Cooling system for a drive device for cooling and / or lubricating thermal consumers, rotor, electrical machine and drive device

Abstract

The invention relates to a cooling system (135) for a drive device (100) of a vehicle (105) for cooling and / or lubricating thermal consumers (200), comprising a controllable fluid supply (205) for at least indirectly conveying a coolant and / or lubricant from a fluid sump (210) to the consumers (200), wherein a filter device (225) for filtering particles (520) from the coolant and / or lubricant by means of cyclone separation is arranged in the fluid circuit (220) of the cooling system (135). The invention further relates to a rotor (505) with a hydrocyclone, an electric machine (115) with such a rotor (505), and a drive device (100).

Description

[0001] The present invention relates to a cooling system for a drive device of a vehicle, in particular a hybrid or electric vehicle, a rotor which can be thermally coupled to such a cooling system, an electric machine with a stator and a rotor, and a drive device.

[0002] A vehicle includes a drive mechanism that mechanically acts on a drive wheel to propel the vehicle. The drive mechanism can be driven either by an internal combustion engine or an electric motor. Cooling of the drive mechanism's lubrication can be achieved by a cooling system, which typically uses oil as a coolant and / or lubricant.

[0003] Filter systems in previously known drive systems are based on suction or pressure filter systems with integrated filter elements, which generate pressure drops depending on the viscosity of the fluid and the filter load. In a drive system, contamination is initially introduced into the system through impurities during manufacturing and assembly, as well as wear during distribution. Solids or particles are captured in a fluid and transported or distributed throughout the system. Dirt residues or other particles often remain in the fluid circuit and are retained by a filter element, such as an oil filter, until the filter element is replaced during maintenance or repair work.

[0004] US 2020 / 368784 A1 discloses a device for separating smaller particles from larger particles by means of cyclone separation. The device comprises a feed tube having an upper end for receiving material to be separated and defining a first channel for transporting the material to a lower end of the feed tube. The device further comprises a separation chamber with a curved wall, a first opening arranged at an upper end of the separation chamber, and a second opening arranged at a lower end of the separation chamber. The separation chamber surrounds the feed tube, forming a second channel between the feed tube and the curved wall. The feed tube and the separation chamber are also arranged concentrically.The device also includes an air inlet unit arranged to supply air to the second opening of the separation chamber, and an outlet unit arranged to receive air and separated material from the first opening of the separation chamber and to discharge the air and separated material. The curved wall is conically shaped and tapers from the second opening to the first opening.

[0005] One object of the invention is to provide a cooling system and a rotor with an improved filter device, wherein the filter device, in particular, has reduced maintenance requirements. The invention achieves this object by means of the subject matter of the independent claims. Subclaims specify preferred embodiments.

[0006] According to a first aspect of the invention, a cooling system for a drive device of a vehicle for cooling and / or lubricating thermal consumers comprises a controllable fluid supply for at least indirectly conveying a coolant and / or lubricant from a fluid sump to the consumers, wherein a filter device for filtering particles from the coolant and / or lubricant by means of cyclone separation is arranged in the fluid circuit of the cooling system.

[0007] A coolant or lubricant used by the cooling system can, in particular, comprise oil. The coolant or lubricant can be used both for lubricating and for cooling elements of the drive device, an electrical machine, or other components or devices of the vehicle. In particular, a winding head or a stator winding of the electrical machine can be cooled using the coolant or lubricant. A bearing of the electrical machine or, for example, of a transmission of the drive device can be lubricated using the same coolant or lubricant. An internal combustion engine, a clutch, or another element of the drive device, if present, can also be cooled and / or lubricated using the coolant or lubricant. These and other components mentioned below are to be understood as thermal consumers within the meaning of the invention.

[0008] The term "at least indirectly" in this context means that additional components can be arranged between the fluid sump and the fluid supply and / or between the fluid supply and the thermal consumers, which can, if necessary, further influence the fluid flow. This can be a pump, a sensor, or other components relevant to the cooling system. These can be arranged in or on channels, lines, or pipes of the fluid circuit. Alternatively, a direct fluidic connection can exist between the fluid sump and the fluid supply and / or between the fluid supply and the thermal consumers.

