CN105264752A - Electric machine with liquid cooled housing - Google Patents
Electric machine with liquid cooled housing Download PDFInfo
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- CN105264752A CN105264752A CN201480030720.0A CN201480030720A CN105264752A CN 105264752 A CN105264752 A CN 105264752A CN 201480030720 A CN201480030720 A CN 201480030720A CN 105264752 A CN105264752 A CN 105264752A
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- Prior art keywords
- housing member
- end cap
- axial
- outer housing
- rib
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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
- H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Motor Or Generator Frames (AREA)
Abstract
An electric machine having a stator, a rotor and a housing assembly with two end caps and inner and outer axially extending members. Ribs on one housing member engage the other housing member in an interstitial space and define axially extending fluid path segments. The liquid coolant path may be serpentine. The ribs may have a width greater than the radial thickness of the sleeve portion from which they extend. Fasteners can attach the end caps to the enlarged width ribs. The inner and outer housings are advantageously extrudable. An electronic component can be thermally coupled with an end cap and disposed radially inward and axially proximate a plurality of end turn fluid passages. The electronic component may be at least partially axially positioned between the distal limit of the stator windings and the axial limit of the serpentine path. The end caps may also support bearing assemblies.
Description
This application claims that on May 30th, 2013 submits to, name be called " ELECTRICMACHINEWITHLIQUIDCOOLEDHOUSING (there is the motor of liquid cools housing) ", series number is 13/905, the U.S. Patent application of 787 and on May 30th, 2013 submit to, name be called " ELECTRICMACHINEWITHLIQUIDCOOLEDHOUSINGANDENDCAP (there is the motor of liquid cools housing and end cap) ", series number is 13/905, the priority of the U.S. Patent application of 953, the disclosure of these two sections of documents is incorporated herein by reference.
Technical field
The present invention relates to motor, more specifically, the present invention relates to the motor with housing, this housing is used for cooling motor.
Background technology
Motor comprises stators and rotators, and rotor rotates relative to stator.Motor can be operating as motor, generator or motor/generator, and motor/generator can optionally be operating as motor or generator.When being operating as motor, electric current is input in motor to produce mechanical torque.When being operating as generator, mechanical torque is input in motor with generation current.
In some applications, motor needs to use cooling system to remove heat from motor during operation.During motor operation, produce most heat by stator winding.Therefore, usually expect by directly removing heat from stator winding or cooling stator by removing heat from stator core.From stator core remove heat a kind of universal method be stator is arranged on be commonly referred to " water jacket " housing, its middle shell and stator core directly engage, and housing comprises multiple liquid cooling channel.The circulate coolant of such as water by the passage of housing, to remove heat from housing.Therefore, housing removes heat from stator core, and removes heat from stator winding thus.
The manufacturing cost saving aspect of the shell structure aspect and housing that are still desirably in this motor is improved.
Summary of the invention
The invention provides a kind of motor, it has the housing unit for making circulate coolant, and this housing unit can manufacture in cost-saving mode and assemble.
In one form, the present invention includes motor, this motor comprises stator, and this stator connects with rotor being operable ground, and wherein this stator comprises stator core and multiple winding, and rotor can rotate around rotation.Motor also comprises housing unit, and this housing unit comprises the first end cap and the second end cap and axially extended internal housing member and outer housing member.Stator core to be arranged in axially extended internal housing member and to connect with axially extended internal housing member heat.Axially extended outer housing member arranges around axially extended internal housing member and radially defines void space between the internal housing member extended axially and axially extended outer housing member.Multiple rib radially extends in void space from the housing member of internal housing member and outer housing member, and each rib has distal end, and this distal end engages internal housing member and the relative housing member in outer housing member.Internal housing member is tubular sleeve with the described relative housing member in outer housing member, and this tubular sleeve has the roughly level and smooth wall-like surface towards void space.Multiple rib defines multiple axially extended fluid path section in void space.First end cap with second end cap seal ground dead air space space relative axial end portion, housing unit defines entrance and exit, wherein liquid coolant enters entrance, along the fluid path comprising described multiple axially extended fluid path section, and is discharged by outlet.
In certain embodiments, described multiple rib extends radially outward from internal housing member, and roughly level and smooth wall-like surface is radially towards the cylindrical surface of inner side.
In other embodiments, internal housing member and outer housing member and the first end cap and the second end cap define the spiral-type path for liquid coolant, wherein liquid coolant is along the flowing of contrary axial direction in circumferentially adjacent fluid path section, and the axial direction of fluid flowing is between adjacent section, reverse near the position of the first end cap and the second end cap.
In other embodiments, the inside or the outer housing member that are extended with multiple rib comprise the tubular portion with radial thickness, and at least some in wherein said multiple rib defines the circumferential extension width larger than the radial thickness of tubular portion.In such embodiments, the first end cap and the second end cap can utilize threaded fastener to be fixed, and described threaded fastener extends in hole, and described hole is arranged in the circumferential width rib larger than the radial thickness of tubular portion.
Advantageously, internal housing member and outer housing member have axial length separately and define the roughly uniform cross section of whole axial length along corresponding housing member, and internal housing member and outer housing member are all extrudable thus.
In other embodiments, first end cap defines multiple ends diverter fluid passage, these end diverter fluid passages are circumferentially arranged around the first axial end portion also near stator, its medial end portions diverter fluid passage makes the fluid between adjacent section be communicated with, and wherein this motor also comprises the electronic unit connected with the first end cap heat, and this electronic unit is arranged on the radially inner side of multiple ends diverter fluid passage also vertically near multiple ends diverter fluid passage.In such embodiments, fluid path can limit spiral-type path, wherein the first end cap defines the first axial limit of spiral-type path, this first axial limit exceedes the distally limit of winding vertically at the first axial end portion place, and wherein between this electronic unit distally limit of being at least partially disposed on the winding at the first axial end portion place and the first axial limit of spiral-type path.
In one aspect of the method, the present invention includes motor, this motor comprises stator, and this stator connects with rotor being operable ground, and wherein this stator comprises stator core and multiple winding, and rotor can rotate around rotation.Motor also comprises housing unit, and this housing unit comprises the first end cap and the second end cap and axially extended internal housing member and outer housing member.Stator core to be arranged in axially extended internal housing member and to connect with axially extended internal housing member heat, and axially extended outer housing member is around axially extended internal housing member setting and radially define void space between the internal housing member extended axially and axially extended outer housing member.Multiple rib radially extends in void space from the housing member of internal housing member and outer housing member, and each rib has distal end, and this distal end engages internal housing member and the relative housing member in outer housing member.Multiple rib defines multiple axially extended fluid path section in void space.Internal housing member and outer housing member each define axial length and define the roughly uniform cross section of whole axial length along corresponding housing member, and internal housing member and outer housing member are all extrudable thus.The housing member being extended with multiple rib comprises the tubular portion with radial thickness, and at least some in wherein said multiple rib defines the circumferential extension width larger than the radial thickness of tubular portion.Multiple securing member engages the first end cap and the second end cap, and extends in hole, and described hole is arranged in the circumferential width rib larger than the radial thickness of tubular portion, thus the first end cap and the second end cap is fixed to a described housing member.First end cap with second end cap seal ground dead air space space relative axial end portion, and define entrance and exit, wherein liquid coolant enters entrance, along the helical type fluid path for liquid coolant limited by internal housing member and outer housing member and the first end cap and the second end cap, and discharged by outlet.
The present invention can also provide a kind of motor, and its middle shell makes circulate coolant, and comprises at least one end cap, and this end cap connects or support bearing assembly with electronic unit heat.
In one aspect of the method, the present invention includes motor, this motor comprises stator, and this stator connects with rotor being operable ground, and wherein this stator comprises stator core and multiple stator winding, and rotor can rotate around rotation.At least one axially extended housing member connects with stator core heat, and defines multiple axially extended fluid passage.End cap defines interconnective for axially extended fluid passage multiple ends diverter fluid passage.End diverter fluid passage is circumferentially arranged around the first axial end portion also near stator, and axially extended fluid passage and end turn to passage to define spiral-type path thus.The electronic unit connected with end cap heat is arranged on the radially inner side of multiple ends diverter fluid passage also vertically near multiple ends diverter fluid passage.
In certain embodiments, end cap defines the first axial limit of spiral-type path, and this first axial limit exceedes the distally limit of stator winding vertically at the first axial end portion place.In such embodiments, between the electronic unit distally limit that can be arranged on the stator winding at the first axial end portion place at least in part vertically and the first axial limit of spiral-type path.
Some embodiments can also comprise the second end cap, this second end cap is arranged on the second axial end portion place relative with the first axial end portion of stator, wherein the second end cap engages with axially extended housing member, and multiple axially extended fluid passage defines multiple paired passage.For each composition to passage, second end cap can be constructed such that fluid flowing is rebooted another paired passage from the passage of paired passage by it, and wherein the second end cap defines the second axial limit of spiral-type path, this second axial limit at the second axial end portion place near the second distally limit of stator winding.
In one aspect of the method, the present invention includes motor, this motor comprises stator, and this stator connects with rotor being operable ground, and wherein this stator comprises stator core and multiple stator winding, and rotor is arranged on axle, and its rotor and axle can rotate around rotation.Motor also comprises at least one axially extended housing member, and at least one axially extended housing member described connects with stator core heat, and defines multiple axially extended fluid passage.Axially extended fluid passage is interconnected by least one the heat conduction end cap defining multiple ends diverter fluid passage.Multiple ends diverter fluid passage is circumferentially arranged around the first axial end portion also near stator, and axially extended fluid passage and end turn to passage to define spiral-type path thus.Bearing assembly is arranged on end cap, and rotatably back shaft.
In certain embodiments, motor also comprises the second end cap of heat conduction, and this second end cap is arranged on the second axial end portion place relative with the first axial end portion of stator, and engages with axially extended housing member.Multiple axially extended fluid passage defines multiple paired passage, wherein, for each composition to passage, fluid flowing is rebooted another paired passage from the passage of paired passage by the second end cap, and wherein the second end cap defines the second axial limit of spiral-type path, this second axial limit at the second axial end portion place near the second distally limit of stator winding.Rotatably the second bearing assembly of back shaft can be arranged on the second end cap.
Accompanying drawing explanation
In conjunction with the drawings with reference to the following explanation of the embodiment of the present invention, above and other feature of the present invention and acquisition methods thereof will become more apparent, and can understand invention itself better, wherein:
Fig. 1 is the perspective view of motor.
Fig. 2 is another perspective view of motor.
Fig. 3 is the cross-sectional view of motor.
Fig. 4 is the perspective cross-sectional view of motor.
Fig. 5 is the perspective view of motor, and wherein outer housing member is removed.
Fig. 6 is another perspective view of motor, and wherein outer housing member is removed.
Fig. 7 is the partial side view of motor, and wherein outer housing member is removed.
Fig. 8 is the cross-sectional view of internal housing member and outer housing member.
Fig. 9 is the end view of end cap.
Figure 10 is the end-view of end cap.
Figure 11 is the end-view of alternative end cap.
Figure 12 is the perspective view of alternative internal housing member.
Figure 13 is the cross-sectional view of alternative motor.
Corresponding reference symbol shows the corresponding part running through some views.Although example listed herein shows embodiments of the invention with some forms, following the disclosed embodiments are not detailed or are used for limiting the scope of the present invention to disclosed precise forms.
