Three-phase bridge rectifier

Abstract

The invention relates to the technical field of photovoltaic system rectification, in particular to a three-phase bridge rectifier. The technical problems of overheat and burnout of elements and unstable current fluctuation caused by sudden change of current are solved. According to the technical scheme, the electric connector comprises a shell and further comprises a first annular terminal, an end cover, a first sleeve and the like, a plurality of positioning holes are formed in the top of the shell, the first annular terminal is arranged at the bottom of the shell in a mirror image distribution mode, the end cover is arranged at one end of the first annular terminal, and the first sleeve is arranged on the end cover in the mirror image distribution mode. By arranging the conducting rings, when high-voltage direct current flows to the two conducting rings, the two conducting rings can store charges, and the conducting rings can adjust the absorbed current and voltage according to the change condition of the high-voltage direct current, so that the high-voltage direct current is always in a relatively stable state, the current and voltage smoothness of the high-voltage direct current is ensured, and the service life of the high-voltage direct current is prolonged. The DC circuit and the rectifier bridge are prevented from being damaged, so that the DC circuit can work continuously and stably.

Description

Technical Field

[0001] This invention relates to the field of rectification technology, and more particularly to a three-phase bridge rectifier. Background Technology

[0002] In the photovoltaic field, a three-phase bridge rectifier is an electrical device that converts alternating current (AC) into smooth direct current (DC), providing a stable DC power supply for photovoltaic systems. At the same time, the three-phase bridge rectifier converts the high-voltage AC output from the photovoltaic panels into high-voltage DC, effectively improving power generation efficiency.

[0003] In practical applications, three-phase bridge rectifiers often experience component failure due to sudden current changes, manifesting as component overheating or even burnout. Furthermore, the high-voltage DC power after rectification leaves current and voltage fluctuations, interfering with the stable operation of subsequent DC circuits. To address this, a three-phase bridge rectifier that smooths out high-voltage DC power and sudden current changes is proposed to solve the problems of component overheating and burnout caused by sudden current changes in three-phase bridge rectifiers, as well as the current and voltage fluctuations of high-voltage DC power. Summary of the Invention

[0004] In order to overcome the disadvantages of sudden current changes causing component overheating and burnout, as well as unstable current fluctuations, the technical problem of the present invention is to provide a three-phase bridge rectifier that smooths the current and reduces harmonics in the current.

[0005] A three-phase bridge rectifier includes a housing, a first annular terminal, an end cap, a first sleeve, a stepped slide, a metal rod, a conductive ring, and a first wire. The top of the housing has several positioning holes. The first annular terminal is mirror-distributed on the top of the housing, with each annular terminal corresponding to a positioning hole on the front of the housing. The end cap is located at one end of the first annular terminal, and the first sleeve is located on the mirror-distributed end cap. The stepped slide is slidably disposed on the end cap. The metal rod is located at one end of the stepped slide, and its surface is coated with an insulating coating to render it non-conductive. The conductive ring is located at one end of the metal rod. The first wire is located between the first annular terminal and the conductive ring, allowing the current from the first annular terminal to flow through the first wire to the conductive ring, forming a capacitor structure.

[0006] To further explain, it also includes a second sleeve, which is located on one side of the conductive ring. The first wire is spirally wound around the second sleeve, and the left and right first wires have the same spiral direction.

[0007] Further explanation: It also includes a second wire, a second annular terminal and a third annular terminal. The second wire is wound around a metal rod, and one end of the second wire is fixed to a conductive ring. The second annular terminal is located on one side of the end cap and has the same shape as the first annular terminal. The other end of the second wire is fixed to the second annular terminal, and the third annular terminal is located at the bottom of the second annular terminal.

[0008] To further explain, the winding direction of the second wire is opposite to that of the first wire, so that the first and second wires can generate magnetic fields in the same direction when energized.

