| 摘要 |
<P>PROBLEM TO BE SOLVED: To attain highly accurate A/D conversion of detected motor currents, when using a multi-phase chopping wave carrier in a single-shunt inverter controller. <P>SOLUTION: A PWM signal is produced based on the chopping waves Cu, Cv, Cw of respective phases shifted from each other and voltage command values of the respective phases, and interrupt signals INT3U to INT4W are produced respectively at the rising points of the PWM signals of the respective phases. At timings of the respective interrupt signals INT3U to INT4W, the A/D conversion of the motor currents of the respective phases detected by a shunt is started. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
