Method for operating a steering system, control unit for a steering system and steering system
AssigneeRobert Bosch GmbH
InventorsEugen Sworowski, Andreas Schramm
Life of this patent
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Abstract
The disclosure relates to a method for operating a steering system of a motor vehicle. A voltage reserve is determined as a function of a compensation trajectory for a second actuating voltage and as a function of a modulation limit. A first actuating voltage with a fundamental frequency is determined as a function of the voltage reserve. A compensation voltage with a sixth-order harmonic with respect to the fundamental frequency of the first actuating voltage is determined. The second actuating voltage is determined for an inverter as a function of the first actuating voltage and as a function of the compensation voltage.
Claims9
A method for operating a steering system (2) of a motor vehicle, wherein the method comprising:
- determining a voltage reserve based on a compensation trajectory for a second actuating voltage {right arrow over (u)}23 for an inverter and based on a modulation limit;
- determining a first actuating voltage {right arrow over (u)}dq having a fundamental oscillation based on the voltage reserve;
- determining a compensation voltage {right arrow over (u)}dq,comp having a sixth-order harmonic with respect to the fundamental oscillation of the first actuating voltage {right arrow over (u)}dq;
- and
- determining the second actuating voltage {right arrow over (u)}23 based on the first actuating voltage {right arrow over (u)}dq and based on the compensation voltage {right arrow over (u)}dq,comp.
A control device for a steering system of a motor vehicle, the control device comprising:
- at least one memory configured to store computer program code;
- and
- at least one processor configured to execute the computer program code to:
- determine a voltage reserve based on a compensation trajectory for a second actuating voltage {right arrow over (u)}23 for an inverter and based on a modulation limit;
- determine a first actuating voltage {right arrow over (u)}23 having a fundamental oscillation based on the voltage reserve;
- determine a compensation voltage {right arrow over (u)}dq,comp having a sixth-order harmonic with respect to the fundamental oscillation of the first actuating voltage {right arrow over (u)}dq;
- and
- determine the ascertains a second actuating voltage {right arrow over (u)}23 based on the first actuating voltage {right arrow over (u)}dq and based on the compensation voltage {right arrow over (u)}dq,comp.
A steering system of a motor vehicle, the steering system comprising:
- an inverter;
- a permanently excited synchronous machine;
- and
- a control device having (i) at least one memory configured to store computer program code and (ii) at least one processor configured to execute the computer program code to:
- determine a voltage reserve based on a compensation trajectory for a second actuating voltage for an inverter and based on a modulation limit;
- determine a first actuating voltage having a fundamental oscillation based on the voltage reserve;
- determine a compensation voltage having a sixth-order harmonic with respect to the fundamental oscillation of the first actuating voltage;
- and
- determine the second actuating voltage based on the first actuating voltage and based on the compensation voltage.
Dependencies are inferred from the claim text.