| 摘要 |
PROBLEM TO BE SOLVED: To provide a control device which spreads a spectrum of a reactor current to a plurality of frequencies, reduces magnetostrictive noise by reducing a peak value of the spectrum and prevents a circulation current from being generated when operating a plurality of power conversion devices while connecting them in parallel.SOLUTION: In the control device for the power conversion device in which input power is converted into desired form and outputted by operating a semiconductor switching element and a reactor for filtering is provided in an output part, a carrier computing element 250 which computes a carrier of a predetermined frequency for generating a control signal of the switching element sets a carrier frequency (high ripple carrier frequency) at a phase angle which enlarges a ripple component of a current to flow to the reactor higher than a carrier frequency (low ripple carrier frequency) at a phase angle that reduces the ripple component, and computes the carrier in such a manner that the high ripple carrier frequency and the low ripple carrier frequency are alternately and continuously generated.SELECTED DRAWING: Figure 1 |
