CN111245199A - Current transformer - Google Patents

Abstract

The invention provides a current transformer which comprises a box body and an electric element arranged in the box body. The capacitor comprises a capacitor main body, a capacitor input bus and a capacitor output bus, wherein the capacitor input bus and the capacitor output bus are respectively led out from different sides of the capacitor main body; a heat dissipation cavity and an element cavity which are separated by a heat dissipation partition plate are arranged in the box body, the capacitor is positioned in the element cavity, and the capacitor is integrally packaged on the heat dissipation partition plate through a first heat conduction insulating material; and an input power socket of the converter is arranged on the box wall of the box body, and the capacitor input busbar is directly connected with the input power socket. The capacitor which is not packaged is integrally packaged on the heat dissipation partition plate of the box body, so that the heat dissipation efficiency of the converter, particularly the capacitor, can be effectively improved. In addition, stray inductance can be effectively reduced by directly connecting the capacitor input busbar with the input power socket.

Description

Current transformer

Technical Field

The invention relates to the field of design of converters, in particular to a heat dissipation design of an electrical element in a converter.

Background

With the increasing concern of environmental protection problems, new energy industries are in the process of transportation. In the field of new energy vehicles, pure electric vehicles have attracted attention. The core component of the pure electric vehicle is a driving motor and a motor controller for controlling the driving motor. The motor controller is essentially an inverter, and the current or voltage output from the battery module is converted into a current or voltage for driving the motor through various transformations such as rectification, phase change and the like by a core component IGBT module of the inverter.

Motor controller wide application in new energy automobile field, its operation ambient temperature is high, and the inside part that generates heat is many simultaneously, can influence the reliability of inside components and parts, and then influences motor controller's whole life-span. Therefore, it is highly desirable to dissipate heat from the motor controller to ensure reliability of the motor controller.

Generally, a heat source causing internal environment temperature rise in a motor controller comprises multiple factors such as an IGBT module, a capacitor, a busbar, a control chip and the like. The existing motor controller does not consider the heat dissipation problem of internal components of the motor controller during design, or only considers the heat dissipation of an IGBT module as a core component, and neglects a capacitor and a busbar which are serious in heat dissipation, so that the existing motor controller does not have a heat dissipation effect, or is low in heat dissipation efficiency and not comprehensive and efficient enough.

Therefore, there is a need for a converter that can be used for controlling a motor and has good heat dissipation performance without making excessive structural changes to the existing converter.

Disclosure of Invention

The following presents a simplified summary of one or more aspects in order to provide a basic understanding of such aspects. This summary is not an extensive overview of all contemplated aspects, and is intended to neither identify key or critical elements of all aspects nor delineate the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form as a prelude to the more detailed description that is presented later.

In order to provide a converter for controlling a motor, which has the advantages of simple structure, good heat dissipation performance and low cost, the invention provides the converter, which comprises a box body and an electric element arranged in the box body, wherein the electric element at least comprises a capacitor, the capacitor comprises a capacitor main body, a capacitor input bus and a capacitor output bus, and the capacitor input bus and the capacitor output bus are respectively led out from different side edges of the capacitor main body;

a heat dissipation cavity and an element cavity which are separated by a heat dissipation partition plate are arranged in the box body, the capacitor is positioned in the element cavity, and the capacitor is integrally packaged on the heat dissipation partition plate through a first heat conduction insulating material; and

and an input power socket of the converter is arranged on the box wall of the box body, and the capacitor input busbar is directly connected with the input power socket.

In the embodiment, the converter provided by the invention adopts the capacitor which is not packaged, and the capacitor is integrally packaged on the heat dissipation partition plate of the box body through the heat conduction insulating material, so that heat caused by heating of the capacitor can be timely led out to the heat dissipation cavity, and the heat dissipation efficiency of the capacitor in the converter is effectively improved. And, through adopting the electric capacity that does not encapsulate, can change the female setting mode of arranging of input mother and output of electric capacity, through the female mode of drawing out of the both sides side of arranging electric capacity input mother and output mother for electric capacity input mother can directly link with input supply socket, thereby has reduced the noise interference route between electric capacity input mother and the input supply socket, and then can effectively reduce stray inductance.

Optionally, the first heat-conducting insulating material is potting adhesive, and the capacitor is integrally packaged in the heat-dissipating partition plate through the potting adhesive.

