Field Enhancing Model Predictive Direct Torque Control of Permanent Magnet Synchronous Machine

Kai Zhang, Mingdi Fan, Yang Yong, Zhongkui Zhu, Cristian Garcia, Jose Rodriguez

Research output: Contribution to journalArticlepeer-review

Abstract

For the short-term high torque output, an improved model predictive direct torque control (MPDTC) method with field enhancing is proposed to increase torque. In order to avoid the possible loss of synchronism while increasing torque, the MPDTC method limits the load angle in the cost function. Under the constant load angle limitation, the improved method increases the torque output capability by increasing the magnetic field. This paper starts from the torque calculation, theoretically analyzes the torque-load angle characteristics, and illustrates the flux vector trajectory with the voltage limit circle and current limit circle. The proposed method maintains the dynamic and static performance of the traditional MPDTC method while ensuring the system stability. The experimental results show that the torque capacity of the proposed method has been improved, and it has stable extreme output torque. So, some applications, such as electric load simulators, can choose the motor with small capacity and small inertia, thereby weakening negative effects of the inertia torque.

Original languageEnglish
JournalIEEE Transactions on Energy Conversion
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • Cost function
  • Couplings
  • field-enhancing
  • Mathematical model
  • Permanent magnet synchronous machine (PMSM)
  • predictive control
  • Rotors
  • Stator windings
  • Torque
  • Torque control
  • torque control

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

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