This paper presents the design and implementation of H-bridge converter with additional switch legs (HA converter) which acts as AC-DC rectifier as well as DC-AC inverter. In this topology a solid connection is provided between the grounds of the input and output terminals, which reduces common mode noise and makes the converter suitable for PV PCS in dc distribution system or stand-alone power...

The effects of optical injection locking on the nonlinear distortions of directly modulated semiconductor distributed feedback (DFB) lasers are investigated experimentally. The second harmonic distortion (SHD) and third harmonic distortion (THD), as well as the third-order intermodulation distortion (IMD3), are measured as functions of modulation frequency for both the free-running and injectio...

Power electronic converters, especially DC/AC Sinusoidal Pulse Width Modulation inverters have been extending their range of use in industry because of their numerous advantages. They typically synthesize the stair –case voltage waveform (from several dc sources) which has reduced harmonic content. This paper describes the development of design, modelling and simulation of the proposed seven le...

examination and a comparison of conventional ECM with the experimental model, a silicon diaphragm condenser microphone produced using the MEMS method. The silicon diaphragm satisfies high-temperature resistance and stable temperature characteristics because of its very small coefficient of linear expansion and it is measured total harmonic distortion THD on high pressure sound. Finally, it will...

This paper focuses on the development of a controller for grid connected photovoltaic energy conversion system. Control design of a single phase inverter interfacing a photovoltaic generator and an electrical grid is performed, based on Artificial Neural Networks. The developed controller is compared with a Proportional Integral (PI) controller through computer simulation. The obtained results ...

Conventional hysteresis current controllers have the disadvantage of a variable switching frequency. This paper proposes a fuzzy hysteresis band technique for the current control for shunt active power filter (SAPF). An active harmonic filter is used to eliminate current harmonics caused by nonlinear loads. The current control strategy utilizes using a selective Filter STF method to improve pow...

This paper presents a transformer less ac/dc converter which can be used in voltages between 90230 Vrms. Instead of a transformer, this topology consists of a buck dc/dc converter and a buck boost dc/dc converter. By the absence of transformer, reduce the complexity of converter and it is cost effective. Buck dc/dc converter keeps o/p voltage below the line voltage; limit the leakage current. B...

In the present article, the effects of a non-linear load under balanced conditions on the rating of a transformer are analysed. Non-linear loads are related to temperature increases in a transformer, which lead to deterioration and reduction of lifetime. Due to the unwanted effects of harmonic components in non-linear loads, the load connected to the transformer should be reduced. In other word...

Amplitude modulation systems are used in many areas of engineering, especially communication based disciplines. Typical systems have low-level signals which encode the desired information to be transmitted. These low-level signals are usually not of adequate power to transmit the desired information across a target medium, thus requiring modulation and power amplification. In general, two goals...

We describe the design of a micropower digital pulsewidth modulator (PWM) for a hearing instrument Class D amplifier. The PWM embodies a novel delta-compensation ( C) sampling process and a novel pulse generator. The C process is sampled at the same low rate as reported algorithmic sampling processes and it features a similar low total harmonic distortion (THD). Its arithmetic computation is ho...