WO2014195084A2 - Unité moteur/générateur - Google Patents

Unité moteur/générateur Download PDF

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Publication number
WO2014195084A2
WO2014195084A2 PCT/EP2014/059551 EP2014059551W WO2014195084A2 WO 2014195084 A2 WO2014195084 A2 WO 2014195084A2 EP 2014059551 W EP2014059551 W EP 2014059551W WO 2014195084 A2 WO2014195084 A2 WO 2014195084A2
Authority
WO
WIPO (PCT)
Prior art keywords
motor
cooling
generator unit
electric motor
individual channels
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2014/059551
Other languages
German (de)
English (en)
Other versions
WO2014195084A3 (fr
Inventor
Thomas Gabriel
Janko HORVAT
Peter Sever
Andreas Schmidhofer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Magna Powertrain GmbH and Co KG
Original Assignee
Magna Powertrain GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Magna Powertrain GmbH and Co KG filed Critical Magna Powertrain GmbH and Co KG
Publication of WO2014195084A2 publication Critical patent/WO2014195084A2/fr
Publication of WO2014195084A3 publication Critical patent/WO2014195084A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • H02K5/20—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
    • 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
    • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
    • H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
    • H02K11/05—Rectifiers associated with casings, enclosures or brackets
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil

Definitions

  • the present invention relates to a motor / generator unit of the type of claim 1.
  • Such motor / generator units are used, for example, in electric vehicles or hybrid vehicles.
  • the converter unit may have an inverter or inverter as well as modules for power and energy control.
  • the individual functions of the converter unit are usually provided by various electronic components such as power semiconductor elements and power capacitors.
  • the design of the cooling system is important. Compared to ambient air cooling, active fluid cooling is characterized by a considerably increased cooling effect.
  • the cooling fluid is preferably first pumped, starting from a cooler, into the converter unit in order to cool the components of the power electronics. From the power converter unit, the cooling fluid then passes to the windings of the motor to cool it. Subsequently, the cooling fluid is returned to the radiator, whereby the circuit is closed. In the cooler, the heat absorbed by the cooling fluid is released again, for example to the Ambient air so that it can be used again for efficient cooling.
  • the cooling fluid could also be routed first to the windings of the electric motor and then to the power converter unit.
  • the windings of the electric motor and certain components of the power converter unit can also be supplied with cooling fluid essentially by parallel or by separate cooling circuits.
  • Such cooling concepts are described in the publications EP 2 346 146 A1, JP 2005 020 881 A and
  • the first cooling channel has a plurality of individual channels connected in parallel, which supply components of the power converter unit or of the electric motor to be cooled separately from one another and open the output into a common pressure equalization chamber, which communicates with at least one second cooling channel in fluid chamber - Bond is through which the electric motor or the power converter unit can be supplied with cooling fluid.
  • the division of the cooling channel into several parallel individual channels allows a simultaneous supply of different components with cooling fluid at substantially the same temperature. Due to the pressure equalization chamber which is common to all individual channels, there is the possibility of compensating fluid flow or compensating propagation of pressure peaks between the discharge points of the individual channels, so that the cooling fluid pressure prevailing at the discharge points is essentially the same. In this way, the same coolant flow rate can be maintained in all individual channels largely. In particular, so-called "hotspots", i. Area with elevated temperature, avoided.
  • the pressure compensation chamber is preferably a channel closed in the circumferential direction, which is in particular of annular design and is arranged concentrically to a rotation axis of a motor shaft of the electric motor. Due to its geometry, such a closed channel favors equal flows between the mouth points. A concentric arrangement also allows an axially compact design.
  • An embodiment of the motor / generator unit provides that mating parts of the individual channels are arranged distributed in the pressure equalization chamber along the circumference of the pressure equalization chamber, in particular uniformly.
  • the outlet points can be arranged at the same angular distance from one another. Due to the distributed arrangement results in a particularly reliable pressure equalization.
