巴西专利BR112014000619B1 rotating electrical machine and related assembly method

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专利摘要:
Rotating electrical machine and related assembly method. A rotating machine comprising an electronic module (8) is described, comprising a printed circuit (28), a plurality of electronic components of power (67) and signal (68) positioned on the side of the components (8a) of the printed circuit ( 28), and a plurality of conductive tracks (30) positioned on the side of the weld (40) opposite the side of the components (8a) of the printed circuit (28), which implement direct electrical connections between the electronic components of power (67) ; the electronic components of power (67) and the signal ones (68) are in contact, through a filler paste, with the cover of the electric machine, to allow an excellent dispersion of the heat generated by them, the contact being guaranteed by elements rubber bands (44) that press on a support (41) in which the electronics module (8) is housed.
公开号:BR112014000619B1
申请号:R112014000619-9
申请日:2012-07-10
公开日:2020-11-10
发明作者:Pietro De Filippis
申请人:Spal Automotive S.R.L；
IPC主号:

专利说明:

TECHNICAL FIELD
[0001] This invention relates to a rotating electrical machine and its construction or assembly, with particular reference to an integrated electronic control module. This invention relates to a rotating electrical machine and its construction or assembly, with particular reference to an integrated electronic control module. BACKGROUND OF THE INVENTION
[0002] In general, a rotating electrical machine comprises a housing having internally a stator, rigidly connected to the housing, and a rotor with, for example, permanent magnets, connected rotatively.
[0003] An electronic module, or electronic control module, connected to the stator, comprises a plurality of active and passive electronic components that form a power section, and a plurality of electronic signal components that form a control section.
[0004] The electric machines referred to in this description are of the closed type, especially the so-called "sealed" type machines, that is, sealed electric machines, with the respective electronic control module inside. The housing and a lid form a closed container from which exit terminals provided for the power supply of the electronic control system.
[0005] A prior-art rotating electrical machine equipped with an internal electronic control module is described in patent application W02009 / 066248 in the name of the same Applicant. In the solution of this request, the electronic module comprises a plurality of copper conductive tracks on which the electronic power components are mounted, and a printed circuit in which only the signal components are mounted, welded to the conductive tracks.
[0006] The conductive tracks or tracks are "embedded" by overmoulding on a support element made of plastic material.
[0007] The electronic module is cooled by placing the conductive tracks in contact with a dissipating element formed by the motor cover, using "pads" with high thermal conductivity.
[0008] The reliability limit of this solution is due to the possibility of occurrence, in the presence of more or less sudden temperature variations, of breaks in the welds between the printed circuit and the conductive tracks, due to the difference between the coefficients of thermal expansion of the printed circuit and the plastic material in which the conductive tracks mentioned above are "embedded".
[0009] Another prior art solution is shown schematically in figure 1, and refers to a rotating electrical machine 100 comprising an electronic circuit 101 having all the power components 102 positioned on the same side as the printed circuit 103. Some printed circuit tracks 103 implement direct connections between power components 102. In this case, the heat generated by power components 102 is dissipated by placing a heatsink 104 in contact with the side of the printed circuit opposite the one where the components of power 102 are located through the interposition of an electrical insulation layer 105.
[0010] This solution also presents a limit in terms of reliability, since the heat generated by the power components 102, passing through the printed circuit 103, can negatively affect the condition of both the printed circuit and the connections of the power components 102 . DESCRIPTION OF THE INVENTION
[0011] In this context, the main technical objective of the present invention is to provide a rotating electrical machine with the integrated electronic module, free from the above mentioned disadvantages.
[0012] A first objective of this invention is to provide a reliable rotating electrical machine in which the condition of the electronic module is preserved during the operation of the machine.
[0013] Another objective is to provide a rotating electric machine that effectively disperses the heat generated inside, especially the heat produced by the electronic control module.