Embodiment
Motor 20 has been shown in Fig. 1-4, and this motor comprises rotor assembly 22 and stator module 24.In the illustrated embodiment, motor 20 is interior permanent magnets motor/generators.But housing unit disclosed herein may be used for the motor of other type.
Illustrated rotor assembly 22 can rotate around axis 30, and has conventional structure, and this conventional structure has the rotor core 26 formed by the electrical sheet lamination stacked.Rotor core 26 also defines axially extended slit, and permanent magnet 28 is arranged in slit.Rotor core 26 is arranged on armature spindle 32, and this armature spindle is rotatably supported by bearing assembly 34,36.Belt wheel 38 is arranged on an end of axle 32.Belt wheel 38 can engage with the band for transmitting torque, such as, to provide power for the turbine of the booster in vehicle.Although illustrated motor 20 is depicted as have belt wheel 38, alternative embodiment may be used for other application, and can be used as motor, generator or motor/generator.
Sensor cluster 40 for monitoring the rotation of axle 32 is positioned at the end relative with belt wheel 38 of axle 32.Sensor cluster 40 comprises rotating member 42 and static component 44, and can take the form of resolver, hall effect sensor or other appropriate sensor.In the example in the figures, rotating member 42 has the toothed ring of projection ferrous metal, and this tusk defines the discrete target for hall effect sensor 44, can monitor the rotating speed of axle 32 thus.Hall effect sensor and similar transducer is used to be well-known for those of ordinary skills.
Stator module 24 comprises stator core 46, and this stator core is also formed by the electrical sheet lamination stacked.Illustrated stator module 24 has stator core 46, and this stator core defines axially extended and radially to the slit of inner opening.The coil being also usually called as winding 48 to be inserted in the slit of stator core 46 and to have end wire turn, and this end wire turn extends over the axial end portion of stator core 46.In the illustrated embodiment, motor 20 is three phase electric machines.
Well-known for those of ordinary skills routine techniques is utilized to manufacture rotor assembly 22 and stator module 24.Such as, rotor core 26 and stator core 46 are formed by the multiple electrical sheet laminations impressed in progressive die assembly.The lamination forming rotor core 26 and stator core 46 can pass through the protuberance be bonded with each other in welding, adhesive, adjacent laminates and slit and be fixed together, or can be fixed together by other suitable method.Such as, a kind of adhesive means of fixing lamination relates to use two-part epoxy resin, and one of them part is applied to the lower surface of each lamination, and another part is applied to the top surface of each lamination.Once stack, lamination is just heated, and two parts to be attached together, and forms bonding iron core.
After formation stator core 46, utilize conventional coil to insert equipment and winding 48 is inserted in stator core 46.Similarly, after formation rotor core 26, magnet 28 is inserted in the slit of rotor core 26.
Magnet 28 can be magnetized before being arranged in rotor core 26, or can not be magnetized when mounted and be subjected to magnetic properties after be arranged in rotor core 26.Magnet 26 can advantageously be formed by neodymium iron boron.Can dysprosium be comprised when forming magnet 26, to provide larger temperature stability, and allowing magnetic material to resist magnetic force loss better.Other material multiple also can be used for forming magnet 28, comprises rare earth material, such as lithium, terbium and samarium.Use these and other magnetic material to be formed the permanent magnet for motor to be that those of ordinary skill in the art are well-known.Magnet 28 can also be included in outer layer material magnet being formed external skin, such as, by electroplating the nickel dam formed on magnetic material or the aluminium lamination formed by vapor diffusion.Such external skin can be used for strengthening corrosion resistance.
Magnet 28 can by adhesive, by engaging with the press-fit of rotor core 26 or being remained in the axial slots of iron core 26 by other suitable means.Such as, rotor core 26 can be heated, and to make the size thermal expansion of the slit formed in rotor core 26 and rotor core, thus is provided for magnet 28 and is inserted into enough gaps in slit.Magnet 28 also can be frozen, to reduce their size.Then, rotor core 26 and magnet 28 can be returned to ambient temperature, and wherein when iron core 26 and magnet 28 are in identical temperature, the size of rotor core 26 and magnet 28 makes magnet 28 engage securely with rotor core 26 and be fixed in rotor core.
Rotor 22 and stator 24 are arranged in housing unit 50.Housing unit 50 comprises axially extended internal structure 52 around stator module 24 and axially extended external member 54.Internal housing member 52, around also directly engaging stator core 46, connects with stator core 46 heat thus.In the illustrated embodiment, internal housing member 52 has multiple rib 56 that is axially extended, radially projection.Outer housing member 54 around internal structure 52, and engages with the distal end 58 of rib 54.Between internal housing member and outer housing member 52,54, define void space 60, space 60 is subdivided into multiple axially extended fluid path section 62 by rib 56.Below discuss the flowing of cooling agent by housing unit 50 in more detail.
In the illustrated embodiment, outer housing member 54 takes the form of tubular cylinder shape sleeve, has the inner radial surface 64 of substantially level and smooth wall-like and the radially-outer surface 66 of substantially level and smooth wall-like.The cross section of the simplification of outer housing member 54 is convenient to the manufacturing cost saving of housing unit 50, and can allow the tubing using standard-sized, commercially available acquisition in the manufacture of one of inside and outside axially extended housing member in some applications.It should be noted that, although illustrated embodiment adopts the rib 56 extended radially outward from internal housing member 52, but alternative embodiment can adopt such rib 56, this rib is positioned on outer housing member 54, and radially extend internally, to engage the internal housing member 52 having and simplify cross section, such as, there is the tubular sleeve on the inside and outside surface of radial direction of substantially level and smooth wall-like.