[0009] To further explain, it also includes an insulating ring and a nonlinear spring. The insulating ring is located on one side of the conductive ring, the nonlinear spring is located at one end of the insulating ring, and the other end of the nonlinear spring is fixedly connected to the end cap.

[0010] To further explain, it also includes a high-flux magnetic core and a high-saturation magnetic core. The high-flux magnetic core is located in the middle of the first sleeve. The high-flux magnetic core has high permeability, which can efficiently conduct magnetic flux, reduce magnetic resistance, and thus improve the magnetic field utilization rate. The high-saturation magnetic core is located on both sides of the high-flux magnetic core. The high-saturation magnetic core has a large saturation magnetic induction intensity, which can maintain low magnetic resistance and concentrate the magnetic field under the external magnetic field, avoiding performance degradation caused by magnetic saturation.

[0011] To further explain, the surface of the high-saturation magnetic core is coated with an insulating coating to prevent high-voltage current from breaking down the high-saturation magnetic core and the high-flux magnetic core, thereby avoiding short circuits in the mirror-distributed conductive rings.

[0012] Further explanation: It also includes a first check valve, a support cylinder, a circular plate, and a second check valve. The first check valve and the support cylinder are mirror images of each other and are installed on the housing. The circular plate is slidably disposed inside the support cylinder, and one side of the circular plate is fixedly connected to the stepped sliding column. The second check valve is installed on the circular plate. The housing, the support cylinder, and the circular plate form a cavity.

[0013] Further explanation: It also includes a separator, gaskets, and bolt and nut assemblies. The separator is set on the housing and separates several positioning holes on the housing. Several gaskets are located at the top of the positioning holes on the housing. Several bolt and nut assemblies pass through the gaskets and the positioning holes on the housing and are set on the housing. The bolt and nut assemblies and the gaskets correspond one-to-one. The bolt and nut assemblies on the rear side pass through and contact the first annular terminal.

[0014] To further explain, it also includes a heat sink, which is bolted to the bottom of the housing, with a certain gap between the heat sink and the housing.

[0015] The beneficial effects of this invention are as follows: 1. This invention, by setting conductive rings, allows the two conductive rings to form a capacitor structure due to their close proximity when the high-voltage direct current reaches them. This allows the conductive rings to store charge. The conductive rings absorb or release current and voltage according to the rise or fall of the high-voltage direct current and voltage, thus ensuring that the high-voltage direct current obtained by the DC circuit is always in a relatively stable state. This ensures the smoothness of the high-voltage direct current and voltage, prevents damage to the DC circuit and rectifier bridge caused by sudden changes in the high-voltage direct current, and enables the DC circuit to work continuously and stably.

[0016] 2. This invention, by setting up a first conductor and a second conductor, allows the first and second conductors, in their spiral state, to generate magnetic fields based on Ampere's law when a high-voltage direct current passes through them. These magnetic fields cause the two metal rods to move the conductive rings closer together, thereby increasing the charge storage capacity of the conductive rings. Furthermore, the nonlinear spring is stretched by the insulating ring. The greater the high-voltage direct current, the stronger the magnetic fields generated by the first and second conductors, and the closer the two conductive rings are, resulting in a greater charge storage capacity. This allows the conductive rings to dynamically adjust according to different intensities of high-voltage direct current, effectively improving their adaptability to varying intensities.

[0017] 3. By setting up a first conductor and a second conductor, the spiral-state first conductor and the second conductor will generate an induced current based on the surrounding magnetic field to suppress the changes in high voltage direct current, thereby suppressing the fluctuations of high voltage direct current and making the high voltage direct current more stable. This further ensures the smoothness of the current and voltage of high voltage direct current, prevents sudden changes in high voltage direct current from causing damage to the DC circuit and rectifier bridge, and enables the DC circuit to work continuously and stably.

