Electric machine rotor arrangement and electric machine having electric machine rotor arrangement

Abstract

The invention relates to a motor rotor device and a motor with the motor rotor device. The motor rotor device includes: a rotating shaft; a main rotor coaxially mounted on the rotating shaft; an exciter rotor coaxially mounted on the rotation shaft at a position spaced apart from the main rotor along the rotation shaft; and the balance rectification assembly comprises a balance rectification disc which is coaxially arranged on the rotating shaft and is arranged between the main rotor and the exciter rotor in the axial direction of the rotating shaft, a rectifier assembly is arranged on the balance rectification disc, and the rectifier assembly is connected with a three-phase outgoing line of the exciter rotor. The rectifier assembly is integrally installed on the balance rectification disc, so that a three-phase leading-out cable of the exciter rotor can be directly connected to the rectifier assembly without penetrating through a shaft hole of the rotating shaft, and the cable does not need to be poured into the shaft hole to be cured, so that the production cost is reduced, and the reliability of rotary rectification is enhanced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of electrical engineering, and more particularly to a motor rotor device and a motor having the motor rotor device. Background Art

[0002] In traditional motor designs, as Figure 1A shown, the motor rotor includes a hollow rotating shaft A, a main rotor 10, an exciter rotor 20, a balance ring 30 disposed between the exciter rotor 20 and the main rotor 10, and a rectifying device 40 mounted on the shaft end at the non-driving end of the rotating shaft of the motor. In this structure of the motor rotor, the balance ring 30 and the rectifying device 40 are independent components. Among them, the rotating shaft A of the motor is configured as a hollow shaft for allowing the main rotor cable and the exciter rotor cable to penetrate and connect to the rectifying device 40. These cables are fixed in the shaft hole of the rotating shaft by potting.

[0003] However, this design presents some challenges. The depth design of the shaft hole requires specialized processing equipment and a long processing time, and the potting process is complex, requiring customized equipment, precise control of the colloid ratio, temperature, and curing process. In addition, ensuring reliable connection of the 12 joints of the six diodes D (as Figure 1B shown) of the rectifying device 40 to the main rotor cable and the exciter rotor cable is also a challenge. Moreover, the presence of heat dissipation ribs on the rectifying disk surface of the rectifying device makes the operating surface narrow, which is disadvantageous for assembly and disassembly. Summary of the Invention

[0004] (I) Technical Problems

[0005] To solve these problems, the present technology aims to achieve the balance function and the rectifying function through one unit to simplify the assembly process and reduce the operation risk. This integrated design helps to reduce the number of components, improve the assembly efficiency, and may reduce the failure rate, thereby improving the overall performance and reliability of the motor.

[0006] (II) Technical Solutions

[0007] To achieve the above object, the present disclosure is implemented through the following technical solutions:

[0008] According to one aspect of an embodiment of the present disclosure, there is provided a motor rotor device, including: a rotating shaft; a main rotor coaxially mounted on the rotating shaft; an exciter rotor coaxially mounted on the rotating shaft at a position spaced apart from the main rotor along the rotating shaft; and a balance rectifying assembly including a balance rectifying disk coaxially mounted on the rotating shaft and disposed between the main rotor and the exciter rotor in the axial direction of the rotating shaft, and a rectifier assembly is provided on the balance rectifying disk, and the rectifier assembly is connected to the three-phase lead-out wires of the exciter rotor.

[0009] In this way, the rectifier assembly is integrated on the balancing rectifier disk and has a balancing function, so that the three-phase lead-out cable of the exciter rotor can be directly connected to the rectifier assembly without being inserted into the shaft hole of the rotating shaft, thereby eliminating the need to glue and solidify the cable in the shaft hole, thereby reducing production costs and enhancing the reliability of rotary rectification. Moreover, the rotating shaft can also be a solid shaft, without considering the depth design of the shaft hole, without the need to use special processing equipment and reducing the processing time of the shaft hole. In addition, the installation can be completed by simply sleeve-mounting the balancing rectifier disk on the rotating shaft, which simplifies the installation steps, and only uses the installation space of the balancing rectifier disk to achieve all the functions of balancing and rectification, reducing the axial size inside the motor, and the size of the motor assembly-related parts is also reduced accordingly, reducing costs.

[0010] According to an exemplary embodiment of the present disclosure, a balanced rectifier disk includes: a balancing ring, an edge portion of which has a plurality of mounting locations, and the plurality of mounting locations are evenly distributed along the outer circumference of the balancing ring; and a rectifier assembly includes a plurality of rectifier modules, and the plurality of rectifier modules are assembled at the plurality of mounting locations, wherein the three-phase lead wires of the exciter rotor are connected to the lead-out terminals of the plurality of rectifier modules.

[0011] According to an exemplary embodiment of the present disclosure, the edge portion of the balancing ring has three mounting locations evenly distributed along the outer circumference of the balancing ring; and the rectifier assembly includes three rectifier modules, and the three rectifier modules are respectively assembled at the three mounting locations.

