The Adjustable Speed Drives (ADS) are generally used in industry. In most drives AC motors are applied. The standard drives used are Induction Motors (IM) and recently Permanent Magnet Synchronous Motors (PMSM) are also used. Developments in power electronics and semiconductor technology have lead to improvements in power electronic systems. Different circuit configurations namely multilevel in...

This paper proposed a new topology of symmetric single-phase multilevel inverter with the smaller number semiconductor switches and optimized low-frequency control methods to optimize Total Harmonic Distortion. A nine-level single phase output is obtained by eight active switches, four diodes capacitors from two asymmetrical dc sources. The selected harmonic order in voltage eliminated PWM (SHE...

This paper proposes an M-ary amplitude shift keying (MASK) power and information synchronous transmission system based on phase-shifted full-bridge (PSFB) for applications in wireless (WPT). The Pulse Width Modulation (PWM) waveform uses different phases to control the MOSFET inverter MASK modulation. voltage generates M transformation, forming a comprehensive flow. demodulation circuit process...

Modular multilevel converters (MMCs) have been widely used owing to their superior performance. However, the rapid switching of power electronics devices causes serious electromagnetic interference (EMI). There are a large number obvious EMI peaks in frequency spectrum carrier phase-shifted constant-switching-frequency pulse-width modulation (CSFPWM). Spreading across wider range can help reduc...

A robust controller for a single-phase Pulse-Width Modulation (PWM) inverter is designed. The single-phase PWM inverter generates an AC sinusoidal output from a DC link voltage. Robustness of the output waveform against load variations and minimum Total Harmonic Distortion (THD) are the main goals in this design. The importance of this design methodology results from the changes in the inverter...

Multiplicity of the triangular carrier signals is a criterion for extension sinusoidal pulse-width modulation, SPWM, to number output voltage levels per phase-leg in cascaded H-bridge (CHB) multilevel inverter (MLI). Considering medium and high applications where appreciable from CHB MLI needed, commensurate either classical level- or phase-shifted SPWM scheme this inevitable. High-quality wave...

In this paper, the basic algebraic properties of the optimal PWM problem for single-phase inverters are revealed. Specifically, it is shown that the nonlinear design equations given by the standard mathematical formulation of the problem can be reformulated, and that the sought solution can be found by computing the roots of a single univariate polynomial ( ), for which algorithms are readily a...

T lymphocytes were derived by E rosetting from the peripheral blood (PB) and bone marrow (BM) of 15 patients with chronic granulocytic leukemia (CGL) in the chronic phase of their disease. T cells were also obtained from 12 healthy individuals. T cells were incubated overnight either in culture medium (RPMI) or RPMI plus pokeweed mitogen (PWM). The supernatants were then recovered and the cells...