CN101187364A - Inverter-integrated electric compressor - Google Patents
Inverter-integrated electric compressor Download PDFInfo
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- CN101187364A CN101187364A CN 200710007221 CN200710007221A CN101187364A CN 101187364 A CN101187364 A CN 101187364A CN 200710007221 CN200710007221 CN 200710007221 CN 200710007221 A CN200710007221 A CN 200710007221A CN 101187364 A CN101187364 A CN 101187364A
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- electric compressor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
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Abstract
An inverter-integrated electric compressor enhances vibration resistance of an inverter apparatus integrated with a housing without degrading cooling performance, reduction in weight, or the ease of assembly of the inverter apparatus. An inverter-integrated electric compressor 1 has an inverter apparatus 22 integrated with an inverter storage box 11 of a housing 3 . The inverter apparatus 22 includes a metal plate 23 secured in an inverter storage box 11 ; a plurality of power semiconductor switching elements 24 mounted on the metal plate 23 ; a power substrate 25 on which a power-related control circuit for operating the power semiconductor switching elements 24 is mounted; and a busbar assembly 26 formed by integrating a plurality of busbars with an insulator. The metal plate 23 includes a protrusion 33 extending in a width direction perpendicular to a motor shaft direction L of an electric motor.
Description
Technical field
The present invention relates to mainly be applicable to the inverter-integrated electric compressor of air conditioner for vehicles.
The present invention is based on Japanese patent application No. 2006-315771 and 2006-315772, its content is incorporated in this.
Background technique
In recent years, in automobile industry,, as hybrid vehicle and electric vehicle or fuel cell car, utilize the exploitation and the input of the vehicle that electric power travels sharply to advance to market in order to tackle the energy environment problem.
On the other hand, different with existing aircondition in these vehicles, the aircondition of lift-launch is to possess by being the motor compressor of the electrical motor driven of power with the electricity.
In addition, as above-mentioned motor compressor, be that compressor and electric motor are built in sealed electrical compressor in the housing, employing be will from the direct current of power supply via DC-to-AC converter convert to threephase AC and to power electric motors, can be according to the motor compressor of the rotating speed of the variable control compressor of air-conditioning load.
In addition, in the motor compressor that inverter drives, proposed multiple inverter-integrated electric compressor, adopted DC-to-AC converter pack into motor compressor housing and incorporate formation.
Also have, as above-mentioned inverter-integrated electric compressor, known a kind of formation is in advance that metal substrate, power semiconductor, smmothing capacitor, busbar assembly, printed board is integrally formed as inverter assembly, the substrate of this inverter assembly is fastened on above the housing periphery of motor compressor, thereby, DC-to-AC converter is installed on the motor compressor (for example, opens the 2004-190547 communique) with reference to the spy.
Also have, as above-mentioned inverter-integrated electric compressor, propose a kind of scheme and be and to constitute the upper arm side switching element of each phase of three-phase inverter and 6 power MOS transistor devices (power semiconductor switching element) of underarm side switching element, on the smooth pedestal face of motor casing outer circumferential face, be listed as in abutting connection with configuration 3 at the electric motor axial direction, radially in abutting connection with configuration 2 row, 3 power MOS transistor devices by radially a side constitute upper arm side switching element, simultaneously 3 power MOS transistor devices by radially opposite side constitute underarm side switching element (for example, with reference to No. 3760887 communique of patent).
But, in the housing periphery of the motor compressor of as mentioned above DC-to-AC converter being packed into and under the incorporate situation, the cooling of the power semiconductor that DC-to-AC converter adopted is made of IGBT heater elements such as (Insulated Gate Bipolar Transistor) and become problem with respect to the resistance to vibration of the vibration of transmitting from vehicle side.
The cooling of above-mentioned heater element, the method for employing be with above-mentioned metal substrate (aluminium sheet) as radiator, the heat-absorbing action that utilizes the low temperature of the enclosure interior of the motor compressor of flowing through to suck refrigerant gas is cooled off.
In addition, for resistance to vibration, the method that adopts is to consider from aspects such as cost and lightweights, metal substrate adopts aluminum alloy system slab, simultaneously with this aluminum alloy system slab at a plurality of positions (common 4 positions) securely screw be fastened on case side, by special raising rigidity, improve eigentone.
But, under the situation of vehicle-mounted above-mentioned inverter-integrated electric compressor, usually make its motor drive shaft towards the vehicle fore-and-aft direction, the carriage of a side that makes inverter-integrated electric compressor along the side that is fixed on prime mover etc. is with 2 positions, bolton bottom, 1 position, top 3 positions up and down altogether.Therefore, when transmitting the vibration of above-below direction from vehicle body side, apply the vibration around motor axis on inverter-integrated electric compressor, via metal substrate, DC-to-AC converter has the possibility of resonance.
As its countermeasure, the fastening position of considering to thicken the thickness of slab of metal substrate or increase past case side is to improve rigidity, but, along with thickening thickness of slab or increase fastening position, and infringement is to cooling performance and the lightweight or the assembling performance of heater element, thereby as preferred, the resistance to vibration of DC-to-AC converter does not still become problem.
In addition, power MOS transistor device in the DC-to-AC converter of No. 3760887 described inverter-integrated electric compressor of communique of above-mentioned patent, the formation that adopts is that the perisporium with motor casing uses as radiator, refrigerant gas in the motor casing of flowing through is emitted the heat of generation, thereby, realize the reduction of the miniaturization and and the heat radiation resistance of DC-to-AC converter, realize the good cooling of DC-to-AC converter.
But, in the configuration of above-mentioned power MOS transistor device constituted, the flowing of the refrigerant gas in the motor casing of flowing through can't be distinguished the U-V-W phase switching element that cools off the upper arm side equably and the U-V-W phase switching element of underarm side.Thereby, produce imbalance in the cooling between each phase switching element, have the unsettled possibility of action.
Summary of the invention
The present invention promptly produces in view of above-mentioned thing, and its purpose is to provide a kind of can improve pack into the inverter-integrated electric compressor of resistance to vibration of DC-to-AC converter of housing of motor compressor of one under the situation of not damaging cooling performance and lightweight and assembling performance.
In addition, the objective of the invention is to, each phase switching element that can cool off the power semiconductor switching element that constitutes DC-to-AC converter respectively equably is provided and makes the inverter-integrated electric compressor of its action stabilization.
In order to address the above problem, inverter-integrated electric compressor of the present invention adopts following scheme.
Promptly, the inverter-integrated electric compressor of the 1st form of the present invention, be provided with the inverter accommodation section in the housing periphery of accommodating motor compressor, the DC-to-AC converter of packing in this inverter accommodation section, this DC-to-AC converter converts direct current power to three-phase ac power and to power electric motors, this inverter-integrated electric compressor is characterised in that described DC-to-AC converter possesses: the sheet metal that is fixedly installed on described inverter accommodation section; Be arranged on a plurality of power semiconductor switching elements on this sheet metal; Be arranged on the described sheet metal and the power substrate of the power system control circuit that makes the action of described power semiconductor switching element is installed; A plurality of busbars and the incorporate busbar assembly of each busbar utilization insulation material with the wiring that forms described DC-to-AC converter, and, described sheet metal possesses protruding part, and this protruding part extends on the width direction of the direction vertical with respect to the motor axis direction of described electric motor.
According to the 1st form of the present invention, a plurality of power semiconductor switching elements, power substrate and the busbar assembly etc. that constitute DC-to-AC converter are set on sheet metal, this sheet metal is fixedly installed on the inverter accommodation section of housing.In addition, sheet metal possesses the protruding part that extends on the width direction of the direction vertical with respect to the motor axis direction of electric motor, therefore, can improve sheet metal with respect to around the rigidity of the vibration of motor axis and improve resistance to vibration.Thereby, can under the situation of thickness of slab that does not increase sheet metal or fastening position, improve sheet metal easily and then be the resistance to vibration of DC-to-AC converter, can guarantee cooling performance and the lightweight and the assembling performance of DC-to-AC converter.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned inverter-integrated electric compressor, preferred described protruding part is provided with a plurality of in the described motor axis direction in described sheet metal upper edge with predetermined distance.
According to this formation, owing to predetermined distance a plurality of protruding parts are set, therefore, can increase substantially sheet metal with respect to rigidity around the vibration of motor axis along the motor axis direction.Thereby, can improve the resistance to vibration of sheet metal and DC-to-AC converter more.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned any one inverter-integrated electric compressor, preferred described protruding part is that the two end part bending of the direction vertical with described motor axis direction of described sheet metal is constituted.
According to this formation, the sheet metal two end part that are direction that will be vertical with the motor axis direction bend and the formation protruding part, and therefore, just the bending part on the sheet metal increases by 2 positions, and need not increase the amount of work manhours and sheet material especially, just protruding part can be set.Thereby, can under the state that suppresses manufacture cost, improve rigidity significantly, the resistance to vibration of DC-to-AC converter is improved.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned any one inverter-integrated electric compressor, preferred described power substrate is being arranged at the lug boss of described sheet metal by screw stop more than at least 3 positions.
Constitute according to this and since the power substrate more than at least 3 positions by the lug boss of screw stop at sheet metal, therefore, the power substrate not can owing to vibration take place loose, integrated and firmly fix and be arranged on lug boss with sheet metal.Thereby, can improve the rigidity of DC-to-AC converter, improve its resistance to vibration.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned inverter-integrated electric compressor, preferred described lug boss bends upward by the part with described sheet metal and is arranged at more than at least 3 positions, and wherein the kink at least 1 position bends on the direction parallel with described protruding part.
According to this formation, lug boss is arranged on more than 3 positions at least, wherein the kink at least 1 position bends on the direction parallel with protruding part, therefore, can make the kink of the direction parallel, together help to improve sheet metal with respect to rigidity around the vibration of motor axis with protruding part with this protruding part.Thereby, also can improve sheet metal thus with respect to rigidity around the vibration of motor axis, the resistance to vibration of sheet metal and DC-to-AC converter is improved.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned any one inverter-integrated electric compressor, preferred described busbar assembly is fixed on the described power substrate, and is configured in this power substrate is fixed between the screw stop position on the described sheet metal.
Constitute according to this, busbar assembly is configured in the power substrate is fixed between the screw stop position on the sheet metal, and therefore, busbar assembly performance beam action under installment state, can improve the rigidity of power substrate.Thereby, can improve the rigidity of DC-to-AC converter, further improve its resistance to vibration.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned inverter-integrated electric compressor, preferred described busbar assembly constitutes the L word shape, fixes along 2 limits of the adjacency of described power substrate.
Constitute according to this, constitute the busbar assembly of L word shape, fix, therefore, a plurality of busbars not only can be installed as parts, but also can be improved the power substrate with respect to the intensity of reversing along 2 limits of the adjacency of power substrate.Thereby, can improve the assembling performance and the resistance to vibration of DC-to-AC converter.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned any one inverter-integrated electric compressor, a plurality of terminals that preferred described a plurality of power semiconductor switching elements, straight line shape are arranged side by side from the side of each element L word shape bending upward and stretch out.
