A novel implementation of digital control strategy for multilevel inverters using FPGA Wavect controller

2017 ◽  
Author(s):  
Chinmayi ◽  
B G Shivaleelavathi
Keyword(s):  
Control Strategy ◽  
Digital Control ◽  
Multilevel Inverters

scholarly journals Analysis, design and simulation of digital controlled symmetrical seven levels inverter

2018 ◽  
Vol 69 (3) ◽  
pp. 233-238
Author(s):  
Cajethan M. Nwosu ◽  
Cosmas U. Ogbuka ◽  
Stephen E. Oti
Keyword(s):  
Control Strategy ◽  
Digital Control ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Multilevel Inverter ◽  
Multilevel Inverters ◽  
Switching Losses ◽  
Analysis Design ◽  
Solar Powered ◽  
Inverter Topology

Abstract An analysis, design and simulation of digital controlled symmetrical seven levels inverter is presented in this paper. Against the contemporary use of two asymmetrical DC sources with two H-bridge cells to generate seven levels inverter two DC sources of equal voltage ratings are used through digital control strategy to realize seven levels output voltage. By utilizing limited number of active switching components and avoiding the usual complex PWM control techniques for multilevel inverters by way of digital control strategy, high efficiency multilevel inverter systems due to reduction in total harmonic distortion and switching losses is guaranteed. Owing to symmetry of the H-bridge cells, a simple and single programmed counter built around J-K flip is required irrespective of number of cascades. The analyzed and designed system has been simulated in MATLAB/SIMULINK environment. With an R-L load of 200 Ω and 200 mH, improved total harmonic distortions (THDs) for the inverter current and voltage are 7.59% and 16.89% respectively. The obtained results show that the control-circuit-based multilevel inverter topology is most suited for applications in solar powered inverter systems.

scholarly journals Event-Focused Digital Control to Keep High Efficiency in a Wide Power Range in a SiC-Based Synchronous DC/DC Boost Converter

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2154
Author(s):  
María R. Rogina ◽  
Alberto Rodríguez ◽  
Aitor Vázquez ◽  
Diego G. Lamar ◽  
Marta M. Hernando
Keyword(s):  
Control Strategy ◽  
Digital Control ◽  
High Efficiency ◽  
Wave Mode ◽  
Power Losses ◽  
Control Approach ◽  
Zero Voltage Switching ◽  
Zero Voltage ◽  
Conduction Mode ◽  
Voltage Switching

This paper is focused on the design of a control approach, based on the detection of events and changing between two different conduction modes, to reach high efficiency over the entire power range, especially at medium and low power levels. Although the proposed control strategy can be generalized for different topologies and specifications, in this paper, the strategy is validated in a SiC-based synchronous boost DC/DC converter rated for 400 V to 800 V and 10 kW. Evaluation of the power losses and current waveforms of the converter for different conduction modes and loads predicts suitable performance of quasi-square wave mode with zero voltage switching (QSW-ZVS) conduction mode for low and medium power and of continuous conduction Mode with hard switching (CCM-HS) for high power. Consequently, this paper proposes a control strategy, taking advantage of digital control, that allows automatic adjustment of the conduction mode to optimize the performance for different power ranges.

scholarly journals Design and digital implementation of power control strategy for grid connected photovoltaic inverter

2019 ◽  
Vol 10 (3) ◽  
pp. 1564 ◽  
Author(s):  
Linda Hassaine ◽  
Mohamed Rida Bengourina
Keyword(s):  
Phase Shift ◽  
Power Control ◽  
Control Strategy ◽  
Digital Control ◽  
Optimization Design ◽  
Power Calculation ◽  
Digital Implementation ◽  
Grid Voltage ◽  
Phase Shift Angle ◽  
Shift Angle

<p class="Abstract">This paper presents the optimization design and a detailed implementation in FPGA (Field-Programmable Gate Array) of a power control strategy. This strategy is based on the phase shift angle of the inverter output voltage with respect to the grid voltage and DSPWM (Digital Sinusoidal Pulse Width Modulation) patterns “Phase shift angle-DSPWM” for an inverter for photovoltaic system connected to the grid. The proposed control can synchronize a sinusoidal inverter output current with a grid voltage and control the power injected into the grid. Detailed development of a digital controller with lower hardware and computation requirement is proposed. Description on the digital implementation of the A/D converter, the PI compensator, the phase shift and the DPWM, is provided. This digital control exhibit simplicity, reduction of the memory requirements and power calculation for the control. The functional structure of this system with digital control has been validated with simulations and experimental results.</p>

scholarly journals Digital Control Strategy for Single-phase Voltage-Doubler Boost Rectifiers

2012 ◽  
Vol 12 (4) ◽  
pp. 623-631 ◽  
Author(s):  
Young-Hoon Cho ◽  
Hyung-Soo Mok ◽  
Jun-Keun Ji ◽  
Jih-Sheng Lai
Keyword(s):  
Control Strategy ◽  
Digital Control ◽  
Single Phase ◽  
Phase Voltage ◽  
Voltage Doubler

An Optimal Current Control Strategy for Asymmetrical Hybrid Multilevel Inverters

2018 ◽  
Vol 54 (5) ◽  
pp. 4425-4436 ◽  
Author(s):  
Salvatore Foti ◽  
Salvatore De Caro ◽  
Giacomo Scelba ◽  
Tommaso Scimone ◽  
Antonio Testa ◽  
...  
Keyword(s):  
Control Strategy ◽  
Current Control ◽  
Multilevel Inverters ◽  
Optimal Current
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