Inverter, motor control system and vehicle

Abstract

The invention discloses an inverter, a motor control system and a vehicle, and belongs to the technical field of inverters. The inverter comprises a shell, and a filter, a capacitor, a power module, a wire holder and a driving control board which are arranged on the shell, the filter, the capacitor, the power module and the wire holder are electrically connected in sequence, and the driving control board is electrically connected with the power module; the filter comprises a plurality of devices; the shell is provided with a cavity, the filter is arranged in the cavity, and the cavity is filled with pouring sealant to fix the filter; a heat dissipation part is arranged at the bottom of the cavity, the shape of the heat dissipation part is matched with the shapes of the devices, and the heat dissipation part is used for dissipating heat of the devices. According to the inverter, the motor control system and the vehicle, integrated assembly is achieved, independent devices are combined into an integral structure, the matching size between the devices is eliminated, and the assembly error between the devices is reduced; therefore, the performance of the device is improved, the performance of the whole machine is further improved, and the service life is prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of inverters, in particular to an inverter, a motor control system and a vehicle. BACKGROUND

[0002] An inverter is a converter that converts direct current (batteries, storage batteries) into fixed frequency and fixed voltage or frequency and voltage adjustable alternating current (generally 220V, 50Hz sine wave). It is widely used in scenes that require alternating current. Taking a motor control system as an example, an inverter connects a direct current power supply and an alternating current motor, and its performance directly determines the accuracy, efficiency and reliability of motor control. In the existing motor control system, capacitors and filters are modularized as single product modules, and then assembled. However, on the one hand, there is a long size chain between different devices, the assembly error is large, and the assembly efficiency is low; on the other hand, the heat dissipation is poor, the overall temperature is high, thereby affecting the overall performance and service life. SUMMARY

[0003] The purpose of the present application is to provide an inverter, a motor control system and a vehicle, integrated assembly, combining independent devices into a whole structure, eliminating the matching size between devices, reducing the assembly error between devices; improving the heat dissipation of the device, improving the performance of the device, and thus improving the overall performance and prolonging the service life.

[0004] To achieve this purpose, the present application adopts the following technical solutions:

[0005] An inverter, comprising a shell and a filter, a capacitor, a power module, a wiring seat and a drive control board arranged on the shell, the filter, the capacitor, the power module and the wiring seat are electrically connected in sequence, and the drive control board is electrically connected with the power module;

[0006] The filter comprises a plurality of devices;

[0007] The shell is provided with a cavity, the filter is arranged in the cavity, the cavity is filled with potting glue to fix the filter; the bottom of the cavity is provided with a heat dissipation part, the shape of the heat dissipation part is matched with the shape of the plurality of devices, and the heat dissipation part is used for dissipating heat of the devices.

[0008] In some possible embodiments, the plurality of devices are arranged along a first direction, and the heat dissipation part comprises a plurality of heat dissipation platforms, and the shapes of the plurality of heat dissipation platforms are matched with the shapes of the plurality of devices one by one.

[0009] In some possible embodiments, the filter comprises a direct current copper bar, and the plurality of devices are arranged along the extension direction of the direct current copper bar.

[0010] In some possible embodiments, the plurality of devices comprise:

[0011] The capacitor plate comprises a circuit board and a capacitor arranged on the circuit board, the circuit board and the DC copper bar are electrically connected, and the shape of the heat dissipation part is matched with the shape of the capacitor.

[0012] The magnetic core structure is arranged in the DC copper bar, and the shape of the heat dissipation part is matched with the shape of the magnetic core structure.

[0013] In some possible embodiments, the power taking pins of the capacitor plate and the DC copper bar are welded to realize the electrical connection.

[0014] In some possible embodiments, the capacitor plate is provided with the capacitor on both sides of the DC copper bar along the second direction, and the shape of the heat dissipation part is matched with the shape of the capacitor on one side, the shape of the DC copper bar and the shape of the capacitor on the other side along the second direction respectively.

[0015] In some possible embodiments, the filter and the capacitor are connected in the form of copper bar through laser welding; and / or, the capacitor and the power module are connected in the form of copper bar through laser welding; and / or, the power module and the terminal seat are connected in the form of copper bar through laser welding; and / or, the drive control board and the PIN pin of the power module are welded.

[0016] In some possible embodiments, the drive control board is used to detect the current state of the three-phase copper bar on the terminal seat.

[0017] In some possible embodiments, the terminal seat comprises a mounting shell, a three-phase copper bar and an insulating film, the three-phase copper bar is provided with a detection part, the three-phase copper bar is arranged in the mounting shell and the detection part is exposed to the mounting shell, the insulating film covers the detection part to isolate the drive control board, and the detection part is used to cooperate with the drive control board to detect the current state.

