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Load commutated inverters with multiple three-phase configurations are widely used in high-power synchronous motor drives due to its robustness and reliability. However, harmonic problems, poor starting performance and the limited upper frequency are the issues to be addressed. In this paper, a novel six-phase inverter system, consisting of two main three-phase inverters and an additional five-level...
Variable structure control (VSC) theory is applied to analyze and design AC servo system for field-oriented permanent-magnet synchronous motor, which is based on Luenberger load observer. Some results of simulation experiments suggest that the AC servo system based on VSC has speedy response, high accuracy and strong robustness against its parameter variations and load disturbances. Its performance...
Dual motor drives fed by single inverter are purposely designed to reduced sizes and cost with respect to single motor drives fed by single inverter. This paper presents the speed responses behavior of Dual Permanent Magnet Synchronous Motor (PMSM) driven base on two different PWM control schemes, which are Space Vector Pulse Width Modulation (SVPWM) and Hysteresis Current Controller. These two techniques...
This paper proposes the predictive controller design for a sensorless interior permanent magnet synchronous motor drive system. The predictive controllers include a current-loop predictive controller and a speed-loop predictive controller. By using the proposed control algorithms, the closed-loop sensorless interior permanent magnet synchronous motor drive system can achieve fast transient responses,...
This paper presents the simulation scheme of voltage-source inverter-fed vector-controlled permanent magnet synchronous motor(PMSM) drive system based on space vector pulse width modulation(SVPWM) with dead-time. The simulation structure of SVPWM is analyzed in details and realization scheme of SVPWM is constructed by Matlab/simulink blocks. A novel generation method of dead-time is designed using...
Precise speed control of an Interior Permanent Magnet Synchronous Motor (IPMSM) drive becomes a complex issue due to complex coupling among its winding currents and the rotor speed as well as the nonlinear nature of the developed torque. The system nonlinearity becomes severe when the IPMSM drive operates in the field weakening region. The main purpose of this paper is to present the implementation...
An analysis of permanent magnet synchronous (PMS) motors is carried out to establish a basis for high performance control of the motors. It is then used to formulate vector control and direct torque control of the machines. This provides an insight into the advanced AC motor control methods in general and into vector control and direct torque control in particular, providing new opportunities for...
PMSM drives are the upcoming drives nowadays as these have many advantages such as high efficiency, high speed, high torque to inertia ratio, high torque to current ratio etc., The estimation of PMSM drive parameters is an important consideration in their field. Many methods are available for this. However the optimal way to estimate the parameters is normally preferred making use of neural networks...
In this paper, an intelligent electric power steering system use with Permanent magnet synchronous motor drive is proposed It is to replace a traditional hydraulic power steering system and implemented in a real light hybrid electric vehicle for automotive application. Some control Technique is applied to yield basic assist logic, return compensation logic, damping compensation logic, and inertia...
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 paper aims at the following control schemes of the IPM-SM drive, (i) A closed-loop direct torque control of an IPM-SM for variable speed drive with speed/position sensor, (ii) A speed and position sensor-less direct torque control scheme of the IPM-SM drive. To achieve closed loop control of torque and stator flux linkage, two PI controllers has been used; whereas to generate reference voltage...
A position sensorless Surface Permanent Magnet Synchronous Motor (SPMSM) drive based on flux angle is presented in this paper. The motor equations are written in rotor fixed d-q reference frame. A PID controller is used to process the speed error to generate the reference torque current keeping the magnetizing current fixed. The estimated stator flux using Recurrent Neural Network (RNN) is used to...
The load commutated inverter (LCI) based synchronous motor (SM) drive fed through a 12-pulse AC-DC converter results in harmonic mitigation. These drives have further improvement of the power quality at AC mains if an appropriate passive filter is used at the AC mains for power factor correction and harmonic reduction. This paper deals with a simplified optimization algorithm based on particle swarm...
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...
This paper presents a discrete-time variable-structure-based control and a speed estimator designed for a Permanent Magnet Synchronous Motor (PMSM). A cascade control scheme is proposed which provides accurate speed tracking performance. In this control scheme the speed estimator is a robust digital differentiator that provides the first derivative of the encoder position measurement. The analysis...
Field Oriented Control (FOC) Permanent Magnet Synchronous Motor (PMSM) is a commutator less servo drive which provides high controllability, greater efficiency, superior torque to inertia ratio and high power density. However, the performance of FOC-PMSM depends on the driver circuits, which requires expensive computing elements. Besides, an intelligent current regulator is desired for a highly precise...
This paper considers the inductance spatial distribution of Interior Permanent Magnetic Synchronous Motors (IPMSM) in various load conditions. The IPMSM machine possess a unique relationship between phase inductance and rotor position, that make it possible to implement sensorless control by extracting rotor position information from the inductance distribution. During the past two decades, many sensorless...
A chattering-free robust nonlinear controller is proposed for the speed control of an IPMSM drive system to compensate for the parameter uncertainties and load disturbances. First, the input-output feedback linearization technique is used with a load torque estimator. Next, the upper bounds of the uncertainties are defined in design of the chattering-free robust controller. After that, in order to...
In high-power current-source inverter (CSI) fed drives, reduction of losses in semiconductor devices and dc-link inductor through the dc-link current minimization is one of the primary goals. In this paper, a control strategy for the high power CSI-fed interior permanent magnet (IPM) drive is proposed for this purpose. This control strategy keeps the dc-link current at minimum level without exceeding...
This paper proposes a new voltage control technique for IPMSM drives to extend DC-link voltage utilization for flux weakening operation. The presented method does not require look-up-table and motor parameter for flux weakening operation. The difference between the switching period and summation of active switching times for PWM control of inverter is used to modify the d-axis current reference under...
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