Results 11 to 20 of about 1,036,356 (352)

A Time-Domain Numerical Method for Multi-Conductor Coaxial Lines Using the Exact Retarded Potential Integral Equations

open access: yesIEEE Access, 2021
We present a time-domain numerical method for calculating the current propagating through coaxial lines including the radiation effect. In previous studies of transmission lines using the retarded potential integral equations (RPIE), the so-called thin ...
Shuji Kitora   +3 more
doaj   +1 more source

Novel Characterization of Si- and SiC-Based PWM Inverter Bearing Currents Using Probability Density Functions

open access: yesEnergies, 2022
The high frequency PWM voltage pulses from a two-level six-switch inverter produce a common-mode voltage in an electric machine’s windings, a fraction of which appears on the machine shaft due to electrostatic (capacitive) coupling.
Ryan Collin   +2 more
doaj   +1 more source

Experimental Study of Radiated Emission Due to Secondary Common-Mode Current in Buck Converters

open access: yesApplied Sciences, 2023
High switching frequency and fast switching speed of wide bandgap power semiconductor device-based power converters may increase radiated emissions more than conventional silicon-power device-based power converters.
Shotaro Takahashi
doaj   +1 more source

Simulation-Based Design of the Common-Mode Transformer-Less Hybrid EMI Filter in DC-Fed Motor Drive Systems

open access: yesIEEE Access, 2023
This article presents a circuit simulation-based design method for common-mode (CM) transformer-less hybrid EMI filters (HEFs) to obtain the required CM current attenuation.
Shotaro Takahashi
doaj   +1 more source

A New High Gain AC-Decoupled Transformerless Inverter for Photovoltaic Applications

open access: yesJournal of Applied Science and Engineering, 2022
Transformerless inverters are prominently used in the single-phase grid-connected system due to their reduced size, weight, and high efficiency. Common-mode leakage current is the main issue of transformerless inverters, which has to be mitigated.
Sahaya A Ponrekha   +2 more
doaj   +1 more source

A Review of Modeling and Mitigation Techniques for Bearing Currents in Electrical Machines With Variable-Frequency Drives

open access: yesIEEE Access, 2022
The converter switching in variable-frequency drives can generate high frequency common mode voltage between the machine winding and the converter ground, leading to high frequency parasitic currents which can flow through the machine bearings unless ...
Wenjun Zhu   +4 more
doaj   +1 more source

Coordinated control of distributed renewable energy in bipolar DC microgrid based on modulus transformation

open access: yesEnergy Reports, 2023
The coupling between the positive and negative poles of the bipolar DC microgrid will influence the voltage control which makes it difficult to compute the parameters of the control loop independently.
Chunsheng Guo   +6 more
doaj   +1 more source

Transformerless Common-Mode Current-Source Inverter Grid-Connected for PV Applications

open access: yesIEEE Access, 2018
The use of a transformer in grid-connected photovoltaic (PV) generation systems provides isolation between the grid and the PV array, this increases the cost, weight, and the size of the system.
Hector Lopez   +4 more
doaj   +1 more source

Analysis of High-Frequency Common Mode Component Characteristics of Common Mode Peak Voltage Suppression Method for Indirect Matrix Converter

open access: yesEnergies, 2022
A variety of modulation strategies for suppressing output common-mode voltage (CMV) of indirect matrix converters (IMC) have been proposed, but most of them mainly reduce the peak of CMV by 42.3%. The frequency-domain characteristics of CMV have not been
Haiming Liu   +5 more
doaj   +1 more source

Performance optimization aspects of common mode chokes [PDF]

open access: yes, 2007
Optimization aspects of common mode chokes are presented. These are based on a behavioral model for common mode chokes and its sensitivity study. Results are used to show the influence of the designable parameters on the final performance of the choke ...
Bergsma, H.   +4 more
core   +2 more sources

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