[0018] In some possible embodiments, the detection part is a notch recessed from the edge to the inner side along the width direction of the three-phase copper bar, and the detection part is used to cooperate with the current sensor on the drive control board to detect the current state.

[0019] In some possible embodiments, the detection part comprises two notches arranged symmetrically along the center line of the three-phase copper bar in the width direction, and the notches do not exceed the center line.

[0020] In some possible embodiments, the mounting shell and the drive control board are connected through fasteners.

[0021] In some possible implementation manners, the potting glue is a heat-conducting glue, and the heat-conducting glue is filled between the heat-dissipating part and the device; or, a heat-conducting pad is further arranged between the heat-dissipating part and the device.

[0022] An inverter comprises a housing, a filter, a capacitor, a power module, a terminal block and a control board arranged on the housing, the filter, the capacitor, the power module and the terminal block are electrically connected in sequence, and the control board is electrically connected with the power module.

[0023] The terminal block comprises a mounting shell, a three-phase copper bar and an insulating film, the three-phase copper bar is provided with a detection part, the three-phase copper bar is arranged in the mounting shell and the detection part is exposed from the mounting shell, and the insulating film covers the detection part to isolate the control board; the detection part is used for cooperating with the control board to detect the current state on the three-phase copper bar.

[0024] An electric machine control system comprises the inverter according to any one of the above.

[0025] A vehicle comprises the electric machine control system according to the above.

[0026] The inverter, the electric machine control system and the vehicle have the following beneficial effects:

[0027] The inverter, the electric machine control system and the vehicle have the following beneficial effects: BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the inverter from one perspective according to the embodiment of the present application;

[0029] Figure 2 is an exploded view of the inverter according to the embodiment of the present application;

[0030] Figure 3 is a schematic diagram of the inverter from another perspective according to the embodiment of the present application;

[0031] Figure 4 is a schematic diagram of the housing from one perspective according to the embodiment of the present application;

[0032] Figure 5is a top view of the inverter provided by the embodiment of the present application;

[0033] Figure 6 is Figure 5 A-A sectional view of the inverter provided by the embodiment of the present application;

[0034] Figure 7 is Figure 5 B-B sectional view of the inverter provided by the embodiment of the present application;

[0035] Figure 8 is a schematic view of the second cavity provided by the embodiment of the present application;

[0036] Figure 9 is an exploded view of the filter provided by the embodiment of the present application;

[0037] Figure 10 is a schematic view of the capacitor provided by the embodiment of the present application;

[0038] Figure 11 is a schematic view of the shell from another perspective provided by the embodiment of the present application;

[0039] Figure 12 is an exploded view of the terminal block provided by the embodiment of the present application.

[0040] in the figure:

[0041] 1, shell; 101, first cavity; 102, second cavity; 103, isolation barrier; 104, communication groove; 105, first fixing column; 106, second fixing column; 107, liquid inlet; 108, liquid outlet; 109, first heat dissipation platform; 1091, third heat dissipation platform; 1092, fifth heat dissipation platform; 110, second heat dissipation platform; 111, heat dissipation boss; 112, fourth heat dissipation platform; 113, grounding column; 114, perforation; 115, window; 116, first sealing surface; 117, blind hole; 118, mounting groove; 119, sealing groove; 120, cavity; 121, heat dissipation part;

[0042] 2, filter; 201, first-stage capacitor plate; 202, nanocrystalline magnetic ring; 203, third-stage capacitor plate; 2031, circuit board; 2032, capacitor; 204, ferrite magnetic core; 205, fifth-stage capacitor plate; 206, direct-current copper bar; 207, magnetic ring fixing shell; 208, baffle; 209, power supply pin; 210, cover plate;

[0043] 3, capacitor; 301, capacitor core; 302, positive copper bar; 3021, positive pin; 303, negative copper bar; 3031, negative pin; 304, base; 3041, second sealing surface; 320, electrode;

[0044] 4, power module; 401, heat sink;

[0045] 5, terminal block; 501, mounting shell; 502, three-phase copper bar; 503, insulation film; 504, notch; 505, avoiding opening; 506, mounting hole;

[0046] 6, drive board;

[0047] 7, sealing element;

[0048] 8, fastener;

[0049] 1M, cooling channel; 1N, cooling space. DETAILED DESCRIPTION

[0050] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects reached more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0051] In the description of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0052] In the present application, unless otherwise explicitly specified and limited, the first feature "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "under", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0053] As Figures 1-3As shown, the embodiment provides an inverter, which comprises a shell 1, and a filter 2 and a capacitor 3 arranged on the shell 1, and the filter 2 and the capacitor 3 are integratedly arranged on the shell 1. The shell 1 is provided with a cavity 120, and the capacitor 3 and the filter 2 are accommodated in the cavity 120, and the cavity 120 is filled with potting glue to fix the capacitor 3 and the filter 2, and after potting, the shell 1, the filter 2 and the capacitor 3 become an integrated structure. Through integrated assembly of the shell 1, the filter 2 and the capacitor 3, the independent devices are combined into an integrated structure, the matching size between the devices is eliminated, and the assembly error between the devices is reduced. Instead of the assembly in the form of a single product module in the prior art, the problems of complex assembly, long size chain and large assembly error caused by too many devices are effectively improved.

