Rhombus rotor assembly and rhombus rotor brushless generator

Abstract

The present invention relates to the technical field of generators, and in particular to a rhombus rotor assembly, comprising a rotating shaft, a rhombus magnetic pole and an annular magnetic pole, wherein the rhombus magnetic pole comprises a magnetic pole ring, a connecting ring plate and a plurality of pole palm blocks, wherein the magnetic pole ring is in a cylindrical shape, the connecting ring plate is sleeved on the magnetic pole ring, and the plurality of pole palm blocks are arranged circumferentially along the connecting ring plate; the magnetic pole ring, the connecting ring plate and the pole palm blocks are all located inside the annular magnetic pole, and a plurality of pole palm holes are provided on the side wall of the annular magnetic pole, wherein the plurality of pole palm holes are arranged circumferentially along the annular magnetic pole and correspond one to one to the pole palm blocks, the pole palm blocks are inserted into the pole palm holes, and the pole palm blocks are fixedly connected to the annular magnetic pole. The rhombus rotor assembly of the present invention can improve the power generation efficiency of the generator by reducing the leakage flux of the rotor magnetic pole.

Description

Technical Field

[0001] The present invention relates to the technical field of generators, and in particular to a diamond-shaped rotor assembly and a diamond-shaped rotor brushless generator. Background Art

[0002] At present, automotive generators are generally divided into two types, one is a brushed generator, and the other is a brushless generator. Since the carbon brushes of the brushed generator are easily worn, they need to be regularly maintained or replaced, with a short service life and high maintenance costs. Since the brushless generator has no carbon brushes and slip rings, it will not cause faults such as unstable excitation or non-generation of the generator due to poor contact and wear of the carbon brushes and slip rings. At the same time, there is no electric spark during operation, reducing radio interference. For some special vehicles with strict requirements for electromagnetic interference, the brushless motor is undoubtedly the best choice.

[0003] The commonly used brushless generator is a brushless generator with a claw-pole rotor. Due to its simple structure and wide use, the existing structure of the claw-pole brushless generator includes a stator, a claw-pole brushless rotor, a generator housing, etc.; among them, the claw-pole brushless rotor includes first claw-poles and second claw-poles that are interlaced with each other. During power generation, the magnetic field generated by the energized excitation winding forms a magnetic circuit through the first claw-pole of the rotor, the gap, the stator, the gap, the second claw-pole of the rotor, the rotor main shaft, and the first claw-pole of the rotor.

[0004] However, when the magnetic lines of force pass through the first claw-pole and the second claw-pole, the magnetic field polarities on the first claw-pole and the second claw-pole are opposite. Therefore, a large leakage magnetic flux will be generated between the first claw-pole and the second claw-pole. The greater the output of the generator, the greater the required excitation, and the greater the leakage magnetic flux. Therefore, the leakage magnetic flux greatly affects the output efficiency of the motor. Summary of the Invention

[0005] The technical problem to be solved by the present invention is: In order to solve the technical problem of the low output efficiency of the existing claw-pole generator, the present invention provides a diamond-shaped rotor assembly and a diamond-shaped rotor brushless generator, which can reduce the leakage magnetic flux of the rotor poles, thereby improving the power generation efficiency of the generator.

[0006] The technical solution adopted by the present invention to solve its technical problems is: providing a diamond-shaped rotor assembly, including a rotating shaft, and further including:

[0007] Diamond-shaped magnetic poles, the diamond-shaped magnetic poles include a magnetic pole ring, a connecting ring plate, and a plurality of pole shoe blocks. The magnetic pole ring is in a circular tubular shape, the magnetic pole ring is sleeved on the rotating shaft and fixedly connected to the rotating shaft, the connecting ring plate is sleeved on the magnetic pole ring and fixedly connected to the magnetic pole ring, and the plurality of pole shoe blocks are arranged circumferentially along the connecting ring plate, and the pole shoe blocks are fixedly connected to the connecting ring plate;

[0008] Annular magnetic pole, the annular magnetic pole is a tubular structure, the central axis of the annular magnetic pole is parallel or coincident with the central axis of the magnetic pole ring, the magnetic pole ring, the connecting ring plate and the pole shoe block are all located inside the annular magnetic pole, a plurality of pole shoe holes are formed in the side wall of the annular magnetic pole, the plurality of pole shoe holes are arranged along the circumferential direction of the annular magnetic pole and correspond to the pole shoe blocks one by one, the pole shoe blocks are inserted into the pole shoe holes, and the pole shoe blocks are fixedly connected with the annular magnetic pole.

