DE102022123943A1 - DRIVE UNIT, TRANSMISSION UNIT AND VEHICLE - Google Patents

Abstract

The invention relates to a drive unit with a first electric motor and a second electric motor, the first electric motor having a resolver and the first electric motor and the second electric motor being mechanically coupled to one another.

Description

The invention relates to a drive unit, a transmission unit and a vehicle.

Electric drives, i.e. electric motors, are installed in many vehicles today in order to reduce emissions, at least during operation. When operating vehicles, it is necessary to obtain higher performance or to install several electric motors in order to be able to operate them together when higher performance requirements are required. However, when using two or more electric motors, it is necessary that the position of the respective rotors is known. This requires either special and expensive components and/or complex controls.

The present invention is based on the object of providing an improvement or an alternative to the prior art.

According to a first aspect, the stated task solves a drive unit with a first electric motor and a second electric motor, wherein the first electric motor has a resolver and wherein the first electric motor and the second electric motor are mechanically coupled to one another.

• Es sei ausdrücklich darauf hingewiesen, dass im Rahmen der hier vorliegenden Patentanmeldung unbestimmte Artikel und unbestimmte Zahlenangaben wie „ein...“, „zwei...“ usw. im Regelfall als mindestens-Angaben zu verstehen sein sollen, also als „mindestens ein...“, „mindestens zwei...“ usw., sofern sich nicht etwa aus dem Kontext oder dem konkreten Text einer bestimmten Stelle ergibt, dass etwa dort nur „genau ein...“, „genau zwei...“ usw. gemeint sein soll. Weiterhin sind alle Zahlenangaben sowie Angaben zu Verfahrensparametern und/oder Vorrichtungsparametern im technischen Sinne zu verstehen, d.h. als mit den üblichen Toleranzen versehen zu verstehen. Auch aus der expliziten Angabe der Einschränkung „wenigstens“ oder „mindestens“ o.ä. darf nicht geschlossen werden, dass bei der einfachen Verwendung von „ein“, also ohne die Angabe von „wenigstens“ o.ä., ein „genau ein“ gemeint ist.

The following is explained conceptually:

• It should be expressly pointed out that in the context of the present patent application, indefinite articles and indefinite numbers such as "one...", "two..." etc. should generally be understood as at least information, i.e. as "at least one ...", "at least two..." etc., unless the context or the specific text of a particular passage shows that there is only "exactly one...", "exactly two..." etc. should be meant. Furthermore, all numerical information as well as information on process parameters and/or device parameters are to be understood in the technical sense, that is to say as provided with the usual tolerances. Even from the explicit specification of the restriction “at least” or “at least” or similar, it should not be concluded that the simple use of “a”, i.e. without specifying “at least” or similar, means “exactly one”. " is meant.

A resolver is a measuring instrument that is used to determine the angular position and speed of a rotor. This is a particularly robust design of the angle encoder. This sits directly on the motor shaft and records its rotation. The position of the rotor is determined using the resolver.

The two electric motors, i.e. the first and second electric motors, can provide the same or different services. With the same electric motors, the electric motors can be controlled simultaneously or alternately, so that one can be replaced by the other or at a certain temperature of the first or second electric motor, the second or first electric motor is controlled in order to protect the first or second electric motor. If electric motors of different power are installed, they can be controlled depending on requirements or operating mode.

The mechanical coupling is to be understood as meaning that the first electric motor and the second electric motor are connected to one another in such a way that they are always connected during movement. Accordingly, the angular position of the rotor of the second electric motor can be deduced based on the angular position of the rotor of the first electric motor.

The mechanical coupling can be arranged on the respective shafts of the rotors of the first electric motor and the second electric motor. This is particularly advantageous because the coupling can be easily created at this point.

This means there is no need for a complicated control system or a second resolver. This optimizes the installation space of the drive unit and reduces the costs for the drive unit.

It is conceivable that the mechanical coupling is a gear transmission.

The gear transmission is attached to the shafts of the respective rotors of the first and second electric motors and couples them mechanically. The electric motors therefore move in synchronism or depending on which electric motor is being driven, the other one moves with it. Both electric motors can be driven or one of the electric motors is driven and the other runs at idle.

Within the scope of the invention, it is conceivable that the gear ratio is 1:1 or 1:1.5 or 1:2 or 0.8:1 or 0.5:1.

The choice of the gear ratio between the first electric motor and the second electric motor depends on the size of the two electric motors, their respective use and the desired speed of the respective electric motor.

Furthermore, it is conceivable that a data interface is provided, with the data interface point is designed to connect the drive unit to a control unit for data communication.

This is particularly advantageous for controlling the electric motors. Furthermore, the control, in particular the vehicle control, can record operating data of the electric motors via the interface and, for example, feed this back to the user. Furthermore, the angular position of the first electric motor can be detected and the angular position of the second electric motor can be determined.

Data communicating here means that a radio connection or a cable connection is provided between the interface and the control unit.

Furthermore, it is conceivable that the data interface is designed to drive the first electric motor and/or the second electric motor by means of the control unit. It can be passed on that only one of the electric motors is being driven and the other is idling, or that both are running at the same time.

Within the scope of the invention, it is conceivable that the first electric motor and/or the second electric motor have a jacket for heat exchange. This allows the electric motor to be cooled, which, on the one hand, stabilizes the performance and, on the other hand, increases the service life of the respective electric motor. To control the cooling, temperature sensors are provided in the electric motors, which allow adapted cooling. The data from the temperature sensors is passed on to the control unit via the interface.

