Nelinearni pristop k regulaciji pretvornika navzdol z uporabo polja programirljivih logičnih vrat

doktorska disertacija

Mitja Truntič (Author), Miro Milanovič (Mentor)

Abstract

V nalogi je predstavljena izvedba napetostne regulacije pretvornika navzdol z regulatorjem stanj podprtim s sistemom mehke logike. Regulacija je izvedena v programirljivem vezju FPGA (Fields Programmable Gate Array). Parametri regulatorja z mehko logiko se nastavljajo z genetskim algoritmom glede na želen dinamični odziv napetostno reguliranega pretvornika navzdol. Podan nelinearni pristop k regulaciji pretvornika navzdol je bil najprej preskušen na simulacijskem vezju, izdelanem v programskem paketu MATLAB/SIMULINK. Rezultati simulacij so potrdili, da se je s spremenljivo nastavitvijo ojačanj regulatorja stanj možno približati želenemu dinamičnemu odzivu napetostno reguliranega pretvornika navzdol, glede na fizikalne omejitve delovanja pretvornika ter zmožnosti regulatorja. Na osnovi dobljenih rezultatov iz simulacij je bilo izdelano eksperimentalno vezje, na katerem je bila preverjena nelinearna regulacija napetosti pretvornika navzdol. Regulator z ostalimi potrebnimi enotami za zajemanje digitalnih signalov iz analogno-digitalnega pretvornika ter generiranje pulznoširinskih signalov so izvedeni v programirljivem vezju FPGA. Celoten regulacijski algoritem se izračuna v 60ns, kar omogoča izvajanje v realnem času. Stikalna frekvenca napetostno reguliranega DC-DC pretvornika navzdol znaša 200KHz.

Keywords

pretvornik navzdol;regulator stanja;FPGA implementacija;nelinearno vodenje;mehka logika;genetski algoritmi;

Data

Language:	Slovenian
Year of publishing:	2009
Source:	Maribor
Typology:	2.08 - Doctoral Dissertation
Organization:	UM FERI - Faculty of Electrical Engineering and Computer Science
Publisher:	[M. Truntič]
UDC:	621.372.54(043.2)
COBISS:	245244928
Views:	3086
Downloads:	284
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Nonlinear control approach for buck converter by using field programmable gate array
Secondary abstract:	The thesis presents the implementation of fuzzy control algorithm (state controller with adjustable gains by fuzzy sets) in DC-DC Buck converter. All tasks are implemented in FPGA (Fields Programmable Gate Array). To tune the fuzzy sets parameters according to predefined dynamic response of voltage controlled buck converter genetic algorithm is used. The nonlinear voltage control of buck converter was initially tested on a simulation circuit constructed in the MATLAB/SIMULINK software package. Simulation results proved that by introducing the variable gains in state controller, predefined dynamical responses could be reached within physical limitations of the systemand limitation of the controller. Based on simulation results, an experimentally circuit was made, and used to test the buck converter nonlinear control. Digital controller with other units like A/D acquisition of digital signals and PWM unit were implemented by means of programmable FPGA circuit. With the calculation of whole control algorithm in 60 ns a real-time operation is archived. The switching frequency of buck-converter PWM unit is 200 kHz.
Secondary keywords:	buck converter;state controller;FPGA implementation;non-linear control;fuzzy logic;genetic algorithm;
URN:	URN:SI:UM:
Type (COBISS):	Dissertation
Thesis comment:	Univ. v Mariboru, Fak. za elektrotehniko, računalništvo in informatiko
Pages:	XII, 129 str.
Keywords (UDC):	applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;mechanical engineering in general;nuclear technology;electrical engineering;machinery;strojništvo;electrical engineering;elektrotehnika;
ID:	985980