1 | /* modul PWM modulace |
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2 | ubytky a mrtve casy |
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3 | |
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4 | shodna verze s PWM_FULL_LC |
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5 | |
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6 | 31.5. 2007 |
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7 | |
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8 | VER. zmenena metoda vypoctu pily (nove funkce) |
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9 | 31.5.2007 Doplnena PWM se treti harmonickou - fce pwm_full_new_3h(...) - prepinani mezi sinusovou PWM a 3. harmonickou pomoci priznaku mod! |
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10 | */ |
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11 | |
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12 | #define _USE_MATH_DEFINES |
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13 | #include <math.h> |
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14 | #include <stdlib.h> |
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15 | #include "pwm.h" |
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16 | |
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17 | void pwm_full_init(double Ucn, double fc, double DT); |
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18 | void pwm_full(double *us, double *u, double *Iz,double Ucn, double Uc, double *i, double fc, double *va_char,unsigned int pocet, double h); |
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19 | |
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20 | void pwm_full_new_init(double h, double fc, double DT, int citac_init, int D_smer, int D_smer2); |
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21 | void pwm_full_new(double *us, double *u, double *Iz, double Ucn, double Uc, double *is, double *va_char, unsigned int pocet); |
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22 | |
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23 | // PWM se treti harmonickou |
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24 | void pwm_full_new_init_3h(double h, double fc, double DT, int citac_init, int D_smer, int D_smer2); |
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25 | void pwm_full_new_3h(double *us, double *u, double *Iz, double Ucn, double Uc, double *is, double *va_char, unsigned int pocet, unsigned int mod); |
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26 | |
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27 | static double ubytek(double *va_char, double I, unsigned int pocet); |
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28 | |
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29 | static double up, up2, dup; |
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30 | static int smer, smer2; |
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31 | |
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32 | static int citac, citac2, citac_PR; |
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33 | |
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34 | double ladeni_pila, ladeni_ur; |
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35 | |
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36 | void pwm_full_init(double Ucn, double fc, double DT) |
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37 | /* |
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38 | Ucn ... jmenovite napeti kondenzatoru v ss obvodu |
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39 | fc ... spinaci frekvence |
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40 | h ... krok simulace |
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41 | DT ... velikost mrtveho casu |
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42 | */ |
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43 | { |
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44 | smer=-1; smer2=1; |
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45 | up=Ucn/2; |
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46 | // up=0.; |
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47 | up2=up-2*Ucn*fc*DT; |
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48 | } |
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49 | |
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50 | void pwm_full(double *us, double *u, double *Iz,double Ucn, double Uc, double *is, double fc, double *va_char,unsigned int pocet, double h) |
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51 | /* |
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52 | u ... pozadovane napeti |
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53 | us ... [usx, usy]...vystupni napeti stridace v (x,y) |
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54 | Iz ... proud v ss obvodu |
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55 | Ucn ... jmenovite nap. v ss obvodu |
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56 | Uc ... skutecne napeti na C |
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57 | is ... [isx, isy]...proud motorem |
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58 | va_char ... VA-char vykonovych spinacu |
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59 | pocet ... pocet bodu VA-charky |
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60 | h ... krok simulace |
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61 | */ |
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62 | { |
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63 | unsigned int i; |
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64 | double iabc[3], ur[3],ustr[3],ua,ub,uc; |
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65 | double dtr[3],dd[3]; // ubytky na polovodicich |
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66 | |
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67 | ladeni_pila=up; |
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68 | |
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69 | iabc[0]=*is; |
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70 | iabc[1]=(-*is+sqrt(3.)**(is+1))/2.; |
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71 | iabc[2]=(-*is-sqrt(3.)**(is+1))/2.; |
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72 | |
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73 | ur[0]=*u; |
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74 | ur[1]=(-*u+sqrt(3.)**(u+1))/2.; |
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75 | ur[2]=(-*u-sqrt(3.)**(u+1))/2.; |
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76 | |
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77 | for (i=0;i<3;i++) |
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78 | { dtr[i]=ubytek(va_char,fabs(iabc[i]),pocet); |
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79 | dd[i]=dtr[i]*.73; |
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80 | } |
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81 | |
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82 | // implementace ubytku a mrtvych casu |
