Cooling Strategies for Greenhouses in Summer: Control of Fogging by Pulse Width Modulation [PDF]
, 2008 The possibilities for improving the control of greenhouse fogging systems, were studied by comparing several combinations of ventilation cooling techniques, shade screening and low-pressure fogging.
A. Perdigones +24 more
core +2 more sources
Intensity Distribution of the Shaped Femtosecond Laser Pulse by Step Phase Modulation
Nantong Daxue xuebao. Ziran kexue ban, 2020 The intensity distribution of the step phase shaped femtosecond laser pulse by ultra-fast pulse shaping technique is studied. The results show that two sub-pulses with variable intensity can be developed from a Gaussian laser pulse by adjusting the step ...
HUANG Yunxia;JI Xianming;XU Shuwu
doaj +1 more source
Hybrid Space Vector PWM Strategy for Three-Phase VIENNA Rectifiers
Sensors, 2022 Vienna rectifiers are widely used, but they have problems of zero-crossing current distortion and midpoint potential imbalance. In this paper, an improved hybrid modulation strategy is proposed.
Yaodong Wang +3 more
doaj +1 more source
Variability of the Pulsed Radio Emission from the Large Magellanic Cloud Pulsar PSR J0529-6652 [PDF]
, 2012 We have studied the variability of PSR J0529-6652, a radio pulsar in the LMC, using observations conducted at 1390 MHz with the Parkes 64-m telescope.
Altemose, Dean +3 more
core +3 more sources
A Chaotic Pulse-Time Modulation Method for Digital Communication
Abstract and Applied Analysis, 2012 We present and investigate a method of chaotic pulse-time modulation (PTM) named chaotic pulse-width-position modulation (CPWPM) which is the combination of pulse-position-modulation (PPM) and pulse-width modulation (PWM) with the inclusion of chaos ...
Nguyen Xuan Quyen +2 more
doaj +1 more source
Shaft Voltage Reduction Method Using Carrier Wave Phase Shift in IPMSM
Energies, 2021 Common-Mode Voltage (CMV) induces shaft voltage and bearing current due to the electrical interaction with the parasitic capacitance of the motor. CMV, shaft voltage, and bearing current are considered the major causes of bearing fault.
Jun-Hyuk Im +3 more
doaj +1 more source
Generalized inverses applied to Pulse Width Modulation for static conversion: a first study [PDF]
, 2013 This paper points out the generic matrix approach to design Pulse Width Modulation strategies of three-phase Voltage Source Inverters. This well-known problem has infinitely many solutions, and many modulation methods already exist.
Berkoune, Karima +5 more
core +4 more sources
Modulation in Voltage Source Inverters: An Algebraic Approach
IEEE AccessPulse width modulation in voltage source inverters with an arbitrary number of phases is analyzed in this paper. The problem is treated as purely algebraic, without any use of space vectors.
Spasoje Miric +2 more
doaj +1 more source
Pulse-width modulation multiplier Patent [PDF]
, 1970 Pulse duration modulation multiplier ...
Carlson, A. W., Furciniti, C. A.
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Wavelength conversion and parametric amplification of optical pulses via quasi-phase-matched FWM in long-period Bragg silicon waveguides [PDF]
, 2014 We present a theoretical analysis supported by comprehensive numerical simulations of quasi phase-matched four-wave mixing (FWM) of ultrashort optical pulses that propagate in weakly width-modulated silicon photonic nanowire gratings.
Driscoll, Jeffrey B. +5 more
core +2 more sources