[0018] 4. This invention, by setting a first one-way valve, a circular plate, and a second one-way valve, allows the circular plate to move synchronously as the metal rod reciprocates with changes in the magnetic field. The housing, support cylinder, and circular plate form a cavity. When the circular plate moves away from the first one-way valve, the cavity expands and draws air out through the first one-way valve. When the circular plate moves closer to the first one-way valve, the cavity shrinks and exhausts air into the housing. This allows the airflow to absorb the heat from the rectifier bridge and flow out along the gap between the heat sink and the housing, carrying away the heat inside the housing. This prevents the device from malfunctioning or even burning out due to overheating of the rectifier bridge, ensuring the safety of the device during rectification and improving its service life. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a half-sectional schematic diagram of the housing of the present invention; Figure 3 This is a partial cross-sectional schematic diagram of the casing of the present invention; Figure 4 This is a schematic diagram of the structure of the first sleeve of the present invention; Figure 5 This is a half-sectional schematic diagram of the first sleeve of the present invention; Figure 6 This is a partial cross-sectional schematic diagram of the first and second conductors of the present invention; Figure 7 This is a half-sectional schematic diagram of the high flux magnetic core and the high saturation magnetic core of the present invention; Figure 8This is a half-sectional schematic diagram of the support cylinder and circular plate of the present invention.

[0020] Component names and serial numbers in the diagram: 1_House, 101_Gasket, 102_Bolt and nut assembly, 2_First annular terminal, 3_End cap, 4_First sleeve, 5_Stepped slide column, 6_Metal rod, 7_Conductive ring, 9_Second sleeve, 8_First wire, 10_Second wire, 11_Second annular terminal, 12_Third annular terminal, 13_Insulating ring, 14_Nonlinear spring, 15_High flux magnetic core, 16_High saturation magnetic core, 17_First check valve, 18_Support cylinder, 19_Circular plate, 20_Second check valve, 21_Separator, 22_Heat sink. Detailed Implementation

[0021] The technical solution of the present invention will be further described below with reference to the accompanying drawings. Example

[0022] A three-phase bridge rectifier, such as Figures 1-7 As shown, the device includes a housing 1, inside which a rectifier bridge is installed. It also includes a first annular terminal 2, an end cap 3, a first sleeve 4, a stepped slide 5, a metal rod 6, a conductive ring 7, and a first wire 8. The top of the housing 1 has several positioning holes. The first annular terminals 2 are mirror-distributed on the top of the housing 1, and each first annular terminal 2 corresponds one-to-one with a positioning hole on the front side of the housing 1. The end cap 3 is located at one end of the first annular terminal 2, and the first sleeve 4 is located on the mirror-distributed end cap 3. The first sleeve 4 and the end cap 3 are coated... Metal material with an insulating coating is used to isolate the magnetic field inside the first sleeve 4 and prevent the magnetic field from interfering with the normal operation of the rectifier bridge. The stepped slide column 5 is slidably connected to the end cover 3. The metal rod 6 is set at one end of the stepped slide column 5. The surface of the metal rod 6 is coated with an insulating coating, so that the surface of the metal rod 6 loses its conductivity. The conductive ring 7 is set at one end of the metal rod 6. The first wire 8 is set between the first annular terminal 2 and the conductive ring 7, so that the current of the first annular terminal 2 can flow to the conductive ring 7 through the first wire 8 to form a capacitor structure.

[0023] like Figure 6 As shown, it also includes a second sleeve 9, which is disposed on one side of the conductive ring 7. The first wire 8 is spirally wound on the second sleeve 9, and the left and right first wires 8 have the same spiral direction. When the first wire 8 is energized, the first wire 8 is used to generate an electromagnetic field to drive the conductive ring 7 to move.

