| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a compensation method and a compensation apparatus, capable of continuously setting a voltage conversion ratio by eliminating a dead band in a four-quadrant reversible chopper circuit. <P>SOLUTION: A switch circuit of a pulse width modulation type is formed by interposing a leg with two arms, each of which has a diode connected with a semiconductor switch element in reverse parallel between a DC circuit and a ground circuit on each of an input side and an output side and by connecting a reactor between arm connection points of both legs. In the dead band which causes the semiconductor switch element in the one leg not to be turned on by constraints to a dead time Td provided to avoid short circuit in a DC circuit, a conduction ratio in the other leg is lowered from 1 and a conduction ratio in the one leg is determined to meet the conduction ratio in the other leg, thus continuously setting the voltage conversion ratio. <P>COPYRIGHT: (C)2010,JPO&INPIT |
