CN217010638U

CN217010638U - Silicon carbide high-voltage electric drive control device

Info

Publication number: CN217010638U
Application number: CN202122816862.XU
Authority: CN
Inventors: 陈登峰; 位超群; 宋君峰; 董大伟; 张允飞; 丁永根
Original assignee: Shanghai Auto Edrive Co Ltd; Shanghai Auto Edrive Engineering Technology Research Center; Shanghai Edrive Co Ltd
Current assignee: Shanghai Auto Edrive Co Ltd; Shanghai Auto Edrive Engineering Technology Research Center; Shanghai Edrive Co Ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-07-19
Anticipated expiration: 2031-11-17

Abstract

The utility model relates to a silicon carbide high-voltage electric drive control device which comprises a controller and a motor which are connected with each other, and is characterized in that the controller comprises a box body, a front-end filtering component, a film capacitor, a middle-end filtering component, a silicon carbide module component and a three-phase filtering component, wherein the front-end filtering component, the film capacitor, the middle-end filtering component, the silicon carbide module component and the three-phase filtering component are electrically connected and fixed in the box body in sequence. Compared with the prior art, the utility model can effectively filter current harmonic waves at the battery end, absorb switching noise generated by the silicon carbide module under high-frequency switching, filter differential mode interference at the alternating current end and inhibit the generation of shaft current, improve the electromagnetic and container of the electric drive control device and meet the working requirement of a high-voltage silicon carbide platform.

Description

Silicon carbide high-voltage electric drive control device

Technical Field

The utility model relates to the technical field of motor controllers, in particular to a silicon carbide high-voltage electric drive control device.

Background

With the development of the technology, new energy vehicle types with the endurance mileage exceeding 1000KM have been on the bright phase, endurance anxiety is greatly relieved, but the charging is slow, the charging is difficult to still limit the development of electric vehicles, and the high-voltage platform technology and the matched super charging pile are one of the best solutions at present. The voltage-withstanding capacity of the silicon-based IGBT power component is limited, the voltage range of a battery of the current new energy automobile is usually 200-400V, the charging time of a charging pile based on the voltage platform is long, and the convenience is low. Therefore, the layout of the high-voltage platform of 800V silicon carbide is started in each large car and enterprise at present. However, when the motor driving system is raised to 800V high voltage through the silicon carbide platform, a lot of noise waves and electromagnetic interference are generated, and the existing electric driving control structure cannot meet the requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a silicon carbide high-voltage electric drive control device, and key technologies such as the integration level, the electromagnetic compatibility and the system efficiency improvement of an electric drive control structure under a silicon carbide high-voltage platform are emphasized and optimized.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a carborundum high-voltage electricity drives controlling means, includes interconnect's controller and motor, its characterized in that, the controller includes box, front end filter subassembly, film capacitor, middle-end filter subassembly, carborundum modular component and three-phase filter subassembly be electrical connection in proper order and fix in the box.

Further, the middle-end filtering assembly comprises a middle-end Y capacitor, a middle-end capacitor plate, a conductive elastic sheet and a middle-end absorption resistor, the middle-end Y capacitor is distributed on the upper surface of the middle-end capacitor plate, the conductive elastic sheet and the middle-end absorption resistor are distributed on the lower surface of the middle-end capacitor plate, the middle-end capacitor plate is connected with the silicon carbide module assembly, and one end of the conductive elastic sheet abuts against a terminal of the silicon carbide module assembly.

Furthermore, the three-phase filtering assembly comprises a mounting support, a three-phase magnetic ring, a U-phase copper bar, a V-phase copper bar and a W-phase copper bar, wherein a mounting annular groove is formed in the mounting support, the three-phase magnetic ring is fixed in the mounting annular groove, one end of each of the U-phase copper bar, the V-phase copper bar and the W-phase copper bar is connected with a terminal of the silicon carbide module assembly, and the other end of each of the U-phase copper bar, the V-phase copper bar and the W-phase copper bar penetrates through the three-phase magnetic ring and then is exposed out of one side of the box body to form a wiring end.

Further, the mounting bracket comprises an upper bracket and a lower bracket which are mutually connected in a clamping manner.