  • the pressure compensation chamber can be integrated in a housing or housing component of the electric motor. This results in a particularly simple and compact construction.
  • the pressure equalization chamber can be formed directly on a housing or housing component of the electric motor.
  • the pressure compensation chamber is formed on an inner side of a jacket section of the housing or of the housing component enclosing the electric motor in the circumferential direction.
  • the pressure compensation chamber can also be formed at least partially by a recess formed on the inside of the jacket section, in particular a groove closed in the circumferential direction. Such a depression is easy to produce.
  • the recess can be covered by a component to be arranged in the interior of the housing in order to close it in a fluid-tight manner.
  • the electric motor may be multi-phase, in particular three-phase, in which each of the individual channels of the first cooling channel is assigned in each case exclusively to components assigned to one of the several phases of the electric motor. th the power converter unit supplied with cooling fluid.
  • the parallel supply of the components of the individual phases with cooling fluid avoids the undesirable situation that the performance and the life of the motor / generator unit are determined by the "warmest phase", that is, by the components of the phase operating in the unit be cooled least efficiently.
  • the second cooling channel may also have a plurality of individual channels connected in parallel, which supply components of the electric motor or the converter unit which are to be cooled separately from one another with cooling fluid.
  • a parallel supply of the components of the individual phases of the converter unit and the second cooling channel accomplish a parallel supply of the individual windings of the electric motor or vice versa.
  • the uniformity of the cooling fluid supply and thus the cooling effect can be further increased thereby.
  • An embodiment of the motor / generator unit provides that the first cooling channel branches downstream of a cooling fluid inlet of the motor / generator unit into the plurality of individual channels.
  • the supply of the cooling fluid from the outside can be done in a simple manner via a single, central inlet.
  • a circumferentially closed distribution space can be provided, which is connected both to the cooling fluid inlet and to the individual channels.
  • a distribution space can be used for the input side cooling of particularly heat-sensitive components.
  • the distribution space can accommodate a receiving space for an electronic component of the power converter unit, in particular a capacitor. Gate arrangement, at least partially surrounded in perennialsshchtung. The component is then flowed around by the cooling fluid and thus cooled particularly effective.
  • the power capacitors of a power converter generally represent its heat-sensitive assembly.
  • a flow around these capacitors is thus advantageous in that the distribution space in the flow direction of the cooling fluid is located immediately behind the cooling fluid inlet of the motor / generator unit, where the cooling fluid is still was not heated by other components to be cooled.
  • the individual channels of the first cooling channel are arranged radially outside the distribution space, so that the flow of the cooling fluid accordingly extends radially from the inside to the outside.
  • a radial direction is understood in particular to mean a direction which lies in a plane which extends perpendicular to a longitudinal extent of the motor / generator unit.
  • the central space of the unit can advantageously be used to circulate particularly critical individual components of the converter unit, such as a power capacitor arrangement, and the larger outer space for surface cooling of a plurality of semiconductor elements, such as power transistors.
  • a heat sink is arranged between the electric motor and the power converter unit, wherein the individual channels of the first cooling channel are guided along an end face of the heat sink and components of the power converter unit to be cooled, in particular power electronics modules. Components, in heat-conducting connection with the opposite end face of the heat sink stand.
  • the heat sink which may in particular be plate-shaped, separates the electronic components to be cooled from the fluid flow and may further delimit the power converter unit from the electric motor.
  • that end face of the heat sink, along which the individual channels of the first cooling channel are guided transversely and in particular perpendicular to one Rotary axis of a motor shaft of the electric motor aligned. That is, the flow of the cooling fluid in the individual channels of the first cooling channel is at least partially substantially in a plane between the electric motor and the converter unit, so that there is an axially particularly compact arrangement.
