Predictive Torque Control With Simple Duty-Ratio Regulator of PMSM for Minimizing Torque and Flux Ripples

Abstract

In this paper, a new method for reducing the ripples of torque and flux is proposed for the predictive torque control (PTC) of permanent magnet synchronous motors. The conventional PTC uses equations to analyze the relationship between the electrical torque and voltage with a fixed magnitude of reference voltage. Consequently, flux and torque ripples increase significantly at low-speed operation. This paper proposes an improved PTC algorithm using a simple duty-ratio regulator. The proposed method will minimize the torque error by calculating an appropriate torque minimization function to mitigate the induced torque and flux ripple at low speed operation. This torque minimization function is synthesized into the space vector pulse-width modulation block to reduce the torque ripple induced owing to the fixed time duration. The proposed scheme considerably reduces the torque and flux ripples and establishes a fast-dynamic response of the torque in the transient state. Simulation and experimental results show that the proposed method achieves a more efficient steady-state performance and a faster step response compared with the conventional PTC.

Decoupling Control of Permanent Magnet Synchronous Motor With Support Vector Regression Inverse System Method

“…As can be seen from Figure 6, the generalization ability of inverse model U q is obviously affected by the feature weights. For feature q 1 , the generalization ability is very poor when its coefficient is less than 2 −5 or greater than 2 5 . For feature q 4 , the generalization ability is very poor when its coefficient is greater than 2 6 while RMSE does not increase significantly when the coefficient gradually decreases to 2 −10 .…”

State Feedback Speed Control with Periodic Disturbances Attenuation for PMSM Drive

“…Permanent magnet synchronous motors (PMSMs) are widely used in industry, automotive, and motion control applications [1,2]. They have gained attention due to good dynamic, static, and exploitation properties such as: high-power density, high efficiency, maintenance-free, relatively low noise, superior inertia-to-weight ratio, and fast torque response [1][2][3][4][5][6]. As a consequence of the above depicted features, PMSM based variable speed drive systems (VSD) have numerous applications in the industry and domestic use [1][2][3].…”

Interval Type-2 Fuzzy Dynamic High Type Control of Permanent Magnet Synchronous Motor with Vector Decoupling Method

“…One of the more widely used control methods for these motors is the vector control method with rotor field orientation. The basic principle of operation is to decouple the magnetic field current and torque current of the motor on a synchronous coordinate system with rotor field orientation through coordinate transformation, so that it has the same operating performance as the conventional DC motor [4][5][6]. The vector control system of PMSM can realize high precision, high dynamic performance, and wide range of speed regulation or positioning control, so the vector control system of PMSM has attracted a lot of attention from scholars at home and abroad [7][8][9].…”