Adaptive Tuning System and Parameter Estimation of a Digitally Controlled Boost Converter with STM32

Renewable energy sources (RESs) are becoming increasingly important day by day to tranquilize the world’s energy crisis and consume fossil fuels in the lower rung. A microgrid system that assimilates clean and green energy-based sources such as solar, wind, and biogas is acquiring much prominence over the conventional grid-based power systems in this day and age. For the up and running of the inexhaustible energy sources in the AC power network, numerous conversions of the power sources occur. In the process of conversion, some amount of power is lost, which minimizes conversion efficiency. However, with the increasing use of DC loads and Distributed Energy Resources (DERs), DC Microgrid could be more beneficial than the conventional AC power system by avoiding several types of drawbacks. This paper demonstrates an efficient system of digitally controlled boost converter for the parallel operation in DC microgrid. Here, the converter of 2.5kW 400V is designed and implemented to validate its functioning in a Microgrid. The whole system has been simulated in MATLAB with an input voltage range of 220–380 V. It has been found that the designed converter can maintain the desired output voltage in the DC Busbar at and around 400 V. Finally, some simulation results have been presented to analyze the converter’s operational characteristics and effectiveness in the practical domain.

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Emulator of a Boost Converter for Educational Purposes

Electronics ◽

10.3390/electronics9111883 ◽

2020 ◽

Vol 9 (11) ◽

pp. 1883

Author(s):

Paula Lamo ◽

Ángel de Castro ◽

Christian Brañas ◽

Francisco J. Azcondo

Keyword(s):

Current Mode ◽

Boost Converter ◽

Project Based Learning ◽

Electronic Systems ◽

Hardware In The Loop ◽

Pulse Width Modulator ◽

Digital Pulse ◽

Digitally Controlled ◽

Field Programmable ◽

A Current

Project-based learning (PBL) is proposed for the development of a Hardware-in-the-Loop (HIL) platform and the design of its digital controller for an undergraduate course on Digital Electronic Systems. The objective for students is the design of a digitally controlled HIL Boost converter, a digital pulse-width modulator (DPWM) and a current mode controller, implemented in field-programmable gate array (FPGA) devices. To this end, the different parts of the project are developed and evaluated, maximizing the use of FPGA resources in the design of the HIL and DPWM blocks, and applying design techniques that minimize the use of the digital resources used in the design of the controller. Students are equipped with a new individualized educational experience, allowing them to test their technical competence and knowledge in an environment close to the reality of the industry.

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ADC Quantization Effects in Two-Loop Digital Current Controlled DC-DC Power Converters: Analysis and Design Guidelines

Applied Sciences ◽

10.3390/app10207179 ◽

2020 ◽

Vol 10 (20) ◽

pp. 7179

Author(s):

Catalina González-Castaño ◽

Carlos Restrepo ◽

Roberto Giral ◽

Enric Vidal-Idiarte ◽

Javier Calvente

Keyword(s):

Pulse Width Modulation ◽

Digital Signal ◽

Boost Converter ◽

Design Guidelines ◽

Current Control ◽

Control Laws ◽

Analysis And Design ◽

External Loop ◽

Digitally Controlled ◽

Average Current

This paper analyzes the presence of undesired quantization-induced perturbations (QIP) in a dc-dc buck-boost converter using a two-loop digital current control. This work introduces design conditions regarding control laws gains and signal quantization to avoid the quantization effects due to the addition of the outer voltage loop in a digital current controlled converter. The two-loop controller is composed of a multisampled average current control (MACC) in the inner current-programmed loop and a proportional-integrator compensator at the external loop. QIP conditions have been evaluated through simulations and experiments using a digitally controlled pulse width modulation (DPWM) buck-boost converter. A 400 V 1.6 kW proof-of-concept converter has been used to illustrate the presence of QIP and verify the design conditions. The controller is programmed in a digital signal controller (DSC) TMS320F28377S with a DPWM with 8.96-bit equivalent resolution, a 12-bit ADC for current sampling, and a 12-bit ADC for voltage sampling or a 16-bit ADC for voltage error sampling.

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