HARMONIC REDUCTION IN A SINGLE-SWITCH THREE-PHASE BOOST RECTIFIER WITH HARMONIC-INJECTED PWM by Qihong Huang Fred C. Lee, Chairman Electrical Engineering

this paper presents the new topology of three phase on line uninterruptible power supply (ups) by employing t-source inverter (tsi) with maximum constant boost pulse width modulation (pwm) control and the results are compared with the conventional uninterruptible power supply (ups). the conventional ups consists of voltage source inverter (vsi) with step up transformer or dc-dc booster which de...

The determination of the frequency spectrum of a pulse width modulated (PWM) signal with general band-limited input x(t) has been an open problem for many years. We describe a new approach that gives exact analytical expressions for the spectra of uniform-sampling PWM signals and natural-sampling PWM signals with single-edge as well as with doubleedge modulation. For the special case of single ...

In this study, we propose a novel pulse-width modulation (PWM) method to reduces common-mode noise. The proposed includes 120-degree dormant two-phase modulated three-phase inverter that the comparative carrier of one two phases. This configuration is easy implement because it uses triangular-wave comparison. an experiment using inverter, current was reduced by approximately 60%, and in particu...

Power Inverters have a high range of applications not only in domestic appliances but also in industries for performing variety of operations regarding switching and conversion of electrical energy. The purpose of this research paper is to analyze a three phase inverter using PWM topology to obtain a smooth and pure sinusoidal wave form of good quality which ensures better operation for sensiti...

A new type of single-phase stand-alone induction generator using a three-phase induction machine and a single-phase voltage-source PWM inverter is introduced. The generator scheme is capable of producing constant load frequency with a very well regulated output voltage. A small lead acid battery and a single-phase full diode-bridge rectifier are used to feed the inverter. The inverter feeds one...

Traditional cascade multilevel inverter can only transmit one-direction of energy. This paper proposes a new cascade multilevel inverter topology and control strategy based on part units to realize the energy feedback. By using PWM converter to replace uncontrollable converter in part units of the traditional inverter, and combining the inverter with H-bridge inverter, the two-direction running...

Atrial fibrillation (AFIB) is a common clinical problem affecting approximately 0.5-1% of the United States population. Radio-frequency (RF) multielectrode catheter (MEC) ablation has successes in curing AFIB. We utilized finite-element method analysis to determine the myocardial temperature distribution after 30 s, 80 degrees C temperature-controlled unipolar ablation using three 7F 12.5-mm el...

The interlinking converters is one of the important components in hybrid mirogrid system, study structure and control method has been implemented achieved positive results. This paper proposes an improved decentralized level-shifted carrier-based PWM for a modular multilevel converter (IC-MMC) standalone microgrid (HMG-Hybrid Microgrid). Main research objectives to capability proposed IC-MMC un...