CN110707449A - Three-phase copper bar and electric drive assembly - Google Patents
Three-phase copper bar and electric drive assembly Download PDFInfo
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- CN110707449A CN110707449A CN201910950653.9A CN201910950653A CN110707449A CN 110707449 A CN110707449 A CN 110707449A CN 201910950653 A CN201910950653 A CN 201910950653A CN 110707449 A CN110707449 A CN 110707449A
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- Prior art keywords
- copper bar
- base
- heat transfer
- phase
- motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R9/00—Structural associations of a plurality of mutually-insulated electrical connecting elements, e.g. terminal strips or terminal blocks; Terminals or binding posts mounted upon a base or in a case; Bases therefor
- H01R9/03—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections
- H01R9/031—Connectors arranged to contact a plurality of the conductors of a multiconductor cable, e.g. tapping connections for multiphase cables, e.g. with contact members penetrating insulation of a plurality of conductors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
- H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20436—Inner thermal coupling elements in heat dissipating housings, e.g. protrusions or depressions integrally formed in the housing
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Cooling Or The Like Of Electrical Apparatus (AREA)
Abstract
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.
Description
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 base 100, three copper bars 200 and at least one heat transfer sheet 300, the three copper bars 200 are mounted on the base 100, the heat transfer sheet 300 is located between the base 100 and the copper bars 200, and the base 100 is provided with a through hole 110 for at least a portion of the heat transfer sheet 300 to pass through. The three-phase copper bar provided by the invention comprises a base 100, three copper bars 200 and at least one heat transfer piece 300, wherein the three copper bars 200 and the at least one heat transfer piece 300 are arranged on the base 100, the heat transfer piece 300 is positioned between the base 100 and the copper bars 200, and the base 100 is provided with a through hole 110 for at least one part of the heat transfer piece 300 to penetrate out. According to the invention, at least one heat transfer sheet 300 is arranged between the base 100 and the three copper bars 200, and at least one part of the heat transfer sheet 300 can penetrate out of the base 100, so that heat flow generated on the copper bars 200 can be led out through the heat transfer sheet 300, the temperature of the copper bars 200 can be effectively reduced, and the heat dissipation effect of the copper bars 200 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 300 penetrating out of the through hole 110 can be in contact with the shell 600 of the motor, and because the shell 600 of the motor is provided with the cooling water channel, part of heat generated on the copper bar 200 can be led into the shell 600 of the motor through the heat transfer sheet 300, so that the temperature of the copper bar 200 can be further reduced, because the heat capacity of the shell 600 of the motor is much larger than that of the copper bar 200, and the shell 600 of the motor is also provided with the cooling water channel, additionally led heat flow hardly influences the thermal field of the shell 600 of the motor, therefore, the three-phase copper bar provided by the invention can well enhance the heat dissipation effect of the copper bar 200, reduce the temperature of the copper bar 200, and weaken the coupling relation between the motor and the, the problem of thermal field coupling between the motor and the controller can be solved, and therefore the performance of each can be guaranteed not to be limited by temperature.
In the present invention, one of the three copper bars 200 is used as the U-phase copper bar 200, one is used as the V-phase copper bar 200, and the other is used as the W-phase copper bar 200. The three copper bars 200 are mutually independent and insulated and are arranged on the base 100.
Preferably, both ends of the copper bar 200 are provided with first mounting holes 220, both ends of the base 100 are provided with second mounting holes 170 correspondingly arranged to the first mounting holes 220, and the base 100 is connected to the copper bar 200 through fasteners 400. Because both ends of the copper bar 200 are provided with the first mounting holes 220, and both ends of the base 100 are provided with the second mounting holes 170 correspondingly arranged to the first mounting holes 220, the fastener 400 can be installed in the first mounting holes 220 and the second mounting holes 170 correspondingly arranged, and the copper bar 200 can be fixed on the base 100 through the fastener 400. Preferably, the first mounting hole 220 and the second mounting hole 170 are bolt holes, and the fastener 400 is a bolt, so that the copper bar 200 can be fixed on the base 100 by the bolt cooperating with the first mounting hole 220 and the second mounting hole 170.
