| Abstract |
The paper proposes a novel three-phase Zsource
ac-ac converter topology, presents its circuit
configuration, operating principle and control
method. The proposed ac-ac converter employs a
unique LC network to suppress the over-current and
surge voltage due to the shoot-through or the opencircuit
of the two switches. By controlling the duty
cycle, the Z-source can provide buck-boost function,
produce greater or less voltage than the line voltage.
As a result, the new Z-source ac-ac converter reduces
line harmonics, improves power factor and reliability.
Analysis, simulation and experimental results are
presented to demonstrate these new features. |
