CN211151796U - Silicon carbide motor controller for electric automobile - Google Patents
Silicon carbide motor controller for electric automobile Download PDFInfo
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- CN211151796U CN211151796U CN201922240402.XU CN201922240402U CN211151796U CN 211151796 U CN211151796 U CN 211151796U CN 201922240402 U CN201922240402 U CN 201922240402U CN 211151796 U CN211151796 U CN 211151796U
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- motor controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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Abstract
The utility model relates to a carborundum motor controller for electric automobile, including last case lid, box and lower case lid that set gradually from top to bottom, be equipped with the controller subassembly in the box, the controller subassembly includes mounting panel and sets up the PCBA board in the mounting panel bottom, is equipped with the adjacent thin-film electric capacity in position and radiator subassembly on the mounting panel, the radiator subassembly includes a plurality of radiators of range upon range of, be equipped with the power module in the intermediate layer of a plurality of radiators respectively, the power module is carborundum power module; the radiator assembly is provided with a stop block on one side facing the inside of the support plate, a plate spring is arranged between the stop block and the radiator assembly, and the stop block is provided with a three-phase output assembly connected with the output end of the power module. Compared with the prior art, the utility model discloses carborundum power module radiating effect is good, guarantees the stable output capacity of machine controller under the high switching frequency condition, has improved whole motor drive system's power density, has reduced the volume of system simultaneously.
Description
Technical Field
The utility model relates to a machine controller especially relates to a carborundum machine controller for electric automobile.
Background
With the continuous deep development of new energy automobiles, electric automobiles are more and more popularized in daily life of people, a driving motor controller is a core part in the electric automobile, the safe and reliable work of the driving motor controller is the key for the normal work of the whole electric automobile, a power module of the core in the traditional motor controller is usually controlled by a conventional IGBT, but the conventional IGBT has a low temperature-resistant grade chip, an over-temperature fault can be reported when the temperature reaches a certain degree, the motor controller can be damaged under the serious condition, and the improvement of the power density of the motor controller is also severely limited by the temperature-resistant limitation of the IGBT. If the power density of the motor controller needs to be improved, the size of the motor controller can only be increased, but the requirements of the interior of the whole automobile on space arrangement and power density are difficult to meet, and the improvement of the power of the electric automobile is limited. And if can look for a kind of temperature-resistant ability higher IGBT chip, just so can improve motor controller's power density under the condition of not increasing motor controller volume, have very big competitive advantage in the whole car arrangement space like this. Therefore, the silicon carbide motor controller which is high-temperature resistant, high in power density, small in size, good in heat dissipation performance and suitable for batch assembly is urgently needed to be designed so as to meet the development requirements of the domestic new energy automobile industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a carborundum motor controller for electric automobile in order to overcome the defect that the temperature resistance of the power module of the existing motor controller is not high and the output power grade is lower in the prior art.
The purpose of the utility model can be realized through the following technical scheme:
a silicon carbide motor controller for an electric automobile comprises an upper box cover, a box body and a lower box cover which are sequentially arranged from top to bottom, wherein a controller assembly is arranged in the box body and comprises a support plate and a PCBA plate arranged at the bottom of the support plate, a thin film capacitor and a radiator assembly which are adjacent in position are arranged on the support plate, the radiator assembly comprises a plurality of radiators which are arranged in a stacked mode, power modules are respectively arranged in interlayers of the radiators, the power modules are silicon carbide power modules, and the input ends of the power modules are electrically connected with the output ends of the thin film capacitors; the radiator assembly is characterized in that a stop block is arranged on one side of the radiator assembly facing the inside of the support plate, a plate spring is arranged between the stop block and the radiator assembly, and a three-phase output assembly connected with the output end of the power module is arranged on the stop block.
Preferably, the three-phase output assembly comprises a three-phase support fixed on the stop block and a three-phase output polar plate fixed on the three-phase support, and one end of the three-phase output polar plate is electrically connected with the output end of the power module.
Preferably, the three-phase power module further comprises a current sensor fixed on the stop block, and one end of the three-phase output pole plate, which is not connected with the power module, penetrates through the current sensor and is electrically connected with the three-phase plug-in unit.
Preferably, one side of the thin film capacitor is provided with a magnetic ring assembly fixed on the support plate, and the input end of the thin film capacitor penetrates through the magnetic ring assembly to be electrically connected with the bus plug-in.