In the above embodiment, the capacitor that is not packaged is integrally packaged on the heat dissipation partition plate by using the packaging potting adhesive, so that the function of fixing the capacitor is achieved. Moreover, the packaging potting adhesive is a heat-conducting and insulating material and can have both heat-conducting property and insulating property.

Optionally, the capacitor input busbar and the capacitor output busbar are both low-inductance busbars.

In the above embodiments, in order to reduce the stray inductance of the converter, the capacitor input busbar and the capacitor output busbar are both low-inductance busbars.

Optionally, the electrical component further includes an IGBT module, the IGBT module is located in the component cavity and attached to the heat dissipation partition plate through a second heat conductive insulating material, and the first heat conductive insulating material is different from the second heat conductive insulating material; and

the capacitor output busbar is directly connected with the input end of the IGBT module.

In the above embodiment, the core component IGBT module of the current transformer can dissipate heat to the heat dissipation cavity in time through the heat conductive insulating material. Furthermore, as the capacitor input busbar and the capacitor output busbar are led out from different sides of the capacitor, the capacitor output busbar can be directly connected with the input end of the IGBT module, so that a noise interference path between the capacitor output busbar and the IGBT module can be effectively reduced, and stray inductance can be effectively reduced.

Optionally, an output three-phase socket of the converter is arranged on a box wall of the box body, and the IGBT module and the output three-phase socket are connected by an output busbar.

Optionally, the output busbar is a low-inductance busbar, and the output busbar is attached to the heat dissipation partition plate through the second heat-conducting insulating material.

In the above embodiment, the output bus bar is set to be the low-inductance bus bar, so that stray inductance possibly existing in the converter can be effectively reduced. And, through with above-mentioned female row of output pass through heat conduction insulating material laminating on heat dissipation baffle, can effectively be with because the female heat that arouses of arranging of output derives to the heat dissipation cavity to can improve the radiating efficiency of converter.

Optionally, the electrical component further includes a control module, the control module is located in the component cavity, and a chip region of the control module is attached to the heat dissipation partition plate through the second heat-conducting insulating material.

In the above embodiments, the chip area of the control module is the main heat source of the control module. Through with above-mentioned chip region through the laminating of heat conduction insulating material on heat dissipation baffle, can effectively derive the heat that arouses to the heat dissipation cavity because the chip region generates heat to can improve the radiating efficiency of converter.

Optionally, the IGBT module is disposed between the other region of the control module and the heat dissipation partition.

As mentioned above, the main heat source of the control module is the chip area of the control module, and other areas of the control module generate substantially no heat during use. Therefore, the other areas of the control module can be arranged above the IGBT module, and the chip area which generates heat is still attached to the heat dissipation partition plate through the heat conduction insulating material, so that the structure inside the converter can be compact without sacrificing the heat dissipation efficiency, and the manufacturing cost of the converter is reduced.

Optionally, the control module at least comprises a driving unit, a control unit and a power supply unit; and

the driving unit, the control unit and the power supply unit are coupled into the control module; or the driving unit, the control unit and the power supply unit may be independent units.

In the above embodiments, the control module may include an independent driving unit, a control unit and a power supply unit to realize power transformation of the converter. Furthermore, the control module may employ three-in-one plates of the driving unit, the control unit and the power supply unit in a coupled form, thereby achieving the effect of compact converter internal elements.

Optionally, the inverter is configured to control an electric machine.

In summary, according to the converter provided by the invention, the capacitor which is not packaged is integrally packaged on the heat dissipation partition plate of the box body through the heat conduction insulating material, so that the heat dissipation efficiency of the capacitor in the converter can be effectively improved. And, through adopting the electric capacity that does not encapsulate, can change the female setting mode of arranging of input mother and output of electric capacity, through the female mode of drawing out of the both sides side of arranging electric capacity input mother and output mother for electric capacity input mother can directly link with input supply socket, thereby has reduced the noise interference route between electric capacity input mother and the input supply socket, and then can effectively reduce stray inductance.

Drawings

Fig. 1 shows a side view of an embodiment of a current transformer according to the present invention.

Fig. 2 shows a front view of an embodiment of the current transformer according to the present invention.

Fig. 2A shows a cross-sectional view of portion a-a of fig. 2.

Fig. 2B shows a cross-sectional view of portion B-B of fig. 2.

