Control device for current regulation of a rotary field machine of a motor vehicle, method for current regulation, drive unit and motor vehicle

摘要

The invention relates to a control device (3) for current regulation of a rotary field machine (2) of a motor vehicle, with a current regulator (4) for determining a fundamental oscillation (u1, u2, u3) of an output voltage for a respective operating point, - a control device (6) for Modulating the output voltage by driving a power converter (5) of the control device (3) based on a for the respective operating point offline-optimized pulse pattern (P), and- a current sensor (8) for sampling a harmonic resulting from the pulse pattern used (P) Output current (ir1, ir2, ir3) of the power converter (5) and for returning the sampled output current to the current regulator (4), wherein sampling times (A1, A2, A3, A4, A5, A6) for sampling the output current (ir1, ir2, ir3) are optimized offline in terms of pulse pattern and are predetermined as those times at which a deviation between the harmonic-prone output current (ir1, ir2, ir3) and a fundamental wave (i1) of the output current is smaller than a predetermined threshold. The invention also relates to a method, a drive unit (1) and a motor vehicle.