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A new control approach for speed synchronism of permanent magnet synchronous motor (PMSM) with dual contra-rotating rotors is developed. During recent years, the PMSM with dual contra-rotating rotors has become a hot topic in academic research due to its high efficiency and simple structure. However, it is difficult to guarantee the stability of the system when the motor runs under the condition of...
The rotor position is integrant information for vector control drive system of Permanent Magnet Synchronous Motor (PMSM). In this paper, the focus is on the rotor position of PMSM detecting by the resolver sensor. The outstanding features of this sensor are its robust structure and noise insensitivity. To extract speed from the output of resolver we need R/D demodulator circuit. A new Artificial Neural...
This research article deals with the two closed loop speed control techniques namely Vector Control and Direct Torque Control for Permanent Magnet Synchronous Motor Drive. These two control techniques are critically evaluated for the performance comparison in terms of starting response, steady state response and transient condition. The simulation models of the two controllers are developed in Matlab/Simulink...
Aim at the existing problems of the Extended Kalman Filter (EKF) in speed sensorless control system of permanent magnet synchronous motor (PMSM), such as too much computation, complex structure and high cost. A kind of Reduced-order Extended Kalman Filter (Reduced-order EKF) in speed sensorless control system of PMSM is proposed in this paper. By estimating the counter electromotive force according...
Permanent magnet synchronous motors (PMSM) are appropriate for applications with load-independent speeds or synchronous operation with high accuracy under defined speed. In this paper analysis the structure and equations of the PMSM, direct torque control (DTC) and voltage space vector process then study model reference adaptive system (MRAS) estimators. The PI controller uses from estimate speed...
In this paper, a nonlinear PI controller is developed to control speed of PMSM, it can adjustment of controller parameters automatically in order to achieve the best control effect in control process. Simulation results show that it was faster than the traditional controller response and have a smaller overshoot.
The paper discusses the problem of rotor position estimation for the nonsalient permanent magnet synchronous motor (PMSM) and presents a Sliding Mode (SM) EMF observer that is based on the machine's model in the stationary reference frame. The speed of the PMSM which is an input of the proposed sliding mode observer is obtained from a speed estimator. The paper assumes that the speed estimate is different...
Based on the analysis of compressor load behaviors, a new three-phase startup strategy for permanent magnet synchronous motor (PMSM) compressor is presented, which includes parking, open-loop startup and closed-loop operation. When the speed loop closes, an improved method of flux estimation for PMSM compressor sensorless control is proposed, which accomplishes parking, efficient speed estimation...
Permanent magnet synchronous motors feature high power density, high torque to inertia ratio and high conversion efficiency. These characteristics made them advantageous to use in specific applications such as robotics and traction. However, one of the major drawbacks of these motors is the torque ripple, being especially harmful when a high performance position and speed control is required. Usually,...
Permanent magnet synchronous motors are used extensively in high performance control systems according to developments in power electronics and control technology. In this work, performance comparison of Permanent Magnet Synchronous Motor (PMSM) is made by performing speed control. Proportional-Integral Control (PIC), Fuzzy Logic Control (FLC) and Proportional-Integral with Fuzzy Logic Control (PIFLC)...
A haptic system is an articulated mechanical structure with motors, sensors as well embedded electronics allowing force feedback. It enables the user to interact with virtual reality through the sense of touch and sight. Speed control of such systems usually becomes unstable at low speed range due to the imposed speed by the operator's hand. This paper describes the implementation of a full order...
In this paper, a nonlinear control approach for permanent magnet synchronous motor (PMSM) drives, without mechanical sensors, is presented. The proposed method is based on a combination of the well-known nonlinear regulation technique, state-dependent Riccati equation (SDRE), and its filtering counterpart (SDREF) which is derived by constructing the dual of this control method. The SDREF is designed...
System with mechanical speed sensor has lower reliability and higher cost. Traditional direct torque control method has disadvantages of big ripples on current and flux linkage and torque. To solve these problems, the Extended Kalman Filter is established to estimate both stator flux linkage and rotor speed. Therefore, speed sensorless direct torque control for surface permanent magnet synchronous...
This paper presents the use of a predictive technique to control the currents in a PMSM, driven by a voltage source inverter. This method allows for a high quality current control without using linear controllers and modulators, resulting in a conceptually simple solution. Simulation an experimental results confirm the good performance of the drive controlled by this method.
The purposes of this study are developed a servo drive system with fuzzy neural network (FNN) for a permanent magnet synchronous motor (PMSM) drive system based on digital signal processor (DSP). First, a field-oriented PMSM drive system which consists of a hysteresis-band current-controlled PWM VSI, a coordinate translation and sin/cos lookup table generation are implemented using DSP control system...
In the present work an artificial neural network (ANN) based speed controller and speed estimator of PMSM (permanent magnet synchronous motor) drive is designed and simulated using SIMULINK under MATLAB and results are compared with conventional PI controller and observer based drive of PMSM. The performance of ANN based system is evaluated for various disturbances to substantiate the proposed control...
In this paper, the field oriented control (FOC) for the permanent magnet synchronous motor (PMSM) and hardware-in-loop Simulation (HIL) test bench based on dSPACE is developed. Based on a novel PMSM mathematic model with iron losses taken into consideration, an improved calculation expression of isd and isq is proposed and a FOC controller is designed. To validate the presented control, a test bench...
This paper presents a speed sensorless non-salient permanent magnet synchronous motor (PMSM) sliding mode control algorithm. The key idea is to integrate the benefits of the variable structure system control design and the event-driven sequential control structures to raise the system performance and control efficiency. The operation at low speed is improved by reducing the disturbance impact. The...
Two new methods to improve the ultra-low speed control performance of ac servo system are described in this paper. One is improved M/T method, which could minimize the influence of speed detection dead time and smooth the measurement. Another is instantaneous speed detection based on constant jerk model, which assumes the rotor jerk is constant at the interval of sampling period. The instantaneous...
As technology improves, studies on permanent magnet synchronous motors have increased and became to major on field oriented control and direct torque control methods. The main topics of permanent magnet motor control are mathematical modelling, voltage feed inverter model, space vector modulation and determination of voltage vectors. In this study, the structure and direct torque process of the PMSM...
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