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 gap 700 exists between at least a portion of the copper bar 200 and the base 100. Because there is the clearance 700 between at least a part of the copper bar 200 and the base 100, at least a part of the copper bar 200 can suspend on the base, so that the contact area between the copper bar 200 and the base 100 can be reduced significantly. Therefore, by forming the gap 700 between at least one part of the copper bar 200 and the base 100, on one hand, the base 100 and the copper bar 200 are not in complete contact, and further, heat generated on the copper bar 200 is not directly transferred to the base 100, that is, the base 100 is not directly heated by the copper bar 200, so that under a long-time steady-state working condition, the temperature of the base 100 can still be ensured to be close to the ambient temperature and obviously lower than the temperature of the copper bar 200; on the other hand, the arrangement can increase the heat exchange area of natural convection between the copper bar 200 and the air, so that the heat dissipation capacity of the copper bar 200 can be effectively improved. In addition, the arrangement can better ensure the insulation among the three copper bars 200.
Preferably, as shown in fig. 4, at least a portion of the base 100 is protruded away from the position of the copper bar 200. Because, at least a part of base 100 for other parts orientation of base 100 is kept away from the direction protrusion setting of copper bar 200 position, thereby make at least a part of copper bar 200 do not with base 100 contact, promptly at least a part of copper bar 200 with there is the clearance between the base 100, and then make base 100 can directly not by copper bar 200 heats, thereby under long-time steady state operating mode, still can guarantee that the temperature of base 100 is close to and obviously is less than the temperature of copper bar 200 with ambient temperature, and can increase the heat transfer area of natural convection between copper bar 200 and the air, thereby can effectively improve the heat-sinking capability of copper bar 200 self.
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 base 100 is provided with a current contact pad 160, and the current contact pad 160 is mounted on the copper bar 200. Therefore, a current contact gasket 160 is arranged at one end of the base 100, and the current contact gasket 160 is installed on the copper bar 200 and electrically connected with the copper bar 200, so that a three-phase terminal of a motor or a three-phase high-voltage power output end of a controller can be connected with the copper bar 200 through the current contact gasket 160.
Preferably, the current contact pad 160 may be provided with a third mounting hole 161 corresponding to the first mounting hole 220 and the second mounting hole 170. Thus, by providing the third mounting hole 161 on the current contact pad 160, the current contact pad 160 can be fixed on the copper bar 200 by installing the fastener 400 in the correspondingly provided first, second and third mounting holes 220, 170 and 161.
Preferably, as shown in fig. 5, an end of the current contact pad 160 away from the base 100 is bent upward at an angle. Therefore, by turning over the end of the current contact pad 160 away from the base 100 by a certain angle, it is more convenient to connect the three-phase terminal of the motor or the three-phase high-voltage power output end of the controller with the three-phase copper bar provided by the invention. For example, as shown in fig. 1 to 4, the current contact pad 160 is disposed at one end of the base 100 for connecting with a three-phase terminal of a motor, and one end of the current contact pad 160, which is close to the three-phase terminal of the motor, is turned upwards by a certain angle, so that it is more convenient to mount the three-phase line 500 on the base 100, and thus it is more convenient to connect the three-phase copper bar and the three-phase terminal of the motor provided by the present invention.
In the invention, the number of the heat transfer fins 300 may be one, two or more, the number of the heat transfer fins 300 may be specifically set according to specific conditions, and only the copper bars 200 are required to be contacted with the heat transfer fins 300, that is, the heat generated on each copper bar 200 can be led out through the heat transfer fins 300.