[0012] In this way, the balancing function and the rectification function are integrated on the same disk, which reduces the number of independent components, simplifies the assembly process of the motor rotor, and reduces the production cost. The three-phase lead wires of the exciter rotor are directly connected to the terminal of the rectifier module, which reduces the length and bends of the cable, reduces the risk of poor contact and short circuit in the electrical connection, and improves the overall stability and reliability of the electrical system.

[0013] According to an exemplary embodiment of the present disclosure, each rectifier module includes two rectifier diodes connected in series, and the two rectifier diodes of each rectifier module are packaged and solidified into one body by an insulating material.

[0014] In this way, using a rectifier module with two integrated rectifier diodes instead of a single diode can reduce the number of connection contacts, that is, reduce the original 12 joints to 9 joints, thereby enhancing the operating stability of the device. In addition, the two rectifier diodes of each rectifier module are encapsulated and solidified into one body through an insulating material, which can not only enhance the electrical performance but also resist the centrifugal force generated when the rotor rotates.

[0015] According to an exemplary embodiment of the present disclosure, the balance ring includes: a central portion having an annular shape, and the balance ring is sleeved on the rotating shaft through the central portion; an edge portion having an annular shape, located on the outer periphery of the balance ring and spaced apart from the central portion; a plurality of ribs disposed between the central portion and the edge portion and connecting the central portion and the edge portion; a plurality of ventilation holes, each ventilation hole being jointly defined by adjacent ribs and the sections of the central portion and the edge portion located between the adjacent ribs, and a plurality of balance holes arranged along the circumference of the balance ring on the edge portion, and each balance hole being capable of being provided with a detachable balance member.

[0016] In this way, the installation of the balance rectifier disk can be completed only by sleeving the annular central portion on the rotating shaft, and heat dissipation can be carried out by using the arc-shaped ventilation holes on the balance ring. The increase of the arc-shaped ventilation holes expands the ventilation area and strengthens the cooling effect.

[0017] According to an exemplary embodiment of the present disclosure, the edge portion includes a section portion located between adjacent ribs, wherein a plurality of balance holes are arranged on the section portion of the edge portion, each installation site is arranged at the position where the edge portion is connected to the rib and located between adjacent section portions, and each installation site is formed as a groove recessed from the edge portion towards the rib.

[0018] In this way, not only the balance function and the rectification function are integrated by a single balance rectifier disk, but also a high degree of compatibility with the existing main rotor and exciter rotor structures is achieved. This groove-type design provides a stable base for the installation of the rectifier module, and each module can be accurately embedded into the corresponding groove, improving the connection strength and reliability between the module and the balance ring.

[0019] According to an exemplary embodiment of the present disclosure, the balance rectification assembly further includes: an annular first DC disk coaxially installed on the rotating shaft and disposed at a position spaced apart from the balance ring along the rotating shaft on the surface side of the balance ring opposite to the main rotor; an annular second DC disk coaxially installed on the rotating shaft and disposed between the first DC disk and the balance ring, wherein the second DC disk is spaced apart from the first DC disk and the balance ring; and a first bridge-shaped connection bracket spanning between the rectifier module and the first DC disk, the first bridge-shaped connection bracket electrically connecting the negative terminal of the rectifier module to the first DC disk; a second bridge-shaped connection bracket spanning between the rectifier module and the second DC disk, the second bridge-shaped connection bracket electrically connecting the positive terminal of the rectifier module to the second DC disk.

[0020] In this way, this double-bridge type bracket connection solution not only effectively separates the anode and cathode of the direct current, avoiding the risk of electrical short circuit, but also ensures the balanced flow of current in the circuit, enhancing the safety and reliability of the electrical system. Through the synergistic effect of the first and second bridge-type connection brackets, not only the efficient transmission of direct current is achieved, but also a circuit loop is formed to realize the stable operation of the device.

[0021] According to an exemplary embodiment of the present disclosure, the first bridge-type connection bracket includes: a first bracket main body spanning the rectifier module and the first DC panel; a first branch arm extending perpendicularly from the first bracket main body to physically and electrically connect to the negative terminal of the rectifier module; and a second branch arm extending perpendicularly from the first bracket main body to physically and electrically connect to the first DC panel. The second bridge-type connection bracket includes: a second bracket main body spanning the rectifier module and the second DC panel; a first branch arm extending perpendicularly from the second bracket main body to physically and electrically connect to the positive terminal of the rectifier module; and a second branch arm extending perpendicularly from the second bracket main body to physically and electrically connect to the second DC panel.

[0022] In this way, the use of the bridge-type connection bracket with such a structure realizes that the positive terminal and the negative terminal can be directly and firmly connected to the corresponding current panels with a simple structure, constructing a closed and stable current loop.

[0023] According to an exemplary embodiment of the present disclosure, it further includes a main rotor cable that connects the main rotor to the first DC panel and the second DC panel, wherein the main rotor cable is axially arranged along the outer surface of the rotating shaft and fixed to the outer surface of the rotating shaft through a cable fixing member.

