METHOD OF CONTROLLING POWER CONVERSION DEVICE

摘要

A method of controlling a power conversion device, wherein switching loss is suppressed, voltage precision is improved, and sudden changes in noise are suppressed by switching the modulation method. An amount-of-compensation a is to be calculated in a correction-term adding unit (1), wherein the amount-of-compensationa will correspond to a signal generated by comparing the absolute values of the maximum value [max (V*)] and the minimum value [min (V*)], and selecting a [1 - max (V*)] signal when the maximum value [max (V*)] is greater, and selecting a [-1 - min (V*)] signal when the absolute value of the minimum value [min (V*)] is greater. In addition, gain k is multiplied to a signal that had the maximum value [max (V*)] added to the minimum value [min (V*)], [max (V*) + min (V*)], generating a triangular-wave shaped signal [k (max (V*) + min (V*))] that synchronizes with the amount-of-compensation a. An amount-of-compensation ß, which is generated by selecting between this triangular-wave shaped signal [k (max (V*) + min (V*))] and the amount-of-compensation a, the one with a smaller absolute value, is added to the voltage command values V*U, V*V, and V*W.