Fig. 2C shows a cross-sectional view of section C-C of fig. 2.

Reference numerals

1: capacitor with a capacitor element

2: capacitor output bus bar

3: IGBT module

4: capacitor input bus bar

5: control module

510: chip area

6: output bus bar

7: input power socket

8: low-voltage communication socket

9: heat radiation medium joint

10: output three-phase socket

11: box body

1101: heat dissipation partition plate

1102: heat dissipation cavity

12: heat-conducting insulating gasket

13: thermally conductive insulating film

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure. While the invention will be described in connection with the preferred embodiments, there is no intent to limit its features to those embodiments. On the contrary, the invention is described in connection with the embodiments for the purpose of covering alternatives or modifications that may be extended based on the claims of the present invention. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The invention may be practiced without these particulars. Moreover, some of the specific details have been left out of the description in order to avoid obscuring or obscuring the focus of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Additionally, the terms "upper," "lower," "left," "right," "top," "bottom," "horizontal," "vertical" and the like as used in the following description are to be understood as referring to the segment and the associated drawings in the illustrated orientation. The relative terms are used for convenience of description only and do not imply that the described apparatus should be constructed or operated in a particular orientation and therefore should not be construed as limiting the invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, regions, layers and/or sections, these elements, regions, layers and/or sections should not be limited by these terms, but rather are used to distinguish one element, region, layer and/or section from another element, region, layer and/or section. Thus, a first component, region, layer or section discussed below could be termed a second component, region, layer or section without departing from some embodiments of the present invention.

While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the methodologies are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.

As described above, the present invention provides a converter for controlling a motor, which has a simple structure, good heat dissipation performance, and low cost.

The converter includes a case 11 and an electric component disposed inside the case 11. As described above, the inverter is an electrical component that rectifies and converts an input current or voltage into various types of current or voltage through an internal component and outputs the current or voltage. Referring to fig. 1, fig. 1 is a side view of a current transformer provided with various input ports and output ports according to the present invention. As shown in fig. 1, an input power socket 7, a low-voltage communication socket 8, a heat-dissipating medium connector 9, and an output three-phase socket 10 may be disposed on a case 11 of an embodiment of the converter according to the present invention.

The input power socket 7 is used for receiving current or voltage to be converted. The low-voltage communication socket 8 is used for being connected with a communication and control module and used for setting power transformation parameters of the converter. The heat medium interface 9 is used for inputting/outputting a heat medium. The output three-phase socket 10 is used to draw the converted voltage or current to the required place, and in one embodiment, the converter is used to control the motor, so that the output three-phase socket 10 is used to connect with the input port of the motor.

As shown in fig. 1, in the current transformer of the present invention, a case 11 is divided into a heat dissipation chamber and an element chamber by a heat dissipation partition 1101 (a dotted line portion in fig. 1). Wherein, a plurality of electric elements of the converter are all positioned in the element cavity, and a heat dissipation medium is communicated in the heat dissipation cavity through a heat dissipation medium joint 9.

It will be understood by those skilled in the art that the input power socket 7, the low-voltage communication socket 8, the heat-dissipating medium connector 9, the output three-phase socket 10 and the heat-dissipating medium may be implemented by existing or future technologies, and will not be described herein. The box 11 may be made of metal, so that the converter has a better heat dissipation effect. The material of the case 11 may be other materials used for manufacturing the converter case, which are existing or will be used in the art, and is not limited to metal.

As shown in fig. 1, the converter provided by the invention has a very simplified external structure and controllable manufacturing cost. The input and output ports of the converter box are simplified, and the connection with the preorder and subsequent devices is facilitated.

Referring to fig. 2, fig. 2 is a front view of a current transformer according to the present invention. In particular, fig. 2 mainly shows various electric components and their connection relationships in the component cavity of the current transformer provided by the present invention. As shown in fig. 2, the electric elements of the converter according to an embodiment of the present invention may include a capacitor 1, an IGBT module 3, a control module 5, and an output bus bar 6.

