A new single-carrier sensor-less pulsewidth modulation (PWM) method using suggested pseudo reference functions is proposed for packed U-cell (PUC) converter to improve performance and reliability of the PUC converter. It composed one PWM carrier signal two functions. By employing method, dc capacitor voltage ripple substantially decreased, faster balancing obtained. Moreover, power losses are e...

ABSTRACT: New symmetrical multilevel inverter topology with reduced number of power electronic switches is introduced in this paper, which results in reduction of installation area, converter cost, losses, and have simplicity of control system. The proposed topology consists of series connected sub multilevel inverter blocks. Principles of operation and switching functions are well analyzed. Si...

This paper proposes a feed-forward control in a halfbridge resonant dc link inverter. The configuration of feed-forward control is based on synchronous sigma-delta modulation and the halfbridge resonant dc link inverter consists of two inductors, one capacitor and two power switches. The simulation results show the proposed technique can reject non-ideal dc bus improving the total harmonic dist...

This paper presents a new winding with low higher spatial harmonics content. enables the elimination of fifth harmonic, as most significant, in three-phase and third harmonic two-phase symmetrical winding. The suppression is particularly evident number slots per pole phase qs = 2. factors for order ν 6 k ± 1 case winding, 4 1, 3, 5, …, will be equal to zero. A measurement was used evaluate cont...

In this paper, a boost converter with a clamp circuit is proposed for high intensity discharge (HID) lamp application. The clamp circuit provides zero voltage turn on for both main and clamp switches. Compared to conventional boost converters, the proposed converter has the following advantages: (i) high voltage gain without suffering from extreme duty ratio, (ii) low stress on the switches and...

Transformerless (TL) grid-connected photovoltaic (PV) inverters with a common-ground (CG) circuit architecture exhibit some excellent features in removing the leakage current concern and improving overall efficiency. However, ability to cope wide range of input voltage changes while maintaining output single power conversion stage is key technological challenge. Considering this, article at han...

This paper presents detailed modeling and simulation of a compensator for Load balancing and harmonics Compensation based on a five-level cascaded H-bridge multilevel voltage source inverter. This type of compensator, which is installed in parallel with the load, is usually referred to as the shunt active power filters (APF). Nowadays use of high voltage non-linear loads are widely used in indu...

The Multilevel Inverter topology is advantageous in high-power and power-quality demanding application without use of transformer with reduced harmonic distortion. This paper explain the basic type of Multilevel Inverter such as diode clamped multilevel inverter (neutral point clamped), flywheel capacitor multilevel inverter (capacitor clamped), cascade multilevel inverter also the modulation a...

Unidirectional flow is the simplest phenomenon of fluid mechanics. Its mathematical description, the Dirichlet problem for Poisson’s equation in two dimensions with constant forcing, arises in many physical contexts, such as the torsion of elastic beams, first solved by de Saint-Venant for complex shapes. Here the literature is unified and extended by identifying 17 physical analogies for unidi...