directed from the teeth 7 side towards the bent magnetization magnet 10, and two radial magnetization magnets 12 with magnetic flux formed inside that is directed from the bent magnetization magnet 10 towards the rotor 1 side. The two bent magnetization magnets 10 are magnetized so that the magnetic flux is aligned circumferentially at P1 on the surfaces of the two circumferential side ends, and so that the magnetic flux is aligned radially at the position where the two bent magnetization magnets 10 are tangent to each other, i.e., P2, and the positions of the tips on the rotor 1 side are aligned. As shown in 13D of Figure 13, the system may consist of two bent magnetized magnets 10 forming a sector shape with a central angle of 90°, and two circumferential magnetized magnets 11 with magnetic flux formed inside, directed from the teeth 7 side to the bent magnetized magnets 10, at both circumferential side ends of the bent magnetized magnets 10. The arrangement of the bent magnetized magnets 10 is the same as in 13C of Figure 13. As shown in 13E of Figure 13, the system may consist of two bent magnetized magnets 10 forming a sector shape with a central angle of 90°, and two radial magnetized magnets 12 with magnetic flux formed inside, directed from the bent magnetized magnets 10 towards the rotor 1 side. The area of ​​the circumferential center of the bent magnetized magnets 10 and on the winding 8 side will be incompletely magnetized, so it may be removed as shown in 13C to 13E of Figure 13.

[0041] Thus, by configuring the stator magnet 9 to include at least one of a circumferential magnetization magnet 11 and a radial magnetization magnet 12 on the bent magnetization magnet 10, the magnetic flux is connected in the stator magnet 9, making it less susceptible to demagnetization, and thus improving the operating point of the stator magnet 9. Furthermore, since the bent magnetization magnet 10 is expensive, the manufacturing cost of the stator magnet 9 can be reduced by replacing a portion of the stator magnet 9 with the less expensive circumferential magnetization magnet 11 or radial magnetization magnet 12.

[0042] Alternatively, as shown in Figure 14, 14A, the device may consist of a bent magnetized magnet 10 in which the magnetic flux is magnetized along the radial direction at P2 on the two circumferential side end surfaces and at P1 in the circumferential center and at P1 in the circumferential center, and two radial magnetized magnets 12 provided at the tip of the bent magnetized magnet 10 on the rotor 1 side. Alternatively, as shown in Figure 14, 14B, the device may consist of a bent magnetized magnet 10 in which the shape is a sector with a central angle of 180° protruding towards the winding 8 side, with a concave arc shape formed at the tip on the rotor 1 side, the magnetic flux is magnetized along the radial direction at P2 on the two circumferential side ends and at P1 in the circumferential center and at P1 in the circumferential center, and two radial magnetized magnets 12 provided at the tip of the bent magnetized magnet 10 on the rotor 1 side.

[0043] The radially magnetized magnet 12 may be manufactured with two poles as a single unit, or it may be separated into two poles and attached separately. Alternatively, a radially magnetized magnet may be used instead of the radially magnetized magnet 12. Furthermore, in Figures 13A to 13E and 14A and 14B of Figure 14, the direction of the magnetic flux of the circumferentially magnetized magnet 11 and the radially magnetized magnet 12 may all be reversed.

[0044] Even in this manner, a magnetic flux can be formed within the stator magnet 9 where the circumferential magnetic flux connects to the radial magnetic flux, and the leakage of magnetic flux from the stator magnet 9 to the winding 8 side can be suppressed. As a result, the stator magnet 9 is less likely to demagnetize, and the operating point of the magnet can be raised. In addition, by substituting a portion of the stator magnet 9 with at least one of the circumferentially magnetized magnet 11 and the radially magnetized magnet 12, the amount of expensive bent magnetized magnet 10 used can be reduced.