Furthermore, the front-end filtering component comprises a supporting base, a copper bar component, a first filtering unit, a first filtering magnetic ring, a second filtering unit and a second filtering magnetic ring, wherein the first filtering unit, the first filtering magnetic ring, the second filtering unit and the second filtering magnetic ring are sequentially arranged on the supporting base in a distributed mode, two ends of the copper bar component are connected with the supporting base, the middle section of the copper bar component penetrates through the first filtering magnetic ring and the second filtering magnetic ring, and the middle section of the copper bar component is electrically connected with the first filtering unit and the second filtering unit.

Furthermore, the front-end filtering assembly further comprises a grounding cover, a first grounding elastic sheet is arranged on the first filtering unit, a second grounding elastic sheet is arranged on the second filtering unit, the grounding cover covers the first filtering unit, the first filtering magnetic ring, the second filtering unit and the second filtering magnetic ring in a pressing mode, two sides of the grounding cover are connected with the supporting base through grounding bolts, and the first grounding elastic sheet and the second grounding elastic sheet are both in contact with the grounding cover.

Further, first filtering unit includes ann rule X electric capacity, first group ann rule Y electric capacity, first PCB board, first group absorption resistance and discharge resistance, ann rule X electric capacity and first group ann rule Y electric capacity are hugged closely first PCB board bottom, first group absorption resistance and discharge resistance install at first PCB board upper surface, be equipped with first via hole on the first PCB board and be used for connecting the copper bar subassembly.

Further, the second filtering unit comprises a second set of safety Y capacitors, a second PCB and a second set of absorption resistors, the second set of safety Y capacitors are tightly attached to the bottom of the second PCB, the second set of absorption resistors are installed on the upper surface of the second PCB, and second via holes are formed in the second PCB and used for being connected with the copper bar assembly.

Furthermore, the input end of the three-phase filtering component is provided with a current sensor.

Furthermore, a cooling water channel is arranged on the box body, and two ends of the cooling water channel are connected with a water inlet pipe and a water outlet pipe.

Compared with the prior art, the utility model has the following beneficial effects:

1. according to the utility model, through the arrangement of the front-end filtering component, the middle-end filtering component and the three-phase filtering component, current harmonic waves at a battery end can be effectively filtered, switching noise generated by a silicon carbide module under a high-frequency switch can be absorbed, differential mode interference at an alternating current end can be filtered, generation of shaft current can be inhibited, an electromagnetic compatibility container of an electric drive control device is improved, and the working requirement of an 800V high-voltage silicon carbide platform is met.

2. The front-end filtering component realizes the fixation and grounding of the whole structure through the grounding cover, so that the structure is more compact and stable, the grounding path is shortened, and the filtering effect is improved. Meanwhile, a filtering unit of the front-end filtering assembly integrates a safety Y capacitor, an X capacitor, an absorption capacitor and the like, and the integration level and flexible expansibility of structural arrangement are improved.

3. Simple structure, simple to operate, production efficiency is high.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the controller.

Fig. 3 is a schematic structural diagram of a front-end filter assembly.

Fig. 4 is a schematic structural diagram of the first filtering unit.

Fig. 5 is a schematic structural diagram of the second filtering unit.

Fig. 6 is a schematic structural diagram of a middle-end filter assembly.

Fig. 7 is a schematic structural diagram of a three-phase filter assembly.

Reference numerals: 1. a controller, 11, a box body, 12, a front end filter assembly, 121, a support base, 122, a copper bar assembly, 123, a first filter unit, 1231, a safety X capacitor, 1232, a first set of safety Y capacitors, 1233, a first PCB, 1234, a first grounding elastic sheet, 1235, a first set of absorption resistors, 1236, a discharge resistor, 1237, a first via hole, 124, a first filter magnetic ring, 125, a buffer pad, 126, a second filter unit, 1261, a second set of safety Y capacitors, 1262, a second PCB, 1263, a second grounding elastic sheet, 1264, a second set of absorption resistors, 1265, a second via hole, 127, a second filter magnetic ring, 128, a grounding cover, 13, a film capacitor, 14, a middle end filter assembly, 141, a middle end Y capacitor, 142, a middle end capacitor plate, 143, a conductive elastic sheet, 144, a middle end absorption resistor, 15, a silicon carbide module assembly, 16, a three-phase filter assembly, 161, and an installation support, 161a, an upper support, 161b, a lower support, 162, a three-phase magnetic ring, 163, a U-phase copper bar, 164, a V-phase copper bar, 165, a W-phase copper bar, 17, a box cover, 18, a current sensor, 2 and a motor.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments. The present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.

