Rotary rectifier

Abstract

The utility model relates to a rotary rectifier, and belongs to the technical field of motor control, the rotary rectifier comprises a rectification disc, one side of the rectification disc is provided with a plurality of diode modules and overvoltage absorption modules, the rectification disc is fixedly connected with a plurality of installation teeth uniformly distributed along the edge of the rectification disc, and an installation groove is formed between every two adjacent installation teeth. And one ends, close to the center of the rectifying disc, of the diode module and the overvoltage absorption module are inserted into the mounting grooves and are fixedly connected with the rectifying disc through bolts. The rotary rectifier has the effect of improving the applicability of the rotary rectifier to the high rotating speed.

Description

Technical Field

[0001] The present application relates to the technical field of motor control, and in particular to a rotating rectifier. Background Art

[0002] As a common component in brushless synchronous motor applications, the rotating rectifier is usually composed of multiple rotating diode power bridge arm modules and multiple rotating varistor modules installed on the rectifier disk.

[0003] A Chinese patent with publication number CN215120467U discloses a brushless synchronous motor ventilation and heat dissipation rotating rectifier, including a motor rotor, a rotating rectifier disk, a plurality of power modules with radiators and an overvoltage absorption module. The plurality of power modules are interconnected to form a rectifier circuit, and the overvoltage absorption module is connected to the output of the rectifier circuit. A center hole is provided at the center of the rotating rectifier disk for inserting into the motor rotor shaft. The rotating rectifier disk is a disk with a right-angled concave "U" shape on one side in cross section. A plurality of ventilation holes are evenly arranged around the center hole on the concave disk surface. The plurality of power modules with radiators are distributed and fixed along the periphery of the concave disk. The concave disk of the rotating rectifier disk is inserted into the motor rotor shaft and connected and fixed to the motor rotor with the concave disk facing the outer casing. The ventilation holes on the rectifier and the rotating rectifier disk are staggered, which solves the problem of excessive heating of the motor rotor coil under heavy load.

[0004] In the related art, ventilation holes are provided on the rectifier disk, and the power module and the overvoltage absorption module do not block the ventilation holes, so the rectifier disk area is large, which easily makes it difficult for the rotating rectifier to adapt to high-speed rotation, affecting the applicability of the rotating rectifier. Utility Model Content

[0005] In order to increase the applicability of a rotating rectifier to high rotation speeds, the present application provides a rotating rectifier.

[0006] The present application provides a rotary rectifier adopting the following technical solution:

[0007] A rotating rectifier comprises a rectifier disk, one side of which is provided with a plurality of diode modules and an overvoltage absorption module, the rectifier disk is fixedly connected with a plurality of mounting teeth evenly distributed along the edge of the rectifier disk, and mounting grooves are formed between adjacent mounting teeth, and one end of the diode module and the overvoltage absorption module close to the center of the rectifier disk are both inserted into the mounting grooves and fixedly connected to the rectifier disk by bolts.

[0008] By adopting the above technical solution, the diode modules and the overvoltage absorption modules are evenly distributed on the rectifier disk through the installation grooves, thereby saving space for opening ventilation holes and reducing the size of the rectifier disk, thereby reducing the centrifugal force on the diode modules and the overvoltage absorption module during high-speed rotation, thereby increasing the applicability of the rotating rectifier to high speeds.

[0009] Optionally, a mounting assembly for energizing the diode module and the overvoltage absorption module is provided on the rectifier disk.

[0010] By adopting the above technical solution, the diode module and the overvoltage absorption module are both installed on the rectifier disk through the installation component, which improves the installation stability of the diode module and the overvoltage absorption module, thereby increasing the applicability of the rotating rectifier to high speeds, and the installation component energizes the diode module and the overvoltage absorption module, so that the diode module forms a rectification circuit, and the overvoltage absorption module performs overvoltage protection on the rotating rectifier, thereby extending the service life of the rotating rectifier.

