Abstract
The paper proposes a new speed control method to improve control quality and expand the Permanent Magnet Synchronous Motors speed range. The Permanent Magnet Synchronous Motors (PMSM) speed range enlarging is based on the newly proposed power control principle between two voltage sources instead of winding current control as the conventional Field Oriented Control method. The power management between the inverter and PMSM motor allows the Flux-Weakening obstacle to be overcome entirely, leading to a significant extension of the motor speed to a constant power range. Based on motor power control, a new control method is proposed and allows for efficiently reducing current and torque ripple caused by the imbalance between the power supply of the inverter and the power required through the desired stator current. The proposed method permits for not only an enhanced PMSM speed range, but also a robust stability in PMSM speed control. The simulation results have demonstrated the efficiency and stability of the proposed control method.
Highlights
The speed control principle in the constant torque region is suitable for the vector control method when the operating voltage is lower than the inverter output voltage limit
The remainder of this paper is structured as such: Part 2 presents the Permanent Magnet Synchronous Motors (PMSM) math model and the principle of transferring power from the inverter to the PMSM; Part 3 introduces the principle of controlling a PMSM motor’s speed based on the active power control; Part 4 shows the results obtained after the simulation modeling for the proposed algorithm with the Direct Current Calculation and Vector Current Control algorithms used in the comparison; Part 5 includes the conclusion
The Vector Current Control parameters used in the simulation; these parameters belong to the EMJ(VCC) method [35] and the Direct Current Calculation (DCC) method [36] were used to
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Several improvements have been used in PMSM speed control in FW to improve of the d-axis current component This violation’s nature persists and adversely control efficiency and reduce current ripple during voltage limit violation in the FW zone. When entering the FW zone, the d-axis current is adjusted to increase negatively based on the PI controller, where input is the deviation between the maximum voltage amplitude supplied by the inverter and the voltage at the current controller output. A Fuzzy-PI controller is used instead of the PI controller in the more refined determination of the d-axis reference current when the motor operates in the FW region These innovative methods minimize output torque ripple, while reducing the reference current’s effect on the control voltage. The remainder of this paper is structured as such: Part 2 presents the PMSM math model and the principle of transferring power from the inverter to the PMSM; Part 3 introduces the principle of controlling a PMSM motor’s speed based on the active power control; Part 4 shows the results obtained after the simulation modeling for the proposed algorithm with the Direct Current Calculation and Vector Current Control algorithms used in the comparison; Part 5 includes the conclusion
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