[0024] In this way, since the main rotor cable is axially arranged along the outer surface of the rotating shaft, there is no need to adopt the method of passing the main rotor cable through the shaft hole and curing the main rotor cable with glue in the shaft hole, thereby reducing the production cost and enhancing the reliability of the rotating rectification of the motor rotor device.

[0025] According to an exemplary embodiment of the present disclosure, the first DC panel, the second DC panel, and the balance ring are fixed to each other through a plurality of insulating fasteners, and the plurality of insulating fasteners are positioned at positions where the installation part is not covered by the rectifier module.

[0026] In this way, the first and second DC panels are fixed to the balance ring through a plurality of insulating fasteners, thereby preventing the first and second DC panels from loosening, and at the same time being able to isolate the anode and cathode of the direct current to ensure reliable electrical operation. Moreover, since the plurality of insulating fasteners are positioned at positions where the installation part is not covered by the rectifier module, the balancing effect of the balance ring can be maximally realized.

[0027] According to an exemplary embodiment of the present disclosure, the balanced rectifier assembly further includes a varistor disposed on a surface of the balancing ring opposite to the exciter rotor corresponding to the rectifier module, and the varistor is connected in parallel with the rectifier module.

[0028] In this way, by connecting the varistor in parallel with the anode terminal and cathode terminal of the rectifier module, overvoltage generated during operation can be prevented. Moreover, in this structure, the rectifier module and the varistor, which are consumable parts, are placed in a position that is easy to install and remove, so that users can directly operate from the non-shaft extension end, realizing the convenience of disassembly and maintenance.

[0029] According to an exemplary embodiment of the present disclosure, the rotating shaft is a solid shaft or a hollow shaft.

[0030] In the embodiment where the rotating shaft adopts a hollow shaft, the main rotor cable is still arranged axially along the outer surface of the rotating shaft. However, in the process of testing the motor rotor device to measure the rotor parameters before the motor rotor device is put into use, the measuring cable connected to the main rotor cable can be led out from the hollow shaft to the shaft end of the non-driving end of the rotating shaft by passing the measuring cable through the shaft hole and curing the measuring cable by glue filling the shaft hole, and the measuring cable can be connected to the slip ring provided on the shaft end to measure the rotor parameters. After completing the test of the motor rotor device, the measuring cable and the slip ring can be removed to put the motor rotor device into use.

[0031] According to another exemplary embodiment of the present disclosure, a motor is provided, comprising the motor rotor device described above.

[0032] (III) Technical Effect

[0033] In the disclosed embodiment, since the balancing function and the rectifying function are integrated on the balancing rectifier disk, the three-phase lead-out cables of the exciter rotor can be directly connected to the rectifier assembly without being inserted into the shaft hole of the rotating shaft, thereby eliminating the need to glue and solidify the cables in the shaft hole, thereby reducing production costs and enhancing the reliability of rotary rectification. In addition, the use of a rectifier module integrated with two rectifying diodes instead of a single diode can reduce the number of connection contacts and enhance the operating stability of the device. Furthermore, the installation can be completed by simply sleeve-mounting the balancing rectifier disk on the rotating shaft, which simplifies the installation steps, and realizes all the functions of balancing and rectifying using only the installation space of the balancing rectifier disk, thereby reducing the axial size inside the motor, and the size of the motor assembly-related parts is also reduced accordingly, reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The drawings described herein are used to provide a further understanding of the present disclosure and constitute a part of the present disclosure. The illustrative embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation on the present disclosure. In the drawings:

[0035] Figure 1A and Figure 1B are respectively schematic diagrams of a motor rotor device and a rectifying disk according to the prior art.

[0036] Figure 2 is a schematic diagram of a motor rotor device according to an embodiment of the present disclosure, observed from the side of the exciter rotor.

[0037] Figure 3 is a schematic diagram of a motor rotor device according to an embodiment of the present disclosure, observed from the side of the main rotor.

[0038] Figure 4 is a schematic diagram of the structure of a balance ring of a balance rectifying disk in a balance rectifying assembly of a motor rotor device according to an embodiment of the present disclosure.

[0039] Explanation of reference numerals in the drawings:

[0040] A Rotating shaft;

[0041] 10 Main rotor;

[0042] 10A Main rotor cable;

[0043] 10B Cable fixing member;

[0044] 20 Exciter rotor;

[0045] 300 Balance rectifying assembly;

[0046] 30 Balance ring;

[0047] 301 Edge portion;

[0048] 301A Mounting portion;

[0049] 302 Central portion;

[0050] 303 Rib;

[0051] 304 Ventilation hole;

[0052] 305 Balance hole;

[0053] 31 Rectifier module;

[0054] 31A Lead-out terminal;

[0055] 31B Negative terminal;

[0056] 31C Positive terminal;

[0057] 32 First DC disk;

[0058] 33 Second DC disk;

[0059] 34 The first bridge-type connection bracket;

[0060] 35 The second bridge-type connection bracket;

[0061] 36 Insulating fastener;

[0062] 37 Varistor. Detailed implementation manners

[0063] To enable those skilled in the art to better understand the present disclosure solution, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present disclosure. Obviously, the described embodiments are only a part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

[0064] It should be noted that the terms "first", "second", etc. in the specification and claims of the present disclosure and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, control method, system, product or device comprising a series of steps or units or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, control methods, products or devices.

[0065] As discussed in the background art above, in the traditional rotor structure design of an electric motor, the balance ring and the rectifying device are independent components, and the rectifying device is arranged on the shaft end of the non-driving end of the rotating shaft of the electric motor. Therefore, the rotating shaft needs to be set as a hollow shaft for the main rotor cable and the exciter rotor cable to pass through and be connected to the rectifying device, and these cables need to be fixed in the shaft hole of the rotating shaft by potting. Therefore, there are problems such as complex potting process, the need to customize equipment, accurately control the colloid ratio, temperature and curing process. In addition, it is also a challenge to ensure the reliable connection of the 12 joints of the six diodes of the rectifying device and the main rotor cable and the exciter rotor cable. Moreover, the presence of the heat dissipation ribs on the rectifying disk surface of the rectifying device makes the operation surface narrow, which is not conducive to assembly and disassembly.

[0066] Therefore, the concept of the present disclosure is to realize the balance and rectifying functions through one unit to simplify the assembly process and reduce the operation risk. This integrated design helps to reduce the number of components, improve the assembly efficiency, and may reduce the failure rate, thereby improving the overall performance and reliability of the electric motor.

[0067] The motor rotor device according to an embodiment of the present disclosure will be described in detail below.

[0068] Figure 2 is a schematic view of the motor rotor device according to an embodiment of the present disclosure as viewed from the exciter rotor side, Figure 3 is a schematic view of the motor rotor device according to an embodiment of the present disclosure as viewed from the main rotor side. As Figure 2 and Figure 3 shown, the motor rotor device may include: a rotating shaft A; a main rotor 10 coaxially mounted on the rotating shaft A; an exciter rotor 20 coaxially mounted on the rotating shaft A and located at a position spaced apart from the main rotor 10 along the rotating shaft A; and a balance rectification assembly 300 including a balance rectification disk coaxially mounted on the rotating shaft A and arranged between the main rotor 10 and the exciter rotor 20 in the axial direction of the rotating shaft A. A rectifier assembly is provided on the balance rectification disk, and the rectifier assembly is connected to the three-phase lead-out wires of the exciter rotor 20, as specifically described by way of example below.

[0069] Specifically, by way of example, as Figure 2 shown, the balance rectification disk may include: a balance ring 30 coaxially mounted on the rotating shaft A and arranged between the main rotor 10 and the exciter rotor 20 in the axial direction of the rotating shaft A. The edge portion 301 of the balance ring 30 may have a plurality of mounting portions 301A (as Figure 4 shown, by way of example, may be three), and the plurality of mounting portions 301A are uniformly distributed along the outer circumference of the balance ring 30; and a rectifier assembly including a plurality of (as Figure 2 shown, by way of example, may be three) rectifier modules 31, and the plurality of rectifier modules 31 are respectively assembled at the plurality of mounting portions 301A (as Figure 4 shown), wherein the three-phase lead-out wires 20A of the exciter rotor 20 are respectively connected to the lead-out connection terminals 31A of each rectifier module 31.

[0070] Although the drawings of the present disclosure show three mounting portions and three rectifier modules, the scope of the present disclosure is not limited to the examples shown in the drawings. The mounting portions may be set according to the number of rectifier modules required for actual applications, or one or more rectifier modules may be provided at one of the plurality of mounting portions, and other components may be assembled at any other of the plurality of mounting portions to achieve balance. These other embodiments that can be conceived according to the inventive concept of the present disclosure are all within the protection scope of the present disclosure.

[0071] By way of example, as Figure 2As shown, each rectifier module 31 may include two rectifier diodes connected in series and have a lead terminal 31A, an anode terminal 31C, and a cathode terminal 31B.

[0072] In the motor rotor device of the present disclosure, the three-phase lead wires 20A of the exciter rotor 20 can be directly connected to the lead terminal 31A of the rectifier module 31, without using the method of passing a cable through a shaft hole and curing the cable with glue in the shaft hole, thereby reducing the production cost and enhancing the reliability of rotating rectification.

[0073] As an example, the two rectifier diodes of each rectifier module 31 can be encapsulated and cured as a whole by an insulating material. Thus, the electrical performance of the rectifier module can be enhanced while also being able to resist the large centrifugal force generated during rotor rotation.

[0074] For example, the insulating material for encapsulating the rectifier diodes may include epoxy resin, polyimide, polytetrafluoroethylene (PTFE), silicone rubber, etc. and any combination thereof. By using any one or a combination of the above insulating materials, the two rectifier diodes in each rectifier module 31 can be encapsulated and cured as a whole, thereby significantly enhancing the electrical performance of the rectifier module, effectively resisting the centrifugal force during rotor rotation, and ensuring the stability and safety of the motor under high-speed operating conditions.

