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Showing 1 to 12 of 12 for “"SPWM"”.
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Symmetric and asymmetric multilevel inverter topologies with reduced number of switching devices structure for high power density achievement
… (MPWM), sinusoidal pulse width modulation (SPWM), modified pulse width modulation with reduced angle (MPWM-RA) and modified pulse width with low frequency triangular (MPWM-LFT) are selected to produce output voltage levels of the proposed structure. Theoretically, THD is reduced drastically …
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Design and modeling of a power conditioning system for the hybrid fuel-cell/turbine power plant.
… sinusoidal pulse width modulation (SPWM) DC/AC inverter, and an LCL filter. To regulate and stabilize the DC link voltage, DC/DC converter with PI controller is adopted. With three-phase SPWM inverter, both active and reactive power flow can be controlled. Both conventional …
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Impact of pulse width modulation schemes In eccentricity fault detection using current signature analysis
… the impact of Sinusoidal Pulse Width Modulation (SPWM) and Selective Harmonic Elimination (SHE) on diagnosing eccentricity faults in three-phase synchronous motor drives. The study involves a three-phase, 2 kW, 208 V, 1800 rpm synchronous motor driven by an inverter, which is controlled via a …
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Improving Inverter Efficiency at Low Power Using a Reduced Switching Frequency
… of switching frequency upon switching loss for a SPWM inverter is investigated. Results, from mathematical modeling, simulation and experimental implementation, show the same trend that reducing the switching frequency reduces switching loss at low power levels thus improves inverter efficiency. …
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Development of 3-phase inverter with PID voltage control
… signal that will go into the PID controller. SPWM signal is created by using the correction signal from PID controller and fed to the three-phase inverter with filter to give a sinusoidal output. Based on the result obtained, the three-phase inverter has successfully created a stable …
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High-Efficiency and High-Frequency Resonant Converter Based Single-Stage Soft-Switching Isolated Inverter Design and Optimization with Gallium-Nitride (GaN)
… stage and a sinusoidal pulse-width-modulated (SPWM) dc-ac stage. However, this two-stage configuration suffers from more components count, more complex control and tend to have lower efficiency and lower power density. Meanwhile, a large dc bus capacitor is needed to attenuate the double line …
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Switching frequency reduction in pulse-width modulated multilever converters and systems
… The Fundamental Frequency Sinusoidal PWM (FF-SPWM) control method is examined as a potential "carrier" based approach in reducing the converter switching frequency and associated losses. The performance of multi-modular parallel connected systems based on the NPC and FC converters as a …
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Parameter study of boost inverter topologies for high voltage gain
… and to develop control logic, that would supply SPWM switching signals to IGBT gates. For this project, Simple constant boost control strategy has been developed and simulated in MATLAB / Simulink. For analysis, THD of the conventional Z-source inverter is 2.3% while THD for SL Z-source inverter …
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High Efficiency Single-stage Grid-tied PV Inverter for Renewable Energy System
… another three dual-mode double-carrier based SPWM inverters are proposed. With both step-up and step-down functions, this type of inverter can achieve high efficiency in a wide range because only one switch operates at the PWM frequency at a time. Finally, the simulation and experiment results …
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Modelling, Design and Implementation of D-Q Control in Single-Phase Grid-Connected Inverters for Photovoltaic Systems used in Domestic Dwellings.
… compared with sinusoidal pulse-width-modulation (SPWM) which is often used with single-phase inverters. The second step, which is further reviewed and presented in this thesis, is the modelling of the single-phase inverter control based on the synchronous rotating frame. A mathematical analysis is …
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Modeling and Analysis of a Dynamic Voltage Regulator
<p>Increased government funding and incentives in recent years has led to an increase in the number of grid-tied renewable energy sources as their economic benefits become more renowned. Unfortunately, the outputs of these renewable resources are often highly variable, resulting in undesirable …