Staggered PFC circuit board layout structure of 60KW charging module

Abstract

The utility model provides a 60KW charging module staggered PFC circuit board layout structure which can avoid signal attenuation and loss and can realize miniaturization and integration. Comprising a printed circuit board, and the printed circuit board is provided with a first printing area used for filtering and preventing over-current and over-voltage, a second printing area used for realizing AC-DC rectification conversion output, and a third printing area used for assisting the second printing area to realize output control, which are connected in sequence. The first printing area and the third printing area are arranged on one side of the printed circuit board in parallel up and down, and the second printing area is arranged on the other side of the printed circuit board; the length of the printed circuit board is not larger than 550 mm, and the width of the printed circuit board is not larger than 390 mm.

Description

TECHNICAL FIELD

[0001] The utility model relates to 60KW high -power charging technical field, concretely is a 60KW charging module staggered PFC circuit board layout structure. BACKGROUND

[0002] With the development of new energy automobile technology, the requirement of charging power and efficiency is continuously improved. 60KW charging module becomes the common selection of many charging facilities because it can provide more electric energy for electric vehicles in relatively short time, and the staggered PFC technology can further improve the charging efficiency and power factor, and the layout design is particularly important to solve the problems of heat dissipation demand and electromagnetic compatibility.

[0003] The existing design of 60KW charging module mostly uses the mode of multiple PCB cross-plate to realize AC-DC conversion or control signal transmission, but this mode will cause signal attenuation and loss, and is not convenient for miniaturization and integration. UTILITY MODEL CONTENTS

[0004] In view of the above problems, the utility model provides a 60KW charging module staggered PFC circuit board layout structure, which can avoid signal attenuation and loss, and can realize miniaturization and integration.

[0005] The utility model adopts the following technical scheme, a 60KW charging module staggered PFC circuit board layout structure, including printed circuit board, the printed circuit board has the first printed area for filtering and preventing overcurrent and overvoltage, the second printed area for realizing AC-DC rectification conversion output is connected in sequence, the third printed area for assisting the second printed area to realize output control, the first printed area, third printed area upper and lower parallel arrangement in one side of the printed circuit board, the second printed area is arranged in the other side of the printed circuit board, the length of the printed circuit board is not more than 550mm, and the width of the printed circuit board is not more than 390mm.

[0006] Further, the first printed area includes an input port, a discharge tube, a first varistor unit, a first ceramic capacitor unit, a second varistor unit, a fuse unit, a first filter capacitor, a second filter capacitor, a third filter capacitor, a fourth filter capacitor, a first-stage PFC input filter, a second-stage PFC input filter, a first relay, a second relay, a first Y capacitor, and a fifth filter capacitor. The input port, the third filter capacitor, the fourth filter capacitor, and the first Y capacitor are arranged from top to bottom on the edge side of the first printed area. The second filter capacitor, the first relay, and the second relay are arranged from top to bottom on the inner side of the first printed area. The second varistor unit, the first filter capacitor, the first-stage PFC input filter, and the second-stage PFC input filter are arranged from top to bottom in the central region of the first printed area. The first varistor unit, the first ceramic capacitor unit, and the fuse unit are arranged from top to bottom on the inner side of the input port. The discharge tube is arranged above the input port.

[0007] Further, the first varistor unit and the second varistor unit each include three varistors. The first ceramic capacitor unit includes three ceramic capacitors. The fuse unit includes three fuses. The input port is used to connect the A phase, the B phase, and the C phase of a bus. The three ceramic capacitors in the first ceramic capacitor unit are connected in a star shape to the bus. The three fuses in the fuse unit are respectively connected in series to the A phase, the B phase, and the C phase of the bus. The three varistors in the first varistor unit are connected in a star shape to the bus and are connected in series to the discharge tube. The three varistors in the second varistor unit are connected in a triangle shape to the bus. The first filter capacitor, the second filter capacitor, and the fifth filter capacitor are connected in a star shape to the bus after the second varistor unit. The first-stage PFC input filter and the second-stage PFC input filter are respectively connected to the bus. The third filter capacitor and the fourth filter capacitor are connected to the bus between the first-stage PFC input filter and the second-stage PFC input filter. The third filter capacitor and the fourth filter capacitor are connected in series.