[0009] In the diamond-shaped rotor assembly of the present invention, the diamond-shaped magnetic pole serves as one magnetic pole of the rotor, and the annular magnetic pole serves as the other magnetic pole of the rotor. The magnetic polarities at both ends of the annular magnetic pole are the same. Since the annular magnetic pole surrounds the diamond-shaped magnetic pole and the pole shoe blocks are inserted into the pole shoe holes, the magnetic field intensity is stronger near the pole shoe blocks, and the magnetic induction lines between the annular magnetic pole and the diamond-shaped magnetic pole will converge on the diamond-shaped magnetic pole, thereby reducing the magnetic flux leaked by the rotor.

[0010] Furthermore, the diameter of the middle of the annular magnetic pole is the largest, and the diameter of the annular magnetic pole gradually decreases from the middle to both axial ends.

[0011] Furthermore, the annular magnetic pole includes a first annular claw pole and a second annular claw pole. Both the first annular claw pole and the second annular claw pole are conical tubular structures. The first annular claw pole and the second annular claw pole are arranged along the axis direction of the magnetic pole ring. The first annular claw pole and the second annular claw pole are coaxially arranged. One end of the first annular claw pole close to the second annular claw pole is provided with a plurality of first pole shoe notches, and the plurality of first pole shoe notches are arranged along the circumferential direction of the first annular claw pole. One end of the second annular claw pole close to the first annular claw pole is provided with a plurality of second pole shoe notches, and the plurality of second pole shoe notches are arranged along the circumferential direction of the second annular claw pole. The first pole shoe notches and the second pole shoe notches correspond to each other one by one. The first annular claw pole and the second annular claw pole are fixedly connected to form an annular magnetic pole, and the first pole shoe notches and the second pole shoe notches form the pole shoe holes. By setting the annular magnetic pole as the first annular claw pole and the second annular claw pole, it is convenient to install the pole shoe blocks into the pole shoe holes. The magnetic polarities generated by the excitation coil on the first annular claw pole and the second annular claw pole are the same. The diamond-shaped magnetic pole is the common magnetic pole of the first annular claw pole and the second annular claw pole. Compared with two claw poles with staggered and different polarities, the magnetic potential and magnetic flux generated by the first annular claw pole and the second annular claw pole and the diamond-shaped magnetic pole will increase significantly, thereby greatly improving the output power of the motor.

[0012] Furthermore, the first annular claw pole and the second annular claw pole are fixedly connected by welding materials, and the materials of the welding materials, the first annular claw pole and the second annular claw pole are the same.

[0013] Further, both ends of the pole shoe block in the length direction are fixedly connected to the annular magnetic pole through connecting bars. One end of the connecting bar is fixedly connected to the pole shoe block, and the other end of the connecting bar is fixedly connected to the annular magnetic pole. The connecting bar is made of non-magnetic material.

[0014] Further, the pole shoe block and the annular magnetic pole are fixedly connected through an annular connecting piece. The annular connecting piece is arranged inside the annular magnetic pole. A plurality of the pole shoe blocks are all fixedly connected to the annular connecting piece. The outer side surface of the annular connecting piece is in contact with the inner side surface of the annular magnetic pole, and the annular connecting piece is fixedly connected to the annular magnetic pole.

[0015] Further, the length direction of the pole shoe block is parallel to the axis of the annular magnetic pole. The two end faces in the length direction of the pole shoe block are provided with first inclined surfaces. The first inclined surfaces are arranged to gradually approach the center of the pole shoe block from the end of the pole shoe block far away from the magnetic pole ring to the end of the pole shoe block close to the magnetic pole ring. The two end faces in the length direction of the pole hole are provided with second inclined surfaces. The second inclined surfaces are arranged parallel to the first inclined surfaces.