[0009] The filter device is designed in the form of a hydrocyclone. A filter device, or hydrocyclone, is a device for separating solids or fluids from a liquid mixture—in this case, the coolant or lubricant—using centrifugal force. The process by which a hydrocyclone separates particles is called hydrocyclone separation. This is understood by the term "filtration of particles from the coolant or lubricant using cyclone separation."

[0010] The basic structure of the filter device or hydrocyclone consists of a cylindrical or conical housing, which has a generally tangential inlet on one side for the supply of coolant or lubricant. An axial supply of coolant or lubricant is also conceivable if the housing of the filter device is arranged in a rotating manner. The supplied coolant or lubricant flow creates a circular movement in which the coolant or lubricant flows in a spiral pattern and a centrifugal force is generated. Alternatively, the rotating housing can create the circular movement of the coolant or lubricant, which creates the centrifugal force. This centrifugal force causes the particles to be pushed towards the housing wall, creating a separation between the particles and the coolant or lubricant based on their density and size.A vortex forms inside the filter device, known as a swirl or fluidized bed. In this vortex, the lighter particles, especially air particles, are drawn toward the center of the hydrocyclone, while the heavier particles, i.e., larger and denser particles, migrate toward the housing wall. The separated particles collect on the housing wall and can be collected or discharged. The filtered coolant or lubricant leaves the filter device at the outlet side or at the opposite side of the filter device relative to the inlet.

[0011] Hydrocyclones are highly robust and comparatively effective. The filter device maintains constant operating conditions for cooling or lubricating consumers. It exhibits no or lower pressure fluctuations compared to other filter elements and is comparatively simple and therefore cost-effective to manufacture. The filter device can be specifically designed for applications in drive units without hydraulic switching elements and friction clutches. Furthermore, the filter device can be installed in rotating components, as the resulting rotational forces can be utilized for the desired function of the filter device for cyclone separation.

[0012] The filter device can be arranged at different points in the fluid circuit. The cooling system, in particular the fluid circuit, is designed depending on the area of ​​application. The filter device can be advantageously used in both dry sump and wet sump applications. The filter device can be operated with either a constant volume flow or a variable volume flow. The behavior of the filter device, in particular its throughput, can be influenced by actively controlling the fluid supply, in particular a pump or pump system, by varying the volume flow through the filter device. The filter device can also be fully integrated into a drive device or combined as a subsystem with a separate drive device, operatively connected, or thermally coupled.

[0013] According to one embodiment, the filter device is arranged upstream of the thermal consumers in the fluid circuit, in the direction of flow of the coolant and / or lubricant. This allows a filtered coolant or lubricant to be provided to the thermal consumers, which is advantageous for consumers that are sensitive to particles.

[0014] Alternatively, the filter device is arranged downstream of the thermal consumers in the fluid circuit in the conveying direction of the coolant and / or lubricant. In particular, the coolant or lubricant flows back through the filter device into a fluid sump after the thermal consumers, where it is made available for recirculation into the fluid circuit. This allows the coolant or lubricant to be filtered or freed of particles before it returns to the fluid sump.

[0015] Furthermore, alternatively, the fluid circuit has a secondary circuit in which the filter device is operatively arranged, wherein the coolant and / or lubricant can be conveyed from the fluid supply via the filter device into the fluid sump. The fluid circuit can therefore have a main flow and a secondary flow, wherein a first portion of the coolant or lubricant is conveyed via the main flow from the fluid supply to the thermal consumers, from where it can flow out or return to the fluid sump. Downstream of the fluid supply, a branch is provided, from where a second portion of coolant or lubricant can be diverted from the main flow into the secondary flow and filtered by means of the filter device in order to separate unwanted particles by means of cyclone separation.

[0016] The cooling system with the aforementioned filter device can advantageously be used in a drive device for a vehicle. In this sense, a drive device for a vehicle comprises a cooling system according to the first aspect of the invention. The drive device can, in particular, comprise an electric drive axle or an electric drive train for an axle of the hybrid or electric vehicle. The drive device is therefore an electric drive device. The drive device can comprise an optional transmission in order to convert torque provided by the electric machine to drive at least one drive wheel of the hybrid or electric vehicle. In addition to the electric machine, an electrical control device can also be included, which in one embodiment can also be cooled by means of coolant or lubricant of the cooling system.The drive device may further comprise an energy storage device that supplies the electric machine with electrical energy.

