Patent ID: 6023420
Filing Date: 2000-02-08
Classification: H02M,H02P

Abstract:
A power inverter for generating an alternating current signal at two or more output terminals relative to a neutral terminal, from a direct current signal at a power terminal relative to a ground terminal, comprisingat least four transformers each having a primary winding and a secondary winding, the primary windings of the four transformers being connected in series in a transformer ring, pairs of the secondary windings being connected in series between the neutral terminal and a respective one of the output terminals, the turns ratio between the primary and secondary winding on a first transformer being different from the turns ratio between the primary and secondary winding on a second transformer,at least four switching circuits each connected to a node between a respective pair of the primary windings in the transformer ring, the switching circuits alternately connecting the nodes to which they are connected to the power terminal and the ground terminal in response to control signals.