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83 | for (i=0;i<3;i++) |
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84 | if (iabc[i]>=0) |
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85 | if ((ur[i]>up) && (ur[i]>up2)) |
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86 | ustr[i]=Uc/2-dtr[i]; |
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87 | else |
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88 | ustr[i]=-(Uc/2+dd[i]); |
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89 | else |
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90 | if ((ur[i]<up) && (ur[i]<up2)) |
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91 | ustr[i]=-(Uc/2-dtr[i]); |
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92 | else |
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93 | ustr[i]=Uc/2+dd[i]; |
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94 | |
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95 | // fazova napeti zateze |
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96 | ua=(2*ustr[0]-ustr[1]-ustr[2])/3; |
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97 | ub=(2*ustr[1]-ustr[0]-ustr[2])/3; |
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98 | uc=(2*ustr[2]-ustr[0]-ustr[1])/3; |
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99 | |
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100 | // vystupni napeti stridace v (x,y) |
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101 | *us=(2.*ua-ub-uc)/3.; |
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102 | *(us+1)=(ub-uc)/sqrt(3.); |
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103 | |
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104 | // vypocet pily pro PWM a pily pro mrtve casy |
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105 | dup=2.*Ucn*fc*h; |
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106 | up+=smer*dup; |
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107 | if (up>Ucn/2) |
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108 | { up-=2*dup; |
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109 | smer=-1; |
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110 | } |
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111 | if (up<-Ucn/2) |
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112 | { up+=2.*dup; |
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113 | smer=1; |
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114 | } |
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115 | |
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116 | up2+=smer2*dup; |
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117 | if (up2>Ucn/2) |
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118 | { up2-=2.*dup; |
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119 | smer2=-1; |
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120 | } |
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121 | if (up2<-Ucn/2) |
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122 | { up2+=2.*dup; |
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123 | smer2=1; |
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124 | } |
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125 | |
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126 | *Iz=(ustr[0]>0)*iabc[0]+(ustr[1]>0)*iabc[1]+(ustr[2]>0)*iabc[2]; |
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127 | } |
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128 | |
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129 | static double ubytek(double *va_char, double I, unsigned int pocet) |
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130 | { |
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131 | unsigned int ii; |
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132 | double delta_u; |
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133 | |
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134 | ii=0; |
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135 | while ((*(va_char+ii)<I) && (ii<(pocet-1))) |
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136 | ii++; |
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137 | |
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138 | if (ii==(pocet-1)) // konec va_char - predpoklad nasyceni charky |
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139 | delta_u=*(va_char+ii+pocet); |
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140 | else |
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141 | if (ii==0) |
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142 | delta_u=0; |
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143 | else |
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144 | delta_u=*(va_char+ii-1+pocet)+(I-*(va_char+ii-1))/(*(va_char+ii)-*(va_char+ii-1))*(*(va_char+ii+pocet)-*(va_char+ii-1+pocet)); |
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145 | |
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146 | return delta_u; |
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147 | } |
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148 | |
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149 | |
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150 | void pwm_full_new(double *us, double *u, double *Iz, double Ucn, double Uc, double *is, double *va_char, unsigned int pocet) |
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151 | /* |
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152 | u ... pozadovane napeti |
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153 | us ... [usx, usy]...vystupni napeti stridace v (x,y) |
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154 | Iz ... proud v ss obvodu |
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155 | Ucn ... jmenovite nap. v ss obvodu |
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156 | Uc ... skutecne napeti na C |
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157 | is ... [isx, isy]...proud motorem |
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158 | va_char ... VA-char vykonovych spinacu |
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159 | pocet ... pocet bodu VA-charky |
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160 | t ... aktualni cas simulace |
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161 | */ |
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162 | { |
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163 | unsigned int i; |
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164 | double iabc[3], ur[3],ustr[3],ua,ub,uc; |
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165 | double dtr[3],dd[3]; // ubytky na polovodicich |
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166 | |
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167 | // vypocet pily |
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168 | up=(double)citac/citac_PR*Ucn/2.; |
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169 | up2=(double)citac2/citac_PR*Ucn/2.; |
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170 | |
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171 | ladeni_pila=up; |
