A rotor and a motor having the same

Abstract

The present invention provides a rotor and a motor having the same, wherein the rotor has a plurality of T-slots arranged along the circumference of the rotor; the T-slots include a left bottom, a right bottom and a center column; adjacent left and right bottoms are embedded with permanent magnets to form a radial magnetic circuit, and two adjacent center columns are embedded with permanent magnets to form a tangential magnetic circuit, thereby forming a mixed magnetic circuit of one magnetic pole; the left bottom and right bottom are respectively provided with a first magnetic isolation slot and a second magnetic isolation slot extending along the radial direction of the rotor; a magnetic isolation bridge with a gradually changing width and unequal lengths is formed between the first magnetic isolation slot and the second magnetic isolation slot, which can adjust the magnetic field formed by the permanent magnet; when the above-mentioned rotor is applied to the motor, the first magnetic isolation slot and the second magnetic isolation slot can adjust the sinusoidal distribution and leakage of the radial permanent magnet magnetic field, which can minimize the leakage of the permanent magnet and reduce torque pulsation; at the same time, the permanent magnet embedded in the center column of each T-slot can provide magnetic flux of two magnetic poles, effectively reducing the amount of permanent magnets used and reducing costs.

Description

Technical Field

[0001] The present invention belongs to the technical field of motors, and in particular relates to a rotor and a motor having the same. Background Art

[0002] Existing permanent magnet motors for compressors generally use embedded rare earth permanent magnet motors. These utilize the high residual magnetism of permanent magnets to significantly reduce the size and weight of the compressor. However, their size still has a lower limit. There is an urgent need for a motor structure that offers greater size advantages over existing permanent magnet motors while maintaining excellent motor efficiency and vibration noise. In the motor industry, this greater size advantage is referred to as higher torque density. Existing rotor structures that offer high torque density are hybrid magnetic circuit rotors, where both radial permanent magnets (one type with a radially distributed permanent magnet field) and tangential permanent magnets (one type with a tangentially distributed permanent magnet field) are embedded within the rotor. Cost considerations are also taken into account. In the prior art, the tangentially distributed tangential permanent magnets are combined, resulting in a configuration where adjacent rotor poles share a single tangential permanent magnet. This hybrid magnetic circuit permanent magnet motor generates more magnetic flux, significantly increasing the motor's output torque and significantly improving motor efficiency. However, this existing structure cannot ignore the leakage flux from the tangential and radial permanent magnets. Furthermore, the proximity of the tangential permanent magnets to the rotor's outer edge generates significant torque ripple, which impacts electromagnetic noise. Summary of the Invention

[0003] In view of this, the present invention provides a rotor and a motor having the same, so as to solve the problems of severe magnetic leakage and large torque pulsation in the prior art.

[0004] The present invention provides a rotor having a plurality of T-slots arranged along the circumference of the rotor and permanent magnets arranged in the T-slots; the T-slots include a bottom and a center column extending radially along the rotor; the bottom includes a left bottom and a right bottom, each of which is embedded with the permanent magnets having opposite magnetic poles; the center column is embedded with the permanent magnets;

[0005] The permanent magnets embedded in the adjacent left and right bottom parts form a radial magnetic circuit of a magnetic pole; the permanent magnets embedded in the two adjacent middle column parts form a tangential magnetic circuit of a magnetic pole; the radial magnetic circuit and the tangential magnetic circuit form a mixed magnetic circuit of a magnetic pole.

[0006] Further optionally, the permanent magnets embedded in the adjacent left bottom and right bottom provide a magnetic field for each magnetic pole; and the permanent magnet embedded in each middle column is shared by two magnetic poles and provides a magnetic field.

[0007] Further optionally, the left bottom and the right bottom respectively have a first magnetic isolation groove and a second magnetic isolation groove extending toward the edge of the rotor; the first magnetic isolation groove penetrates the left bottom, and the second magnetic isolation groove penetrates the right bottom.

[0008] Further optionally, the widths of the first magnetic isolation groove and the second magnetic isolation groove remain unchanged.

[0009] Further optionally, a magnetic isolation bridge is formed between adjacent first magnetic isolation slots and second magnetic isolation slots; the width of the magnetic isolation bridge has a gradual characteristic along the radial direction outward of the rotor, which is used to adjust the magnetic field formed by the permanent magnets embedded in the left bottom and the right bottom.

