| 摘要 |
<p>Provided is an inverter control device capable of suppressing the noise and oscillation attributable to current ripples in an electric load. The inverter control device comprises: a two-phase modulation mode setting means (19) having a first determination means (19e) and designating a two-phase modulation mode on the basis of the output frequency (16) of an inverter; and a two-phase modulation processing means (10) for carrying out a two-phase modulation on the basis of a duty command (7) and the two-phase modulation mode. When an odd number is denoted by x, the first determination means (19e) determines whether a frequency of 3x-times the output frequency (16) of the inverter is included in a preset frequency band or not. When it is determined that the 3x-times frequency is included in the frequency band, the two-phase modulation mode setting means (19) designates an upward sliding mode or a downward sliding mode as a two-phase modulation mode. When it is determined that the 3x-times frequency is not included in the frequency band, a two-way sliding mode in which an upward sliding state and a downward sliding state are switched according to the absolute value and polarity of the duty command (7) is designated as the two-phase modulation mode.</p> |