[0024] like Figures 1-7As shown, it also includes a second wire 10, a second annular terminal 11, and a third annular terminal 12. The second wire 10 is wound around the metal rod 6, and one end of the second wire 10 is fixed to the conductive ring 7. The winding direction of the second wire 10 is opposite to that of the first wire 8, so that the first wire 8 and the second wire 10 can generate magnetic fields in the same direction when energized. The second annular terminal 11 is disposed on one side of the end cap 3. The second annular terminal 11 has the same shape as the first annular terminal 2. The other end of the second wire 10 is fixed to the second annular terminal 11. The third annular terminal 12 is fastened to the bottom of the second annular terminal 11 by fastening bolts and nuts.

[0025] like Figures 5-7 As shown, it also includes an insulating ring 13 and a nonlinear spring 14. The insulating ring 13 is disposed on one side of the conductive ring 7, and the nonlinear spring 14 is disposed at one end of the insulating ring 13. The other end of the nonlinear spring 14 is fixedly connected to the end cap 3. The square of the change in length of the nonlinear spring 14 is proportional to the elastic force of the nonlinear spring 14.

[0026] like Figures 5-7 As shown, it also includes a high-flux magnetic core 15 and a high-saturation magnetic core 16. The high-flux magnetic core 15 is located in the middle of the inside of the first sleeve 4. The high-flux magnetic core 15 has high magnetic permeability, which can efficiently conduct magnetic flux, reduce magnetic resistance, and thus improve the magnetic field utilization rate. The high-saturation magnetic core 16 is located on both sides of the high-flux magnetic core 15. The high-saturation magnetic core 16 has a large saturation magnetic induction intensity, which can maintain a low magnetic resistance and concentrate the magnetic field under an external magnetic field, avoiding performance degradation caused by magnetic saturation. In addition, the surface of the high-saturation magnetic core 16 is coated with an insulating coating to prevent high-voltage current from breaking down the high-saturation magnetic core 16 and the high-flux magnetic core 15, thereby preventing short circuits of the mirror-distributed conductive rings 7.

[0027] like Figures 1-3 As shown, it also includes a separator 21, gaskets 101, and bolt and nut assembly 102. The separator 21 is disposed on the housing 1 and separates several positioning holes on the housing 1. Several gaskets 101 are located at the top of the positioning holes of the housing 1. Several bolt and nut assemblies 102 pass through the gaskets 101 and the positioning holes of the housing 1 and are disposed on the housing 1. The bolt and nut assemblies 102 and the gaskets 101 correspond one-to-one. The bolt and nut assemblies 102 on the rear side pass through and contact the first annular terminal 2. The bolt and nut assemblies 102 are used to connect the output terminals of the external three-phase circuit and the input terminals of the DC circuit. The bolt and nut assemblies 102 on the rear side are electrically connected to the rectifier bridge inside the housing 1 through the third wire. The third annular terminal 12 is electrically connected to the rectifier bridge inside the housing 1 through the fourth wire.

[0028] Initially, the circular plate 19 is located in the middle of the support cylinder 18, and the bolt and nut assembly 102 is not yet installed on the housing 1. The operator attaches the output terminal of the three-phase circuit to the gasket 101 on the rear side of the top of the housing 1, and passes the bolts of the bolt and nut assembly 102 through the output terminal of the three-phase circuit, the gasket 101, and the positioning hole of the housing 1. Then, the operator tightens the bolts of the bolt and nut assembly 102, so that the bolts of the bolt and nut assembly 102 and the nuts lock the gasket 101 and the output terminal of the three-phase circuit. At this time, the alternating current flowing in the three-phase circuit can be transmitted to the bolt and nut assembly 102 on the rear side through the output terminal, and then transmitted to the housing 1 along the third conductor. The rectifier bridge is used to connect the three-phase circuit to the device. Then, the operator attaches the input terminal of the DC circuit to the gasket 101 on the front side of the top of the housing 1, and passes the bolts of the bolt and nut assembly 102 through the input terminal of the DC circuit, the gasket 101 and the positioning hole of the housing 1. Then, the bolts of the bolt and nut assembly 102 are tightened so that the bolts of the bolt and nut assembly 102 and the nuts lock the gasket 101 and the input terminal of the DC circuit. At this time, the DC current flowing in the DC circuit can be transmitted to the front bolt and nut assembly 102 through the input terminal, and then transmitted to the first ring terminal 2 through the bolt and nut assembly 102, thereby realizing the connection between the DC circuit and the device.