[0010] Further optionally, the magnetic isolation bridges along the radial direction outward of the rotor include a first magnetic isolation bridge with the same width, a second magnetic isolation bridge with a gradually increasing width, a third magnetic isolation bridge with a gradually decreasing width, and a fourth magnetic isolation bridge with a gradually increasing width.

[0011] Further optionally, widths of the first magnetic isolation bridge, the second magnetic isolation bridge, the third magnetic isolation bridge and the fourth magnetic isolation bridge are B1, B2, B3 and B4 respectively, wherein B2>B4>B3>B1.

[0012] Further optionally, the width B1 of the first magnetic isolation bridge is less than 0.6 mm.

[0013] Further optionally, the width of the left bottom and the right bottom is Bm, where 2(B1+B3) <B2<1.8Bm。

[0014] Further optionally, the lengths of the first magnetic isolation bridge, the second magnetic isolation bridge, the third magnetic isolation bridge and the fourth magnetic isolation bridge are L1, L2, L3 and L4 respectively, wherein L2>L3>L1>L4.

[0015] Further optionally, the width B1 and length L1 of the first magnetic isolation bridge satisfy 3B1 <L1<5B1。

[0016] Further optionally, the middle column portion has a third magnetic isolation groove extending toward the edge of the rotor; the third magnetic isolation groove penetrates the middle column portion.

[0017] Further optionally, the left bottom and the right bottom of each T-slot are symmetrically arranged about the center column of the T-slot; the first magnetic isolation groove and the second magnetic isolation groove at each T-slot are symmetrically arranged about the third magnetic isolation groove at the T-slot.

[0018] Further optionally, the rotor has 2N T-slots, where N is a natural number greater than or equal to 1.

[0019] The present invention further provides a motor having a stator and any one of the above-mentioned rotors, wherein the rotor is arranged in the stator; and the stator has stator teeth.

[0020] Further optionally, the tooth width of the stator teeth is Bt, and the maximum distance between the bent ends formed by the first magnetic isolation slot and the second magnetic isolation slot of adjacent rotors is B5, wherein 0.4Bt <B5<0.85Bt。

[0021] Further optionally, the air gap between the stator and the rotor is g, and the length of the fourth magnetic isolation bridge of the rotor is L4, where L4 <g。

[0022] Further optionally, the motor is a permanent magnet synchronous motor.

[0023] The rotor provided by the present invention has a plurality of T-slots arranged along the circumference of the rotor; wherein the T-slots include a left bottom, a right bottom and a middle column; the left bottom and the right bottom extend along the tangential direction of the rotor or are arranged at a certain angle, and the middle column extends along the radial direction of the rotor; adjacent left bottoms and right bottoms are embedded with permanent magnets to form a radial magnetic circuit; two adjacent middle columns are embedded with permanent magnets to form a tangential magnetic circuit; the radial magnetic circuit and the tangential magnetic circuit form a mixed magnetic circuit of one magnetic pole; the left bottom and the right bottom respectively have a first magnetic isolation slot and a second magnetic isolation slot extending along the radial direction of the rotor; the first magnetic isolation slot, the second magnetic isolation slot, the second magnetic isolation slot, the second magnetic isolation slot, the second magnetic isolation slot, the second magnetic isolation slot, the first ... first magnetic isolation slot, the second magnetic isolation slot, the first magnetic isolation slot, the first magnetic isolation slot, the second magnetic isolation slot, The two magnetic isolation grooves are arc-shaped or broken line-shaped; a magnetic isolation bridge with a gradually changing width and unequal lengths is formed between the first magnetic isolation groove and the second magnetic isolation groove, which can adjust the magnetic field formed by the permanent magnet; the middle column has a third magnetic isolation bridge extending toward the edge of the rotor; when the above-mentioned rotor is applied to the motor, the first magnetic isolation groove and the second magnetic isolation groove can adjust the sinusoidal distribution and leakage magnetic field of the radial permanent magnet, which can minimize the leakage magnetic field of the permanent magnet and reduce torque pulsation; at the same time, the permanent magnet embedded in the middle column of each T-slot can provide magnetic flux of two poles, effectively reducing the use of permanent magnets and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0025] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0026] Figure 1 A schematic structural diagram of a rotor embodiment provided by the present invention;

