• Vishnupriya murugesan

Step by Step design of Buck Converter in MATLAB





Design of Buck Converter in MATLAB


This video explain the step by step design and matlab implementation of buck converter in MATLAB Simulink. design of inductor and capacitor for buck converter in MATLAB. Simulation analysis of buck converter with various load conditions also explained.


With the use of digital controller design and modelling, a DC-DC buck converter's voltage regulation may be kept consistent regardless of changes in load current or source voltage. Components for the power stage can be selected with the least amount of output voltage ripple and within acceptable power loss ranges with the use of simulation. Before implementing a controller and building hardware, power electronics engineers can analyse and verify their design decisions with a closed-loop simulation of the power stage and controller.


Incorporating simulation into the design process of a power converter can help with the following:


Building a Voltage Regulator with Feedback


Simultaneous RLC part and controller optimization


Quantifying the static and dynamic properties of semiconductor switches


Power quality and dynamic performance analysis


Developing a working model of the digital controller and programming it into an embedded microprocessor or field-programmable gate array


To ensure your converter works as intended before beginning hardware testing, you may design, verify, and build it with the help of simulation using the control system design software Simulink®.


One option is to:


Use generic circuit components or a premade Buck Converter block to simulate the power step.


Model the converter with varying degrees of accuracy, simulating the system's dynamics with an average model, the switching characteristics with a behavioural model, and the parasitics and design details with a thorough nonlinear switching model.


Create, simulate, and evaluate various controller topologies, such as voltage mode control and current mode control.


Use AC frequency sweeps or system identification to apply classical control techniques like interactive loop shaping with Bode and root-locus graphs to nonlinear converter models with switching effects.


Use automated tuning techniques to fine-tune controller gains in a single or many feedback loops. Create controllers with a gain schedule to handle transitions between operating points.


The performance of a switching power supply may be modelled and the effects of component tolerances and fault occurrences evaluated.


Simulating a system with a DC-DC power converter as a component, such as a rectifier or starting generator, allows you to assess the buck converter's power quality in context.


In order to rapidly prototype control algorithms on a real-time target computer or to implement them on a microcontroller or FPGA, you may have them generated as C or HDL code.


To validate a controller using hardware-in-the-loop simulation, it is necessary to generate C or HDL code from circuit models to a real-time target computer.

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