scholarly journals Investigation of Closed Loop Current Control Strategies for Bridgeless Interleaved Sepic Converter

2014 ◽  
Vol 3 (3) ◽  
pp. 63-70
Author(s):  
Sreemallika R ◽  
Seyezhai R
Keyword(s):  
Closed Loop ◽  
Control Strategies ◽  
Current Control ◽  
Loop Current

scholarly journals Structures of vector control of n-phase motor drives based on generalized Clarke transformation

2016 ◽  
Vol 64 (4) ◽  
pp. 865-872
Author(s):  
M. Janaszek
Keyword(s):  
Vector Control ◽  
Control Strategies ◽  
Open Loop ◽  
Current Control ◽  
Loop Current ◽  
Control Structures ◽  
Clarke Transformation ◽  
Drive Systems ◽  
Novel Concept ◽  
Multi Phase

Abstract The paper presents vector control structures for n-phase AC motors derived from generalized Clarke transformation. In contrast to known works, where authors operate on generalized formulas of the Clarke transformation, in this work, only a number of actually used phases, of mostly industrial purposes, are considered (n = 5, 6, 2×3). This allows to perform control calculations in stationary orthogonal coordinates aβ or rotating dq. There are implementations of different control strategies: ROC (rotor-oriented control) or FOC (field-oriented control). Next, the paper presents the novel concept of a voltage modulator designed for multi-phase drive systems. Operation of the modulator is based on the extended Clarke transformation for multiphase systems. A mathematical model of the multiphase voltage modulator, operating in open-loop and closed-loop current control has been presented. Some selected oscillograms of voltage and current waveform, which illustrate properties of proposed control structures have been presented.

scholarly journals Hybrid Synchronized PWM Schemes for Closed-Loop Current Control of High-Power Motor Drives

2017 ◽  
Vol 64 (9) ◽  
pp. 6920-6929 ◽  
Author(s):  
Haitao Yang ◽  
Yongchang Zhang ◽  
Guofeng Yuan ◽  
Paul D. Walker ◽  
Nong Zhang
Keyword(s):  
High Power ◽  
Closed Loop ◽  
Current Control ◽  
Motor Drives ◽  
Loop Current

scholarly journals Design and Control of a Grid-connected Seven Level Inverter for Photovoltaic Applications

2019 ◽  
Vol 3 (1) ◽  
pp. 21-27
Author(s):  
Francis Mulolani ◽  
Francis Kafata ◽  
Esau Zulu
Keyword(s):  
Closed Loop ◽  
Pulse Width Modulation ◽  
Harmonic Distortion ◽  
Pi Controller ◽  
Current Control ◽  
International Standards ◽  
Control Technique ◽  
Loop Current ◽  
Grid Synchronization ◽  
Synchronous Reference Frame

This paper presents the design and closed-loop current control of a grid connected seven-level, 3-phase diode-clamped multilevel inverter for Photovoltaic (PV) applications. The proposed closed loop current control technique is based on the voltage-oriented proportional integral (PI) controller theory. The modulation technique used is level-shifted-carrier sinusoidal pulse width modulation (SPWM). The gain values of PI controller were selected to achieve good current quality and dynamic response. Grid synchronization was achieved by using a synchronous-reference frame phase-locked loop (SRF-PLL). Matlab/Simulink was used for the control system design and simulation. The simulation results show that a 1.34% total harmonic distortion (THD) of the output current was achieved which is within the allowable current distortion limits by international standards. The stability of the system was analyzed using pole-zero mapping and root locus.

Active Power Filter Control Strategy With Implicit Closed-Loop Current Control and Resonant Controller

2013 ◽  
Vol 60 (7) ◽  
pp. 2721-2730 ◽  
Author(s):  
Mauricio Angulo ◽  
Domingo A. Ruiz-Caballero ◽  
Jackson Lago ◽  
Marcelo Lobo Heldwein ◽  
Samir Ahmad Mussa
Keyword(s):  
Control Strategy ◽  
Closed Loop ◽  
Active Power Filter ◽  
Active Power ◽  
Current Control ◽  
Loop Current ◽  
Power Filter ◽  
Resonant Controller
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