| 摘要 |
<p>PURPOSE:To suppress the unequilibrium in the voltage of a load which is connected to a number-of-phase converter by connecting a resistor between a V- phase terminal and the load when the sequence of the phases of the voltage at the output side of the converter is in the order of U, V and W. CONSTITUTION:A resistor 21 is connected between a V phase of a main coil 16a in a number-of-phase converter 16 and a V phase terminal V0 of a load contactor 9. Thus, the voltage of the V-phase drops by V-V0 at the resistor 21 in response to a load current which flows through the V phase. Accordingly, the voltage vector U-V0 between the U phase and V0 phase and the voltage vector V0-W between the V0 phase and the W phase decreases in response to the load current, with the result that the unequilibrium in the voltage between the phases can be improved.</p> |