[0027] Figure 2 for Figure 1 A magnified view of middle A;

[0028] Figure 3 A schematic diagram of the structure of a motor embodiment provided by the present invention;

[0029] Figure 4 A schematic structural diagram of another embodiment of a rotor provided by the present invention;

[0030] In the picture:

[0031] 1-T-slot; 11-left bottom; 111-first magnetic isolation slot; 12-right bottom; 121-second magnetic isolation slot; 13-center column; 131-third magnetic isolation slot; 14-magnetic isolation bridge; 141-first magnetic isolation bridge; 142-second magnetic isolation bridge; 143-third magnetic isolation bridge; 144-fourth magnetic isolation bridge; 15-positioning hole; 16-mounting hole; 17-axis hole;

[0032] 21-left permanent magnet; 22-right permanent magnet; 23-center permanent magnet;

[0033] 31- stator; 311- stator teeth; 32- rotor. DETAILED DESCRIPTION

[0034] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0035] The terms used in the embodiments of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The singular forms "a," "the," and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates otherwise. "A plurality" generally includes at least two, but does not exclude the inclusion of at least one.

[0036] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0037] It should also be noted that the terms "include," "comprises," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a product or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such product or system. In the absence of further limitations, an element defined by the phrase "comprises a..." does not exclude the presence of other identical elements in the product or system comprising the element.

[0038] The rotor provided by the present invention has a plurality of T-slots arranged along the circumference of the rotor; wherein the T-slots include a left bottom, a right bottom and a middle column; the left bottom and the right bottom extend along the tangential direction of the rotor or are arranged at a certain angle, and the middle column extends along the radial direction of the rotor; adjacent left bottoms and right bottoms are embedded with permanent magnets to form a radial magnetic circuit; two adjacent middle columns are embedded with permanent magnets to form a tangential magnetic circuit; the radial magnetic circuit and the tangential magnetic circuit form a mixed magnetic circuit of one magnetic pole, which can effectively reduce the amount of permanent magnets used and reduce costs; the left bottom and the right bottom respectively have a first magnetic isolation groove and a second magnetic isolation groove extending along the radial direction of the rotor; the first magnetic isolation groove and the second magnetic isolation groove are arc-shaped or broken line-shaped, which can adjust the sinusoidal distribution of the radial magnetic field, minimize the leakage magnetic flux of the permanent magnet, and reduce torque pulsation.

[0039] Example 1

[0040] <Rotor>

[0041] like Figure 1 and Figure 2 As shown, the rotor provided in this embodiment has a plurality of T-slots 1 arranged along the circumference of the rotor and permanent magnets arranged in the T-slots 1; the T-slots 1 include a bottom and a middle column portion 13 extending along the radial direction of the rotor; the bottom includes a left bottom portion 11 and a right bottom portion 12, and the left bottom portion 11 and the right bottom portion 12 are inclined at a certain angle to the middle column portion 13 and extend toward the edge of the rotor 32; a left permanent magnet 21 is embedded in the left bottom portion 11, and a right permanent magnet 22 is embedded in the right bottom portion 12, and the left permanent magnet 21 and the right permanent magnet 22 have opposite magnetic poles; a middle permanent magnet 23 is embedded in the middle column portion 13; specifically, a positioning hole 15 is provided at the connection between the left bottom portion 11 and the right bottom portion 12 for positioning the left permanent magnet 21 and the right permanent magnet 22;

[0042] The left permanent magnet 21 embedded in the adjacent left bottom portion 11 and the right permanent magnet 22 embedded in the adjacent right bottom portion 12 form a radial magnetic circuit of a magnetic pole; the middle permanent magnet 23 embedded in the two adjacent middle column portions 13 form a tangential magnetic circuit of a magnetic pole; the radial magnetic circuit and the tangential magnetic circuit form a mixed magnetic circuit of a magnetic pole, and simultaneously provide two magnetic fluxes of a magnetic pole, which can effectively reduce the amount of permanent magnets used and reduce costs;