[0011] Optionally, the width of the mounting tooth at one end away from the center of the rectifier disk is set to a tip that gradually decreases in the direction away from the center of the rectifier disk, and both sides of the diode module and the overvoltage absorption module are fixedly connected to the inclined side walls of the mounting teeth by bolts, and the mounting teeth on both sides of the diode module close to the diode module are perpendicular to the line connecting the diode module and the center of the rectifier disk, and the mounting teeth on both sides of the overvoltage absorption module close to the overvoltage absorption module are perpendicular to the line connecting the overvoltage absorption module and the center of the rectifier disk.

[0012] By adopting the above technical solution, the inclined surfaces on both sides of the mounting tooth tip ensure that during the high-speed rotation of the rotating rectifier, the centrifugal forces exerted on the diode module and the overvoltage absorption module are perpendicular to the inclined surfaces on both sides of the mounting tooth tip, thereby reducing the possibility of the diode module and the overvoltage absorption module being separated from the mounting teeth due to the centrifugal force, and further increasing the applicability of the rotating rectifier to high speeds.

[0013] Optionally, two overvoltage absorption modules are provided and are arranged opposite to each other along the diameter direction of the rectifier disk, and the diode modules are symmetrically and evenly distributed on both sides of the line between the overvoltage absorption modules.

[0014] By adopting the above technical solution, the overvoltage absorption module and the diode module are evenly and symmetrically distributed on the rectifier disk, thereby reducing the possibility of damage to the rectifier disk due to uneven weight distribution during rotation and extending the service life of the rectifier disk.

[0015] Optionally, the center of the rectifier disk is hollow, and a plug-in slot for connecting with a motor shaft key is provided on the inner side wall of the rectifier disk.

[0016] By adopting the above technical solution, the plug-in groove on the inner wall of the rectifier disk limits the motor shaft, thereby improving the stability of the connection between the motor shaft and the rectifier disk.

[0017] Optionally, a heat sink is installed at one end of the diode module and the overvoltage absorption module away from the center of the rectifier disk, and a plurality of heat dissipation teeth are fixedly connected to one end of the heat sink away from the center of the rectifier disk.

[0018] By adopting the above technical solution, the heat dissipation teeth increase the heat dissipation area, and the heat dissipation teeth are located on the side of the radiator away from the center of the rectifier disk. When the rectifier disk rotates, the air around the rectifier disk flows under the rotation of the rectifier disk, thereby facilitating cooling of the heat dissipation teeth and further improving the heat dissipation efficiency.

[0019] Optionally, the mounting assembly includes a positive bus conductive ring and a negative bus conductive ring which are arranged on one side of the rectifier disk close to the diode module and along the width direction of the rectifier disk, the positive bus conductive ring and the negative bus conductive ring are fixedly connected to the rectifier disk by bolts, the diode module includes two reverse-parallel diodes, one end of one of the diodes away from the connection end is connected to the positive bus conductive ring, and the other end of the diode away from the connection end is connected to the negative bus conductive ring, the overvoltage absorption module includes a varistor whose one side is in contact with the corresponding heat sink, the heat sink is connected to the positive bus conductive ring, and the other end of the varistor is connected to the negative bus conductive ring.

[0020] By adopting the above technical solution, the positive and negative busbars are both set as conductive rings and connected to the rectifier disk by bolts, which is convenient for fixation. The positive busbar conductive ring and the negative busbar conductive ring connect the diode module to form a rectifier circuit, which is convenient for energizing the diode module.

[0021] Optionally, the heat sink, the rectifier disk, the positive busbar conductive ring and the negative busbar conductive ring are all provided with insulating blocks sleeved on bolts.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. The diode modules and overvoltage absorption modules are evenly distributed on the rectifier disk through the installation grooves, thereby saving space for opening ventilation holes, reducing the size of the rectifier disk, and reducing the centrifugal force on the diode modules and overvoltage absorption modules during high-speed rotation, thereby increasing the applicability of the rotating rectifier to high speeds;

[0024] 2. The inclined surfaces on both sides of the mounting tooth tip make the centrifugal forces on the diode module and the overvoltage absorption module perpendicular to the inclined surfaces on both sides of the mounting tooth tip during high-speed rotation of the rotary rectifier, thereby reducing the possibility of the diode module and the overvoltage absorption module being separated from the mounting teeth due to the centrifugal force, and further increasing the applicability of the rotary rectifier to high speeds;

[0025] 3. The heat dissipation teeth increase the heat dissipation area, and the heat dissipation teeth are located on the side of the radiator away from the center of the rectifier disk. When the rectifier disk rotates, the air around the rectifier disk flows under the rotation of the rectifier disk, thereby facilitating the cooling of the heat dissipation teeth and further improving the heat dissipation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the rotating rectifier in the embodiment of the present application.

