Qucs-core
0.0.19
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00001 /* 00002 * inductor.cpp - inductor class implementation 00003 * 00004 * Copyright (C) 2003, 2004, 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 "inductor.h" 00031 00032 using namespace qucs; 00033 00034 inductor::inductor () : circuit (2) { 00035 type = CIR_INDUCTOR; 00036 setISource (true); 00037 } 00038 00039 void inductor::calcSP (nr_double_t frequency) { 00040 nr_double_t l = getPropertyDouble ("L") / z0; 00041 nr_complex_t z = nr_complex_t (0, 2.0 * pi * frequency * l); 00042 setS (NODE_1, NODE_1, z / (z + 2.0)); 00043 setS (NODE_2, NODE_2, z / (z + 2.0)); 00044 setS (NODE_1, NODE_2, 2.0 / (z + 2.0)); 00045 setS (NODE_2, NODE_1, 2.0 / (z + 2.0)); 00046 } 00047 00048 void inductor::initDC (void) { 00049 setVoltageSources (1); 00050 allocMatrixMNA (); 00051 voltageSource (VSRC_1, NODE_1, NODE_2); 00052 } 00053 00054 void inductor::calcDC (void) { 00055 clearY (); 00056 } 00057 00058 void inductor::initAC (void) { 00059 nr_double_t l = getPropertyDouble ("L"); 00060 00061 // for non-zero inductance usual MNA entries 00062 if (l != 0.0) { 00063 setVoltageSources (0); 00064 allocMatrixMNA (); 00065 } 00066 // for zero inductance create a zero voltage source 00067 else { 00068 initDC (); 00069 calcDC (); 00070 } 00071 } 00072 00073 void inductor::calcAC (nr_double_t frequency) { 00074 nr_double_t l = getPropertyDouble ("L"); 00075 00076 // for non-zero inductance usual MNA entries 00077 if (l != 0.0) { 00078 nr_complex_t y = nr_complex_t (0, -1 / (2.0 * pi * frequency * l)); 00079 setY (NODE_1, NODE_1, +y); setY (NODE_2, NODE_2, +y); 00080 setY (NODE_1, NODE_2, -y); setY (NODE_2, NODE_1, -y); 00081 } 00082 } 00083 00084 void inductor::initTR (void) { 00085 initDC (); 00086 clearY (); 00087 setStates (2); 00088 } 00089 00090 #define fState 0 // flux state 00091 #define vState 1 // voltage state 00092 00093 void inductor::calcTR (nr_double_t) { 00094 nr_double_t l = getPropertyDouble ("L"); 00095 nr_double_t r, v; 00096 nr_double_t i = real (getJ (VSRC_1)); 00097 00098 /* apply initial condition if requested */ 00099 if (getMode () == MODE_INIT && isPropertyGiven ("I")) { 00100 i = getPropertyDouble ("I"); 00101 } 00102 00103 setState (fState, i * l); 00104 integrate (fState, l, r, v); 00105 setD (VSRC_1, VSRC_1, -r); 00106 setE (VSRC_1, v); 00107 } 00108 00109 void inductor::initHB (void) { 00110 setVoltageSources (1); 00111 setInternalVoltageSource (1); 00112 allocMatrixMNA (); 00113 voltageSource (VSRC_1, NODE_1, NODE_2); 00114 } 00115 00116 void inductor::calcHB (nr_double_t frequency) { 00117 nr_double_t l = getPropertyDouble ("L"); 00118 setD (VSRC_1, VSRC_1, -l * 2 * pi * frequency); 00119 } 00120 00121 // properties 00122 PROP_REQ [] = { 00123 { "L", PROP_REAL, { 1e-9, PROP_NO_STR }, PROP_NO_RANGE }, PROP_NO_PROP }; 00124 PROP_OPT [] = { 00125 { "I", PROP_REAL, { 0, PROP_NO_STR }, PROP_NO_RANGE }, PROP_NO_PROP }; 00126 struct define_t inductor::cirdef = 00127 { "L", 2, PROP_COMPONENT, PROP_NO_SUBSTRATE, PROP_LINEAR, PROP_DEF };