This paper presents the experimental results of
the independent drives of two induction motors (IMs) fed by a
four-leg inverter with vector control method. The inverter
consists of four legs and two capacitors connected in a series.
Recently the four-leg inverter and four switch inverter have
been studied, but they have several disadvantages. First, the
balanced three-phase current cannot be obtained. Second, the
drift phenomenon is happened by the two capacitor voltages
fluctuation. This paper analyzes the cause of the unbalanced
three-phase current and resolves about it by vector control
method. Next, the independent drive of two IMs fed by the fourleg
inverter with the vector control method is demonstrated by
the experimental results. Moreover, comparing experimental
result and previous result, value of compensation method is
shown.