[0029] When high-voltage AC power is input to this device from the output terminals of the three-phase circuit, the high-voltage AC power is transmitted to the third conductor through the rear bolt and nut assembly 102. The third conductor then transmits the high-voltage AC power to the three-phase rectifier bridge inside the housing 1. The three-phase rectifier bridge rectifies the high-voltage AC power output from the three-phase circuit output terminals into high-voltage DC power and outputs it. The high-voltage DC power is transmitted to the third ring terminal 12 through the fourth conductor. The third ring terminal 12 transmits the high-voltage DC power to the second ring terminal 11, which then guides the high-voltage DC power to the second conductor 10. The high-voltage DC power in the second conductor 10 flows from the conductive ring 7 through the first conductor 8, and then from the first conductor 8 to the first ring terminal 2. The first ring terminal 2 then guides the high-voltage DC power through the front bolt and nut assembly 102 to the input terminals of the DC circuit, thereby realizing the rectification and output of AC power in the three-phase circuit (the aforementioned rectifier bridge, third conductor, and fourth conductor are all...). (Due to existing technology, it is not shown in the figure and will not be described in detail.) It is worth noting that when the high-voltage direct current flows to the two conductive rings 7, the two conductive rings 7 will form a capacitor structure due to their close proximity. The conductive ring 7 located at the high potential will store positive charge, and the conductive ring 7 located at the low potential will store negative charge. The process of charge storage in the conductive rings 7 will absorb the current and voltage of the high-voltage direct current. It is worth noting that after the rectifier bridge converts the high-voltage alternating current into high-voltage direct current, there will be current and voltage fluctuations in the high-voltage direct current. When the current and voltage increase, the conductive ring 7 will absorb a part of the current and voltage, and when the current and voltage decrease, the conductive ring 7 will release a part of the current and voltage. This ensures that the high-voltage direct current obtained by the DC circuit is always in a relatively stable state, thereby ensuring the smoothness of the current and voltage of the high-voltage direct current, preventing damage to the DC circuit and rectifier bridge caused by sudden changes in the high-voltage direct current, and enabling the DC circuit to work continuously and stably.

[0030] It is worth noting that when the high-voltage direct current flows through the first conductor 8 and the second conductor 10, both conductors 8 and 10, in their spiral state, will generate magnetic fields based on Ampere's law. Since the current flow direction and spiral direction of the first conductor 8 and the second conductor 10 are opposite, they will generate magnetic fields in the same direction, thus producing a relatively strong magnetic field. When this magnetic field is transmitted to the metal rod 6, it will cause the tiny magnetic regions inside the metal rod 6 to rearrange, aligning the tiny magnetic regions inside the metal rod 6 with the magnetic field outside the metal rod 6, thereby magnetizing the metal rod 6 and enhancing the surrounding magnetic field. Similarly, when this magnetic field is transmitted to one of the high-saturation magnetic cores 16, it will cause the tiny magnetic regions inside the high-saturation magnetic core 16 to rearrange, aligning the tiny magnetic regions inside the high-saturation magnetic core 16 with the magnetic field outside the high-saturation magnetic core 16. The saturated magnetic core 16 is in harmony with the external magnetic field, thus magnetizing the high-saturation magnetic core 16. The high-flux magnetic core 15 in contact with it is magnetized using the same principle. The high-flux magnetic core 15 then magnetizes another high-saturation magnetic core 16 using the same principle. The two high-saturation magnetic cores 16 attract adjacent metal rods 6, causing the metal rods 6 to move the conductive rings 7 synchronously. The two conductive rings 7 move closer to each other, increasing their charge storage capacity. This charge storage capacity is further enhanced by the nonlinear spring 14 stretched by the insulating ring 13. The greater the current of the high-voltage direct current, the stronger the magnetic field generated by the first conductor 8 and the second conductor 10, thus bringing the two conductive rings 7 closer together and increasing their charge storage capacity. This allows the conductive rings 7 to dynamically adjust according to different intensities of high-voltage direct current, effectively improving their adaptability to varying intensities of high-voltage direct current.