[0017] According to a second aspect of the invention, a rotor for an electric machine of a drive device of a vehicle, in particular a hybrid or electric vehicle, comprises a concentric filter device for filtering particles from a coolant and / or lubricant by means of cyclone separation. The rotor comprises stacked rotor laminations, which are designed such that the filter device is arranged therein, i.e. spatially within the laminated core formed by the laminations. The sum of all rotor laminations thus delimits an installation space for accommodating the filter device. A housing of the filter device can rest against the inner surface of the laminated core and be arranged in a rotationally fixed manner, such that rotation of the rotor causes the filter device or its housing to be entrained. The filter device can be designed and arranged in the rotor in such a way that it is removable and variable in design.

[0018] The filter device is configured to be connected on the inlet side to a fluid supply of a cooling system for a drive device of a vehicle for cooling and / or lubricating thermal consumers, and to be fluidly connected at least indirectly to the thermal consumers of the drive device on the outlet side. The electric machine, in particular the rotor, can already be a thermal consumer within the meaning of the invention. Thus, the passage of the coolant or lubricant through the filter device, with the associated implementation of the hydrocyclone separation, directly cools the rotor.

[0019] With such a hydrocyclone-type filter device, the performance and efficiency of cooling or lubrication of the drive system can be increased by reducing pressure losses in the cooling system. Furthermore, system efficiency can be maintained constant throughout the service life of the rotor or electric machine. With proper design, the filter device can be essentially maintenance-free and its properties can remain essentially constant throughout its entire service life.

[0020] Preferably, an inlet side of the filter device is designed and arranged with an inlet for coolant and / or lubricant at one axial end of the rotor, wherein an outlet side of the filter device is designed and arranged with an outlet for coolant or lubricant at the opposite axial end of the rotor. The filter device thus extends axially from one end of the rotor, at which the coolant or lubricant is fed into the rotor, to the other end, at which the coolant or lubricant is fed out of the rotor. The longitudinal and rotational axis of the filter device lies on the rotational axis of the rotor. The inlet and the outlet can each be designed as a line, in particular as a pipe or hose.

[0021] The filter device can filter dirt particles regardless of their size, shape, or material properties, as centrifugal forces force them against the wall of the filter device at an axial position of the rotor or filter device. Since separation is based on the density and size of the particles, the filter device can also effectively separate different fluids, such as water and oil.

[0022] The filter device or the housing of the filter device has a certain size so that a certain volume of coolant or lubricant can be accommodated. The filter device is therefore also designed to accommodate a portion of the total volume of the cooling system so that friction effects on rotating parts can be avoided. In other words, such a filter device can be used for a dry sump system, with a pump arranged upstream and downstream of the rotor in the flow direction of the coolant or lubricant, and the filter device, in addition to its particle separation function, also fulfilling the function of a reservoir in a dry sump system. The filter device thus also functions as a reservoir for the dry sump system.

[0023] Preferably, a wall delimiting the interior of the filter device has a cross-section that tapers from the inlet side to the outlet side. In other words, the housing of the filter device has a substantially conical internal geometry, with the widest cross-section or the largest internal diameter on the inlet side of the filter device and the smallest cross-section or smallest internal diameter on the outlet side. The coolant or lubricant is arranged and guided radially and spatially within the wall. The rotation of the rotor transfers rotational forces to the coolant or lubricant, wherein due to the conical shape of the interior of the filter device which accommodates the coolant or lubricant, particles from the coolant or lubricant are first drawn towards the wall and then along the wall to the largest cross-section orthe radially outermost point of the interior of the filter device's housing. At this point, the separated particles, or those separated from the coolant or lubricant, can remain or, if necessary, be removed or discharged. Thus, a controlled separation and collection of particles separated from the coolant or lubricant can take place at a defined location in the system.

[0024] In this sense, a further development of the invention provides that the filter device comprises a collecting device for receiving particles filtered out of the coolant or lubricant. In principle, the collecting device, which is designed in a simple form as a separator vessel, dirt reservoir, or the like, can be arranged at any location on the filter device and connected to its fluid-carrying interior in such a way that the particles can be collected for the system with as little loss as possible.

[0025] In this context, it is advantageous if the collection device is located near the inlet side of the filter device. In other words, the collection device is located in the area with the largest internal cross-section, since this is where the most particles tend to be collected. Retention of particles in the collection device can be achieved using a filter element, magnetic means, or a chamber system for spatial separation.

[0026] The collecting device can be dispensed with as long as the fluid supply is robust against particles in the drive device.

[0027] The filter device preferably has a vent line that is fluidly connected to the fluid-carrying interior of the filter device. Air particles separated from the coolant or lubricant, or separated by the centrifugal force, can be selectively collected and removed via the vent line.

[0028] Preferably, a vent line is arranged concentrically within the drain. The vent line can be an additional pipe through which air particles can be transported out of the system. At high rotation speeds, an air channel forms on the axis of rotation, with the vent line lying on the axis of rotation to collect and discharge the air. The vent line is arranged concentrically to the drain, with the outer diameter of the preferably tubular vent line being smaller than an inner diameter of the drain so that filtered or purified coolant or lubricant can be passed on to the consumers. The vent line can be led to an outside atmosphere. Alternatively, the vent line can be led to a consumer that is resistant to foamed coolant or lubricant residues or increased air content at high speeds.

[0029] According to a third aspect of the invention, an electric machine for a drive device of a vehicle, in particular a hybrid or electric vehicle, comprises a stationary stator and a rotor arranged rotatably relative to it according to the second aspect of the invention. In addition to the aforementioned rotor laminations, the rotor further comprises a rotor shaft, which can be connected to the laminated core in a rotationally fixed manner, as well as balancing disks. The stator is connected to the housing in a rotationally fixed manner or is mounted stationary on the housing.

[0030] An electric machine is understood, for example, to be a traction machine for a vehicle, which comprises a stator and a rotor. The electric machine can be designed, for example, as a synchronous machine or an asynchronous machine. The invention relates in particular to an electric machine designed as an internal rotor, in which the rotor is arranged radially inside the stator and the filter device is integrated into or arranged within the rotor.

[0031] According to a fourth aspect of the invention, a drive device for a vehicle, in particular a hybrid or electric vehicle, comprises an electric machine according to the third aspect of the invention. Reference is made to the above statements regarding the drive device, which are analogously applicable to the drive device according to the invention.

[0032] The above definitions and statements regarding technical effects, advantages, and advantageous embodiments of the cooling system according to the invention according to the first aspect of the invention also apply mutatis mutandis to the rotor according to the invention according to the second aspect of the invention, to the electric machine according to the invention according to the third aspect of the invention, and to the drive device according to the invention according to the fourth aspect of the invention, and vice versa. It is understood that the features mentioned above and those to be explained below can be used not only in the respective combinations specified, but also in other combinations or on their own, without departing from the scope of the present invention.

[0033] The invention will now be described in more detail with reference to the accompanying figures, in which: Fig. 1 a vehicle with a drive device according to the invention and a cooling system according to the invention according to a first embodiment; Fig. 2 a highly schematic representation of the cooling system according to Fig. 1; Fig. 3 is a highly schematic representation of the cooling system according to a second embodiment; Fig. 4 is a highly schematic representation of the cooling system according to a third embodiment; and Fig. 5 is a highly schematic representation of a rotor according to the invention of an electrical machine according to the invention for a drive device according to a fourth alternative embodiment; wherein identical or similar elements or components are provided with the same reference numerals.

[0034] Fig. 1 shows a drive device 100 according to the invention in a vehicle 105 according to the invention, which can be designed as an electric or hybrid vehicle. Depending on the configuration of the vehicle 105, it can be driven either purely electrically or partially electrically and partially by an internal combustion engine. The drive device 100 is configured to drive at least one drive wheel 110 of the vehicle 105. For this purpose, an electric machine 115 can be provided, which can be operated by means of a power converter 120 from an electrical energy storage device 125. While the power converter 120 can be included in the drive device 100, the energy storage device 125 is usually part of the vehicle 105. A transmission 130 can also be provided to convert mechanical energy to the drive wheel 110. Optionally, the transmission 130 is configured to be driven by a further drive machine (not shown), for example a reciprocating piston engine.Furthermore, a differential (not shown here) may be provided to transmit the drive power to both drive wheels 110 of the axle and optionally to one wheel or the wheels of another axle of the vehicle 105.

[0035] In Fig. 1, a cooling system 135 according to the invention is indicated, which is described in more detail in the Fig. 2 to 4 in three different embodiments.

[0036] The cooling system 135 is configured to supply thermal consumers 200 of the drive device 100 with coolant and lubricant, hereinafter referred to as "fluid," in order to cool and / or lubricate these devices or components. The thermal consumers 200 are in the Fig. 2 to 4 are simplified into a rectangle. In the following, it is assumed that a low-viscosity oil is used as the fluid. Water or other specific coolants are also conceivable. For example, the fluid can be used to lubricate the electric machine 115 and the transmission 130, and also to cool the electric machine 115 and, if applicable, the power converter 120. In another embodiment, not described here, the power converter 120 is cooled by means of a separate fluid system to achieve a lower temperature.

[0037] The cooling system 135 comprises a fluid supply 205, for example in the form of a pump or a pump system, for conveying the fluid from an upstream fluid sump 210 to the consumers 200. The fluid supply 205 is controllable, in particular in terms of its output, by a control device 215. Furthermore, the cooling system 135 has a filter device 225 arranged in the fluid circuit 220 of the cooling system 135 for filtering particles from the fluid. The filter device 225 separates unwanted particles by means of cyclone separation. In this case, the filter device 225 is a hydrocyclone.

[0038] In the Fig. 2 to 4, the filter device 225 is arranged substantially perpendicularly or vertically, with a housing 230 of the filter device 225 being arranged in a rotationally fixed manner, and the fluid being conveyed tangentially into the filter device 225 to perform the hydrocyclone separation or to separate particles, air, and / or unwanted fluid components from the fluid by utilizing centrifugal force. These particles can be collected and retained in a collecting device 235. In this case, the particles fall downward into the collecting device 235 by gravity.

[0039] The position of the filter device 225 in the hydraulic cooling system 135 is variable and, in principle, freely selectable. In the first embodiment according to Fig. 2, the filter device 225 is arranged in the conveying direction of the fluid upstream of the thermal consumers 200 in the fluid circuit 220. Thus, the filter device 225 is connected upstream of the consumers 200. In a second embodiment according to Fig. 3, the filter device 225 is arranged in the conveying direction of the fluid after the thermal consumers 200 in the fluid circuit 220. Thus, the filter device 225 is arranged downstream of the consumers 200. In a third embodiment according to Fig. 4, the fluid circuit 220 is divided into a main circuit 400 or main flow and a secondary circuit 405 or secondary flow, wherein the main circuit 400 is provided for supplying fluid to the thermal consumers 200 and the secondary circuit 405 is used as a filter bypass. Accordingly, the filter device 225 is effectively arranged in the secondary circuit 405 and thus functions as a bypass filter. The fluid from the fluid supply 205 is partially filtered via the filter device 225 in the secondary circuit 405 of the fluid circuit 220 and then flows directly back into the fluid sump 210. The other part of the fluid is conveyed via the main circuit 400 to the thermal consumers 200, from where it subsequently flows into the fluid sump 210.

[0040] In a fourth embodiment of the invention, according to Fig. 5, the electric machine 115 is shown. This example is intended to illustrate that the principle of hydrocyclone filtration can also be applied within rotating elements of the drive device 100. The electric machine 115 comprises a stationary stator 500 and a rotor 505 arranged rotatably thereto. Spatially within the rotor 505, the filter device 225 is arranged concentrically thereto. This means that a central axis of a fluid-conducting interior space 510 of the filter device 225 is arranged coaxially to a rotational axis 515 of the rotor 505. The rotor 505 and the filter device 225 are arranged horizontally in the present case. In the illustration according to Fig. 5, the flow direction of the fluid is from left to right, whereby particles 520 can be separated from the fluid - not shown here - by means of cyclone separation.

[0041] In the present case, an inlet side of the filter device 225 is designed and arranged with a tubular, axial inlet 525 for the fluid at the left axial end of the rotor 505. An outlet side of the filter device 225 is designed and arranged opposite thereto with a tubular, axial outlet 530 at the right axial end of the rotor 505. A wall 535 delimiting the interior 510 of the filter device 225, which can be designed as an outer wall of the housing 230 of the filter device 225, has a cross-section that tapers from the inlet side, i.e., from the left, to the outlet side, i.e., to the right.

