Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 4120-4129 |
| Number of pages | 10 |
| Journal | IEEE Transactions on Industry Applications |
| Volume | 59 |
| Issue number | 4 |
| DOIs | |
| Publication status | Published - 1 Jul 2023 |
Funding
This work was supported in part by the European Commission performed within the EU H2020 Project FITGEN under GrantAgreement 824335, and in part by the PowerElectronics InnovationCenter (PEIC) of Politecnico di Torino.
| Funders | Funder number |
|---|---|
| EU H2020 | 824335 |
| PowerElectronics InnovationCenter | |
| Politecnico di Torino | |
| European Commission |
Keywords
- DC/DC converter
- efficiency improvement
- Electric vehicles
- loss minimization
- motor drives
- multiphase machines
- variable DC-link