[0027] Figure 2 It is a structural schematic diagram showing the position relationship between the rectifier disc and the mounting teeth in the embodiment of the present application.

[0028] Figure 3 It is a structural schematic diagram reflecting the positional relationship between the diode module and the mounting assembly in the embodiment of the present application.

[0029] Figure 4 It is a structural diagram showing the positional relationship between the overpressure absorption module and the installation assembly in the embodiment of the present application.

[0030] Explanation of the accompanying drawings: 1. Rectifier disk; 11. Plug-in slot; 12. Mounting tooth; 13. Mounting slot; 2. Diode module; 21. Diode; 3. Overvoltage absorption module; 31. Varistor; 4. Heat sink; 41. Reinforcement rib; 5. Mounting assembly; 51. Positive busbar conductive ring; 52. Negative busbar conductive ring; 53. First mounting plate; 54. Second mounting plate; 55. First connecting plate; 56. Second connecting plate; 57. Insulating block. DETAILED DESCRIPTION

[0031] The present application is further described in detail below in conjunction with the accompanying drawings.

[0032] The present application embodiment discloses a rotating rectifier. Figure 1 and Figure 2 A rotating rectifier includes a circular rectifier disc 1, and a plug-in slot 11 for adapting to a motor shaft is provided on the inner side wall of the rectifier disc 1. The rectifier disc 1 is key-connected to the motor shaft through the plug-in slot 11 and the hollow in the middle. A plurality of mounting teeth 12 evenly distributed along the circumference of the center of the rectifier disc 1 are fixedly connected to the outer side wall of the rectifier disc 1. In the embodiment of the present application, eight mounting teeth 12 are provided, and mounting slots 13 are formed between adjacent mounting teeth 12.

[0033] The rectifier disk 1 is provided with a plurality of diode modules 2 and overvoltage absorption modules 3. In the embodiment of the present application, six diode modules 2 are provided, and two overvoltage absorption modules 3 are provided. The overvoltage absorption modules 3 are symmetrically arranged on both sides of the rectifier disk 1 and plugged into the mounting grooves 13. The diode modules 2 are symmetrically arranged on both sides of the connection between the overvoltage absorption modules 3, and the diode modules 2 are all plugged into the mounting grooves 13.

[0034] Reference Figure 1 and Figure 2 , the ends of the diode module 2 and the overvoltage absorption module 3 away from the center of the rectifier disk 1 are fixedly connected with the heat sink 4, and the width of the end of the mounting tooth 12 away from the center of the rectifier disk 1 is set to a tip protruding in the direction away from the center of the rectifier disk 1. The ends of the heat sink 4 are all abutted against the side wall of the end of the mounting tooth 12 away from the center of the rectifier disk 1 and are fixedly connected to the mounting tooth 12 by bolts. The tips of the mounting teeth 12 located on both sides of the diode module 2 and close to the corresponding side of the diode module 2 are perpendicular to the line connecting the diode module 2 and the center of the rectifier disk 1, and the tips of the mounting teeth 12 located on both sides of the overvoltage absorption module 3 and close to the corresponding side of the overvoltage absorption module 3 are perpendicular to the line connecting the overvoltage absorption module 3 and the center of the rectifier disk 1.

[0035] Reference Figure 1 and Figure 3 A plurality of heat dissipation teeth (not shown in the figure) parallel to the rectifier disk 1 are fixedly connected to the side of the heat sink 4 away from the center of the rectifier disk 1, and the heat dissipation teeth are evenly distributed along the width direction of the heat sink 4. Two reinforcing ribs 41 parallel to the heat dissipation teeth are fixedly connected to both ends of the side of the heat sink 4 close to the heat dissipation teeth. The rectifier disk 1 is provided with a mounting assembly 5 for energizing the diode module 2 and the overvoltage absorption module 3.