[0054] The inverter further comprises a power module 4, a terminal block 5 and a drive control board 6 arranged on the shell 1, which further improves the integration degree and solves the problem of complex assembly.

[0055] The filter 2, the capacitor 3, the power module 4 and the terminal block 5 are electrically connected in sequence, and the drive control board 6 is electrically connected with the power module 4. The filter 2 is connected with direct current, the filter 2 and the capacitor 3 are used to provide stable direct current input, the power module 4 is used to realize energy form conversion, the drive control board 6 is used to accurately control the power module 4 to ensure the quality of output alternating current, and the terminal block 5 is connected with an electrical equipment to realize external transmission of power. The specific working principle can refer to the prior art, and will not be described here.

[0056] The power module 4 and the terminal block 5 are arranged on one side of the shell 1, the filter 2 and the capacitor 3 are arranged on the other side of the shell 1, and the drive control board 6 is arranged on the side of the power module 4 and the terminal block 5 away from the filter 2 and the capacitor 3. In the embodiment, the width direction of the inverter is taken as the first direction, the length direction is taken as the second direction, and the vertical direction is taken as the third direction. Along the third direction, the drive control board 6, the power module 4 and the terminal block 5 arranged on the same layer, the shell 1, the filter 2 and the capacitor 3 arranged on the same layer are arranged in sequence. Through the above arrangement, the structure is compact, the volume is small, and the electrical connection between the modules is facilitated.

[0057] As shown in the drawings, Figure 2 and Figure 7As shown, the embodiment provides an inverter, the shell 1 is further provided with a cooling channel 1M, the cooling channel 1M and the cavity 120 are respectively arranged on two sides of the shell 1, the shell 1 realizes the cooling function by arranging the cooling channel 1M, and the drive control board 6, the power module 4, the terminal block 5, the filter 2 and the capacitor 3 connected to the shell 1 are cooled. On the one hand, the problem of high heat generation is solved, thereby improving the overall performance and prolonging the service life. On the other hand, the drive control board 6, the power module 4, the terminal block 5, the filter 2 and the capacitor 3 share the same shell 1 for cooling, avoiding separate cooling settings, thereby simplifying the structure.

[0058] The shell 1 is further provided with a communication groove 104 and a liquid inlet 107 and a liquid outlet 108 which are both communicated with the communication groove 104; the power module 4 is arranged on the shell 1, the power module 4 and the communication groove 104 form a cooling space 1N, and the cooling space 1N is communicated with the liquid inlet 107 and the liquid outlet 108 to form a cooling channel 1M. The liquid inlet 107 and the liquid outlet 108 are respectively connected with external structures to realize the circulation of the cooling liquid in the cooling channel 1M, the cooling liquid enters from the liquid inlet 107, passes through the cooling space 1N to take away the heat generated by high-power devices such as the filter 2, the capacitor 3 and the power module 4, and then flows out from the liquid outlet 108.

[0059] The power module 4 and the communication groove 104 jointly form the cooling space 1N, that is, part of the cooling channel 1M, the structure of the power module 4 is fully utilized, and the structure is further simplified, and the space utilization rate is high. Moreover, the power module 4 itself serves as part of the cooling channel 1M, and the cooling effect of the power module 4 is improved.

[0060] The power module 4 includes a heat sink 401, the heat sink 401 and the communication groove 104 form the cooling space 1N, and the heat sink 401 includes a substrate and heat dissipation fins arranged on the substrate, thereby further improving the cooling effect of the power module 4.

[0061] The inverter further includes a sealing member 7, and the power module 4 is sealingly connected to the shell 1 through the sealing member 7. Illustratively, the shell 1 is provided with a sealing groove 119 at the groove opening of the communication groove 104 on the upper side, the sealing member 7 is a sealing ring, the sealing ring is arranged in the sealing groove 119, and the power module 4 and the shell 1 sandwich the sealing ring, thereby realizing the sealing connection of the power module 4 and the shell 1 through the sealing ring, forming a closed cooling space 1N, and preventing the cooling liquid in the cooling channel 1M from leaking.

[0062] The power module 4 is connected to the shell 1 through screws.

