RT Journal Article
T1 New Modulation Technique to Mitigate Common Mode Voltage Effects in Star-Connected Five-Phase AC Drives
A1 Fernandez, Markel
A1 Sierra-Gonzalez, Andres
A1 Robles, Endika
A1 Kortabarria, Iñigo
A1 Ibarra, Edorta
A1 Martin, Jose Luis
AB Star-connected multiphase AC drives are being considered for electromovility applications such as electromechanical actuators (EMA), where high power density and fault tolerance is demanded. As for three-phase systems, common-mode voltage (CMV) is an issue for multiphase drives. CMV leads to shaft voltages between rotor and stator windings, generating bearing currents which accelerate bearing degradation and produce high electromagnetic interferences (EMI). CMV effects can be mitigated by using appropriate modulation techniques. Thus, this work proposes a new Hybrid PWM algorithm that effectively reduces CMV in five-phase AC electric drives, improving their reliability. All the mathematical background required to understand the proposal, i.e., vector transformations, vector sequences and calculation of analytical expressions for duty cycle determination are detailed. Additionally, practical details that simplify the implementation of the proposal in an FPGA are also included. This technique, HAZSL5M5-PWM, extends the linear range of the AZSL5M5-PWM modulation, providing a full linear range. Simulation results obtained in an accurate multiphase EMA model are provided, showing the validity of the proposed modulation approach.
SN 1996-1073
YR 2020
FD 2020
LA eng
NO Fernandez , M , Sierra-Gonzalez , A , Robles , E , Kortabarria , I , Ibarra , E & Martin , J L 2020 , ' New Modulation Technique to Mitigate Common Mode Voltage Effects in Star-Connected Five-Phase AC Drives ' , Energies , vol. 13 , no. 3 , 607 , pp. 607 . https://doi.org/10.3390/en13030607
NO Publisher Copyright: © 2020 by the authors.
DS TECNALIA Publications
RD 23 jul 2024