As shown in fig. 1, the present embodiment provides a control device for high-voltage electric driving of silicon carbide, which includes a controller 1 and a motor 2 connected to each other, the motor 2 is a conventional flat-wire oil-cooled motor 2, and the controller 1 is fixed above the flat-wire oil-cooled motor 2. The controller 1 and the motor 2 have independent heat dissipation systems respectively, and the controller 1 dissipates heat of the silicon carbide module assembly and the like inside through a cooling water channel.

As shown in fig. 2, the controller 1 includes a case 11, a front end filter assembly 12, a thin film capacitor 13, a middle end filter assembly 14, a silicon carbide module assembly 15, and a three-phase filter assembly 16. The upper part of the box body 11 is provided with an opening, and a box cover 17 is arranged at the opening; a water inlet pipe and a water outlet pipe which are connected with a cooling water channel are arranged on one side of the box body 11; the box body 11 is also provided with interfaces such as a two-phase plug-in unit, a low-voltage plug-in unit and the like. The silicon carbide module assembly 15 is a main power module and is fixed at the bottom of the box body 11, the front-end filtering assembly 12, the film capacitor 13 and the middle-end filtering assembly 14 are all installed on one side of the silicon carbide module assembly 15, and the three-phase filtering assembly 16 is installed on the other side of the silicon carbide module assembly 15.

As shown in fig. 3, the front filter assembly 12 includes a supporting base 121, a copper bar assembly 122 (including a positive copper bar and a negative copper bar), a first filter unit 123, a first filter magnetic ring 124, a buffer pad 125, a second filter unit 126, a second filter magnetic ring 127, and a ground cover 128. The first filtering unit 123, the first filtering magnetic ring 124, the second filtering unit 126 and the second filtering magnetic ring 127 are sequentially distributed and mounted on the supporting base 121; the two ends of the copper bar assembly 122 are connected with the supporting base 121 through bolts to form a wiring terminal, the middle section of the copper bar assembly 122 penetrates through the first filtering magnetic ring 124 and the second filtering magnetic ring 127, and the middle section is further electrically connected with the first filtering unit 123 and the second filtering unit 126. The first filtering unit 123 is provided with a first grounding elastic sheet 1234, the second filtering unit 126 is provided with a second grounding elastic sheet 1263, the grounding cover 128 covers the first filtering unit 123, the first filtering magnetic ring 124, the second filtering unit 126 and the second filtering magnetic ring 127, two sides of the grounding cover 128 are connected with the supporting base 121 through grounding bolts, meanwhile, the body of the grounding cover 128 is made of conductive metal materials or lined with metal materials, the first grounding elastic sheet 1234 and the second grounding elastic sheet 1263 are both in contact with the grounding cover 128, and then grounding is achieved through the grounding bolts. By the scheme, the front-end filtering component 12 is more compact and stable in structure, a grounding path is shortened, and a filtering effect is improved. The buffer pad 125 is disposed between the first filtering magnetic ring 124 and the ground cover 128, and also disposed between the second filtering magnetic ring 127 and the ground cover 128, so as to reinforce the installation. The front-end filter assembly 12 has a 4-order filter structure, and can effectively filter current harmonics at the battery end.

As shown in fig. 4, the first filtering unit 123 is composed of a safety X capacitor 1231, a first safety Y capacitor 1232, a first PCB 1233, 4 first grounding

elastic pieces

1234, 12 first absorbing resistors 1235, 4 discharging resistors 1236, and a first via 1237. The bottom of the first PCB 1233 is tightly attached to the safety X capacitor 1231 and the first group of safety Y capacitors 1232, the safety X capacitors and the first group of safety Y capacitors are electrically connected with the first PCB 1233 through pins in wave soldering, and positive and negative paths are arranged inside the first PCB 1233 and are electrically connected into a system circuit through positive and negative copper bars. The first grounding elastic piece 1234 is electrically connected to the first PCB 1233 by wave soldering, and contacts with the grounding cover 128 to effectively ground the Y capacitor. The first group of absorbing resistors 1235 and the discharging resistor 1236 are arranged on the upper surface of the first PCB 1233 and are electrically connected with the first PCB 1233 through reflow soldering, wherein the absorbing resistors, the safety X capacitor 1231 and the first group of safety Y capacitor 1232 form an RC absorbing circuit, and electromagnetic noise and capacitance interference on the input side are effectively filtered.

