부산대학교 도서관

In recent years, multiphase systems are gaining popularity from the academy and industry, thanks to the benefits they offer. Among them, star connected five-phase systems can be highlighted, as they provide considerable fault tolerant capabilities without requiring an excessive number of additional elements. As in traditional three-phase systems, five-phase systems can experience a variety of issues generated by the presence of a common mode voltage (CMV). For example, when the load is an electric machine, fast CMV variations generate unwanted shaft voltages and bearing currents, reducing the life-cycle of the motor bearings. Considering all the previous, this paper will focus on studying specific Reduced Common Mode Voltage (RCMV) pulse width modulation (PWM) techniques that can be found in the scientific literature for five-phase systems. Additionally, two novel RCMV-PWM techniques will be proposed and validated. Finally, their performance will be compared with other techniques by means of simulation.