[0063] The power module 4 and the capacitor 3 are arranged on two sides of the cooling channel 1M along the third direction, for heat dissipation of the power module 4 and the capacitor 3.

[0064] The shell 1 is formed by cast aluminum process, and the heat conduction performance is increased.

[0065] As shown in Figures 1-6 , Figure 8 and Figure 9 , the embodiment provides an inverter, the filter 2 comprises a plurality of devices; the filter 2 is arranged in the cavity 120, and the cavity 120 is filled with potting glue to fix the filter 2. The cavity 120 of the shell 1 is provided with a heat dissipation part 121, the shape of the heat dissipation part 121 is matched with the shape of the plurality of devices, and the heat dissipation part 121 is used for dissipating heat of the devices. The shape of the heat dissipation part 121 is matched with the shape of the plurality of devices, so that the plurality of devices can be sufficiently cooled, thereby improving the performance and service life of the whole machine.

[0066] The potting glue is heat-conducting glue, and the heat-conducting glue is filled between the heat dissipation part 121 and the devices; or, the inverter further comprises a heat-conducting pad, the heat-conducting pad is arranged between the heat dissipation part 121 and the devices, and the heat-conducting glue or the heat-conducting pad is used for heat conduction between the devices and the heat dissipation part 121, so as to ensure the heat dissipation effect of the devices.

[0067] The plurality of devices are arranged along a first direction, the heat dissipation part 121 comprises a plurality of heat dissipation platforms, and the shapes of the plurality of heat dissipation platforms are matched with the shapes of the plurality of devices one by one. The plurality of devices are arranged along a straight line direction, so that the plurality of heat dissipation platforms can be correspondingly arranged, so that the plurality of heat dissipation platforms and the plurality of devices are correspondingly matched.

[0068] The filter 2 comprises a direct-current copper bar 206, and the plurality of devices are arranged along the extension direction of the direct-current copper bar 206. Optionally, the direct-current copper bar 206 is arranged along the first direction, so that the plurality of devices are arranged along the first direction. The plurality of devices comprise a capacitor plate and a magnetic core structure, the capacitor plate comprises a circuit board 2031 and a capacitor 2032 arranged on the circuit board 2031, the circuit board 2031 is electrically connected with the direct-current copper bar 206, and the direct-current copper bar 206 is arranged in the magnetic core structure, so that the capacitor plate is connected with the direct-current copper bar 206, and the structure between the direct-current copper bar 206 and the plurality of devices is more compact. Optionally, the shape of the heat dissipation part 121 is matched with the shape of the capacitor 2032, and the shape of the heat dissipation part 121 is matched with the shape of the magnetic core structure. Further, the circuit board 2031 and the direct-current copper bar 206 are electrically connected by welding of power supply pins 209.

[0069] In an embodiment, the filter 2 is a five-stage filter, and in other embodiments, the number of stages can be increased or decreased according to actual EMC level requirements. The five-stage filter includes a first-stage capacitor plate 201, a nanocrystalline magnetic ring 202, a third-stage capacitor plate 203, a ferrite magnetic core 204, and a fifth-stage capacitor plate 205 arranged in sequence along the DC copper bar 206. The first-stage capacitor plate 201, the third-stage capacitor plate 203, and the fifth-stage capacitor plate 205 each include a circuit board 2031 and a capacitor 2032 disposed on the circuit board 2031. The filter 2 further includes a magnetic ring fixing shell 207 and a cover plate 210, the DC copper bar 206 passes through the magnetic ring fixing shell 207 and the cover plate 210, the nanocrystalline magnetic ring 202 is installed in a containing space formed by the magnetic ring fixing shell 207 and the cover plate 210, and the cover plate 210 and the magnetic ring fixing shell 207 are sealed by dispensing. The heat dissipation part 121 is adaptively arranged with the first-stage capacitor plate 201, the nanocrystalline magnetic ring 202, the third-stage capacitor plate 203, the ferrite magnetic core 204, and the fifth-stage capacitor plate 205, thereby achieving heat dissipation of the corresponding devices. Correspondingly, the heat dissipation part 121 includes a first heat dissipation platform 109, a second heat dissipation platform 110, a third heat dissipation platform 1091, a fourth heat dissipation platform 112, and a fifth heat dissipation platform 1092 arranged in a first direction, i.e., the extension direction of the DC copper bar 206, and correspond to the first-stage capacitor plate 201, the nanocrystalline magnetic ring 202, the third-stage capacitor plate 203, the ferrite magnetic core 204, and the fifth-stage capacitor plate 205, respectively, and exchange heat through heat-conducting glue or heat-conducting pads. The DC copper bar 206 and the magnetic ring fixing shell 207 are integrally formed. The ferrite magnetic core 204 is fixed on the fourth heat dissipation platform 112 in the cavity 120 through heat dissipation glue or heat-conducting pads.

