Classifications

• • 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
  • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
  • H02K5/225—Terminal boxes or connection arrangements
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/30—Structural association with control circuits or drive circuits
  • H02K11/33—Drive circuits, e.g. power electronics

Definitions

• An electronic module comprising an electric motor, preferably an electrically commutated motor
• the invention relates to an electronic motor comprising an electric motor, preferably an electrically commutated motor comprising a housing in which an electronic module consisting of an electronics unit and a heat sink, is arranged, wherein the housing is closed by a heat sink and the tapped on a stator e - Lektrischen motor phases are connected to a plug unit.
• Electrically commutated motors are used for example in clutch and transmission controls of motor vehicles.
• control units and inverter circuits are required.
• Such control units and converter circuits are combined in an electronic module, where they are arranged, for example as a separate electronic unit separated from the housing of the electric motor.
• the electronic unit is arranged in the housing of the electric motor, wherein the electronic unit is connected to a heat sink to an electronic module, which forms the end of the housing.
• these arrangements are very compact and take up much space, whereby additional costs for the sealing and the formation of the housing parts are necessary.
• the invention is therefore based on the object of specifying an electric motor together with its control, despite small integrated electronic module in the housing has small radial and axial dimensions, which are associated with low production costs.
• the object is achieved in that the mechanical connections of the electronics unit with the heat sink and / or the housing and / or the electrical connection of the electric motor phases of the stator and the electronics unit with the connector unit are designed schraubharmsok.
• the screw-free versions of the electrical or mechanical connections space is saved, so that the electronic module can be positioned well in a housing of the electric motor both in the radial and in the axial direction.
• the electronics unit is positioned directly on the heat sink.
• the heat sink has a circumferential channel for receiving a sealing element, which is arranged in the radial direction relative to the housing.
• a sealing element which is preferably designed as an O-ring, a very small space in the axial and radial direction is required and still ensures sufficient tightness.
• Combustion chamber sealed and electronically contacted.
• the tightness is ensured even at a high thermal cyclicity, wherein the electronic unit is sealed against vibration and moisture, such as salt spray.
• the housing has at least one, preferably integrally formed from the housing bending tab, which is bent radially from the outside in the direction of the heat sink.
• the electronic module is fixed in the radial and / or axial direction. This has the advantage that vibrations of the motor vehicle have no effect on the electronic module and its operation.
• supporting elements preferably as a local embossing of the housing, for supporting the electronic module are formed radially on the inside of the housing. These support elements ensure a support of the electronic module in the axial direction and are easy to produce. In one alternative, the support elements, preferably one-piece, are part of the
• Heat sink which protrude in the axial direction through a respective recess of a printed circuit board of E lektronikmoduls as a spacer to the stator through into the housing.
• spacers are formed circumferentially as a geometric part of the heat sink and terminate at the stator.
• Recesses in the circuit board of the electronic module ensure the lateral space for the spacers in the assembly.
• the heat sink on its circumference on partial radial contact surfaces to the housing as a radial guide of the electronic module.
• the plug unit is anchored in the heat sink and preferably encapsulated on this with plastic.
• this design can be dispensed with an additional carrier of the plug unit within the electronic module, whereby the space of the electric motor is further reduced.
• the plug unit has an overmolded stamped grid, on each of which an insulation displacement connection for one of the motor phases formed in the stator is arranged, wherein the insulation displacement connections are preferably an integral part of the stamped grid.
• the insulation displacement connections represent a cost-effective solution and require, in contrast to screw a much smaller space within the electric motor, which can therefore be made much more compact.
