Tyco TX 75149 manuale d’uso

TYCO ELEC TRONIC S POWER SY STEM S 3000 SKYL INE DRIVE MESQUIT E, TX 75149 S t ability Analysis T ool User's Guide For use with Board M ounted DC-DC converters V1.3[...]

2 Cop yri ght *************************************************************************** * COPYRIGHT 2001, TYCO ELECTRONICS POWER SYSTEMS, INC. * * ALL INTERNATIONAL RIGHTS RESERVED * *************************************************************************** !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! BY USING THE [...]

3 No oral or written information or advice given by Tyco Elect ronics or its distributors, agents or employees will operate to create any warranty or guarantee or vary any provision or information herein, and you may not rely on any such information or advice. Tyco Electronics reserves the r ight to change any portion of this data, and to change th[...]

4 Intr oduction The Stab ility Analysis Tool (SAT) is a Microsof t Excel-ba sed program th at provi des a Bod e plot o f the voltag e loo p gain of a DC-D C conv erter for a v ariety of external l oads. From this plo t, infor matio n such as cross over freq uency and gain an d phase marg ins can b e obtained . In classical control theory, the stabi[...]

5 Installa tion and Usage You sh ould f irst r ead an d accept the terms o f the S AT usag e.  Download the file SAT_v1.3.xls from the Tyco Electron ics Power Systems web si te (gi ven bel ow) to a di rector y on y our c omputer .  Downl oad one or more mo dule data file(s) to the sam e director y.  You can s tart up the t ool by follow in[...]

6 Using SA T W he n you start SA T, you w ill see the w indow shown i n Figur e 1. 2 Fig. 1. SAT Introd uction and Mod ule Select ion page[...]

7 Load M odul e D ata F i l e  There ar e two she ets, " Module Selection " and " Configuration Menu " shown initiall y at the bott om left-ha nd section o f the Excel sprea dsheet. Ea ch sessi on should star t at the " Module Selection " sheet.  Click on the button This will bring the module data file import wi [...]

8  If you w ant to choose a di fferent module dat a fil e, you can al way s go back to the Module Selection sheet t o change it.  The Configuration Menu lists fiv e choic es for repr esenti ng the lo ad circui t topo logy.  The fir st config uratio n is a simpl e one w here the ou tput v o ltage i s sensed directly at the ou tput pi ns of [...]

9 C li c k to C alc u late St abi lit y model of the c apaci tor b ank. The load is modeled by the resista nce R L .  The secon d configu rati on is similar to the firs t one except tha t the voltage sense location is mov ed from the output pi ns of the module to t he load. In t his case, the vo ltage s ensed and re gula ted is not the mod ul e [...]

1 0 SAT dr aws the B ode plot of t he vol tage lo op gain on t he rig ht hal f of the page as shown in Fig ure 5. The phas e margin, w hich is a measure of sta bility, and t he gain crossover frequency , whic h is a measure of fast transi ent response, ar e also calcu lated and prese nted be low th e Bod e plot. You c an en ter yo ur note s unde r [...]

11 R load = 0.5 o hm R s1 = 1 R s2 = 5 mohm L s1 = 4 L s2 = 100 nH R a1 = 100 R a2 = 100 R a3 = 10 R b1 = 10 R b2 = 10 mohm L a1 = 1 L a2 = 1 L a3 = 1 L b1 = 10 L b2 = 10 nH C a1 = 10 C a2 = 10 C a3 = 100 0 C b1 = 1000 C b2 = 1000 µ F 6 96.6 Hz 5 2.06 degr ees Stability Analysis To ol Notep ad A rea for JFW05 0A Mod ule Please ent er the circ uit [...]

1 2  To analy ze a differen t module , you s hould s elect th e Module Selection tab at the bottom o f the Excel W orks heet to go back to the firs t page and loa d the data file for t he new mod ule. Not e that th e new data f ile w ill ov erwr ite the old one belong ing to the JF W 050A. If y ou want to keep y our analysi s results for the JF [...]

1 3 cust omer app lication. SAT can be used to assess the common-mode stability characteristics of a parallel ed conv erter syste m by analyzing an equiv alent single-m odule sy stem. The single- module equi vale nt is obtaine d by scaling the load by the number of parallel ed modules . For example, i n a two m odule par allel sys tem, the l oad is[...]

1 4 Limitations of SA T Alth ough S AT is a p owerfu l too l, plea se ke ep in mind the followin g : 1. The lo op gain Bod e plo t and ph ase mar gin pre dicted by SA T are vali d w hen the module is op erating i n continu ous conducti on mode (CCM). Theref ore, make sure that R L is su ff ici ently lo w enoug h to g uarant ee a lo ad cur rent th a[...]

1 5 T r oubl esho oting If you encou nter the follow ing message w hen running SA T, there are two possibilities f or the error messa ge. 1. Some o f the parame ters y ou entered for y our network are no nnumeric. 2. Yo u have n ot enab led the Ana lysis T ool pack an d Analys is Too lpack – VB A in your Excel env iron ment as desri bed in page 5[...]