[0045] Furthermore, by configuring the stator magnet 9 with a bent magnetized magnet 10, a circumferential magnetized magnet 11, and a radial magnetized magnet 12, and by providing the circumferential magnetized magnet 11 at the circumferential side end of the bent magnetized magnet 10, and by having the circumferential magnetized magnet 11 in contact with adjacent teeth 7, the amount of expensive bent magnetized magnet used can be reduced by replacing a portion of the stator magnet 9 with at least one of the inexpensive radial magnetized magnets and circumferential magnetized magnets.

[0046] Furthermore, the stator magnet 9 comprises a bent magnetized magnet 10, a circumferential magnetized magnet 11, and a radial magnetized magnet 12. The radially magnetized magnet 12 is provided at the tip of the stator magnet 9 that faces the rotor 1 in the radial direction, and the radial magnetized magnet 12 is in contact with adjacent teeth 7. By replacing a portion of the stator magnet 9 with at least one of the inexpensive radial magnetized magnets and circumferential magnetized magnets, the amount of expensive bent magnetized magnets used can be reduced.

[0047] Furthermore, by constructing the stator magnet 9 with radially magnetized magnets 12 and multiple circumferentially magnetized magnets 11, the expensive bent magnetized magnet 10 is not used, thus reducing manufacturing costs.

[0048] Furthermore, by composing the stator magnet 9 with multiple radially magnetized magnets 12 and circumferentially magnetized magnets 11, the manufacturing cost can be reduced because the expensive bent magnetized magnet 10 is not used compared to the case where the stator magnet includes a bent magnetized magnet.

[0049] Embodiment 3. The rotating electric machine 100 according to Embodiment 3 will be described with reference to Figures 15 and 16. In Embodiments 1 and 2, examples were shown in which the stator magnet 9 is composed of a bent magnetized magnet 10, a circumferential magnetized magnet 11 and a radial magnetized magnet 12, and a combination thereof. However, in Embodiment 3, an example having magnetic pole pieces 4 on the side surface will be described. The following description will focus on the differences from Embodiments 1 and 2, and descriptions of identical or corresponding parts will be omitted as appropriate.

[0050] The stator magnet 9 of the rotating electric machine 100 according to Embodiment 3 has, for example, a magnetic pole piece 4 at at least one of the circumferential side end and the tip end on the rotor 1 side, as shown in Figure 15. For example, the stator magnet 9 consists of one bent magnetized magnet 10 and three magnetic pole pieces 4 provided at both ends and the tip of the bent magnetized magnet 10. For example, magnetic pole pieces 4 are provided at both circumferential side ends and the tip end on the rotor 1 side of the bent magnetized magnet 10, and the two magnetic pole pieces 4 provided in the circumferential direction of the bent magnetized magnet 10 are fixed in contact with the teeth 7.

[0051] The pole piece 4 has the function of guiding the circumferential magnetic flux inside the bent magnetized magnet 10 to the teeth 7. The pole piece 4 is made of a magnetic material such as a laminated steel plate made by stacking electromagnetic steel plates or a powdered iron core. The pole piece 4 can be fixed to the teeth 7 and the stator magnet 9 by magnetic force, adhesive, etc. As shown in Figure 16A, the stator magnet 9 may also consist of a bent magnetized magnet 10 and two pole pieces 4 provided at both circumferential side ends of the bent magnetized magnet 10. In Figure 16A, the magnetic flux is magnetized so that it follows the circumferential direction at the position P1 where it contacts the pole pieces 4 of the bent magnetized magnet 10, and at P2 in the circumferential center, the magnetic flux is magnetized so that it follows the radial direction. As shown in Figure 16B, the stator magnet 9 may also consist of a bent magnetized magnet 10 magnetized to form a magnetic flux similar to that in Figure 16A, and pole pieces 4 provided at the tip of the bent magnetized magnet 10 on the rotor 1 side. In the case of Figure 16B, the circumferential side ends of the bent magnetized magnet 10 and the pole pieces 4 are fixed in contact with the teeth 7. As shown in 16C of Figure 16, the bent magnetized magnet 10 may be configured such that the magnetic flux is magnetized radially at P2 at two circumferential side ends and magnetic flux is magnetized circumferentially at P1 in the circumferential center, and two magnetic pole pieces 4 are provided at the tip of the bent magnetized magnet 10 on the rotor 1 side. The magnetic pole pieces 4 are not provided at P1 at the tip of the bent magnetized magnet 10 on the rotor 1 side.