Preferably, the outer side of the box body is provided with a three-phase plug-in, an interface board and a bus plug-in, the three-phase plug-in is connected with one end of the three-phase output polar plate which is not connected with the power module, one side of the interface board is connected with the PCBA board, and the other side of the interface board is connected with a communication wiring harness of the whole vehicle.
Preferably, a square hole for installing the radiator assembly is formed in the support plate, the stop block is arranged on one side, facing the inside of the support plate, of the square hole, and a limit block is arranged on the other side, opposite to the stop block, of the square hole.
Preferably, the plate spring is of a wave-shaped bent structure.
Preferably, the output end of the thin-film capacitor comprises a plurality of output electrode plate assemblies arranged side by side on one side of the thin-film capacitor facing the power module, the input end of the power module comprises input electrode plates, and each output electrode plate assembly is correspondingly connected with an input electrode plate of one power module.
Compared with the prior art, the utility model has the advantages of it is following:
1. through choosing for use the volume littleer, the higher carborundum power module of temperature resistant grade, step up power module in the centre through range upon range of formula radiator subassembly, carborundum power module can dispel the heat simultaneously in both sides, take away the heat that power module produced fast, can play fine radiating effect, guarantee the stable output capacity of machine controller under the high switching frequency condition, power module itself can export higher switching frequency like this, make machine controller export higher power, then improved whole motor drive system's power density, the volume of system has been reduced simultaneously.
2. The controller component integrates a support plate, a thin film capacitor, a radiator component, a power module, a PCBA plate, a magnetic ring component, a stop block, a plate spring, a current sensor, a three-phase support and a three-phase output polar plate, a highly integrated modular structure can be formed, so that the controller component is convenient to assemble and suitable for automatic production, and the integration degree of the whole motor controller can be improved.
Drawings
Fig. 1 is an exploded view of the motor controller of the present invention;
fig. 2 is a schematic structural diagram of a controller assembly of the motor controller of the present invention;
fig. 3 is a schematic structural diagram of a box body of the motor controller of the present invention;
fig. 4 is a schematic structural view of a support plate of the motor controller of the present invention;
fig. 5 is a schematic structural view of an upper case cover of the motor controller of the present invention;
fig. 6 is a schematic view of a lower case cover of the motor controller of the present invention;
fig. 7 is a schematic structural diagram of a plate spring of the motor controller of the present invention.
Wherein: the device comprises a box body 1, an upper box cover 2, a lower box cover 3, a controller component 4, a bus plug-in 5, a three-phase plug-in 6, an interface board 7, a support plate 4-1, a magnetic ring component 4-2, a stop block 4-3, a plate spring 4-4, a thin film capacitor 4-5, a radiator component 4-6, a power module 4-7, a current sensor 4-8, a three-phase support 4-9, a three-phase output polar plate 4-10 and a PCBA plate 4-11.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The 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.
Examples
As shown in fig. 1, the present application provides a silicon carbide motor controller for an electric vehicle, which includes an upper case cover 2, a case body 1, and a lower case cover 3, which are sequentially arranged from top to bottom. The box body 1 is internally provided with a controller assembly 4, and the controller assembly 4 is fixed in the middle of the box body 1.
As shown in FIG. 2, the controller assembly 4 comprises a support plate 4-1 and a PCBA plate 4-11 arranged at the bottom of the support plate 4-1, and the thin film capacitor 4-5 and the heat sink assembly 4-6 are adjacently arranged on the support plate 4-1. The radiator assembly 4-6 comprises a plurality of radiators which are arranged in a stacked mode, power modules 4-7 are arranged in interlayers of the radiators respectively, the power modules 4-7 are silicon carbide power modules 4-7, and input ends of the power modules 4-7 are electrically connected with output ends of the thin film capacitors 4-5. A stop block 4-3 is arranged on one side of the radiator module 4-6 facing the inside of the support plate 4-1, and a plate spring 4-4 is arranged between the stop block 4-3 and the radiator module 4-6. The PCBA board 4-11 is fixed on the fixing column on the back of the bracket board 4-1 and is electrically connected with the signal output terminal of the power module 4-7, and the signal output terminal of the power module penetrates through the conductive hole on the PCBA and is welded together in a soldering mode.
The output end of the thin-film capacitor 4-5 comprises a plurality of output pole plate assemblies which are arranged on one side of the thin-film capacitor 4-5 facing the power module 4-7 side by side, the input end of the power module 4-7 comprises an input pole plate, and each output pole plate assembly is correspondingly connected with one input pole plate of the power module 4-7.