[0042] In other words, the housing 230 and the interior 510 of the filter device 225 are funnel-shaped.

[0043] The rotation of rotor 505, structural measures, and optimized fluid flow cause the fluid to rotate within filter device 225. The resulting centrifugal force is used to separate particles, air, or fluid components and push them radially outward toward wall 535. Due to the contour of wall 535, the particles and other solids migrate toward the maximum cone diameter, in this case to the left toward the inlet side. A collecting device 235 is arranged in this area of ​​filter device 225, which can collect and store the separated particles and, if necessary, remove them.

[0044] In this case, the outlet 530 spatially accommodates a tubular vent line 540. The vent line 540 is arranged coaxially with the outlet 530. Air or air particles can be separated via this additional pipe in the outlet 530 and, in particular, discharged in the form of highly foamed fluid. At high rotational speeds of the rotor 505, a central air channel forms, into which the vent line 540 extends. The vent line 540 can be routed to a thermal consumer that places low demands on the condition of the coolant or lubricant. Accordingly, the possibly foaming fluid or fluid with an increased air content taken in via the vent line 540 can be routed to a thermal consumer. Reference symbol 100 drive device 105 vehicles 110 drive wheel 115 electric machine 120 power converters 125 energy storage units 130 gearboxes 135 Cooling system 200 thermal consumers 205 Fluid supply 210 Fluid sump 215 Control device 220 Fluid circuit 225 filter device 230 housings 235 Reception facility 400 main circuit 405 secondary circulation 500 stator 505 Rotor 510 Interior of the filter device 515 Rotation axis 520 particles 525 inlet 530 Expiry 535 Wall of the filter device 540 vent line QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] US 2020 / 368784 A1

[0004]

Claims

[1] Cooling system (135) for a drive device (100) of a vehicle (105) for cooling and / or lubricating thermal consumers (200), comprising a controllable fluid supply (205) for at least indirectly conveying a coolant and / or lubricant from a fluid sump (210) to the consumers (200), wherein a filter device (225) for filtering particles (520) from the coolant and / or lubricant by means of cyclone separation is arranged in the fluid circuit (220) of the cooling system (135). [2] Cooling system (135) according to claim 1, wherein the filter device (225) is arranged in the conveying direction of the coolant and / or lubricant upstream of the thermal consumers (200) in the fluid circuit (220). [3] Cooling system (135) according to claim 1, wherein the filter device (225) is arranged in the conveying direction of the coolant and / or lubricant after the thermal consumers (200) in the fluid circuit (220). [4] Cooling system (135) according to claim 1, wherein the fluid circuit (220) has a secondary circuit (405) in which the filter device (225) is operatively arranged, wherein the cooling and / or lubricating agent can be conveyed from the fluid supply (220) via the filter device (225) into the fluid sump (210). [5] Rotor (505) for an electric machine (115) of a drive device (100) of a vehicle (105), in particular a hybrid or electric vehicle, comprising a concentric filter device (225) for filtering particles (520) from a coolant and / or lubricant by means of cyclone separation. [6] Rotor (505) according to claim 5, wherein an input side of the filter device (225) is designed and arranged with an inlet (525) for coolant and / or lubricant at one axial end of the rotor (505), and wherein an output side of the filter device (225) is designed and arranged with an outlet (530) for coolant and / or lubricant at the opposite axial end of the rotor (505). [7] Rotor (505) according to claim 6, wherein a wall (535) delimiting the interior of the filter device (225) has a cross-section tapering from the inlet side to the outlet side. [8] Rotor (505) according to one of claims 5 to 7, the filter device (225) further comprising a collecting device (235) for receiving filtered-out particles (520) from the coolant and / or lubricant. [9] Rotor (505) according to claim 8 in conjunction with claim 7, wherein the collecting device (235) is arranged in the region of the inlet side of the filter device (225). [10] Rotor (505) according to one of claims 6 to 9, wherein a vent line (540) is arranged concentrically within the outlet (530). [11] Electric machine (115) for a drive device (100) of a vehicle (105), in particular a hybrid or electric vehicle, comprising a stationary stator (500) and a rotor (505) arranged rotatably thereto according to one of the preceding claims. [12] Drive device (100) for a vehicle (105), in particular a hybrid or electric vehicle, comprising an electric machine (115) according to claim 11.

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