Method for operating an electric machine
AssigneeRobert Bosch GmbH
InventorsChristian Freitag, Leonard Weiss
Life of this patent
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Abstract
The invention relates to a method for operating an electric machine (100) having a power converter (100) and multiple phases, in which method, phase currents flowing through the phases during operation of the electric machine (100) are determined and are used for continued operation of the electric machine (100), the phase currents being determined taking account of a fundamental wave and at least one harmonic of the current profile of each phase current.
Claims10
A method for operating an electric machine (100) comprising a power converter (110) and a plurality of phases (U1, V1, W1, U2, V2, W2), the method comprising:
- during operation of the electric machine (100), determining phase currents (IU1, IV1, IW1, IU2, IV2, IW2) flowing through the phases;
- and
- using the determined phase currents for the continued operation of the electric machine (100),
- wherein the phase currents (IU1, IV1, IW1, IU2, IV2, IW2) are determined taking into consideration a fundamental and at least one harmonic of a current characteristic of each phase current, and
- wherein the phase currents are measured at different times (t1, t2) and converted into the phase currents (IU1, IV1, IW1, IU2, IV2, IW2) for a common time (t1).
A non-transitory, computer-readable medium containing instructions that when executed by a computer cause the computer to control an electric machine (100) that include a power converter (110) and a plurality of phases (U1, V1, W1, U2, V2, W2), by:
- during operation of the electric machine (100), determining phase currents (IU1, IV1, IW1, IU2, IV2, IW2) flowing through the phases;
- and
- using the determined phase currents for the continued operation of the electric machine (100),
- wherein the phase currents (IU1, IV1, IW1, IU2, IV2, IW2) are determined taking into consideration a fundamental and at least one harmonic of a current characteristic of each phase current, and
- wherein the phase currents are measured at different times (t1, t2) and converted into the phase currents (IU1, IV1, IW1, IU2, IV2, IW2) for a common time (t1).
Dependencies are inferred from the claim text.