| 摘要 |
An overvoltage protection apparatus for a matrix converter has nine bidirectional power switches which are arranged in a 3x3 switch matrix. The overvoltage protection apparatus has three varistors on both the network side and the load side, which are each connected, in delta, to input and output connections of the matrix converter. A result, the overvoltage protection apparatus has considerably reduced physical volume, as a result of which the component costs for the overvoltage protection apparatus are very low.
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