Constitute according to this, the bending of L word shape and a plurality of terminals of stretching out are arranged in a straight line shape and are provided with upward from the side of power semiconductor switching element, therefore, can make the stress equalizing that vibration produced of the overbending direction that puts on each terminal.Thereby, can further improve the power semiconductor switching element and then be the resistance to vibration of DC-to-AC converter.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned inverter-integrated electric compressor, preferred a plurality of terminals that stretch out from described each element are arranged in the straight line shape of the direction parallel with described protruding part and are provided with.
Constitute according to this, a plurality of terminals that stretch out from each element are arranged in the straight line shape of the direction parallel with protruding part and are provided with, and therefore, can be arranged on the direction that has been improved rigidity by protruding part by each crooked easily terminal when applying vibration on the overbending direction.Thereby, can improve the power semiconductor switching element more and then be the resistance to vibration of DC-to-AC converter.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned any one inverter-integrated electric compressor, preferred described sheet metal at least four angles are fixed on the face that is provided with of described inverter accommodation section by screw stop.
According to this formation, sheet metal at least four angles are fixed on the face that is provided with of inverter accommodation section by screw stop, therefore, can be via having improved by protruding part with respect to sheet metal around the rigidity of the vibration of motor axis, with four jiaos of DC-to-AC converters securely screw stop be fixed on being provided with on the face of inverter accommodation section side of housing.Thereby, can improve the resistance to vibration of DC-to-AC converter, and guarantee cooling performance and the lightweight and the assembling performance of DC-to-AC converter.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned inverter-integrated electric compressor, preferred described sheet metal is fixed on the face that is provided with of described inverter accommodation section at least by screw stop in its substantial middle portion except that described four jiaos.
According to this formation, sheet metal is fixed on the face that is provided with of inverter accommodation section in its substantial middle portion by screw stop at least except that four jiaos, therefore, can improve the rigidity of sheet metal efficiently.Thereby, can alleviate the stress that is applied on the terminal of the power semiconductor switching element that is arranged on the sheet metal, improve the resistance to vibration of DC-to-AC converter more.
Also have, the inverter-integrated electric compressor of above-mentioned the 1st form, in above-mentioned any one inverter-integrated electric compressor, preferred described sheet metal is an aluminum alloy system.
According to this formation, sheet metal is an aluminum alloy system, therefore, can utilize the good thermal conduction characteristic and the light weight of aluminum alloy, improves the cooling performance of DC-to-AC converter and realizes its lightweight.
In addition, the inverter-integrated electric compressor of the 2nd form of the present invention, be provided with the inverter accommodation section in the housing periphery of accommodating motor compressor, the DC-to-AC converter of packing in this inverter accommodation section, this DC-to-AC converter converts direct current power to three-phase ac power and to power electric motors, this inverter-integrated electric compressor is characterised in that, described DC-to-AC converter possesses the upper arm side switching element of each phase that constitutes three-phase inverter and a plurality of power semiconductor switching elements of lower wall side switching element, described power semiconductor switching element, the described upper arm side switching element of one phase and described underarm side switching element are arranged 2 row in the motor axis direction of described electric motor in couples, in each row of these 2 row, on the direction vertical with described motor axis direction, the described upper arm side switching element of each phase and described underarm side switching element are arranged side by side respectively.
According to the 2nd form of the present invention, constitute in a plurality of power semiconductor switching elements of DC-to-AC converter, the upper arm side switching element of one phase and underarm side switching element are arranged 2 row in the motor axis direction of electric motor in couples, in each row of these 2 row, on the direction vertical with described motor axis direction, the described upper arm side switching element of each phase and described underarm side switching element are arranged side by side respectively, thereby, can distinguish the upper arm side switching element and the underarm side switching element that cool off each phase equably.Thereby, the imbalance of the cooling between each phase switching element can not take place, can make the action stabilization of power semiconductor switching element.
Also have, the inverter-integrated electric compressor of above-mentioned the 2nd form, in above-mentioned inverter-integrated electric compressor, preferred described underarm side switching element is disposed at the suction side of the refrigerant gas that flows in described housing.
According to this formation, underarm side switching element by the comparison refrigerant of low temperature gas cooling of the close suction side of flowing, thereby can improve the cooling effectiveness of underarm side switching element in housing.In addition, thus can be in the inverter substrate-side, anodal pattern arrangement that will be corresponding with the upper arm side of sending noise easily uses the negative pole pattern corresponding with stable underarm side that it is surrounded near motor terminal, thereby, can reduce emitting of switching noise.
Also have, the inverter-integrated electric compressor of above-mentioned the 2nd form, in above-mentioned any one inverter-integrated electric compressor, preferred described power semiconductor switching element, directly or via radiating fin be arranged on the heat dispersing surface, this heat dispersing surface is arranged at described inverter accommodation section.
According to this formation, the power semiconductor switching element, directly or via radiating fin be arranged on the heat dispersing surface, heat dispersing surface is arranged at the inverter accommodation section, thereby can make the heat sent from the power semiconductor switching element from heat dispersing surface by shell body wall, effectively to the refrigerant of low temperature gas heat radiation of in housing, flowing.Thereby, can improve cooling effect to the power semiconductor switching element, alleviate its thermal load.
Also have, the inverter-integrated electric compressor of above-mentioned the 2nd form, in above-mentioned inverter-integrated electric compressor, preferred described heat dispersing surface is the cutting finish surface.