[0052] As shown in 16D of Figure 16, the stator magnet 9 may consist of a pole piece 4, circumferential magnetization magnets 11 provided at both circumferential side ends of the pole piece 4, and a radial magnetization magnet 12 provided at the rotor 1 side tip of the pole piece 4. The circumferential magnetization magnets 11 form a magnetic flux directed toward the pole piece 4, and the radial magnetization magnets 12 form a magnetic flux internally directed toward the rotor 1 side from the pole piece 4. As shown in 16E of Figure 16, the stator magnet 9 may consist of a pole piece 4 and a radial magnetization magnet 12 provided at the rotor 1 side tip of the pole piece 4. The radial magnetization magnets 12 form a magnetic flux internally directed toward the rotor 1 side from the pole piece 4. The positions of both circumferential end faces of the radial magnetization magnets 12 are different from the positions of both circumferential side ends of the pole piece 4. As shown in Figure 16, 16F, the stator 5 magnetization magnet may be configured with a magnetic pole piece 4 and magnets provided on both circumferential side ends of the magnetic pole piece 4. The circumferential magnetization magnet 11 has a magnetic flux formed inside that is directed from the circumferential teeth 7 side toward the magnetic pole piece 4. The position of the tip of the circumferential magnetization magnet 11 on the rotor 1 side is different from the position of the tip of the magnetic pole piece 4 on the rotor 1 side.

[0053] The directions of the magnetic flux of the circumferential magnetization magnet 11 and the radial magnetization magnet 12 may be completely reversed from the directions of the magnetic flux in 16A to 16F of Figure 16. By configuring the stator magnet 9 with a magnet formed inside which a magnetic flux is created in which the circumferential magnetic flux connects to the radial magnetic flux, composed of a bent magnetization magnet 10, a circumferential magnetization magnet 11, a radial magnetization magnet 12, etc., and a magnetic pole piece 4 in contact with it, the operating point of the stator magnet 9 can be improved and the eddy current loss of the stator magnet 9 can be reduced.

[0054] In this way, by configuring the stator magnet 9 to have a magnetic pole piece 4 in contact with a magnet in which a magnetic flux is formed in which the circumferential magnetic flux connects to the radial magnetic flux, within at least one of the bent magnetization magnet 10, the circumferential magnetization magnet 11, and the radial magnetization magnet 12, or any combination thereof, the magnetic flux leaking to the winding 8 can be suppressed, thereby improving the operating point of the stator magnet 9 and reducing eddy current losses in the stator magnet 9. Furthermore, by making a portion of the stator magnet 9 into a magnetic pole piece 4, the amount of magnet used can be reduced.

[0055] Embodiment 4. The rotating electric machine 100 according to Embodiment 4 will be described with reference to Figures 17 and 18. In Embodiments 1 to 3, an example was described in which the teeth 7 are straight teeth without radial irregularities, but in Embodiment 4, an example is described in which protrusions or steps 14 are formed on the teeth 7. The following description will focus on the differences from Embodiment 1, and descriptions of identical or corresponding parts will be omitted as appropriate.

[0056] The stator 5 consists of a stator core 6, a plurality of teeth 7 having circumferentially projecting protrusions 13, windings 8 wound around the teeth 7, and stator magnets 9 having recesses or protrusions corresponding to the protrusions 13. The stator magnets 9 are made of, for example, a bent magnetized magnet 10. The protrusions 13 and recesses are formed to facilitate positioning when attaching the stator magnets 9 to the stator core 6 and teeth 7. Figures 17A to 17D are cross-sectional views of a part of the stator 5, showing an example in which circumferentially projecting protrusions 13 are provided on both sides of the teeth 7 in the circumferential direction. The protrusions 13 are also positioned on the teeth 7 at locations in contact with the tip of the stator magnet 9 on the winding 8 side (17A), the tip on the rotor 1 side (17B), and the side ends between the winding 8 and the rotor 1 (17C, 17D). In Figures 17A, 17B, and 17C, the projection 13 allows the convex tip of the winding 8 side of the stator magnet 9 to fit into the area where the spacing between the teeth 7 is narrowed, thereby positioning the stator magnet 9. In Figure 17D, a recess corresponding to the projection 13 is formed on the surface of the stator magnet 9 that contacts the teeth 7, and the stator magnet 9 is positioned by the recess fitting into the projection 13. In this way, by forming a projection 13 that protrudes circumferentially on the teeth 7, the positioning of the stator magnet 9 can be easily facilitated.

[0057] Furthermore, as shown in Figure 18, the stator 5 may consist of a stator core 6, a plurality of teeth 7 having a step 14 where the circumferential width on the rotor 1 side is narrower than on the stator core 6 side, a winding 8 wound around the teeth 7, and a stator magnet 9 having a protrusion corresponding to the step 14 of the teeth 7. The stator magnet 9 is composed of, for example, a bent magnetized magnet 10. As shown in Figure 18, since the teeth 7 have a step 14 where the width is narrower on the rotor 1 side, the spacing between the teeth 7 on the winding 8 side is narrower than the spacing between the teeth 7 on the rotor 1 side. The stator magnet 9 is positioned by fitting the protrusion of the stator magnet 9 into the narrowed space between the teeth 7. In this way, by providing the teeth 7 with a circumferential projection 13, the positioning of the stator magnet 9 can be made easier.

[0058] Furthermore, since the stator magnet 9 is composed of a stator core 6, a plurality of teeth 7 having circumferentially protruding projections 13, a winding 8 wound around the teeth 7, and recesses or protrusions corresponding to the projections 13, the positioning of the stator magnet 9 when attaching it to the stator 5 can be easily facilitated.

[0059] Furthermore, the stator 5 is composed of a stator core 6, a plurality of teeth 7 having a step 14 on the rotor 1 side which is narrower than the stator core 6 side, a winding 8 wound around the teeth 7, and a stator magnet 9 having a protrusion corresponding to the step 14 of the teeth 7. This makes it easy to position the stator magnet 9 when attaching it to the stator 5.

[0060] Embodiment 5. The rotating electric machine 100 according to Embodiment 5 will be described using Figures 19 to 21. While Embodiments 1 to 4 described examples in which circumferential and radial magnetic fluxes are formed inside the stator magnet 9, Embodiment 5 describes an example in which circumferential and radial magnetic fluxes are formed inside the rotor magnet 3. The following description will focus on the differences from Embodiment 1, and descriptions of identical or corresponding parts will be omitted as appropriate.

[0061] The rotating electric machine 100 consists of a stator 5 and a rotating body 15. Figure 19 is a schematic axial cross-section of the rotating electric machine 100. As shown in Figure 19, the stator 5 consists of a stator core 6, teeth 7, and windings 8 wound around the teeth 7. The rotating body 15 consists of a rotor shaft 16, a rotor core 2, and rotor magnets 3 provided on the outer circumferential surface of the rotor core 2 on the stator 5 side, and is arranged coaxially with the stator 5 with an air gap between them. Figure 20 is a schematic axial cross-section of a part of the rotating body 15, simplified by correcting the curvature to a plane. As shown in Figure 20, the rotor magnets 3 consist of a bent magnetized magnet 10 having polar anisotropy in which the easy magnetization axis is bent internally to prevent magnetic flux leakage to the rotor core 2 side, and a magnetic pole piece 4 provided in contact with the bent magnetized magnet 10 in the circumferential direction. By pressing the circumferential side surface of the rotor magnet 3 against the magnetic pole piece 4, the circumferential positioning of the bent magnetized magnet 10 becomes easier. The rotor core 2 and magnetic pole piece 4 are magnetic materials such as laminated steel sheets made by stacking electromagnetic steel sheets such as silicon steel, or compacted iron cores. The rotating electric machine 100 is exemplified as an inner rotor type in which the rotating body 15 is located inside the stator 5, but an outer rotor type in which the rotating body 15 is located outside the stator 5 may also be used.