[0016] The present invention also provides a diamond rotor brushless generator including a diamond rotor assembly, further including

[0017] a generator housing. The diamond rotor assembly is installed inside the generator housing. The rotating shaft penetrates through two side surfaces of the generator housing and is rotatably connected to the generator housing;

[0018] two excitation coils. The two excitation coils are arranged side by side along the length direction of the rotating shaft. The two excitation coils are arranged on both sides of the connecting ring plate. The two excitation coils are both fixedly connected to the generator housing. Mounting holes are arranged on both of the two excitation coils. The mounting holes are arranged along the axial direction of the magnetic pole ring. Both ends of the magnetic pole ring are inserted into the mounting holes. A first air gap is arranged between the excitation coil and the magnetic pole ring. A second air gap is arranged between the side surface of the excitation coil close to the connecting ring plate and the end surface of the connecting ring plate. A third air gap is arranged between the end surface of the excitation coil far away from the magnetic pole ring and the inner side surface of the annular magnetic pole. An excitation winding is wound on the excitation coil. Both the excitation coil and the excitation winding are located inside the annular magnetic pole;

[0019] a stator. The stator is arranged inside the generator housing. The side surface of the stator far away from the generator housing covers the side surface of the pole shoe block far away from the magnetic pole ring. The stator is fixedly connected to the generator housing. A gap is provided between the stator and the pole shoe block.

[0020] The diamond-shaped rotor brushless generator of the present invention has an annular magnetic pole surrounding the diamond-shaped magnetic pole, and the side of the stator away from the generator housing covers the side of the pole shoe block away from the magnetic pole ring, so that the number of magnetic induction lines passing through the stator is large, thereby improving the power generation efficiency of the generator. Moreover, the diamond-shaped rotor assembly adopts two excitation coils, which reduces the excitation load of a single coil, reduces the internal resistance of a single excitation coil, reduces the heat generation of the excitation coil, thereby slowing down the speed of insulation aging of the excitation coil, avoiding the excitation coil from being burned out due to too high temperature, increasing the service life of the excitation coil, and further increasing the service life of the generator.

[0021] Further, the width of the gap is 0.35 - 0.5 mm. The gap is to ensure that the rotor can rotate freely in the stator cavity, and the size of the gap has a great influence on the performance and operation reliability of the generator. If the gap between the stator and the pole shoe block is too large, the magnetic resistance between the stator and the pole shoe block will increase, the excitation loss will increase, and the power generation efficiency of the generator will decrease. However, if the gap is too small, the gap harmonic magnetic field will increase, the noise of the generator will increase, and at the same time, if the gap is too small, it is easy for the stator and the pole shoe block to collide. In addition, too small a gap also brings difficulties to the assembly.

[0022] Further, the end face of the stator along the length direction of the rotating shaft is flush with the end face of the pole shoe block along the length direction.

[0023] The beneficial effect of the present invention is that the annular magnetic pole surrounds the diamond-shaped magnetic pole, and the magnetism of one magnetic pole of the excitation coil is conducted to the diamond-shaped magnetic pole, so that the diamond-shaped magnetic pole becomes a magnetic pole of the rotor. The magnetism of the other magnetic pole of the excitation coil is conducted to the annular magnetic pole, making the annular magnetic pole become the other magnetic pole of the rotor. Since the annular magnetic pole surrounds the diamond-shaped magnetic pole, the magnetic pole polarities at both ends of the annular magnetic pole are the same. The side of the stator away from the generator housing covers the side of the pole shoe block away from the magnetic pole ring, so that the number of magnetic induction lines passing through the stator is large, thereby reducing the leakage magnetic flux, and thus improving the power generation efficiency of the generator;

[0024] By setting the annular magnetic pole into a first annular claw pole and a second annular claw pole, it is convenient to install the pole shoe block into the pole shoe hole. The magnetic pole polarities generated by the excitation coil on the first annular claw pole and the second annular claw pole are the same. The diamond-shaped magnetic pole is the common magnetic pole of the first annular claw pole and the second annular claw pole. Compared with two claw poles with different polarities arranged alternately, the magnetic potential and magnetic flux generated by the first annular claw pole and the second annular claw pole and the diamond-shaped magnetic pole will increase significantly, thereby greatly improving the output power of the motor;

[0025] The diamond-shaped rotor assembly adopts two excitation coils, which reduces the excitation load of a single coil, decreases the internal resistance of a single excitation coil, reduces the heat generation of the excitation coil, thereby slowing down the aging speed of the insulation of the excitation coil, preventing the excitation coil from being burned out due to excessive temperature, increasing the service life of the excitation coil, and further enhancing the service life of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the drawings and embodiments.