[0014] The technical purpose and the specified objectives are substantially achieved by an electric machine that comprises the characteristics described in independent claim 1; the present invention also relates to a method of construction of a rotating electrical machine with the assembly steps described in independent claim 5. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Other characteristics and advantages of this invention will be more evident from the description, below, of a preferred form of non-limiting incorporation of a rotating electric machine as illustrated in the attached drawings, in which: - Figure 1 shows an example of an electronic circuit according to the state of the art in which the present invention is applied; Figure 2 shows a schematic perspective view of a rotating electrical machine according to this invention; - Figure 3 shows a schematic view and an exploded view of the rotating electric machine in figure 2, with some parts omitted to better illustrate others; - Figure 4 shows a schematic perspective view and an exploded view of the electronic control module of the machine of figure 3; - Figure 5 shows a second schematic perspective view of the electronic control module in figure 4, with some parts omitted; - Figure 6 shows a third schematic perspective view of the electronic control module of figures 4 and 5; - Figure 7 shows an enlarged view in schematic perspective of the cover of the machine of figure 3; - Figure 8 is a schematic sectional view of the machine in Figure 2, with some parts omitted for clarity; - Figure 9 is an enlarged schematic sectional view of a detail of the machine in figure 2, with some parts omitted to better illustrate others. DESCRIPTION OF THE PREFERRED FORMS OF INCORPORATION OF THE INVENTION
[0016] With reference to figures 2 and 3, the numeral 1 indicates an electric rotating machine according to this invention.
[0017] Machine 1, in the preferred form of incorporation, is an electric motor of the "sealed" type, that is, without any opening for access to its interior, to which express reference will be made below, but without limiting the scope of invention.
[0018] Electric machine 1 will be described in detail only for the parts necessary for understanding the present invention.
[0019] The machine 1 comprises a housing 2 and a lid 3 to close the housing 2, to form, with the housing 2, a closed box or container 4.
[0020] The electric machine 1 further comprises a stator 5 fixed to the housing 2, comprising an electrical winding 6 having terminals 9, and a rotor 7 inserted in the container 4, fixed to the container in a rotating manner about an axis of rotation R.
[0021] Stator 6 is described in patent EP 2215705, which is referred to here in its entirety for the purpose of providing a complete description.
[0022] As illustrated in figure 3, the electrical machine 1 comprises an electronic module 8, inserted at least partially in the housing 2, to supply the electrical winding 6.
[0023] The electric machine 1 also has a heatsink 3 to dissipate the heat generated inside the container 4, in particular by the electronic module 8.
[0024] In the illustrated embodiment, the heatsink is preferably formed by the cover 3 which closes the housing 2.
[0025] The electronic module 8 comprises a plurality of electronic components 10, such as the motor supply MOSFETs 12a, the capacitors 11a, the filter inductor 11b, the shunt (shunt) 64, the MOSFET exciter 65 and the microcontroller 66.
[0026] Among the electronic components 10 there are electronic components of power 67 and electronic components of signal 68.
[0027] The electronic components of power 67 comprise MOSFETs 12a for motor 1, capacitors 11a, filter inductor 11b, and branch 64.
[0028] The electronic signal components 68 comprise the microcontroller 66 and the MOSFET exciter 65.
[0029] MOSFETs 12a, microcontroller 66, shunt 64 and MOSFET exciter 65 are electronic components 12 of the "SMD" type, that is, "Surface Mounting Devices".
[0030] Components 11, that is, capacitors 11a and inductor 11b, are electronic components of the type "PTH", that is, "Pin Through Hole" (with "Pins Passing Through Holes").
[0031] MOSFETs 12a and derivation 64 are therefore the "SMD" type electronic power components.
[0032] The MOSFET exciter 65 and the microcontroller 66 constitute the "SMD" type electronic signal components.
[0033] In an alternative form of embodiment not illustrated, inductor 11b is also an electronic component of the type "SMD".
[0034] As illustrated in figure 5, MOSFETs 12a are electronic components having a housing 13 with a substantially parallelepiped shape, equipped with connection terminals 14.
[0035] Capacitor 11, illustrated as an example, has a substantially cylindrical shape and has respective connection terminals 15.
[0036] Inductor 11, illustrated as an example, has a substantially cylindrical shape with a spiral shape, having respective connection terminals 16.
[0037] As shown in figure 3, the electronic components 10 are facing the cover 3.
[0038] The conventional electronic components 12 of the "SMD" type and the electronic components 11 of the "PTH" type are positioned on a first side or side of the components 8a of the electronic module 8, so that they face the cover 3.
[0039] The heat generated by components 12 of type "SMD" and components 11 of type "PTH" of electronic module 8 is effectively dissipated by cover 3, since they are all facing it.
[0040] In order to maximize the heat exchange, a thermally conductive paste 22, for example, of the type known as "thermally conductive gap filler", is interposed between the electronic components mentioned above and the cover 3 which, as mentioned , acts as a sink.
