Rotating electric machine

Abstract

Rotating electric machine (1) with a central longitudinal axis (1C), comprising: a stator (100) comprising armature coils (104) wherein the armature coils (104) are configured to generate magnetic flux when excited; a rotor (300) rotatable about the central longitudinal axis (1C), wherein the rotor (300) comprises a plurality of salient poles (302) and coils (330) wound around the rotor (300) and with which the magnetic flux couples; and insulators (340) around which the coils (330) are wound, which are installed on the plurality of salient poles (302), characterized by the fact that Each of the insulators (340) has a first height difference (345A) which forms torus grooves (347) around the central longitudinal axis (1C) when the insulators (340) are installed on the plurality of leg poles (302) and wherein the insulators (302) are fastened by means of retaining rings (312, 314) which have second height differences (312A, 314A) which are inserted into the first height differences (345A).

Description

[Technical field]

[0001] The present invention relates to a rotating electric machine with a central longitudinal axis comprising a rotor having coils to which a magnetic flux from a stator couples, which are wound around a plurality of rotor teeth or salient poles arranged radially around the central longitudinal axis, such that the rotor teeth or salient pole are spaced apart from each other along an arc length of a circle around the central longitudinal axis. [General state of the art]

[0002] A rotating electric machine, comprising a stator and a rotor, is used as a rotating electric machine for installation in hybrid electric vehicles. The stator includes armature coils. The armature coils are configured to generate magnetic flux when energized. The rotor comprises a variety of salient poles and coils with which the magnetic flux couples.

[0003] WO 2012 / 011168 A1 discloses a rotating electric machine. This known rotating electric machine uses a coil mounting method called the cassette coil method, in which insulators, each of which has an armature coil, are attached to teeth of a stator by inserting each insulator onto one of the teeth. [State of the art]

[0004] From US patent 2015 / 0155753A1, a rotor for a rotating electrical device is known. The rotor comprises a rotor core having salient poles at several positions along the circumference of the rotor core, a rotor coil wound on each of the salient poles, a retaining element made of a non-magnetic material, and an external magnetic element located near one end of the rotor in the circumferential direction to reduce magnetic reluctance in a gap section between the rotor and a stator and to reduce losses in cases where magnetic flux saturation does not occur in the salient poles of the rotor. [Brief description of the invention][Technical problem]

[0005] If the coil installation method used by the known rotating electrical machine described in WO 2012 / 011 168 A1 is used to install coils on a rotor, there is a possibility that coils may come loose due to centrifugal force during rotation of the rotor.

[0006] It is therefore an object of the present invention to provide a rotating electrical machine which is able to prevent insulators from coming loose due to centrifugal force during the rotation of a rotor. [Solution to the problem]

[0007] According to one aspect of the present invention, a rotating electrical machine with a central longitudinal axis is provided, comprising: a stator comprising armature coils, the armature coils being configured to generate magnetic flux when excited; a rotor rotatable about the central longitudinal axis, the rotor comprising a plurality of salient poles and coils wound around the rotor with which the magnetic flux couples; and insulators around which the coils are wound, installed at the plurality of salient poles, each of the insulators having a first height difference forming torus grooves around the central longitudinal axis when the insulators are installed at the plurality of salient poles, and the insulators being secured by means of retaining rings having second height differences inserted into the first height differences. [Advantageous effects of the invention]

[0008] According to the present invention, the insulators are prevented from coming loose due to centrifugal force during the rotation of the rotor. [Brief description of the drawings] Fig. Figure 1 is a cross-section of one half (1 / 2) of a rotating electrical machine according to an embodiment of the present invention. Fig. Figure 2 shows rectifier circuits, each of which is a closed circuit comprising diodes arranged in an inner rotor. Fig. Figure 3 is a cross-section of the rotating electric machine, cut through a central longitudinal axis of the machine. Fig. Figure 4 is an exploded view of an outer rotor of the rotating electric machine. Fig. Figure 5 is an exploded view of an inner rotor of the rotating electric machine. Fig. Figure 6 is an axial end view, shown in the Fig. Figure 5 illustrates the inner rotor from the left with unnecessary parts or elements removed to show how insulators are attached or installed on the rotor teeth. Fig. Figure 7 is a perspective view of an insulator with rotor windings wrapped around it. Fig. Figure 8 is a perspective view of the insulator without rotor windings. Fig. Figure 9 is a partial cross-section of the inner rotor. Fig. 10 is a partially enlarged view of the Fig. Figure 8 shows an insulator-holding part and a concave section of the insulator. Fig. Figure 11 is a perspective view showing a spacer and a convex section. Fig. Figure 12 is a partially axial section of the inner rotor with attached insulators. [Description of embodiments]

[0009] With reference to the accompanying drawings, the present invention is described in detail below. Fig. Figures 1 to 12 show a rotating electric machine.

[0010] In Fig. The rotating electric machine 1 is configured as a double-rotor type machine with a central longitudinal axis 1C. The rotating electric machine 1 comprises a stator 100, which is approximately cylindrical, an outer or second rotor 200, which is arranged radially inside the stator 100 relative to the central longitudinal axis 1C, and an inner or first rotor 300, which is arranged radially from the outer rotor 200 relative to the central longitudinal axis 1C. The outer rotor 200 and the inner rotor 300 are mounted such that the outer and inner rotors 200 and 300 are relatively rotatable about the central longitudinal axis 1C. Fig. Figure 1 shows a radial half (1 / 2) of a cross-sectional view of the rotating electrical machine, i.e. a radial displacement of 180° mechanical angle of 360° mechanical angle.

[0011] The stator 100 comprises a stator core 101. The stator core 101 includes a stator base and a plurality of stator teeth 102. The stator teeth 102 extend radially (relative to the central longitudinal axis 1C) inwards from the stator base. As shown from Fig. As can be seen in Figure 1, the stator teeth 101 are arranged radially around the central longitudinal axis 1C such that the stator teeth 102 are spaced apart from each other along an arc length around a circle around the central longitudinal axis 1C. The stator teeth 102 extend to inner ends or inner circumferential surfaces 102a such that the inner circumferential surfaces 102a face the outer circumferential surfaces 201a of magnetic path components 201 of the outer rotor 200, which will be described later, across an air gap G1.

[0012] The stator 100 contains armature coils 104, which can be divided into W-phase coils, V-phase coils, and U-phase coils for a three-phase alternating current. The armature coils 104 are inserted into slots 103, each of which is defined between two opposing sides 102b of two adjacent stator teeth 102. The armature coils 104 are wound around the stator teeth 102 with distributed winding. The armature coils 104 generate magnetic flux when energized.

