TY - JOUR
T1 - Active Control of Variable DC-Link for Maximum Efficiency of Traction Motor Drives
AU - Pescetto, Paolo
AU - Sierra-Gonzalez, Andres
AU - Alvarez-Gonzalez, Fernando
AU - Kapeller, Hansjorg
AU - Trancho, Elena
AU - Pellegrino, Gianmario
N1 - Publisher Copyright:
© 1972-2012 IEEE.
PY - 2023/7/1
Y1 - 2023/7/1
N2 - Modern electric vehicles often interpose a DC/DC converter between traction battery and inverter, boosting the supply voltage of the drive. The power losses in the two converters and in the electric motor significantly vary with the DC-link voltage amplitude. In this work, a novel control algorithm is proposed to adapt online the DC-link voltage during vehicle operation, pursuing the maximum efficiency of the DC/DC converter and traction inverter without affecting the motor control dynamic. The key principle of the proposal, suitable for 3-phase and multi-three-phase drives, relies on the DC-link voltage minimization on varying the drive operating conditions. Among its advantages, the proposed variable DC-link control is independent of the motor parameters, the adopted torque/speed control strategy and the number of 3-phase sets of the drive. Although originally developed for electric vehicles, it can be adopted in a wide number of applications. Straightforward calibration roles are also provided. The proposed algorithm is deeply validated in simulation and experiments using a full-scale 135 kW 6-phase traction motor drive at TRL6.
AB - Modern electric vehicles often interpose a DC/DC converter between traction battery and inverter, boosting the supply voltage of the drive. The power losses in the two converters and in the electric motor significantly vary with the DC-link voltage amplitude. In this work, a novel control algorithm is proposed to adapt online the DC-link voltage during vehicle operation, pursuing the maximum efficiency of the DC/DC converter and traction inverter without affecting the motor control dynamic. The key principle of the proposal, suitable for 3-phase and multi-three-phase drives, relies on the DC-link voltage minimization on varying the drive operating conditions. Among its advantages, the proposed variable DC-link control is independent of the motor parameters, the adopted torque/speed control strategy and the number of 3-phase sets of the drive. Although originally developed for electric vehicles, it can be adopted in a wide number of applications. Straightforward calibration roles are also provided. The proposed algorithm is deeply validated in simulation and experiments using a full-scale 135 kW 6-phase traction motor drive at TRL6.
KW - DC/DC converter
KW - efficiency improvement
KW - Electric vehicles
KW - loss minimization
KW - motor drives
KW - multiphase machines
KW - variable DC-link
UR - http://www.scopus.com/inward/record.url?scp=85153519524&partnerID=8YFLogxK
U2 - 10.1109/TIA.2023.3267770
DO - 10.1109/TIA.2023.3267770
M3 - Article
AN - SCOPUS:85153519524
SN - 0093-9994
VL - 59
SP - 4120
EP - 4129
JO - IEEE Transactions on Industry Applications
JF - IEEE Transactions on Industry Applications
IS - 4
ER -
