Open AccessModel predictive control with fixed weighting factor for three‐phase four‐switch inverter‐fed PMSM drives considering capacitor voltage offset suppression
Author(s) -
Hang Jun,
Zhang Jibo,
Wu Han,
Ding Shichuan
Publication year - 2020
Publication title -
iet electric power applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.815
H-Index - 97
eISSN - 1751-8679
pISSN - 1751-8660
DOI - 10.1049/iet-epa.2020.0344
Subject(s) - control theory (sociology) , model predictive control , voltage , capacitor , offset (computer science) , decoupling capacitor , vector control , direct torque control , engineering , computer science , induction motor , electrical engineering , control (management) , artificial intelligence , programming language
This study proposes a model predictive control (MPC) method with a fixed weighting factor for three‐phase four‐switch inverter‐fed permanent magnet synchronous motor drives to suppress the capacitor voltage offset. The prediction model of the capacitor voltage difference is obtained based on the relationship between capacitor voltage and phase current. Then by analysing the relationship between basic voltage vector, electromagnetic torque and flux amplitude, the control of electromagnetic torque and flux in the model predictive torque control is transformed into the control of the voltage vector. The dimension of the capacitor voltage difference is the same as that of the voltage vector, hence the cost function with the fixed weighting factor is defined with the consideration of the capacitor voltage offset suppression. The effectiveness of the proposed MPC method is validated by the simulation and experiment.