Three-phase copper bar and electric drive assembly
阅读说明:本技术 一种三相铜排和电驱动总成 (Three-phase copper bar and electric drive assembly ) 是由 王之恒 薛辉 胡建军 王弦弦 郜业猛 许长春 于 2019-10-08 设计创作,主要内容包括:本发明提供了一种三相铜排和电驱动总成,所述三相铜排包括底座以及安装于底座上的三个铜排和至少一传热片,传热片位于底座和铜排之间,底座上设有用于供传热片的至少一部分穿出的通孔。所述电驱动总成包括电机和控制器,控制器的三相高压电源输出端与电机的三相端子通过上述的三相铜排电连接。本发明通过传热片可以将铜排上产生的热流导出,从而能够有效降低铜排的温度,提高铜排的散热效果,由此可以解决电机和控制器之间的热场耦合的问题。(The invention provides a three-phase copper bar and an electric drive assembly, wherein the three-phase copper bar comprises a base, three copper bars and at least one heat transfer piece, the three copper bars and the at least one heat transfer piece are arranged on the base, the heat transfer piece is positioned between the base and the copper bars, and the base is provided with a through hole for at least one part of the heat transfer piece to penetrate through. The electric drive assembly comprises a motor and a controller, and the three-phase high-voltage power supply output end of the controller is electrically connected with the three-phase terminal of the motor through the three-phase copper bar. According to the invention, heat flow generated on the copper bar can be led out through the heat transfer sheet, so that the temperature of the copper bar can be effectively reduced, the heat dissipation effect of the copper bar is improved, and the problem of thermal field coupling between the motor and the controller can be solved.)
1. The utility model provides a three-phase copper bar, its characterized in that, include the base and install in three copper bar and at least one heat transfer piece on the base, the heat transfer piece is located the base with between the copper bar, be equipped with on the base and be used for supplying the through-hole that at least a part of heat transfer piece wore out.
2. The three-phase copper bar of claim 1, wherein the heat transfer sheet comprises a first sheet layer and a second sheet layer stacked on each other, the first sheet layer is in contact with the copper bar, at least a portion of the second sheet layer is in contact with the base, and the thermal conductivity of the first sheet layer is greater than that of the second sheet layer.
3. The three-phase copper bar as claimed in claim 1, wherein a plurality of thermal insulation walls are disposed on the base, the thermal insulation walls divide the base into three thermal insulation cavities separated from each other, the number of the heat transfer sheets is three, a copper bar and a heat transfer sheet are disposed in each thermal insulation cavity, and a through hole for allowing at least a portion of the heat transfer sheet to pass through is disposed at the bottom of each thermal insulation cavity.
4. The three-phase copper bar as claimed in claim 3, wherein a mounting groove is formed at a bottom of each heat insulation cavity for mounting the heat transfer plate, and the through hole is formed at a bottom of the mounting groove.
5. The three-phase copper bar as claimed in claim 3, wherein fixing posts are provided at both ends of the mounting groove, and a slot is provided on the copper bar to match with the fixing posts.
6. The three-phase copper bar as claimed in claim 1, wherein one end of the base is provided with a current contact pad, and an end of the current contact pad, which is far away from the base, is turned upwards at an angle.
7. The three-phase copper bar of claim 1, wherein a gap exists between at least a portion of the copper bar and the base.
8. The three-phase copper bar as claimed in claim 7, wherein at least a portion of the base is disposed to protrude away from the copper bar.
9. The three-phase copper bar as claimed in claim 1, wherein first mounting holes are formed at both ends of the copper bar, second mounting holes corresponding to the first mounting holes are formed at both ends of the base, and the base is connected to the copper bar through fasteners.
10. An electric drive assembly comprising an electric motor and a controller, wherein a three-phase high-voltage power supply output of the controller is electrically connected with a three-phase terminal of the electric motor through a three-phase copper bar according to any one of claims 1 to 13.
11. The electric drive assembly of claim 10 wherein the housing of the electric machine has a cooling water channel, and wherein the portion of the heat transfer sheet that extends through the through hole is adapted to contact the housing of the electric machine.
12. The electric drive assembly of claim 11 wherein the housing of the electric machine is provided with bosses for contacting the heat transfer fins.
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a three-phase copper bar and electric drive assembly.