  • Current guide walls and / or webs may be provided on the heat sink, which cooperate with recesses of a housing or housing component of the electric motor to form the individual channels of the first cooling channel.
  • the design and arrangement of the current-carrying walls or webs may in particular be such that, at least in sections, a meander-shaped current conduction results.
  • the individual channels of the first cooling channel can communicate with the pressure equalization chamber via respective connecting channels running essentially rectilinearly and parallel to a rotational axis of a motor shaft of the electric motor, in particular wherein the connecting channels are integrated into the housing of the electric motor.
  • the cooling fluid can be used e.g. be guided directly from the individual channels of the first cooling channel to the arranged in the flow direction behind the first cooling channel pressure compensation chamber.
  • the connecting channels may have an elongated and / or curved cross-section, so that they can, so to speak, "snuggle up" to an inner wall cross-section of a section of the housing of the motor / generator unit.
  • a further embodiment of the motor / generator unit provides that a one-piece housing or housing component encloses a receiving space for the electric motor in the circumferential direction and is axially displaceable in one direction. borders, wherein the pressure compensation chamber, recesses for the individual channels of the first cooling channel, connecting channels between the individual channels and the pressure compensation chamber and / or provided for branching the first cooling channel in the plurality of individual channels distribution space in the one-piece housing or housing component are integrated.
  • This embodiment is based on the recognition that channels and flow spaces for a cooling system of a motor / generator unit can be provided in a particularly simple manner by incorporating them into the shape of a motor housing which is to be provided in any case.
  • FIG. 1 is a schematic representation of a motor / generator unit according to the invention.
  • Fig. 2 is a partial perspective view of a motor / generator unit according to an embodiment of the invention.
  • FIG. 3 is a plan view of the unit shown in FIG. 2.
  • FIG. 3 is a plan view of the unit shown in FIG. 2.
  • FIG. 4 shows the motor / generator unit according to FIG. 2 with the heat sink removed.
  • Fig. 5 is a perspective view of a housing component of the motor / generator unit of FIG. 2 from below.
  • FIG. 6 shows a heat sink of the motor / generator unit according to FIG. 2.
  • 7 is a sectional view of the motor / generator unit according to FIG. 2 along the line AA in FIG. 3.
  • Fig. 8 is a partial enlarged view of the sectional view shown in Fig. 7, showing a pressure compensation space.
  • Fig. 9 shows schematically a power converter unit of a motor / generator unit according to the invention.
  • the motor / generator unit 1 1 shown in Fig. 1 comprises an electric motor 13 which is e.g.
  • the power converter unit 15 serves to convert a DC current supplied to the motor / generator unit 1 1 into alternating current and not shown windings of the electric motor 13 in a controlled manner with the alternating current to power the electric motor 13 to a rotational movement about a rotation axis R.
  • the motor / generator unit 1 1 is-for example, designed for use in an electric vehicle or hybrid vehicle with an input voltage of at most 60V, this maximum voltage is not a mandatory limit.
  • a cooling system 17 is provided with a cooling fluid pump, not shown, which a cooling fluid, in particular water or a water-glycol mixture, successively through a first cooling channel 20 and a second cooling channel 21 pumps.
  • the first cooling passage 20 serves to cool the power converter unit 15, while the second cooling passage 21 serves to cool the windings of the electric motor 13.
  • the cooling fluid enters the motor / generator unit 11 at a cooling fluid inlet 19 and firstly enters a distribution space 23.
  • Each of the individual channels 25a, 25b, 25c connected in parallel supplies power electronics components 27a, 27b, 27c to be cooled with one of the three phases of the electric motor 13 with cooling fluid. In this way it is ensured that all phases of the power converter unit 15 are supplied with cooling fluid of substantially the same temperature.
  • the individual channels 25a, 25b, 25c open into a common pressure compensation chamber 30. From this again go three parallel individual channels 29a, 29b, 29c of the second cooling channel 21, which separately supply the winding of one phase of the electric motor 13 with cooling fluid.
  • the three parallel individual channels 29a, 29b, 29c are brought together again.
  • the cooling fluid exits and is fed to the cooling circuit via a heat exchanger, where the heat absorbed is released again.
  • the cooling system 17 is thus composed of a combination of parallel and serially interconnected channel sections.
