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An ac voltage regulating system of doubly Salient Electro-magnetic Generator has been performed in this paper. In order to maintain the high voltage 360VDC stable, the dual boost converter with fixed frequency PWM controlled is adopted. Three-phase dual buck inverter was adopted to output 115VAC/400Hz. the generating system configuration, control strategy of dual boost converter and three-phase dual...
A new asymmetrical hybrid multilevel inverter topology is presented. The new topology improve the number of the output voltage level greatly through cascading two five-level H-bridge cells. A hybrid PWM strategy is proposed for the new topology that the switches of different cells works in different switching frequency to low switching losses. Lastly, an experimental 17-level asymmetrical inverter...
This assay supposed one kind of asymmetrical multi-level inverter that based on the topology of cells cascading, every cell in this inverter is composed of one two-levels inverter series with several three-levels H bridges, the controlling system is constructed by DSP and FPGA. This article described the topology of this inverter and its controlling methods in detail. In final, tested this inverter's...
A simple but powerful design method based on real-coded Genetic algorithms (GAs) to solve the minimization of the Total Harmonic Distortion (THD) criterion is obtained. GAs provides a much simpler approach to off-line tuning of Pulse width Modulation (PWM) switching angles than the rather complicated non-genetic optimization algorithms. Genetic algorithms are exploratory search and optimization procedures...
There is a strong trend in the photovoltaic (PV) inverter technology to use transformerless topologies in order to acquire higher efficiencies. This paper presents a single-phase five-level grid connected PV inverter with a novel dual reference modulation technique. Two reference signals identical to each other with an offset equivalent to the amplitude of the rectified inverted sine carrier signal...
A decentralized controller for the synchronization of two remote parallel voltage source inverters used to supply train auxiliaries is presented. A modular hybrid dynamic model of the entire power electronic apparatus is constructed; possible unbalanced line and load impedances are also considered. The power sharing between the converters is obtained by designing a droop controller based on local...
Multiphase drives are particularly attractive in medium and high-power applications such as railway and naval propulsion systems. In the most modern drives, a multiphase machine is driven by an IGBT inverter. This paper focuses the theoretical calculation of the power losses in multiphase inverters with an odd number of phases. This analysis could be useful for a preliminary assessment of the drive...
This article presents speed controlling for single phase induction motor. Principally, 9-level, diode-clamp inverter used to control voltages per frequency is widely used because of its high efficiency to control the motor. In this article, ARM7 model ADU7024 is used as microcontroller to generate eight pulse signals and send to the output voltage amplifier by co-connecting to the modulation module...
This paper presents design and implementation of voltage source inverter type SVPWM for control a speed of induction motor. This scheme leads to be able to adjust the speed of the motor by control the frequency and amplitude of the stator voltage, the ratio of stator voltage to frequency should be kept constant. The model of control system is implemented in real time Xilinx FPGA XC3S 400E and PI controller...
Photovoltaic power supplied to the utility grid is gaining more and more visibility while the world's power demand is increases. Growing demand, advancements in semiconductor technology and magnetic materials such as high frequency inductor cores, has a significant impact on PV inverter topologies and their efficiencies, on the improvement of the control circuits on the potential of costs reduction...
This paper presents a realization of the space-vector pulse-width modulation (SVPWM) strategy for control system induction motor (IM). In this paper is presented a space vector PWM algorithm for four switch three phase inverters (B4, FSTPI) based on the one for six switch three phase inverters (B6, SSTPI) (principle of similarity) where the ???? plan is divided into 6 sectors and the formation of...
In this paper, a new scheme for three-level voltage space vector generation is proposed. In this work, the three-level inverter topology is realized by feeding an open winding induction motor with two two-level inverters, fed from a single dc source having the magnitude half compared to the NPC three-level inverter. Compared to existing three-level inverter topologies for open-end winding induction...
This paper proposes a digital implement method of selective harmonic elimination pulse width modulation (SHEPWM) based on digital signal processor (DSP). First, the switching angles for eliminating selective harmonics are calculated with computer-aided software, and functional relationships between modulation indexes and switching angles are obtained. The curve fitting technique is then used to fit...
Power dissipation has been pointed out as the main limiting factor for the scaling of future CMOS circuits. Due to technology scaling, a large number of repeaters are being used in on-chip communication networks and they contribute a significant portion of the total chip power. Therefore, in this work we have characterized the leakage, short circuit and switching power dissipation for the repeaters...
This paper describes a new configuration of the single-phase seven-level voltage source inverter. The proposed inverter based on modified H-bridge converter. The inverter is built of conventional H-bridge inverter and two bidirectional switches and three bulk capacitor banks. To validate the proposed inverter, a low power prototype inverter has been designed and implemented; analytical, simulation...
The multilevel inverter utilization have been increased since the last decade. These new type of inverters are suitable in various high voltage & high power application due to their ability to synthesize waveforms with better harmonic spectrum and faithful output. This paper presents, two proposed scheme adopting the multicarrier pulse width modulation concept. The multicarrier pulse width modulation...
Wind is one of the most abundant and environment friendly energy sources among renewable power sources. This paper aims to provide an efficient, reliable and cost effective model for off grid wind power solution for small industries, homes, Base transceiver station BTS and remote rural areas. Primary focus is on the design of an efficient and intelligent charge controller that utilizes maximum wind...
This paper proposes a new extended boost quasi Z-source inverter (ZSI) and a simple modulation and control method based on one-cycle control for controlling a grid connected PEM fuel cell energy system. ZSIs are gaining popularity. Similarly one-cycle controllers are becoming popular due to their simplicity, ease of implementation and fast response. However, this control method has not been developed...
This paper proposes a new space vector PWM technique for four-switch three-phase inverters (FSTPI) under DC-link voltage ripple condition with the optimization of the amplitude of first harmonic output voltage. The proposed algorithm is based on the establishment of quasi-space-vectors with their maximum length and modulation technique, which is simulated the technique for six-switch three-phase inverters...
A new dual-base triggered SCR is presented. By adjusting the device sizings in the trigger circuit, the designer sets the trigger voltage to an application appropriate-value. The turn on time is comparable to that of DTSCRs fabricated in the same technology node, but the leakage is orders of magnitude lower.
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