[0013] In the stator 100, the supply of three-phase alternating current to these armature coils 104 causes the generation of a rotating magnetic field. The generated rotating magnetic field penetrates the outer rotor 200 and the inner rotor 300, causing them to rotate relative to the stator 100.

[0014] The outer rotor 200 comprises a magnetic path component 201 and a variety of non-magnetic elements 202. The magnetic path component 201 is made of a soft magnetic material with high permeability, such as steel. Each of the non-magnetic elements 201 is made of a non-magnetic material that does not allow the flow of magnetic flux, such as polyphenylene sulfide (PPS) resin or the like. The magnetic path component 201 extends along the central longitudinal axis 1C. Each of the non-magnetic elements 202 extends along the central longitudinal axis 1C. It should be noted that the central longitudinal axis is an axis of rotation about which the outer and inner rotors 200 and 300 rotate relative to the stator 100.

[0015] The magnetic path component 201 comprises a plurality of pole shoe segments 201A and a plurality of bridge segments 201B. The pole shoe segments 201A are arranged radially around the central longitudinal axis 1C such that they are spaced apart from one another along an arc length of a circle around the central longitudinal axis 1C. Each of the non-magnetic elements 202 is positioned between two adjacent pole shoe segments 201A such that each pole shoe segment 201A faces the adjacent non-magnetic element 201. Each of the bridge segments 201B is positioned between two adjacent pole shoe segments 201A and connects them at radially outer (relative to the central longitudinal axis 1C) and inner positions of the non-magnetic element 202 positioned between the two pole shoe segments 201A.

[0016] The pole shoe segments 201A and the bridge segments 201B are formed in one piece such that the magnetic path component 201 is formed as a one-piece core, of which the pole shoe segments 201A and the bridge segments 201B are one-piece parts. The magnetic path component 201 is formed as the one-piece core by laminating a plurality of electromagnetic steel plates one after the other along the central longitudinal axis 1C.

[0017] Each of the non-magnetic elements 202 is in a space defined and surrounded by the two adjacent pole shoe segments 201A and one of the bridge segments 201B. In the illustrated outer rotor 200, the pole shoe segments 201A are made of soft magnetic material, and the non-magnetic elements 202 are arranged radially around the central longitudinal axis 1C such that the pole shoe segments 201A are spaced apart from each other along the arc length of the circle around the central longitudinal axis 1C, and each of the non-magnetic elements 202 is positioned between two adjacent pole shoe segments 201A. The magnetic path component 201 and the non-magnetic elements 202 are described in detail later.

[0018] The outer rotor 200 is arranged such that an outer circumferential surface 201a of the magnetic path component 201 is opposite the inner circumferential surfaces (inner ends) 102a of the stator teeth of the stator 100 and that an outer circumferential surface 201b of the magnetic path component 201 is opposite the outer circumferential surfaces (outer ends) 302a of the rotor teeth 302 of an inner rotor 300 described later.

[0019] The armature coils 104 of the stator 100 generate a magnetic flux that enters the outer rotor 200. The magnetic flux entering the outer rotor 200 flows efficiently through the pole shoe segments 201A, but the non-magnetic elements 202 prevent the flow of the magnetic flux. After passing through the pole shoe segments 201A, the magnetic flux enters the rotor teeth 302 of the inner rotor 300 from the outer circumferential surfaces 302a and, on its return to the stator 100, flows once again through the pole shoe segments 201A to complete a magnetic circuit.

[0020] During the rotation of the outer rotor 200 relative to the stator 110, a magnetic circuit alternately selects a first path in which each of the pole shoe segments 201A of the magnetic path component 201 allows the flow of the magnetic flux, and a second path in which the adjacent of the non-magnetic elements 202 restricts the flow of the magnetic flux.

[0021] By rotating the outer rotor 200 in this way, it is possible to change the number of poles and the frequency of the rotating magnetic field generated by the armature coils 104. A torque is generated during the synchronous rotation of the thus modulated rotating magnetic field and the inner rotor 300.

[0022] The inner rotor 300 comprises a rotor core 301, which is formed by laminating electromagnetic steel plates along the central longitudinal axis 1C. The rotor core 301 includes a rotor base and a plurality of rotor teeth (salient poles) 302. The rotor teeth 302 extend radially (relative to the central longitudinal axis 1C) outwards from the rotor base. As shown in the figure Fig. As can be seen in Figure 1, the rotor teeth 302 are arranged radially around the central longitudinal axis 1C, such that the rotor teeth 302 are spaced apart from each other along an arc length of a circle around the central longitudinal axis 1C. The rotor teeth 302 extend to outer ends or outer circumferential surfaces 302a of the rotor teeth 302, such that the outer circumferential surfaces 302a are opposite an inner circumferential surface 201b of the magnetic path component 201 of the outer rotor 200 across an air gap G2.

[0023] The rotor teeth 302 each have sets of rotor windings 330. The rotor windings 330 of each set serve as an induction coil I and an excitation coil F. The induction coil I and the excitation coil F are wound around each of the rotor teeth 302 by using slots as grooves 303, each of which is defined between opposite sides 302b of the adjacent rotor teeth 302, such that the induction coil I is arranged radially inward from and close to the outer end 302a of the rotor tooth 302, and the excitation coil F is arranged radially inward from the outer end 302a of the rotor tooth 302 and further recessed than the induction coil I. In other words, the induction coils I are located on the side close to the outer rotor 200, while the excitation coils F are located on the side close to the central longitudinal axis 1C.Furthermore, the induction coils I and the excitation coils F are inserted into the slots 303 and wound around the inner rotor 300 such that the induction coils I are arranged radially (relative to the central longitudinal axis 1C) outwards and that the excitation coils F are arranged radially inwards.

[0024] The induction coils I are wound around the two adjacent rotor teeth 302 with concentrated winding in opposite directions. The induction coils I are arranged radially around the central longitudinal axis 1C such that the induction coils I are spaced apart from each other along the arc length of the circle around the central longitudinal axis 1C. Each of the induction coils 34 generates (or induces) an induced current when the flux density of the magnetic flux coupled to it changes.

[0025] The excitation coils F are wound around the two adjacent rotor teeth 302 with concentrated winding in opposite directions. The excitation coils F are arranged radially around the central longitudinal axis 1C such that they are spaced apart from each other along the arc length of the circle around the central longitudinal axis 1C. Each excitation coil F acts as an electromagnet when energized by the application of the excitation current. As described, the induction coil I and the excitation coil F are wound around each of the rotor teeth 302 such that the direction of the current flowing through the induction coil I coincides with the direction of the current flowing through the excitation coil F.