The heat transfer sheet 300 is made of a material having a high thermal conductivity and a high insulating ability. For example, the heat transfer sheet 300 has a thermal conductivity of 2.0 to 3.0W/mK, and preferably, the heat transfer sheet 300 has a thermal conductivity of 2.7W/mK. Preferably, the heat transfer sheet 300 is made of a material including a ceramic filler and a silica gel substrate, and since silica gel has good flexibility and insulation capacity, ceramic has strong mechanical properties, thermal conductivity and dielectric limit performance, and the silica gel substrate is filled with the ceramic filler as the material of the heat transfer sheet 300, the heat transfer sheet 300 can have high thermal conductivity and high insulation capacity, and the heat transfer sheet 300 can have good flexibility. Therefore, after the heat transfer sheet 300 is mounted on the base 100, and then the copper bar 200 is mounted on the base 100, since the copper bar 200 generates a certain pressure on the heat transfer sheet 300, the heat transfer sheet 300 can protrude toward the surface away from the copper bar 200, and further at least a portion of the heat transfer sheet 300 can penetrate through the through hole 110 on the base 100, so that the heat transfer sheet 300 can lead out the heat generated on the copper bar 200.
Preferably, the heat transfer sheet 300 includes a first sheet layer 310 and a second sheet layer 320 which are stacked on each other, the first sheet layer 310 is in contact with the copper bar 200, at least a portion of the second sheet layer 320 is in contact with the base 100, and a thermal conductivity of the first sheet layer 310 is greater than a thermal conductivity of the second sheet layer 320. Because the heat transfer sheet 300 comprises the first sheet layer 310 and the second sheet layer 320 which are overlapped with each other, the first sheet layer 310 is in contact with the copper bar 200, at least one part of the second sheet layer 320 is in contact with the base 100, and the thermal conductivity coefficient of the first sheet layer 310 is greater than that of the second sheet layer 320, therefore, the surface of the heat transfer sheet 300 in contact with the copper bar 200 has higher thermal conductivity coefficient, the thermal resistance is very small, and the heat flow passing through the heat transfer sheet 300 can be larger under the same temperature gradient.
Preferably, the insulating ability of the second sheet layer 320 is higher than that of the first sheet layer 310. Therefore, when the three-phase copper bar provided by the invention is used as a three-phase high-voltage connecting piece between a motor and a controller, the part of the heat transfer sheet 300 penetrating out of the through hole 110 can be in contact with the shell 600 of the motor, namely, the second sheet layer 320 of the heat transfer sheet 300 can be in contact with the shell 600 of the motor, and the second sheet layer 320 has high insulating capacity and relatively high heat conductivity coefficient, so that the high-voltage copper bar 200 can be prevented from being directly connected with the shell 600 of the motor and the shell 600 of the motor is enabled to have high voltage, and personal safety is threatened. It can be seen that the heat transfer sheet 300 of the present invention, which has the first sheet layer 310 and the second sheet layer 320 stacked on each other, has a high thermal conductivity and good insulating ability, when the three-phase copper bar provided by the invention is used as a three-phase high-voltage connecting piece between the motor and the controller, a part of the heat flow on the copper bar 200 can be guided to the casing 600 of the motor through the heat transfer sheet 300 without increasing the electric potential of the casing 600 of the motor, therefore, the heat transfer sheet 300 with such a structure can better enhance the heat dissipation effect of the copper bar 200, and is more helpful to reduce the temperature of the copper bar 200, so that the coupling relationship of the thermal field between the motor and the controller is weakened, and then can guarantee the performance of motor and controller respectively can not receive the restriction of temperature, can guarantee under the thermal stability motor and the output performance of controller.
Preferably, the base 100 is made of plastic. Because the plastic has a small heat conductivity coefficient, a high insulating ability and a high temperature resistance, the base 100 is made of the plastic, so that on one hand, the insulating ability of the base 100 can be enhanced, and the safety performance of the three-phase copper bar provided by the invention in the use process is improved, on the other hand, the base 100 has a small heat conductivity coefficient which is similar to heat insulation, so that heat on the copper bar 200 cannot be directly transferred to the base 100, even if the temperature of the base 100 can still be kept close to the ambient temperature and obviously lower than the temperature of the copper bar 200 under a long-time steady-state working condition, and the safety performance of the three-phase copper bar provided by the invention in the use process can be further ensured.