[0043] The rotor 32 is provided with a T-slot structure, which can arrange more permanent magnets and provide more air gap magnetic fields; the magnetic field of each pole of the rotor 32 is provided in parallel by the left permanent magnet 21 of the left bottom 11, the right permanent magnet 22 of the right bottom 12 and the permanent magnet 23 in the two middle columns 13. On the one hand, the leakage magnetic flux of the left permanent magnet 21 and the right permanent magnet 22 bypasses the first magnetic isolation slot 111 and the second magnetic isolation slot 121 to form a closed-loop magnetic circuit and generate leakage magnetic flux; on the other hand, the first magnetic isolation slot 111 and the second magnetic isolation slot 121 are placed at the center position of the magnetic field of each pole magnetic circuit, and their shape has a great influence on the magnetic flux distribution; therefore, the reasonable setting of the first magnetic isolation slot 111, the second magnetic isolation slot 121 and the magnetic isolation bridge 14 they constitute can effectively reduce leakage magnetic flux, and can also effectively adjust the air gap magnetic density, adjust the sinusoidality of the motor magnetic field, reduce various harmonic magnetic fields of the motor, and thereby improve electromagnetic noise.

[0044] Preferably, the left base 11 has a first magnetic isolation slot 111 extending toward the edge of the rotor 32 and intersecting the left base 11. The right base 12 has a second magnetic isolation slot 121 extending toward the edge of the rotor 32 and intersecting the right base 12. Specifically, the first magnetic isolation slot 111 extends to the left side of the left base 11, and the second magnetic isolation slot 121 extends to the right side of the right base 12. This minimizes magnetic leakage from the permanent magnets and reduces torque pulsation. The permanent magnets embedded in the left and right bases 11, 12, and center column 13 simultaneously provide magnetic flux for both poles, effectively reducing the number of permanent magnets used and lowering costs.

[0045] Preferably, the widths of the first magnetic isolation groove 111 and the second magnetic isolation groove 121 remain unchanged to reduce the distortion of the d-axis magnetic field and ensure a certain output torque. The first magnetic isolation groove 111 and the second magnetic isolation groove 121 provided in this embodiment are zigzag-line shaped.

[0046] Preferably, a magnetic isolation bridge 14 is formed between an adjacent first magnetic isolation slot 111 and a second magnetic isolation slot 121; the width of the magnetic isolation bridge 14 has a gradual characteristic in the radial direction outward of the rotor 32, which is used to adjust the magnetic field formed by the corresponding left permanent magnet 21 and the right permanent magnet 22, thereby limiting the leakage magnetic flux of the permanent magnets;

[0047] The first magnetic isolation groove 111 and the second magnetic isolation groove 121 are arranged along a broken line, so that the width of the magnetic isolation bridge 14 changes continuously and gradually in the radial direction of the rotor 32. On the one hand, it ensures the narrowest width and length of the leakage magnetic path and reduces leakage magnetic flux; on the other hand, it guides the flow direction of the stator magnetic field and the rotor magnetic field, weakens the odd harmonic magnetic field, sinusoidalizes the air gap magnetic density, and reduces electromagnetic vibration noise.

[0048] Preferably, the magnetic isolation bridge 14 radially outward along the rotor 32 has a first magnetic isolation bridge 141, a second magnetic isolation bridge 142, a third magnetic isolation bridge 143 and a fourth magnetic isolation bridge 144 in sequence; the radial width of the first magnetic isolation bridge 141 along the rotor 32 remains unchanged, the radial width of the second magnetic isolation bridge 142 along the rotor 32 gradually increases, the radial width of the third magnetic isolation bridge 143 along the rotor 32 gradually decreases, and the radial width of the fourth magnetic isolation bridge 144 along the rotor 32 gradually increases.

[0049] Preferably, the widths of the first magnetic isolation bridge 141 , the second magnetic isolation bridge 142 , the third magnetic isolation bridge 143 and the fourth magnetic isolation bridge 144 are B1 , B2 , B3 and B4 respectively, wherein B2 > B4 > B3 > B1 .

[0050] Preferably, the width B1 of the first magnetic isolation bridge 141 is less than 0.6 mm.

[0051] Preferably, the width of the left bottom 11 and the right bottom 12 is constant and consistent, constraining the width of the permanent magnet, limiting the width of the magnetic isolation bridge 14, and ensuring that the magnetic isolation bridge 14 is set to depend on the magnetic source. The width of the left bottom 11 and the right bottom 12 is Bm, where 2(B1+B3) <B2<1.8Bm。

[0052] Preferably, the width of the first magnetic isolation groove 111 is smaller than the width of the left bottom 11, and the width of the second magnetic isolation groove 121 is smaller than the width of the right bottom 12, so as to suppress the reduction of the effective value of the sinusoidal air magnetic flux density and ensure a certain output torque.