• the assembly of the electric motor through the use of insulation displacement connections simplifies, since the electrical contact between plug unit and stator can be done in one step.
• the insulation displacement terminals are connected to the motor phases of the stator, preferably crimped, wherein the cutting terminals are guided in recesses of the stator and engage in the lead frame of the plug unit.
• the electronics unit is constructed at least in two parts, wherein the two parts are arranged at different levels in the axial direction in the housing. This also leads to a very compact design of the electric motor, if for certain applications, the existing surface of the electronics unit is not sufficient and a radial alignment of the electronic module should be avoided to ensure the compactness of the electric motor.
• FIG. 1 Schematic representation of the electric motor with an electronic module
• Figure 2 a section through the electric motor with the electronic module
• Figure 6 radial guidance of the electronic module in the motor housing.
• FIG 8 Housing of the electric motor with wiring harness
• FIG. 9 Arrangement of the plug unit on the electric motor
• Figure 10 different geometric configurations of the electronic module in the electric motor
• FIG. 1 shows an electrically commutated motor together with control electronics 1, as used, for example, to control a clutch actuator in a motor vehicle. It is a brushless DC motor, also known as a BLDC motor (brushless DC motor), in which the usual mechanical commutator with breasts is replaced for current application by an electronic circuit.
• this electric motor 1 consists of a deep-drawn housing 2, which is sealed by a heat sink 3 made of an aluminum die-cast part.
• a plug unit 4 made of plastic is part of the heat sink 3 and injected, for example, or glued in this.
• the cylinder-like housing 2 of the electric motor 1 has at its radial periphery, facing the heat sink 3, a plurality of bending tabs 5, which are integrally formed from the housing 2 and folded in the direction of the heat sink 3, so as an axial fixation of, from the electronics unit and the heat sink 3 existing electronic module 7 to achieve.
• the electronic unit 6, 9 comprises a printed circuit board 6, which is equipped with electrical components 9. This circuit board 6 is glued directly to the heat sink 3 and then electrically connected to the connector pins 10 of the plug unit 4, which can be done for example by soldering or press-fit pins.
• the printed circuit board 6 has a recess 8, through which the plug unit 4 projects for the purpose of establishing an electrical connection with the three motor phases of the electric motor 1.
• FIG. 2 shows a cross section through the electric motor together with control electronics 1.
• a stator 1 1 of the electric motor 1 is positioned in the interior of the housing 2, which consists of three stator phases or motor phases not shown.
• the motor phase is connected via an insulation displacement connection 12 with the plug unit 4, which engages through the recess 8 of the circuit board 6.
• the insulation displacement connection 12 of the plug unit 4 consists of a stamped grid 16, which has cutting elements 15, wherein the cutting elements 15 are integral components of the stamped grid 16.
• the punched grid 16 with the insulation displacement connections 12 is molded in the plug unit 4.
• FIG. 3 a shows the sealing of the electric motor 1 with respect to the ambient conditions.
• a radially encircling sealing element 13 extends in a channel of the heat sink 3, wherein the circumferential sealing element 13 is formed for example as an O-ring.
• the heat sink 3 has at predetermined intervals on its circumference constriction 14 which extend in the radial direction of the heat sink 3, said constriction 14 is included by a respective bending tab 5 of the housing 2 to the heat sink 3 and thus the entire Electronic module 7 reliably and vibration-resistant to the housing 2 to attach (Figure 3b).
• the sealing element 13 is pressed after the folding of the bending tabs 5 through the heat sink 3 against the housing 2, whereby a reliable seal against moisture such as salt spray and the like is ensured.
• the sealing element 13 can also rest on the outside of the heat sink 3 and are spanned there by the bending tab 5, wherein the bending tab 5 has at its free end an angled which in a recesses of the heat sink 3 intervenes.
• the seal is also conceivable as a clamping connection, wherein on the outside of the heat sink 3 positioned sealing element 13, a cover is formed, against which the bending tab 5 abuts with its angled portion and is biased against this, so that a dense Connection is made.
• These spacers 17 surround the heat sink 3 radially and engage through partial recesses 18, which are arranged on the outer circumference of the printed circuit board 6, through the printed circuit board 6 therethrough. The spacers 17 thus extend axially in the electric motor 1 ( Figure 4).
