Method and apparatus for determining the intermediate circuit current of a converter
AssigneeIAV GmbH Ingenieurgesellschaft Auto und Verkehr
InventorsMichael HOMANN, Faical TURKI
Life of this patent
Estimating the term…
Abstract
An intermediate circuit current of a power converter is determined as precisely as possible in a simple and inexpensive manner. The intermediate circuit current is determined as a function of a detection of the measured output voltages and output currents of the individual phases.
Claims11
A method for determining an intermediate circuit current of a power converter with switches for converting a direct voltage into an alternating voltage, comprising:
- measuring output currents of individual phases of the power converter;
- measuring output voltages of the individual phases of the power converter;
- determining switching functions of the individual phases that are assigned to the switches of the power converter;
- determining, based on the measured output voltages, potential changes of the output voltages of the individual phases from negative potential to positive potential and from positive to negative potential;
- correcting the switching functions of the individual phases as a function of the determined potential changes;
- and
- determining the intermediate circuit current as a function of the measured output currents of the individual phases of the power converter and as a function of the corrected switching functions that are assigned to the switches of the power converter.
A method for determining an intermediate circuit current of a power converter with switches for converting a direct voltage into an alternating voltage, comprising:
- measuring output currents of individual phases of the power converter;
- measuring output voltages of individual phases of the power converter;
- determining, based on the measured output voltages, potential changes of the output voltages of the individual phases from negative potential to positive potential and from positive to negative potential;
- deriving switching functions of the individual phases that are assigned to the switches of the power converter as a function of the determined potential changes;
- and
- determining the intermediate circuit current as a function of the measured output currents of the individual phases of the power converter and as a function of the derived switching functions that are assigned to the switches of the power converter.
Dependencies are inferred from the claim text.