| 摘要 |
PROBLEM TO BE SOLVED: To avoid increase of output distortion or switching loss by performing current detection without prolonging a period in which a vector pattern to be adopted for a voltage type inverter is maintained, longer than an original period in which the vector pattern should be maintained.SOLUTION: A first voltage command group corresponds to a switching signal in which, during a first interval including a time point when sums of periods in which upper arm side switches in a pair of current paths of the voltage type inverter are conducted in one cycle of a carrier are equal to zero, a period in which the upper arm side switches in all the current paths are non-conducted in the one cycle is adjacently held between a pair of periods in which all the upper arm side switches in the pair of current paths are non-conducted and the other upper arm side switches are conducted.SELECTED DRAWING: Figure 2 |
