Qucs-core  0.0.19
trafo.cpp
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00001 /*
00002  * trafo.cpp - trafo class implementation
00003  *
00004  * Copyright (C) 2003, 2004, 2005, 2008, 2011 Stefan Jahn <stefan@lkcc.org>
00005  *
00006  * This is free software; you can redistribute it and/or modify
00007  * it under the terms of the GNU General Public License as published by
00008  * the Free Software Foundation; either version 2, or (at your option)
00009  * any later version.
00010  *
00011  * This software is distributed in the hope that it will be useful,
00012  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  * GNU General Public License for more details.
00015  *
00016  * You should have received a copy of the GNU General Public License
00017  * along with this package; see the file COPYING.  If not, write to
00018  * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
00019  * Boston, MA 02110-1301, USA.
00020  *
00021  * $Id$
00022  *
00023  */
00024 
00025 #if HAVE_CONFIG_H
00026 # include <config.h>
00027 #endif
00028 
00029 #include "component.h"
00030 #include "trafo.h"
00031 
00032 using namespace qucs;
00033 
00034 trafo::trafo () : circuit (4) {
00035   type = CIR_TRAFO;
00036 }
00037 
00038 void trafo::initSP (void) {
00039   nr_double_t  t = getPropertyDouble ("T");
00040   nr_double_t  d = t * t + 1.0;
00041   nr_double_t z1 = t * t / d;
00042   nr_double_t z2 = t / d;
00043   nr_double_t z3 = 1 / d;
00044   allocMatrixS ();
00045   setS (NODE_1, NODE_1,  z1); setS (NODE_1, NODE_2,  z2);
00046   setS (NODE_1, NODE_3, -z2); setS (NODE_1, NODE_4,  z3);
00047   setS (NODE_2, NODE_1,  z2); setS (NODE_2, NODE_2,  z3);
00048   setS (NODE_2, NODE_3,  z1); setS (NODE_2, NODE_4, -z2);
00049   setS (NODE_3, NODE_1, -z2); setS (NODE_3, NODE_2,  z1);
00050   setS (NODE_3, NODE_3,  z3); setS (NODE_3, NODE_4,  z2);
00051   setS (NODE_4, NODE_1,  z3); setS (NODE_4, NODE_2, -z2);
00052   setS (NODE_4, NODE_3,  z2); setS (NODE_4, NODE_4,  z1);
00053 }
00054 
00055 void trafo::initDC (void) {
00056   setVoltageSources (2);
00057   allocMatrixMNA ();
00058   voltageSource (VSRC_1, NODE_1, NODE_4);
00059   voltageSource (VSRC_2, NODE_2, NODE_3);
00060 }
00061 
00062 void trafo::initAC (void) {
00063   nr_double_t t = getPropertyDouble ("T");
00064   setVoltageSources (1);
00065   allocMatrixMNA ();
00066   setB (NODE_1, VSRC_1, -1); setB (NODE_2, VSRC_1, +t);
00067   setB (NODE_3, VSRC_1, -t); setB (NODE_4, VSRC_1, +1);
00068   setC (VSRC_1, NODE_1, +1); setC (VSRC_1, NODE_2, -t);
00069   setC (VSRC_1, NODE_3, +t); setC (VSRC_1, NODE_4, -1);
00070   setD (VSRC_1, VSRC_1, +0);
00071   setE (VSRC_1, 0);
00072 }
00073 
00074 void trafo::initTR (void) {
00075   initAC ();
00076 }
00077 
00078 // properties
00079 PROP_REQ [] = {
00080   { "T", PROP_REAL, { 1, PROP_NO_STR }, PROP_POS_RANGE }, PROP_NO_PROP };
00081 PROP_OPT [] = {
00082   PROP_NO_PROP };
00083 struct define_t trafo::cirdef =
00084   { "Tr", 4, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };