Qucs-core  0.0.19
mutual.cpp
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00001 /*
00002  * mutual.cpp - two mutual inductors class implementation
00003  *
00004  * Copyright (C) 2005, 2006, 2008 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 "mutual.h"
00031 
00032 using namespace qucs;
00033 
00034 mutual::mutual () : circuit (4) {
00035   type = CIR_MUTUAL;
00036 }
00037 
00038 void mutual::calcSP (nr_double_t frequency) {
00039 #if 0
00040   setMatrixS (ytos (calcMatrixY (frequency)));
00041 #else
00042   nr_double_t l1 = getPropertyDouble ("L1");
00043   nr_double_t l2 = getPropertyDouble ("L2");
00044   nr_double_t k = getPropertyDouble ("k");
00045   nr_double_t o = 2 * pi * frequency;
00046   nr_double_t a = k * k - 1;
00047   nr_complex_t d = nr_complex_t (o * o * l1 * l2 * a / 2 / z0 + 2 * z0, o * (l1 + l2));
00048   nr_complex_t r;
00049   r = nr_complex_t (2 * z0, o * l2) / d;
00050   setS (NODE_1, NODE_4, r); setS (NODE_4, NODE_1, r);
00051   r = 1.0 - r;
00052   setS (NODE_1, NODE_1, r); setS (NODE_4, NODE_4, r);
00053   r = nr_complex_t (2 * z0, o * l1) / d;
00054   setS (NODE_2, NODE_3, r); setS (NODE_3, NODE_2, r);
00055   r = 1.0 - r;
00056   setS (NODE_2, NODE_2, r); setS (NODE_3, NODE_3, r);
00057   r = nr_complex_t (0, o * k * std::sqrt (l1 * l2)) / d;
00058   setS (NODE_1, NODE_2, r); setS (NODE_2, NODE_1, r);
00059   setS (NODE_3, NODE_4, r); setS (NODE_4, NODE_3, r);
00060   r = -r;
00061   setS (NODE_1, NODE_3, r); setS (NODE_3, NODE_1, r);
00062   setS (NODE_2, NODE_4, r); setS (NODE_4, NODE_2, r);
00063 #endif
00064 }
00065 
00066 matrix mutual::calcMatrixY (nr_double_t frequency) {
00067   nr_double_t l1 = getPropertyDouble ("L1");
00068   nr_double_t l2 = getPropertyDouble ("L2");
00069   nr_double_t k = getPropertyDouble ("k");
00070   nr_double_t o = 2 * pi * frequency;
00071   nr_double_t a = 1 - k * k;
00072   nr_complex_t z1 = nr_complex_t (0, o * l1 * a);
00073   nr_complex_t z2 = nr_complex_t (0, o * l2 * a);
00074   nr_complex_t y3 = nr_complex_t (0, k / (o * std::sqrt (l1 * l2) * a));
00075 
00076   matrix y = matrix (4);
00077   y.set (NODE_1, NODE_1, +1.0 / z1); y.set (NODE_4, NODE_4, +1.0 / z1);
00078   y.set (NODE_1, NODE_4, -1.0 / z1); y.set (NODE_4, NODE_1, -1.0 / z1);
00079   y.set (NODE_2, NODE_2, +1.0 / z2); y.set (NODE_3, NODE_3, +1.0 / z2);
00080   y.set (NODE_2, NODE_3, -1.0 / z2); y.set (NODE_3, NODE_2, -1.0 / z2);
00081   y.set (NODE_1, NODE_3, -y3); y.set (NODE_3, NODE_1, -y3);
00082   y.set (NODE_2, NODE_4, -y3); y.set (NODE_4, NODE_2, -y3);
00083   y.set (NODE_1, NODE_2, +y3); y.set (NODE_2, NODE_1, +y3);
00084   y.set (NODE_3, NODE_4, +y3); y.set (NODE_4, NODE_3, +y3);
00085   return y;
00086 }
00087 
00088 void mutual::initAC (void) {
00089   setVoltageSources (0);
00090   allocMatrixMNA ();
00091 }
00092 
00093 void mutual::calcAC (nr_double_t frequency) {
00094   setMatrixY (calcMatrixY (frequency));
00095 }
00096 
00097 void mutual::initDC (void) {
00098   setVoltageSources (2);
00099   allocMatrixMNA ();
00100   voltageSource (VSRC_1, NODE_1, NODE_4);
00101   voltageSource (VSRC_2, NODE_2, NODE_3);
00102 }
00103 
00104 void mutual::initTR (void) {
00105   initDC ();
00106   setStates (8);
00107 }
00108 
00109 #define fState11 0 // flux state
00110 #define vState11 1 // voltage state
00111 #define fState22 2
00112 #define vState22 3
00113 #define fState12 4
00114 #define vState12 5
00115 #define fState21 6
00116 #define vState21 7
00117 
00118 void mutual::calcTR (nr_double_t) {
00119   nr_double_t k  = getPropertyDouble ("k");
00120   nr_double_t l1 = getPropertyDouble ("L1");
00121   nr_double_t l2 = getPropertyDouble ("L2");
00122   nr_double_t i1 = real (getJ (VSRC_1));
00123   nr_double_t i2 = real (getJ (VSRC_2));
00124   nr_double_t r11, r12, r21, r22, v11, v22, v12, v21;
00125   nr_double_t M12 = k * std::sqrt (l1 * l2);
00126 
00127   // self inductances
00128   setState  (fState11, i1 * l1);
00129   integrate (fState11, l1, r11, v11);
00130   setState  (fState22, i2 * l2);
00131   integrate (fState22, l2, r22, v22);
00132 
00133   // mutual inductances
00134   setState  (fState12, i2 * M12);
00135   integrate (fState12, M12, r12, v12);
00136   setState  (fState21, i1 * M12);
00137   integrate (fState21, M12, r21, v21);
00138 
00139   setD (VSRC_1, VSRC_1, -r11); setD (VSRC_1, VSRC_2, -r12);
00140   setD (VSRC_2, VSRC_2, -r22); setD (VSRC_2, VSRC_1, -r21);
00141   setE (VSRC_1, v11 + v12);
00142   setE (VSRC_2, v22 + v21);
00143 }
00144 
00145 // properties
00146 PROP_REQ [] = {
00147   { "L1", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_POS_RANGEX },
00148   { "L2", PROP_REAL, { 1e-3, PROP_NO_STR }, PROP_POS_RANGEX },
00149   { "k", PROP_REAL, { 0.9, PROP_NO_STR }, PROP_RNGXX (-1, 1) },
00150   PROP_NO_PROP };
00151 PROP_OPT [] = {
00152   PROP_NO_PROP };
00153 struct define_t mutual::cirdef =
00154   { "MUT", 4, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };