US 2026/0208598 A1Published application

Drive device for an electric vehicle, electric vehicle and method for operating a drive device in an electric vehicle

AssigneeValeo eAutomotive Germany GmbH

InventorsMarco ZIMMERMANN, Jingpeng GUAN

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Abstract

Drive device for an electric vehicle, including an electric machine with a stator and a rotor, and a temperature determination device. The electric machine has machine characteristics, according to which one value of a torque (T) is assigned to each operating point being a pair of values of the d- and the q-component, the power converter device being configured to receive the torque command and to determine a pair of setpoints (id*, iq*) for the d- and the q-component corresponding to one operating point that is assigned to the desired torque (T*). Upon receiving the first and second information states, the pair of setpoints is determined according to a first and second operating modes. The power converter device being configured to generate the multiphase current depending on the pair of setpoints.

Claims20

Dependent claims

Drive device for an electric vehicle, comprising:

an electric machine with a stator and with a rotor-being arranged rotatably relative to the stator;
a temperature determination device configured to determine a temperature information being representative of a temperature (ϑ) of the rotor, the temperature information having at least two information states, a first one of the information states being representative of a first temperature and a second one of the information states being representative of a second temperature being higher than the first temperature;
and
a power converter device configured to provide a multiphase current (i) to the stator, having an input for a torque command representing a desired torque (T*) to be provided by the rotor and being operable according to a first operating mode and according to a second operating mode, the multiphase current (i) being representable by a space vector with a d-component and a q-component in a rotor flux oriented coordinate system;
the electric machine having machine characteristics, according to which one value of a torque (T) provided by the rotor is assigned to each one of multiple operating points, each operating point being a pair of values of the d-component and the q-component, the power converter device being configured to receive the torque command and to determine a pair of setpoints
(
i
d
*
,
i
q
*
)
for the d-component and the q-component corresponding to one of the operating points that is assigned to the desired torque (T*), wherein, upon receiving the first information state, the pair of setpoints
(
i
d
*
,
i
q
*
)
is determined according to the first operating mode, and, upon receiving the second information state, the pair of setpoints
(
i
d
*
,
i
q
*
)
is determined according to the second operating mode, in which the setpoint
(
i
d
*
)
for the d-component has a higher value that the setpoint
(
i
d
*
)
for the d-component that is determined in the first operating mode at the desired torque (T*) and in which the setpoint
(
i
q
*
)
for the q-component has a lower value than the setpoint
(
i
q
*
)
for the q-component that is determined in the first operating mode at the desired torque (T*), wherein the power converter device is further configured to generate the multiphase current depending on the pair of setpoints
(
i
d
*
,
i
q
*
)
.

66 more elements

Method for operating a drive device in an electric vehicle, the drive device comprising:

an electric machine with a stator and with a rotor being arranged rotatably relative to the stator;
a temperature determination device;
and a power converter device configured to provide a multiphase current (i) to the stator, having an input and being operable according to a first operating mode and a second operating mode;
the multiphase current (i) being representable by a space vector with a d-component and a q-component in a rotor flux oriented coordinate system;
the electric machine having machine characteristics, according to which one value of a torque (T) provided by the rotor is assigned to each one of multiple operating points, each operating point being a pair of values of the d-component and the q-component;
the method comprising steps of:
determining, by the temperature determination device, a temperature information being representative of a temperature (ϑ) of the rotor, the temperature information having at least two information states, a first one of the information states being representative of a first temperature and a second one of the information states being representative of second temperature being higher than the first temperature;
receiving, at the input of the power converter device, a torque command representing a desired torque (T*) to be provided by the rotor;
determining, by the power converter device, a pair of setpoints
(
i
d
*
,
i
q
*
)
for the d-component and the q-component corresponding to one of the operating points that is assigned to the desired torque (T*), wherein, upon receiving the first information state, the pair of setpoints
(
i
d
*
,
i
q
*
)
is determined according to the first operating mode, and, upon receiving the second information state, the pair of setpoints
(
i
d
*
,
i
q
*
)
is determined according to the second operating mode, in which the setpoint
(
i
d
*
)
for the d-component has a higher value than the setpoint for the d-component
(
i
d
*
)
that is determined in the first operating mode at the desired torque (T*) and in which the setpoint for the q-component
(
i
q
*
)
has a lower value that the setpoint for the q-component
(
i
q
*
)
that is determined in the first operating mode at the desired torque (T*);
and
generating, by the power converter device, the multiphase current (i) depending on the pair of setpoints
(
i
d
*
,
i
q
*
)
.

72 more elements

Dependencies are inferred from the claim text.

Facts

Application: 19/140,221Filed 20 Dec 2023
Priority: DE 10 2022 134 566.122 Dec 2022
Published: 23 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification15 codes

B60L 15/025
Characterised by the form of the current used in the control circuit: using field orientation; Vector control; Direct Torque Control [DTC]
B60L 15/20
Methods, circuits, or devices for controlling the traction-motor speed of electrically-propelled vehicles: for control of the vehicle or its…
B60L 50/51
Using propulsion power supplied by batteries or fuel cells: characterised by AC-motors
H02P 21/0021
Control strategies in general, e.g. linear type, e.g. P, PI, PID, using robust control: using different modes of control depending on a parameter,…