[0008] Further, the second printed area includes first to sixth PFC inductors, a first cement resistor, a second cement resistor, first to ninth electrolytic capacitors, first to sixth heat sinks, a sixth filter capacitor, a seventh filter capacitor, an eighth filter capacitor, a first drive controller, a second drive controller, a third drive controller, tenth to eighteenth electrolytic capacitors, a first fan controller, a first PFC drive transformer, a second fan controller, a second PFC drive transformer, a third fan controller, a third PFC drive transformer, the first to sixth PFC inductors are arranged in pairs from top to bottom on the inner side of the second printed area, the first to sixth heat sinks are arranged in order from top to bottom in the central area of the second printed area, the first fan controller, the first PFC drive transformer, the second fan controller, the second PFC drive transformer, the third fan controller, and the third PFC drive transformer are arranged in order from top to bottom on the edge side of the second printed area, the first to ninth electrolytic capacitors are arranged in order from left to right above the second printed area, the tenth to eighteenth electrolytic capacitors are arranged in order from left to right below the second printed area, the first cement resistor is arranged below the first PFC inductor, the second cement resistor is arranged below the third PFC inductor, the sixth filter capacitor and the first drive controller are arranged from left to right below the first heat sink, the seventh filter capacitor and the second drive controller are arranged from left to right below the third heat sink, and the eighth filter capacitor and the third drive controller are arranged from left to right below the fifth heat sink.

[0009] Further, the first cement resistor and the second cement resistor are respectively connected to the C-phase and B-phase busbars outputted from the second-stage PFC input filter, the first PFC inductor and the second PFC inductor are connected in parallel to the C-phase busbar after the first cement resistor, the third PFC inductor and the fourth PFC inductor are connected in parallel to the A-phase busbar outputted from the second-stage PFC input filter, the fifth PFC inductor and the sixth PFC inductor are connected in parallel to the B-phase busbar after the second cement resistor, the first to sixth heat sinks are respectively provided with rectifier diodes and switch tubes connected in series, the rectifier diodes and switch tubes connected in series on the first and second heat sinks are connected in parallel to the C-phase busbar after the first PFC inductor, the rectifier diodes and switch tubes connected in series on the third and fourth heat sinks are connected in parallel to the A-phase busbar after the third PFC inductor, the rectifier diodes and switch tubes connected in series on the third and fourth heat sinks are connected in parallel to the B-phase busbar after the fifth PFC inductor, the first to ninth electrolytic capacitors are connected in parallel to the busbar between the C-phase and A-phase busbars after the first heat sink, the tenth to eighteenth electrolytic capacitors are connected in parallel to the busbar between the A-phase and B-phase busbars after the fifth heat sink, and the sixth to eighth filter capacitors are connected in star to the busbar after the first electrolytic capacitor.

[0010] Further, the third printed area includes an auxiliary source switch tube, a DSP controller, a nineteenth electrolytic capacitor, a communication module, a temperature sampling module, an auxiliary power transformer, a voltage / current sampling module, the auxiliary power transformer is arranged at the edge side of the third printed area, the voltage / current sampling module is arranged at the inner side of the third printed area, the temperature sampling module, the DSP controller and the communication module are arranged in sequence from top to bottom at the central area of the third printed area, and the auxiliary source switch tube and the nineteenth electrolytic capacitor are arranged in sequence from top to bottom at the inner side of the auxiliary power transformer.

[0011] Further, the auxiliary power transformer primary end is connected to the bus located at the back stage of the sixth filter capacitor, the auxiliary power transformer secondary end is connected with the auxiliary source switch tube and the nineteenth electrolytic capacitor, the output end of the auxiliary source switch tube is connected to the power supply end of the DSP controller, the communication module, the temperature sampling module and the voltage / current sampling module are respectively connected to the signal output end of the DSP controller, the first drive controller, the second drive controller and the third drive controller are connected in parallel with each other, the first PFC drive transformer, the second PFC drive transformer and the third PFC drive transformer are connected in parallel with each other, the first drive controller, the second drive controller and the third drive controller and the first PFC drive transformer, the second PFC drive transformer and the third PFC drive transformer jointly constitute a drive module, the first heat sink to the sixth heat sink are all locked with rectifier diodes and switch tubes, the output end of the drive module is connected with the switch tubes on the first heat sink to the sixth heat sink, so as to control the on-off of the switch tubes on the first heat sink to the sixth heat sink, the input end of the drive module is connected with the signal control output end of the DSP controller, the first fan controller, the second fan controller and the third fan controller are connected in parallel with each other to constitute a fan control module, the output end of the fan control module is connected with a fan, the input end of the fan control module is connected with the signal control output end of the DSP controller, and the parallel joint between the first relay, the second relay and the first Y capacitor is connected with the signal control output end of the DSP controller.