As shown in fig. 5, the second filtering unit 126 is composed of a second set of safety Y capacitors 1261, a second PCB 1262, a second grounding spring 1263, a second set of absorption resistors 1264, and a second via 1265. Second set of safety Y capacitors 1261 are attached to the bottom of second PCB 1262, and second set of absorption resistors 1264 are mounted on the top surface of second PCB 1262. The second set of safety Y capacitors 1261 have a capacitance value that is an order of magnitude less than the first set of safety Y capacitors 1232 described above for filtering electromagnetic interference of different orders. Meanwhile, the second group of absorption resistors 1264 and the second group of safety Y capacitors 1261 form a second RC absorption circuit to further filter electromagnetic noise and capacitance interference on the input side.

As shown in fig. 6, the middle filter assembly 14 includes 6 middle Y capacitors 141 of 10nf, a middle capacitor plate 142, a conductive spring 143, and a middle absorbing resistor 144. The middle Y capacitor 141 is disposed on the upper surface of the middle capacitor plate 142, and the conductive spring 143 and the middle absorbing resistor 144 are disposed on the lower surface of the middle capacitor plate 142. The middle capacitor plate 142 is connected to the silicon carbide module assembly 15 such that one end of the conductive spring 143 abuts against a terminal of the silicon carbide module assembly 15. The method specifically comprises the following steps: three bolt holes are distributed on the middle-end capacitor plate 142, a convex column corresponding to the bolt holes is arranged on the silicon carbide module assembly 15, the middle-end capacitor plate 142 is fixed on the convex column through bolts, and the conductive elastic sheet 143 on the lower surface of the middle-end capacitor plate can be fixedly abutted against the conductive terminals on the surface of the silicon carbide module assembly 15.

As shown in fig. 7, the three-phase filter assembly 16 includes a mounting bracket 161, a three-phase magnetic ring 162, a U-phase copper bar 163, a V-phase copper bar 164, and a W-phase copper bar 165. The mounting bracket 161 includes an upper bracket 161a and a lower bracket 161b which are engaged with each other, the upper bracket 161a and the lower bracket 161b are connected with each other to form a mounting annular groove having a hollow interior, and the three-phase magnetic ring 162 is fixed in the mounting annular groove. One end of the U-phase copper bar 163, one end of the V-phase copper bar 164 and one end of the W-phase copper bar 165 are connected with the terminals of the silicon carbide module assembly 15, and the other ends of the U-phase copper bar, the V-phase copper bar 164 and the W-phase copper bar 165 penetrate through the three-phase magnetic ring 162 and then are exposed out of one side of the box body 11 to form wiring ends. As shown in fig. 2, a current sensor 18 is further provided at the input of the three-phase filter module 16 for detecting the current. In this embodiment, the three-phase magnetic ring 162 is made of ferrite, and is encapsulated in the lower bracket 161b for filtering the differential mode interference at the ac end and suppressing the generation of the shaft current by the controller 1.

In summary, in the embodiment, by the arrangement of the front-end filtering component 12, the middle-end filtering component 14 and the three-phase filtering component 16, the harmonic of the current at the battery end can be effectively filtered, the switching noise generated by the silicon carbide module under the high-frequency switch can be absorbed, the differential mode interference at the alternating current end can be filtered, the generation of the shaft current can be suppressed, the electromagnetic compatibility of the electric drive control device can be improved, and the working requirement of the 800V high-voltage silicon carbide platform can be met.

The foregoing detailed description of the preferred embodiments of the utility model has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection determined by the claims.

Claims

1. The utility model provides a carborundum high-voltage electricity drives controlling means, includes interconnect's controller (1) and motor (2), its characterized in that, controller (1) includes box (11), front end filter assembly (12), film capacitor (13), middle-end filter assembly (14), carborundum module component (15) and three-phase filter assembly (16) are electrical connection in proper order and fix in box (11).