[0027] Figure 1 It is a schematic structural diagram of the diamond-shaped rotor assembly of the present invention.

[0028] Figure 2 It is a top view schematic diagram of the diamond-shaped rotor assembly of the present invention.

[0029] Figure 3 is Figure 2 The sectional view taken along line A-A in

[0030] Figure 4 is Figure 3 The enlarged view at position A in

[0031] Figure 5 is Figure 2 The sectional view taken along line B-B in

[0032] Figure 6 It is the magnetic circuit schematic diagram of the brushless generator with a diamond-shaped rotor of the present invention.

[0033] Figure 7 It is the magnetic circuit schematic diagram of the claw-pole type generator of the comparative example in the embodiment of the present invention.

[0034] In the figures: 1, rotating shaft; 2, diamond-shaped magnetic pole; 3, magnetic pole ring; 4, connecting ring plate; 5, pole shoe block; 6, excitation coil; 7, excitation winding; 8, annular magnetic pole; 9, pole shoe hole; 10, first annular claw pole; 11, second annular claw pole; 12, first pole shoe notch; 13, second pole shoe notch; 14, welding material; 15, connecting bar; 16, first inclined surface; 17, second inclined surface; 18, generator housing; 19, stator; 20, gap; 21, annular connecting piece; 22, first air gap; 23, second air gap; 24, third air gap. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0035] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0036] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "mounted", "connected", and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Embodiment: As Figures 1 to 5 shown, a rhombic rotor brushless generator includes a rhombic rotor assembly, a generator housing 18, a stator 19, and two excitation coils 6. The rhombic rotor assembly is installed in the generator housing 18. The rhombic rotor assembly includes a rotating shaft 1, rhombic magnetic poles 2, and annular magnetic poles 8. The rotating shaft 1 penetrates through two sides of the generator housing 18 and is rotatably connected to the generator housing 18. The stator 19 is arranged inside the generator housing 18, and the stator 19 is fixedly connected to the generator housing 18.

[0038] The rhombic magnetic pole 2 includes a magnetic pole ring 3, a connecting ring plate 4, and a plurality of pole shoe blocks 5. The materials of the magnetic pole ring 3, the connecting ring plate 4, and the pole shoe blocks 5 can be selected as 08 steel. The magnetic pole ring 3 is in a circular tubular shape. The magnetic pole ring 3 is sleeved on the rotating shaft 1 and fixedly connected to the rotating shaft 1. The connecting ring plate 4 is sleeved on the magnetic pole ring 3 and fixedly connected to the magnetic pole ring 3. The plurality of pole shoe blocks 5 are arranged circumferentially along the connecting ring plate 4, and the pole shoe blocks 5 are fixedly connected to the connecting ring plate 4. The side of the stator 19 away from the generator housing 18 covers the side of the pole shoe block 5 away from the magnetic pole ring 3. The end face of the stator 19 in the length direction of the rotating shaft 1 is flush with the end face of the pole shoe block 5 in the length direction. There is a gap 20 between the stator 19 and the pole shoe block 5, and the width of the gap 20 is 0.35 - 0.5 mm. The gap 20 is to ensure that the rotor can rotate freely in the cavity of the stator 19. The size of the gap 20 has a great influence on the performance and operation reliability of the generator. If the gap 20 between the stator 19 and the pole shoe block 5 is too large, the magnetic resistance between the stator 19 and the pole shoe block 5 will increase, the excitation loss will increase, and the power generation efficiency of the generator will decrease. However, if the gap 20 is too small, the harmonic magnetic field of the gap 20 will increase, the noise of the generator will increase, and at the same time, if the gap 20 is too small, it is easy for the stator 19 and the pole shoe block 5 to collide. In addition, if the gap 20 is too small, it also brings difficulties to the assembly.