Although illustrated embodiment adopts the cylindrical sleeve with the inside and outside surface of level and smooth wall-like as one of housing member, also alternative tubular sleeve can be adopted.Such as, outer housing member 54 can be provided with radiating fin at it on outer surface, to promote to dissipate the heat in surrounding environment, or can have from its outward extending mounting ears with by means of bolt or other securing member fixed electrical machinery 20 or the further feature that has the outer surface being formed in housing member 54.It is also noted that, although housing member 54 is cylindrical surfaces of smooth wall-like towards interior surface 64 in the illustrated embodiment, its symmetry facilitates the efficiency manufacturing and assemble, but also can adopt other shape and structure, precondition is that the shape of relative housing member 52 and/or rib 56 is modified with structure, as required to provide the engage of housing member 52,54.
End cap 68,70 is positioned at the opposed end place of housing member 52,54, and is sealed shut the end to axial of void space.In the illustrated embodiment, end cap 70 defines entrance 72 and outlet 74, wherein cooling agent (such as water or the antifreeze coolant based on water) is entered by entrance 72, then flow along fluid path 76, this fluid path comprises multiple axially extended fluid passage 62, and these fluid passages form the axially extended fluid path section of larger fluid path 76.The axial end portion place being flowing in each fluid path section 62 is reverse, and enter circumferentially adjacent section, to flow along contrary direction, fluid path 76 defines the spiral-type path for liquid coolant before liquid coolant is discharged by outlet 74 thus.Pipeline 73,75 respectively with entrance 72 with export 74 and be communicated with, and to stretch out, so that entrance 72 and outlet 74 are connected to external coolant pipeline.
In the embodiment shown in Fig. 1-7, inside and outside housing member 52,54 has substantially the same axial length 53, and each rib in multiple rib 56 has axial Extendible Extent 55, this axial Extendible Extent is substantially the same with the axial length 53 of outer housing member 52,54 with internal housing member.In this structure with total length rib 56, the reverse of fluid flowing occurs in the fluid passage 78 limited by end cap 68,70, and wherein fluid is delivered to circumferentially adjacent section 62 from an axially extended fluid path section 62 by each fluid passage 78.Thus, the adjacent flow channels of axially extended fluid passage 62 is connected with each other by these end diverter fluid passages 78.
Alternatively, the end sections of at least some rib 56a is removed by machine work, thus defines axial Extendible Extent 57, and this axial Extendible Extent is less than the axial length 53 of internal housing member and outer housing member 52,54.Like this, the rib 56a of shortening defines path 78a, and this path makes the cooling agent between adjacent fluid path section 62 be communicated with, as to understand with reference to Figure 12.When adopting permission cooling agent to be flowing in rib 56a reverse in the axial limit of internal housing member and outer housing member 52,54, the end cap 68a located near path 78a can have roughly plane surface, this surface engages the axial end portion of internal housing member and outer housing member 52,54, reduces the machine work manufactured needed for end cap 68a thus.
In the embodiment with total length rib 56 and in the embodiment of rib 56a with shortening, fluid path 76 defines the spiral-type path for liquid coolant, wherein cooling agent is along the flowing of contrary axial direction in circumferentially adjacent fluid path section 62, and the axial direction of fluid flowing is reverse in the position near end cap 68,70 between adjacent section 62.In other words, fluid path section 62 defines multiple paired passage 63, wherein forms passage 63 for each, and fluid flowing is rebooted another passage 63b in paired passage by end cap 68 or 70 from the passage 63a of paired passage.In this regard, it should be noted that, at an axial end portion place, special modality (such as, 63a) is by paired with the adjacent passage (such as, 63b) in a peripheral side of this special modality, at another axial end portion place, this special modality, by paired with the adjacent passage (such as, 63c) in another peripheral side of this special modality, thus defines spiral-type path.
It is also noted that, although illustrated embodiment adopts flow direction to change nyctitropic flow path at each independent passage place, but alternative embodiment can adopt such flow path, wherein two or more adjacent flow channels as single passage and the fluid had along equidirectional flow.Then, the flowing of this fluid is by oppositely and be communicated to similar adjacent flow channels in groups, and these adjacent flow channels provide the flowing of fluid in opposite direction.
The otch of the end of rib 56a can be positioned on two axial end portions of multiple rib, or is only positioned on an axial end portion.Such as, if all ribs all have the otch defining path 78a, so a rib will have otch an end, and two ribs on its either side will have otch on opposed end, otch is alternately arranged from an axial end portion to another axial end portion, limits helical type path thus.If otch is only positioned at an axial end portion place, so total length will be had every a rib.Such as, maybe advantageously, an end cap defines path 78 and entrance 72 and exports 74, and relative end cap has plane surface 80.In such embodiments, rib by defining path 78 at end cap, the end of entrance 72 and outlet 74 extends to the axial limit of housing member 52,54, and the end cap with plane surface 80 will be positioned at the end to axial of housing member 52,54, the path 78a limited by the otch in rib 56a is positioned at this end to axial.
The active surface region directly contacted with the cooling agent flowing through housing unit 50 that path 78 in end cap 68,70 defines end cap 68,70, and thus heat energy is delivered to cooling agent from end cap 68,70 by the mode that heat energy is delivered to the mode of cooling agent similar from stator module 24 with internal housing member 52.This allows end cap 68,70 to contribute to cooling the other parts of stator module 24 and/or cooling motor 20, as discussed in more detail below.Although end cap 68a and its substantially flat surface 80 do not provide the surf zone equally large with path 78, but be subject to the impact of the fluid flowing in path 78a, and with this directly contact of cooling agent, the quality of end cap 68a and the cooling agent flowing through housing unit 50 linked up with the mode heat similar with path 78.Usually advantageously, be oriented to by plane surface 80 relative to axis 30 degree in a vertical angle, as shown in figure 13, to simplify the manufacture of housing unit 50, but the orientation on surface 80 can change, if such change is conducive to the application-specific of motor 20.Another amendment that may be used for the path 78 in end cap 68,70 is in the surface of path 78, use projection or other irregular structure, to be provided for the surf zone of the increase of heat trnasfer or to produce turbulent flow in fluid flowing.