[0041] With particular reference to figure 7, the inner surface 18 of the cap 3 has a first portion 19 that forms a concave seat whose shape loosely engages the outer, substantially cylindrical surface of the two capacitors 11a.
[0042] The second portion 20 forms a second concave seat whose shape is loosely coupled to the substantially cylindrical outer surface of inductor 11b.
[0043] To optimize the "thermal" contact between the cover 3, which - as mentioned above - acts as a heatsink, and the electronic components 12 of the "SMD" type mounted on the component side 8a of the printed circuit 28, the cover 3 has at least one contact element 21, formed by a third substantially flat portion of the inner surface 18 of the lid 3.
[0044] The interposition of the terribly conductive "filler paste" 22 maximizes the heat transfer between the "SMD" type components mounted on the component side 8a of the printed circuit 28 and the cover 3, and between the "PTH" type components and the cover 3, since all the empty spaces that are formed, during assembly, between the aforementioned electronic components 10, concave seats 19 and 20 and the flat contact element 21, are "filled".
[0045] The inner surface 18 of the lid 3 also has a step 58, which acts as a spacer element of the lid 3 in relation to the printed circuit 28.
[0046] More specifically, step 58 prevents the printed circuit 28, in the area of the MOSFET exciter 65 and microcontroller 66, from contacting the cover 3, avoiding short-circuits and abnormal mechanical stresses, with heat exchange being guaranteed by the presence of thermally conductive paste 22.
[0047] The outer surface 23 of the lid 3 has a plurality of fins 24 to dissipate the heat generated by the electronic module 8. The fins 24 extend radially and have a predetermined thickness, in order to better perform their dissipation function.
[0048] The fins 24 have a height dimensioned in order to obtain the maximum possible efficiency, considering the design dimensions specified in relation to the heat exchange with the environment.
[0049] The outer surface 23 of the lid 3 also has a first convex portion 25 having a "corresponding" shape to the base of the concave portion 19 of the inner surface 18 of the lid 3, and a second portion 26, also convex, having a "corresponding shape. "to the base of the concave portion 20.
[0050] The fins 24 are mainly positioned on the first and second portions 25 and 26 of "corresponding" shape and on the contact element 21, in order to remove the greatest possible amount of heat produced by the electronic components 10.
[0051] Looking at more details of the electronic module 8, with reference to figures 4 to 6, it should be noted that the electronic module 8 of the electrical machine 1 comprises a printed circuit 28.
[0052] Printed circuit 28 is substantially known as "PCB", that is, "Printed Circuit Board" ("Printed Circuit Board"). As illustrated, all electronic components of power 67 and signal 68 are positioned on the component side 8a of the printed circuit 28, which forms the aforementioned first side of the electronic module.
[0053] The electronic module 8 also comprises a plurality of conductive tracks 30 that implement direct connections between all the electronic components of power 67.
[0054] More precisely, the conductive tracks 30 form a plurality of electrical connections between the electronic components of power 12a, 64 of the "SMD" type and the electronic components 11 of the "PTH" type.
[0055] The conductive tracks 30 are positioned on a second side or side of the weld 40, opposite the side of the components 8a of the printed circuit 28. In other words, the PCB set 28, the electronic components 10, both of the SMD type 12 as of the conventional PTH 11 type, and the conductive tracks 30, constitute the electronic module 8, which forms a motor control circuit 1 allowing the supply to be conveniently controlled.
[0056] As shown, the conductive tracks 30 comprise a plurality of connection tabs 32 and connection terminals 32a. The connection terminals 32a are soldered to the printed circuit 28.
[0057] More specifically, the conductive tracks 30 have a first, a second and a third set of flaps 33, 34 and 35.
[0058] The first set of flaps 33 is welded to terminals 9 of electrical winding 6.
[0059] The second set of flaps 34 comprises a flap 34a, soldered to terminal 16a of inductor 11b, and flaps 34b, soldered to terminals 15 of capacitors 11a.
[0060] More specifically, with reference to inductor 11b, it should be noted that the inductor has a first terminal 16a welded to a flap 34a, and a second terminal 16b welded to one of the conductive tracks 30 without a corresponding flap.
[0061] The electrical machine 1 comprises cables 37 for connection to a power network not shown.
[0062] The cables 37 are soldered to the third set of tabs 35, and form the power supply circuit of the electronic module 8.
[0063] As shown in figures 4 and 5, the printed circuit 28 is equipped with a plurality of through-holes coated with metal 38.
[0064] The metal-coated through holes 38 are designed so that the corresponding connection terminals 32a and connection flaps 32 are partially inserted into the holes, passing through the printed circuit 28.
[0065] More specifically, the flaps 34b soldered to the terminals 15 of capacitors 11a are inserted into the respective hole 38a of the printed circuit 28. The third set of connection flaps 35 also crosses the printed circuit, through the respective holes 38b.
