Abstract – A novel passive boost power converter forsingle-phaseswitched reluctance motor is presented. A simple passive circuit is proposed comprisingthree diodes and one capacitor. The passive circuitis added in the front-end of a conventional asymmetric converter to obtain high negative bias. Based on this passive network, the terminal voltage of the converter side is a general DC-link volta...

The performance of high-power converters employing silicon controlled rectifiers (SCRs) operating at several kilovolts and switching several thousands of amperes is strongly dependent on the triggering circuit and the protecting circuit (snubber) used. In this paper two standalone trigger circuit topologies are discussed and test results are given for one of them in particular, built with off-t...

In this paper, a novel high step-up DC-DC converter with coupled-inductor and voltage-doubler circuits is proposed. The converter achieves high step-up voltage gain with appropriate duty ratio and low voltage stress on the power switches. Also, the energy stored in the leakage inductor of the coupled inductor can be recycled to the output. The operating principles and the steady-state analyses ...

A study of the fundamental of operation of a three-phase AC-DC power converter that uses Zero-Voltage Transition (ZVT) together with Space Vector Pulse Width Modulation (SVPWM) is presented. The converter is basically an active rectifier divided into two converters: a matrix converter and an H bridge, which transfer energy through a high-frequency transformer, resulting in a modular AC-DC wirel...

The matrix converter system is competitive solution to replace the conventional two stage ac to ac converter. In this paper, a matrix converter driving a speed-controlled induction machine is examined under open-switch fault. First, a-predictive direct torque method is proposed using only the motor torque and current. Second, a motor speed control is presented. The proposed techniques do not re...

With the development of fuel cell based power systems, the need for more advanced DCDC power converters has become apparent. In such applications DC-DC converters provide an important link between low voltage fuel cell sources and inverter buses operating at significantly higher voltages. Advancements in converter efficiency, cost reduction, and size reduction are the most necessary. These chal...

This paper describes the development of a behavioral model of a dc/dc converter. The focus is on developing a model that simulates quickly, yet retains the behavioral features of a physical converter. Based on a physically motivated behavioral circuit model, the model is then implemented in the Modelica modeling language and simulated using the Dymola simulation environment. Simulation results ...

We present a first order analog-to-digital converter with time-variant window. If a DC input is applied, the converter outputs a binary sequence until the internal state enters into the window. It is clarified analytically that the converter can realize higher resolution and lower error variation with shorter code length than previous converters. We also present a simple implementation method u...

A dc converter is a lossless dc transformer that must supply regulated outputted voltage under varying load and input voltage condition. Also the converter values changes with time, temperature and pressure. Hence to control the output voltage, detailed understanding of the dynamic behaviour, transient response and small signal characteristics of the converter is required, which can’t be unders...

The fly back converter has been widely used for multi outputs due to the simple structure and low cost in low-power applications. This paper presents a new multi output converter. It consists of a half-bridge inverter with boost converter in primary side and a fly back rectifier that is integrated with an auxiliary buck converter in secondary side. The boost converter is used to generate high v...