  • the parallel-connected individual channels 25a, 25b, 25c of the first cooling channel 20 and the parallel-connected individual channels 27a, 27b, 27c of the second cooling channel 21 are in this case connected to each other via the common pressure equalization chamber 30 in series, which causes a pressure equalization between the respective parallel channel sections, such as is illustrated by the dashed double arrow.
  • the motor / generator unit 1 1 is housed in a housing which comprises a hood-shaped housing component 35.
  • the housing component 35 is composed of a cylindrical jacket section 37, which surrounds the electric motor 13 in the circumferential direction, and a cover section 39.
  • the cover section 39 delimits a receiving space for the electric motor 13 in the direction of an end face 22 opposite the end face 33.
  • a plate-shaped heat sink 41 can be seen, which is placed on the cover portion 39 of the housing member 35, as can be seen for example in Fig. 7.
  • the power converter unit 15 is - as shown in FIG. 9 by means of a further embodiment - mounted on the heat sink 41 such that the power electronics components 27a, 27b, 27c to be cooled are in heat-conducting contact with an end face 45 of the heat sink 41.
  • a condenser arrangement 47 of the converter unit 15 projects through a recess 49 (see FIGS. 2 and 9) of the heat sink 41 into a receiving space 51 formed by a depression in the cover section 39 of the housing component 35.
  • the power converter unit 15 has further electronic components 53, which are not provided for direct cooling by the cooling system 17.
  • the electronic components of the individual phases of the converter unit 15 are arranged offset by 120 ° with respect to a rotation axis R of the electric motor 13. 4, three trough-like depressions 55 are also formed on the cover section 39 of the housing component 35, which are arranged radially outside the receiving space 51 and the distribution space 23 and the current-carrying walls 57 projecting together with the end face 45 'of the heat sink 41 opposite one of the end faces 45 (see Figures 6 and 7) form the individual channels 25a, 25b, 25c of the first cooling channel 20.
  • the depressions 55 are connected to the pressure equalization space 30 via respective connecting channels 59 running parallel to the axis of rotation R and having an oblong cross-section, which is shown in FIGS. 7 and 8 by a circumferential direction formed on the inside of the skirt portion 37 closed groove is formed.
  • This groove is covered by a portion of the stator 61 and a stator cover of the electric motor 13, respectively.
  • Fig. 5 shows the receiving space for the electric motor 13, so that the pressure compensation chamber 30 and the individual channels 29a, 29b, 29c (further individual channels are present, but not seen in this perspective) can be seen.
  • Cooling system 17 circulating cooling fluid first via the cooling fluid inlet 19 in the near-axis distribution space 23 and flows around in this the receiving space 51 with the condenser assembly 47, whereby it is reliably cooled. From the distribution space 23, the cooling fluid flows radially outward into the individual channels 25a, 25b, 25c formed in each case by one of the recesses 49 and the walls 57 of the heat sink 41 and is introduced into these flat on those areas of the front side 45 'of the heat sink 41 along, in which are located on the Strinseite 45, the power electronics components 27a, 27b, 27c of the individual phases. Subsequently, the cooling fluid passes through the three connection channels 59 into the common pressure compensation chamber 30. From this, the cooling fluid in the three individual channels 29a, 29b, 29c of the second cooling channel 21 is guided along the windings of the electric motor 13 in order to cool them.
  • the motor / generator unit 1 1 with the integrated cooling system 17 is characterized by a particularly compact design.
  • a manufacturing technical advantage is that the pressure compensation chamber 30, the recesses 55 for the individual channels 25a, 25b, 25c of the first cooling channel 20, the connecting channels 59, the distribution space 23 and the individual channels 29a, 29b, 29c of the second cooling channel 21 all in one piece Housing component 35 are integrated. It should be noted, however, that not all of the components mentioned must be provided on or in the housing component. In addition, it is quite conceivable to provide the cover section separately, for example, to simplify the assembly of the unit 1 1.
  • Fig. 9 shows a further embodiment of the unit 1 1 in a schematic sectional view.
  • FIG. 9 also shows how the capacitor arrangement 47 protrudes into the receiving space 51, which is surrounded radially on the outside by the distribution space 23 and is thus cooled efficiently.
  • the individual channels 29a, 29b, 29c connected to the pressure compensation chamber 30 can not be seen in the present sectional plane.