[0039] The annular magnetic pole 8 is a tubular structure. The central axis of the annular magnetic pole 8 is parallel to or coincides with the central axis of the magnetic pole ring 3. The diameter of the middle part of the annular magnetic pole 8 is the largest, and the diameter of the annular magnetic pole 8 gradually decreases from the middle to both ends in the axial direction. The magnetic pole ring 3, the excitation coil 6, and the excitation winding 7 are all located inside the annular magnetic pole 8. A plurality of pole shoe holes 9 are provided on the side wall of the annular magnetic pole 8. The plurality of pole shoe holes 9 are arranged circumferentially along the annular magnetic pole 8 and correspond to the pole shoe blocks 5 one by one. The pole shoe blocks 5 are inserted into the pole shoe holes 9. There is a distance between the pole shoe blocks 5 and the inner side wall of the pole shoe holes 9. The pole shoe blocks 5 and the annular magnetic pole 8 are fixedly connected through a non-magnetic part. The non-magnetic part can be a connecting bar 15. Both ends of the pole shoe block 5 in the length direction and the annular magnetic pole 8 are fixedly connected through the connecting bar 15. One end of the connecting bar 15 is fixedly connected to the pole shoe block 5, and the other end of the connecting bar 15 is fixedly connected to the annular magnetic pole 8. The connecting bar 15 is made of non-magnetic material. The non-magnetic part can also be an annular connecting piece (21). The pole shoe blocks 5 and the annular magnetic pole 8 are fixedly connected through the annular connecting piece (21). The annular connecting piece (21) is arranged inside the annular magnetic pole 8. The plurality of pole shoe blocks 5 are all fixedly connected to the annular connecting piece (21). The outer side face of the annular connecting piece (21) is in contact with the inner side face of the annular magnetic pole 8. The annular connecting piece (21) is fixedly connected to the annular magnetic pole 8. The annular connecting piece (21) is made of non-magnetic material.

[0040] Two exciting coils 6 are arranged along the length direction of the rotating shaft 1. The two exciting coils 6 are arranged on both sides of the connecting ring plate 4. Both of the two exciting coils 6 are fixedly connected to the generator housing 18. Mounting holes are provided on both of the two exciting coils 6. The mounting holes are arranged along the axial direction of the pole ring 3. Both ends of the pole ring 3 are inserted into the mounting holes. A first air gap 22 is provided between the exciting coil 6 and the pole ring 3. A second air gap 23 is provided between the side surface of the exciting coil 6 close to the connecting ring plate 4 and the end surface of the connecting ring plate 4. A third air gap 24 is provided between the end surface of the exciting coil 6 far from the pole ring 3 and the inner side surface of the annular magnetic pole 8. An exciting winding 7 is wound on the exciting coil 6. Both the exciting coil 6 and the exciting winding 7 are located inside the annular magnetic pole 8.

[0041] The length direction of the pole shoe block 5 is parallel to the axis of the annular magnetic pole 8. First inclined surfaces 16 are provided on both end surfaces in the length direction of the pole shoe block 5. The first inclined surfaces 16 are arranged to gradually approach the center of the pole shoe block 5 from the end of the pole shoe block 5 far from the pole ring 3 to the end of the pole shoe block 5 close to the pole ring 3. Second inclined surfaces 17 are provided on both end surfaces in the length direction of the pole shoe hole 9. The second inclined surfaces 17 are arranged parallel to the first inclined surfaces 16.