[0026] In Fig. Figure 1 shows only half of the inner rotor 300. Therefore, only eight (8) induction coils I and only eight (8) excitation coils F are shown. The eight induction coils I are named I1, I2, I3, I4, I5, I6, I7, and I8 in that order along one direction of rotation of the inner rotor 300, i.e., a counterclockwise direction, to avoid confusion. The eight excitation coils F are named F1, F2, F3, F4, F5, F6, F7, and F8 in that order along the direction of rotation of the inner rotor 300 to avoid confusion. As can be seen from the foregoing description, the inner rotor 300 carries 16 (16) induction coils I and 16 (16) excitation coils F. The remaining eight induction coils I, which are shown in Figure 1, are shown in Figure 2. Fig. Since I10, I11, I12, I13, I14, I15 and I16 are not shown, they can be named I9, I10, I11, I12, I13, I14, I15 and I16 in that order along the direction of rotation of the inner rotor 300. The remaining eight excitation coils I, which are not shown in Fig. As shown in Figure 1, F9, F10, F11, F12, F13, F14, F15 and F16 can be named in this order along the direction of rotation of the inner rotor 300.

[0027] The sixteen (16) induction coils I on the inner rotor 300 are divisible into an odd group, such as I1, I3, I5, I7, I9, I11, I13, and I15, and an even group, such as I2, I4, I6, I8, I11, I12, I14, and I16. The odd group is further divisible into a first subgroup, such as induction coils I1, I5, I9, and I13, and a second subgroup, such as induction coils I3, I7, I11, and I15. The first subgroup of the odd group is given by selecting every second odd induction coil, such as I1, I5, I9, and I13, and the second subgroup of the odd group is given by selecting the remaining every second odd induction coil, such as I3, I7, I11, and I15. The even group can further be divided into a first subgroup, such as the induction coils I2, I6, I10 and I14, and into a second subgroup, such as the induction coils I4, I8, I12 and I16.The first subgroup of the even group is given by selecting every second even induction coil, such as I2, I6, I10 and I14, and the second subgroup of the even group is given by selecting the remaining every second even induction coil, such as I4, I8, I12 and I16.

[0028] As from Fig. As can be seen in Figure 2, the induction coils, such as I1 and I5, of the first subgroup of the odd group, and the induction coils, such as I3 and I7, of the second subgroup of the odd group, and some of the excitation coils F, together with diodes D1 and D2, form a rectifier circuit C1, which is configured as a closed circuit. In this rectifier circuit C1, the induction coils, such as I1 and I5, of the first subgroup of the odd group, and diode D1 are connected in series, and the induction coils, such as I3 and I7, of the second subgroup of the odd group, are connected in series around diode D2.One series connection of the induction coils, such as I1 and I5, of the first subgroup of the odd-numbered group, to diode D1, and the other series connection of the induction coils, such as I3 and I7, of the second subgroup of the odd-numbered group, to diode D2, are connected in parallel, so that the cathode sides of diodes D1 and D2 are connected to a series connection of the excitation coils, such as F1 and F3, which together form part of all excitation coils F. As described above, in the rectifier circuit C1, the induction alternating current generated by each of the induction coils of the odd-numbered group is rectified by the associated diodes D1 and D2 to provide a supply of direct current to the associated excitation coils F.

[0029] Further referring to Fig. 2. The induction coils, such as I2 and I6, of the first subgroup of the even group, and the induction coils, such as I4 and I8, of the second subgroup of the even group, and the remaining portion of all excitation coils F, together with diodes D3 and D4, form a rectifier circuit C2, which is configured as a closed circuit. In this rectifier circuit C2, the induction coils, such as I2 and I6, of the first subgroup of the even group, and diode D3 are connected in series, and the induction coils, such as I4 and I8, of the second subgroup of the even group, and diode D4 are also connected in series.One series connection of the induction coils, such as I2 and I6, of the first subgroup of the even group, to diode D3, and the other series connection of the induction coils, such as I4 and I8, of the second subgroup of the even group, to diode D4, are connected in parallel, so that the cathode sides of diodes D3 and D4 are connected to a series connection of the excitation coils, such as F6 and F8, which form the remaining part of all excitation coils F. As described above, in the rectifier circuit C2, the induction alternating current generated by each of the induction coils of the even group is rectified by the associated diodes D3 and D4 to provide a supply of excitation direct current to the associated excitation coils F.

[0030] Because the induced current generated by the induction coils I is rectified and used as excitation current to rectify the excitation coils F, the circuit setup described above causes the rotor teeth 302 to operate as electromagnets.

[0031] According to this circuit configuration with respect to diodes D1, D2, D3, and D4, the number of diodes required is limited by the use of such series connections, even if an increase in the number of poles is needed by increasing the number of induction coils I and excitation coils F. To avoid using a large number of diodes, the circuit configuration forms a star-terminal half-wave rectifier circuit to provide an output current by performing half-wave rectification after converting one of the supplied induction currents, instead of using the widely used full-wave rectifier circuit of the H-bridge type.

[0032] The excitation coils F of the rectifier circuits C1 and C2 are wound around the two adjacent rotor teeth 302 in opposite winding directions. One of the two adjacent rotor teeth 302, which forms part of a magnetic circuit, is magnetized such that it acts as an electromagnet whose S-pole is opposite the outer rotor 200 in order to induce a magnetic flux from the adjacent pole shoe segment 201A of the outer rotor 20. Furthermore, the other of the two adjacent rotor teeth 302 is magnetized such that it acts as an electromagnet whose N-pole is opposite the outer rotor 20 in order to induce a magnetic flux to the outer rotor 200.

[0033] The principle of torque generation in the rotating electric machine 1 is now described. Among the magnetic flux components that come out of the stator 100, flow through the outer rotor 200 to couple with the inner rotor 300, at least one component, modulated by the rotation of the outer rotor 200, is synchronized with the rotation of the inner rotor 300 and couples with the inner rotor 300.

[0034] On the other hand, the magnetic flux coupled to the induction coils I of the inner rotor 300 contains at least one component that varies without being modulated by the rotation of the outer rotor 200 (i.e., without being synchronized with the rotation of the inner rotor 300). This component causes the induction coils I to generate an induced alternating current. The induced current is rectified by the diodes D1, D2, D3, and D4 to provide excitation current to energize the excitation coils F, causing the rotor teeth 302 to act as electromagnets to generate excitation magnetic flux. This results in the production of torque within the rotating electric machine 1.