[0012] The first printed area for filtering and preventing overcurrent and overvoltage, the second printed area for realizing AC-DC rectification conversion output, and the third printed area for assisting the second printed area to realize output control are arranged on the same printed circuit board, the layout mode can make the signal more complete, signal attenuation and loss can be avoided, the length of the printed circuit board is not greater than 550 mm, the width of the printed circuit board is not greater than 390 mm, miniaturization and integration are effectively realized, and the printed circuit board has good use value. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the circuit layout diagram of the utility model;

[0014] Figure 2 is the circuit connection block diagram of the utility model. DETAILED DESCRIPTION

[0015] As Figure 1 , Figure 2As shown, the utility model discloses a 60KW charging module staggered PFC circuit board layout structure, including printed circuit board S1, printed circuit board S1 has the first printing area S2 for filtering and preventing overcurrent and overvoltage, the second printing area S3 for realizing AC-DC rectification conversion output, the third printing area S4 for the auxiliary second printing area S3 realizes the output control of connection in proper order on the side, and the first printing area S2, the third printing area S4 are arranged on the other side of printed circuit board S1, and the second printing area S3 is arranged on the other side of printed circuit board S1, the length of printed circuit board S1 is not more than 550mm, and the width of printed circuit board S1 is not more than 390mm.

[0016] The first printing area S2 includes an input port (1), a discharge tube (2), a first pressure-sensitive resistor unit (3), a first ceramic capacitor unit (4), a second pressure-sensitive resistor unit (5), a safety tube unit (6), a first filter capacitor (7), a second filter capacitor (8), a third filter capacitor (9), a fourth filter capacitor (10), a first-stage PFC input filter (11), a second-stage PFC input filter (12), a first relay (13), a second relay (14), a first Y capacitor (15), and a fifth filter capacitor (67). The input port (1), the third filter capacitor (9), the fourth filter capacitor (10), and the first Y capacitor (15) are arranged from top to bottom in the edge side of the first printing area S2. The second filter capacitor (8), the first relay (13), and the second relay (14) are arranged from top to bottom in the inner side of the first printing area S2. The second pressure-sensitive resistor unit (5), the first filter capacitor (7), the first-stage PFC input filter (11), and the second-stage PFC input filter (12) are arranged from top to bottom in the central region of the first printing area S2. The first pressure-sensitive resistor unit (3), the first ceramic capacitor unit (4), and the safety tube unit (6) are arranged from top to bottom in the inner side of the input port (1). The discharge tube (2) is arranged above the input port (1).

[0017] The first voltage-dependent resistor unit (3) and the second voltage-dependent resistor unit (5) each comprise three voltage-dependent resistors, the first ceramic capacitor unit (4) comprises three ceramic capacitors, the safety tube unit (6) comprises three safety tubes, the A phase, the B phase and the C phase corresponding to the bus are connected with the safety tubes, and the safety tubes play the role of safety fusing when the current is too large; the input port (1) is used for connecting the A phase, the B phase and the C phase of the bus, the three ceramic capacitors in the first ceramic capacitor unit (4) are connected in star on the bus, the three safety tubes in the safety tube unit (6) are respectively connected in series on the A phase, the B phase and the C phase of the bus, the three voltage-dependent resistors in the first voltage-dependent resistor unit (3) are connected in star on the bus and then connected in series with the discharge tube (2), playing the role of lightning protection; the three voltage-dependent resistors in the second voltage-dependent resistor unit (5) are connected in triangle on the bus, that is, the three voltage-dependent resistors in the second voltage-dependent resistor unit (5) are marked as voltage-dependent resistor (5-1), voltage-dependent resistor (5-2) and voltage-dependent resistor (5-3), and the voltage-dependent resistor (5-1), the voltage-dependent resistor (5-2) and the voltage-dependent resistor (5-3) are connected in triangle on the bus; the first filter capacitor (7), the second filter capacitor (8) and the fifth filter capacitor (67) are connected in star on the bus located at the rear stage of the second voltage-dependent resistor unit (5), the safety tube unit (6) is connected with the first voltage-dependent resistor unit (3), the second voltage-dependent resistor unit (5), the first filter capacitor (7), the second filter capacitor (8) and the fifth filter capacitor (67) at the rear stage, playing the roles of filtering and preventing overcurrent and overvoltage; the first-stage PFC input filter (11) and the second-stage PFC input filter (12) are respectively connected to the bus, the third filter capacitor (9) and the fourth filter capacitor (10) are connected to the bus located between the first-stage PFC input filter (11) and the second-stage PFC input filter (12), and the third filter capacitor (9) and the fourth filter capacitor (10) are connected in series.