[0062] The rotor magnet 3 may be arranged circumferentially with the pole piece 4 sandwiched between bent magnetized magnets 10 having magnetic flux in the same direction, as shown in Figure 20, or it may be arranged circumferentially with the pole piece 4 sandwiched between bent magnetized magnets 10 having magnetic flux in different directions, as shown in Figure 21. Furthermore, when bent magnetized magnets 10 having magnetic flux in different directions are arranged circumferentially, they may be arranged alternately, or they may be arranged every few units. From 20A in Figure 20, when bent magnetized magnets 10 having magnetic flux in the same direction are arranged on both sides of the pole piece 4 in the circumferential direction, the pole piece 4 is magnetized to the opposite polarity to the bent magnetized magnets 10, so the rotating body 15 has a so-called consequent pole structure.

[0063] As shown in 20B of Figure 20, the circumferential corners of the bent magnetized magnet 10 and the pole piece 4 on the stator 5 side may be recessed, or as shown in 20A of Figure 20, the circumferential corners of the bent magnetized magnet 10 and the pole piece 4 may not be recessed. Figure 21 is a diagram showing a simplified axial cross-section of a part of the rotating body 15, corrected to a plane for curvature. From Figure 21, when bent magnetized magnets 10 with magnetic fluxes in different directions are arranged on both sides in the circumferential direction, the pole piece 4 connects the circumferential magnetic flux generated from one of the two contacting bent magnetized magnets 10 to the other bent magnetized magnet 10 in order to prevent magnetic flux leakage to the rotor core 2, thereby improving the operating point of the bent magnetized magnet 10. Also, as shown in 21B of Figure 21, the end faces of the bent magnetized magnet 10 and the rotor 1 pole piece 4 on the stator 5 side do not have to be aligned, or as shown in 21A of Figure 21, the end faces may be aligned.

[0064] Furthermore, since the operating point of the bent magnetized magnet 10 is improved by the magnetic pole piece 4, the rotor core 2 may be made of a magnetic material. By making the rotor core 2 a magnetic material, the rotor core 2 and the rotor 1 magnetic pole piece 4 can be integrated. Alternatively, the rotor core 2 may be made of a non-magnetic material such as resin or aluminum. By making the rotor core 2 a non-magnetic material, the magnetic flux generated in the rotor shaft 16 can be reduced, and therefore the axial voltage generated in the axial direction of the rotor shaft 16 by this magnetic flux can be reduced.

[0065] Thus, the rotor magnet 3 is configured to have a bent magnetized magnet 10 having polar anisotropy, in which the easy magnetization axis is bent internally to prevent magnetic flux leakage to the rotor core 2, thereby creating a magnetic flux in which the circumferential magnetic flux is connected to the radial magnetic flux, and a magnetic pole piece 4 provided in contact with the bent magnetized magnet 10 in the circumferential direction. This configuration makes it possible to raise the operating point of the stator magnet 9 provided on the rotating body 15.

[0066] By constructing the rotor core 2 from a non-magnetic material, the axial voltage generated in the axial direction of the rotor shaft 16 can be reduced.

