Results 11 to 20 of about 200,578 (202)

A General Pulse Width Modulation Method for Zero-Voltage-Switching Active-clamping Three-phase Power Converters: Edge Aligned Pulse Width Modulation (EA-PWM)

open access: yesIEEE Open Journal of Power Electronics, 2020
A general PWM method for soft-switching three-phase power converters-Edge Aligned PWM (EA-PWM) is proposed. It aligns all the high loss commutation instants of the converter bridges in a switching cycle at the same instant so that all the switches of the
Keyan Shi, Jinyi Deng, Dehong Xu
doaj   +1 more source

Modeling and simulation of PMSM control system based on SVPWM [PDF]

open access: yes, 2008
The paper introduces the basic principle of space vector pulse width modulation simply and expatiates a method for implementing space vector pulse width modulation in detail based on MATLAB/SIMULINK, designs modeling and simulation of AC servo system ...
Guo, Y, Jin, J, Wang, Z, Zhan, Y, Zhu, J
core   +1 more source

Passive Mode-Locking of Monolithic InGaAs/AlGaAs Double Quantum Well Lasers at 42GHz Repetition Rate [PDF]

open access: yes, 1990
Pulse trains with a 42GHz repetition rate were generated by monolithic InGaAs/AlGaAs double quantum well lasers at a wavelength of 985 [angstroms]. The cavity was electrically divided into three regions, one providing gain and the other two providing ...
Eng, L., Sanders, S., Yariv, A.
core   +1 more source

Time domain add-drop multiplexing scheme enhanced using a saw-tooth pulse shaper [PDF]

open access: yes, 2009
We experimentally demonstrate the use of saw-tooth optical pulses, which are shaped using a fiber Bragg grating, to achieve robust and high performance time-domain add-drop multiplexing in a scheme based on cross-phase (XPM) modulation in an optical ...
Boscolo   +11 more
core   +1 more source

Pulse forming in an AM mode-locking hybrid TEA-CO2 laser [PDF]

open access: yes, 1986
We performed an experimental study on the pulse forming mechanism in an AM mode-locked hybrid TEA-CO2 laser by means of “injection mode-locking”. The results show that bandwidth limited pulses will only be reached within a small - critical - range of ...
Bonnie, R.J.M., Goor, F.A. van
core   +4 more sources

Novel Asymmetrical Pulse Width Modulation Method

open access: yesMATEC Web of Conferences, 2017
The paper proposes new asymmetrical PWM that can be used for operation of multilevel inverters. The working and construction principle of this PWM is demonstrated on 13-level PWM signal that is applied to nine-level inverter and operates it as 13-level ...
Baimel Dmitry, Tapuchi Saad, Baimel Nina
doaj   +1 more source

Modified Discontinuous Pulsewidth Modulation Approach With Independent Phase Loss Adjustment for Voltage Source Converters

open access: yesIEEE Access, 2023
This paper presents an efficient independent phase switching loss reduction technique for 2-level 3-phase voltage source inverters. A modified carrier-based pulse-width modulation algorithm, named per-phase discontinuous pulse-width modulation, is used ...
Minh-Hoang Nguyen   +2 more
doaj   +1 more source

Coordinate strategy of dual-pulse-width-modulation converter based on direct power control with load power feed-forward

open access: yesMeasurement + Control, 2020
The common dual-pulse-width-modulation converter adopts the independent method to control the rectifier and inverter, which has the defects including direct current voltage fluctuation, slow system response and so on.
Bo Fan   +3 more
doaj   +1 more source

Control and Stabilization of Centimeter Scale Glow Discharge in Ambient Air Using Pulse-Width Modulation

open access: yesIEEE Access, 2020
Re-pulsing glow discharges in atmospheric-pressure air were experimentally investigated using a push-pull generator with pulse-width modulation. Discharges were ignited as a spark-glow discharge sequence and sustained in a glow regime after ignition in a
Vladislav Gamaleev   +2 more
doaj   +1 more source

Analysis of Kapitza-Dirac diffraction patterns beyond the Raman-Nath regime [PDF]

open access: yes, 2009
We study Kapitza-Dirac diffraction of a Bose-Einstein condensate from a standing light wave for a square pulse with variable pulse length but constant pulse area.
Adams   +24 more
core   +1 more source

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