[0066] Advantageously, capacitors 11a and inductor 11b are directly supported by some of the conductive tracks 30, and in particular by the connection flaps 34a and 34b, to which the respective terminals 15 and 16 are welded.
[0067] The electronic module 8 comprises a plurality of spacing elements 39 between the conductive tracks 30 and the printed circuit 28. The spacer elements 39 allow air to circulate between the conductive tracks 30 and the printed circuit 28, thus creating a path "parallel" for the dissipation of the heat generated by the conductive tracks 30, which do not touch the printed circuit 28; they also guarantee the absence of direct contact between the conductive tracks 30 and the printed circuit 28, preventing the occurrence of accidental short circuits.
[0068] Advantageously, the spacing elements 39 are integrated in the plurality of conductive tracks 30, forming protuberances located on the same side of the connection flaps 32.
[0069] Optionally, the spacing elements 39 are welded to the corresponding areas on the 40 side of the printed circuit 28.
[0070] The electric machine 1 comprises a support 41, preferably made of disc-shaped plastic material, housing the electronic module 8.
[0071] As shown in figure 3, support 41 is equipped with a seat 42 designed to accommodate electronic module 8.
[0072] The support has a set of openings 43 provided for the terminals 9 of the electrical winding 6 welded to the first set of flaps 33.
[0073] Advantageously, the conductive tracks 30 are free to deform regardless of the deformations of the plastic support 41, that is, as the plastic part is separated from the circuit, the mechanical stresses in the welds between the flaps 32 of the conductive tracks 30 and the printed circuit 28 are substantially reduced.
[0074] The electric machine 1 comprises a plurality of elastic elements 44 that push the electronic module 8 away from the stator 5, towards the cover 3. The elastic elements 44 operate between the stator 5 and the support 41, in order to push the electronic module 8 towards the cover 3, to move the housings 13 in mechanical contact with the cover; this ensures that the terribly conductive paste 22 completely fills any gap created between the housings and the cover, thereby ensuring the optimal dispersion of the heat generated.
[0075] More specifically, stator 5 has a plurality of tubular seats 45 for elastic elements 44. Tubular seats 45 are formed in an insulated portion of stator 5.
[0076] It is interesting to note that the design and distribution of the elastic elements 45 is performed for an ideal distribution of the forces that push the electronic module 8 through the support 41.
[0077] In the illustrated embodiment, the stator has three tubular seats 45 for corresponding elastic elements 44, arranged along the periphery of the stator 5 and spaced at equal angular intervals.
[0078] Alternatively, there are six tubular seats 45 of the elastic elements 44, each provided with the respective elastic element and positioned along the periphery of the stator 5, again spaced at equal angular intervals.
[0079] The tubular seats 45 hold and guide the elastic elements 44 during their pushing action.
[0080] The support 41 also has a plurality of guides, not illustrated, on which the elastic elements 44 act. The guides are positioned on the side of the support 41 opposite the side where the seat 42, designed to house the electronic module 8, is made, and they are positioned along the periphery of the support 41, so that each guide corresponds to the respective tubular seat 45 of stator 5.
[0081] Preferably, the elastic elements 44 are metal springs.
[0082] As shown in figure 8, the electric machine 1 comprises a bearing 47 that operates between an axis 48, which transmits the movement, rigidly connected to the rotor 7, and the container 4, to rotatively fix the rotor 7 to the container 4.
[0083] Bearing 47 is rigidly connected to shaft 48 and, in particular, is positioned at one of its two ends 48a.
[0084] The inner surface 18 of the cap 3 has a fourth portion 49 that forms a bearing seat 47. The seat seat 49 is equipped with a gasket 63 to compensate for any gap between the bearing 47 and the cap 3.
[0085] In this way, bearing 47 faces side 8a of electronic module 8, where electronic components 12 "SMD" and electronic components 11 "PTH" are present.
[0086] Printed circuit 28 has an orifice 50 coaxial with the axis of rotation R, having a diameter "d" smaller than the outer diameter "D" of bearing 47. The support 41 has a guide 51 coaxial with the axis of rotation R, having an external diameter "dl" smaller than the diameter "d" of the orifice 50.
[0087] The diameter "dl" of the guide 51 is substantially smaller than the diameter "d" of the orifice 50, in order to allow the centralization and correct positioning of the electronic module 8 in the support 41.
[0088] As described in more detail below, the orifice 50 and the guide 51 are designed to allow the assembly of the electronic module 8 in the housing 2 complete, with the stator 5 and the winding 6, only if the axis 48 of the rotor 7 is not bearing 47.
[0089] Advantageously, the more the size of the orifice 50 of the electronic module 8 decreases, the more the area of the printed circuit 28 increases to house the electronic components 10. In this specific case, the reduction of the diameter of the orifice 50 is particularly advantageous because both electronic components 12 "SMD" and electronic components 11 "PTH" are located only on the 8a side of the printed circuit 28.
[0090] As indicated, the power supply for electrical machine 1 is provided using the power supply cables 37, welded to the third set of tabs 35.
[0091] With particular reference to figures 3 and 7, it should be noted that the cover 3 has a plurality of openings 52. The third set of tabs 35, which is part of the multiplicity of conductive tracks 30, is inserted in the respective openings 52, so that the free ends protrude from the cover 3.
[0092] In the openings 52 there is a joint 53 interposed between the cover 3 and the third set of flaps 35.
[0093] The joint 53 has grooves 53a for the corresponding flaps 35, and its shape covers at least partially the flaps 35 with respective sleeves 53b.
[0094] It should be noted that the sleeves 53b are partially inserted in the openings 52, in order to guarantee a seal between the lid 3 and the flaps 35, and to prevent the entry of foreign agents in the container 4.
[0095] The electrical machine 1 comprises a first and a second guide 54 and 55, joined to secure the power supply cables 37.
[0096] The first and second guides 54 and 55 form an element 56 for securing cables 37.
[0097] In an alternative embodiment, not shown, the fastening element 56 is formed as a single component.
[0098] The fixing element 56 is coupled with the cover 3 to keep the cables 37 stationary in relation to the third set of flaps 35, allowing reciprocal welding.
[0099] A cover 57 partially covers the fastening element 56, so that the cables 37 extend out of the electrical machine 1 for connection to a power supply source.
[0100] Advantageously, to guarantee a hermetic seal in the welding between the cables 37 and the power supply circuit of machine 1, a resin, not shown, completely covers the welding, remaining protected by the cover 57.
[0101] The cover 57 has a hole 59 for the injection of resin and a through hole 60 for air ventilation.
[0102] Housing 2 is equipped with a plurality of fins 61 positioned along the outer cylindrical surface of housing 2. The fins have a predetermined thickness and height to form a heat exchange surface designed to dissipate the heat generated, in particular by winding 6 of stator 5.
[0103] This invention also relates to a method for assembling machine 1 as described above, the description of the method being also limited only to what is necessary for understanding the invention.
[0104] The assembly method comprises the steps of preparing the housing 2, inserting the stator 5 in the housing 2 with the respective windings 6, insertion of the rotor 7 in the housing 2 with the exception of bearing 47, and preparation of the elastic elements 44 in the seats tubular 45 of the stator 5. The housing 2 is equipped with a joint 62 located at the end of the shaft 48 of the rotor 7, which extends out of the housing 2, in order to prevent the entry of foreign agents.
[0105] The support 41 is positioned so that the terminals 9 of the windings 6 are located in the openings 52, and so that the elastic elements 44 are coupled in the respective seats, not shown, of the support 41.
[0106] The electronic module 8 is positioned on the seat 42 of the support 41 so that the first set of connection flaps 33 is located in the openings 43.
[0107] Advantageously, the electronic module 8 and the support 41 are pre-assembled, that is, the module 8 is connected to the support 41 and they are then inserted together in the housing 2.
[0108] The terminals 9 of the electrical winding 6 are welded to the first set of flaps 33, forming a safe electrical contact between the parts.
[0109] The method then comprises inserting the bearing 47 at the end 48a of the shaft 48 of the rotor 7.
[0110] The thermal conductor 22 is positioned on the internal surface 18 and on the seats 19 and 20 of the cover 3.
[0111] The thermal conductor 22 is also positioned directly on the electronic components 10. Thus, the thermal conductor 22, in addition to being interposed between the housing 13 of the MOSFETs 12a and the cover 3, also touches the terminals of the electronic components of power 67 and the electronic signal components 68, which are therefore also placed in thermal contact with the cover 3 by means of the thermal conductor 22, improving the heat dispersion, as shown in figure 9.
[0112] The cover 3 is then positioned on the electronic module 8, so that the seats 19, 20 and the contact element 21 are positioned on the electronic components 11 "PTH" and the electronic components 12 "SMD".
[0113] Gasket 53 is positioned on flaps 35, and an annular TI joint is interposed between cover 3 and housing 2.
[0114] After the cover 3 has been positioned and fixed to the housing 2 in a substantially known manner, not described, the fastening element 56 of the cables 37 is connected to the cover 3, and the third set of flaps 35 is welded to the cables 37 .
[0115] The weld set is sealed by the resin injected into hole 59 of cover 57.
[0116] With the motor assembled, the elastic elements 44 act on the support 41 pushing the electronic module 8 towards the cover 3. In this way, the electronic components of power 67 are all moved in direct contact with the cover 3, which will act as contact element and heat sink.