[0053] Preferably, along the radial direction of the rotor 32 , the lengths of the first magnetic isolation bridge 141 , the second magnetic isolation bridge 142 , the third magnetic isolation bridge 143 and the fourth magnetic isolation bridge 144 are L1 , L2 , L3 and L4 , respectively, wherein L2 > L3 > L1 > L4 .

[0054] Preferably, the width B1 and length L1 of the first magnetic isolation bridge 141 satisfy 3B1 <L1<5B1。

[0055] Preferably, the middle column portion 13 has a third magnetic isolation groove 131 extending toward the edge of the rotor 32; the third magnetic isolation groove 131 is connected to the middle column portion 13; specifically, the third magnetic isolation groove 131 has an even number and is evenly distributed on both sides of the middle column portion 13, and is inclined at a certain angle to the middle column portion 13.

[0056] Preferably, the left bottom and the right bottom of each T-slot 1 are symmetrically arranged about the middle column 13 of the T-slot 1; the first magnetic isolation groove 111 and the second magnetic isolation groove 121 at each T-slot 1 are symmetrically arranged about the third magnetic isolation groove 131 at the T-slot 1.

[0057] Preferably, while the end of the middle column portion 13 extends towards the edge of the rotor 32, its width gradually increases, so that a fourth magnetic isolation groove is formed between the end of the middle column portion 13 and the edge of the rotor 32, adjusting the magnetic field formed by the permanent magnet.

[0058] Preferably, the number of T-shaped grooves 1 is equal to the number of magnetic poles.

[0059] Preferably, a shaft hole 17 is formed at the center of the rotor 32, which is concentric with the outer circle of the rotor 32 and is used for connecting the rotor 32 to the shaft; a plurality of mounting holes 16 are provided in the circumferential direction of the rotor 32 for connecting between rotor punching sheets; specifically, the mounting holes 16 are rivet holes, and the plurality of mounting holes 16 are arranged regularly along the circumference.

[0060] In this embodiment, the rotor 32 has 6 T-shaped grooves, which are arranged regularly along the circumference. The left bottom portion 11, the right bottom portion 12, and the middle column portion 13 are all provided with corresponding permanent magnets. The left permanent magnet 21 embedded in the left bottom portion 11 of one T-shaped groove 1 and the right permanent magnet 22 embedded in the right bottom portion 12 of the adjacent T-shaped groove 1 form a radial magnetic circuit and provide a radial magnetic field; the middle permanent magnet 23 embedded in the middle column portion 13 of one T-shaped groove 1 and the middle permanent magnet 23 embedded in the middle column portion 13 of the adjacent T-shaped groove 1 form a tangential magnetic circuit and provide a tangential magnetic field, thus forming 6 magnetic poles; correspondingly, there are 6 first magnetic isolation grooves 111 and 6 second magnetic isolation grooves 121, and one third magnetic isolation groove 131 is provided on both sides of each middle column portion 13, so there are a total of 12 third magnetic isolation grooves 131.

[0061] <Motor>

[0062] As Figure 3 shown, this embodiment provides a motor, which has a stator 31 and the rotor 32 described in any one of the above, and the rotor 32 is arranged inside the stator 31. The stator 32 has a plurality of stator teeth 311.

[0063] Preferably, the tooth width of the stator tooth 311 is Bt, and the maximum distance between the bent ends formed by an adjacent first magnetic isolation groove 11 and a second magnetic isolation groove 121 is B5, where 0.4Bt < B5 < 0.85Bt, defining the circumferential widths of the first magnetic isolation groove 111 and the second magnetic isolation groove 121, ensuring the uniformity of the magnetic density of the stator tooth 311 and reducing torque ripple.

[0064] Preferably, the air gap between the stator 31 and the rotor 32 is g, and the length of the fourth magnetic isolation bridge 144 is L4, where L4 < g, defining the gradual change degree of the first magnetic isolation groove 111, the second magnetic isolation groove 121 and the outer edge line of the rotor 32, and the adjustment of the magnetic field is relatively significant.