2. The silicon carbide high voltage electric drive control device according to claim 1, wherein the middle filter assembly (14) comprises a middle Y capacitor (141), a middle capacitor plate (142), a conductive spring (143) and a middle absorbing resistor (144), the middle Y capacitor (141) is distributed on the upper surface of the middle capacitor plate (142), the conductive spring (143) and the middle absorbing resistor (144) are distributed on the lower surface of the middle capacitor plate (142), and the middle capacitor plate (142) is connected to the silicon carbide module assembly (15) to enable one end of the conductive spring (143) to abut against the terminal of the silicon carbide module assembly (15).

3. The high-voltage electric drive control device for silicon carbide as claimed in claim 1, wherein the three-phase filter assembly (16) comprises a mounting bracket (161), a three-phase magnetic ring (162), a U-phase copper bar (163), a V-phase copper bar (164) and a W-phase copper bar (165), a mounting annular groove is formed in the mounting bracket (161), the three-phase magnetic ring (162) is fixed in the mounting annular groove, one end of each of the U-phase copper bar (163), the V-phase copper bar (164) and the W-phase copper bar (165) is connected with a terminal of the silicon carbide module assembly (15), and the other end of each of the U-phase copper bar, the V-phase copper bar (164) and the W-phase copper bar (165) passes through the three-phase magnetic ring (162) and then is exposed out of one side of the box body (11) to form a terminal.

4. The silicon carbide high voltage drive control device as claimed in claim 3, wherein the mounting bracket (161) comprises an upper bracket (161a) and a lower bracket (161b) that are snap-fit to each other.

5. The silicon carbide high-voltage electric drive control device as claimed in claim 1, wherein the front end filter assembly (12) comprises a support base (121), a copper bar assembly (122), a first filter unit (123), a first filter magnetic ring (124), a second filter unit (126) and a second filter magnetic ring (127), the first filter unit (123), the first filter magnetic ring (124), the second filter unit (126) and the second filter magnetic ring (127) are sequentially distributed and mounted on the support base (121), two ends of the copper bar assembly (122) are connected with the support base (121), an intermediate section of the copper bar assembly (122) penetrates through the first filter magnetic ring (124) and the second filter magnetic ring (127), and the intermediate section of the copper bar assembly (122) is electrically connected with the first filter unit (123) and the second filter unit (126).

6. The silicon carbide high-voltage electric drive control device as claimed in claim 5, wherein the front end filter assembly (12) further comprises a ground cover (128), the first filter unit (123) is provided with a first ground spring (1234), the second filter unit (126) is provided with a second ground spring (1263), the ground cover (128) covers the first filter unit (123), the first filter magnetic ring (124), the second filter unit (126) and the second filter magnetic ring (127), two sides of the ground cover (128) are connected with a support base (121) through ground bolts, and the first ground spring (1234) and the second ground spring (1263) both contact the ground cover (128).

7. The silicon carbide high-voltage electric drive control device according to claim 5, wherein the first filter unit (123) comprises a safety X capacitor (1231), a first safety Y capacitor (1232), a first PCB (1233), a first absorbing resistor (1235) and a discharging resistor (1236), the safety X capacitor (1231) and the first safety Y capacitor (1232) are tightly attached to the bottom of the first PCB (1233), the first absorbing resistor (1235) and the discharging resistor (1236) are installed on the upper surface of the first PCB (1233), and a first via hole (1237) is formed in the first PCB (1233) and used for connecting the copper bar assembly (122).

8. The SiC high voltage drive control device according to claim 5, wherein the second filter unit (126) comprises a second set of safety Y capacitors (1261), a second PCB (1262) and a second set of absorption resistors (1264), the second set of safety Y capacitors (1261) is closely attached to the bottom of the second PCB (1262), the second set of absorption resistors (1264) is mounted on the upper surface of the second PCB (1262), and second through holes (1265) are formed in the second PCB (1262) for connecting the copper bar assembly (122).

9. Silicon carbide high voltage electric drive control device according to claim 1, characterized in that the input of the three-phase filter assembly (16) is provided with a current sensor (18).

10. The silicon carbide high-voltage electric driving control device according to claim 1, wherein a cooling water channel is arranged on the box body (11), and a water inlet pipe and a water outlet pipe are connected to two ends of the cooling water channel.