Switchable Freewheeling Circuit for Matrix Converters
The matrix converter for converting a single or multi-phase input voltage with a variable or fixed frequency and a variable or fixed amplitude into a single or multi-phase output voltage with a variable frequency and/or amplitude is provided with at least two input connections, at least two output connections, a large number of controllable, electronic converter switches which are each arranged between the input connections and the output connections, a controllable freewheeling circuit which is arranged between the input connections and the output connections and, for each input connection, has a first and a second controllable electronic freewheeling circuit switch and, for each output connection, has a first and a second freewheeling diode. The first freewheeling circuit switches are arranged between a common first node and the respective input connections, and the second freewheeling circuit switches are arranged between a common second node and the respective input connections.
PFEIFER MARKUS [DE]; SCHROEDER GUENTER [DE]
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