Abstract
High-efficiency dual half-bridge converters are analyzed to
achieve a zero voltage switching (ZVS) with a wide load range for
a large sized plasma display panel (PDP) sustaining power module.
The circuit consists of the dual half-bridge configuration in a primary
side, two voltage doublers rectifiers in a secondary side, and the
ZVS tank. The ZVS operation of the primary switches can be obtained
with the ZVS tank irrespective of a load condition. In addition, although
the proposed converter does not have the output inductive filter,
a root mean square (RMS) current stress of the output capacitor can
be reduced by the complementary operation. An experimental prototype
of 900 W power converter is constructed and tested to verify the features
of the proposed converter. As a result, the proposed sustaining power
circuit can achieve more than 92% of high efficiency at 10% load condition
and the ZVS operation is achieved at the light load condition.
© 2014 IEEE
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