The paper proposes design of voltage source inverters for renewable energy applications such as HEV. The wind and solar are growing energy sources to world this sources to be converted alternating one for grid interfacing. Conventional inverters are electronic thyristor which has some drawbacks. To improve its efficiency and performance MOSFET based inverters using controllers has been designed...

Generally, electrics devices need alternating current. But PV generators provide direct current. So, it is necessary to use inverters. Multilevel inverters seem very suitable for this task. In this paper, we present a comparative study between three multilevel inverters: 3 levels, 5 levels and 15 levels. These inverters have the same topology and are controlled by the same law: Sinusoidal Pulse...

Multilevel inverters have several advantages over the conventional two level inverters due to their lower switching frequency, reduced switching stresses, low EMI and EMC issues, ability to achieve high voltage levels, low THD etc. Multilevel inverters can synthesize the desired voltage from several levels of DC voltages. This paper presents the comparison of three level Flying capacitor and Ca...

In this paper, a simpler implementation of the well-known droop method for the control of parallel Uninterruptible Power Supply (UPS) systems is presented. In this method, in the power-sharing control scheme, the output current is calculated by software without the need for a current sensor, resulting in a simpler and cheaper structure. By doing so, the number of feedback sensors is reduced fro...

The inverters are commonly used for medium power induction heating applications. In the process of induction cooking, a disc of metal is surrounded by a copper coil through which an alternating current is made to flow. The disc has a finite diameter and thickness. It is placed at a given distance from the coil and concentric to it. Secondary current is induced in the disc and this induced curre...

This paper presents a comparative analysis of the class E and selected enhanced inverters, namely, second third harmonic group EFn, E/Fn Flat Top inverter. The inverters are designed under identical specifications evaluated against variation switching frequency (f), duty ratio (D), capacitance (k), load resistance (RL). To offer understanding, performance parameters, power output capability, ef...

This paper is to present and to compare the DTC applied to an induction motor (IM) fed by two-level and three level inverters voltage. Direct torque control (DTC) of induction motors fed by a two level inverters has drawbacks like more torque, flux and current ripples in steady state. All these drawbacks can be overcome by DTC of induction motor fed by a three level inverters. Three level inver...

Induction heating (IH) technology is very popular in domestic applications because of its efficiency and safe operating properties. Resonant inverter circuits are widely used IH systems owing to their high soft-switching capability. Among the resonant inverters systems, single-switch quasi-resonant topology generally preferred for low-cost low-output-power applications. Despite advantage invert...

Technological advancements in solar power systems necessitate highly reliable inverters with high efficiency and small size. An LLC resonant converter-based pseudo-Direct Current (DC) link offer these qualities to some extent. The circuits of conventional pseudo-DC cannot attain a zero gain handle variable frequency control which turn requires very large filters produce pure sinusoidal output v...

Multilevel inverters produce a staircase output voltage from DC voltage sources. Requiring great number of semiconductor switches is main disadvantage of multilevel inverters. The multilevel inverters can be divided in two groups: symmetric and asymmetric converters. The asymmetric multilevel inverters provide a large number of output steps without increasing the number of DC voltage sources an...