Method for controlling an electric machine, control device for an electric machine and electric drive system
AssigneeRobert Bosch GmbH
InventorsMaximilian Manderla, Florian Malchow, Michele Hirsch
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Abstract
The present invention discloses a control system for an electric machine. In order to control the electric machine, predetermined frequency components are extracted from manipulated variables or measurement variables of the electric machine and are multiplied by a previously calculated control matrix. The control matrix can be calculated in advance here. Different control matrices can be formed in advance for different applications. As a result, simple efficient and robust control of the electric machine is possible, in particular for optimising and minimising harmonics.
Claims13
A method (100) for controlling an electric machine (4), the method comprising:
- detecting (110) at least one manipulated or measurement variable (P);
- ascertaining (120) components of a predetermined frequency in the at least one detected manipulated or measurement variable (P);
- calculating (130) a controlled variable (R) using the ascertained components of the predetermined frequency of the detected manipulated or measurement variable (P) and a predetermined control matrix;
- and
- driving (140) the electric machine (4) using the calculated controlled variable (R).
A control device for an electric machine (4), the device comprising:
- a first transformation unit (1) configured to ascertain components of a predetermined frequency from at least one manipulated or measurement variable (P);
- and
- a first computing unit (2) configured to calculate a controlled variable (R) using a predetermined control matrix and the ascertained components of the predetermined frequency of the manipulated or measurement variable (P).
Dependencies are inferred from the claim text.