[0067] The rotor 1 only needs to have at least one rotating body located inside or outside the stator 5, but the configurations of the stator magnets 9 or rotor magnets 3 shown in Embodiments 1 to 5 can also be applied to the magnetic geared rotating electric machine 101. The magnetic geared rotating electric machine 101 has a structure in which a high-speed rotor 18, a low-speed rotor 17, and a stator 5 are assembled in order from the inner diameter side to the outer diameter side. Figure 22 is a schematic cross-section in the axial direction of the magnetic geared motor. The magnetic geared motor consists of a high-speed rotor 18, a low-speed rotor 17 located outside the high-speed rotor 18, and a stator 5 located outside the low-speed rotor 17. The rotor 1 consists of a rotor core 2 and rotor magnets 3 and magnetic pole pieces 4 arranged side by side on the surface of the rotor core 2 on the stator 5 side. The stator 5 consists of a stator core 6, teeth 7 protruding from the stator core 6 toward the rotor 1, a stator magnet 9 sandwiched between the teeth 7 on the rotor 1 side, and a winding 8 wound around the teeth 7. The stator magnet 9 has the configuration described in Embodiment 1. The high-speed rotor 18, the low-speed rotor 17, and the stator 5 are arranged coaxially with an air gap between them. Furthermore, although a cylindrical rotary electric machine 101 is shown in Figure 22, other types such as a disc rotary type, a flat plate linear type, or a cylindrical linear type may also be used. In addition, the arrangement of the teeth 7 of the stator 5 and the stator magnets 9 can also be applied to magnetic gear devices that do not have windings 8 for the electric motor.

[0068] In this way, by configuring the rotor 1 with a low-speed rotor 17 and a high-speed rotor 18, and by providing the stator 5 with multiple stator magnets 9 in which circumferential magnetic flux is connected to radial magnetic flux, the output of the magnetic geared rotating electric machine 101 can be increased.

[0069] Furthermore, the configurations of the stator magnet 9 or rotor magnet 3 described in Embodiments 1 to 4 are also applicable to the linear motor 102. The linear motor 102 comprises a stator 5 and a movable element 20. As shown in Figure 23, the stator 5 is composed of a stator core 6 and teeth 7. The stator 5 comprises a stator core 6 and stator teeth 19 protruding from the stator core 6. The movable element 20 is composed of a movable core 21, a plurality of movable teeth 22 protruding from the movable core 21 toward the stator 5, windings 8 wound around each movable tooth 22, and movable magnets 23 arranged between the movable teeth 22, and is positioned with an air gap between it and the stator 5. The movable magnets 23 are composed of a bent magnetized magnet 10 having polar anisotropy, in which the easy magnetization axis is bent internally to prevent magnetic flux leakage toward the windings 8, and a magnetic flux is formed in which the magnetic flux in the direction of operation is connected to the magnetic flux in the direction of the windings 8. The operating direction is shown in both the direction of the X-axis and the opposite direction of the X-axis in Figure 23. The winding 8 direction is the direction perpendicular to the stator 5 side or winding 8 side surface of the movable magnet 23. By connecting the operating direction magnetic flux to the winding 8 direction magnetic flux inside the movable magnet 23, the operating point of the movable magnet 23 can be improved. The movable magnet 23 according to Embodiment 3 may be configured by combining the bent magnetization magnet 10, the circumferential magnetization magnet 11, the radial magnetization magnet 12 and the magnetic pole piece 4, as shown in Embodiment 1.

[0070] Thus, by providing the movable element 20 with a movable element magnet 23 in which the magnetic flux in the direction of operation is connected to the magnetic flux in the eight directions of the winding, the operating point of the movable element magnet 23 is improved, and the output of the linear motor 102 is improved.

[0071] While this disclosure describes various exemplary embodiments, the various features, aspects, and functions described in one or more embodiments are not limited to the application of a particular embodiment, but are applicable individually or in various combinations to the embodiments. Therefore, countless variations not illustrated are conceivable within the scope of the art disclosed herein. These include, for example, modifying, adding, or omitting at least one component, or even extracting at least one component and combining it with components from other embodiments.