Circulate coolant through housing unit 50 passes through coolant system (not shown), this coolant system comprises for removing the device of heat (such as from cooling agent, radiator or similar heat-exchange device), and advantageously comprise for making circulate coolant by the pump of housing 50 or similar device.Therefore, at cooling agent by outlet 74 from after housing unit is discharged, and before cooling agent turns back to housing unit 50 by entrance 72, be removed through the heat being delivered to cooling agent during housing unit 50 at cooling agent.It is also noted that housing unit 50 can be a part for larger and more complicated cooling system, this cooling system makes circulate coolant by multiple device needing to remove heat.Using such coolant system, such as, have the coolant system had in the vehicle of internal combustion engine, is well-known for those of ordinary skills.
Internal housing member and outer housing member 52,54 can be made of a variety of materials.Internal housing member 52 needs by the material that heat is delivered to cooling agent from stator module 24 can being formed, and usually advantageously forms outer housing member 54 by same or analogous material, and thus, housing member 52,54 all has identical thermal coefficient of expansion.In the illustrated embodiment, internal housing member and outer housing member 52,54 are formed by aluminum.When expecting to make the minimize weight of motor 20, such as, when during motor 20 is for vehicle, it is favourable for using aluminium to form housing member 52,54.But other metal material also can be used for forming housing member 52,54, and other metal material may be favourable when undesirably making the minimize weight of motor 20.
In the illustrated embodiment, the structure of internal housing member and outer housing member 52,54 is convenient to save manufacturing cost.More specifically, the cross section vertical with axis 30 of each housing member 52,54 is uniform along the whole axial length 53 of housing member 52,54 substantially, and housing member 52,54 all can utilize expressing technique manufacture thus.After housing member 52,54 is cut into pieces, may need to carry out certain machine work, but machine work so in case of need will be that degree is less.Such as, screwed hole and circular groove can be formed with in the axial end surface of housing member 52,54, with the sealing of the attachment and O shape ring or other containment member that provide end cap 66,68, thus the connecting portion between seal casinghousing component 52,54 and end cap 66,68.In the embodiment adopting the rib 56a shortened, remove the end of rib 56a to form path 78a by also needing by machine work or other suitable means.A small amount of extra machine work also may be expect, such as, form attachment location for housing unit 50 being fixed to vehicle frame or being used for internal housing member 52 to aim at stator module 24, or form other supplemental characteristic structure in housing unit 50.Also possibly, outer housing member 54 is machined as and forms entrance 72 and outlet 74, instead of on one of end cap, form these feature structures.
In the illustrated embodiment, form end cap 68,70 by cast aluminium material, but other suitable means and material also can be used for forming end cap 68,70.As mentioned above, O shape ring or other containment member 82 can be used to provide the sealing between end cap 68,70 and housing member 52,54, wherein two O shape rings 82 on each axial end portion.Like this, in each end, the radially inner side of the void space 60 of an O shape loop mapping between internal housing member 52 and end cap, the radial outside of the void space 60 of an O shape loop mapping between internal housing member 52 and end cap.In other words, O shape ring 82 is arranged on each axial end portion place of each housing member in internal housing member and outer housing member 52,54, and is arranged on internal housing member and between outer housing member 52,54 and end cap 52,54.Although illustrated embodiment adopts O shape ring to provide sealing, alternatively, the containment member of other type, such as packing ring or fluid sealant, can be used as containment member 82.
End cap 68,70 can utilize threaded fastener 84 or other suitable means to be attached.In the illustrated embodiment, end cap 68,70 has axially extended hole 85, and securing member 84 is inserted through this hole.The screwed hole 86 be positioned in one or two axially extended housing member 52,54 is engaged by securing member 84, thus end cap 68,70 is fixed to housing member 52,54.By using wider rib 56, screwed hole 86 can be advantageously disposed in rib 56.In the illustrated embodiment, housing member 52 has tubular portion 88, and this tubular portion defines radial thickness 90, and rib 56 defines the width 92 that the circumference larger than radial thickness 90 extends.In the illustrated embodiment, each rib 56 only has a screwed hole 86 an end, adjacent rib 56 has hole 86 in relative end, end cap 68 is attached every a rib 56 thus, and end cap 70 is also attached every a rib 56, each rib 56 utilizes threaded fastener to be only attached to an end cap.Also likely in single embodiment, adopt thin rib and thick rib, wherein only thick rib has the screwed hole of the attachment for end cap.
The screwed hole 86 be positioned in rib 56 is used to allow threaded fastener to be positioned adjacent to the radial midpoint of void space 60.This allows end cap to engage internal housing member and outer housing member 52,54 with substantially suitable with the power of the sensing axial direction of balance, thus is convenient to the sealed engagement of end cap 68,70 and housing member 52,54 in the whole length of life of motor 20.Also allow the size of the tubular portion of each housing member 52,54 to be formed according to the consideration of stuctures and properties aspect, this consideration has the necessity of screwed hole not included in tubular portion.For many application, the radial thickness had when this can allow the radial thickness of tubular portion to be positioned in the tubular portion of axially extended housing member than screwed hole 86 is little.To extend internally instead of from the outward extending embodiment of internal housing member 52 it is also noted that this structure defining the rib of the expansion of screwed hole can also be used for rib from outer housing member 54.