According to this formation, heat dispersing surface is the cutting finish surface, thereby, can improve the pyroconductivity on the heat dispersing surface, improve radiating efficiency from power semiconductor switching element side direction refrigerant gas side.Thereby, can improve the cooling effect of power semiconductor switching element as much as possible.
Also have, the inverter-integrated electric compressor of above-mentioned the 2nd form, in above-mentioned inverter-integrated electric compressor, preferred described heat dispersing surface is divided into the heat dispersing surface that heat dispersing surface that described upper arm side switching element uses and described underarm side switching element are used, and is non-cutting portion between the two.
Constituting according to this, usually in the housing of die casting, be partitioned into 2 as the heat dispersing surface of cutting finish surface, be non-cutting portion between the two, and therefore, can suppress cutting partly is necessary irreducible minimum.Thereby, can in housing, be suppressed at the possibility of exposing casting defect on the cutting finish surface as die casting, prevent via casting defect leakage of refrigerant gas.
According to the present invention, because the protruding part that on the width direction that is arranged on the direction vertical on the sheet metal, extends with respect to the motor axis direction of electric motor, thereby, can improve sheet metal with respect to around the rigidity of the vibration of motor axis and improve resistance to vibration.Thereby, can under the situation of thickness of slab that does not increase sheet metal or fastening position, improve sheet metal easily and then be the resistance to vibration of DC-to-AC converter, can guarantee cooling performance and the lightweight and the assembling performance of DC-to-AC converter.
In addition, according to the present invention, owing to can utilize the interior refrigerant gas of the housing of flowing through that the upper arm side switching element and the underarm side switching element of each phase of a plurality of power semiconductor switching elements of formation DC-to-AC converter are cooled off respectively equably, thereby, the imbalance of the cooling between each phase switching element can not take place, and can make the action stabilization of power semiconductor switching element.
Description of drawings
Fig. 1 is the outward appearance side view of the inverter-integrated electric compressor of one embodiment of the present invention.
Fig. 2 is an inverter-integrated electric compressor shown in Figure 1 plan view with respect to the installment state of vehicle.
Fig. 3 is the exploded perspective view of observing from the motor shell side of inverter-integrated electric compressor shown in Figure 1.
Fig. 4 is the top perspective view of the motor casing of inverter-integrated electric compressor shown in Figure 1.
Fig. 5 is packed into the top perspective view of motor casing of state of DC-to-AC converter of inverter-integrated electric compressor shown in Figure 1.
Fig. 6 is the approximate vertical view that the arrangement of the IGBT in the DC-to-AC converter of inverter-integrated electric compressor shown in Figure 1 constitutes.
Fig. 7 is the stereogram of sheet metal that constitutes the DC-to-AC converter of inverter-integrated electric compressor shown in Figure 1.
Fig. 8 is the stereogram of state of separative power substrate portion of the DC-to-AC converter of inverter-integrated electric compressor shown in Figure 1.
Fig. 9 is the side view of the direction vertical with the motor drive shaft direction of the DC-to-AC converter of inverter-integrated electric compressor shown in Figure 1.
Embodiment
Below, with reference to Fig. 1～Fig. 9 one embodiment of the present invention is described.
Fig. 1 represents the outward appearance side view of the inverter-integrated electric compressor 1 of one embodiment of the present invention.Inverter-integrated electric compressor 1 has the housing 2 that constitutes its shell.Housing 2 will be accommodated the motor casing 3 that omits illustrated electric motor by bolt 5 and accommodate the compressor housing 4 that omits illustrated compressor and closely is fixed as one and constitute.This motor casing 3 and compressor housing 4 are made for die casting.
Accommodate the illustrated electric motor of omission and the compressor that are arranged in motor casing 3 and the compressor housing 4, link, rely on the rotation of electric motor and Driven Compressor via motor drive shaft.Rearward end (Fig. 1 right side) at motor casing 3 is provided with suction port 6, from this suction port 6 be drawn into low pressure refrigerant gas in the motor casing 3 around the electric motor circulation after, sucked and be compressed by compressor.By the refrigerant gas of the High Temperature High Pressure after the compressor compresses, be discharged in the compressor housing 4 after, discharge to the outside from the exhaust port 7 of the forward end (Fig. 1 left side) that is arranged on compressor housing 4.
On housing 2, in the bottom of the rear end side (Fig. 1 right side) of motor casing 3 and 1 position of upper side of 2 positions, bottom of the forward end of compressor housing 4 (Fig. 1 left side) and compressor housing 4 amount to 3 positions installation foot 8A, 8B, 8C be set.Inverter-integrated electric compressor 1 by above-mentioned installation foot 8A, 8B, 8C, utilizes bolt etc. to be fixedly installed on the cantilevered bracket 10, thereby is equipped on vehicle as shown in Figure 2, and cantilevered bracket 10 is arranged on vehicle driving with the sidewall of prime mover 9 etc.Like this, inverter-integrated electric compressor 1 normally makes the one side along cantilevered bracket 10, makes motor axis direction L towards the vehicle fore-and-aft direction, by 3 cantilever support up and down.
In addition, at motor casing 3 outer circumferential faces, the inverter accommodation section 11 of integrally formed box shape at an upper portion thereof.Inverter accommodation section 11 has the box structure that the surrounding wall by specified altitude opened above impales as shown in Figures 3 and 4.Side in inverter accommodation section 11, be provided with 2 feed cable conveying ends 12, and, inside in inverter accommodation section 11, the P-N terminal 13, motor terminal mounting hole 14, sheet metal that are provided with the direct current power that connects feed cable with heat dispersing surface 15, sheet metal with lug boss 16 and CPU substrate being set with lug boss 17 etc. is set.In addition, in inverter accommodation section 11, accommodate and be provided with the motor terminal 19 that is installed in the motor terminal mounting hole 14, preposition capacitor (head capacitor) 20, inductor 21, DC-to-AC converter 22 etc., cover by screw stop fixed cover member 18 above it.
