RT Journal Article
T1 Postfault operation strategy for cascaded H-bridge inverters driving a multiphase motor
A1 López Sánchez, Óscar
A1 Komrska, Tomáš
A1 Álvarez Ruiz de Ojeda, Luis Jacobo
A1 Adam, Lukáš
A1 Gómez Yepes, Alejandro
A1 Medina Sánchez, Martín
A1 Doval Gandoy, Jesús
K1 3307.99 Otras
K1 3306.03 Motores Eléctricos
AB Multiphase motor drives based on a cascadedH-bridge (CHB) voltage source inverter (VSI) are suitablefor fault-tolerant applications because a damaged H-bridgecan be safely bypassed without interrupting the drive operation. This bypass has the effect of an undesired dclink voltage shortage that multiphase motors can effectivelytolerate if appropriate x-y components are injected in thestator voltages. These degrees of freedom, which are notavailable in three-phase motors, permit to reach higherspeeds without field weakening nor torque oscillations during the fault. However, no specific strategies exploiting thisparticular advantage of multilevel multiphase drives havebeen proposed so far, albeit resorting to strategies devisedfor three-phase VSIs would reduce the drive performance.This paper proposes a post-fault strategy for multiphaseCHBs with bypassed H-bridges that better uses its dclink by injecting appropriate x-y components in the modulation reference signals, without altering the α-β ones.Experimental results, obtained with a five-level five-phasemotor drive, show that the proposed strategy manages torun the motor at rated speed with negligible torque ripplewhen an H-bridge is bypassed. It is also recognized thatthe continuous operation in this situation requires using acirculating-current filter to mitigate the extra stator copperlosses that arise
PB IEEE Transactions on Industrial Electronics
SN 02780046
YR 2024
FD 2024-05
LK http://hdl.handle.net/11093/6872
UL http://hdl.handle.net/11093/6872
LA eng
NO IEEE Transactions on Industrial Electronics, 71(5): 4309-4319 (2024)
NO Agencia Estatal de Investigación | Ref. PID2021-124136OB-I00
DS Investigo
RD 13-sep-2024