Background
The rapid development of new energy automobiles puts high requirements on the high power output of electric drive assembly products. The high power output of the electric drive assembly places high demands on the power output of the motor and the current capability of the controller, which results in greater heating of the motor and controller. And the high-power electric drive assembly is limited by the tolerance temperature of each component in the motor and the controller, and the temperature on a high-voltage connecting piece for connecting the motor and the controller needs to be considered besides the improvement of heat dissipation of the motor and the controller. If the heat dissipation capacity of the high-voltage connector is insufficient, the coupling of the thermal fields of the motor and the controller is likely to occur, so that the internal over-temperature failure of the controller or the output capacity of the controller is reduced. Optimizing the form and heat dissipation design of the high voltage connection is therefore important for highly integrated electric drive assembly products.
The three-phase high-voltage connector is usually connected by cables or copper bars. The cable is selected as the high-voltage connecting piece, and the cable has the defects that the thick cable generally has requirements on bending radius, and the installation requirement of compact structure design is difficult to meet; in addition, the cable itself can not increase extra heat dissipation route, if the cable itself can not satisfy the heat dissipation demand, only choose the cable that the diameter is bigger, length is longer, can lead to the rising of cost. The other main connection mode is that copper bars are used for connection, the copper bars have the characteristics of small resistance value, strong current bearing capacity, relatively small heat productivity and convenience in heat dissipation design, and the copper bars are mainly used for large-current conduction. However, since copper is a good conductor of heat, the copper bar connection also risks connecting the heat transfer path between the motor and the controller. Therefore, in the design of the integrated electric drive assembly, the heat dissipation of the copper bar is guaranteed, and the heat dissipation device has very important significance for fully playing the performance of the electric drive assembly.
Disclosure of Invention
The invention aims to provide a three-phase copper bar and electric drive assembly, which can improve the heat dissipation effect of the copper bar and solve the problem of thermal field coupling between a motor and a controller.
In order to achieve the purpose, the invention provides a three-phase copper bar, which comprises a base, three copper bars and at least one heat transfer piece, wherein the three copper bars and the at least one heat transfer piece are arranged on the base, the heat transfer piece is positioned between the base and the copper bars, and the base is provided with a through hole for at least one part of the heat transfer piece to penetrate out.
Optionally, the heat transfer sheet includes a first sheet layer and a second sheet layer that are overlapped with each other, the first sheet layer contacts with the copper bar, at least a portion of the second sheet layer contacts with the base, and a thermal conductivity of the first sheet layer is greater than a thermal conductivity of the second sheet layer.
Optionally, a plurality of heat insulation walls are arranged on the base, the base is divided into three heat insulation cavities which are separated from each other by the plurality of heat insulation walls, the number of the heat transfer pieces is three, one copper bar and one heat transfer piece are placed in each heat insulation cavity, and a through hole for allowing at least part of the heat transfer piece to penetrate out is formed in the bottom of each heat insulation cavity.
Optionally, the bottom of each heat insulation cavity is provided with an installation groove for installing the heat transfer sheet, and the through hole is formed in the bottom of the installation groove.
Optionally, both ends of the mounting groove are provided with fixing columns, and the copper bar is provided with clamping grooves matched with the fixing columns.
Optionally, one end of the base is provided with a current contact gasket, and one end of the current contact gasket, which is far away from the base, is turned upwards by a certain angle.
Optionally, a gap exists between at least a portion of the copper bar and the base.
Optionally, at least a portion of the base is disposed to protrude in a direction away from the position of the copper bar.
Optionally, both ends of the copper bar are provided with first mounting holes, both ends of the base are provided with second mounting holes corresponding to the first mounting holes, and the base is connected with the copper bar through fasteners.
In order to achieve the above object, the present invention further provides an electric drive assembly, which includes a motor and a controller, wherein the three-phase high-voltage power output end of the controller is electrically connected to the three-phase terminal of the motor through the above three-phase copper bar.
Optionally, a cooling water channel is arranged on the casing of the motor, and the part of the heat transfer sheet penetrating out of the through hole can be in contact with the casing of the motor.
Optionally, a boss for contacting the heat transfer sheet is disposed on the housing of the motor.