As shown in fig. 2, further, the capacitor 1 includes a capacitor main body, a capacitor input bus bar 4 and a capacitor output bus bar 2. The capacitor 1 adopted by the invention is an unpackaged capacitor, so that the capacitor input busbar 4 and the capacitor output busbar 2 of the capacitor can be respectively led out from the side edges of the two sides of the capacitor main body through design. In the above embodiment, since the capacitor input busbar 4 and the capacitor output busbar 2 are disposed on different sides, the capacitor input busbar 4 can be directly connected to the input power socket 7, and the capacitor output busbar 2 is directly connected to the input pin of the IGBT module 3. It should be particularly noted that the direct connection here means that the two ports are connected only by the lead wire and not by other electrical components, and the direct connection here means more that the two ports are directly connected by the pin.

In the above embodiment, the capacitor input busbar 4 is directly connected to the input power socket 7, so that a noise interference path between the capacitor input busbar 4 and the input power socket 7 is reduced, and further stray inductance can be effectively reduced. Because female row 2 of capacitor output directly links with IGBT module 3's input pin to can effectively reduce the female noise interference route of arranging 2 between 2 and the IGBT module 3 of capacitor output, and then can effectively reduce stray inductance. So that the converter has better electrical characteristics.

Preferably, the capacitor input busbar 4 and the capacitor output busbar 2 are both arranged by using a low-inductance busbar. Therefore, the stray inductance which is possibly caused can be reduced, and the converter has better electrical property. It should be understood by those skilled in the art that the above-mentioned low inductance Busbar (also called composite Busbar or laminated Busbar) is used as an intermediate component for integrating devices in a power electronic converter with higher power. The low-inductance bus is called a low-inductance bus because of low mutual inductance between parallel lines, and is mainly widely used in converters and inverters. The low-inductance busbar mainly comprises a conductor (generally a copper or aluminum plate), an insulator (0.1-0.3 mm insulating film), a support structure (an epoxy resin plate and other insulating materials), a connecting bolt and the like. It should be clear to those skilled in the art that the low inductance busbar can also be realized by existing or other means, but not limited to the above.

Further, in the above embodiment, the capacitor 1 is an unpackaged capacitor, and therefore, the capacitor 1 and the case 11 are fixed by encapsulating the capacitor 1 on the case 11. As shown in fig. 2, the body of the capacitor 1 and the wall of the case 11 may be connected by potting. Above-mentioned encapsulating material has heat conductivility and insulating properties concurrently, consequently, the main part of electric capacity can be through the heat conduction that the encapsulating material will produce to the tank wall of box 11, can open insulating effect simultaneously.

Further, referring to fig. 2C, fig. 2C is an enlarged cross-sectional view of a portion C-C shown in fig. 2, and it can be seen from fig. 2C that the main portion of the capacitor 1 is integrally encapsulated with the heat dissipation partition 1101 of the box 11 by the potting compound, as described above, the potting compound has both heat conductivity and insulation performance, so that the main portion of the capacitor can conduct the generated heat to the heat dissipation partition 1101 through the potting compound and further to the heat dissipation medium in the heat dissipation cavity 1102.

Therefore, the converter provided by the invention can effectively improve the heat dissipation efficiency of the capacitor in the converter.

As shown in fig. 2, the IGBT module 3 is attached to the heat dissipation partition 1101 through a heat conductive insulating material, so that the core component IGBT module 3 of the converter can dissipate heat to the heat dissipation cavity in time through the heat conductive insulating material. The control module 5 is arranged above the IGBT module 3, and therefore the above-mentioned IGBT module 3 is shown in dashed line form in fig. 2.

The control module 5 at least comprises a driving unit, a control unit and a power supply unit, the control module 5 is connected with the low-voltage communication socket 8 and used for communicating with the outside, receiving the power transformation parameters of the converter and controlling and integrating other electrical elements to enable the converter to work according to the received power transformation parameters.

In one embodiment, the driving unit, the control unit and the power supply unit included in the control module 5 may be three-in-one plates in a coupled manner. Through the mode of coupling drive unit, the control unit, power supply unit together, can make control module 5's structure more compact to reduce the converter inner space that occupies, reduce the manufacturing cost of converter.

It will be appreciated by those skilled in the art that the drive unit, the control unit and the power supply unit included in the control module 5 may also be provided in other forms, not limited to the three-in-one plate of the above-described coupling form.

The main heat source of the control module 5 is the chip area of the control module, while the other areas of the control module generate substantially no heat during use. Therefore, in the embodiment shown in fig. 2, the other region of the control module is disposed above the IGBT module 3, and the heat-generating chip region (corresponding to the portion a-a in fig. 2) is still attached to the heat-dissipating partition 1101 through the heat-conducting insulating material, so that the structure inside the converter can be made compact without sacrificing the heat-dissipating efficiency, and the manufacturing cost of the converter can be reduced.