[0042] The annular magnetic pole 8 includes a first annular claw pole 10 and a second annular claw pole 11. Both the first annular claw pole 10 and the second annular claw pole 11 are conical tubular structures. The first annular claw pole 10 and the second annular claw pole 11 are arranged along the axis direction of the pole ring 3. The first annular claw pole 10 and the second annular claw pole 11 are coaxially arranged. One end of the first annular claw pole 10 close to the second annular claw pole 11 is provided with a plurality of first pole shoe notches 12. The plurality of first pole shoe notches 12 are arranged along the circumferential direction of the first annular claw pole 10. One end of the second annular claw pole 11 close to the first annular claw pole 10 is provided with a plurality of second pole shoe notches 13. The plurality of second pole shoe notches 13 are arranged along the circumferential direction of the second annular claw pole 11. The first pole shoe notches 12 and the second pole shoe notches 13 correspond to each other one by one. The first annular claw pole 10 and the second annular claw pole 11 are fixedly connected to form the annular magnetic pole 8. The first annular claw pole 10 and the second annular claw pole 11 are fixedly connected by welding with a welding material 14. The welding material 14, the first annular claw pole 10 and the second annular claw pole 11 are made of the same material. The first pole shoe notches 12 and the second pole shoe notches 13 form the pole shoe hole 9. By setting the annular magnetic pole 8 as the first annular claw pole 10 and the second annular claw pole 11, it is convenient to install the pole shoe block 5 into the pole shoe hole 9. The magnetic pole polarities generated by the exciting coil 6 on the first annular claw pole 10 and the second annular claw pole 11 are the same. The diamond-shaped magnetic pole 2 is the common magnetic pole of the first annular claw pole 10 and the second annular claw pole 11. Compared with two claw poles with different polarities arranged alternately, the magnetic potential and magnetic flux generated by the first annular claw pole 10 and the second annular claw pole 11 and the diamond-shaped magnetic pole 2 will increase significantly, thus greatly improving the output power of the motor.

[0043] Refer toFigure 3 and Figure 6 As shown in Figure 6 , an electric current is passed through the exciting coil 6, causing the exciting coil 6 to generate magnetism. After the left exciting coil 6 is energized, the magnetic pole generated at the left end is the S pole, and the magnetic pole at the right end is the N pole. After the right exciting coil 6 is energized, the magnetic pole generated at the left end is the N pole, and the magnetic pole at the right end is the S pole. Therefore, the two left and right exciting coils 6 conduct the magnetic poles to the diamond-shaped pole 2, making the magnetic pole of the diamond-shaped pole 2 the N pole, and the exciting coil 6 conducts the magnetic poles to the annular pole 8, making the magnetic poles at both ends of the annular pole 8 both the S pole. The magnetic poles of the exciting coil 6 can be changed by changing the direction of the current passed through the exciting coil 6, thereby changing the polarities of the diamond-shaped pole 2 and the annular pole 8. It is necessary to ensure that the polarities at both ends of the annular pole 8 are the same.

[0044] Referring to Figure 6 As shown in Figure 6 , the magnetic circuit on the diamond-shaped rotor assembly of the present invention is: pole shoe block 5 → gap 20 → stator 19 → gap 20 → annular pole 8 → exciting coil 6 → pole ring 3 → connecting ring plate 4 → pole shoe block 5. Since the annular pole 8 surrounds the diamond-shaped pole 2 and the magnetic poles at both ends of the annular pole 8 have the same polarity, and the side of the stator 19 away from the generator housing 18 covers the side of the pole shoe block 5 away from the pole ring 3, the magnetic induction lines between the diamond-shaped pole 2 and the annular pole 8 will all pass through the stator 19, thereby greatly reducing the leakage of magnetic flux and improving the power generation efficiency of the generator.

[0045] As Figure 7 shown in Figure 7 , the comparative example is a common claw-pole type generator, and the magnetic circuit is N pole → air gap between the rotor and the stator 19 → stator 19 → air gap between the stator 19 and the rotor → S pole → magnetic yoke → N pole. In the process of the magnetic force lines of the common claw-pole type generator from the N pole to the S pole, some magnetic induction lines will not pass through the stator 19, and the magnetic flux leakage between the N pole and the S pole of the rotor will be relatively large, which will reduce the output efficiency of the generator.

[0046] Perform power generation efficiency tests on the diamond-shaped rotor brushless generator of this embodiment and the common claw-pole type rotor brushless generator. As shown in Table 1, for the diamond-shaped rotor brushless generator of this example, record the time, the rotation speed of the generator shaft 1 during the test (the rotation speed unit is r / min), and the magnitude of the current passed through the exciting coil 6 (the unit is A), and then record the output voltage value (the unit is V), the output current value (the unit is A), the efficiency η of the generator, and the temperature of the generator.