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172 | |
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173 | iabc[0]=*is; |
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174 | iabc[1]=(-*is+sqrt(3.)**(is+1))/2.; |
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175 | iabc[2]=(-*is-sqrt(3.)**(is+1))/2.; |
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176 | |
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177 | ur[0]=*u; |
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178 | ur[1]=(-*u+sqrt(3.)**(u+1))/2.; |
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179 | ur[2]=(-*u-sqrt(3.)**(u+1))/2.; |
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180 | |
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181 | for (i=0;i<3;i++) |
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182 | { dtr[i]=ubytek(va_char,fabs(iabc[i]),pocet); |
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183 | dd[i]=dtr[i]*.73; |
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184 | } |
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185 | |
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186 | // implementace ubytku a mrtvych casu |
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187 | for (i=0;i<3;i++) |
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188 | if (iabc[i]>=0) |
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189 | if ((ur[i]>up) && (ur[i]>up2)) |
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190 | ustr[i]=Uc/2-dtr[i]; |
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191 | else |
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192 | ustr[i]=-(Uc/2+dd[i]); |
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193 | else |
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194 | if ((ur[i]<up) && (ur[i]<up2)) |
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195 | ustr[i]=-(Uc/2-dtr[i]); |
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196 | else |
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197 | ustr[i]=Uc/2+dd[i]; |
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198 | |
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199 | // fazova napeti zateze |
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200 | ua=(2*ustr[0]-ustr[1]-ustr[2])/3; |
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201 | ub=(2*ustr[1]-ustr[0]-ustr[2])/3; |
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202 | uc=(2*ustr[2]-ustr[0]-ustr[1])/3; |
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203 | |
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204 | // vystupni napeti stridace v (x,y) |
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205 | *us=(2.*ua-ub-uc)/3.; |
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206 | *(us+1)=(ub-uc)/sqrt(3.); |
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207 | |
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208 | *Iz=(ustr[0]>0)*iabc[0]+(ustr[1]>0)*iabc[1]+(ustr[2]>0)*iabc[2]; |
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209 | |
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210 | // posun pily ... inkrement citacu |
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211 | if ((citac==citac_PR)||(citac==-citac_PR)) smer*=-1; |
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212 | if ((citac2==citac_PR)||(citac2==-citac_PR)) smer2*=-1; |
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213 | citac+=smer; |
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214 | citac2+=smer2; |
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215 | } |
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216 | |
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217 | void pwm_full_new_init(double h, double fc, double DT, int citac_init, int D_smer, int D_smer2) |
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218 | /* |
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219 | fc ... spinaci frekvence |
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220 | h ... krok simulace |
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221 | DT ... velikost mrtveho casu |
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222 | citac_init ... pocatecni nastaveni citace |
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223 | D_smer, D_smer1 ... pocatecni nastaveni smeru citani |
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224 | */ |
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225 | { |
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226 | smer=D_smer; smer2=D_smer2; |
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227 | citac=citac_init; |
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228 | citac2=citac_init-(int)(DT/h); |
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229 | citac_PR=(int)(1./4./fc/h); |
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230 | } |
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231 | |
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232 | |
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233 | void pwm_full_new_init_3h(double h, double fc, double DT, int citac_init, int D_smer, int D_smer2) |
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234 | /* |
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235 | fc ... spinaci frekvence |
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236 | h ... krok simulace |
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237 | DT ... velikost mrtveho casu |
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238 | citac_init ... pocatecni nastaveni citace |
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239 | D_smer, D_smer1 ... pocatecni nastaveni smeru citani |
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240 | */ |
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241 | { |
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242 | smer=D_smer; smer2=D_smer2; |
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243 | citac=citac_init; |
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244 | citac2=abs(citac_init-(int)(DT/h)); |
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245 | citac_PR=(int)(1./2./fc/h); |
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246 | } |
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247 | |
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248 | |
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249 | void pwm_full_new_3h(double *us, double *u, double *Iz, double Ucn, double Uc, double *is, double *va_char, unsigned int pocet, unsigned int mod) |
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250 | /* |
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251 | u ... pozadovane napeti ve formatu u={Um, beta} |
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252 | us ... [usx, usy]...vystupni napeti stridace v (x,y) |
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253 | Iz ... proud v ss obvodu |
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254 | Ucn ... jmenovite nap. v ss obvodu |
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255 | Uc ... skutecne napeti na C |
