High clocking rate frequency converter has silicon carbide Schottky free-running diodes, current valves controlled by switching frequency above 20 kHz, matched filter corner frequency

摘要

The device has a controlled inverter (3) with hard switching power semiconducting switches that can be switched off as current valves (3a,..), each with an associated free-running diode (4a,..), whereby the inverter is followed by an output filter (5). Silicon carbide Schottky diodes are provided as free-running diodes, the current valves of the inverter are controlled with a switching frequency above 20 kHz and the corner frequency of the output filter is matched to the switching frequency. The device has a controlled inverter (3) with hard switching power semiconducting switches that can be switched off as current valves (3a,..), each with an associated free-running diode (4a,..), whereby the inverter is followed by an output filter (5). Silicon carbide Schottky diodes are provided as free-running diodes, the current valves of the inverter are controlled with a switching frequency above 20 kHz and the corner frequency of the output filter is matched to the switching frequency. AN Independent claim is also included for the following: a method of reducing switching losses of a frequency converter and method of reducing filter costs.