Above-mentioned heat dispersing surface 15, be used for the heating of 6 power semiconductor switching elements 24 described later is dispelled the heat via the low-temperature refrigerant gas of shell body wall in the motor casing 3 of flowing through, the formation of employing is to be divided into the U-V-W3 upper arm side switching element 24A and the underarm side switching element 24B mutually of three-phase inverter to distinguish corresponding 2 heat dispersing surface 15A, 15B.These 2 heat dispersing surface 15A, 15B are that the accurately machined working surface of cutting has been passed through on the surface.In addition, other major parts between above-mentioned 2 heat dispersing surface 15A, 15B that comprise of the internal surface of inverter accommodation section 11 are kept the casting surface of die casting.
DC-to-AC converter 22, as Fig. 3 and shown in Figure 5, its contact with the heat dispersing surface 15 of inverter accommodation section 11 and four jiaos be fixedly set in lug boss 16, comprise the aluminum alloy system sheet metal 23 that plays a role as radiator, be arranged on the upper arm side switching element of each phase of formation three-phase inverter on this sheet metal 23 and 6 power semiconductor switching elements of underarm side switching element (hereinafter referred to as " IGBT " (Insulated Gate Bipolar Transistor).) 24 (with reference to Fig. 5,6,8), the power system control circuit that makes IGBT24 action and the power substrate 25 that is arranged on the lug boss on the sheet metal 23 are installed, have the busbar (bus bar) of the wiring of a plurality of formation DC-to-AC converters 22 and to be resin with the insulation material make the incorporate busbar assembly 26 of each busbar, installation have CPU etc. to be arranged on CPU substrate 27 on the lug boss 17 at the circuit of the element that moves under the low voltage and Corner Strapped by inlaying to be shaped.
Aluminum alloy system sheet metal 23 is as Fig. 5 and shown in Figure 7, and the stamping-out making sheet for square shape is equipped with screw stop hole 30 at Qi Sijiao, in order to utilize screw 34 with the lug boss 16 of sheet metal 23 screw stops in inverter accommodation section 9.This sheet metal 23 is provided with in order to a plurality of holes 31 that 6 IGPT24 are set and in order to a plurality of lug boss 32A～32D of power substrate 25 to be set.In addition, on sheet metal 23, in order to improve the rigidity of the direction vertical, be provided with the rib (protruding part) 33 that the two end part with motor axis direction L are bent to form upward and extend at its width direction with motor axis direction L.
Also have, on sheet metal 23, except four jiaos screw stop hole 30, can also wear screw stop hole 30A in its substantial middle portion.
In order to firmly fix power substrate 25, and (in the present embodiment be 4) more than the position with the part of sheet metal 23 and bend upward above-mentioned lug boss 32A～32D is set at 3 at least.The kink of the lug boss 32A at least 1 position is to being provided with the vertical direction of motor axis direction L, promptly parallel with rib (protruding part) 33 direction bending among this lug boss 32A～32D.
Also have, rib (projecting strip part) 33 is not limited to the two end part bending of sheet metal 23 is provided with, also can be in the middle of the cardinal principle of this plate, separate predetermined distance and (2 more than the position) is provided with protruding part at a plurality of positions abreast.
6 IGBT24 as Fig. 5 and shown in Figure 6, have respectively via resin mold and form square shape, extend and 2 main electrode terminals of the L word shape of bending upward and 1 control electrode terminal amount to the terminal 40 of 3 shapes that are arranged in a straight line from the one side to the side.These 6 IGBT24, wherein with corresponding 3 IGBT24A of the U-V-W3 of upper arm side and with corresponding 3 IGBT24B of the U-V-W3 of underarm side, be respectively that 33 ground, terminal 40 ground opposite each other of the shape that is arranged in a straight line are set up in parallel in the direction perpendicular to motor axis direction L, thereby, be arranged in 2 row at motor axis direction L, be fixedly installed on the above-mentioned sheet metal 23 with Screw etc. via omitting illustrated insulating trip.
That is to say, upper arm side IGBT24A that 6 its configurations of IGBT24 are wherein phases and underarm side IGBT24B are arranged in 2 row at motor axis direction L in couples, in each row of these 2 row, 3 the upper arm side IGBT24A and the underarm side IGBT24B of each phase are set up in parallel respectively in the direction perpendicular to motor axis direction L.
And, be respectively that above-mentioned 3 upper arm side IGBT24A and heat dispersing surface 15A are fixed on the sheet metal 23 accordingly, in addition, 3 underarm side IGBT24B and heat dispersing surface 15B are fixed on the sheet metal 23 accordingly.Thereby underarm side IGBT24B is configured in from the upstream side of the refrigerant gas stream of suction port 6 suctions.
The power substrate 25 of power system control circuit is installed,, has the attachment hole of 18 butt 40 that embed 6 IGBT24, embed terminal 40 in this attachment hole, with the conductive pattern soldering around it as Fig. 3, Fig. 8 and shown in Figure 9.The circuit of power substrate 25 has according to from the instruction intermittent controlled IGBT24 of outside and to the function of power electric motors with send the function etc. of the drive condition of electric motor to the outside.This power substrate 25 is fixedly installed on 4 lug boss 32A～32D of sheet metal 23 via screw 45, and is integrated with sheet metal 23.