[0075] As an example, as Figure 2 , Figure 3 and Figure 4 shown, where Figure 4 shows a schematic diagram of the structure of a balance ring in a balanced rectifier disk of a motor rotor device according to an embodiment of the present disclosure. The balance ring 30 may include: a central portion 302, the central portion 302 having an annular shape, and the balance ring 30 is sleeved on the rotating shaft A through the central portion 302; an edge portion 301, the edge portion 301 having an annular shape, located on the outer periphery of the balance ring 30 and spaced apart from the central portion 302; a plurality of ribs 303, disposed between the central portion 302 and the edge portion 301 and connecting the central portion 302 and the edge portion 301; a plurality of ventilation holes 304, each ventilation hole 304 being jointly defined by adjacent ribs 303 and the sections of the central portion 302 and the edge portion 301 located between the adjacent ribs 303; and a plurality of balance holes 305, arranged along the circumference of the balance ring 30 on the edge portion 301, each balance hole 305 being capable of setting a detachable balance member.

[0076] In a motor rotor device, balance components can be used to assist in counteracting the unbalanced forces and torques generated due to the rotation of components, thereby reducing vibration and noise, and improving the mechanical stability and lifespan. As an example, the balance components can include bolts, screws, pins, expansion tubes, press-fit fasteners, etc. These fittings are all detachable, so that a certain number of balance components can be assembled according to the balance requirements of the actual application, thereby achieving the overall balance of the motor rotor device.

[0077] As Figure 4 shown, the edge portion 301 includes a section portion 301B located between adjacent ribs 303. Among them, a plurality of balance holes 305 are arranged on the section portion 301B of the edge portion 301. Each mounting portion 301A is provided at the position where the edge portion 301 is connected to the rib 303 and is located between adjacent section portions 301B, and each mounting portion 301A can be formed as a groove recessed from the edge portion 301 towards the rib 303. As a preferred implementation considering multiple aspects of the design, installation, and balance of the motor rotor device, the number of ribs 303 can be three, as Figure 4 shown.

[0078] The mounting portions 301A on the balance ring 30 can be configured as grooves (notches, gaps) recessed from the edge portion 301 towards the rib 303 and are evenly distributed on the outer periphery of the edge portion. This design not only enables a balance rectifier disk to integrate balance and rectification functions, but also achieves a high degree of compatibility with the existing main rotor and exciter rotor structures. By evenly distributing these groove-type mounting portions 301A on the edge portion 301 of the balance ring, it can be ensured that the installation of the rectifier module will not have an adverse impact on the dynamic balance characteristics of the balance ring, because this distribution method ensures the uniformity and symmetry of the mass distribution, and can maintain the stable operation of the motor even under high-speed rotation conditions.

[0079] In addition, this groove-type design provides a stable base for the installation of the rectifier module. Each module can be precisely embedded into the corresponding groove, improving the connection strength and reliability between the module and the balance ring. At the same time, through reasonable design, the groove depth and width of each mounting portion 301A can accurately match the size of the rectifier module, ensuring the stability of the module and the tightness of the electrical connection, and reducing the risk of poor electrical contact caused by mechanical vibration.

[0080] In addition, this design method also takes into account the compatibility with the existing structure, ensuring that the installation of the rectifier module will not cause any damage to the structures of the existing main rotor and exciter rotor or require additional modifications. By closely integrating the installation part 301A of the rectifier module with the balance ring, the two functions of balancing and rectifying are integrated, which not only simplifies the internal layout of the device, improves the space utilization rate, reduces the production cost, but also enhances the overall performance and operation reliability of the device.

[0081] In addition, in the embodiments of the present disclosure, since three ribs 303 are provided on the balance ring 30, the spaces between the central part, the edge part and the ribs of the balance ring 30 form arc-shaped ventilation holes 304. The areas of these ventilation holes are significantly increased compared with the traditional design, providing a larger ventilation area for the cooling system inside the device, thereby enhancing the cooling effect. Under high-temperature or high-load conditions, effective cooling is crucial for protecting components and extending the equipment life. Increasing the ventilation area can promote better air circulation, improve the heat exchange efficiency, take away more heat, reduce the temperature of the components, and ensure that the device operates in the best state.

[0082] In addition, the design of the ribs 303 and the ventilation holes 304 also takes into account space utilization and assembly convenience. While ensuring the structural strength and cooling effect, their layout and size design enable the balance rectifier disk to be better compatible with other motor components, simplify the assembly process, reduce the production cost, and are also convenient for maintenance and inspection.

[0083] Therefore, by providing three ribs 303 on the balance ring 30, not only the mechanical stability of the balance ring is enhanced, ensuring the safe operation of the device under high-speed rotation, but also the cooling efficiency is significantly improved by increasing the area of the arc-shaped ventilation holes 304, the operating temperature is reduced, the noise is reduced, and at the same time, the space utilization and assembly convenience are optimized.

[0084] Optionally, the balance ring 30 may further include heat dissipation ribs 306 provided at positions corresponding to the rectifier module to enhance the heat dissipation performance of the balance ring and the rectifier module.