[0036] The diode module 2 and the overvoltage absorption module 3 are both inserted into the installation groove 13 and are evenly distributed on the rectifier disk 1 through bolts and the installation assembly 5. At this time, the installation assembly 5 energizes the diode module 2 and the overvoltage absorption module 3, so that the diode module 2 forms a rectifier circuit, and the overvoltage absorption module 3 performs overvoltage protection on the rotating rectifier. The size of the rectifier disk 1 is reduced, and the centrifugal force on the diode module 2 and the overvoltage absorption module 3 during high-speed rotation is reduced, thereby increasing the applicability of the rotating rectifier to high speeds.

[0037] The inclined surfaces on both sides of the tip of the mounting tooth 12 ensure that during the high-speed rotation of the rotating rectifier, the centrifugal forces exerted on the diode module 2 and the overvoltage absorption module 3 are perpendicular to the inclined surfaces on both sides of the tip of the mounting tooth 12, thereby reducing the possibility of the diode module 2 and the overvoltage absorption module 3 being separated from the mounting teeth 12 due to the centrifugal force; the plug-in slot 11 on the inner wall of the rectifier disk 1 limits the motor shaft, the heat dissipation teeth increase the heat dissipation area, and the heat dissipation teeth are located on the side of the radiator 4 away from the center of the rectifier disk 1. When the rectifier disk 1 rotates, the air around the rectifier disk 1 flows due to the rotation of the rectifier disk 1, which is convenient for cooling the heat dissipation teeth.

[0038] The overvoltage absorption module 3 and the diode module 2 are evenly and symmetrically distributed on the rectifier disc 1, thereby reducing the possibility of damage to the rectifier disc 1 due to uneven weight distribution during rotation.

[0039] Reference Figure 3 and Figure 4The mounting assembly 5 includes a positive busbar conductive ring 51 and a negative busbar conductive ring 52 located on one side of the rectifier disk 1 and parallel to the rectifier disk 1. The positive busbar conductive ring 51 is located on the side of the negative busbar conductive ring 52 away from the rectifier disk 1. The diode module 2 includes two diodes 21 facing the center of the rectifier, wherein one end of the anode of one of the diodes 21 contacts the corresponding side wall of the heat sink 4, and the other end is fixedly connected to a first mounting plate 53, and one end of the cathode of the other diode 21 contacts the corresponding side wall of the heat sink 4, and the other end is fixedly connected to a second mounting plate 54.

[0040] One end of the two diodes 21 close to the radiator 4 is electrically connected through the side wall of the radiator 4, the first mounting plate 53 contacts the positive bus conductive ring 51 and is fixedly connected to the positive bus conductive ring 51 through bolts, and the second mounting plate 54 contacts the negative bus conductive ring 52 and is fixedly connected to the negative bus conductive ring 52 through bolts.

[0041] The overvoltage absorption module 3 includes a varistor 31 with one end abutting against the side wall of the corresponding heat sink 4, a first connecting plate 55 is fixedly connected to the corresponding heat sink 4 by bolts, and a second connecting plate 56 is fixedly connected to one end of the varistor 31 away from the corresponding heat sink 4. The first connecting plate 55 contacts the positive busbar conductive ring 51 and is fixedly connected to the positive busbar conductive ring 51 by bolts, the second connecting plate 56 contacts the negative busbar conductive ring 52 and is fixedly connected to the negative busbar conductive ring 52 by bolts, and the heat sink 4, the rectifier disk 1, the positive busbar conductive ring 51 and the negative busbar conductive ring 52 are all fixedly connected with an insulating block 57 for the bolts to pass through.

[0042] Both the positive and negative busbars are configured in the shape of conductive rings and are connected to the rectifier disk 1 by bolts for easy fixation, and the positive busbar conductive ring 51 and the negative busbar conductive ring 52 connect the diode module 2 via the first mounting plate 53, the diode 21 and the second mounting plate 54 to form a rectifier circuit, which is convenient for energizing the diode module 2, and energizing the overvoltage absorption module 3 via the first connecting plate 55, the varistor 31 and the second connecting plate 56, which is convenient for overvoltage protection of the rotating rectifier.