[0065] Embodiment 2

[0066] <Rotor>

[0067] As Figure 4As shown, the rotor provided in this embodiment has a plurality of T-slots 1 arranged along the circumference of the rotor and permanent magnets arranged in the T-slots 1; the T-slots 1 include a bottom extending tangentially along the rotor 32 and a center column 13 extending radially along the rotor 32; the bottom includes a left bottom 11 and a right bottom 12, the left bottom 11 is embedded with a left permanent magnet 21, and the right bottom 12 is embedded with a right permanent magnet 22, and the left permanent magnet 21 and the right permanent magnet 22 have opposite magnetic poles; the center column 13 is embedded with a center permanent magnet 23;

[0068] The left permanent magnet 21 embedded in the adjacent left bottom 11 and the right permanent magnet 22 embedded in the right bottom 12 form a radial magnetic circuit of a magnetic pole; the middle permanent magnet 23 embedded in the two adjacent middle column parts 13 form a tangential magnetic circuit of a magnetic pole; the radial magnetic circuit and the tangential magnetic circuit form a mixed magnetic circuit of a magnetic pole, and provide two magnetic fluxes of one magnetic pole at the same time, which can effectively reduce the use of permanent magnets and reduce costs.

[0069] Preferably, the left bottom 11 has a first magnetic isolation groove 111 extending toward the edge of the rotor 32, and the first magnetic isolation groove 111 is connected to the left bottom 11; the right bottom 12 has a second magnetic isolation groove 121 extending toward the edge of the rotor 32, and the second magnetic isolation groove 121 is connected to the right bottom 12; specifically, the first magnetic isolation groove 111 extends to the left side of the left bottom 11; the second magnetic isolation groove 121 extends to the right side of the right bottom 12.

[0070] The first magnetic isolation groove 111 and the second magnetic isolation groove 121 provided in this embodiment are arc-shaped, and an arc-shaped magnetic isolation bridge is formed between an adjacent first magnetic isolation groove 111 and a second magnetic isolation groove 121; the width of the magnetic isolation bridge 14 radially outward along the rotor 32 has a gradual characteristic, which is used to adjust the magnetic field formed by the corresponding left permanent magnet 21 and the right permanent magnet 22.

[0071] Preferably, the middle column portion 13 has a third magnetic isolation groove 131 extending toward the edge of the rotor 32; the third magnetic isolation groove 131 is connected to the middle column portion 13; specifically, the third magnetic isolation groove 131 has an even number and is evenly distributed on both sides of the middle column portion 13, and is inclined at a certain angle to the middle column portion 13.

[0072] Preferably, the rotor 32 has 6 T-slots, and is arranged in a circular pattern. The left bottom 11, the right bottom 12 and the middle column 13 are all provided with corresponding permanent magnets. The left permanent magnet 21 embedded in the left bottom 11 of a T-slot 1 and the right permanent magnet 22 embedded in the right bottom 12 of the adjacent T-slot 1 constitute a radial magnetic circuit and provide a radial magnetic field; the middle permanent magnet 23 embedded in the middle column 13 of a T-slot 1 and the middle permanent magnet 23 embedded in the middle column 13 of the adjacent T-slot 1 constitute a tangential magnetic circuit and provide a tangential magnetic field, thereby forming 6 magnetic poles; correspondingly, there are 6 first magnetic isolation slots 111 and 6 second magnetic isolation slots 121; a third magnetic isolation slot 131 is provided on both sides of each middle column 13, and there are a total of 12 third magnetic isolation slots 131.

[0073] While the exemplary embodiments of the present disclosure have been specifically illustrated and described above, it should be understood that the present disclosure is not limited to the detailed structures, configurations, or implementations described herein; rather, the present disclosure is intended to encompass various modifications and equivalent configurations within the spirit and scope of the appended claims.