[0085] In addition, as an example, such as Figure 3, the balanced rectifier assembly 300 may further include: an annular first DC disk 32 coaxially mounted on the rotating shaft A and disposed at a position spaced apart from the balance ring 30 along the rotating shaft A on the surface side of the balance ring 30 opposite to the main rotor 10; an annular second DC disk 33 coaxially mounted on the rotating shaft A and disposed between the first DC disk 32 and the balance ring 30, wherein the second DC disk 33 is spaced apart from the first DC disk 32 and the balance ring 30; and a first bridge-shaped connection bracket 34 spanning between the rectifier module 31 and the first DC disk 32, the first bridge-shaped connection bracket 34 electrically connecting the negative terminal 31B of the rectifier module 31 to the first DC disk 32; a second bridge-shaped connection bracket 35 spanning between the rectifier module 31 and the second DC disk 33, the second bridge-shaped connection bracket 35 electrically connecting the positive terminal 31C of the rectifier module 31 to the second DC disk 33. The first bridge-shaped connection bracket 34 and the second bridge-shaped connection bracket 35 may be made of copper material, and other conductive materials may also be used.

[0086] In the example of the present disclosure, since the three rectifier modules 31 are respectively installed at the three installation sites 301, three first bridge-shaped connection brackets 34 are provided, each first bridge-shaped connection bracket 34 spanning between the corresponding rectifier module 31 and the first DC disk 32, and three second bridge-shaped connection brackets 35 are provided, each second bridge-shaped connection bracket 35 spanning between the corresponding rectifier module 31 and the second DC disk 33 to achieve the electrical connection between the corresponding rectifier module and the first DC disk and the second DC disk. However, the present disclosure is not limited to this example, and the corresponding number of first bridge-shaped connection brackets and second bridge-shaped connection brackets may be set according to the number of rectifier modules to be connected.

[0087] As an example, as Figure 2 shown, the first bridge-shaped connection bracket 34 may include: a first bracket body 340 spanning the rectifier module 31 and the first DC disk 32; a first branch arm 341 extending perpendicularly from the first bracket body 340 to physically and electrically connect to the negative terminal 31B of the rectifier module 31; and a second branch arm 342 extending perpendicularly from the first bracket body 340 to physically and electrically connect to the first DC disk 32.

[0088] As an example, as Figure 3 shown, the second bridge-shaped connection bracket 35 may include: a second bracket body 350 spanning the rectifier module 31 and the second DC disk 33; a first branch arm 351 extending perpendicularly from the second bracket body 350 to physically and electrically connect to the positive terminal 31C of the rectifier module 31; and a second branch arm 352 extending perpendicularly from the second bracket body 350 to physically and electrically connect to the second DC disk 33.

[0089] In an embodiment of the present disclosure, as Figure 3 shown, the main rotor cable 10A led out from the main rotor 10 connects the main rotor 10 to the first DC panel 32 and to the second DC panel 33 (not shown in the figure), and is axially arranged along the outer surface of the rotating shaft A and fixed to the outer surface of the rotating shaft A by a cable fixture 10B. As an example, the cable fixture 10B can be a wire clamp, but the present disclosure is not limited to this embodiment, and any fixture that can fix the cable to the outer surface of the rotating shaft can be used as the cable fixture 10B, such as a cable fixing ring, a cable tie, etc.

[0090] In an embodiment of the present disclosure, since the rectifier module is integrally installed on the balance rectifying panel, the main rotor cable 10A can be axially arranged along the outer surface of the rotating shaft A and the exciter rotor cable can be directly connected to the rectifier module. Thus, the rotating shaft A can be a solid shaft, and there is no need to pass the main rotor cable through the shaft hole and cure the main rotor cable by pouring glue into the shaft hole, thereby reducing the production cost and enhancing the reliability of the rotating rectification. As an alternative embodiment, the rotating shaft A can be a hollow shaft. In the embodiment where the rotating shaft is a hollow shaft, the main rotor cable 10A still axially arranges along the outer surface of the rotating shaft A. However, during the process of testing the motor rotor device to measure the rotor parameters before the motor rotor device is put into use, the measuring cable connected to the main rotor cable can be led out from the hollow shaft to the shaft end of the non-driving end of the rotating shaft by passing the measuring cable through the shaft hole and curing the measuring cable by pouring glue into the shaft hole, and the measuring cable can be connected to the slip ring provided on this shaft end to measure the rotor parameters. After the test of the motor rotor device is completed, the measuring cable and the slip ring can be removed to put the motor rotor device into use. In the example, the measuring cable can be connected to the main rotor cable on the first rectifying panel and the second rectifying panel.

[0091] In an embodiment of the present disclosure, the negative terminal of the rectifier module is electrically connected to the first DC panel through the first bridge-shaped connection bracket 34, and is connected to the first DC panel through the main rotor cable 10A, so that the direct current rectified and output by the rectifier module can be supplied to the coil of the main rotor through the main rotor cable 10A, thereby generating magnetic field energy and ensuring the stator voltage. In addition, since the positive terminal of the rectifier module is electrically connected to the second DC panel through the second bridge-shaped connection bracket 34 and the main rotor is connected to the second DC panel through the main rotor cable 10A, a circuit loop is formed, and thus stable power can be provided.