[0035] It is noted that the supply of current from an alternating current source to the armature coils 104, which are wound with distributed winding, causes the generation of magnetic flux, which comes out of the stator teeth 102 of the stator 100, flows through the pole shoe segments 201A of the outer rotor 200 and couples with the rotor teeth 302 of the inner rotor 300.

[0036] Although the armature coils 104 can be wound with concentrated winding, in the present embodiment they are wound with distributed winding. In the case of concentrated winding, the armature coils can superimpose more harmonic components onto the fundamental frequency than the armature coils wound with distributed winding can. Because the harmonic component of the magnetic flux superimposed on the fundamental frequency acts as a change in the amount of magnetic flux, the armature coils 104 wound with concentrated winding cause the induction coils I to generate induced current efficiently, thereby resulting in a larger amount of excitation current to be supplied to the excitation coils I to generate a magnetic field.

[0037] The rotating electric machine 1 is capable of enabling the rotation of the inner rotor 300 relative to the stator 100 by means of an electromagnetic moment (a torque) without the use of permanent magnets. In this inner rotor 300, the rotor teeth 302 are permitted to function as electromagnets whose magnetization directions (N-pole or S-pole) are alternately reversed along the arc length of the circle around the central longitudinal axis 1C, thereby enabling a smooth transition of magnetic flux, which couples via the outer rotor and the stator 100, around the slots 303.

[0038] This rotating electric machine 1 is capable of allowing the outer rotor 200 to rotate at low speeds and the inner rotor 300 to rotate at high speeds because the outer rotor 200 is rotatable relative to the stator 100 and because the inner rotor 300, to which the magnetic flux couples, flowing through the rotating outer rotor 200 (i.e., through the magnetic components 201), is caused to rotate relative to the outer rotor 200 by the electromagnetic torque. Furthermore, the rotating electric machine 1 is capable of allowing the outer rotor 200 to rotate at high speeds and the inner rotor 300 to rotate at low speeds.

[0039] Furthermore, this rotating electric machine 1 is configured, depending on a relationship between the construction of the stator 100, the outer rotor 200, and the inner rotor 300, to generate a torque required for the rotation described above. If “A” is the number of pole pairs of the armature coils 104 of the stator 100, if “H” is the number of pole shoe segments 201A, which constitute the number of poles of the outer rotor 200, and if “P” is the number of pole pairs of the rotor teeth (electromagnets) 302, i.e., the number of pole pairs of the inner rotor 300, then the aforementioned relationship can be expressed, in particular, by the following equation (1). H=|A±P|

[0040] If this relationship is satisfied, torque is efficiently generated to enable efficient relative rotation between the outer rotor 200 and the inner rotor 300 relative to the stator 100. For example, the rotating electric machine 1 according to the present embodiment satisfies equation (1) because A (the number of pole pairs of the armature coils 104 on the stator 100) = 4, H (the number of pole pairs of the outer rotor 200) = 12, and P (the number of pole pairs of the rotor teeth 302 on the inner rotor 300) = 8.

[0041] Now, referring to Fig. In the rotating electric machine 1, the outer rotor 200 is surrounded by the stator 100. Furthermore, the outer rotor 200 surrounds the inner rotor 300. The outer rotor 200 and the inner rotor 300 are rotatable about the central longitudinal axis 1C of the rotating electric machine 1.

[0042] An outer shaft 201, rotatable about the central longitudinal axis 1C, is integrally connected to the magnetic path component 201 of the outer rotor 200. An inner shaft 300, rotatable about the central longitudinal axis 1C, is integrally connected to the rotor core 301 of the inner rotor 300. This allows the rotating electric machine 1 to be configured as a dual-axis flux-modulated rotor, capable of transmitting power to both the outer shaft 210 and the inner shaft 310 by utilizing the flux modulation principle.

[0043] Therefore, the rotating electric machine 1 can be manufactured to perform the same function as a known planetary gear set, such that the stator 100 acts as a sun gear of the planetary gear set, the outer rotor 200 as a planet carrier of the planetary gear set, and the inner rotor 300 as a ring gear of the planetary gear set. In the illustrated rotating electric machine 1, the outer rotor 200 is manufactured to function as a planet carrier.

[0044] This enables the rotating electric machine 1 to function not only as a power transmission mechanism but also as a drive source when the rotating electric machine 1 is mounted on a hybrid electric vehicle together with a motor (i.e., an internal combustion engine) to form a drive source in which the outer shaft 210 of the outer rotor 200 and the inner shaft 310 of the inner rotor 300 are directly connected as parts of a power transmission path of the vehicle, and by connecting a battery of the vehicle to the armature coils 104 of the stator 100 via an inverter. (Outer rotor)

[0045] Referring to the Fig. 3 and Fig. 4 The outer rotor 200 further comprises the outer shaft 210 made of iron material, an annular flange 215 made of iron material and a cylindrical shaft 214 made of iron material, in addition to the previously described magnetic path component 201 and non-magnetic elements 202.

[0046] The outer shaft 210 comprises a column-shaped, small-diameter section 201A and a flange-like, large-diameter section 201B, which extends radially (relative to the central longitudinal axis 1C) continuously outward from an inner end of the small-diameter section 201A. The large-diameter section 210B extends radially further outward from the central longitudinal axis 1C than the small-diameter section 210A. The large-diameter section 210B is opposite the magnetic path component 201, such that its inner end, which extends radially outward from the central longitudinal axis 1C, faces the magnetic path component 201.

[0047] The small-diameter part 210A of the outer shaft 210 has a resolver ring 221, a resolver rotor 220, and a receptacle 218. The resolver rotor 220 is attached to the small-diameter part 210A by the resolver ring 221 in such a way that the resolver rotor 220 and the small-diameter part 210A are united for rotation about the central longitudinal axis 1C.

[0048] The receptacle 218, which is designed as an annular part, holds a radial ball bearing 21 described later, such that a section of an outwardly facing side carries an inner edge of the receptacle 218 opposite an outer ring of the radial ball bearing 21. Additionally, the receptacle 218 is provided with a plurality of screw-nut parts 218A, which engage with screws 26 described later.

[0049] The flange 215 is located between the large-diameter section 210B of the outer shaft 210 and an assembly of the magnetic path component 201 and the non-magnetic elements 202. The flange 215 is made of a non-magnetic material, such as aluminum. This prevents magnetic flux generated by the armature coils 104 from flowing as leakage flux to the outer shaft 210.