As mentioned above, DC-to-AC converter 22, its formation is that 6 IGBT24, power substrate 25 and busbar assembly 26 are set on sheet metal 23, and this DC-to-AC converter 22 is accommodated in the inverter accommodation section 11 that is arranged on motor casing 3 bottom surface of sheet metal 23 and heat dispersing surface 15A, 15B contiguously.Also have, at an upper portion thereof, CPU substrate 27 screw stops that constitute DC-to-AC converter 22 are provided with being provided with on the lug boss 17 at the CPU substrate, by 18 coverings of lid member on it.
According to the present embodiment of above explanation, reach following action effect.
It is interior and integrated with motor compressor 1 that DC-to-AC converter 22 is accommodated the inverter accommodation section 11 that is arranged on motor casing 3.This DC-to-AC converter 22 possesses the sheet metal 23 of aluminum alloy system, and its setting is that the bottom surface of this sheet metal 23 contacts with the heat dispersing surface 15 of inverter accommodation section 11, and IGBT24 constant power system heater element is set thereon.Therefore, utilize from suction port 6 and be drawn into motor casing 3 and around the refrigerant gas of the low-temp low-pressure of electric motor circulation, via motor casing 3 cooling aluminum alloy system sheet metals 23.Thereby sheet metal 23 becomes radiator, and the heat that IGBT24 etc. send is dispelled the heat, thereby can cool off heater elements such as IGBT24.
Thereby, the necessary heat-generating system parts of cooling (element) that constitute DC-to-AC converter 22 can be utilized low-temperature refrigerant gas force cooling effectively, can guarantee the refrigerating function of DC-to-AC converter 22.
That is to say, constitute among 6 IGBT24 (power semiconductor switching element) of three-phase inversion apparatus 22 with corresponding 3 IGBT24A of the U-V-W3 of upper arm side and with corresponding 3 IGBT24B of the U-V-W3 of underarm side, each 33 ground, terminal 40 ground opposite each other are set up in parallel in the direction perpendicular to motor axis direction L, thereby, be arranged in 2 row at motor axis direction L, be fixedly installed on the sheet metal 23 via Screw etc.The heating of these IGBT24A and IGBT24B passes to heat dispersing surface 15A, the 15B of inverter accommodation section 11 via sheet metal 23, by the shell body wall of motor casing 3, to the refrigerant gas heat radiation of its inner low-temp low-pressure of flowing through.Thereby, be forced to cooling as the IGBT24 of heater element.
Thereby, can be with sheet metal 23 and motor casing 3 as radiator, utilize the refrigerant gas of low-temp low-pressure to cool off the integral body of the DC-to-AC converter 22 that comprises IGBT24 effectively, can reduce the thermal load of DC-to-AC converter 22.In addition, 6 IGBT24 arrange as mentioned above, thereby can distinguish upper arm side IGBT24A and the underarm side IGBT24B that cools off each phase of U-V-W equably.Thereby, can not produce the cooling imbalance between each phase IGBT24, make the action stabilization of IGBT (power semiconductor switching element) 24.
In addition, underarm side IGBT24B is configured in the upstream side near the refrigerant gas stream of suction port 6, utilizes more that refrigerant of low temperature gas cools off, thereby can further improve the cooling effectiveness of the IGBT24B of underarm side.Thereby, in power substrate 25 sides, can with the anodal pattern arrangement corresponding near motor terminal 19, use the negative pole pattern corresponding that it is surrounded with stable underarm side with the upper arm side of sending noise easily, thereby, emitting of switching noise can be reduced.
In addition, be provided with heat dispersing surface 15A, 15B in inverter accommodation section 11, contacting the IGBT24 that is provided with on the aluminum alloy system sheet metal 23 with heat sinking function as heater element with this heat dispersing surface 15A, 15B, therefore, can make the heat that produces from IGBT24, from heat dispersing surface 15A, 15B shell body wall by motor casing 3, the heat radiation of the low-temperature refrigerant gas in the motor casing 3 of flowing through effectively.Thereby, can improve cooling effect to IGBT (power semiconductor switching element) 24, alleviate its thermal load.
Particularly heat dispersing surface 15 is divided into 2 heat dispersing surface 15A, the 15Bs corresponding, makes its surface be respectively the cutting finish surface, therefore, can improve the pyroconductivity of heat dispersing surface 15A, 15B with upper arm side IGBT24A and underarm side IGBT24B.Thereby, can improve from the radiating efficiency of IGBT24 side direction refrigerant gas side, improve the cooling effect of IGBT24 as much as possible.
Also has the casting surface when not keeping die casting as passing through cutting between 2 heat dispersing surface 15A, 15B of cutting finish surface.Like this, the part of cutting is defined as heat dispersing surface 15A, 15B, keep casting surface as much as possible, thereby, can be in housing as die casting, be suppressed at cutting and show out the possibility of casting defect (bubble seam (ingot piping)), prevent by casting defect leakage of refrigerant gas.
In addition, on inverter-integrated electric compressor 1, the vibration of vehicle side is directly propagated via carriage 10.This vibration is also intactly propagated into the DC-to-AC converter 22 of accommodating the inverter accommodation section 11 that is arranged on motor casing 3, as to the exciting force of DC-to-AC converter 22 and act on.Particularly, the vibration of vehicle above-below direction, origin is in the mounting structure of inverter-integrated electric compressor 1 with respect to vehicle, become vibration around the motor axis of motor compressor 1, passing to inverter-integrated electric compressor 1 is DC-to-AC converter 22, produces the possibility of DC-to-AC converter 22 resonance.