Compared with the prior art, the three-phase copper bar and electric drive assembly provided by the invention have the following advantages:
(1) the invention provides a three-phase copper bar, which comprises a base, three copper bars and at least one heat transfer piece, wherein the three copper bars and the at least one heat transfer piece are arranged on the base, the heat transfer piece is positioned between the base and the copper bars, and the base is provided with a through hole for at least one part of the heat transfer piece to penetrate through. According to the invention, at least one heat transfer piece is arranged between the base and the three copper bars, and at least one part of the heat transfer piece can penetrate out of the base, so that heat flow generated on the copper bars can be led out through the heat transfer piece, the temperature of the copper bars can be effectively reduced, and the heat dissipation effect of the copper bars is improved. The three-phase copper bar provided by the invention can be used as a three-phase high-voltage connecting piece between a motor and a controller, the part of the heat transfer sheet penetrating out of the through hole can be contacted with the shell of the motor, and the shell of the motor is provided with the cooling water channel, so that part of heat generated on the copper bar can be guided into the shell of the motor through the heat transfer sheet, and the temperature of the copper bar can be further reduced, because the heat capacity of the shell of the motor is much larger than that of the copper bar, and the shell of the motor is also provided with the cooling water channel, the additionally guided heat flow hardly influences the thermal field of the shell of the motor, therefore, the three-phase copper bar provided by the invention can well enhance the heat dissipation effect of the copper bar, reduce the temperature of the copper bar, weaken the coupling relation between the motor and the thermal field of the controller, and solve the problem of thermal field coupling between, thereby ensuring that the respective performance is not limited by temperature.
(2) The electric drive assembly provided by the invention comprises a motor and a controller, wherein the three-phase high-voltage power supply output end of the controller is electrically connected with the three-phase terminal of the motor through the three-phase copper bar. Because the three-phase copper bar is provided with at least one heat transfer sheet between the base and the three copper bars, at least one part of the heat transfer sheet can penetrate out of the base, so that heat flow generated on the copper bar can be led out through the heat transfer sheet, therefore, the temperature of the copper bar can be effectively reduced, the heat dissipation effect of the copper bar is improved, the three-phase high-voltage power supply output end of the controller in the electric drive assembly provided by the invention is electrically connected with the three-phase terminal of the motor through the three-phase copper bar, so that the thermal field coupling relation between the motor and the controller is weakened, and then can guarantee that the performance of motor and controller can not receive the restriction of temperature respectively, guarantee the output performance of motor and controller under the thermal stability to can guarantee the demand of electric drive assembly high-power output, can guarantee the security that the complete machine used again.
Drawings
Fig. 1 is a schematic overall structure diagram of a three-phase copper bar according to an embodiment of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a cross-sectional view taken along the line A-A in FIG. 3;
fig. 5 is a schematic partial structure view of a three-phase copper bar according to an embodiment of the present invention;
fig. 6 is a partially exploded view of an electric drive assembly according to an embodiment of the present invention.
Wherein the reference numbers are as follows:
a base-100; copper bar-200; a heat transfer sheet-300; a through-hole-110; a first ply-310; a second ply-320; -120 insulating walls; a thermally insulating chamber-130; mounting groove-140; fixing posts-150; a card slot-210; gap-330; current contact pad-160; a first mounting hole-220; a second mounting hole-170; fastener-400; three-phase line-500; a housing-600; a boss-610; a gap of-700; and a third mounting hole-161.
Detailed Description
The three-phase copper bar and the electric driving assembly provided by the invention are further described in detail with reference to the accompanying drawings 1 to 6 and the specific embodiment. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are all used in a non-precise scale for the purpose of facilitating and distinctly aiding in the description of the embodiments of the present invention.
To make the objects, features and advantages of the present invention comprehensible, reference is made to the accompanying drawings. It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not to be construed as limiting the scope of the present disclosure, so they are not essential to the technology, and any structural modifications, ratio changes, or size adjustments may be made without affecting the function and the achievable purpose of the present disclosure.
As described in the background art, since the high-power motor and the controller connected by the copper bar generate a large amount of heat, and the copper bar is a good heat conductor, the thermal fields of the motor and the controller are coupled to each other, and may affect the performance of the controller. In addition, the heating of the copper bar and the heating of the contact resistor at the bolt joint are considered, the coupling condition of the thermal field on the copper bar is very complex, and therefore the output performance of the motor and the controller under the thermal steady state can be guaranteed only by leading out extra heat on the copper bar.
The traditional heat dissipation means includes water cooling, air cooling, heat exchange area increasing and other means, but the position space where the copper bar is located is very limited, and the area size of the copper bar is difficult to modify, so that the means are difficult to implement.
The core idea of the invention is to provide a three-phase copper bar and electric drive assembly, which can improve the heat dissipation effect of the copper bar and solve the problem of thermal field coupling between a motor and a controller.