[0092] This dual-bridge bracket connection scheme not only effectively separates the anode and cathode of direct current, avoiding the risk of electrical short circuit, but also ensures the balanced flow of current in the circuit, enhancing the safety and reliability of the electrical system. Through the synergistic effect of the first and second bridge-type connection brackets, not only the efficient transmission of direct current is achieved, but also the integrity of the circuit loop is ensured, achieving smooth operation of the device.

[0093] As an embodiment of the present disclosure, the first DC disk 32, the second DC disk 33 and the balance ring 30 can be fixed together by a plurality of insulating fasteners 36, and the plurality of insulating fasteners 36 are positioned at the position where the mounting portion 301A is not covered by the rectifier module 31. In addition, the plurality of insulating fasteners 36 can be evenly distributed along the circumference of the first DC disk 32, the second DC disk 33 and the balance ring 30. In this way, the plurality of insulating fasteners 36 fix the first and second DC disks on the balance ring, thereby preventing the first and second DC disks from loosening. On the other hand, the anode and cathode of the DC power can be isolated to ensure reliable electrical operation.

[0094] In the embodiment of the present disclosure, the insulating fastener 36 may be in the form of an insulating tube disposed outside a bolt, but the present disclosure is not limited to this embodiment, and for example, an insulating screw, an insulating bolt, etc. may be used.

[0095] As an example, the balanced rectifier assembly 300 may further include a varistor 37 disposed on the surface of the balancing ring 30 opposite to the exciter rotor 20 corresponding to the rectifier module 31, and the varistor 37 may be connected in parallel with the rectifier module 31. By connecting the varistor in parallel with the anode terminal and the cathode terminal of the rectifier module, overvoltage generated during operation can be prevented.

[0096] In the embodiment of the present disclosure, the rectifier module and the varistor as consumable parts, such as Figure 2 As shown, the rectifier module and the varistor are placed in a position that is easy to install and remove, so that the user can directly operate from the non-shaft extension end, realizing the convenience of disassembly, assembly and maintenance.

[0097] In the motor rotor device disclosed in the present invention, the alternating current generated by the exciter rotor is converted into direct current through three rectifier modules. The direct current output from the three rectifier modules is provided to the main rotor coil through the main rotor cable via the first bridge-type connection connected to the cathode terminal of the rectifier module and the first DC disk to generate magnetic field energy, thereby ensuring the stator voltage. In addition, it is connected to the anode terminal of the rectifier module through the second bridge-type connection bracket, thereby forming a stable current loop.

[0098] According to an embodiment of the present disclosure, a motor is also provided, which adopts the motor rotor device of the present disclosure and correspondingly has the technical advantages of the motor rotor device of the present disclosure.

[0099] In the above embodiments of the present disclosure, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] The motor rotor device disclosed in the present invention has at least the following advantages:

[0101] 1. Integrated rectification and balancing functions on the balanced rectifier disc.

[0102] 2. Using a rectifier module with two diodes packaged and cured instead of a single diode reduces the number of connection contacts. The module is placed on top of the balanced rectifier disk to facilitate heat dissipation, and the exciter rotor cable can be directly connected to the rectifier module. In addition, the rectifier assembly is integrated on the balanced rectifier disk so that the main rotor cable can be arranged on the outer surface of the rotating shaft. Therefore, the structure of the present disclosure does not need to use the method of using the cable through the shaft hole and the cable curing method of the shaft hole, thereby reducing production costs and enhancing the reliability of rotary rectification.

[0103] 3. The rectifier module and varistor are consumable parts and are placed in a position that is easy to install and remove, so that users can directly operate them from the non-shaft extension end.

[0104] In the several embodiments provided in the present disclosure, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. The above are only preferred implementations of the present disclosure. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present disclosure, and these improvements and modifications should also be regarded as the protection scope of the present disclosure.

Claims

1. A motor rotor device, characterized in that, The motor rotor device includes: A rotating shaft (A); A main rotor (10) coaxially mounted on the rotating shaft (A); An exciter rotor (20) coaxially mounted on the rotating shaft (A) at a position spaced apart from the main rotor (10) along the rotating shaft (A); and A balance rectifier assembly (300) including a balance rectifier disk coaxially mounted on the rotating shaft (A) and arranged axially on the rotating shaft (A) between the main rotor (10) and the exciter rotor (20). A rectifier assembly is provided on the balance rectifier disk, and the rectifier assembly is connected to the three-phase lead-out wires of the exciter rotor (20).