[0031] Furthermore, it is worth noting that when the high voltage direct current fluctuates, the first conductor 8 and the second conductor 10 in the spiral state will generate an induced current based on the surrounding magnetic field to suppress the changes in the high voltage direct current, thereby suppressing the fluctuations in the high voltage direct current and making the high voltage direct current more stable. This further ensures the smoothness of the current and voltage of the high voltage direct current, prevents sudden changes in the high voltage direct current from causing damage to the DC circuit and rectifier bridge, and enables the DC circuit to work continuously and stably. Example

[0032] Based on Example 1, such as Figure 8 As shown, it also includes a first check valve 17, a support cylinder 18, a circular plate 19, and a second check valve 20. The first check valve 17 is mirror-distributed and installed on the housing 1. The support cylinder 18 is mirror-distributed and installed on the housing 1. The circular plate 19 is slidably disposed inside the support cylinder 18, and one side of the circular plate 19 is fixedly connected to the stepped slide column 5. The second check valve 20 is installed on the circular plate 19.

[0033] like Figures 1-3As shown, it also includes a heat sink 22, which is mounted on the bottom of the housing 1 by hexagonal bolts, and there is a certain gap between the heat sink 22 and the housing 1 to facilitate airflow inside the housing 1.

[0034] It is worth noting that when the high-voltage direct current fluctuates, the fluctuation causes the intensity of the magnetic field generated by the first conductor 8 and the second conductor 10 to change synchronously. This causes the metal rod 6 to drive the conductive ring 7 to reciprocate based on the fluctuation of the magnetic field intensity. At the same time, the metal rod 6 drives the circular plate 19 to move synchronously through the stepped slide column 5, thereby causing the circular plate 19 to reciprocate within the support cylinder 18. The shell 1, the support cylinder 18, and the circular plate 19 form a cavity. When the circular plate 19 moves away from the first one-way valve 17, the cavity expands, the internal air pressure decreases, and external gas enters the cavity through the first one-way valve 17. When the circular plate 19 moves closer to the first one-way valve 17, the pressure decreases. At 7 o'clock, the cavity shrinks, and the internal air pressure increases, causing the gas inside the cavity to enter the housing 1 through the second one-way valve 20. This causes airflow inside the housing 1 and absorbs the heat generated during the operation of the rectifier bridge, accelerating the dissipation of heat from the rectifier bridge. After absorbing the heat from the rectifier bridge, the airflow transfers the heat to the heat sink 22, allowing the heat sink 22 to dissipate the heat using its surface. On the other hand, the airflow flows out along the gap between the heat sink 22 and the housing 1, carrying away the heat inside the housing 1. This prevents the device from malfunctioning or even burning out due to excessive rectifier bridge temperature, ensuring the safety of the device during rectification and improving its service life.

[0035] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A three-phase bridge rectifier, comprising a housing (1), characterized in that, It also includes a first annular terminal (2), an end cap (3), a first sleeve (4), a stepped slide (5), a metal rod (6), a conductive ring (7), and a first wire (8). The top of the housing (1) has several positioning holes. The first annular terminal (2) is mirror-distributed on the top of the housing (1), and the first annular terminal (2) corresponds one-to-one with the positioning holes on the front side of the housing (1). The end cap (3) is located at one end of the first annular terminal (2), and the first sleeve (4) is located on the mirror-distributed end cap. (3) The stepped slide column (5) is slidably mounted on the end cap (3). The metal rod (6) is mounted on one end of the stepped slide column (5). The surface of the metal rod (6) is coated with an insulating coating, so that the surface of the metal rod (6) loses its conductivity. The conductive ring (7) is mounted on one end of the metal rod (6). The first wire (8) is mounted between the first ring terminal (2) and the conductive ring (7), so that the current of the first ring terminal (2) can flow through the first wire (8) to the conductive ring (7) to form a capacitor structure.

