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In this paper, a novel control algorithm has been proposed to regulate the DC bus voltage of a single phase shunt active power filter using a fuzzy logic controller. The DC bus voltage of a shunt active power filter should be controlled to compensate the filter losses on the grid. In many industrial applications, a PI controller is generally used to regulate the DC bus voltage of shunt active power...
In many areas, the use of electronic devices simultaneously results in overloads, voltage fluctuations, and decreases in voltage quality. To protect the sensitive electronic equipments from these voltage fluctuations and enable to gain maximum efficiency from these devices, different types of electronic and electromechanical voltage regulators are used in industry. This paper presents a new type single-phase...
This paper presents a low cost, user friendly and effective drive system for the speed control of travelling wave ultrasonic motor (TWUSM). Driving frequency and voltage were used as control inputs in the speed control. Driving frequency was adjusted by semiconductor switches existing in a two-phase half-bridge serial-resonant inverter circuit controlled by digital integrated circuits, whereas driving...
Controlled/uncontrolled rectifiers draw harmonic reach currents from the grid. Harmonic components of the line current affect the grid and other equipment around the point of common coupling. Therefore, so the grid current harmonic distortion levels must be kept at desired level. Multi-pulse rectifiers are commonly used in high power rectifier systems to reduce grid current harmonics and improve power...
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