| 摘要 |
A method and apparatus for converting direct current into alternating current is disclosed. The apparatus includes a converter circuit having first and second source nodes for receiving direct current from a source and first and second load nodes for connecting a load. The circuit includes first and second switches in series between the first and second source nodes with a common first intermediate node, and third and fourth switches in series between the first and second source nodes with a common second intermediate node. A first inductor is connected between the first intermediate node and the first load node, and a second inductor is connected between the second intermediate node and the second load node. The apparatus includes a controller for causing first, second, third, and fourth switching control signals to be asserted to cause the first, second, third, and fourth switches to selectively conduct current between the first and second source nodes and the first and second load nodes to produce an alternating current, and to cause a single shunt control signal to be asserted when the switching control signals are not asserted. The apparatus includes a bidirectional current shunt connected between the first and second intermediate nodes, the current shunt including a unitary switched current path for conducting current when the shunt control signal is asserted and the switching control signals are not asserted. The current shunt is configured to bock current flow between the first and second intermediate nodes when the shunt control signal is not asserted. |
