A single-electrical-port control scheme, for four-quadrant operation of cascaded doubly-fed
induction machine (CDFIM), which has long been conceived as a motor or generator only
suitable for limited two-quadrant operation, is proposed and theoretically demonstrated. The
drive system is configured as a master/slave architecture, that is, the power winding is
supplied with a constant-voltage constant-frequency inverter, termed as the master inverter,
in an open-loop way, while the control winding is fed by a closed-loop field-oriented …

This paper presents a dual-electrical-port control scheme for four-quadrant operation of
cascaded doubly-fed induction machine (CDFIM), which has conventionally been used as a
variable-speed drive or variable-speed constant-frequency generator for limited-speed-
range applications. The proposed control method enables the synchronous control of both
power winding (PW) and control winding (CW) currents, and as a consequence, not only the
control complexity but also the rotor slip frequency and related core losses are significantly …