[0043] The implementation principle of a rotating rectifier in an embodiment of the present application is as follows: the diode module 2 and the overvoltage absorption module 3 are both inserted into the installation groove 13, and are installed on the rectifier disk 1 by bolts, the positive bus conductive ring 51 and the negative bus conductive ring 52. At this time, the positive bus conductive ring 51 and the negative bus conductive ring 52 energize the diode module 2 and the overvoltage absorption module 3, so that the diode module 2 forms a rectification circuit, and the overvoltage absorption module 3 performs overvoltage protection on the rotating rectifier. The size of the rectifier disk 1 is reduced, and the centrifugal force on the diode module 2 and the overvoltage absorption module 3 during high-speed rotation is reduced, thereby increasing the applicability of the rotating rectifier to high speeds.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A rotary rectifier, characterized in that: The invention comprises a rectifier disk (1), wherein one side of the rectifier disk (1) is provided with a plurality of diode modules (2) and an overvoltage absorption module (3), the rectifier disk (1) is fixedly connected with a plurality of mounting teeth (12) evenly distributed along the edge of the rectifier disk (1), and mounting grooves (13) are formed between adjacent mounting teeth (12), and the ends of the diode modules (2) and the overvoltage absorption modules (3) close to the center of the rectifier disk (1) are both inserted into the mounting grooves (13) and fixedly connected to the rectifier disk (1) by bolts.

2. A rotary rectifier according to claim 1, characterized in that: The rectifier disk (1) is provided with a mounting assembly (5) for energizing the diode module (2) and the overvoltage absorption module (3).

3. A rotary rectifier according to claim 2, characterized in that: The width of the mounting teeth (12) at one end away from the center of the rectifier disk (1) is set to be a tip that gradually decreases in a direction away from the center of the rectifier disk (1); both sides of the diode module (2) and the overvoltage absorption module (3) are fixedly connected to the inclined side walls of the mounting teeth (12) by bolts; the sides of the mounting teeth (12) on both sides of the diode module (2) close to the diode module (2) are perpendicular to the line connecting the diode module (2) and the center of the rectifier disk (1); and the sides of the mounting teeth (12) on both sides of the overvoltage absorption module (3) close to the overvoltage absorption module (3) are perpendicular to the line connecting the overvoltage absorption module (3) and the center of the rectifier disk (1).

4. A rotary rectifier according to claim 3, characterized in that: The overvoltage absorption modules (3) are arranged in two and are arranged opposite to each other along the diameter direction of the rectifier disk (1), and the diode modules (2) are symmetrically and evenly distributed on both sides of the line connecting the overvoltage absorption modules (3).

5. A rotary rectifier according to claim 4, characterized in that: The center of the rectifier disc (1) is hollow, and an inserting slot (11) for connecting with a motor shaft key is provided on the inner side wall of the rectifier disc (1).

6. A rotary rectifier according to claim 5, characterized in that: A heat sink (4) is installed at one end of the diode module (2) and the overvoltage absorption module (3) away from the center of the rectifier disk (1); and a plurality of heat dissipation teeth are fixedly connected to one end of the heat sink (4) away from the center of the rectifier disk (1).

7. A rotary rectifier according to claim 6, characterized in that: The mounting assembly (5) comprises a positive busbar conductive ring (51) and a negative busbar conductive ring (52) which are arranged on one side of the rectifier disk (1) close to the diode module (2) and arranged along the width direction of the rectifier disk (1); the positive busbar conductive ring (51) and the negative busbar conductive ring (52) are both fixedly connected to the rectifier disk (1) by bolts; the diode module (2) comprises two reverse parallel diodes (21); one end of one of the diodes (21) away from the connection end is connected to the positive busbar conductive ring (51); and the other end of the other of the diodes (21) away from the connection end is connected to the negative busbar conductive ring (52); the overvoltage absorption module (3) comprises a varistor (31) one side of which contacts the corresponding heat sink (4); the heat sink (4) is connected to the positive busbar conductive ring (51); and the other end of the varistor (31) is connected to the negative busbar conductive ring (52).

8. A rotary rectifier according to claim 7, characterized in that: The heat sink (4), the rectifier disk (1), the positive busbar conductive ring (51) and the negative busbar conductive ring (52) are all provided with insulating blocks (57) sleeved on bolts.

Images