[0050] The large-diameter part 210B and the flange 215 are each formed with a first set of insertion holes 210B1 and a second set of insertion holes 215A. Each of the first and second sets of insertion holes 210B1 and 215A is arranged radially around the central longitudinal axis such that the insertion holes 210B1 and 215A are spaced apart from each other along the arc length of the circle around the central longitudinal axis 1C. Non-magnetic fasteners 219 are inserted into these insertion holes 210B1 and 215A. The non-magnetic elements 202 are formed with insertion holes 202A into which the non-magnetic fasteners 219 are inserted.

[0051] Each of the non-magnetic mounting elements 219 is made of a non-magnetic material that does not allow the flow of magnetic flux, e.g., polyphenylene sulfide (PPS) resin or the like. Compared to mounting elements 219 made of magnetic material, the permanence change (leg ratio) is therefore increased by the pole shoe segments 201A in the outer rotor 200 because the pole shoe segments 201A are magnetically independent. This results in an improved torque density of the rotating electric machine 1.

[0052] An eddy current occurring within the non-magnetic fasteners 219 is caused by harmonic magnetic flux occurring within the gap, and an eddy current occurring between the non-magnetic fasteners is caused by the harmonic magnetic flux. Because each of the non-magnetic fasteners 219 is made of non-magnetic material, losses due to such eddy currents are reduced.

[0053] The cylindrical shaft 214 is rotatable about the central longitudinal axis 1C and is located at the most distal axial ends of the magnetic path component 201 and the non-magnetic elements 202 from the large-diameter part 210B, with respect to the central longitudinal axis 1C (i.e., the left end face, as seen in Fig. 3) arranged. The cylindrical shaft 214 is designed with internal threaded holes 214A to engage with the non-magnetic fastening elements 219.

[0054] The cylindrical shaft 214 is made of non-magnetic material, such as stainless steel. This prevents the magnetic flux generated by the armature coils 104 from flowing outwards through the cylindrical shaft 214 as leakage flux.

[0055] During the assembly of the outer rotor 200, the outer shaft 210 and the flange 215 are firmly attached to the adjacent axial ends of the magnetic path components 201 and the non-magnetic elements 202 (i.e., the right end faces, as seen in Fig. 3) attached, and the cylindrical shaft 214 is firmly attached to the furthest axial ends of the magnetic path component 201 and the non-magnetic elements 202 (i.e., the left end side, as seen in Fig. 3) fastened by successively inserting the non-magnetic fasteners 219 into the insertion holes 210 of the large diameter part 210B and into the insertion holes 210A of the flange 215 and causing them to engage with the internal threaded holes 214A of the cylindrical shaft 214. (Inner rotor)

[0056] Referring to Fig. 3 and Fig. In Figure 5, the inner rotor 300 comprises the inner shaft 310 made of iron. The inner shaft 310 has an outer circumferential section. On the outer circumferential section, the inner shaft 310 has a compensating plate 311, a spacer 312, the rotor windings 330, a spacer 314, a diode holder 315, a compensating plate 316, a U-shaped sheet metal nut 317, a sensor 318, a resolver rotor 319, and a resolver ring 320.

[0057] The compensating plate 311, which is formed in a ring shape from iron material, is positioned axially relative to the central longitudinal axis 1c by a flange portion of the inner shaft 310, such that a section surrounding an inner edge of the compensating plate 311 is held in contact with the flange portion of the inner shaft 310. The compensating plate 311 holds the rotor windings 330 by means of spacers 312 from the adjacent axial end of the rotor windings 330 (i.e., the right end, as seen in Figure 1). Fig. 3).

[0058] The spacer 312 is arranged between the compensating plate 311 and the adjacent axial ends of the rotor windings 330. The spacer 312 is designed such that it extends radially outward from the central longitudinal axis 1C less than the rotor windings 330, thus leaving a space between the compensating plate 311 and the rotor windings 330. The spacer 312 is formed in a ring shape from aluminum. The compensating plate 311 and the spacer 312 are prevented from rotating relative to the inner shafts 310, so that they rotate integrally with the rotor windings 330.

[0059] The compensating plate 316, formed in a ring shape from iron material, is positioned axially relative to the central longitudinal axis 1C by a U-shaped sheet metal nut 317 such that a section surrounding an inner edge of the compensating plate 316 is held in contact with the U-shaped sheet metal nut 317. The compensating plate 316 holds the rotor windings 330 via the diode holder 315 and the spacer 314 from the other axial end of the rotor windings 330 (i.e., the left end, as seen in Fig. 3).

[0060] The spacer 314 is arranged between the diode holder 315 and the opposite axial end of the rotor windings 330. The spacer 314 is designed such that it extends further radially outward from the central longitudinal axis 1C than the rotor windings 330, thus leaving a space between the diode holder 315 and the rotor windings 330. The spacer 314 is formed in a ring shape from aluminum.

[0061] The diode holder 315 comprises a ring-shaped circuit board and holds the previously mentioned diodes D1, D2, D3, and D4. The compensating plate 316, the diode holder 315, and the spacer 314 are prevented from rotating relative to the inner shaft 310, so that they rotate in unison with the rotor windings 330.

[0062] The U-shaped sheet metal nut 317 has an inner circumferential surface formed with an internal thread (not shown) into which an external thread (not shown) on an outer circumferential surface of the inner shaft 310 is screwed. The rotor windings 330 are fixed to the inner shaft 310 against axial movement along and rotation about the central longitudinal axis 1C by screwing the U-shaped sheet metal nut 317 to the inner shaft 310, the rotor windings 330 being arranged between the compensating plates 311 and 316 via the spacers 312 and 314 and the diode holder 315.

[0063] The receptacle 318, which is formed with a ring shape, holds a radial ball bearing 23, which will be described later, such that a section of an outwardly facing side (i.e. the left axial end side, seen in Fig. 3), which is close to and surrounds an inner edge of the receptacle 318, rests against an outer ring of the radial ball bearing 23. At sections on an inwardly facing side (i.e., the right axial end face, as seen in Fig. 3), in addition, a receptacle 318 is provided with a plurality of screw nut parts 318A which engage with screws 25 described later. (Overall assembly including housing)

[0064] Referring to Fig. 3 the rotating electric machine 1 comprises a housing 10, in which the previously described stator 100, the outer rotor 200 and the inner rotor 300 are included.

[0065] The housing 10 comprises a first flange 11, a first spacer 12, a first housing or sub-housing 13, a second housing or sub-housing 14, a second spacer 15 and a second flange 16.

