Dynamic Current Reference Determination of Electrically Excited Synchronous Machines Based on Torque Gradients of Copper Losses
Artikel i vetenskaplig tidskrift, 2024

Electrically excited synchronous machines (EESMs) have become an attractive solution to electric vehicles. The excitation of the machine can be regulated by adjusting field current. This introduces one additional degree of control freedom. The control of armature current in stator and field current in rotor is expected to not only reduce the total losses, but also dynamically redistribute the load on both windings so that neither of them overheats. To realize this function, an algorithm is proposed in this study to dynamically determine the current references in EESM torque control. A cost function is introduced by placing weights on stator and rotor copper losses separately. The weights can be adjusted dynamically. The cost function is minimized by moving the current reference vector. The moving of the vector is orthogonally decomposed into a torque-related component and a cost-related component. When current or voltage limits are reached, a cancellation technique is activated to constrain the reference vector. It is shown in experimental results that expected performance is achieved in all operating conditions.

electrically excited synchronous machine

torque control

current reference determination

Författare

Junfei Tang

Chalmers, Elektroteknik, Elkraftteknik

Bowen Jiang

Chalmers, Elektroteknik, Elkraftteknik

Hao Chen

Chalmers, Elektroteknik, Elkraftteknik

Yujing Liu

Chalmers, Elektroteknik, Elkraftteknik

Stefan Lundberg

Chalmers, Elektroteknik, Elkraftteknik

IEEE Transactions on Power Electronics

0885-8993 (ISSN) 19410107 (eISSN)

Vol. 39 6 7423-7433

Power electronics optimisation for next generation electric vehicle components (PowerDrive)

Europeiska kommissionen (EU) (101056857-PowerDrive), 2022-05-01 -- 2025-10-31.

Ämneskategorier

Reglerteknik

Annan elektroteknik och elektronik

DOI

10.1109/TPEL.2024.3377470

Mer information

Senast uppdaterat

2024-05-11