Claims

1. A rotor, characterized in that: The invention comprises a plurality of T-slots (1) arranged along the circumference of the rotor and permanent magnets arranged in the T-slots (1); the T-slots (1) include a bottom and a middle column (13) extending along the radial direction of the rotor; the bottom includes a left bottom (11) and a right bottom (12), each of which is embedded with the permanent magnets having opposite magnetic poles; the middle column (13) is embedded with the permanent magnets; The permanent magnets embedded in the adjacent left bottom (11) and right bottom (12) form a radial magnetic circuit of a magnetic pole, and the permanent magnets embedded in the adjacent two middle column parts (13) form a tangential magnetic circuit of a magnetic pole; the radial magnetic circuit and the tangential magnetic circuit form a mixed magnetic circuit of a magnetic pole; the magnetic field of each magnetic pole is provided in parallel by the permanent magnets embedded in the two adjacent middle column parts (13) and the permanent magnets embedded in the left bottom (11) and the right bottom (12) located between the two middle column parts (13); the permanent magnet embedded in each middle column part (13) is shared by the two magnetic poles and provides a magnetic field; The left bottom (11) and the right bottom (12) respectively have a first magnetic isolation groove (111) and a second magnetic isolation groove (121) extending toward the edge of the rotor; the first magnetic isolation groove (111) is connected to the left bottom (11), and the second magnetic isolation groove (121) is connected to the right bottom (12); the first magnetic isolation groove (111) and the second magnetic isolation groove (121) are both in a broken line shape; A magnetic isolation bridge (14) is formed between adjacent first magnetic isolation slots (111) and second magnetic isolation slots (121); radially outward from the rotor, the magnetic isolation bridge (14) comprises a first magnetic isolation bridge (141) with the same width, a second magnetic isolation bridge (142) with a gradually increasing width, a third magnetic isolation bridge (143) with a gradually decreasing width, and a fourth magnetic isolation bridge (144) with a gradually increasing width.

2. The rotor according to claim 1, characterized in that The widths of the first magnetic isolation groove (111) and the second magnetic isolation groove (121) remain unchanged.

3. The rotor according to claim 1, characterized in that The width of the magnetic isolation bridge (14) has a gradual change characteristic radially outward from the rotor, and is used to adjust the magnetic field formed by the permanent magnets embedded in the left bottom (11) and the right bottom (12).

4. The rotor according to claim 3, characterized in that The widths of the first magnetic isolation bridge (141), the second magnetic isolation bridge (142), the third magnetic isolation bridge (143) and the fourth magnetic isolation bridge (144) are B1, B2, B3 and B4 respectively, wherein B2>B4>B3>B1.

5. The rotor according to claim 3, characterized in that The width B1 of the first magnetic isolation bridge (141) is less than 0.6 mm.

6. The rotor according to claim 4, characterized in that The width of the left bottom (11) and the right bottom (12) is Bm, where 2(B1+B3) <B2<1.8Bm。 7. The rotor according to claim 4, characterized in that The lengths of the first magnetic isolation bridge (141), the second magnetic isolation bridge (142), the third magnetic isolation bridge (143) and the fourth magnetic isolation bridge (144) are L1, L2, L3 and L4 respectively, wherein L2>L3>L1>L4.

8. The rotor according to claim 7, characterized in that The width B1 and length L1 of the first magnetic isolation bridge (141) satisfy 3B1 <L1<5B1。 9. The rotor according to claim 1, characterized in that The middle column portion (13) has a third magnetic isolation groove (131) extending toward the edge of the rotor; the third magnetic isolation groove (131) is connected to the middle column portion (13).

10. The rotor according to claim 1, wherein The left bottom (11) and the right bottom (12) of each T-slot (1) are symmetrically arranged with respect to the center column (13) of the T-slot (1); and the first magnetic isolation groove (111) and the second magnetic isolation groove (121) at each T-slot (1) are symmetrically arranged with respect to the third magnetic isolation groove (131) at the T-slot (1).

11. The rotor according to claim 1, wherein The rotor has 2N T-slots (1), where N is a natural number greater than or equal to 1.

12. A motor, characterized in that: A stator and a rotor (32) according to any one of claims 1 to 11 are provided, wherein the rotor (32) is arranged in the stator (31); and the stator (31) has stator teeth (311).

13. The motor according to claim 12, characterized in that The tooth width of the stator teeth (311) is Bt, and the maximum distance between the bent ends formed by the first magnetic isolation slot (111) and the second magnetic isolation slot (121) of the adjacent rotor is B5, where 0.4Bt <B5<0.85Bt。 14. The motor according to claim 13, characterized in that The air gap between the stator (31) and the rotor (32) is g, and the length of the fourth magnetic isolation bridge (144) of the rotor is L4, where L4 <g。 15. The motor according to claim 12, characterized in that The motor is a permanent magnet synchronous motor.

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