Fig. 2A further shows a cross-sectional view of portion a-a of fig. 2. As shown in fig. 2A, the chip region 510 of the control module 5 is attached to the heat dissipation partition 1101 of the box 11 through the heat conductive insulating pad 12, so that heat generated in the use process can be effectively conducted to the heat dissipation cavity 1102 through the heat conductive insulating pad 12, and the heat dissipation effect of the converter is further improved.

As shown in fig. 2, the output port of the IGBT module 3 is connected to the output three-phase socket 10 of the converter through an output bus bar 6. Preferably, the output bus bar 6 is arranged by adopting a low-inductance bus bar, so that stray inductance possibly caused can be reduced, and the converter has better electrical characteristics. It should be understood by those skilled in the art that the above-mentioned low-inductance busbar (also called composite busbar or laminated busbar) is used as an intermediate component for integrating devices in a power electronic converter with higher power. The low-inductance bus is called a low-inductance bus because of low mutual inductance between parallel lines, and is mainly widely used in converters and inverters. The low-inductance busbar mainly comprises a conductor (generally a copper or aluminum plate), an insulator (0.1-0.3 mm insulating film), a support structure (an epoxy resin plate and other insulating materials), a connecting bolt and the like. It should be clear to those skilled in the art that the low inductance busbar can also be realized by existing or other means, but not limited to the above.

In the above embodiment, the output bus bar 6 is attached to the heat dissipation partition plate through a heat conductive insulating material, and fig. 2B further shows a cross-sectional view of a portion B-B in fig. 2.

As shown in fig. 2B, the output busbar 6 includes a plurality of layers of parallel conductors, the plurality of layers of conductors are spaced by the heat-conducting insulating film 13, and the output busbar 6 is attached to the heat-dissipating partition 1101 of the box 11 by the heat-conducting insulating gasket 12, so that heat generated by the output busbar 6 in the using process can be effectively conducted to the heat-dissipating cavity 1102 by the heat-conducting insulating gasket 12, and the heat-dissipating effect of the converter is further improved.

Both the thermally conductive and insulating spacer 12 and the thermally conductive and insulating film 13 may be made of a thermally conductive and insulating material. The thermally conductive and insulating Material may include a Phase Change Material (PCM-Phase Change Material) which is a substance that changes physical properties with a Change in temperature and provides latent heat. The process of changing physical properties is called a phase change process, and in this case, the phase change material absorbs or releases a large amount of latent heat. Once the material is widely applied to human life, the material becomes an optimal green and environment-friendly carrier for energy conservation and environmental protection. Phase change materials have the ability to change their physical state over a range of temperatures. Taking the solid-liquid phase as an example, when the material is heated to the melting temperature, the phase change from the state to the liquid state is generated, and in the melting process, the phase change material absorbs and stores a large amount of latent heat; when the phase change material is cooled, the stored heat is dissipated to the environment within a certain temperature range, and reverse phase change from liquid to solid is carried out. In both phase change processes, the stored or released energy is called latent heat of phase change. When the physical state changes, the temperature of the material is almost kept unchanged before the phase change is completed, a wide temperature platform is formed, and although the temperature is unchanged, the latent heat absorbed or released is quite large.

The phase change material may include paraffin wax having a solid-liquid phase change or a composite material including paraffin wax. It will be appreciated by those skilled in the art that the phase change material described above may be provided by other materials now known or to be available, not limited to paraffin.

By adopting the phase-change material, the chip region 4 of the IGBT module 3 and the control module 5 and the output busbar 6 of the converter are attached to the heat dissipation partition 1101, so that heat generated by the chip region 4 of the IGBT module 3 and the control module 5 and the output busbar 6 in the using process can be absorbed by the phase-change material in a large amount. And because the heat absorbed by the phase-change material in the phase-change process is mostly used for phase change of substances and the heat absorbed by the phase-change material is rarely used for temperature rise, the temperature of the phase-change material is raised slightly when the phase-change material is changed, the integral temperature rise of the converter is slowed, the heat is dissipated for a sufficient time of the heat dissipation cavity, and the heat dissipation effect of the converter is improved.