[0117] Advantageously, since the elastic elements 44 act on the support 41, the latter prevents the pushing action of the elastic elements 44 from deforming the electronic module 8.
[0118] The aforementioned step 58 contributes to maintaining a substantial flatness of the printed circuit 28, preventing the exciter 65 and the microcontroller 66 from contacting the cover 3.
[0119] Looking more closely at the assembly of the electronic module 8, a method for mounting the module is described.
[0120] The method of assembling the electronic module 8 includes a preparation step, with known methods, of the printed circuit 28.
[0121] The method comprises placing, on the first side 8a of the printed circuit 28, the electronic components of power 12a, 64 "SMD", and the electronic components of signal 68, after interposition of a thin layer of solder paste.
[0122] With advantages, the welding step of the electronic components "SMD" takes place in a temperature controlled oven, according to the assembly technique known as "SMT", that is, "Surface Mounting Technology" ("Mounting Technology" of surface").
[0123] Welding occurs by keeping printed circuit 28 in a substantially horizontal position, with components 12 resting on the printed circuit.
[0124] The assembly method comprises, at this point, the rotation of the printed circuit 28 in 180 °, with all the electronic components 12a, 64 "SMD" already welded, so that the components face down and the side 40 be accessible from above to facilitate the positioning of the conductive tracks 30.
[0125] This is followed by the positioning of the conductive tracks 30 on the side 40 of the printed circuit 28, so that the connection flaps 34b, the third set of flaps 35 and the connection terminals 32a are inserted in the respective holes 38a, 38b and 38.
[0126] The conductive tracks 30 are then soldered to the printed circuit 28. Advantageously, the soldering of the conductive tracks 30 takes place in a temperature-controlled oven, to prevent deterioration of the previously made welds and, in particular, to prevent the electronic components 12a , 64 "SMD", previously welded on side 8a of the printed circuit, come loose. After welding the conductive tracks 30 with the printed circuit 28, the set formed is again rotated 180 ° to make the flaps 34a and 34b accessible from above, to facilitate the positioning of the electronic components 11 "PTH".
[0127] The electronic components 11 "PTH" are now soldered to conductive tracks 30; in particular, the terminals 15 of the capacitors 11a are soldered to the respective connection flaps 34b, the terminal 16a of the inductor 11b to the respective connection flap 34a, and the terminal 16b of the inductor 11b to the respective conductive track.
[0128] In a second form of incorporation, the assembly process of the electronic module 8 consists of placing, in a known manner, a solder paste on side 8a of the printed circuit 28, and positioning all electronic components on that side 12a, 64 "SMD".
[0129] The method comprises, at this point, the rotation of the printed circuit 28 in 180 °, with all the electronic components "SMD" positioned on the side 8a, but not welded, so that they are facing downwards, and the side 40 is accessible from above. The interposition of the welding paste between the electronic components 12a, 64 "SMD" and the printed circuit 28 prevents the components from loosening even facing downwards, after the aforementioned rotation.
[0130] The conductive tracks 30 are then positioned on the 40 side of the printed circuit 28, so that the connection flaps 34b, the third set of flaps 35 and the connection terminals 32a are inserted into the respective holes 38a, 38b and 38 .
[0131] The electronic components 12a, 64 "SMD" and the conductive tracks 30 are now soldered in a single operation to the printed circuit 28; advantageously, welding takes place in a temperature-controlled oven.
[0132] Similar to the previous assembly method, after carrying out the above welding in a single operation, the set formed is again rotated 180 ° to make the flaps 32 of the conductive tracks 30 accessible from above, to facilitate the positioning of the electronic components 11 "PTH" and perform the respective welding.
[0133] It is evident, from the previous description, how the various drawbacks highlighted above, with reference to the state of the art, are eliminated by this invention.
[0134] The positioning of the power electronic components 67 on the 8a side of the printed circuit 28, allowing the component housings - after the thermal conductor interposes - to be placed in contact with the cover 3, allows the heat generated by them to be effectively dissipated through the housing; this is possible because the thickness of the component housings currently on the market is considerably less than that of the component housings of previous generations.
[0135] Regarding the state of the art, the electronic module 8 has the printed circuit 28 soldered to the plurality of conductive tracks 30; this simplifies both the production process and the assembly of the electronic module 8, providing a great economic advantage.
[0136] The conductive tracks 30, being preferably made of copper, have a coefficient of linear thermal expansion similar to the coefficient of linear thermal expansion of the printed circuit 28, thus ensuring a greater degree of reliability of the welds between the conductive tracks and the printed circuit.