[0047]

[0048] Table 1

[0049] As shown in Table 2, the power generation efficiency of a common brushless generator with a claw-pole rotor was tested. The time and the rotational speed of the generator shaft (the rotational speed unit is r / min) were recorded, and then the output voltage value (unit: V), output current value (unit: A), the efficiency η of the generator, and the temperature of the generator were recorded.

[0050]

[0051] Table 2

[0052] By comparing Table 1 and Table 2, it can be seen that, compared with the common brushless generator with a claw-pole rotor, the diamond-shaped rotor brushless generator of this embodiment has a significantly higher output current value and a significantly higher power generation efficiency at the same rotational speed, and the temperature of the diamond-shaped rotor brushless generator of this embodiment is lower than that of the brushless generator with a claw-pole rotor.

[0053] Therefore, in the present invention, the diamond-shaped magnetic pole 2 is surrounded by the annular magnetic pole 8. The magnetic pole polarities at both ends of the annular magnetic pole 8 are the same. The side of the stator 19 away from the generator housing 18 covers the side of the pole shoe block 5 away from the magnetic pole ring 3, so that the number of magnetic induction lines passing through the stator 19 is large, thereby reducing the leaked magnetic flux and improving the power generation efficiency of the generator. Moreover, the diamond-shaped rotor assembly of the present invention uses two exciting coils 6, which reduces the exciting load of a single coil, reduces the internal resistance of a single exciting coil 6, reduces the heat generation of the exciting coil 6, thereby slowing down the speed of insulation aging of the exciting coil 6, avoiding the exciting coil 6 being burned out due to too high temperature, thereby increasing the service life of the exciting coil 6, and further increasing the service life of the generator.

[0054] Taking the ideal embodiment of the present invention described above as an inspiration, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A rhombus rotor assembly, comprising a rotating shaft (1), characterized in that: Also includes: A rhombus-shaped magnetic pole (2), the rhombus-shaped magnetic pole (2) comprising a magnetic pole ring (3), a connecting ring plate (4) and a plurality of pole palm blocks (5), the magnetic pole ring (3) being in a cylindrical shape, the magnetic pole ring (3) being sleeved on a rotating shaft (1) and being fixedly connected to the rotating shaft (1), the connecting ring plate (4) being sleeved on the magnetic pole ring (3) and being fixedly connected to the magnetic pole ring (3), the plurality of pole palm blocks (5) being arranged circumferentially along the connecting ring plate (4), and the pole palm blocks (5) being fixedly connected to the connecting ring plate (4); An annular magnetic pole (8), the annular magnetic pole (8) being a tubular structure, the central axis of the annular magnetic pole (8) being parallel to or coincident with the central axis of the magnetic pole ring (3), the magnetic pole ring (3), the connecting ring plate (4) and the pole palm block (5) being all located inside the annular magnetic pole (8), a plurality of pole palm holes (9) being provided on the side wall of the annular magnetic pole (8), the plurality of pole palm holes (9) being arranged along the circumference of the annular magnetic pole (8) and corresponding one to one with the pole palm blocks (5), the pole palm blocks (5) being inserted into the pole palm holes (9), and the pole palm blocks (5) being fixedly connected to the annular magnetic pole (8); The diameter of the annular magnetic pole (8) is the largest in the middle, and the diameter of the annular magnetic pole (8) gradually decreases from the middle to the two axial ends; the two ends of the pole palm block (5) in the length direction are fixedly connected to the annular magnetic pole (8) via a connecting strip (15), one end of the connecting strip (15) is fixedly connected to the pole palm block (5), and the other end of the connecting strip (15) is fixedly connected to the annular magnetic pole (8), and the connecting strip (15) is made of non-magnetic conductive material.