But, DC-to-AC converter 22 is arranged on the sheet metal 23 of aluminum alloy system as mentioned above, on this sheet metal 23, with the vertical direction of motor axis direction L, extend at its width direction and to be provided with the rib (protruding part) 33 that the two end part with motor axis direction L are bent to form upward.Thereby sheet metal 23 can improve rigidity significantly with respect to the vibration around motor axis, increases eigentone, thereby can suppress the resonance of DC-to-AC converter 22 by above-mentioned generation.
Thereby, can or increase under the situation of fastening position etc. at the thickness of slab that does not add thick sheet metal 23, improve sheet metal 23 easily and then be the resistance to vibration of DC-to-AC converter 22.In addition, sheet metal 23 contacts with the heat dispersing surface 15 of inverter accommodation section 11, fixed by screw stop at least four angles, therefore, via having improved by rib (protruding part) 33 with respect to sheet metal around the rigidity of the vibration of motor axis, can with 22 4 jiaos of DC-to-AC converters securely screw stop be fixed on the inverter accommodation section 11 of housing 3.Thereby, can improve DC-to-AC converter 22 whole rigidity, improve resistance to vibration, and guarantee cooling performance and the lightweight and the assembling performance of DC-to-AC converter 22.
In addition, sheet metal 23 is an aluminum alloy system, thereby, can utilize the good thermal conduction characteristic and the light weight of aluminum alloy, improve the cooling performance of DC-to-AC converter 22 and realize its lightweight.
In addition, rib (protruding part) the 33rd bends its end upward and forms at the two ends of sheet metal 23, thereby, need not increase the amount of work manhours and sheet material especially, just can be provided for improving the rib (protruding part) 33 of rigidity.Thereby, can be in the width direction whole rigidity that suppresses to improve under the state of manufacture cost sheet metal 23 perpendicular to motor axis direction L.
In addition, be arranged on the power substrate 25 on the sheet metal 23, also, integrated with sheet metal 23 at least at 3 lug boss 32A～32D that (in the present embodiment are 4) more than the position and are fixed on by screw stop securely sheet metal 23.Thereby, can improve the rigidity of DC-to-AC converter 22 integral body with respect to vibration, improve resistance to vibration.Particularly among the lug boss 32A～32D of constant power substrate 25 kink of the lug boss 32A at least 1 position to the vertical direction of motor axis direction L, i.e. the direction bending parallel with rib (protruding part) 33, thereby can make this kink help to improve with respect to rigidity around the vibration of motor axis, can further improve the resistance to vibration of DC-to-AC converter 22.
In addition, on power substrate 25, one is fixed with the busbar assembly 26 that utilizes insulation material (resinous wood) one to inlay the L word shape of shaping between the both sides of its adjacency.And this busbar assembly 26 is configured in 45 on a plurality of screws of power substrate 25 screw stops on sheet metal 23, thereby, busbar assembly 26 performance beam actions.Thereby, also can improve the assembling intensity and the torsional strength of power substrate 25, improve the resistance to vibration of DC-to-AC converter 22.Also have, busbar assembly 26 is packed into for wiring a plurality of busbars are integrated, form DC-to-AC converter 22 as parts, thereby the assembling performance that can improve DC-to-AC converter 22 is self-evident.
In addition, its setting of IGBT24 is 3 IGBT24A of upper arm side and 3 IGBT24B of underarm side, make bend extension upward from side separately terminal 40 opposite each otherly on perpendicular to the direction of motor axis direction L 33 ground be set up in parallel 2 row, also have, each terminal 40 is arranged in perpendicular to the straight line shape of the direction of motor axis direction L and is provided with.Thereby, can make the vibration of overbending direction put on stress equalizing on each terminal 40, simultaneously, can utilize the rigidity of rib (protruding part) 33 to improve the anti-intensity of shaking of each terminal 40.Thereby, can improve IGBT24 and then be the resistance to vibration of DC-to-AC converter 22.
In addition, sheet metal 23 also wears screw stop hole 30A in its substantial middle portion except that above-mentioned four jiaos, sheet metal 23 screw stops are fixed on inverter accommodation section 11, thereby, can improve the rigidity of sheet metal 23 efficiently.Thereby, can alleviate the stress that the IGBT24 that is arranged on the sheet metal 23 puts on terminal 40, improve the resistance to vibration of DC-to-AC converter 22 more.
Also have, in the above-mentioned mode of execution, what adopt about sheet metal 23 is stamping-out system, but, also can adopt pressing mold system.
In addition, in the above-mentioned mode of execution, be illustrated for the example on the sheet metal 23 that IGBT (power semiconductor switching element) 24 is fixedly installed on aluminum alloy system, but, the present invention is not limited thereto, and also can adopt IGBT24 directly is fixedly installed on formation on the heat dispersing surface that motor casing 3 sides form via insulating trip etc.
In addition, in the above-mentioned mode of execution, adopt resin molded discrete articles, but, be not limited thereto, also can adopt bare chip goods or MOS (Metal Oxide Semeconductor) as IGBT (power semiconductor switching element) 24.
In addition, be illustrated for the mode of execution of the side of the rear end side that suction port 6 is arranged on motor casing 3, but, suction port 6 also can be arranged on motor casing 3 ear end faces.
Also have,, omitted the explanation of its formation, but, can adopt the compressor of any model for compressor.
