Integral‐series Fourier analysis of chaotic PWM patterns for common mode voltage stresses

Active Common-Mode Voltage Cancellation for Three-phase PWM Rectifierfinverter Systems based on a New Topology

After giving a summary of investigated passive and active schemes to mitigate common mode problems a modeling approach for the common mode voltage (CM voltage) is presented for three-level rectifiers. A novel Active Commonmode Voltage Cancellation (ACC) scheme is proposed, utilizing the reconstructed CM voltage to derive a simpler driving scheme as presented by previous contributions. The ACC s...

Analysis of Vector Estimating Modulation Method to Eliminate Common Mode Voltage

Abstract The problem of common mode voltage in inverters can be considered as a major issue which leads to motor bearing failures. To eliminate these voltages, proposing some methods seems to be necessary. This paper has a comparative study on estimating modulation methods of eliminating common mode voltage. The main idea of these methods is based on generation of reference vector with nearest ...

Design and Analysis of PWM-Based Two-Stage Current-Mode Multiphase Voltage Doubler

Near State PWM Algorithm with Reduced Switching Frequency and Reduced Common Mode Voltage Variations for Vector Controlled Induction Motor Drive

In this paper a Near State Pulse Width Modulation (NSPWM) algorithm with reduced switching frequency is presented for vector controlled induction motor drives for reduced common mode voltage/currents. The proposed algorithm utilizes a group of three neighbor voltage vectors to construct the reference voltage space vector. In the proposed algorithm in each sector any one of the phases is clamped...

Projective Fourier analysis for patterns

Identifying PSL(2,C) as a projective group for patterns in the conformal camera model, the projective harmonic analysis on its double covering group SL(2,C) is presented in the noncompact and compact pictures–the pictures used to study different aspects of irreducible unitary representations of semisimple Lie groups. Bypassing technicalities of representation theory, but stressing the motivatio...