Preferably, a plurality of heat insulation walls 120 are arranged on the base 100, the base 100 is divided into three heat insulation cavities 130 separated from each other by the plurality of heat insulation walls 120, the number of the heat transfer sheets 300 is three, one copper bar 200 and one heat transfer sheet 300 are placed in each heat insulation cavity 130, and a through hole 110 for allowing at least a part of the heat transfer sheet 300 to pass through is arranged at the bottom of each heat insulation cavity 130. Referring to fig. 1 to 3 and 5, as shown in fig. 1 to 3 and 5, the base 100 is provided with four thermal insulation walls 120, the four thermal insulation walls 120 divide the base 100 into three thermal insulation cavities 130 separated from each other, in order to ensure that there are three heat transfer fins 300 between each of the copper bars 200 and the base 100, wherein each of the thermal insulation cavities 130 is provided with one of the copper bars 200 and one of the heat transfer fins 300, and the bottom of each of the thermal insulation cavities 130 is provided with a through hole 110 for passing at least a portion of the heat transfer fin 300 installed therein. Because the space between any two adjacent copper bars 200 is very small, if the heat insulation wall 120 is not arranged between any two adjacent copper bars 200, obvious heat convection and heat radiation can be generated between two adjacent copper bars 200, so that the temperature on the copper bars 200 can be increased. In the invention, the base 100 is provided with the plurality of heat insulation walls 120, the base 100 can be divided into three heat insulation cavities 130 which are mutually separated through the plurality of heat insulation walls 120, the three copper bars 200 are respectively placed in the heat insulation cavities 130 which are correspondingly arranged with the three copper bars 200, so that each copper bar 200 can work in relatively independent space, and the heat conductivity coefficient of the heat insulation walls 120 is very small and is similar to heat insulation, so that the heat field coupling relationship between any two adjacent copper bars 200 can be basically eliminated, the difficulty of analyzing the heat field of a single copper bar 200 is reduced, and convenience is provided for calculating the heat dissipation requirement of the copper bars 200 and designing the structure of the copper bar 200. The invention can improve the heat dissipation capacity of the copper bars 200 as much as possible in a narrow and limited space, can fully ensure the insulation effect, and weakens the thermal field coupling relationship between the motor and the controller and the thermal field coupling relationship between the copper bars 200, thereby ensuring the requirement of high-power output of the electric drive assembly and the use safety of the whole machine.
Preferably, the heat insulation wall 120 is integrally formed with the base 100. Because the heat insulation wall 120 and the base 100 are integrally formed, the production cost can be reduced, and the overall structure of the three-phase copper bar provided by the invention can be simplified.
Preferably, as shown in fig. 3, a mounting groove 140 for mounting the heat transfer sheet 300 is formed at the bottom of each insulation chamber 130, and the through hole 110 is formed at the bottom of the mounting groove 140. Therefore, the installation groove 140 for installing the heat transfer sheet 300 is formed in the bottom of each heat insulation cavity 130, and the through hole 110 is formed in the bottom of the installation groove 140, so that the heat transfer sheet 300 can be more conveniently installed and fixed, the stability of the overall structure of the three-phase copper bar provided by the invention is improved, and in addition, the space can be saved due to the arrangement.
Preferably, as shown in fig. 3, fixing posts 150 are provided at both ends of the mounting groove 140. Therefore, the fixing columns 150 are arranged at the two ends of the installation groove 140, so that the heat transfer sheet 300 installed in the installation groove 140 can be limited, the heat transfer sheet 300 is effectively prevented from shaking in the installation groove 140, and the stability of the three-phase copper bar provided by the invention in the use process can be further improved.
