Hochschule München
/
PowerDriverforH2m
Mosfet Driver
main.cpp
- Committer:
- HMFK03LST1
- Date:
- 2013-05-07
- Revision:
- 4:8c89e422bed7
- Parent:
- 3:af6a6f498276
- Child:
- 5:d814001b8aae
File content as of revision 4:8c89e422bed7:
#include "mbed.h" LocalFileSystem local("local"); //init Flashdrive for reading config file FILE *fp; //Pointer to local Config File #define USR_POWERDOWN (0x104) //Power Down Mbed Interface (save 50% or 45 mA) float version = 0.8; //Program Version bool mosfet1_open = true ; //Mosfet1 geschlossen bool mosfet1_close = false; //Mosfet1 offen DigitalOut myled (LED1); DigitalOut myled1 (LED2); DigitalOut myled2 (LED3); DigitalOut myled3 (LED4); DigitalOut purge (p33); DigitalOut pump (p34); DigitalOut mosfet1(p35); DigitalOut mosfet2(p36); DigitalIn In1 (p30); DigitalIn In2 (p29); DigitalIn In3 (p28); DigitalIn In4 (p27); AnalogIn AI1 (p17); AnalogIn cur_in (p18); AnalogIn bz_in (p19); AnalogIn cap_in (p20); Serial pc(USBTX, USBRX); Ticker PC_OUT_timer; // Output Monitoring to Serial Ticker LED_timer; // Set Status LED´s Timer t; // Brennstoffzellen Parameter float bz_max = 30.5; //Brennstoffzelle Spannung Abs. max. float bz_p_oben = 15.0; //Brennstoffzelle Prozent Load bei bz_max float bz_on = 29.0; //Brennstoffzelle Spannung für Ladefreigabe) float bz_min = 26.0; //Brennstoffzelle Spannung min. Laden beenden float bz_p_unten = -20.0; //Brennstoffzelle Prozent Load bei bz_min float bz_current = 1.5; //Brennstoffzellen Strom nominal float bz_cur_add = 2.0; //Brennstoffzellen Strom max float bz_c_i_max = 20.0; //Strom Integrale Reglung Max % float bz_c_i_min = -10.0; //Strom Integrale Reglung Min % // SuperCap Parameter float cap_max = 25.0; //CAP Spannung max. (Abschaltung) float cap_p_max = 90.0; //CAP Prozent Load bei 0V float cap_min = 20.0; //CAP Spannung min. (Zelle an) float cap_p_min = 5.0; //CAP Prozent Load bei 0V float cap_delta = 1.5; //Absenkung der Spannung mit Din // Pump & Purge Parameter float purge_start = 3.0; //s before starting purch float purge_end = 3.2; //s after finishing purch float boost_time = 0.2; //s Pump runup with 100% Duty Cycle int pwm_cycle = 20; //ms für PWM Period int pwm_on = 12; //ms für PWM high // Monitoring Parameter int debug = 1; //Serial Output on (1) float sample = 5; //Serial Output Samples per Second // Temp Variable bool Load = false; //Laderegler aktiv bool pump_on = false; //Pumpenzustand int boost = 0; //Number of PWM-Cycles for Pump runup boost calc in load_cfg int Cel_Level = 0; //% Load aus Bz Spannung int Cap_Level = 0; //% Load aus Cap Spannung int Cur_Level = 0; int Load_Level = 0; //% Load aus Bz und Cap float bz = 0; //Spannung Brennstoffzelle float cap = 0; //Spannung SuperCap float current = 0; //Strom in den Mosfet unsigned int counter_cycle = 0; //Counter PWM-Cycles for Pump-Purge unsigned int counter_ms = 0; //Counter for PWM Pump void load_cfg() { char read[24][5]; char i = 0; char j = 0; int c = 0; float temp; for (j = 0; j<24; j++) { for (i = 0; i<8; i++) { read[j][i] = '\0'; } } i=0; j=0; fp = fopen("/local/power.cfg", "r"); if ( fp != NULL ) { while((c != EOF) && (c !