<div><span lang="EN-US">Three speed-control strategies for DC and AC drives are presented in this study: a proportional<strong> </strong>integral derivative (PID) control strategy; an internal model (IMC); state-space by pole assignment with full state observer (ESSO). The three applied to case study, demonstrating the potential of each one. Experimental identification w...

The current control is an important issue in power electronic circuits, particulary in dc to ac inverters which are used in ac motor drives and continuous ac power supplies where the objective is to produce a sinusoidal ac output whose magnitude and frequency can both be controlled. In this paper, the current control of three-phase pulse width modulated voltage source inverter (PWM-VSI) has bee...

This thesis deals with the development of model predictive control of ac electric drives with long prediction horizons and yet with computational cost of the algorithm comparable to conventional cascade control approaches. The basic idea is to approximate the cost to go function of dynamic programming taking into account long prediction horizon. For specific cases (linear model and quadratic co...

This paper proposed a robust adaptive neural network control for an XY table. The XY table composes of two AC servo drives controlled independently. The neural network with radial basis function is employed for velocity and position tracking control of AC servo drives to improve the system’s dynamic performance and precision. A robust adaptive term is applied to overcome the external disturbanc...

The revolution in power electronics has opened an era for widespread use of power converters of different power rating from few Watts to Mega-Watts. AC-DC converters are most widely used power converters as the distributed electric power is AC supply, while the applications based on DC supply as well as variable frequency AC supply, need conversion of AC supply into DC supply. Large current har...

In a practical alternating current (ac) machine drive system, zero-order hold equivalent discrete-time model motivates the development of direct regulator structure. However, it is complicated to establish for asymmetric 1 <fn id="fn1" xmlns:xlink="http://www...

In the last decade, industrial AC drives have become more advanced in performance and more compact in size. This is largely due to the rapid development of power silicon technology, including the enhancement of IGBTs and of High Voltage Integrated Circuits. Additionally, this technological growth has been particularly accelerated for low horsepower (< 5 Hp) AC Drives. Yet the ground fault prote...

One way of controlling AC motors for variable speed applications is through the open loop scalar control, which represents the most popular control strategy of squirrel cage AC motors. Nowadays it is used in applications, where information about the angular speed need not be known. It is suitable for a wide range of drives as it ensures robustness at the cost of reduced dynamic performance. Typ...