Claims (17)
1. inverter-integrated electric compressor, be provided with the inverter accommodation section in the housing periphery of accommodating motor compressor, the DC-to-AC converter of packing in this inverter accommodation section, this DC-to-AC converter converts direct current power to three-phase ac power and to power electric motors, this inverter-integrated electric compressor is characterised in that
Described DC-to-AC converter possesses: the sheet metal that is fixedly set in described inverter accommodation section; Be arranged on a plurality of power semiconductor switching elements on this sheet metal; Be arranged on the described sheet metal and the power substrate of the power system control circuit that makes the action of described power semiconductor switching element is installed; A plurality of busbars and the incorporate busbar assembly of each busbar utilization insulation material with the wiring that forms described DC-to-AC converter, and,
Described sheet metal possesses protruding part, and this protruding part extends on the width direction of the direction vertical with respect to the motor axis direction of described electric motor.
2. inverter-integrated electric compressor according to claim 1 is characterized in that,
Described protruding part is provided with a plurality of in the described motor axis direction in described sheet metal upper edge with predetermined distance.
3. inverter-integrated electric compressor according to claim 1 and 2 is characterized in that,
Described protruding part is that the two end part bending of the direction vertical with described motor axis direction of described sheet metal is constituted.
4. according to each described inverter-integrated electric compressor in the claim 1～3, it is characterized in that,
Described power substrate is being arranged at the lug boss of described sheet metal by screw stop more than at least 3 positions.
5. inverter-integrated electric compressor according to claim 4 is characterized in that,
Described lug boss bends upward by the part with described sheet metal and is arranged at more than at least 3 positions, and wherein the kink at least 1 position bends on the direction parallel with described protruding part.
6. according to claim 4 or 5 described inverter-integrated electric compressors, it is characterized in that,
Described busbar assembly is fixed in described power substrate, and is configured in this power substrate is fixed between the screw stop position of described sheet metal.
7. inverter-integrated electric compressor according to claim 6 is characterized in that,
Described busbar assembly constitutes the L word shape, fixes along 2 limits of the adjacency of described power substrate.
8. according to each described inverter-integrated electric compressor in the claim 1～7, it is characterized in that,
A plurality of terminals that described a plurality of power semiconductor switching element, straight line shape are arranged side by side from the side of each element L word shape bending upward and stretch out.
9. inverter-integrated electric compressor according to claim 8 is characterized in that,
From a plurality of terminals that described each element stretches out, be arranged in the straight line shape of the direction parallel and be provided with described protruding part.
10. according to each described inverter-integrated electric compressor in the claim 1～9, it is characterized in that,
Described sheet metal at least four angles are fixed on the face that is provided with of described inverter accommodation section by screw stop.
11. inverter-integrated electric compressor according to claim 10 is characterized in that,
Described sheet metal is fixed on the face that is provided with of described inverter accommodation section at least by screw stop in its substantial middle portion except that described four jiaos.
12. according to each described inverter-integrated electric compressor in the claim 1～11, it is characterized in that,
Described sheet metal is an aluminum alloy system.
13. inverter-integrated electric compressor, be provided with the inverter accommodation section in the housing periphery of accommodating motor compressor, the DC-to-AC converter of packing in this inverter accommodation section, this DC-to-AC converter converts direct current power to three-phase ac power and to power electric motors, this inverter-integrated electric compressor is characterised in that
Described DC-to-AC converter possesses the upper arm side switching element of each phase that constitutes three-phase inverter and a plurality of power semiconductor switching elements of lower wall side switching element,
Described power semiconductor switching element, the described upper arm side switching element of one phase and described underarm side switching element are arranged 2 row in the motor axis direction of described electric motor in couples, in each row of these 2 row, on the direction vertical with described motor axis direction, the described upper arm side switching element of each phase and described underarm side switching element are arranged side by side respectively.
14. inverter-integrated electric compressor according to claim 13 is characterized in that,
Described underarm side switching element is disposed in described housing the suction side of the refrigerant gas that flows.
15. according to claim 13 or 14 described inverter-integrated electric compressors, it is characterized in that,
Described power semiconductor switching element directly or via radiating fin is arranged on the heat dispersing surface, and this heat dispersing surface is arranged at described inverter accommodation section.
16. inverter-integrated electric compressor according to claim 15 is characterized in that,
Described heat dispersing surface is the cutting finish surface.
17. according to claim 15 or 16 described inverter-integrated electric compressors, it is characterized in that,
Described heat dispersing surface is divided into the heat dispersing surface that heat dispersing surface that described upper arm side switching element uses and described underarm side switching element are used, and is non-cutting portion between the two.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-315772 | 2006-11-22 | ||
| JP2006315771A JP4719134B2 (en) | 2006-11-22 | 2006-11-22 | Inverter-integrated electric compressor |
| JP2006315771 | 2006-11-22 | ||
| JP2006-315771 | 2006-11-22 | ||
| JP2006315772A JP5030551B2 (en) | 2006-11-22 | 2006-11-22 | Inverter-integrated electric compressor |
| JP2006315772 | 2006-11-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101187364A true CN101187364A (en) | 2008-05-28 |
| CN101187364B CN101187364B (en) | 2010-05-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710007221 Expired - Fee Related CN101187364B (en) | 2006-11-22 | 2007-01-25 | Inverter-integrated electric compressor |
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| Country | Link |
|---|---|
| JP (1) | JP4719134B2 (en) |
| CN (1) | CN101187364B (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN101187364B (en) | 2010-05-19 |
| JP4719134B2 (en) | 2011-07-06 |
| JP2008128142A (en) | 2008-06-05 |
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