=10)) { c = fgetc(fp); if (c == ';'){read[j][0] = i; i = 0; j++;} else {i++; read[j][i] = c;} } fclose(fp); sscanf(&read[ 0][1], "%f", &temp); bz_max = temp; sscanf(&read[ 1][1], "%f", &temp); bz_p_oben = temp; sscanf(&read[ 2][1], "%f", &temp); bz_on = temp; sscanf(&read[ 3][1], "%f", &temp); bz_min = temp; sscanf(&read[ 4][1], "%f", &temp); bz_p_unten = temp; sscanf(&read[ 5][1], "%f", &temp); bz_current = temp; sscanf(&read[ 6][1], "%f", &temp); bz_cur_add = temp; sscanf(&read[ 7][1], "%f", &temp); bz_c_i_max = temp; sscanf(&read[ 8][1], "%f", &temp); bz_c_i_min = temp; sscanf(&read[ 9][1], "%f", &temp); cap_max = temp; sscanf(&read[10][1], "%f", &temp); cap_p_max = temp; sscanf(&read[11][1], "%f", &temp); cap_min = temp; sscanf(&read[12][1], "%f", &temp); cap_p_min = temp; sscanf(&read[13][1], "%f", &temp); cap_delta = temp; sscanf(&read[14][1], "%f", &temp); purge_start = temp; sscanf(&read[15][1], "%f", &temp); purge_end = temp; sscanf(&read[16][1], "%f", &temp); boost_time = temp; sscanf(&read[17][1], "%f", &temp); pwm_cycle = temp; sscanf(&read[18][1], "%f", &temp); pwm_on = temp; sscanf(&read[19][1], "%f", &temp); debug = temp; sscanf(&read[20][1], "%f", &temp); sample = temp; boost = (boost_time * 1000) / pwm_cycle; } pc.printf("\n\r" ); pc.printf("******************************** \n\r" ); pc.printf("* Brennstoffzellenregler V%03.1f * \n\r",version); pc.printf("******************************** \n\r" ); pc.printf("--------------BZ---------------- \n\r" ); pc.printf(" BZ max [V] : %5.1f \n\r",bz_max ); pc.printf(" BZ max [%c] : %5.1f \n\r",37,bz_p_oben ); pc.printf(" BZ Laden on [V] : %5.1f \n\r",bz_on ); pc.printf(" BZ Laden off [V] : %5.1f \n\r",bz_min ); pc.printf(" BZ Laden off [%c] : %5.1f \n\r",37,bz_p_unten ); pc.printf(" BZ Strom norm [A] : %5.1f \n\r",bz_current ); pc.printf(" BZ Strom max. [A] : %5.1f \n\r",bz_cur_add ); pc.printf(" BZ Strom I max.[%c] : %5.1f \n\r",37,bz_c_i_max ); pc.printf(" BZ Strom I min.[%c] : %5.1f \n\r",37,bz_c_i_min ); pc.printf("-------------CAP---------------- \n\r" ); pc.printf(" CAP max [V] : %5.1f \n\r",cap_max ); pc.printf(" CAP max [%c] : %5.1f \n\r",37,cap_p_max ); pc.printf(" CAP min [V] : %5.1f \n\r",cap_min ); pc.printf(" CAP min [%c] : %5.1f \n\r",37,cap_p_min ); pc.printf(" CAP lo on Din [-V]: %5.1f \n\r",cap_delta ); pc.printf("----------Pump & Purge---------- \n\r" ); pc.printf(" Purge on [s] : %5.1f \n\r",purge_start ); pc.printf(" Purge off [s] : %5.1f \n\r",purge_end ); pc.printf(" Boost [s] : %5.1f \n\r",boost_time ); pc.printf(" PWM cycle [ms]: %5d \n\r" ,pwm_cycle ); pc.printf(" PWM on [ms]: %5d \n\r" ,pwm_on ); pc.printf("------------Monitor------------- \n\r" ); pc.printf(" Serial output [bool]: %5d \n\r" ,debug ); pc.printf(" Samplerate [Hz] : %5.0f \n\r",sample ); pc.printf("******************************** \n\r" ); pc.printf("\n\r" ); } int semihost_powerdown() { uint32_t arg; return __semihost(USR_POWERDOWN, &arg); } void SEND() { bool status= false; if (debug == 1) { if (mosfet1 == mosfet1_close) status = true; if (Load == true) mosfet1 = mosfet1_open; pc.printf("BZ: %4.1f/%4.1f-%4.1f+%4.1f CAP: %4.1f/%4.1f-%4.1f Purge: %4.1f/%4.1f-%4.1f Load: %03d Current: %4.2f \n\r" ,bz,bz_min,bz_on,bz_max,cap,cap_min,cap_max,float(counter_cycle)/(1000/pwm_cycle),purge_start,purge_end,Load_Level, current); if (status == true) mosfet1 = mosfet1_close; } } void LED() { if (bz < bz_min ) myled = 1; else myled = 0; //LED = Spannung an der BZ IO if (cap > cap_min) myled1 = 1; else myled1 = 0; //LED = Spannung an den Cap´s IO if ((mosfet1 == mosfet1_close) &&(Load == true)) myled2 = 1; else myled2 = 0; //LED = Gate Zustand Mosfet 1 if (pump_on == 1) myled3 = 1; else myled3 = 0; //LED = Pumpe an } void PUMPE() { counter_ms++; if ((bz > bz_max) && (cap > (cap_max - (In1 * cap_delta)))) { pump_on = false; } if ((cap <= cap_min) || (pump_on == true)) //Pumpe Einschaltbedingung { pump_on = true; if (counter_ms > (pwm_cycle - pwm_on)) pump = 1 ; //Set PWM from low to high if (counter_ms >= pwm_cycle) //End PWM cycle { counter_cycle++; counter_ms = 0; if (boost > 0) boost--; if ((counter_cycle < (1000 / pwm_cycle) * purge_start) || (boost <= 0) || (In1 == 0)) { pump = 0; //PWM Betrieb purge = 0; } else { if (pump == 1) purge = 1; //Purge Betrieb } if (counter_cycle > (1000 / pwm_cycle) * purge_end) //Purge Ende { counter_cycle = 0; purge = 0; pump = 0; } } } else { pump_on = 0; pump = 0; purge = 0; //Pumpe aus boost = (boost_time * 1000) / pwm_cycle; // Boost für nächsten Start setzen } } int main() { pc.baud(115200); //config Serial Port load_cfg(); //init config File semihost_powerdown(); //Mbed Interface powerdown PC_OUT_timer.attach(&SEND , (1/sample)); //Serial output Timer LED_timer.attach (&LED , 0.200 ); //LED Status Timer t.start(); //Timer für PWM starten float bz_faktor; //Temp Variable bz_faktor = ((bz_p_oben - bz_p_unten)/(bz_max - bz_min)); //Prozent Umrechnung BZ while(1) { bz = ((bz_in * 92.0) + bz )/3; //BZ RAW in Spannung umrechnen (2*neu zu 1*alt Glättung) cap = ((cap_in * 92.0) + cap)/3; //CAP RAW in Spannung umrechnen (2*neu zu 1*alt Glättung) current = (cur_in * 23.75) - 4.12; t.reset(); // Timer für 1 kHz starten PUMPE(); //Pumpen PWM aufrufen //***Regulate Cell Level*** Cel_Level = (bz_faktor * (bz - bz_min) + bz_p_unten) * 10; //%Load aus Zellenspannung berechnen //***Regulate Cap´s Level*** Cap_Level = (((cap / cap_max) * (cap_p_max - cap_p_min)) + cap_p_min) * 10; //%Load aus Cap Level //***Regulate Current Level*** if ((current-(bz_current + (In2 * bz_cur_add))) > 0) {if (Cur_Level > (bz_c_i_min*10)) Cur_Level--;} //to much Load else {if (Cur_Level < (bz_c_i_max*10)) Cur_Level++;} //less Load //*** Sum all Regulators Load_Level = Cur_Level; Load_Level = Load_Level + Cap_Level; Load_Level = Load_Level + Cel_Level; if (Load == true) // Laden aktiv { if (bz > bz_min || bz > bz_max) // Zelle über min. Spannung oder über max Spannung zum Entladen { while (t.read_us() <= 920) // während der PWM (1khz Periode) { if (t.read_us() < Load_Level) // %Load PWM zu Timer vergleich {mosfet1 = mosfet1_close;} // %Load PWM nicht erreicht Mosfet an else {mosfet1 = mosfet1_open;} // %Load PWM erreicht Mosfet aus } } else { mosfet1 = mosfet1_open ; // Mosfet wegen Unterspannung BZ auskoppeln Load = false; // Laden beenden bis BZ > BZ on (Sicherungsschaltung) } } else { if (bz >= cap){mosfet1 = mosfet1_open ;} // Mosfet im nicht Ladebetrieb auskoppeln else {mosfet1 = mosfet1_close;} // Mosfet im nicht Ladebetrieb einkoppeln (Treiber stromfrei = Stromsparen) while (t.read_us() <= 920){}; } if (( cap < cap_min) && (bz > bz_on)) Load = true; // Cap unter Minimum oder BZ über Maximum = Laden beginnen if ( cap >= cap_max ) Load = false; // if ( bz > bz_max ) Load = true; // Überladung abführen } }