[0070] The capacitor 2032 is disposed on both sides of the DC copper bar 206 along a second direction. The shape of the heat dissipation part 121 along the second direction is adapted to the shape of the capacitor 2032 on one side, the shape of the DC copper bar 206, and the shape of the capacitor 2032 on the other side, thereby achieving heat dissipation of the capacitors 2032 on both sides and the DC copper bar 206. Effective heat dissipation of the DC copper bar 206 can improve the current-carrying capacity. Taking the third capacitor plate as an example, the heat dissipation part 121 includes two third heat dissipation platforms 1091 and a heat dissipation boss 111 disposed between the two third heat dissipation platforms 1091. The heat dissipation boss 111 is adapted to the DC copper bar 206. The two third heat dissipation platforms 1091 correspond to the capacitors 2032 on both sides of the DC copper bar 206 on the third-stage capacitor plate 203.

[0071] Optionally, the capacitors include a plurality of X capacitors and a plurality of Y capacitors, which can be set according to the requirements of the prior art.

[0072] The cavity 120 further includes a grounding column 113, and the circuit board 2031 includes a grounding hole. The grounding column 113 and the grounding hole are connected by a screw, so that the Y capacitors 2032 on the circuit board 2031 are effectively grounded, thereby enhancing the EMC effect.

[0073] The embodiment provides an inverter, the cavity 120 is provided with the window 115, the direct-current copper bar 206 is sealingly arranged on the baffle 208, and the baffle 208 is sealingly connected to the window 115 to seal the cavity 120, so that the sealing property of the cavity 120 is ensured, and overflow of the pouring sealant is blocked and separated.

[0074] As shown in Figures 2-5 , Figure 10 and Figure 11 , the embodiment provides an inverter, the cavity 120 of the shell 1 is provided with the first sealing surface 116 and is provided with the perforation 114. The capacitor 3 comprises a base 304 and an electrode 320 protruding from the base 304, and the base 304 is provided with a second sealing surface 3041. The capacitor 3 is accommodated in the cavity 120, the electrode 320 is arranged through the perforation 114, and the first sealing surface 116 and the second sealing surface 3041 are attached to seal the cavity 120. During assembly, the capacitor 3 is loaded into the cavity 120, the electrode 320 is arranged through the perforation 114, and the first sealing surface 116 and the second sealing surface 3041 are attached, and then the pouring sealant is filled. The first sealing surface 116 and the second sealing surface 3041 are attached to seal the cavity 120, so as to block and separate the overflow of the pouring sealant.

[0075] The electrode 320 comprises a positive electrode and a negative electrode, the capacitor 3 further comprises a capacitor core 301, a positive copper bar 302 and a negative copper bar 303, two ends of the capacitor core 301 are respectively welded to the positive copper bar 302 and the negative copper bar 303, and the positive copper bar 302 and the negative copper bar 303 are simultaneously connected to the positive electrode and the negative electrode on the base 304 by laser welding. Three groups of electrodes 320 are arranged in sequence and flush on the base 304, and are used for electrically connecting with the power module 4. The capacitor 3 is filled into the cavity 120 of the shell 1 by the capacitor core 301, the positive copper bar 302 and the negative copper bar 303 through the pouring sealant. Since the shell 1 has the cooling channel 1M with a cooling function, the capacitor core 301 is directly installed in the shell 1 with the cooling function, the distance between the capacitor core 301 and the cooling channel 1M is closer, the heat conduction path is reduced, the heat dissipation effect of the capacitor core 301 is greatly improved, and the capacitor core 301 is a device greatly affected by heat, so that the performance and service life of the capacitor core 301 are increased. Moreover, the pouring sealant is a heat-conducting glue with a heat conduction function, the capacitor 3 can exchange heat with the shell 1 through the pouring sealant, and the heat dissipation effect is ensured.

[0076] The side wall of the cavity 120 is provided with a blind hole 117, and the fastener 8 passes through the base 304 to be connected with the blind hole 117, so that the base 304 is connected to the shell 1. The blind hole 117 is like a threaded hole, and the fastener 8 is a screw. After the screw passes through the hole on the base 304, it is screwed with the blind hole 117, thereby realizing the connection of the base 304 and the shell 1, preventing the stable installation of the capacitor 3, and preventing the overflow of the potting glue. Further, a plurality of blind holes 117 are arranged around the first sealing surface 116, and the through hole 114 is arranged at the middle position of the first sealing surface 116.