Furthermore, it is conceivable that at least one element of the gear transmission is designed as a receptacle for additional drive elements.

The installation space can be used to save space. Furthermore, components for driving electric motors can be saved. This in turn reduces the cost of the drive unit.

According to a second aspect of the invention, the problem solved is a transmission unit with a transmission housing, an interface for controlling the transmission unit by a control unit and a transmission comprising a plurality of gears, the transmission housing being designed to accommodate a drive unit described above.

Within the scope of the invention, it is conceivable that at least one of the gears of the plurality of gears of the transmission is arranged on an element of the gear transmission of the drive unit.

The installation space can be used to save space. Furthermore, components for driving electric motors can be saved. This in turn reduces the cost of the drive unit.

According to a third aspect of the invention, the problem solved is a vehicle with a transmission unit described above.

• 1 schematische Darstellung einer erfindungsgemäßen Antriebseinheit,
• 2 schematische Darstellung einer Getriebeeinheit,
• 3 schematische Darstellung eines Fahrzeuges.

The invention will be explained in more detail below using exemplary embodiments with reference to the drawings. Show there

• 1 schematic representation of a drive unit according to the invention,
• 2 schematic representation of a gear unit,
• 3 schematic representation of a vehicle.

In 1 a drive unit 1 with a first electric motor 2 and a second electric motor 4 is shown. The first electric motor 2 has a resolver 3. The first electric motor 2 and the second electric motor 4 are mechanically coupled to one another. The mechanical coupling of the two electric motors 2, 4 enables the angular position of both electric motors 2, 4 to be determined with just one resolver 3.

The mechanical coupling shown here is a gear ratio 5 with a ratio of 1:1. In the present exemplary embodiment, two identical electric motors 2, 4 are installed. The translation ensures synchronization of the two electric motors 2, 4.

A data interface 6 is provided for controlling and/or regulating the drive unit 1. The data interface 6 is designed to connect the drive unit 1 to a control unit 7 for data communication. The control unit 7 can be a vehicle control 7, for example. This enables the first electric motor 2 and/or the second electric motor 4 to be controlled, with the electric motors 2, 4 being controlled and driven individually or together.

In order to ensure safe operation of the first electric motor 2 and the second electric motor 4, the first electric motor 2 and/or the second electric motor 4 have a jacket 8 for heat exchange.

For a space-saving design of the drive unit 1, at least one element of the gear transmission 5 is designed as a receptacle 9 for additional drive elements.

In 2 is the transmission unit 10 with a transmission housing 14, a data interface 6 for controlling the transmission unit 10 by a control unit 7 and a transmission 11 comprising a plurality of gears 12, the transmission housing 14 being designed to be a drive unit 1 according to 1 to record.

At least one of the gears 12 of the plurality of gears 12 of the transmission 11 is received by an element of the gear transmission 5 of the drive unit 1. This enables a space-saving design that is easy to handle.

In 3 is a vehicle 13 with a transmission unit 10 according to 2 shown.

The embodiments shown here represent only examples of the present invention and should therefore not be construed as limiting. Alternative embodiments contemplated by those skilled in the art are equally included within the scope of the present invention.

List of reference symbols used

1

Drive unit

2

first electric motor

3

resolver

4

a second electric motor

5

Gear translation

6

Data interface

7

Control unit, vehicle control

8th

Coat

9

Recording

10

Gear unit

11

transmission

12

Gears

13

vehicle

14

Gearbox housing

Claims (10)

Drive unit (1) for a vehicle, the vehicle belonging to the group of commercial vehicles, special vehicles and mobile work machines, with a first electric motor (2) and a second electric motor (4), the first electric motor (2) having a resolver (3) and wherein the first electric motor (2) and the second electric motor (4) are mechanically coupled to one another. Drive unit (1). Claim 1 , characterized in that the mechanical coupling is a gear transmission (5). Drive unit (1). Claim 2 , characterized in that the gear ratio (5) is 1:1 or 1:1.5 or 1:2 or 0.8:1 or 0.5:1. Drive unit (1) according to one of the preceding claims, characterized in that a data interface (6) is provided, the data interface (6) being designed to connect the drive unit (1) to a control unit (7) in a data-communicating manner. Drive unit (1) according to one of the preceding claims, characterized in that the data interface (6) is designed to drive the first electric motor (2) and/or the second electric motor (4) by means of the control unit (7). Drive unit (1) according to one of the preceding claims, characterized in that the first electric motor (2) and/or the second electric motor (4) have a jacket (8) for heat exchange. Drive unit (1) according to one of the preceding claims, characterized in that at least one element of the gear transmission is designed as a receptacle for additional drive elements. Transmission unit (10) for a vehicle, the vehicle belonging to the group of commercial vehicles, special vehicles and mobile work machines, with a transmission housing (14), an interface (6) for controlling the transmission unit (10) by a control unit (7) and a Gear (11) comprising a plurality of gears (12), the gear housing (14) being designed to accommodate a drive unit (1) according to the preceding claims. Gear unit (10). Claim 8 , characterized in that at least one of the gears (12) of the plurality of gears (12) of the transmission (11) is arranged on an element of the gear transmission (5) of the drive unit (1). Vehicle (13), in particular a vehicle from the group of commercial vehicles, special vehicles, mobile work machines, with a Gear unit (10) according to one of Claims 8 or 9 .

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