权利要求:
Claims (6)
[0001]
1. Rotating electrical machine, including an electronic module (8) comprising: a printed circuit (28); a plurality of "SMD" type electronic power components (12, 64); and a plurality of "SMD" type electronic signal components (68); a plurality of "PTH" type electronic components (11); the "SMD" power electronics (12a, 64), the "SMD" signal electronics (68) and the "PTH" electronics (11), being positioned on the first side (8a) of the printed circuit (28 ), where the machine is characterized by the electronic module (8) comprising a plurality of conductive tracks (30), with a plurality of flaps (34) supporting the electronic components "PTH" (11), positioned on a second side ( 40) of the printed circuit (28) opposite the first side (8a), with the plurality of conductive tracks (30) forming a plurality of electrical connections between the electronic components of power "SMD" (12a, 64) and the electronic components " PTH "(11).
[0002]
Rotating electrical machine according to claim 1, characterized in that the conductive tracks (30) comprise elements (39) to space the conductive tracks (30) of the printed circuit (28).
[0003]
3. Rotating electrical machine, according to claim 1 or 2, characterized by comprising a heatsink (3) for the dispersion of the heat generated by the electronic module (8), a thermal conductor (22) interposed between the electronic components of power " SMD "(12a, 64), the" SMD "signal electronics (68), the" PTH "electronics (11) and the heatsink (3), where the" SMD "power electronics (12a, 64) , the "SMD" signal electronics (68) and the "PTH" electronics (11) are in contact with the heatsink (3) through the thermal conductor (22), with the machine comprising a support (41) that houses the electronic module (8) positioned opposite the heatsink (3), and a plurality of elastic elements (44) acting on the support (41), where the elastic elements (44) push the electronic components "SMD" of power and signal (12a, 64, 68) and the electronic components "PTH" (11) against the heatsink (3), through the support (41).
[0004]
Rotating electric machine according to any one of claims 1 to 3, characterized in that it comprises a housing (2), a rotor (7) inserted in the housing (2), a cover (3) to close the housing (2) , forming with the housing (2) a closed container (4), and a bearing (47) to connect the rotor (7) with the closed container (4), where the printed circuit (28) has a coaxial hole (50) with a rotation axis (R), which has a diameter (d) smaller than the outside diameter (D) of the support (47).
[0005]
5. Method of assembling a rotating electrical machine as described in any one of claims 1 to 4, characterized in that it comprises an assembly step for the electronic module (8), comprising a step for positioning the "SMD" power electronic components (12a , 64) and the "SMD" signal electronics (68) on the first side (8a) of the printed circuit (28), a first step of welding the "SMD" power electronic components (12a, 64) and the electronic components "SMD" signal (68) on the first side (8a) of the printed circuit (28), a step of positioning a plurality of conductive tracks (30) on the second side (40) of the printed circuit (28) opposite the first side (8a), a second step of welding the plurality of conductive tracks (30) with the printed circuit (28), a step of positioning the electronic components "PTH" (11) on the flaps (34), and a third step of welding from the electronic components "PTH" (11) to the tabs (34).
[0006]
6. Method of assembling a rotating electrical machine according to claim 5, characterized in that the first and second welding steps occur simultaneously.