[0066] The first lower housing 13 comprises a disc-shaped plate part 13A and a cylindrical part 13B, which extends radially (relative to the central longitudinal axis 1C) continuously outwards from an outer edge at an inner end of the plate part 13A. The plate part 13A is formed with a central through-hole 13C. The through-hole 13C allows the small-diameter part 210A of the outer shaft 210 to pass through it.

[0067] The stator 100 is fixedly attached to an inner circumferential surface of the cylindrical part 13B. Furthermore, the cylindrical part 13B lies radially (relative to the central longitudinal axis 1C) opposite the magnetic path component 201 and the non-magnetic elements 202, the rotor core 301 of the inner rotor 300 and the rotor windings 330.

[0068] The stator 100, the magnetic path component 201 of the outer rotor 200 and the non-magnetic elements 202, the rotor core 301 of the inner rotor 300 and the rotor windings 330 are accommodated within the cylindrical part 13B as described.

[0069] The radial ball bearing 21 is arranged in the through-hole 13C. The radial ball bearing 21 is positioned relative to the central longitudinal axis 1C by inserting screws 26 into the plate part 13A of the first lower housing 13 and by screwing the screws 26 into the nut parts 218A of the receptacle 218. The plate part 13A of the first lower housing 13 rotatably supports the small-diameter part 210A of the outer shaft 210 via the radial ball bearing 21.

[0070] The resolver sensor 31 is fixedly mounted within the through-hole 13C. The disc-shaped resolver rotor 220 is attached to the small-diameter part 210A of the outer shaft 210, such that the resolver rotor 220 is radially (relative to the central longitudinal axis 1C) opposite the resolver sensor 31. The resolver rotor 220 is attached to the small-diameter part 210A by the resolver ring 221, so that the resolver rotor 220 and the small-diameter part 210A are united for rotation about the central longitudinal axis 1C.

[0071] The resolver sensor 31 detects a rotation angle of the outer rotor 200 by detecting a rotation angle of the resolver rotor 220.

[0072] The second lower housing 14 comprises an outer cylindrical part 14A, an inner cylindrical part 14B arranged inside the outer cylindrical part 14A, and a disc-shaped plate part 14C continuously connecting the outer and inner cylindrical parts 14A and 14B to join them together.

[0073] The first lower housing 13 and the second lower housing 14 are connected to each other in order to accommodate the stator 100, the outer rotor 200 and the inner rotor 300 by firmly fastening the cylindrical part 13B of the first lower housing 13 and the outer cylindrical part 14A of the second lower housing 14 with their opposing axial ends abutting each other by means of fastening elements not shown.

[0074] The outer cylindrical part 14A is radially opposite the axial end section of the cylindrical shaft 214 of the outer rotor 200 and supports the cylindrical shaft 214 rotatably via a radial ball bearing 22.

[0075] In the illustrated example, the rotor 200 is designed in the form of a cup-shaped structure in which the magnetic path component 201 and the non-magnetic elements 202 are attached to the large diameter part 210B of the outer shaft 210.

[0076] When the outer rotor 200 with the cup-shaped structure is supported on the first lower housing 13, electromagnetic vibration is increased when natural vibration occurs or when electromagnetic attraction forces act on the outer rotor 200, and the natural vibration of the outer rotor 200 becomes resonant, resulting in excessive force acting on the outer rotor 200. Furthermore, if the outer rotor 200 rotates eccentrically, excessive load is placed on the radial ball bearing supporting the outer rotor 200, impairing the durability of this radial ball bearing.

[0077] In the illustrated embodiment, the cylindrical shaft 214, which is integral with the outer rotor 200, is therefore supported on the second lower housing 14 by the radial ball bearing 22, which is larger in radial extent relative to the central longitudinal axis 1C than the radial ball bearing 21, which supports the outer shaft 210.

[0078] This allows the outer rotor 200 to be supported at both ends. This design prevents an increase in electromagnetic vibration and the application of excessive load to the radial ball bearing 21, which would be caused by an eccentric rotation of the outer rotor 200.

[0079] The resolver sensor 32 is fixedly mounted inside the inner cylindrical part 14B. The disc-shaped resolver rotor 319 is positioned on the inner shaft 310, such that the resolver rotor 319 is radially (relative to the central longitudinal axis 1C) opposite the resolver sensor 32. The resolver rotor 319 is attached to the inner shaft 310 by the resolver ring 320, so that the resolver rotor 319 and the inner shaft 310 are united for rotation about the central longitudinal axis 1C.

[0080] The resolver sensor 32 detects a rotation angle of the inner rotor 300 by detecting a rotation angle of the resolver rotor 319.

[0081] The radial ball bearing 23 is arranged within the inner cylindrical part 14B. The radial ball bearing 23 is positioned relative to the central longitudinal axis 1C by inserting screws 25 into the inner cylindrical part 14B and by screwing the screws 25 into the nut parts 318A of the receptacle 318. The inner cylindrical part 14B of the second lower housing 14 rotatably supports the inner shaft 310 via the radial ball bearing 23.

[0082] A radial ball bearing 24 is arranged inside the large-diameter part 210B of the outer shaft 210. The large-diameter part 210B rotatably supports the inner end section of the inner shaft 310.

[0083] The first spacer 12 is designed with a through-hole 12A. The through-hole 12A allows the passage of a cable 31A extending from the resolver sensor 31. The first spacer 12 is positioned between the first lower housing 13 and the first flange 11 to ensure sufficient space for the cable 31A to pass between the first lower housing 13 and the first flange 11.

[0084] The second spacer 15 is designed with a through-hole 15A. The through-hole 15A allows the passage of a cable 32A extending from the resolver sensor 32. The second spacer 15 is positioned between the second lower housing 14 and the second flange 16 to ensure sufficient space for the passage of the cable 32A between the second lower housing 14 and the second flange 16.

[0085] The first flange 11 is fixedly attached to the cylindrical first spacer 12 by means of fasteners (not shown). The first flange 11 has a flange shape that is larger radially than the first lower housing 13 relative to the central longitudinal axis 1C. The first flange 11 is adapted to be fixedly mounted to the vehicle body by means of fasteners (not shown).

[0086] A coupling 33 is rigidly connected to the end section of the small-diameter part 210A of the outer shaft 210. A vehicle drive shaft, for example, is connected to the small-diameter part 210A of the outer shaft 210 via this coupling 33. The rotation of the outer shaft 210 is transmitted to the vehicle drive shaft.

[0087] The second flange 16 is fixedly attached to the cylindrical second spacer 15 by means of fasteners (not shown). The second flange 16 is designed with a larger radial dimension relative to the central longitudinal axis 1C than the second lower housing 14. The second flange 16 is adapted to be fixedly mounted to the vehicle body by means of fasteners (not shown).

