The series-parallel resonant converter and its magnetic components are analysed by fundamental frequency techniques. The proposed method allows an easy design of the integrated transformer and the calculation of the losses of all components of the converter. Thus, an optimisation of the whole converter system – minimising either the volume and/or the losses of the converter (upper temperature i...

A conventional high power DC power supply systems consist of a three-phase diode rectifier followed by a high frequency converter to supply loads at regulated DC voltage. These rectifiers draw significant harmonic currents from the utility, resulting in poor input power factor. In this paper, a DC power supply based on dual-bridge matrix converter (DBMC) with reduced number of switches is p...

AbsfructA fully integrated bridge-output-to-frequency converter has been realized as signal-conditioning circuitry for a onechip smart thermal maskflow sensor. The frequency converter reads out four separate mistor bridges of the air-flow sensor in order to realize high sensitivity and direftional flow measurement over the fd angle range of 360". The converter selects the sensor bridges individ...

The small-signal modeling technique based on the extended describing function concept is applied to LCC resonant converters. The analytical model developed includes both frequency control and phase-shift control. The small-signal equivalent circuit models are also derived and implemented in PSPICE. The models are in good agreement with the measurement data. 1. INTRODUCTION An LCC resonant conve...

In this thesis, an isolated 2.5kW fullbridge DC/DC converter has been designed and analyzed regarding its efficiency and weight. By increasing the switching frequency, the magnetic components in the converter can be made smaller, in this thesis a switching frequency of 20 kHz has been compared with a switching frequency of 100 kHz. The transformer in the converter can be winded in different way...

A new method for the automated measurement of the hysteresis of the temperature-compensated inductance-to-frequency converter with a single quartz crystal is proposed. The new idea behind this method is a converter with two programmable analog switches enabling the automated measurement of the converter hysteresis, as well as the temperature compensation of the quartz crystal and any other circ...

In this paper, a two-stage AC/DC converter is presented for a low-profile laptop adaptor. The system consists of a boost power factor pre-regulator and LLC resonant converter. The pre-regulator features high PF and high-efficiency, while secondary LLC converter features zero voltage switching (ZVS). The transformer in LLC converter is splited in two to reduce current stress and converter height...

The boost topology is the most popular topology used in power factor correction circuits. The efficiency and performance of the boost converter depends on the switching frequency affecting the switching losses. At high frequency operations the switching losses of the converter is considerable and decreases the efficiency of the converter. To remove this problem the converter is designed to oper...

An asymmetrical pulse width modulated (APWM) dc-dc converters operating at constant frequency was simulated using Pspice software package. This converter incorporates constant frequency operation in a basic soft switching half bridge topology without any additional component and complexity. In this paper operation of converter configuration with capacitive filter in the output is discussed. A 5...

Multi-port converter with three active full bridges, two series-resonant tanks and a Multi-winding transformer is proposed. It uses a single power conversion stage with high-frequency link to control power flow between batteries, load and a renewable source such as fuel cell. The converter has capabilities of bidirectional power flow in the battery and the load port. Use of series-resonance aid...