It is also noted that do not adopt tapped blind hole in rib 56, hole 86 can be not threaded, and the whole axial length of extending rib 56.In such embodiments, long bolt can extend through end cap on one end, through rib 56, and through relative end cap, for being fixed.In such embodiments, will the homogeneous compaction of containment member be facilitated, and will the quantity of securing member be reduced.In addition, in so alternative embodiment, the hole in rib 56 can be extruded, instead of the screwed hole that machine work is formed in rib 56.For the whole length of hole extending rib 56 stay bolt embodiment and in rib 56, adopt blind hole embodiment for, securing member will engage end cap 68,70 and extend to the hole being arranged in rib 56.
As mentioned above, axle 32 rotates around axis 30 together with rotor assembly 22, and is rotatably supported by bearing assembly 34,36.Bearing assembly 34,36 is arranged in the hub 35,37 be formed on end cap 68,70.Therefore, end cap 68,70 is used as the radiating fin of bearing assembly 34,36.In addition, because end cap connects with the cooling agent heat cycling through housing unit 50, cooling agent will remove waste heat from end cap 68,70.Thus, end cap 68,70 can remove heat from bearing assembly 34,36.Although remove heat from bearing assembly 34,36 may be restricted, in some applications, can allow to use little by little less bearing, and more save the manufacturing cost of motor 20 thus.
The more significant miscellaneous function of end cap 70 is cooling electronic components 94.In the illustrated embodiment, electronic unit 94 comprises printed circuit board (PCB) and inverter, this printed circuit board (PCB) has the control circuit of the operation for controlling motor 20, and it is AC electric current that this inverter is used for the DC current conversion from Vehicular battery, to power for motor 20.But alternative embodiment can adopt different electronic units or comprise other electronic unit.Such as, motor 20 can also be used as generator, and is provided with rectifier, and the AC current conversion that this rectifier is used for motor to generate is DC electric current, to be battery charging.
Electronic unit 94 is connected with end cap 70 heat by the installing component 94 on such as end cap 70, by the radiating fin allowing end cap 70 to be used as electronic unit 94.In addition, end cap 70 connects with the cooling agent heat cycling through housing unit 50, will remove heat from end cap 70, and cooling electronic components 94 on one's own initiative thus.End cap 70 is used as radiating fin and this layout of cooling electronic components 94 can conveniently in the operating condition of the whole wide region of motor 20 be safeguarded electronic unit 94 in the temperature range of allowing on one's own initiative.
Electronic unit 94 end be advantageously positioned at defined in end cap 70 turn to passage 78 radially inner side and axially near.It should be noted that stator winding 48 extends axially beyond stator core 46, and the outermost part of winding defines the distally limit 96,98 in the end to axial of motor.Similarly, spiral-type path 76 defines relative two axial limits 100,102 of helical type fluid path.The distally limit 96,98 making the axial limit 100,102 of spiral-type path 76 extend beyond stator winding 48 does not provide any significant contribution to the cooling of stator module 24 usually.Therefore, usually advantageously, end cap be positioned at there is no electronic unit 94 axial end portion on, to limit the distally limit 98 of axial limit 102 near stator winding 48 of spiral-type path 76.Only when make spiral-type path 76 extend beyond the distally limit 98 for except cooling stator module 24 except certain object, the distally limit that spiral-type path extends beyond stator winding 48 just likely provides advantage.
Axial end portion residing for the electronic unit 94 of motor 20 (namely, end cap 70 in the illustrated embodiment) place, end cap configuration is become to make the axial limit 100 of spiral-type path 76 locate the cooling that the distally limit 96 exceeding stator winding 48 can provide the cooling of electronic unit 94 or some feature structure except stator module 24 of motor 20 vertically.Such as, as illustrated embodiment exemplarily illustrates, electronic unit 94 can advantageously be positioned between the distally limit 96 of stator winding 48 and the axial limit 100 of spiral-type path 76 vertically completely or at least in part, so that heat is delivered to end cap 70 effectively from electronic unit 94.
It is also noted that the one or more distally limit 96,98 making spiral-type path 76 extend beyond stator winding 48 can also be used for the object except a part for cooling motor 20.Such as, such axis extension of spiral-type path 76 can be used for removing heat from cooling agent.In so alternative embodiment, end cap can comprise fin, and heat is dissipated to surrounding environment from cooling agent by this fin, to remove heat from cooling agent.
In the illustrated embodiment, overlay 104 is positioned on the axial end portion of end cap 70, and provides the protection to electronic unit 94 and sensor cluster 40.Overlay 104 utilizes securing member 84 to be fixed, and this securing member is used for end cap 70 to be attached to rib 56.Central opening in overlay 104 aligns with grommet 106, and allows wire rod (not shown) to enter.This wire rod delivered current to power to motor 20, and is used for transmitting sensing data and control signal between sensor cluster 40, electronic unit 94 and peripheral control unit (electronic control unit (" ECU ") of such as vehicle).
Although by the present invention exemplarily property design be described, can also modify to the present invention in spirit and scope of the present disclosure.Therefore the application is intended to contain any modification pattern, purposes or the adaptive version that adopt its general principles.
Claims (24)
1. a motor, it comprises:
Stator, this stator connects with rotor being operable ground, and wherein this stator comprises stator core and multiple winding, and rotor can rotate around rotation;
Housing unit, this housing unit comprises the first end cap and the second end cap and axially extended internal housing member and outer housing member, wherein:
Stator core to be arranged in axially extended internal housing member and to connect with axially extended internal housing member heat, and axially extended outer housing member is around axially extended internal housing member setting and radially define void space between the internal housing member extended axially and axially extended outer housing member;
Multiple rib, described multiple rib radially extends in void space from the housing member of internal housing member and outer housing member, each rib has distal end, this distal end engages internal housing member and the relative housing member in outer housing member, internal housing member is tubular sleeve with the described relative housing member in outer housing member, and this tubular sleeve has the roughly level and smooth wall-like surface towards void space; Described multiple rib defines multiple axially extended fluid path section in void space; And
Wherein the first end cap with second end cap seal ground dead air space space relative axial end portion, housing unit defines entrance and exit, wherein liquid coolant enters entrance, along the fluid path comprising described multiple axially extended fluid path section, and is discharged by outlet.