[0018] The second printing area S3 includes the first PFC inductor (16) to the sixth PFC inductor (21), the first cement resistor (22), the second cement resistor (23), the first electrolytic capacitor (24) to the ninth electrolytic capacitor (32), the first heat sink (33) to the sixth heat sink (38), the sixth filter capacitor (39), the seventh filter capacitor (40), the eighth filter capacitor (41), the first drive controller (42), the second drive controller (43), the third drive controller (44), the tenth electrolytic capacitor (45) to the eighteenth electrolytic capacitor (53), the first fan controller (54), the first PFC drive transformer (55), the second fan controller (56), the second PFC drive transformer (57), the third fan controller (58), the third PFC drive transformer (59), the first PFC inductor (16) to the sixth PFC inductor (21) are arranged in pairs from top to bottom on the inner side of the second printing area S3, the first heat sink (33) to the sixth heat sink (38) are arranged in sequence from top to bottom in the central area of the second printing area S3, the first fan controller (54), the first PFC drive transformer (55), the second fan controller (56), the second PFC drive transformer (57), the third fan controller (58), the third PFC drive transformer (59) are arranged in sequence from top to bottom on the edge side of the second printing area S3, the first electrolytic capacitor (24) to the ninth electrolytic capacitor (32) are arranged in sequence from left to right above the second printing area S3, the tenth electrolytic capacitor (45) to the eighteenth electrolytic capacitor (53) are arranged in sequence from left to right below the second printing area S3, the first cement resistor (22) is arranged below the first PFC inductor (16), the second cement resistor (23) is arranged below the third PFC inductor (18), the sixth filter capacitor (39), the first drive controller (42) are arranged from left to right below the first heat sink (33), the seventh filter capacitor (40), the second drive controller (43) are arranged from left to right below the third heat sink (35), the eighth filter capacitor (41), the third drive controller (44) are arranged from left to right below the fifth heat sink (37); the sixth filter capacitor (39), the seventh filter capacitor (40), the eighth filter capacitor (41) and the first electrolytic capacitor (24) to the ninth electrolytic capacitor (32), the tenth electrolytic capacitor (45) to the eighteenth electrolytic capacitor (53) have the functions of filtering and energy storage.

[0019] The first cement resistor (22) and the second cement resistor (23) are connected to the C-phase and B-phase busbars after the second-stage PFC input filter (12), respectively; the first PFC inductor (16) and the second PFC inductor (17) are connected in parallel to the C-phase busbar after the first cement resistor (22); the third PFC inductor (18) and the fourth PFC inductor (19) are connected in parallel to the A-phase busbar after the second-stage PFC input filter (12); the fifth PFC inductor (20) and the sixth PFC inductor (21) are connected in parallel to the B-phase busbar after the second cement resistor (23); the first heat sink (33) to the sixth heat sink (38) are all locked with the series-connected rectifier diodes and switch tubes; the rectifier diodes and switch tubes connected in series on the first heat sink (33) and the second heat sink (34) are connected in parallel to the C-phase busbar after the first PFC inductor (16); the rectifier diodes and switch tubes connected in series on the third heat sink (35) and the fourth heat sink (36) are connected in parallel to the A-phase busbar after the third PFC inductor (18); the rectifier diodes and switch tubes connected in series on the third heat sink (35) and the fourth heat sink (36) are connected in parallel to the B-phase busbar after the fifth PFC inductor (20); the first electrolytic capacitor (24) to the ninth electrolytic capacitor (32) are connected in parallel to the busbar between the C-phase and the A-phase after the first heat sink (33); the tenth electrolytic capacitor (45) to the eighteenth electrolytic capacitor (53) are connected in parallel to the busbar between the A-phase and the B-phase after the fifth heat sink (37); the sixth filter capacitor (39), the seventh filter capacitor (40) and the eighth filter capacitor (41) are connected in star to the busbar after the first electrolytic capacitor (24).