Preferably, as shown in fig. 3, two ends of the mounting groove 140 are provided with a fixing post 150, and the two fixing posts 150 are arranged diagonally. Because the two ends of the mounting groove 140 are respectively provided with the fixing post 150, and the two fixing posts 150 are arranged in a diagonal line, the arrangement can reduce the number of the fixing posts 150, simplify the overall structure of the invention, and ensure that the heat transfer sheet 300 arranged in the mounting groove 140 can be well fixed only by the two fixing posts 150 arranged in the diagonal line.
Preferably, as shown in fig. 3, a locking groove 210 matched with the fixing post 150 is arranged on the copper bar 200. Therefore, by arranging the clamping grooves 210 matched with the fixing columns 150 on the copper bar 200, when the copper bar 200 is installed in the heat insulation cavity 130 correspondingly arranged with the copper bar, the fixing columns 150 at two ends of the installation groove 140 in the heat insulation cavity 130 can be inserted into the clamping grooves 210, so that the copper bar 200 installed in the heat insulation cavity 130 can be further fixed through the clamping grooves 210 and the fixing columns 150 which are mutually clamped.
Preferably, as shown in fig. 3, one end of the heat transfer sheet 300 is provided with a notch 330. Accordingly, by providing the notch 330 at one end of the heat transfer sheet 300, it is more convenient to mount the heat transfer sheet 300 in the mounting groove 140 provided corresponding thereto. In addition, this arrangement also facilitates the removal of the heat transfer sheet 300 from the mounting groove 140.
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 heat transfer sheet 300 between the base 100 and the three copper bars 200, and at least one part of the heat transfer sheet 300 can penetrate out of the base 100, heat flow generated on the copper bars 200 can be led out through the heat transfer sheet 300, so that the temperature of the copper bars 200 can be effectively reduced, and the heat dissipation effect of the copper bars 200 can be improved, and 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, the performance of the motor and the controller can be ensured not to be limited by the temperature, the output performance of the motor and the controller under a thermal steady state can be ensured, and the requirement of high-power output of the electric drive assembly can be ensured, but also can ensure the use safety of the whole machine.
Preferably, a cooling water channel is formed in the housing 600 of the motor, and a portion of the heat transfer sheet 300 that penetrates through the through hole 110 can contact the housing 600 of the motor. Because be equipped with the cooling water course on the casing 600 of motor, just heat transfer piece 300 wears out the part of through-hole 110 can with the casing 600 of motor contacts, from this, through heat transfer piece 300 can be with rather than the partial heat flow on the copper bar 200 of contact leading-in the casing 600 of motor, because the heat capacity of the casing 600 of motor is relative the copper bar 200 is very big, moreover be provided with the cooling water course again on the casing 600 of motor, flow through the cooling water of cooling water course can be right the casing 600 cools off, therefore the heat flow of extra import is to almost nothing influences the thermal field of the casing 600 of motor.
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 housing 600 of the electric motor is provided with a boss 610 for contacting with the heat transfer sheet 300. Therefore, by providing the boss 610 for contacting with the heat transfer sheet 300 on the casing 600 of the motor, the portion of the heat transfer sheet 300 penetrating out of the base 100 can contact with the casing 600 through the boss 610, so that part of the heat flow on the copper bar 200 contacting with the heat transfer sheet 300 can be guided into the casing 600 of the motor through the heat transfer sheet 300.
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.
Claims (12)
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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910950653.9A CN110707449A (en) | 2019-10-08 | 2019-10-08 | Three-phase copper bar and electric drive assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910950653.9A CN110707449A (en) | 2019-10-08 | 2019-10-08 | Three-phase copper bar and electric drive assembly |
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| CN110707449A true CN110707449A (en) | 2020-01-17 |
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| CN201910950653.9A Pending CN110707449A (en) | 2019-10-08 | 2019-10-08 | Three-phase copper bar and electric drive assembly |
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Cited By (1)
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|---|---|---|---|---|
| CN111600169A (en) * | 2020-05-18 | 2020-08-28 | 安徽江淮汽车集团股份有限公司 | Switching copper bar |
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Application publication date: 20200117 |