2. motor according to claim 1, wherein said multiple rib extends radially outward from internal housing member, and roughly level and smooth wall-like surface is radially towards the cylindrical surface of inner side.
3. motor according to claim 1, wherein internal housing member and outer housing member and the first end cap and the second end cap define the spiral-type path for liquid coolant, wherein flow along contrary axial direction in the circumferentially adjacent fluid path section of liquid coolant in fluid path section, the axial direction of fluid flowing is between adjacent section, reverse near the position of the first end cap and the second end cap.
4. motor according to claim 3, wherein internal housing member and outer housing member have roughly the same axial length, and each rib in wherein said multiple rib has the axial Extendible Extent roughly the same with the axial length of internal housing member and outer housing member.
5. motor according to claim 4, each wherein in the first end cap and the second end cap defines multiple fluid passage, and these fluid passages make the fluid between adjacent section be communicated with.
6. motor according to claim 3, wherein internal housing member and outer housing member have roughly the same axial length, at least some in multiple rib is shortened and has the axial Extendible Extent less than the axial length of internal housing member and outer housing member, and the rib of shortening defines the path that the fluid between adjacent section is communicated with.
7. motor according to claim 6, at least one wherein in the first end cap and the second end cap defines roughly plane surface, and this plane surface can engage with internal housing member and outer housing member near the path limited by the rib shortened.
8. motor according to claim 1, wherein internal housing member and outer housing member have axial length separately and define the roughly uniform cross section of whole axial length along corresponding housing member, and internal housing member and outer housing member are all extrudable thus.
9. motor according to claim 8, wherein internal housing member and the described relative housing member in outer housing member are the sleeves of substantial cylindrical.
10. motor according to claim 8, it also comprises four containment members, each axial end portion place of each housing member wherein in internal housing member and outer housing member is provided with a containment member, and each containment member engages hermetically with one of the first end cap and the second end cap and one of internal housing member and outer housing member and is arranged on one of the first end cap and the second end cap and between one of internal housing member and outer housing member.
11. motors according to claim 1, the housing member be wherein extended with in the internal housing member of multiple rib and outer housing member comprises the tubular portion with radial thickness, and at least some in wherein said multiple rib defines the circumferential extension width larger than the radial thickness of tubular portion.
12. motors according to claim 11, wherein the first end cap and the second end cap utilize threaded fastener to be fixed, and described threaded fastener extends in hole, and described hole is arranged in the circumferential width rib larger than the radial thickness of tubular portion.
13. motors according to claim 1, wherein the first end cap defines multiple ends diverter fluid passage, these end diverter fluid passages are circumferentially arranged around the first axial end portion also near stator, end diverter fluid passage makes the fluid between adjacent section be communicated with, and wherein this motor also comprises the electronic unit connected with the first end cap heat, and this electronic unit is arranged on the radially inner side of multiple ends diverter fluid passage also vertically near multiple ends diverter fluid passage.
14. motors according to claim 13, wherein fluid path defines spiral-type path, first end cap defines the first axial limit of spiral-type path, this first axial limit exceedes the distally limit of winding vertically at the first axial end portion place, and wherein between this electronic unit distally limit of being at least partially disposed on the winding at the first axial end portion place and the first axial limit of spiral-type path.
15. 1 kinds of motors, it comprises:
Stator, this stator connects with rotor being operable ground, and wherein this stator comprises stator core and multiple winding, and rotor can rotate around rotation;
Housing unit, this housing unit comprises the first end cap and the second end cap and axially extended internal housing member and outer housing member, wherein:
Stator core to be arranged in axially extended internal housing member and to connect with axially extended internal housing member heat, and axially extended outer housing member is around axially extended internal housing member setting and radially define void space between the internal housing member extended axially and axially extended outer housing member;
Multiple rib, described multiple rib radially extends in void space from the housing member of internal housing member and outer housing member, each rib has distal end, and this distal end engages internal housing member and the relative housing member in outer housing member; Described multiple rib defines multiple axially extended fluid path section in void space; And wherein internal housing member and outer housing member is each defines axial length and define the roughly uniform cross section of whole axial length along corresponding housing member, internal housing member and outer housing member are all extrudable thus;
A housing member comprises the tubular portion with radial thickness, and at least some in wherein said multiple rib defines the circumferential extension width larger than the radial thickness of tubular portion; And
Multiple securing member, described multiple securing member engages the first end cap and the second end cap and extends to the hole being arranged in the circumferential width rib larger than the radial thickness of tubular portion, thus the first end cap and the second end cap are fixed to a housing member, wherein the first end cap with second end cap seal ground dead air space space relative axial end portion, and define entrance and exit, wherein liquid coolant enters entrance, along the helical type fluid path for liquid coolant limited by internal housing member and outer housing member and the first end cap and the second end cap, and discharged by outlet.
16. motors according to claim 15, the hole being wherein arranged in rib is screwed hole, and described screwed hole engages with described multiple fastener threads.
17. motors according to claim 15, wherein internal housing member and outer housing member and the first end cap and the second end cap define the spiral-type path for liquid coolant, wherein liquid coolant is along the flowing of contrary axial direction in circumferentially adjacent fluid path section, and the axial direction of fluid flowing is between adjacent section, reverse near the position of the first end cap and the second end cap.
