| 摘要 |
<p>When the three U-, V-, W-phase arms (UA, VA, WA) of a DC/DC converter (36) are turned on, they are alternately turned on by gate drive signals (UH, UL, VH, VL, WH, WL). When the U-, V-, W-phase arms (UA, VA, WA) are alternately turned on, an upper arm switching device (81u) of the U-phase arm (UA), for example, is turned on, and thereafter a lower arm switching device (82u) of the U-phase arm (UA) is turned on. Thereafter, an upper arm switching device (81v) of the V-phase arm (VA) which is next to the U-phase arm (UA) is turned on, and thereafter a lower arm switching device (82v) of the V-phase arm (VA) is turned on. The upper and lower arm switching devices are thus turned on in a rotation switching process.</p> |