[0077] The cavity 120 is provided with a mounting groove 118, the first sealing surface 116 and the through hole 114 are arranged on the groove bottom of the mounting groove 118, and the base 304 is arranged in the mounting groove 118, which is convenient for identifying and manufacturing the first sealing surface 116. In addition, the mounting groove 118 has a limiting function, which can limit the base 304 in the circumferential direction, thereby ensuring the stability of the installation.

[0078] The embodiment provides an inverter, and the cavity 120 comprises a first cavity 101 and a second cavity 102; the capacitor 3 and the filter 2 are correspondingly accommodated in the first cavity 101 and the second cavity 102, and the capacitor 3 and the filter 2 are respectively sealed and installed in the first cavity 101 and the second cavity 102; the first cavity 101 is filled with potting glue to fix the capacitor 3, and the second cavity 102 is filled with potting glue to fix the filter 2. Compared with the case that the capacitor 3 and the filter 2 are arranged in the same cavity 120, the capacitor 3 and the filter 2 are arranged in the first cavity 101 and the second cavity 102 respectively, the capacitor 3 is sealed and connected with the first cavity 101, the filter 2 is sealed and connected with the second cavity 102, and the first cavity 101 and the second cavity 102 are respectively sealed, so that the mutual interference is avoided, and the sealing of the first cavity 101 and the second cavity 102 is respectively ensured. If the first cavity 101 leaks, the installation of the filter 2 in the second cavity 102 will not be affected, and the subsequent maintenance and repair of the capacitor 3 and the filter 2 can be facilitated.

[0079] The first cavity 101 and the second cavity 102 are arranged on the same side of the shell 1, and the first cavity 101 and the second cavity 102 are arranged in a separated mode by the isolation barrier 103. During assembly, the capacitor 3 and the filter 2 are arranged in the first cavity 101 and the second cavity 102 respectively, and then the potting glue is poured at one time. Compared with the case that the first cavity 101 and the second cavity 102 are arranged on the upper and lower sides of the shell 1 and need to be poured with potting glue separately, the process is saved.

[0080] Correspondingly, the first cavity 101 is provided with a first sealing surface 116 and a through hole 114; the capacitor 3 comprises a base 304 and an electrode 320 protruding from the base 304, and the base 304 is provided with a second sealing surface 3041; the electrode 320 penetrates the through hole 114, and the first sealing surface 116 and the second sealing surface 3041 are attached to seal the first cavity 101. The side wall of the first cavity 101 is provided with a blind hole 117, and the fastener 8 penetrates the base 304 to connect with the blind hole 117, so that the base 304 is connected to the shell 1, ensuring the sealing of the first cavity 101, and preventing the overflow of the pouring glue.

[0081] The first cavity 101 is provided with a mounting groove 118, and the first sealing surface 116 and the through hole 114 are arranged on the groove bottom of the mounting groove 118, and the base 304 is arranged in the mounting groove 118, which facilitates the identification and manufacturing of the first sealing surface 116. In addition, the mounting groove 118 has a limiting function, which can limit the base 304 in the circumferential direction, ensuring the stability of the installation.

[0082] The second cavity 102 is provided with a window 115; the filter 2 comprises a direct current copper bar 206, the direct current copper bar 206 penetrates the baffle 208 in a sealed manner, and the baffle 208 is connected to the window 115 in a sealed manner to seal the second cavity 102, ensuring the sealing of the cavity 120, and preventing the overflow of the pouring glue.

[0083] As shown in Figure 1 , Figure 2 , Figure 11 and Figure 12 , the embodiment provides an inverter, and the terminal block 5 comprises a mounting shell 501, a three-phase copper bar 502 and an insulating film 503. The three-phase copper bar 502 is provided with a detection part, the three-phase copper bar 502 is arranged in the mounting shell 501, and the detection part is exposed outside the mounting shell 501. The insulating film 503 covers the detection part to isolate the drive control board 6. The detection part is used in cooperation with the drive control board 6 to detect the current state on the three-phase copper bar 502, so as to ensure the safety and reliability of the current output by the inverter, prevent the risk of device burning or system collapse caused by abnormal three-phase current, and facilitate the management and accurate control of the output current. By pasting the insulating film 503 on the top of the detection part, the detection part of the three-phase copper bar 502 is covered and wrapped to avoid being exposed on the surface outside the mounting shell 501, so as to isolate the electrical gap with the drive control board 6. Compared with the traditional three-phase fixed block with a core feature, the three groups of core materials are reduced, the volume is greatly reduced, the forming process becomes simpler and more efficient, and the cost is also reduced.

[0084] Exemplarily, the three-phase copper bar 502 is embedded in the mounting shell 501, and the mounting shell 501 is provided with a avoiding opening 505 for exposing the detection part. The mounting shell 501 is a plastic shell, and the three-phase copper bar 502 and the mounting shell 501 are integrally formed by injection molding.

