Operation evaluations in high speed range of wound field synchronous motor drive integrated with ZSI

This paper presents experimental evaluations of drive performances in high-speed range of a wound field synchronous motor (WFSM) drive system integrated with a z-source inverter (ZSI). The WFSM has two field coils as DC field mmf sources instead of permanent magnets. On the other hand, the ZSI employs an impedance-network that consists of two DC reactors and two capacitors. A uniqueness of the proposed drive system lies in that this system makes it possible to reduce size and cost because the two DC reactors serve as both two field coils as the DC field mmf sources in the WFSM and the DC boosting reactors in the ZSI. The comparisons of drive performances in high-speed range between the proposed integrated system and a non-integrated system are experimentally demonstrated and discussed.