[0020] The third printed area S4 includes an auxiliary source switch tube (60), a DSP controller (61), a nineteenth electrolytic capacitor (62), a communication module (63), a temperature sampling module (64), an auxiliary power transformer (65), a voltage / current sampling module (66), the auxiliary power transformer (65) is arranged at the edge side of the third printed area S4, the voltage / current sampling module (66) is arranged at the inner side of the third printed area S4, the temperature sampling module (64), the DSP controller (61), and the communication module (63) are arranged in the center area of the third printed area S4 from top to bottom, and the auxiliary source switch tube (60) and the nineteenth electrolytic capacitor (62) are arranged in the inner side of the auxiliary power transformer (65) from top to bottom; wherein the DSP controller (61), the communication module (63), the temperature sampling module (64), the voltage / current sampling module (66), the first drive controller (42), the second drive controller (43), and the third drive controller (44) all adopt existing control devices or modules.

[0021] The auxiliary power transformer (65) is connected to the bus after the sixth filter capacitor (39) in the primary end, and the secondary end of the auxiliary power transformer (65) is connected to the auxiliary switch tube (60) and the nineteenth electrolytic capacitor (62). The output end of the auxiliary switch tube (60) is connected to the power supply end of the DSP controller (61). The communication module (63), the temperature sampling module (64), and the voltage / current sampling module (66) are respectively connected to the signal output end of the DSP controller (61). The first drive controller (42), the second drive controller (43), and the third drive controller (44) are connected in parallel. The first PFC drive transformer (55), the second PFC drive transformer (57), and the third PFC drive transformer (59) are connected in parallel. The first drive controller (42), the second drive controller (43), and the third drive controller (44) and the first PFC drive transformer (55), the second PFC drive transformer (57), and the third PFC drive transformer (59) constitute a drive module. The output end of the drive module is connected to the switch tube attached to the first heat sink (33) to the sixth heat sink (38) to control the on-off of the attached switch tube. The input end of the drive module is connected to the signal control output end of the DSP controller (61). The first fan controller (54), the second fan controller (56), and the third fan controller (58) are connected in parallel to constitute a fan control module. The output end of the fan control module is connected to the fan (not shown in the figure). The input end of the fan control module is connected to the signal control output end of the DSP controller (61). The parallel connection point between the first relay (13), the second relay (14), and the first Y capacitor (15) is connected to the signal control output end of the DSP controller (61). The DSP controller (61) is connected to the first relay (13) and the second relay (14) to control the on-off and input. The first Y capacitor (15) can reduce signal electromagnetic interference.

[0022] The utility model discloses a three-phase voltage / current is entered from the input port (1) after A phase, B phase, C phase three -phase voltage / current, and sequentially passes through first ceramic capacitor unit (4), safety tube unit (6), first piezoresistance unit (3), second piezoresistance unit (5), first filter capacitor (7), second filter capacitor (8), fifth filter capacitor (67) after first -level PFC input filter (11), second -level PFC input filter (12), and be equipped with third filter capacitor (9), fourth filter capacitor (10) between first -level PFC input filter (11), second -level PFC input filter (12), thereby realize the harmonic and noise interference of reducing power input end, and filter capacitor plays the role of secondary filtering, in general, first printing area is mainly after bus voltage enters, carries out the role of filtering and protection, then three -phase current enters second printing area, passes through first PFC inductance (16) ~ sixth PFC inductance (21), plays the role of improving power factor, reducing power grid pollution and energy storage boost, and then obtains relatively clean AC current, wherein, first fin (33) ~ sixth fin (38) all lock with rectifier diode and switch tube, then AC current is rectified by rectifier diode on fin and obtains DC current, first drive controller (42), second drive controller (43), third drive controller (44) and first PFC drive transformer (55), second PFC drive transformer (57), third PFC drive transformer (59) constitute drive module, after DSP controller (61) control drive module opens switch tube on fin, rectified DC current finally flows to output end (that is Figure 2 The rightmost arrow end in the middle), the second printing area is mainly used for three -phase current after first printing area output, through corresponding inductance boost, diode rectification, and finally through switch tube on-off flow to output end, thereby realizing AC-DC rectification conversion output, the output end of second printing area is connected with third printing area, and the output of second printing area is connected with auxiliary power supply transformer (65) after auxiliary power supply transformer (65) to realize power supply, and nineteenth electrolytic capacitor (62) is connected in parallel with auxiliary power supply transformer (65) secondary to play the role of voltage stabilizing, the third printing area is mainly used for various sampling data to reach DSP controller (61) after, through the corresponding signal of DSP controller (61) output makes the circuit steady operation.

