Decoupled Speed and Flux Control of Three-Phase PMSM Based on the Proportional-Resonant Control Method

Abstract

Field-oriented control (FOC) has achieved great success in permanent magnet synchronous motor (PMSM) control. For the PMSM drive, FOC allows the motor torque and flux to be controlled separately, which means the torque and flux are decoupled from each other. Since the torque control is achieved by the speed controller, it can be considered that the speed and the flux of the PMSM are also decoupled from each other and can be controlled separately. In this paper, we propose a PMSM vector control using decoupled speed and flux controllers based on the proportional-resonant (PR) control method. A flux controller is proposed to control the flux of the PMSM and generate the d-axis reference current, whereas the speed regulator is used to generate the torque as well as the q-axis reference current. The PR controller is proposed to control the dq-axis currents and generate the reference voltages; its design is included.Therefore, decoupled speed and flux controllers are controlled separately using the PR controller. The Matlab/Simulink environment is utilized for the simulation, while the dSPACE DS1104 is used for the experimental work. The proposed control method is simple; there are no flux or torque estimators required, so it can avoid the complexity of estimators in the control scheme. The motor is tested under different scenarios, including flux change, speed change, and load torque change. The simulation and hardware results show the effectiveness of the proposed control method in controlling the the speed and the flux of PMSM with fast motor response and good dynamic performance in the different scenarios.

A Novel Architecture of a Six Degrees of Freedom Parallel Platform

“…By comparing the real-time motion trajectory with the reference trajectory, the controller output of each robot arm at the current moment is calculated by an appropriate control algorithm, such as the model predictive control (MPC) and proportional plus integral (PI) controller, and sends the control output to the servo driver through the CAN bus. Each servo driver receives the control information at the current moment through the CAN bus, uses the field-oriented control (FOC) algorithm to control the BLDC motor's movement [27][28][29], completes the length adjustment of the mechanical arm, and sends the BLDC motor's operating angle information measured by the encoder through the CAN bus to the parallel platform control center. Such a structure can make full use of the high computing power of the PC to complete complex control operations, and complete real-time control in the driver to achieve better control effects.…”

Decoupled Speed and Flux Control of a Three-Phase Permanent Magnet Synchronous Motor under an Open-Circuit Fault Using a PR Current Controller

“…This transformation yields two distinct components: the direct current (i d ), responsible for generating the magnetic flux, and the quadrature current (i q ), used to generate both torque and motor speed. As a result of this decoupling, independent control can be achieved of the PMSM flux and torque [5,6].…”