[0088] A coupling 34 is rigidly connected to the end section of the inner shaft 310 of the inner rotor 300. For example, an output shaft of an internal combustion engine (not shown) of the vehicle is connected to the inner shaft 310 via this coupling 34. The rotation of the internal combustion engine is transmitted to the inner shaft 310 via the coupling 34. In the illustrated rotating electric machine 1, the vehicle's drive shaft is connected to the outer shaft 210, and the output shaft of the internal combustion engine is connected to the inner shaft 310. In another embodiment, the output shaft of the internal combustion engine can be connected to the outer shaft 210, and the vehicle's drive shaft can be connected to the inner shaft 310. (Insulator)

[0089] In the rotating electric machine 1 configured in this way, the vibration of the internal combustion engine, in the case where the inner rotor 300 is connected to the output shaft of the internal combustion engine, is transmitted to the inner rotor 300 via the output shaft, causing the rotor windings 330 to vibrate against the inner rotor 300. In particular, the rotor windings 330 vibrate considerably when resonance occurs.

[0090] When the rotor windings 330 vibrate, the protective film of the rotor windings 330 is worn away because it is in sliding contact with the rotor teeth 302 made of electromagnetic steel plates, thus increasing the probability of the protective film breaking down. When the protective film of the rotor windings 330 breaks down, the rotor windings 330 are grounded.

[0091] In the Fig. In the illustrated example 6, the inner rotor 300 therefore comprises a plurality of insulators 340 made of resin with electrically insulating properties, each of which is located between one of the rotor teeth 302 and the associated one from the plurality of sets of rotor windings 330.

[0092] The rotor windings 330 are pre-wound around each of the insulators 340 and are held by them. The insulators 340, each holding the rotor windings 330, are attached to the respective rotor teeth 302, so that each insulator 340 surrounds one of the rotor teeth 302. This prevents contact between the rotor windings 330 and the rotor teeth 302, thus preventing the protective film of each rotor winding 330 from being worn down by sliding contact with the rotor teeth 302, and thus preventing a breakdown of the protective film.In the illustrated inner rotor 300, each of the rotor teeth 302 has no flange at its radially outer end, unlike the rotor teeth of the known rotating electrical machine, and thus it has the same cross-sectional profile for every cross-section through the rotor tooth 302 along the central longitudinal axis 1C, or it can have different cross-sectional profiles that gradually increase in area in a radial (relative to the central longitudinal axis 1C) direction towards the radially outer end.

[0093] The magnetic flux generated by the stator 100 and coupled to each of the induction coils I of the inner rotor 300 contains an asynchronous magnetic flux that varies unsynchronously with the rotation of the inner rotor 300. This asynchronous magnetic flux is prevented from being blocked, for example, by the flange of each of the existing rotor teeth, thus causing the induction coil I to efficiently generate induced current. Because each of the rotor teeth 302 lacks a flange, each of the insulators 340 can be attached to one of the rotor teeth 302 in a radial inward direction from the outside toward the central longitudinal axis 1C.

[0094] The detailed construction of each of the 340 insulators is described below. Referring to the Fig. 7, Fig. 8 and Fig. Figure 9 comprises an insulator 340, a tube or tube-like core 341, and a flange 342 on the tube-like core 341. The rotor windings 330 are wound around the tube-like core 341. In the installed state of the insulator 340 on the rotor tooth 302, the tube-like core 341 extends a length along the central longitudinal axis 1C and extends radially (relative to the central longitudinal axis 1C) outwards from the base of the rotor core 301. The flange 342 extends outwards from a radially outer end of the tube-like core 341 such that the flange 342 surrounds the radially outer end of the tube-like core 341. As shown in Figure 9, the insulator 340 is wound around the tube-like core 341. Fig. As can be seen in Figure 9, an outer surface of the flange 342 is flush with the outer circumferential surface 302a of the rotor tooth 302, which is surrounded by the insulator 340.

[0095] The induction coil I is wound around a radially outer section of the tube-like core 341 and spaced radially inwards from the flange 342 by a gap. The excitation coil F is wound around a radially inner section of the tube-like core 341.

[0096] The tube-like core 341 is formed with a fitting hole 341A, which has a rectangular cross-section. This fitting hole 341A is dimensioned to receive one of the rotor teeth 302, so that the rotor tooth 302 can be inserted into the fitting hole 341A without play.

[0097] The flange 342 extends circumferentially outwards from the radially outer end of the tube-like core 341 along the inner rotor 300, such that the outer surface of the flange 342 is flush with the outer circumferential surface 302a of the rotor tooth 302, which is surrounded by the insulator 340. Furthermore, the flange 342 extends axially along the central longitudinal axis 1C. The flange 342 extends circumferentially with an arc length of one circle around the central longitudinal axis 1C and axially with a length along the central longitudinal axis 1C such that the length along the central longitudinal axis 1C is longer than the arc length around the central longitudinal axis 1C.

[0098] Referring to the Fig. 6 and Fig. 9, each of the insulators 340, which is in a state of a cassette coil in which the induction coil I and the wound coil F are wound around the insulator 340, is attached to one of the rotor teeth 302 in a direction radially from the outside to the inside towards the central longitudinal axis 1C by inserting the rotor tooth 302 into the fitting hole 341A.

[0099] This not only protects the protective film of the rotor winding 330, but also improves the feasibility of assembly, because each of the insulators 340, which is in a state where the rotor windings are wound around the insulator 340, called "cassette coil structure", is attached to one of the rotor teeth 302 in a direction from the outside radially inwards to the central longitudinal axis 1C.

[0100] The insulator 340 has an intermediate rib 343 that separates an area around which the excitation coil F is wound from an area around which the induction coil I is wound. Similar to the flange 342, which extends outwards from the radially outer end of the tube-like core 341, the inner rib 344 extends outwards from the tube-like core 341 into the grooves 303.

[0101] The insulator 340 has an inner rib 344 which is arranged radially (relative to the central longitudinal axis 1C) further inwards than the intermediate rib 343. As with the flange 342, which extends outwards from the radially outer end of the tube-like core 341, the inner rib 344 extends outwards from the radially inner end of the tube-like core 341 into the grooves 303 and delimits the area around which the excitation coil F is wound.