2. The diamond rotor assembly according to claim 1, characterized in that: The annular magnetic pole (8) comprises a first annular claw pole (10) and a second annular claw pole (11), the first annular claw pole (10) and the second annular claw pole (11) are both conical tubular structures, the first annular claw pole (10) and the second annular claw pole (11) are arranged along the axial direction of the magnetic pole ring (3), the first annular claw pole (10) and the second annular claw pole (11) are coaxially arranged, and a plurality of first pole palm notches (12) are provided at one end of the first annular claw pole (10) close to the second annular claw pole (11), and the plurality of first pole palm notches (12) ) are arranged along the circumference of the first annular claw pole (10); a plurality of second pole palm notches (13) are provided at one end of the second annular claw pole (11) close to the first annular claw pole (10); the plurality of second pole palm notches (13) are arranged along the circumference of the second annular claw pole (11); the first pole palm notches (12) correspond to the second pole palm notches (13) one by one; the first annular claw pole (10) and the second annular claw pole (11) are fixedly connected to form an annular magnetic pole (8); the first pole palm notches (12) and the second pole palm notches (13) form the pole palm hole (9).

3. The diamond rotor assembly according to claim 2, characterized in that: The first annular claw pole (10) and the second annular claw pole (11) are fixedly connected by welding through a welding material (14); the welding material (14), the first annular claw pole (10) and the second annular claw pole (11) are made of the same material.

4. The diamond rotor assembly according to claim 1, characterized in that: The pole palm block (5) is fixedly connected to the annular magnetic pole (8) via an annular connecting piece (21); the annular connecting piece (21) is arranged inside the annular magnetic pole (8); a plurality of pole palm blocks (5) are fixedly connected to the annular connecting piece (21); the outer side surface of the annular connecting piece (21) is in contact with the inner side surface of the annular magnetic pole (8); the annular connecting piece (21) is fixedly connected to the annular magnetic pole (8); and the annular connecting piece (21) is made of non-magnetic conductive material.

5. The diamond rotor assembly according to claim 1, characterized in that: The length direction of the pole palm block (5) is parallel to the axis of the annular magnetic pole (8); two end surfaces of the pole palm block (5) in the length direction are provided with first inclined surfaces (16); the first inclined surfaces (16) are provided from one end of the pole palm block (5) away from the magnetic pole ring (3) to one end of the pole palm block (5) close to the magnetic pole ring (3) and gradually approach the center of the pole palm block (5); two end surfaces of the pole palm hole (9) in the length direction are provided with second inclined surfaces (17); the second inclined surfaces (17) are provided in parallel with the first inclined surfaces (16).

6. A rhombus rotor brushless generator having a rhombus rotor assembly as claimed in any one of claims 1 to 5, characterized in that: Also includes: A generator housing (18), wherein the diamond-shaped rotor assembly is installed in the generator housing (18), and the rotating shaft (1) passes through two side surfaces of the generator housing (18) and is rotatably connected to the generator housing (18); Two excitation coils (6), the two excitation coils (6) are arranged along the length direction of the rotating shaft (1), the two excitation coils (6) are arranged on both sides of the connecting ring plate (4), the two excitation coils (6) are fixedly connected to the generator housing (18), and the two excitation coils (6) are provided with mounting holes, the mounting holes are arranged along the axial direction of the magnetic pole ring (3), the two ends of the magnetic pole ring (3) are inserted into the mounting holes, and the excitation coils (6) and the magnetic pole ring (3) are connected to each other. ), a first air gap (22) is provided between the side surface of the excitation coil (6) close to the connecting ring plate (4) and the end surface of the connecting ring plate (4), a third air gap (24) is provided between the end surface of the excitation coil (6) away from the magnetic pole ring (3) and the inner side surface of the annular magnetic pole (8), an excitation winding (7) is wound around the excitation coil (6), and the excitation coil (6) and the excitation winding (7) are both located inside the annular magnetic pole (8); A stator (19), wherein the stator (19) is arranged inside a generator housing (18), and the side of the stator (19) away from the generator housing (18) covers the side of the pole palm block (5) away from the magnetic pole ring (3), the stator (19) is fixedly connected to the generator housing (18), and a gap (20) is provided between the stator (19) and the pole palm block (5).

7. The rhombus rotor brushless generator according to claim 6, characterized in that: The width of the gap (20) is 0.35-0.5 mm.

8. The diamond rotor brushless generator according to claim 6, characterized in that: The end surface of the stator (19) along the length direction of the rotating shaft (1) is flush with the end surface of the pole piece (5) along the length direction.

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