[0023] In the utility model, all components height is not more than 40mm.

[0024] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0025] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that a person skilled in the art can understand.

Claims

1. A staggered PFC circuit board layout structure for a 60KW charging module, characterized in that: The application relates to a printed circuit board, which has a first printed area for filtering and preventing overcurrent and overvoltage, a second printed area for realizing AC-DC rectification and output conversion, and a third printed area for assisting the second printed area in realizing output control, the first printed area and the third printed area being arranged on one side of the printed circuit board, and the second printed area being arranged on the other side of the printed circuit board; the length of the printed circuit board is not greater than 550 mm, and the width of the printed circuit board is not greater than 390 mm. The first printed area comprises an input port (1), a discharge tube (2), a first pressure-sensitive resistor unit (3), a first ceramic capacitor unit (4), a second pressure-sensitive resistor unit (5), a safety tube unit (6), a first filter capacitor (7), a second filter capacitor (8), a third filter capacitor (9), a fourth filter capacitor (10), a first-stage PFC input filter (11), a second-stage PFC input filter (12), a first relay (13), a second relay (14), a first Y capacitor (15), and a fifth filter capacitor (67), the input port (1), the third filter capacitor (9), the fourth filter capacitor (10), and the first Y capacitor (15) being arranged from top to bottom on the edge side of the first printed area, the second filter capacitor (8), the first relay (13), and the second relay (14) being arranged from top to bottom on the inner side of the first printed area, the second pressure-sensitive resistor unit (5), the first filter capacitor (7), the first-stage PFC input filter (11), and the second-stage PFC input filter (12) being arranged from top to bottom in the central region of the first printed area, the first pressure-sensitive resistor unit (3), the first ceramic capacitor unit (4), and the safety tube unit (6) being arranged from top to bottom on the inner side of the input port (1), and the discharge tube (2) being arranged above the input port (1). The first voltage-dependent resistor unit (3) and the second voltage-dependent resistor unit (5) each include three voltage-dependent resistors, the first ceramic capacitor unit (4) includes three ceramic capacitors, and the safety tube unit (6) includes three safety tubes; the input port (1) is used for connecting A phase, B phase and C phase of a bus, the three ceramic capacitors in the first ceramic capacitor unit (4) are connected in star on the bus, the three safety tubes in the safety tube unit (6) are respectively connected in series on A phase, B phase and C phase of the bus, the three voltage-dependent resistors in the first voltage-dependent resistor unit (3) are connected in star on the bus and then connected in series with the discharge tube (2), the three voltage-dependent resistors in the second voltage-dependent resistor unit (5) are connected in triangle on the bus, the first filter capacitor (7), the second filter capacitor (8) and the fifth filter capacitor (67) are connected in star on the bus at the back stage of the second voltage-dependent resistor unit (5), the first-stage PFC input filter (11) and the second-stage PFC input filter (12) are respectively connected to the bus, the third filter capacitor (9) and the fourth filter capacitor (10) are connected to the bus between the first-stage PFC input filter (11) and the second-stage PFC input filter (12), and the third filter capacitor (9) and the fourth filter capacitor (10) are connected in series between them. The second printed area includes first PFC inductor (16) sixth PFC inductor (21), first cement resistance (22), second cement resistance (23), first electrolytic capacitor (24) ninth electrolytic capacitor (32), first fin (33) sixth fin (38), sixth filter capacitor (39), seventh filter capacitor (40), eighth filter capacitor (41), first drive controller (42), second drive controller (43), third drive controller (44), tenth electrolytic capacitor (45) eighteenth electrolytic capacitor (53), first fan controller (54), first PFC drive transformer (55), second fan controller (56), second PFC drive transformer (57), third fan controller (58), third PFC drive transformer (59), the first PFC inductor (16) sixth PFC inductor (21) from top to bottom two two one row in turn arranged in the inner side of the second printed area, the first fin (33) sixth fin (38) from top to bottom in turn arranged in the central region of the second printed area, the first fan controller (54), first PFC drive transformer (55), second fan controller (56), second PFC drive transformer (57), third fan controller (58), third PFC drive transformer (59) from top to bottom in turn arranged in the edge side of the second printed area, the first electrolytic capacitor (24) ninth electrolytic capacitor (32) from left to right in turn arranged above the second printed area, the tenth electrolytic capacitor (45) eighteenth electrolytic capacitor (53) from left to right in turn arranged below the second printed area, the first cement resistance (22) is arranged below the first PFC inductor (16), the second cement resistance (23) is arranged below the third PFC inductor (18), the sixth filter capacitor (39), first drive controller (42) are arranged from left to right below the first fin (33), the seventh filter capacitor (40), second drive controller (43) are arranged from left to right below the third fin (35), the eighth filter capacitor (41), third drive controller (44) are arranged from left to right below the fifth fin (37); The first cement resistor (22) and the second cement resistor (23) are connected to the C-phase and B-phase busbars outputted from the second-stage PFC input filter (12) respectively, the first PFC inductor (16) and the second PFC inductor (17) are connected in parallel to the C-phase busbar after the first cement resistor (22), the third PFC inductor (18) and the fourth PFC inductor (19) are connected in parallel to the A-phase busbar outputted from the second-stage PFC input filter (12), the fifth PFC inductor (20) and the sixth PFC inductor (21) are connected in parallel to the B-phase busbar after the second cement resistor (23), the first fin (33) to the sixth fin (38) are all locked with the series-connected rectifier diode and switch tube, the rectifier diode and switch tube series-connected on the first fin (33) and the second fin (34) are connected in parallel to the C-phase busbar after the first PFC inductor (16), the rectifier diode and switch tube series-connected on the third fin (35) and the fourth fin (36) are connected in parallel to the A-phase busbar after the third PFC inductor (18), the rectifier diode and switch tube series-connected on the third fin (35) and the fourth fin (36) are connected in parallel to the B-phase busbar after the fifth PFC inductor (20), the first electrolytic capacitor (24) to the ninth electrolytic capacitor (32) are connected in parallel to the busbar between the C-phase and A-phase after the first fin (33), the tenth electrolytic capacitor (45) to the eighteenth electrolytic capacitor (53) are connected in parallel to the busbar between the A-phase and B-phase after the fifth fin (37), the sixth filter capacitor (39), the seventh filter capacitor (40) and the eighth filter capacitor (41) are connected in star to the busbar after the first electrolytic capacitor (24); The third printed area includes auxiliary source switch tube (60), DSP controller (61), nineteenth electrolytic capacitor (62), communication module (63), temperature sampling module (64), auxiliary power transformer (65), voltage / current sampling module (66), the auxiliary power transformer (65) is arranged at the edge side of the third printed area, the voltage / current sampling module (66) is arranged at the inner side of the third printed area, the temperature sampling module (64), the DSP controller (61), the communication module (63) are arranged in the center area of the third printed area from top to bottom, the auxiliary source switch tube (60) and the nineteenth electrolytic capacitor (62) are arranged in the inner side of the auxiliary power transformer (65) from top to bottom. The auxiliary power transformer (65) is connected to the bus after the sixth filter capacitor (39) in primary, the auxiliary power transformer (65) is connected with the auxiliary switch tube (60) and the nineteenth electrolytic capacitor (62) in secondary, the output of the auxiliary switch tube (60) is connected to the power supply end of the DSP controller (61), the communication module (63), the temperature sampling module (64) and the voltage / current sampling module (66) are connected to the signal output end of the DSP controller (61) respectively, the first drive controller (42), the second drive controller (43) and the third drive controller (44) are connected in parallel, the first PFC drive transformer (55), the second PFC drive transformer (57) and the third PFC drive transformer (59) are connected in parallel, the first drive controller (42), the second drive controller (43), the third drive controller (44), the first PFC drive transformer (55), the second PFC drive transformer (57) and the third PFC drive transformer (59) constitute the drive module, the first heat sink (33) to the sixth heat sink (38) are locked with rectifier diode and switch tube, the output of the drive module is connected with the switch tube on the first heat sink (33) to the sixth heat sink (38) to realize the control of the switch tube on the first heat sink (33) to the sixth heat sink (38), the input of the drive module is connected with the signal control output end of the DSP controller (61), the first fan controller (54), the second fan controller (56) and the third fan controller (58) are connected in parallel to constitute the fan control module, the output of the fan control module is connected with the fan, the input of the fan control module is connected with the signal control output end of the DSP controller (61), the parallel joint between the first relay (13), the second relay (14) and the first Y capacitor (15) is connected with the signal control output end of the DSP controller (61).

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