Based on the structure, the box body and the capacitor of the converter are integrally manufactured, the heat generated by the capacitor can be completely led into the box wall and the heat dissipation cavity of the box body, the cost is saved, the heat dissipation efficiency of the capacitor is improved, and the heat dissipation efficiency of the converter is further improved.

The capacitor input busbar is directly connected with the input power socket, so that intermediate transmission paths are reduced, the cost is reduced, and stray inductance is effectively reduced.

The better trinity board of chooseing for use of control template to pass through the laminating of heat conduction insulating pad with the chip that generates heat and the heat dissipation cavity of trinity board, improve chip radiating efficiency, and then improve the radiating efficiency of converter.

The output busbar adopts the low-inductance busbar, stray inductance is effectively reduced, the output busbar is attached to the heat dissipation cavity through the heat conduction insulating gasket, the heat dissipation efficiency of the busbar is improved, and the heat dissipation efficiency of the converter is further improved.

In conclusion, the converter provided by the invention can effectively reduce the temperature rise inside the converter and improve the use reliability of the converter. The converter provided by the invention is simple to manufacture, low in cost, good in heat dissipation performance, capable of effectively controlling the temperature of the operation environment and easy to realize.

Furthermore, the converter provided by the invention can be applied to various required scenes. And more particularly, to controlling an electric motor. It should be appreciated by those skilled in the art that the above-described application for controlling the motor is only an example of an application scenario of the converter, and is not a limitation of the application scenario of the converter provided by the present invention.

Those skilled in the art will appreciate that the electrical transformation parameters described in the above embodiments may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can comprise RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a web site, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, Digital Subscriber Line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk (disk) and disc (disc), as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy disk and blu-ray disc where disks (disks) usually reproduce data magnetically, while discs (discs) reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

Further, the drive units, control units, and power supply units described in the above embodiments may be implemented or performed with a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

The previous description of the disclosure is provided to enable any person skilled in the art to make or use the disclosure. Various modifications to the disclosure will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other variations without departing from the spirit or scope of the disclosure. Thus, the disclosure is not intended to be limited to the examples and designs described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A converter comprises a box body and an electric element arranged in the box body, and is characterized in that the electric element at least comprises a capacitor, the capacitor comprises a capacitor main body, a capacitor input bus and a capacitor output bus, and the capacitor input bus and the capacitor output bus are respectively led out from different sides of the capacitor main body;

a heat dissipation cavity and an element cavity which are separated by a heat dissipation partition plate are arranged in the box body, the capacitor is positioned in the element cavity, and the capacitor is integrally packaged on the heat dissipation partition plate through a first heat conduction insulating material; and

and an input power socket of the converter is arranged on the box wall of the box body, and the capacitor input busbar is directly connected with the input power socket.

2. The current transformer of claim 1, wherein the first thermally conductive and insulating material is potting compound, and the capacitor is integrally encapsulated in the heat dissipating partition by potting compound.

3. The converter according to claim 1, wherein the capacitor input busbar and the capacitor output busbar are low inductance busbars.

4. The current transformer of claim 1, wherein the electrical components further comprise an IGBT module located in the component cavity and attached to the heat dissipating partition by a second thermally conductive and insulating material, the first thermally conductive and insulating material being different from the second thermally conductive and insulating material; and

the capacitor output busbar is directly connected with the input end of the IGBT module.

5. The converter according to claim 4, wherein an output three-phase socket of the converter is arranged on a wall of the box body, and the IGBT module and the output three-phase socket are connected through an output busbar.

6. The converter according to claim 5, wherein the output bus bar is a low inductance bus bar, and the output bus bar is attached to the heat dissipation partition plate through the second heat conductive insulating material.

7. The current transformer of claim 4, wherein the electrical component further comprises a control module, the control module being located in the component cavity, a chip area of the control module being attached to the heat sink spacer by the second thermally conductive insulating material.

8. The converter of claim 7, wherein said IGBT module is between said other region of said control module and said heat sink spacer.

9. The converter according to claim 7, wherein the control module comprises at least a drive unit, a control unit and a power supply unit; and

the driving unit, the control unit and the power supply unit are coupled into the control module; or the driving unit, the control unit and the power supply unit are independent units.

10. The converter according to any of claims 1-9, wherein the converter is used to control an electric machine.

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