scholarly journals Simplified cascade multiphase DC-DC buck power converter for low voltage large current applications: part I --- steady-state analysis

2021 ◽  
Vol 12 (3) ◽  
pp. 1708
Author(s):  
Anand Bannet Ganesen ◽  
Nungky Prameswari ◽  
Falah Kharisma Nuraziz ◽  
Arwindra Rizqiawan ◽  
Pekik Argo Dahono
Keyword(s):  
Steady State ◽  
Power Converters ◽  
Low Voltage ◽  
Power Converter ◽  
Steady State Analysis ◽  
Voltage Ratio ◽  
Large Current ◽  
Duty Cycles ◽  
Cascade Connection ◽  
Basic Performance

This paper presents a new simplified cascade multiphase DC-DC buck power converter suitable for low voltage and large current applications. Cascade connection enables very low voltage ratio without using very small duty cycles nor transformers. Large current with very low ripple content is achieved by using the multiphase technique. The proposed converter needs smaller number of components compared to conventional cascade multiphase DC-DC buck power converters. This paper also presents useful analysis of the proposed DC-DC buck power converter with a method to optimize the phase and cascade number. Simulation and experimental results are included to verify the basic performance of the proposed DC-DC buck power converter.

scholarly journals High Step-up Coupled Inductor Inverters Based on qSBIs

Energies ◽  
2019 ◽  
Vol 12 (15) ◽  
pp. 3032 ◽  
Author(s):  
Hongchen Liu ◽  
Xi Su ◽  
Junxiong Wang
Keyword(s):  
Steady State ◽  
High Voltage ◽  
Low Voltage ◽  
Duty Ratio ◽  
Voltage Gain ◽  
Passive Components ◽  
Steady State Analysis ◽  
High Voltage Gain ◽  
Voltage Stress ◽  
Working Principle

In this paper, two types of high step-up coupled inductor inverters based on qSBIs (quasi- switched boost inverters) are proposed. By applying the coupled inductor to the qSBIs, the voltage gain of the proposed inverter is regulated by turn ratio and duty ratio. Thus, a high voltage gain can be achieved without the circuits operating at the extreme duty cycle by choosing a suitable turn ratio of the coupled inductor. In addition, the proposed circuits have the characteristics of continuous input current and low voltage stress across the passive components. A boost unit can be added to the proposed inverters for further improvement of the voltage gain. In this paper, the working principle, steady state analysis, and the comparisons of the proposed inverter with other impedance-source inverters are described. A 200 W prototype was created and the experimental results confirm the correctness of the analysis in this paper.

State Feedback Current Control of the Three-Phase Grid Connected Power Inverter for the Regenerative Loads

2013 ◽  
Vol 647 ◽  
pp. 935-938
Author(s):  
Marian Gaiceanu ◽  
Adriana Burlibasa ◽  
Cristian Eni ◽  
Mihaita Coman
Keyword(s):  
Steady State ◽  
Power Quality ◽  
State Feedback ◽  
Power Converters ◽  
Power Converter ◽  
Current Control ◽  
Current Loop ◽  
Three Phase ◽  
Simulation Results

Grid-connected power converters are controlled by the current loop, the voltage being delivered by the grid. The proposed state feedback current control has three components: the state feedback, the forcing component to achieve the desired state x1 and the compensating feed forward of the perturbation. Moreover, the control of the power converter, through the external DC-link voltage loop, and internal current loop, assures zero steady state error, and power quality performances. In order to prove the quality of the proposed control, a regenerative load has been used, and the corresponding simulation results are provided.

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