Analysis and Design of Spatial Six-Step Controllers for Permanent Magnet Synchronous Machines

Petit, Marc S.; Zeng, Hao; Sarlioglu, Bulent

doi:10.1109/ecce44975.2020.9235890

Cited by 2 publications

(1 citation statement)

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“…However, a limited PI regulator bandwidth must be used, at the cost of worsening the dynamic performance, due to the high torque harmonics in six-step. An attempt to improve the torque controller was later presented in [29], [30]. Here, the torque is controlled based on its average value during each 60 electrical degrees.…”

Section: ) Deadbeat Flux Vector Control (Dbfc)mentioning

confidence: 99%

Deadbeat Flux Vector Control as a One Single Control Law Operating in the Linear, Overmodulation, and Six-Step Regions With Time-Optimal Torque Control

Khatib

Gerling

Saur

2022

IEEE Open J. Ind. Applicat.

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This article proposes an enhanced version of the Deadbeat Flux Vector Controller (DBFC) as a one single control law which can operate in the entire torque-speed plane. The operation at any feasible modulation index can be accomplished by adequate determination of the flux trajectories at the different operating regions (e.g., PWM, overmodulation (I and II), and six-step). Continuous and seamless transition between the four operating regions is guaranteed, where the modulation index changes linearly with speed between PWM and six-step (without abrupt change in torque or acoustic problems). With the proposed strategy, undesirable torque dynamics, stability problems, and increased computational efforts associated with using multiple control laws are avoided. The transient performance of DBFC at the maximum voltage limit is analyzed in detail in the flux plane. A time-optimal torque control algorithm is developed to achieve the fastest possible torque dynamics and to considerably reduce the settling time, without the use of a voltage margin. The torque can be controlled with high accuracy and high robustness to machine parameter variations. With DBFC, no trade-off between good steady-state six-step behavior and good transient performance is needed due to the decoupling of switching and calculation frequencies. The proposed DBFC controller offers valuable features, and it is simple to implement. Simulation and experimental results are provided to validate the proposed control algorithm, which is implemented on an automotive microcontroller with a high-power/high-performance automotive traction machine (IPMSM).

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Section: ) Deadbeat Flux Vector Control (Dbfc)mentioning

confidence: 99%