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256 | is ... [isx, isy]...proud motorem |
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257 | va_char ... VA-char vykonovych spinacu |
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258 | pocet ... pocet bodu VA-charky |
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259 | t ... aktualni cas simulace |
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260 | mod ... mod= - sinusova PWM; mod=1 - PWM se 3. harmonickou |
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261 | */ |
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262 | { |
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263 | unsigned int i; |
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264 | double iabc[3], ur[3],ustr[3],ua,ub,uc; |
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265 | double dtr[3],dd[3]; // ubytky na polovodicich |
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266 | double Um, beta; |
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267 | double U3; // korekce 3. harmonickou |
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268 | |
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269 | |
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270 | Um=*u; |
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271 | beta=*(u+1); |
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272 | |
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273 | // vypocet pily |
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274 | // up=(double)citac/citac_PR*Ucn/2.; |
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275 | // up2=(double)citac2/citac_PR*Ucn/2.; |
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276 | // vypocet pily presne jako v procesoru |
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277 | up=((double)citac/citac_PR-0.5)*Ucn; |
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278 | up2=((double)citac2/citac_PR-0.5)*Ucn; |
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279 | |
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280 | ladeni_pila=up; |
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281 | |
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282 | iabc[0]=*is; |
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283 | iabc[1]=(-*is+sqrt(3.)**(is+1))/2.; |
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284 | iabc[2]=(-*is-sqrt(3.)**(is+1))/2.; |
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285 | |
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286 | if (mod==0) // sinusova PWM |
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287 | { |
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288 | ur[0]=Um*cos(beta); |
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289 | ur[1]=Um*cos(beta-2./3.*M_PI); |
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290 | ur[2]=Um*cos(beta+2./3.*M_PI); |
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291 | } |
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292 | else // PWM se 3. harmonickou |
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293 | { |
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294 | // dle Karla |
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295 | // U3=0.13*cos(3.*beta); |
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296 | // moje |
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297 | U3=0.17*cos(3.*beta); |
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298 | ur[0]=Um*(cos(beta)-U3); |
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299 | ur[1]=Um*(cos(beta-2./3.*M_PI)-U3); |
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300 | ur[2]=Um*(cos(beta+2./3.*M_PI)-U3); |
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301 | } |
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302 | |
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303 | ladeni_ur=ur[0]; |
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304 | |
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305 | for (i=0;i<3;i++) |
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306 | { dtr[i]=ubytek(va_char,fabs(iabc[i]),pocet); |
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307 | dd[i]=dtr[i]*.73; |
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308 | } |
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309 | |
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310 | // implementace ubytku a mrtvych casu |
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311 | for (i=0;i<3;i++) |
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312 | if (iabc[i]>=0) |
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313 | if ((ur[i]>up) && (ur[i]>up2)) |
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314 | ustr[i]=Uc/2-dtr[i]; |
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315 | else |
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316 | ustr[i]=-(Uc/2+dd[i]); |
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317 | else |
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318 | if ((ur[i]<up) && (ur[i]<up2)) |
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319 | ustr[i]=-(Uc/2-dtr[i]); |
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320 | else |
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321 | ustr[i]=Uc/2+dd[i]; |
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322 | |
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323 | // fazova napeti zateze |
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324 | ua=(2.*ustr[0]-ustr[1]-ustr[2])/3.; |
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325 | ub=(2.*ustr[1]-ustr[0]-ustr[2])/3.; |
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326 | uc=(2.*ustr[2]-ustr[0]-ustr[1])/3.; |
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327 | |
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328 | // vystupni napeti stridace v (x,y) |
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329 | *us=(2.*ua-ub-uc)/3.; |
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330 | *(us+1)=(ub-uc)/sqrt(3.); |
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331 | |
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332 | *Iz=(ustr[0]>0)*iabc[0]+(ustr[1]>0)*iabc[1]+(ustr[2]>0)*iabc[2]; |
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333 | |
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334 | // posun pily ... inkrement citacu |
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335 | // if ((citac==citac_PR)||(citac==-citac_PR)) smer*=-1; |
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336 | // if ((citac2==citac_PR)||(citac2==-citac_PR)) smer2*=-1; |
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337 | if ((citac==citac_PR)||(citac==0)) smer*=-1; |
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338 | if ((citac2==citac_PR)||(citac2==0)) smer2*=-1; |
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339 | citac+=smer; |
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340 | citac2+=smer2; |
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341 | } |
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