The power module 4-7 adopted by the motor controller is a silicon carbide power module 4-7, the switching frequency is very high, the output end of the film capacitor 4-5 is far away from the input end of the silicon carbide power module 4-7, when the switching frequency is high, the input end inductance is too large, large loss can be generated, and the temperature rise of the power module 4-7 is further influenced, in order to control the temperature rise of the silicon carbide power module 4-7, the silicon carbide power module 4-7 is placed in the middle of an interlayer of a radiator assembly 4-6, the silicon carbide power module 4-7 can radiate heat at two sides simultaneously, heat generated by the power module 4-7 is taken away quickly, and the stable output capacity of the motor controller under the condition of high switching frequency is ensured.
The stop block 4-3 is provided with a three-phase output assembly connected with the output end of the power module 4-7. The three-phase output assembly comprises a three-phase support 4-9 fixed on the stop block 4-3 and a three-phase output polar plate 4-10 fixed on the three-phase support 4-9, one end of the three-phase output polar plate 4-10 is electrically connected with the output end of the power module 4-7, and the other end of the three-phase output polar plate is electrically connected with the three-phase plug-in 6. A current sensor 4-8 is fixed on the stop block 4-3, and one end of the three-phase output polar plate 4-10, which is not connected with the power module 4-7, passes through the current sensor 4-8 and is electrically connected with the three-phase plug-in 6.
One side of the thin film capacitor 4-5 is provided with a magnetic ring component 4-2 fixed on the support plate 4-1, and the input end of the thin film capacitor 4-5 passes through the magnetic ring component 4-2 to be electrically connected with the bus plug-in 5.
As shown in fig. 3, the casing 1 is a housing with an upper opening and a lower opening, and a three-phase plug-in unit 6, an interface board 7 and a bus bar plug-in unit 5 are arranged outside the casing 1. The three-phase plug-in 6 is connected with one end of the three-phase output polar plate 4-10 which is not connected with the power module; the bus plug-in 5 corresponds to the position of the thin film capacitor 4-5; the inner side of the interface board 7 facing the box body 1 is connected with PCBA boards 4-11, and the outer side of the interface board is connected with a communication wiring harness of the whole vehicle through a plug, so that communication with the whole vehicle is realized.
As shown in FIG. 4, a square hole for installing the radiator module 4-6 is arranged in the support plate 4-1, the stop block 4-3 is arranged at one side of the square hole facing the inside of the support plate 4-1, a waist-shaped column is respectively arranged at two sides of the square hole, and a limit block is arranged at one side of the square hole opposite to the stop block 4-3.
As shown in figure 5, the plate spring 4-4 is in a wave-shaped bent structure, the heat sink assembly 4-6 is pressed between the stop block 4-3 and the limiting block by the pressing force of the plate spring 4-4, so that the power module 4-7 is clamped in the interlayer of the heat sink assembly 4-6.
In this embodiment, since there is a high voltage electrical device above the motor controller, in order to ensure that the upper case cover does not contact with the high voltage electrical device to cause a short circuit, a protrusion is locally formed, as shown in fig. 6, a plurality of rectangular protrusions with different shapes are provided on the upper case cover 2, so as to ensure an electrical safety distance between the case cover and the high voltage electrical device. Because the lower portion of the motor controller is provided with a plug with a higher height, three inward circular protrusions corresponding to the three plug positions are arranged on the lower box cover 3 and used for avoiding, and the interference between the plug and the lower box cover can be avoided, as shown in fig. 7.
