Current-source power converter using normally-on field effect transistors

摘要

The converter has a rectifier module (20) with switching arms connected between positive line (10) and a negative line (11) of a power bus. Each switching arm comprises upper and lower transistors (T1-T6) e.g. junction gate field-effect transistor, that are in series, where the transistors are made of a silicon carbide or gallium nitride. A normally opened auxiliary switch (SW) e.g. electromechanic relay, is connected in series with the switching arms, where the auxiliary switch is connected on the positive line of the bus. A control device (CSW) controls the auxiliary switch.