This paper presents a review and analysis of multilevel inverter topologies. Multilevel inverters are most widely used for medium-voltage high-power converter like fans, pumps and material transport drives. In this active area, different inverter topologies, circuits, advantages and drawbacks are discussed. Multilevel Inverter topologies such as diode-clamped, flyingcapacitor, cascaded H-bridge...

Abstract UPS can provide stable electrical energy for sensitive loads when severe grid disturbance happens. A neutral point clamped (NPC) three-level voltage source converter is used as the circuit topology UPS. In this study, discrete mathematical model of derived and a single loop control strategy based on predictive presented. The proposed method has simple structure fast response speed omit...

voltages and currents are induced into electronic circuit boards as electromagnetic waves are radiated on them. the strength of induction depends on the wavefront and the circuit board characteristics. in this paper, by solving maxwell’s equations using fdtd method and then by extending it by three dimensional simulation using the gpml criteria for boundary conditions and tf/sf technique, effec...

The main objective of this paper is to control the speed of an induction motor by changing the frequency using three level diode clamped multilevel inverter. To obtain high quality sinusoidal output voltage with reduced harmonics distortion, multicarrier PWM control scheme is proposed for diode clamped multilevel inverter. This method is implemented by changing the supply voltage and frequency ...

This paper presents the performance evaluation of a proposed single-phase bidirectional active neutral-point-clamped (ANPC) five-level converter (5LC) for filtering in grid-to-vehicle (G2V), vehicle-to-grid (V2G) and vehicle-to-home (V2H) applications. In system, 5LC is series-connected with an electric vehicle battery charger based on dual half-bridge DC-DC (DAHBC). A cascaded strategy proport...

This paper presents analysis, modeling, and design of a low-harmonic, isolated, active-clamped SEPIC rectifier for future avionics applications. Simpler converter dynamics, high switching frequency, zerovoltage-switching, and a single-layer transformer construction result in an efficiency of 90% and a very low total harmonic distortion over 400 -800 Hz line frequency variation.

This paper presents a complete behavioral PSpice model for IGBT transistor. A voltage dependent capacitance is modeled using a second order polynomial and “arctan” function. The simulation results for I-V static and transfer characteristics and their comparisons with datasheets are shown. The dynamic model verification is carried out using PSpice simulations and experimental measurements of the...

This paper discusses the use of high integration processes and their applications for telecommunications at microwaves. As a comparison imple-mentation techniques are detailed both in GaAs and Si technologies for active LC filters. A comparison in terms of size and cost is also made with the design of integrated negative resistance circuits.