The assembly process of the motor controller is as follows:
(1) the installation of the controller assembly 4 is completed first: the power module 4-7 is arranged in an inner interlayer of the radiator component 4-6, then the radiator component 4-6 provided with the power module 4-7 is assembled on the support plate 4-1, the stop block 4-3 is arranged on the support plate 4-1, and the plate spring 4-4 is arranged between the radiator component 4-6 and the stop block 4-3 to be compressed; fixing the thin film capacitor 4-5 on a support, enabling the output end of the thin film capacitor 4-5 to be tightly attached to the input end of the power module 4-7, electrically connecting the thin film capacitor with the input end of the power module through laser welding, and then sleeving the magnetic ring assembly 4-2 on the input end pole plate of the thin film capacitor 4-5 and fixing the magnetic ring assembly on a support plate 4-1; fixing a three-phase support 4-9 on a stop block 4-3, then fixing a current sensor 4-8 on the stop block 4-3, tightly attaching one end of a three-phase output polar plate 4-10 to the output end of a power module 4-7 and fixing the three-phase output polar plate by laser welding, and enabling the other end of the three-phase output polar plate 4-10 to penetrate through the current sensor 4-8 and be fixed on the three-phase support 4-9; then fixing the PCBA board 4-11 on a support column on the back of the support plate 4-1, and electrically connecting the PCBA board with a signal output terminal of the power module 4-7, so as to complete the assembly of the controller component 4;
(2) fixing the whole controller assembly 4 in the box body 1, assembling the three-phase plug-in 6 on the side wall of the box body 1, electrically connecting the terminal part of the three-phase plug-in 6 with the output end of the three-phase output polar plate 4-10, fixing the bus plug-in 5 on the side wall of the box body 1, electrically connecting the terminal part of the bus plug-in 5 with the input end polar plate of the thin-film capacitor 4-5, fixing the interface board 7 on the side wall of the box body 1, and electrically connecting the interface board 7 and the PCBA board 4-11 through a wire harness;
(3) and then fixing the upper box cover 2 at the top of the box body 1, and fixing the lower box cover 3 at the bottom of the box body 1, thus finishing the assembly of the whole silicon carbide motor controller.
Claims (8)
1. A silicon carbide motor controller for an electric automobile comprises an upper box cover, a box body and a lower box cover which are sequentially arranged from top to bottom, wherein a controller assembly is arranged in the box body; the radiator assembly is characterized in that a stop block is arranged on one side of the radiator assembly facing the inside of the support plate, a plate spring is arranged between the stop block and the radiator assembly, and a three-phase output assembly connected with the output end of the power module is arranged on the stop block.
2. The silicon carbide motor controller of claim 1, wherein the three-phase output assembly comprises a three-phase support fixed on the stop block, and further comprises a three-phase output pole plate fixed on the three-phase support, and one end of the three-phase output pole plate is electrically connected with the output end of the power module.
3. The silicon carbide motor controller for the electric vehicle as claimed in claim 2, further comprising a current sensor fixed on the stopper, wherein the end of the three-phase output plate which is not connected with the power module passes through the current sensor and is electrically connected with the three-phase plug-in unit.
4. The silicon carbide motor controller for the electric automobile as claimed in claim 3, wherein a magnetic ring assembly fixed on the support plate is arranged on one side of the thin film capacitor, and the input end of the thin film capacitor penetrates through the magnetic ring assembly to be electrically connected with the bus bar insert.
5. The silicon carbide motor controller for the electric automobile according to claim 4, wherein a three-phase plug-in, an interface board and a bus plug-in are arranged on the outer side of the box body, the three-phase plug-in is connected with one end of the three-phase output polar plate which is not connected with the power module, one side of the interface board is connected with the PCBA, and the other side of the interface board is connected with a whole automobile communication wire harness.
6. The silicon carbide motor controller for the electric vehicle as claimed in claim 1, wherein a square hole for installing the heat sink assembly is formed in the support plate, the stopper is disposed at one side of the square hole facing the inside of the support plate, and a limit block is disposed at the other side of the square hole opposite to the stopper.
7. The silicon carbide motor controller for electric vehicles according to claim 1, wherein the plate spring has a wave-shaped bent structure.
8. The silicon carbide motor controller of claim 1, wherein the output end of the thin film capacitor comprises a plurality of output electrode plate assemblies arranged side by side on a side of the thin film capacitor facing the power modules, the input end of the power modules comprises input electrode plates, and each output electrode plate assembly is correspondingly connected with an input electrode plate of one power module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922240402.XU CN211151796U (en) | 2019-12-14 | 2019-12-14 | Silicon carbide motor controller for electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922240402.XU CN211151796U (en) | 2019-12-14 | 2019-12-14 | Silicon carbide motor controller for electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN211151796U true CN211151796U (en) | 2020-07-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201922240402.XU Active CN211151796U (en) | 2019-12-14 | 2019-12-14 | Silicon carbide motor controller for electric automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291159A (en) * | 2021-06-02 | 2021-08-24 | 江苏云意电气股份有限公司 | A supporting structure for 48V's BSG motor inverter |
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2019
- 2019-12-14 CN CN201922240402.XU patent/CN211151796U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113291159A (en) * | 2021-06-02 | 2021-08-24 | 江苏云意电气股份有限公司 | A supporting structure for 48V's BSG motor inverter |
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