MPC-Based Flux Weakening Control for Induction Motor Drive With DTC for Electric Vehicles

Induction motors require high speed (over the rated speed) in working areas such as electric vehicles, which is achieved through flux weakening control. A new flux weakening control approach for a direct torque controlled induction motor operating at high speeds is recommended in this article. The proposed model predictive control (MPC) based flux weakening strategy enhanced criteria such as time to reach steady state, ripple, and so on, in addition to operating the induction motor over its nominal speed. The induction motor has been driven with direct torque control (DTC) in the flux weakening study because it has the least dependence on the parameters and can react more quickly to torque/speed changes. DTC controlled induction motor includes features such as being able to adapt quickly to changes in torque/speed references, low dependency on system parameters, reaching high speeds, time to reach steady-state, and low steady-state error using the proposed MPC-based flux weakening control.

Automated summary

This article recommends a new flux weakening control approach for induction motors operating at high speeds, particularly in working areas such as electric vehicles. The proposed approach is based on model predictive control (MPC) and aims to enhance criteria including the time to reach steady state, ripple, etc., in addition to enabling operation of the induction motor beyond its nominal speed. A direct torque controlled (DTC) induction motor is used in the flux weakening study due to its minimal dependence on parameters and its ability to quickly respond to torque/speed changes. By utilizing the proposed MPC-based flux weakening control, the DTC-controlled induction motor exhibits features such as fast adaptation to changes in torque/speed references, low dependency on system parameters, ability to reach high speeds, short time to reach steady-state, and low steady-state error.