| 摘要 |
<P>PROBLEM TO BE SOLVED: To execute the V2 control properly in a low-loss single-side driving system. <P>SOLUTION: For calculation of a DUTY (a feed-forward term) of a pulse driving a switching element SH and a switching element SL, a DUTY operation part 72 in a controller 52 calculates the DUTY according to a first calculation method based on a voltage-rising ratio by using an observed value for a primary side voltage V1 and a secondary side voltage command value V2<SP POS="POST">*</SP>, in a successive region where a current in a reactor L is successive. The DUTY operation part 72 also predicts the maximum value of an absolute value of the current in the reactor L, and calculates the DUTY according to a second calculation method based on the prediction value by using the observed value for the primary side voltage V1, the secondary side voltage command value V2<SP POS="POST">*</SP>, and an observed value for a current Iout flowing in a load 13, in an low-electrical-power region where electrical power transferred between the load 13 and a battery 11 is reduced and the current in the reactor L is intermissive. <P>COPYRIGHT: (C)2012,JPO&INPIT |