[0085] In an embodiment, the detection part is a notch 504 recessed from the edge to the inner side along the width direction of the three-phase copper bar 502, and the detection part is used to cooperate with the current sensor on the drive control board 6 to detect the current state. The current on the three-phase copper bar 502 generates a magnetic field, and the notch 504 focuses the magnetic field to make the current sensor more accurately detect the magnetic field, and then inversely deduce the current state based on the proportional relationship between the magnetic field and the current. Further, the detection part includes two notches 504 symmetrically arranged along the center line of the width direction of the three-phase copper bar 502, and the notch 504 does not exceed the center line to avoid the three-phase copper bar 502 being cut off and ensure the structural reliability. The two notches 504 are symmetrically arranged to ensure uniform magnetic field distribution and stable linear relationship with the current, reduce detection error and three-phase interference. The current sensor chip arranged on the drive control board 6 is used to monitor and control the current size, thereby controlling the operation of the motor.

[0086] The upper side of the shell 1 is provided with a second fixing column 106, and the terminal block 5 is arranged on the shell 1 through the second fixing column 106. In an embodiment, the mounting shell 501 is provided with three groups of three-phase copper bars 502 at intervals, and mounting holes 506 are arranged between adjacent two three-phase copper bars 502, and two mounting holes 506 are arranged. The screw passes through the mounting hole 506 and is threadedly connected with the threaded hole arranged on the second fixing column 106, and the second fixing column 106 is used to support and fix the terminal block 5.

[0087] As shown in Figure 1 , Figure 2 and Figure 12 , the drive control board 6 covers the power module 4 and the terminal block 5 at the same time. The upper side of the shell 1 and located on both sides of the power module 4 is provided with a first fixing column 105 and a second fixing column 106, and the drive control board 6 is arranged on the shell 1 through the first fixing column 105. On the one hand, the screw passes through the hole on the drive control board 6 and is threadedly connected with the threaded hole on the first fixing column 105, so as to support and fix the drive control board 6 on the first fixing column 105. On the other hand, the screw passes through the mounting hole 506 on the mounting shell 501 and the hole on the drive control board 6 and is threadedly connected with the threaded hole on the second fixing column 106, that is, the mounting shell 501 and the drive control board 6 are connected through the same fastener 8, and the drive control board 6 and the mounting shell 501 are also fixed on the shell 1.

[0088] In some embodiments, the drive board 6 is pin-welded to the power module 4. Two DC copper bars 206 of the filter 2 are respectively laser-welded to the positive pin 3021 of the positive copper bar 302 and the negative pin 3031 of the negative copper bar 303 of the capacitor 3. Three groups of electrodes 320 on the base 304 of the capacitor 3 are respectively laser-welded to three groups of input copper bars of the power module 4. The output copper bars of the power module 4 and the three-phase copper bars 502 of the terminal block 5 are connected by laser welding. Compared with the traditional bolt connection between copper bars, the number of bolts and the increase of contact resistance caused by installation are reduced, and the contact resistance between the conductive copper bars is increased. The present scheme reduces the contact resistance between the copper bars, thereby reducing the heat generation of the copper bars, improving the current carrying capacity, and improving the conductivity.

[0089] The copper bars are connected by laser welding process, reducing the heat generation. The capacitor core 301, the nanocrystalline magnetic ring 202 and the ferrite magnetic core 204 are high-heat devices and are sensitive to temperature. High temperature can affect the performance and service life of the product. Efficient heat dissipation can improve the performance of the capacitor core 301, the nanocrystalline magnetic ring 202 and the ferrite magnetic core 204 and increase the service life. By simultaneously potting the capacitor core 301, the negative copper bar 303 and the positive copper bar 302 of the capacitor 3, the DC copper bar 206 of the filter 2, the first capacitor board 201, the nanocrystalline magnetic ring 202, the third capacitor board 203, the ferrite magnetic core 204 and the fifth capacitor board 205 in the lower cavity 120 of the shell 1M with a cooling channel 1, each device can be fully cooled, solving the problem of high heat generation of the controller and greatly increasing the service life and safety performance of the whole machine.

[0090] The embodiment provides an electric machine control system.

