Results 21 to 30 of about 56,742 (234)

VSG Control for Cascaded Three-Phase Bridge Based Battery Inverter

open access: yesWorld Electric Vehicle Journal, 2023
With the increasing number of new energy sources connected to the grid, the unbalanced output of three-phase grid-connected inverters and the lack of no inertia and damping characteristics in the traditional microgrid control system will seriously affect
Xiaojing Qi, Jianyong Zheng
doaj   +1 more source

Speed control with low armature loss for very small sensorless brushed DC motors [PDF]

open access: yes, 2009
A method for speed control of brushed dc motors is presented. It is particularly applicable to motors with armatures of less than 1 cm3. Motors with very small armatures are difficult to control using the usual pulsewidth-modulation (PWM) approach and ...
McLeish, J.   +2 more
core   +2 more sources

Analysis and mitigation of dead time harmonics in the single-phase full-bridge PWM converters with repetitive controllers [PDF]

open access: yes, 2018
In order to prevent the power switching devices (e.g., the Insulated-Gate-Bipolar-Transistor, IGBT) from shoot through in voltage source converters during a switching period, the dead time is added either in the hardware driver circuits of the IGBTs or ...
Blaabjerg, Frede   +3 more
core   +3 more sources

Modified Phase-Shifted PWM for Cascaded Half-Bridges of Photovoltaic Application

open access: yesIEEE Access, 2020
Photovoltaic power plants are generally far away from loads such as cities and industrial zones. Moreover, long-distance power transmission for renewable energy will become an inevitable trend in the future.
Xiaoguang Diao   +5 more
doaj   +1 more source

Performance Evaluation of Pulse Width Modulation Techniques for Losses Reduction in Modular Multilevel Flying Capacitor Converter [PDF]

open access: yes, 2016
This paper presents the analysis and evaluation of power losses in a modular multilevel flying capacitor converter (MMFCC) controlled by three different pulse width modulation techniques.
Oghorada, OJK, Zhang, LI
core   +2 more sources

A Carrier-Based PWM Strategy Providing Neutral-Point Voltage Oscillation Elimination for Multi-Phase Neutral Point Clamped 3-Level Inverter

open access: yesIEEE Access, 2019
General pulse width modulation (PWM) model for multi-phase neutral point (NP) clamped (NPC) 3-level inverter (3LI) is described. A novel PWM strategy for N -phase NPC 3LI with unconditional NP voltage balance is proposed as well as its carrier-based ...
Weidong Jiang   +4 more
doaj   +1 more source

Interleaved Pulse Width Modulation Based on Modified Carrier in Parallel Operation

open access: yesIEEE Access, 2021
An interleaved pulse width modulation (PWM) can be employed in a parallel operation of three-phase converters because the interleaved PWM increases the equivalent switching frequency and significantly enhances the output current harmonics.
Hyun-Sam Jung
doaj   +1 more source

A general approach to synthesis and analysis of quasi-resonant converters [PDF]

open access: yes, 1991
A method for systematic synthesis of quasi-resonant (QR) topologies by addition of resonant elements to a parent pulse-width modulation (PWM) converter network is proposed.
Maksimović, Dragan, Ćuk, Slobodan
core   +2 more sources

Comparative analysis of principal modulation techniques for modular multilevel converter and a modified reduced switching frequency algorithm for nearest level pulse width modulation

open access: yesElectrical engineering & Electromechanics
Introduction. The Modular Multilevel Converter (MMC) is an advanced topology widely used in medium and high-power applications, offering significant advantages over other multilevel converters, including high efficiency and superior output waveform ...
M. Benboukous   +4 more
doaj   +1 more source

A Soft-Switching Control for Cascaded Buck-Boost Converters Without Zero-Crossing Detection

open access: yesIEEE Access, 2019
This paper proposes a novel soft-switching control without zero-crossing detection for the cascaded buck-boost converters (CBBCs). The proposed soft-switching control consists of two parts: soft-switching modulation and closed-loop control.
Jingrong Yu   +4 more
doaj   +1 more source

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