Electronic filter

About: Electronic filter is a research topic. Over the lifetime, 13207 publications have been published within this topic receiving 93063 citations. The topic is also known as: filter.

Analysis of microstrip circuits using three-dimensional full-wave electromagnetic field analysis in the time domain

Abstract: In this method, the circuit is excited by a raised cosine pulse source that includes broadened frequency components. The frequency characteristics are then computed from the Fourier transform of the output transient responses. To evaluate the validity and capability of the method, a side-coupled microstrip filter is analyzed and the frequency characteristics are calculated. A quasistatic analysis of this filter is also presented and the results compared with measurements. The frequency characteristics calculated with the full-wave analysis in the time domain show excellent agreement with the measured values, thus demonstrating the validity and the power of the analytical method. >

Series active power filter compensates current harmonics and voltage unbalance simultaneously

Abstract: An active power filter connected in series to the power distribution system is presented and analysed. The series active power filter is implemented with a three-phase PWM voltage-source inverter and operates with a resonant LC passive filter connected in parallel to the power lines. The proposed scheme is able to simultaneously compensate current harmonics, the fundamental negative and zero sequence voltage components generated by the voltage source unbalance, and also eliminates the zero sequence current harmonic components that circulate through the neutral conductor. The active power filter is discussed in terms of the principles of operation under steady-state and transient conditions. The design and implementation of the power and control circuits are reported. Key predicted results are verified experimentally on a 5 kVA prototype model.

A New Space Vector Modulation Strategy for Gammon Mode Voltage Reduction

Abstract: In this paper the impact of the inverter modulation strategy on common mode conducted emissions is addressed. Whereas typically passive filter designs are used to mitigate the coimmon mode current produced by the inverter, active filtering is proven to greatly reduce common mode conducted emissions due to the modulation of the converter. A new space vector modulation strategy is presented for common mode EM1 reduction in three and four phase converters.

Design of a Photovoltaic Simulator With a Novel Reference Signal Generator and Two-Stage LC Output Filter

Abstract: This paper presents a systematic design technique for a photovoltaic (PV) simulator. The proposed technique helps to improve control loop bandwidth and system response. The PV equivalent circuit is used to generate the current-voltage reference curves. A novel technique is proposed and implemented with analog controllers to simplify the reference signal generator, and to avoid computation time delays in digital controllers. A two-stage LC output filter is implemented to push the resonant frequency higher, and thus, allowing a higher bandwidth control loop design while keeping the same switching ripple attenuation as in the conventional one-stage LC output filter. Design procedures for both control and power stage circuits are explained. Experimental results verify the steady state and transient performance of the proposed PV simulator at 2.7 kW output.

Log-domain filters based on LC ladder synthesis

Abstract: A design method is proposed for the synthesis of linear, high-order, continuous-time filters using a unique translinear integrator circuit. Unlike previous attempts at incorporating translinear circuits into filter design, the proposed theory makes explicit use of the exponential nature of the bipolar transistor. This technique is based on the operational simulation of LC ladders. A 5th-order Chebyshev filter is designed, simulated and verified experimentally. The filter shows good amplitude response as well as distortion levels comparable to other filtering schemes.