2. A three-phase bridge rectifier according to claim 1, characterized in that, It also includes a second sleeve (9), which is located on one side of the conductive ring (7). The first wire (8) is spirally wound on the second sleeve (9), and the two first wires (8) on the left and right sides have the same spiral direction.

3. A three-phase bridge rectifier according to claim 1, characterized in that, It also includes a second wire (10), a second annular terminal (11) and a third annular terminal (12). The second wire (10) is wound around a metal rod (6). One end of the second wire (10) is fixed to a conductive ring (7). The second annular terminal (11) is located on one side of the end cap (3). The second annular terminal (11) has the same shape as the first annular terminal (2). The other end of the second wire (10) is fixed to the second annular terminal (11). The third annular terminal (12) is located at the bottom of the second annular terminal (11).

4. A three-phase bridge rectifier according to claim 2, characterized in that, The winding direction of the second conductor (10) is opposite to that of the first conductor (8), so that the first conductor (8) and the second conductor (10) can generate magnetic fields in the same direction when energized.

5. A three-phase bridge rectifier according to claim 3, characterized in that, It also includes an insulating ring (13) and a nonlinear spring (14). The insulating ring (13) is located on one side of the conductive ring (7), and the nonlinear spring (14) is located at one end of the insulating ring (13). The other end of the nonlinear spring (14) is fixedly connected to the end cap (3).

6. A three-phase bridge rectifier according to claim 1, characterized in that, It also includes a high flux magnetic core (15) and a high saturation magnetic core (16). The high flux magnetic core (15) is located in the middle of the first sleeve (4). The high flux magnetic core (15) has high permeability. The high saturation magnetic core (16) is located on both sides of the high flux magnetic core (15). The high saturation magnetic core (16) has a large saturation magnetic induction intensity and can maintain a low magnetic resistance and concentrate the magnetic field under an external magnetic field.

7. A three-phase bridge rectifier according to claim 5, characterized in that, The surface of the high saturation magnetic core (16) is coated with an insulating coating to prevent high voltage current from breaking down the high saturation magnetic core (16) and the high flux magnetic core (15), thereby avoiding short circuits in the mirror-distributed conductive rings (7).

8. A three-phase bridge rectifier according to claim 1, characterized in that, It also includes a first check valve (17), a support cylinder (18), a circular plate (19), and a second check valve (20). The first check valve (17) and the support cylinder (18) are mirror images of each other and are installed on the housing (1). The circular plate (19) is slidably disposed inside the support cylinder (18), and one side of the circular plate (19) is fixedly connected to the stepped slide column (5). The second check valve (20) is installed on the circular plate (19). The housing (1), the support cylinder (18), and the circular plate (19) form a cavity.

9. A three-phase bridge rectifier according to claim 1, characterized in that, It also includes a separator (21), a gasket (101) and a bolt and nut assembly (102). The separator (21) is set on the housing (1). The separator (21) separates several positioning holes on the housing (1). Several gaskets (101) are located at the top of the positioning holes of the housing (1). Several bolt and nut assemblies (102) pass through the gaskets (101) and the positioning holes of the housing (1). The bolt and nut assemblies (102) and the gaskets (101) correspond one to one. The bolt and nut assemblies (102) on the rear side pass through and contact the first annular terminal (2).

10. A three-phase bridge rectifier according to claim 1, characterized in that, It also includes a heat sink (22), which is bolted to the bottom of the housing (1), and there is a certain gap between the heat sink (22) and the housing (1).

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