Modulator for a hybrid converter system

A method for modulating a voltage output of a hybrid converter system having a first set of silicon (Si)-based power electronic devices coupled to a first voltage source, a second set of Si-based power electronic devices coupled to a second voltage source, and a first set of silicon-carbide (SiC)-based power electronic devices coupled to the first and second sets of Si-based power electronic devices, the method comprising:

• switching on one of the Si-based power electronic devices from each of the first and second sets of Si-based power electronic devices and one of the SiC-based devices from the first set of SiC-based power electronic devices;
• switching off the remaining Si-based power electronic devices and the remaining SiC-based power electronic devices;
• and
• switching an operational state of the hybrid converter system based on a desired voltage output by alternating which Si-based power electronic devices and SiC-based power electronic devices are switched on and off,
• wherein each SiC-based power electronic device of the first set of SiC-based power electronic devices switches only at switching frequency of one kilo-Hertz (kHz) or greater and each Si-based power electronic device of the first and second sets of Si-based power electronic devices switches only at a fundamental frequency that is lower than the switching frequency.