• FIG. 5 Another variant for the axial support of the electronic module 7 is shown in Figure 5, where the housing 2 has at its periphery a plurality of local indentations 19 which are directed inwards and on which the electronic module 7, consisting of printed circuit board 6 and heat sink 3, is supported ,
• the dimensioning of the local impression is designed so that the electronic module 7 is firmly clamped between the fixed by the bending tab 5 heat sink 3 and the local characteristics 19 of the housing 2.
• FIG. 6 A further embodiment for supporting the electronic module 7 is embodied in FIG. 6, in which radial protrusions 20 extend at the heat sink 3, by means of which the Heat sink 3 and thus the electronic module 7 is pressed into the housing 2.
• the projections 20 thereby form partial contact surfaces to the circumference of the housing 2.
• the insulation displacement technology for the electrical connection of the stator 1 1 with the electronic module 7 and its plug unit 4th selected.
• This connection technique can be applied in two different variants.
• the insulation displacement technique is applied to the stator side, where the insulation displacement terminals 15 are connected to the wire phase outputs of the stator coils by a crimping technique, as shown in FIG.
• the insulation displacement terminals 15 are guided in the stator 1 1 in recesses 22, these recesses 22 may be either parts of a plastic-coated cover flap of the stator 1 1 or part of a plastic extrusion of the stator 1 1 itself.
• the plug unit 4 On the side of the plug unit 4 advantageously three recesses are formed with insertion bevels, where the lead frame 16 is encapsulated, in which engage the insulation displacement terminals 15 during assembly.
• the electrical connection of the motor phases takes place at the same time, since the insulation displacement terminals 15, which are attached to the stator 1 1, are pressed with the stamped grid 16 of the plug unit 4.
• the insulation displacement technique is carried out to the effect that the insulation displacement terminals 15 are made as part of the overmoulded punched grid 16 in the plug unit 4.
• the punched grids 16 lead from one side back into the printed circuit board 6 in order to establish the electrical connection with the electrical components 9 of the printed circuit board 6. From the other side, the punched grid 16 with the wires of the motor phases of the stator 1 1 form a insulation displacement connection.
• FIG. 8 shows a section through the electric motor 1 in the region of the heat sink 3, in which the plug unit 4 is replaced by a cable harness 21.
• the cable harness 21 is soldered to the printed circuit board 6 and sealed in the region of the heat sink 3.
• the plug unit 4 can be designed with its outlet in different directions. leads, as shown in Figure 9, where dotted the possible positions of the plug unit 4 are shown. The selected position of the plug unit 4 is selected due to the space requirements in the clutch actuator.
• FIG. 10 shows different geometric configurations of the electronic module 7, wherein in particular a plan view of the heat sink 3 is shown.
• the different configurations, whether round, oval or combinations thereof, are related to the installation space requirements of the clutch actuator and the functionality of the electronic module 7. Should the existing surface of the circuit board 6 for certain applications are not sufficient, there is the possibility of enlarging the electronic module 7 not only in the radial direction, but it is also possible to ensure the larger area requirement for the assembly of electrical components 9 by two printed circuit boards 6, which are arranged on a different level in the axial direction one above the other in the housing 2.
• the described structural design of the electric motor 1 thus allows a compact integration of serving as a control unit electronic module 7. Together with the compact design, the integration solution offers a high cost advantage.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Microelectronics & Electronic Packaging (AREA)
• Motor Or Generator Frames (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49225987

Family Applications (1)

Country Status (4)

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• 2013
  • 2013-08-13 WO PCT/DE2013/200119 patent/WO2014048425A2/de active Application Filing
  • 2013-08-13 DE DE102013215949.8A patent/DE102013215949A1/de not_active Withdrawn
  • 2013-08-13 EP EP13765625.2A patent/EP2901543A2/de not_active Withdrawn
  • 2013-08-13 CN CN201380049460.7A patent/CN104704725B/zh active Active
  • 2013-08-13 DE DE112013004738.1T patent/DE112013004738A5/de active Pending

Non-Patent Citations (2)

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