[0091] The embodiment provides a vehicle including the electric machine control system. Obviously, the above-described embodiments of the present application are merely examples for clarity and are not intended to limit the implementation of the present application. For those skilled in the art, other different forms of changes or modifications can be made on the basis of the above description. Here, all the embodiments are not required to be exhausted. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An inverter, characterized in that, The device includes a housing (1) and a filter (2), a capacitor (3), a power module (4), a terminal block (5) and a drive control board (6) disposed on the housing (1). The filter (2), the capacitor (3), the power module (4) and the terminal block (5) are electrically connected in sequence, and the drive control board (6) is electrically connected to the power module (4). The filter (2) includes multiple devices; The housing (1) has a cavity (120), and the filter (2) is disposed in the cavity (120). The cavity (120) is filled with potting compound to fix the filter (2). The bottom of the cavity (120) is provided with a heat dissipation part (121). The shape of the heat dissipation part (121) is adapted to the shape of the plurality of devices. The heat dissipation part (121) is used to dissipate heat from the devices.

2. The inverter according to claim 1, characterized in that, The plurality of said devices are arranged along a first direction, and the heat dissipation part (121) includes a plurality of heat dissipation platforms, the shapes of the plurality of heat dissipation platforms being adapted to the shapes of the plurality of said devices one by one.

3. The inverter according to claim 1, characterized in that, The filter (2) includes a DC copper busbar (206), and a plurality of the devices are arranged along the extension direction of the DC copper busbar (206).

4. The inverter according to claim 3, characterized in that, The plurality of said devices include: The capacitor board includes a circuit board (2031) and a capacitor (2032) disposed on the circuit board (2031). The circuit board (2031) and the DC copper busbar (206) are electrically connected. The shape of the heat dissipation part (121) is adapted to the shape of the capacitor (2032). The magnetic core structure has a DC copper busbar (206) inserted through it, and the shape of the heat dissipation part (121) is adapted to the shape of the magnetic core structure.

5. The inverter according to claim 4, characterized in that, The capacitor plate and the power-taking pin (209) of the DC copper busbar (206) are welded together to achieve electrical connection.

6. The inverter according to claim 4, characterized in that, The capacitor plate has capacitors (2032) on both sides of the DC copper busbar (206) along the second direction. The shape of the heat dissipation part (121) along the second direction is adapted to the shape of the capacitor (2032) on one side, the shape of the DC copper busbar (206) and the shape of the capacitor (2032) on the other side.

7. The inverter according to claim 1, characterized in that, The filter (2) and the capacitor (3) are connected by a copper busbar through laser welding; and / or, the capacitor (3) and the power module (4) are connected by a copper busbar through laser welding; and / or, the power module (4) and the terminal block (5) are connected by a copper busbar through laser welding; and / or, the drive control board (6) is welded to the PIN pins of the power module (4).

8. The inverter according to claim 1, characterized in that, The drive control board (6) is used to detect the current status of the three-phase copper busbar (502) on the terminal block (5).

9. The inverter according to claim 1, characterized in that, The terminal block (5) includes a mounting shell (501), a three-phase copper busbar (502), and an insulating film (503). The three-phase copper busbar (502) is provided with a detection part. The three-phase copper busbar (502) is located on the mounting shell (501), and the detection part is exposed on the mounting shell (501). The insulating film (503) covers the detection part to isolate the drive control board (6). The detection part is used to cooperate with the drive control board (6) to detect the current status.

10. The inverter according to claim 9, characterized in that, The detection part is a notch (504) that is recessed from the edge to the inside along the width direction of the three-phase copper busbar (502). The detection part is used to cooperate with the current sensor on the drive control board (6) to detect the current status.

11. The inverter according to claim 10, characterized in that, The detection unit includes two notches (504) symmetrically arranged along the centerline of the three-phase copper busbar (502) in the width direction, and the notches (504) do not exceed the centerline.

12. The inverter according to claim 9, characterized in that, The mounting housing (501) is connected to the drive control board (6) by fasteners (8).

13. The inverter according to claim 1, characterized in that, The potting compound is a thermally conductive adhesive, which is filled between the heat dissipation part (121) and the device; or, it also includes a thermally conductive pad, which is disposed between the heat dissipation part (121) and the device.

14. An inverter, characterized in that, The device includes a housing (1) and a filter (2), a capacitor (3), a power module (4), a terminal block (5) and a drive control board (6) disposed on the housing (1). The filter (2), the capacitor (3), the power module (4) and the terminal block (5) are electrically connected in sequence, and the drive control board (6) is electrically connected to the power module (4). The terminal block (5) includes a mounting shell (501), a three-phase copper busbar (502), and an insulating film (503). The three-phase copper busbar (502) is provided with a detection part. The three-phase copper busbar (502) is located on the mounting shell (501), and the detection part is exposed on the mounting shell (501). The insulating film (503) covers the detection part to isolate the drive control board (6). The detection part is used to cooperate with the drive control board (6) to detect the current status on the three-phase copper busbar (502).

15. A motor control system, characterized in that, Including the inverter as described in any one of claims 1-14.

16. A vehicle, characterized in that, Including the motor control system as described in claim 15.

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