[0102] In the configuration where each of the insulators 340 is installed on one of the rotor teeth 302, it is necessary to hold the insulators 340 in place to prevent them from detaching from the rotor teeth 302 due to centrifugal force during the rotation of the inner rotor 300. Therefore, in the present embodiment, the insulators 340 are held radially relative to the central longitudinal axis 1C of the inner rotor 300 by inserting each insulator 340 onto a pair of spacers 312 and 314, such that the insulator 340 is held axially between the pair of spacers 312 and 314.

[0103] Referring to the Fig. 7, Fig. 8, Fig. 9 and Fig. 10 Each of the insulators 340 has a pair of insulator retaining elements 345 which are arranged radially (relative to the central longitudinal axis 1C) further inwards than the inner rib 344. In particular, the insulator retaining elements 345 are arranged by a pair near two axial ends of the tube-like core 341, which are spaced apart from each other along the central longitudinal axis 1C and extend radially inwards from the base of the inner rib 344.

[0104] As from the Fig. 6 and Fig. As can be seen in Figure 7, each of the insulator retaining parts 345 is formed by a pair with a first height difference or step in the form of a concave section 345A. Each of the concave sections 345A is formed as an arc-shaped segment, so that when the insulators 340 are installed on the respective rotor teeth 302, the concave sections 345A are connected to each other to define a torus-shaped height difference or step in the form of a torus groove 347 around the central longitudinal axis 1C.

[0105] Now, referring to Fig. Eleven retaining rings in the form of the first and second spacers 312 and 314 are inserted into the insulator retaining parts 345 to hold the insulators 340. The first spacer 312 has a second height difference or step in the form of a first torus-shaped convex section 312A. Similarly, the second spacer has another second height difference or step in the form of a second torus-shaped convex section 314A. The first and second torus-shaped convex sections 312A are inserted into the torus grooves 347, each of which is formed by the plurality of concave sections 345A of the insulator retaining parts 345 of the insulator 340.

[0106] As from Fig.As can be seen in Figure 12, the insulators 340 are attached by inserting the first torus-shaped convex section 312A of the first spacer 312 into one of the torus grooves 347 and the second torus-shaped convex section 314A of the second spacer 314 into the other torus groove 347, so that the insulators 340 are arranged axially (relative to the central longitudinal axis 1C) between the first and the second spacers 312 and 314.

[0107] As described, the insulators 340 have the concave sections 345A, while the first and second spacers 312 and 314 have the first and second convex sections 312A and 314A. This arrangement is able to hold the insulators 340 against the centrifugal force, with the first and second convex sections 312A and 314A being inserted into the concave sections 345A, by mounting only the first and second spacers 312 and 314 along the central longitudinal axis 1C to position them between the insulators 340.

[0108] The convex sections can be formed on the insulators 340, and the concave sections can be formed on the first and second spacers 312 and 314. In other words, the insulators 340 can be attached by forming one of the convex or concave sections, which forms a torus-shaped height difference or step when the insulators 340 are installed on the plurality of rotor teeth 302, on the insulators, and by forming the other of the convex and concave sections on the first and second spacers 312 and 314.

[0109] The effects of the rotating electrical machine 1 as described above are described. As described above, each of the insulators 340, around which each of the induction coils I and one of the excitation coils F are wound, is installed on one of the rotor teeth 302 of the inner rotor 300.

[0110] According to the present embodiment, each of the insulator retaining parts 345 of the insulators 340 is formed with one of the concave sections 345A, which forms the torus grooves 347 around the central longitudinal axis 1C when the insulators 340 are installed on the plurality of rotor teeth 302, and the insulators 345 are fastened by inserting the first and second spacers 312 and 314, which have the first and second convex sections 312A and 314A, into the torus grooves 347.

[0111] This configuration prevents the insulators 340 from detaching from the first and second spacers 312 and 314 due to centrifugal force during the rotation of the inner rotor 300, because the insulators 340 are secured by inserting the first and second spacers 312 and 314 into the torus grooves 347 formed on the insulators 340 around the central longitudinal axis 1C.

[0112] Furthermore, the described configuration reduces assembly time and improves mechanical strength because the first and second spacers 312 and 314 are assembled axially along the central longitudinal axis 1C to position them between the insulators 340.

[0113] The configuration according to the present embodiment is advantageous in this respect compared to the use of a fixing agent to attach the insulators 340 to the rotor teeth 302, in that the distribution of the tensile strength is reduced and therefore the insulators 340 are held more securely against the centrifugal force. Furthermore, it is possible to reduce the weight of the rotating electric machine 1 because no fixing agent is used. Additionally, the amount of fixing agent can be reduced to achieve a weight reduction if the fixing agent is also used to attach the insulators 340 to the rotor teeth 303.

[0114] Although the embodiment of the present invention has been described, it is obvious to those skilled in the art that modifications can be made to it without departing from the scope of the present invention. All such modifications and their equivalents are to be encompassed by the following claims described herein.

[0115] In the present embodiment, the rotating electric machine 1 is of the internal rotor type, employing a radial gap design; however, it can also utilize an axial gap design or an external rotor type. Furthermore, the number of poles of the outer rotor 200 is not limited to the number of poles used in the present embodiment. Additionally, a copper wire, an aluminum conductor, or a stranded wire can be used for each of the coils. Electromagnetic steel plates can be replaced by soft magnetic composite cores (SMC cores) to form the magnetic path component 201 or the rotor core 301. The rotating electric machine 1 can be used not only in hybrid electric vehicles but also in wind turbine generators and machine tools. [List of reference symbols] 1 rotating electric machine 1C Central longitudinal axis 100 Stator 104 Armature coil 300 inner rotor (rotor) 302 rotor teeth (salient poles) 312, 314 Spacers (retaining rings) 312A, 314A convex section (second height difference) 330 Rotor winding (coil) 340 Insulator 345A concave section (first elevation change) 347 Torus-Nut (Height Difference).

Claims

[1] Rotating electric machine (1) with a central longitudinal axis (1C), comprising: a stator (100) comprising armature coils (104) wherein the armature coils (104) are configured to generate magnetic flux when excited; a rotor (300) rotatable about the central longitudinal axis (1C), wherein the rotor (300) comprises a plurality of salient poles (302) and coils (330) wound around the rotor (300) and with which the magnetic flux couples; and insulators (340) around which the coils (330) are wound, which are installed on the plurality of salient poles (302), characterized by , that Each of the insulators (340) has a first height difference (345A) which forms torus grooves (347) around the central longitudinal axis (1C) when the insulators (340) are installed on the plurality of leg poles (302) and wherein the insulators (302) are fastened by means of retaining rings (312, 314) which have second height differences (312A, 314A) which are inserted into the first height differences (345A).

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