18. motors according to claim 17, wherein internal housing member and outer housing member have roughly the same axial length, and wherein said multiple rib has the axial Extendible Extent roughly the same with the axial length of the first housing member and the second housing member, and each wherein in the first end cap and the second end cap defines multiple fluid passage, and these fluid passages make the fluid between adjacent section be communicated with.
19. motors according to claim 18, wherein internal housing member and outer housing member have roughly the same axial length, at least some in multiple rib is shortened and has the axial Extendible Extent less than the axial length of internal housing member and outer housing member, the rib shortened defines the path that the fluid between adjacent section is communicated with, and at least one wherein in the first end cap and the second end cap defines roughly plane surface, and this plane surface can engage with internal housing member and outer housing member near the path limited by the rib shortened.
20. motors according to claim 15, its rotor is arranged on axle, and rotor rotates around rotation together with axle; This motor also comprises and axle is rotatably supported on clutch shaft bearing assembly on the end to axial of rotor and the second bearing assembly, and wherein clutch shaft bearing assembly is arranged on first end and covers, and the second bearing assembly is arranged on the second end cap.
21. motors according to claim 15, wherein said multiple rib extends radially outward from internal housing member, outer housing member is the sleeve of tubular cylinder shape, and this sleeve has radially towards the roughly level and smooth wall-like surface of inner side with radially towards the roughly level and smooth wall-like surface in outside.
22. motors according to claim 15, it also comprises four containment members, each axial end portion place of each housing member wherein in the first housing member and the second housing member is provided with a containment member, and each containment member engages hermetically with one of the first end cap and the second end cap and one of internal housing member and outer housing member and is arranged on one of the first end cap and the second end cap and between one of internal housing member and outer housing member.
23. motors according to claim 15, wherein the first end cap defines multiple ends diverter fluid passage, these end diverter fluid passages are circumferentially arranged around the first axial end portion also near stator, end diverter fluid passage makes the fluid between adjacent section be communicated with, and wherein this motor also comprises the electronic unit connected with the first end cap heat, and this electronic unit is arranged on the radially inner side of multiple ends diverter fluid passage also vertically near multiple ends diverter fluid passage.
24. motors according to claim 23, wherein the first end cap defines the first axial limit of spiral-type path, this first axial limit exceedes the distally limit of winding vertically at the first axial end portion place, and wherein between this electronic unit distally limit of being at least partially disposed on the winding at the first axial end portion place and the first axial limit of spiral-type path.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/905,787 US9356492B2 (en) | 2013-05-30 | 2013-05-30 | Electric machine with liquid cooled housing |
| US13/905,953 | 2013-05-30 | ||
| US13/905,787 | 2013-05-30 | ||
| US13/905,953 US20140354090A1 (en) | 2013-05-30 | 2013-05-30 | Electric machine with liquid cooled housing and end cap |
| PCT/US2014/039978 WO2014194060A1 (en) | 2013-05-30 | 2014-05-29 | Electric machine with liquid cooled housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105264752A true CN105264752A (en) | 2016-01-20 |
| CN105264752B CN105264752B (en) | 2018-01-26 |
Family
ID=51989388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480030720.0A Active CN105264752B (en) | 2013-05-30 | 2014-05-29 | motor with liquid cooling housing |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR20160014055A (en) |
| CN (1) | CN105264752B (en) |
| DE (1) | DE112014002106T5 (en) |
| WO (1) | WO2014194060A1 (en) |
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| CN110299786A (en) * | 2018-03-22 | 2019-10-01 | 大众汽车有限公司 | Shell for motor |
| TWI714408B (en) * | 2019-12-27 | 2020-12-21 | 威剛科技股份有限公司 | Inner rotor and a motor |
| CN112448524A (en) * | 2019-08-31 | 2021-03-05 | 比亚迪股份有限公司 | Motor and vehicle |
| CN112470374A (en) * | 2018-07-31 | 2021-03-09 | 赛峰集团 | Multiphase electric machine with integrated power electronics and integrated coolant circuit |
| CN112544028A (en) * | 2018-08-08 | 2021-03-23 | 舍弗勒技术股份两合公司 | Hybrid module including rotor having coolant flow channel |
| CN112703664A (en) * | 2018-09-13 | 2021-04-23 | 马勒国际有限公司 | Electric machine, in particular for a vehicle |
| WO2021129599A1 (en) * | 2019-12-24 | 2021-07-01 | 长城汽车股份有限公司 | Motor cooling structure, drive assembly, and vehicle |
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| CN113972777A (en) * | 2020-07-23 | 2022-01-25 | 通用电气航空系统有限责任公司 | Device and method for cooling an electric machine |
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| US9356492B2 (en) | 2013-05-30 | 2016-05-31 | Remy Technologies, Llc | Electric machine with liquid cooled housing |
| GB2535975A (en) * | 2015-02-02 | 2016-09-07 | Green Motorsport Ltd | Motor |
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| KR102359705B1 (en) * | 2016-07-20 | 2022-02-08 | 엘지마그나 이파워트레인 주식회사 | Case for electric motor |
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| TWI714408B (en) * | 2019-12-27 | 2020-12-21 | 威剛科技股份有限公司 | Inner rotor and a motor |
| US11611259B2 (en) | 2020-03-05 | 2023-03-21 | Dana Belgium N.V. | Systems for a cooling jacket in an electric motor |
| TWI737288B (en) * | 2020-05-05 | 2021-08-21 | 財團法人工業技術研究院 | Integrated motor driving controller |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20160014055A (en) | 2016-02-05 |
| CN105264752B (en) | 2018-01-26 |
| WO2014194060A1 (en) | 2014-12-04 |
| DE112014002106T5 (en) | 2016-01-14 |
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