2. The motor rotor device according to claim 1, characterized in that, The balance rectifier disk includes: A balance ring (30), the edge portion (301) of the balance ring (30) having a plurality of mounting portions (301A) uniformly distributed along the outer circumference of the balance ring (30); and The rectifier assembly includes a plurality of rectifier modules (31) assembled at the plurality of mounting portions (301A). Among them, the three-phase lead-out wires of the exciter rotor (20) are connected to the lead-out connection terminals (31A) of the plurality of rectifier modules (31).

3. The motor rotor device according to claim 2, wherein: The edge portion (301) of the balance ring (30) has three mounting portions (301A) uniformly distributed along the outer circumference of the balance ring (30); and The rectifier assembly includes three rectifier modules (31) respectively assembled at the three mounting portions (301A).

4. The motor rotor device according to claim 2, characterized in that, Each rectifier module (31) includes two rectifier diodes connected in series, and the two rectifier diodes of each rectifier module (31) are encapsulated and solidified into one body by an insulating material.

5. The motor rotor device according to claim 2 or 3, characterized in that, The balance ring (30) includes: A central portion (302) having an annular shape, and the balance ring (30) is sleeved on the rotating shaft (A) through the central portion (302); The edge portion (301) having an annular shape, located on the outer circumference of the balance ring (30) and spaced apart from the central portion (302); A plurality of ribs (303) provided between the central portion (302) and the edge portion (301) and connecting the central portion (302) and the edge portion (301); A plurality of ventilation holes (304), each ventilation hole (304) being jointly defined by adjacent ribs (303) and the sections of the central portion (302) and the edge portion (301) located between the adjacent ribs (303), and A plurality of balance holes (305) arranged along the circumference of the balance ring (30) on the edge portion (301), and each balance hole (305) can be provided with a detachable balance member.

6. The motor rotor device according to claim 5, characterized in that The edge portion (301) includes a section portion (301B) located between adjacent ribs (303), wherein the plurality of balance holes (305) are arranged on the section portion (301B) of the edge portion (301), each mounting portion (301A) is provided at a position where the edge portion (301) is connected to the rib (303) and is located between adjacent section portions (301B), and each mounting portion (301A) is formed as a groove recessed from the edge portion (301) towards the rib (303).

7. The motor rotor device according to claim 2 or 3, characterized in that, The balance rectifying assembly (300) further includes: An annular first DC disk (32), coaxially mounted on the rotating shaft (A), and disposed at a position spaced apart from the balance ring (30) along the rotating shaft (A) on the surface side of the balance ring (30) opposite to the main rotor (10); An annular second DC disk (33), coaxially mounted on the rotating shaft (A), and disposed between the first DC disk (32) and the balance ring (30), wherein the second DC disk (33) is spaced apart from the first DC disk (32) and the balance ring (30); and A first bridge-shaped connecting bracket (34), spanning between the rectifier module (31) and the first DC disk (32), and the first bridge-shaped connecting bracket (34) electrically connects the negative terminal (31B) of the rectifier module (31) to the first DC disk (32); A second bridge-shaped connecting bracket (35), spanning between the rectifier module (31) and the second DC disk (33), and the second bridge-shaped connecting bracket (35) electrically connects the positive terminal (31C) of the rectifier module (31) to the second DC disk (33).

8. The motor rotor device according to claim 7, wherein The first bridge-shaped connecting bracket (34) includes: A first bracket body (340), spanning across the rectifier module (31) and the first DC disk (32); A first branch arm (341), extending perpendicularly from the first bracket body (340) to physically and electrically connect to the negative terminal (31B) of the rectifier module (31); and A second branch arm (342), extending perpendicularly from the first bracket body (340) to physically and electrically connect to the first DC disk (32), The second bridge-shaped connecting bracket (35) includes: A second bracket body (350), spanning across the rectifier module (31) and the second DC disk (33); A first branch arm (351), extending perpendicularly from the second bracket body (350) to physically and electrically connect to the positive terminal (31C) of the rectifier module (31); and A second branch arm (352), extending perpendicularly from the second bracket body (350) to physically and electrically connect to the second DC disk (33).

9. The motor rotor device according to claim 7, characterized in that, It further includes a main rotor cable (10A) that connects the main rotor (10) to the first DC panel (32) and the second DC panel (33), wherein the main rotor cable (10A) is axially arranged along the outer surface of the rotating shaft (A) and fixed to the outer surface of the rotating shaft (A) by a cable fixture (10B).

10. The motor rotor device according to claim 7, characterized in that, The first DC panel (32), the second DC panel (33) and the balance ring (30) are fixed to each other by a plurality of insulating fasteners (36), and the plurality of insulating fasteners (36) are positioned at locations on the mounting site (301A) not covered by the rectifier module (31).

11. The motor rotor device according to claim 2, characterized in that, The balance rectification assembly (300) further includes a varistor (37) correspondingly arranged on the surface of the balance ring (30) opposite to the exciter rotor (20) corresponding to the rectifier module (31), and the varistor (37) is connected in parallel with the rectifier module (31).

12. The motor rotor device according to claim 1, wherein, The rotating shaft (A) is a solid shaft or a hollow shaft.

13. Electric motor, characterized in that, It includes a motor rotor device according to any one of claims 1-12.

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