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The class-E power amplifier with shunt filter, which is also known as the class-E power amplifier with shunt capacitance and shunt filter, is proposed in this brief for any duty ratio. The basic circuit waveforms and design equations are derived and the design parameters of the circuit elements for some selected duty ratios are numerically solved. Subsequently, the characteristics of the class-E power...
According to the requirement of the power factor and the dynamic performance of the asynchronous machine tool field, an asynchronous motor inverter with active power factor correction is proposed. The proposed inverter is a 3kW asynchronous motor drive control platform. At first, the proposed single phase converter with APFC is realized by using the MATLAB/SIMULINK. Then, the boost APFC is designed...
This paper presented the design and implementation of an induction motor drive. In order to improve energy efficiency of this drive, system configuration comprised a single to three-phase converter with additional circuitry for PFC. In this design, using TI's UC3854 as the PFC controller chip, and the related parameters were designed. The control scheme was based on V/f control using two low-cost...
This paper proposes a novel design of high power IGBT interlocking drive and protect circuit supplied by single power based on ACPL-332J chip. Firstly, it introduces the basic principle of interlocking drive circuit. Then, peripheral protect circuit is presented in detail, including chip protect circuit and IGBT protect circuit. Why and how to choose parameters of each component also are described...
A novel dualband impedance transformer based on fractional-order inductor and capacitor is proposed in this paper. This transformer is designed to transfer the arbitrary frequency-dependent complex impedances sources to loads at two irrelevant frequencies with one fractional-order inductor and two fractional-order capacitors. Each fractional-order element has two parameters to be determined: the order...
An adjustable unequal power divider design is proposed. The design replaces two transmission lines of the two-section power divider by two T-equivalent circuits. By tuning the capacitors in the T-equivalent circuits, the power ratio can change from 1∶2 to 1∶3 or from 1∶3 to 1∶2. The circuit has been simulated by EM simulators and verified the performance by fabricated and measured the prototype layout...
This thesis focuses on the analysis and design of the LLC resonant half-bridge converter with natural interleaving power factor correction circuit. At first, the characteristics of the natural interleaving power factor correction will be analyzed. Since the natural interleaving PFC can raise the power levels and minimize the size of energy storage inductor, it is suitable for the front stage of the...
This paper presents the results from a theoretical study on the harmonic emission of a windpark in the frequency range up to 200 kHz. The calculations are based on the transfer function from an individual turbine to the pubic grid, expressed in the frequency domain. The model has been applied to a general windpark, for which a mathematical expression has been derived. The study provides relations...
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