[0072] The various aspects of this disclosure are summarized below as an appendix. (Note 1) Rotor and The stator comprises a rotor with an air gap between them, a plurality of teeth protruding from the stator core toward the rotor, windings wound around each of the teeth, and stator magnets arranged between adjacent teeth and provided on the rotor side of the windings, The stator magnet is a rotating electric machine in which a circumferential magnetic flux directed in the circumferential direction and a radial magnetic flux directed toward the rotor are formed within the stator magnet.

[0073] (Note 2) The rotating electric machine as described in Appendix 1, wherein the stator magnet is a bent magnetized magnet that bends from the teeth side toward the gap between it and the rotor, thereby connecting the magnetic flux.

[0074] (Note 3) The rotating electric machine according to Appendix 1 or 2, wherein the stator magnet comprises at least one of a circumferential magnetizing magnet that increases the magnetic flux density in the circumferential direction and a radial magnetizing magnet that increases the magnetic flux density in the radial direction.

[0075] (Note 4) The rotating electric machine according to any one of the appendices 1 to 3, wherein the circumferential side end of the stator magnet is provided with the circumferential magnetization magnet, and the circumferential magnetization magnet is in contact with adjacent teeth.

[0076] (Note 5) The rotating electric machine according to any one of the appendices 1 to 4, wherein the tip of the stator magnet on the rotor side in the radial direction is provided with the radial magnetization magnet, and the radial magnetization magnet is in contact with adjacent teeth.

[0077] (Note 6) The stator magnet is a rotating electric machine according to any one of the appendices 1 to 4, comprising a circumferential magnetized magnet from adjacent teeth on both sides toward the center between the teeth, and a radial magnetized magnet that contacts the circumferential magnetized magnet on the rotor side.

[0078] (Note 7) The stator magnet is a rotating electric machine according to any one of the appendices 1 to 4, comprising a circumferential magnet and a plurality of radial magnets flanking the circumferential magnet.

[0079] (Note 8) The stator magnet has a magnetic pole piece at at least one of the circumferential side end and the rotor-side tip, as described in any one of the items 1 to 7 of the Rotating Electric Machine.

[0080] (Note 9) The teeth have protrusions that extend in the circumferential direction, The rotating electric machine according to any one of the appendices 1 to 8, wherein the stator magnet is provided with a recess corresponding to the projection, and the projection of the teeth and the recess of the stator magnet are in contact.

[0081] (Note 10) The aforementioned teeth have a step that narrows in width on the rotor side, The stator magnet is positioned in contact with the step, and the rotating electric machine is as described in any one of the appendices 1 to 8.

[0082] (Note 11) The rotor is a rotating electric machine according to any one of the appendices 1 to 10, comprising a low-speed rotor provided on the stator side with the air gap between them, and a high-speed rotor on the side of the low-speed rotor opposite to the stator.

[0083] (Note 12) Stator and, The rotor is disposed with an air gap between it and the stator and has a rotor core and a plurality of rotor magnets and magnetic pole pieces in contact with the rotor core, with each rotor having a rotating body adjacent to the other. The rotor magnet is a rotating electric machine in which a circumferential magnetic flux directed in the circumferential direction and a radial magnetic flux directed toward the stator are formed within the rotor magnet.

[0084] (Note 13) The rotating electric machine as described in Appendix 12, wherein the rotor core is made of a non-magnetic material.

[0085] (Note 14) Stator and, The movable element comprises a plurality of movable teeth positioned with a gap between the stator and the movable element core, each of the movable element teeth being wound with a winding, and a movable element magnet positioned between adjacent movable elements and provided on the stator side of the winding, The movable magnet is a linear motor in which a magnetic flux in the direction of movement toward the direction of movement and a magnetic flux in the winding direction toward the stator are formed within the movable magnet. [Explanation of symbols]

[0086] 1 Rotor, 2 Rotor core, 3 Rotor magnet, 4 Magnetic pole piece, 5 Stator, 6 Stator core, 7 Teeth, 8 Winding, 9 Stator magnet, 10 Bent magnetized magnet, 11 Circumferential magnetized magnet, 12 Radial magnetized magnet, 13 Projection, 14 Step, 15 Rotating body, 16 Rotor shaft, 17 Low-speed rotor, 18 High-speed rotor, 19 Stator teeth, 20 Movement, 21 Movement core, 22 Movement teeth, 23 Movement magnet, 100 Rotating electric machine, 101 Magnetic geared rotating electric machine, 102 Linear motor

Claims

1. Rotor and The stator comprises a rotor separated by an air gap, a plurality of teeth protruding from the stator core toward the rotor, windings wound around each of the teeth, and stator magnets arranged between adjacent teeth and provided on the rotor side of the windings, The stator magnet is a rotating electric machine in which a circumferential magnetic flux directed in the circumferential direction and a radial magnetic flux directed toward the rotor are formed within the stator magnet.

2. The rotating electric machine according to claim 1, wherein the stator magnet is a bent magnetized magnet that bends from the teeth side toward the gap between it and the rotor so that the magnetic flux is connected.

3. The rotating electric machine according to claim 1 or claim 2, wherein the stator magnet comprises at least one of a circumferential magnetizing magnet that increases the magnetic flux density in the circumferential direction and a radial magnetizing magnet that increases the magnetic flux density in the radial direction.

4. The rotating electric machine according to claim 3, wherein the circumferential side end of the stator magnet is provided with the circumferential magnetization magnet, and the circumferential magnetization magnet is in contact with adjacent teeth.

5. The rotating electric machine according to claim 3, wherein the tip of the stator magnet on the rotor side in the radial direction is provided with the radial magnetization magnet, and the radial magnetization magnet is in contact with adjacent teeth.

6. The rotating electric machine according to claim 3, wherein the stator magnet is composed of a circumferentially magnetized magnet from adjacent teeth on both sides toward the center between the teeth, and a radially magnetized magnet that contacts the circumferentially magnetized magnet on the rotor side.

7. The rotating electric machine according to claim 3, wherein the stator magnet is composed of the circumferential magnetization magnet and a plurality of radial magnetization magnets flanking the circumferential magnetization magnet.

8. The rotating electric machine according to claim 1, wherein the stator magnet has a magnetic pole piece at at least one of the circumferential side end and the rotor-side tip.

9. The teeth have protrusions that extend in the circumferential direction, The rotating electric machine according to claim 1, wherein the stator magnet is provided with a recess corresponding to the projection, and the projection of the teeth and the recess of the stator magnet are in contact.

10. The aforementioned teeth have a step that narrows in width on the rotor side, The rotating electric machine according to claim 1, wherein the stator magnet is arranged in contact with the step.

11. The rotating electric machine according to claim 1, wherein the rotor comprises a low-speed rotor provided on the stator side with the air gap between them, and a high-speed rotor on the side of the low-speed rotor opposite to the stator.

12. Stator and, Displaced with respect to the stator via an air gap, the rotating body comprises a rotor core and rotor magnets and pole pieces adjacent to each other and in contact with the rotor core, The rotor magnet is a rotating electric machine in which a circumferential magnetic flux directed in the circumferential direction and a radial magnetic flux directed toward the stator are formed within the rotor magnet.

13. The rotating electric machine according to claim 12, wherein the rotor core is made of a non-magnetic material.

14. Stator and, The movable element comprises a plurality of movable teeth positioned with a gap between the stator and the movable element core, each of the movable element teeth being wound with a winding, and a movable element magnet positioned between adjacent movable elements and provided on the stator side of the winding, The movable magnet is a linear motor in which a magnetic flux in the direction of movement toward the direction of movement and a magnetic flux in the winding direction toward the stator are formed within the movable magnet.

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