Landscapes

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

Abstract

L'invention concerne une unité moteur/générateur qui comprend un moteur électrique et un module convertisseur électronique pour l'alimentation électrique contrôlée des bobinages individuels. Un premier canal de refroidissement dans lequel circule un premier fluide de refroidissement est prévu pour le refroidissement du module convertisseur ou du moteur électrique. Le canal de refroidissement présente plusieurs canaux individuels raccordés en parallèle qui alimentent séparément les composants à refroidir du module convertisseur ou du moteur électrique respectivement en fluide de refroidissement, et qui débouchent côté sortie dans une chambre commune d'équilibrage de pression, laquelle communique fluidiquement avec au moins un second canal de refroidissement qui assure l'alimentation du moteur électrique ou du module convertisseur respectivement.
PCT/EP2014/059551 2013-06-06 2014-05-09 Unité moteur/générateur Ceased WO2014195084A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013210559.2A DE102013210559A1 (de) 2013-06-06 2013-06-06 Motor/Generator-Einheit
DE102013210559.2 2013-06-06

Publications (2)

Publication Number Publication Date
WO2014195084A2 true WO2014195084A2 (fr) 2014-12-11
WO2014195084A3 WO2014195084A3 (fr) 2015-06-18

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2014/059551 Ceased WO2014195084A2 (fr) 2013-06-06 2014-05-09 Unité moteur/générateur

Country Status (2)

Country Link
DE (1) DE102013210559A1 (fr)
WO (1) WO2014195084A2 (fr)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
US20230412043A1 (en) * 2021-02-12 2023-12-21 Aisin Corporation Vehicle drive device
WO2024223445A1 (fr) * 2023-04-24 2024-10-31 Sonceboz Motion Boncourt Sa Moteur électrique avec système de refroidissement

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DE102015015551B4 (de) 2014-12-18 2025-02-06 Sew-Eurodrive Gmbh & Co Kg Elektromotor mit elektromagnetisch betätigbarer Bremse
DE102015015552B4 (de) 2015-01-26 2024-04-25 Sew-Eurodrive Gmbh & Co Kg Elektromotor mit elektromagnetisch betätigbarer Bremse
DE102015211048A1 (de) * 2015-06-16 2016-12-22 Siemens Aktiengesellschaft Elektrische Maschine
DE102015214053A1 (de) * 2015-07-24 2017-01-26 Siemens Aktiengesellschaft Elektroantriebseinheit, insbesondere für ein Elektrofahrzeug
DE102017112365A1 (de) * 2017-06-06 2018-12-06 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Elektromotor-Kühlanordnung
EP4380011A1 (fr) * 2022-11-29 2024-06-05 Siemens Aktiengesellschaft Dispositif de refroidissement pour machine électrique intégrée à un convertisseur
FR3143910A1 (fr) * 2022-12-20 2024-06-21 Valeo Equipements Electriques Moteur Machine électrique tournante à canal de refroidissement perfectionné

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Publication number Priority date Publication date Assignee Title
US20230412043A1 (en) * 2021-02-12 2023-12-21 Aisin Corporation Vehicle drive device
US12556062B2 (en) * 2021-02-12 2026-02-17 Aisin Corporation Vehicle drive device
WO2024223445A1 (fr) * 2023-04-24 2024-10-31 Sonceboz Motion Boncourt Sa Moteur électrique avec système de refroidissement

Also Published As

Publication number Publication date
WO2014195084A3 (fr) 2015-06-18
DE102013210559A1 (de) 2014-12-11

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