Izvedba sinhronega stikalnega pretvornika navzdol z mikrokrmilnikom družine STM32

diplomsko delo

Patrik Kežman (Author), Marko Jankovec (Mentor)

Abstract

Namen diplomskega dela je spoznati in raziskati sposobnosti perifernih enot, zlasti HRTIM časovnika mikrokrmilnika družine STM32, ter demonstrirati delovanje te enote za krmiljenje stikalnega pretvornika napetosti. V delu smo predelali delovanje pretvornikov, preučili periferije mikrokrmilnika in na podlagi tega izdelali prototipno vezje ter ga preizkusili. Vezje smo zatem nadgradili in izdelali tiskanino. Hkrati smo spisali programsko kodo za krmiljenje pretvornika. Uspelo nam je izdelati sinhroni stikalni pretvornik navzdol s stikalno frekvenco 250 kHz, spremenljivo izhodno napetostjo med 0 in 21 V ter nastavljivo tokovno limito do xx A. Izvedli smo predčasno zapiranje spodnjega MOS-FET-a za dosego prekinjenega načina delovanja pri nižjih bremenskih tokovih in tudi izpuščanje pulzov v primeru, ko na izhodu ni bremena.

Keywords

stikalni pretvorniki;pretvorniki navzdol;sinhroni pretvorniki;mikrokrmilniki;časovniki;visokošolski strokovni študij;Aplikativna elektrotehnika;diplomske naloge;

Data

Language:	Slovenian
Year of publishing:	2023
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FE - Faculty of Electrical Engineering
Publisher:	[P. Kežman]
UDC:	621.3(043.2)
COBISS:	165890307
Views:	38
Downloads:	6
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Realization of a synchronous buck converter with a STM32 family microcontroller
Secondary abstract:	The goal of this thesis is to learn and investigate the capabilities of the peripheral units, in particular the HRTIM timer of the STM 32 family microcontroller, and to demonstrate the operation of this unit for controlling a switching voltage converter. In this work, the operation of the converters and the peripherals of the microcontroller, have been studied and, on this basis, a prototype circuit has been built and tested. The circuit was then upgraded and a printed circuit board was produced. At the same time, we also have written the program code to control the converter. We have succeeded in designing a synchronous switching down converter with a switching frequency of 250 kHz, a variable output voltage between 0 and 21 V and an adjustable current limit of up to 5 A. We have also implemented the premature switch of the lower MOS FET to achieve discontinuous operation at lower load currents, and implemented pulse skipping in the case where there is no load at the output.
Secondary keywords:	Switching converter;step-down converter;synchronous converter;microcontroller;timer;comparator;
Type (COBISS):	Bachelor thesis/paper
Study programme:	1000315
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za elektrotehniko
Pages:	X, 53 str.
ID:	19909019