To achieve the above object, referring to fig. 1 to 3, fig. 1 schematically illustrates an overall structure of a three-phase copper bar according to an embodiment of the present invention, fig. 2 is an exploded structure diagram of fig. 1, and fig. 3 is a top view of fig. 1. As shown in fig. 1 to 3, the three-phase copper bar includes a
In the present invention, one of the three
Preferably, both ends of the
Preferably, referring to fig. 4, fig. 4 schematically shows a cross-sectional view of the plane a-a in fig. 3, and as shown in fig. 4, a
Preferably, as shown in fig. 4, at least a portion of the
Preferably, referring to fig. 1 to 5, wherein fig. 5 schematically shows a partial structure of a three-phase copper bar according to an embodiment of the present invention, as shown in fig. 1 to 5, one end of the
Preferably, the
Preferably, as shown in fig. 5, an end of the
In the invention, the number of the
The
Preferably, the
Preferably, the insulating ability of the
Preferably, the
Preferably, a plurality of
Preferably, the
Preferably, as shown in fig. 3, a mounting groove 140 for mounting the
Preferably, as shown in fig. 3, fixing
Preferably, as shown in fig. 3, two ends of the mounting groove 140 are provided with a fixing
Preferably, as shown in fig. 3, a locking
Preferably, as shown in fig. 3, one end of the
In order to achieve the above object, the present invention further provides an electric drive assembly, which includes a motor and a controller, wherein a three-phase high-voltage power output end of the controller is electrically connected to a three-phase terminal of the motor through the above three-phase copper bar. Because the three-phase copper bar is provided with the at least one
Preferably, a cooling water channel is formed in the
Preferably, referring to fig. 5, a partial exploded view of an electric drive assembly according to an embodiment of the present invention is schematically shown, and as shown in fig. 5, a
In summary, compared with the prior art, the three-phase copper bar and the electric drive assembly provided by the invention have the following advantages:
(1) the invention provides a three-phase copper bar, which comprises a base, three copper bars and at least one heat transfer piece, wherein the three copper bars and the at least one heat transfer piece are arranged on the base, the heat transfer piece is positioned between the base and the copper bars, and the base is provided with a through hole for at least one part of the heat transfer piece to penetrate through. According to the invention, at least one heat transfer piece is arranged between the base and the three copper bars, and at least one part of the heat transfer piece can penetrate out of the base, so that heat flow generated on the copper bars can be led out through the heat transfer piece, the temperature of the copper bars can be effectively reduced, and the heat dissipation effect of the copper bars is improved. The three-phase copper bar provided by the invention can be used as a three-phase high-voltage connecting piece between a motor and a controller, the part of the heat transfer sheet, which penetrates out of the through hole, can be contacted with the shell of the motor, and because the shell of the motor is provided with the cooling water channel, part of heat generated on the copper bar can be guided into the shell of the motor through the heat transfer sheet, so that the temperature of the copper bar can be further reduced, because the heat capacity of the shell of the motor is much larger than that of the copper bar, and the shell of the motor is also provided with the cooling water channel, the additionally guided heat flow hardly influences the thermal field of the shell of the motor, therefore, the three-phase copper bar provided by the invention can well enhance the heat dissipation effect of the copper bar, reduce the temperature of the copper bar, weaken the coupling relation between the motor and the thermal field of the controller, and solve the problem of thermal field, thereby ensuring that the respective performance is not limited by temperature.
(2) The electric drive assembly provided by the invention comprises a motor and a controller, wherein the three-phase high-voltage power supply output end of the controller is electrically connected with the three-phase terminal of the motor through the three-phase copper bar. Because the three-phase copper bar is provided with at least one heat transfer sheet between the base and the three copper bars, at least one part of the heat transfer sheet can penetrate out of the base, so that heat flow generated on the copper bar can be led out through the heat transfer sheet, therefore, the temperature of the copper bar can be effectively reduced, the heat dissipation effect of the copper bar is improved, the three-phase high-voltage power supply output end of the controller in the electric drive assembly provided by the invention is electrically connected with the three-phase terminal of the motor through the three-phase copper bar, so that the thermal field coupling relation between the motor and the controller is weakened, and then can guarantee that the performance of motor and controller can not receive the restriction of temperature respectively, guarantee the output performance of motor and controller under the thermal stability to can guarantee the demand of electric drive assembly high-power output, can guarantee the security that the complete machine used again.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the indicated orientations and positional relationships based on the drawings for ease of description and simplicity of description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the present invention. In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in interactive relationship with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means 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 with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is at a lesser elevation than the second feature.
Moreover, it is noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only for the purpose of describing the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications and variations of the present invention will be made by those skilled in the art in light of the above disclosure and fall within the scope of the appended claims. It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
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