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同族专利:

公开号 | 公开日

US20140139059A1|2014-05-22|

EP2732534B1|2015-09-09|

WO2013008180A3|2013-12-27|

CN103733485A|2014-04-16|

CN103733485B|2017-03-01|

KR101935934B1|2019-01-07|

WO2013008180A2|2013-01-17|

JP5960813B2|2016-08-02|

US9148044B2|2015-09-29|

ITBO20110413A1|2013-01-12|

KR20140050049A|2014-04-28|

RU2014103877A|2015-08-20|

EP2732534A2|2014-05-21|

ES2553240T3|2015-12-07|

BR112014000619A2|2017-02-14|

JP2014521297A|2014-08-25|

RU2582665C2|2016-04-27|

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法律状态:
2018-12-11| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

2019-10-01| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|

2020-06-23| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|

2020-11-10| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 10/07/2012, OBSERVADAS AS CONDICOES LEGAIS. |

优先权:

申请号 | 申请日 | 专利标题

ITBO2011A000413|2011-07-11|

IT000413A|ITBO20110413A1|2011-07-11|2011-07-11|ROTARY ELECTRIC MACHINE AND RELATIVE ASSEMBLY METHOD.|

PCT/IB2012/053527|WO2013008180A2|2011-07-11|2012-07-10|Rotating electric machine and related packaging method|

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