Need help for my project

[Ehab Abdalla]

I'm using PIC18F4431 to generate 6 PWM inorder to control the speed of a three phase induction motor.
I'm also using IR2112 for gate driving of MOSFET (IRFP460).
The problem is that the motor dosen't rotate at all and I can't figure out why
Here's the MikroC Prog. and the schematic
Hope anyone can help...

#define up porte.f0
#define down porte.f1
#define rev porte.f2
#define startstop portd.f0
#define onoff portd.f2
#define Lo(param) ((char *)&param)[0]
#define Hi(param) ((char *)&param)[1]
unsigned char mask(unsigned char num);
unsigned int sintable[64]={437 , 474 , 510, 545, 579 , 611, 641 , 669 , 694, 716, 735, 751 , 764 , 773 , 778,780 , 778 , 773 , 764, 751 , 735 , 716 , 694 , 669, 641 , 611 , 579 , 545 , 510, 474, 437 ,400, 363 ,326 , 290, 255 , 221 , 189, 159 , 131, 106 , 84 , 65 , 49 , 36, 27, 22 , 20 , 22 ,27, 36 , 49 , 65, 84 , 106, 131 , 159 , 189 , 221 , 255 ,290 , 326 , 363 , 400 };
unsigned int sintable_new[64];
unsigned int dutycycle;
unsigned int xx=0,yy=0,zz=0,setfreq=0;
unsigned char x=1,freq,i,frequency,digit,digit10, digit1;
float nn,mi, mm=15.384615e-4;

void interrupt()
{
if (ptif_bit==1)
{
yy=xx+setfreq;
zz=yy>>10;
xx=yy;

PDC0L=Lo(sintable_new[zz]);
PDC0H=Hi(sintable_new[zz]);

if(rev==0)
{
if (zz>20)
{
PDC1L=Lo(sintable_new[zz-21]);
PDC1H=Hi(sintable_new[zz-21]);
}
else
{
PDC1L=Lo(sintable_new[zz+43]);
PDC1H=Hi(sintable_new[zz+43]);
}

if (zz>42)
{
PDC2L=Lo(sintable_new[zz-43]);
PDC2H=Hi(sintable_new[zz-43]);
}
else
{
PDC2L=Lo(sintable_new[zz+21]);
PDC2H=Hi(sintable_new[zz+21]);
}
}

if(rev==1)
{
if (zz>20)
{
PDC2L=Lo(sintable_new[zz-21]);
PDC2H=Hi(sintable_new[zz-21]);
}
else
{
PDC2L=Lo(sintable_new[zz+43]);
PDC2H=Hi(sintable_new[zz+43]);
}

if (zz>42)
{
PDC1L=Lo(sintable_new[zz-43]);
PDC1H=Hi(sintable_new[zz-43]);
}
else
{
PDC1L=Lo(sintable_new[zz+21]);
PDC1H=Hi(sintable_new[zz+21]);
}
}
ptif_bit=0;
}
}

void main()
{
PWMCON0=0 ;
PWMCON1=1; //PWM timer sync configuration
freq=50;
setfreq=13*freq;
GIE_BIT=1;
PEIE_BIT=1;
PTIE_BIT=1;
trisc=0;
trisb=0;
trisa=0;
TRISD.F0=1;
TRISD.F1=0;
PORTD.F1=0;
TRISD.F2=1;
trise=0b00001111;
PORTB=0;
porta=0;
ANSEL0=0;
ANSEL1=0;
frequency= setfreq/13;
digit = frequency % 10;
digit1 = mask(digit); // Prepare mask for displaying ones
digit = frequency/10;
digit10 = mask(digit); // Prepare mask for displaying tens
PORTA=digit10;
RB6_BIT=digit10.f6;
portc.f0=digit1.f0;
portc.f1=digit1.f1;
portc.f2=digit1.f2;
portc.f3=digit1.f3;
portc.f4=digit1.f4;
portc.f5=digit1.f5;
portc.f6=digit1.f6;

if(setfreq<650)
{
i=0;
mi=mm*setfreq;
nn=400-400*mi;
for(i=0;i<64;i++)
{
sintable_new=mi*sintable+nn ;
}
i=0;
}
else
{
for (i=0;i<64;i++)
{
sintable_new=sintable;

}
i=0;
}
PTPERL=199; //16 MHZ OSCILLATOR PTPER=16 MHZ/(4*FPWM*TMRPS) -1, FPWM=5 KHZ
PTPERH=0;
PTCON0=0b00000100;
PTIP_BIT=1;
DTCON=0b11000011;
dutycycle=400;
PDC0L=Lo(dutycycle);
PDC0H=Hi(dutycycle);


PTCON1=0b10000000;


while(1)
{

if (startstop==1)
{
PWMCON0=0; //onll pwm0 ,pwm1,2,3,4,5 disabled
x=1;
}

if (startstop==0)
{
if(x==1)
{
PWMCON0=0b01000000;
x=0;
}
}

if (onoff==0)
{
portd.f1=1; //supply relay energized
}
else
{
portd.f1=0; //supply relay off
}



if (up==0)
{
if (setfreq < 1300)
{
setfreq=setfreq+13;
frequency= setfreq/13;
digit = frequency % 10;
digit1 = mask(digit); // Prepare mask for displaying ones
digit = frequency/10;
digit10 = mask(digit); // Prepare mask for displaying tens
PORTA=digit10;
RB6_BIT=digit10.f6;
portc.f0=digit1.f0;
portc.f1=digit1.f1;
portc.f2=digit1.f2;
portc.f3=digit1.f3;
portc.f4=digit1.f4;
portc.f5=digit1.f5;
portc.f6=digit1.f6;
delay_ms(300);
if(setfreq<650)
{
i=0;
mi=mm*setfreq;
nn=400-400*mi;
for(i=0;i<64;i++)
{
sintable_new=mi*sintable+nn ;
delay_us(50);
}
i=0;
}

else
{
for (i=0;i<64;i++)
{
sintable_new=sintable;
delay_us(50);

}
i=0;
}
}
}

if (down==0)
{
if (setfreq > 26)
{
setfreq=setfreq-13;
frequency= setfreq/13;
digit = frequency % 10;
digit1 = mask(digit); // Prepare mask for displaying ones
digit = frequency/10;
digit10 = mask(digit); // Prepare mask for displaying tens
PORTA=digit10;
RB6_BIT=digit10.f6;
portc.f0=digit1.f0;
portc.f1=digit1.f1;
portc.f2=digit1.f2;
portc.f3=digit1.f3;
portc.f4=digit1.f4;
portc.f5=digit1.f5;
portc.f6=digit1.f6;
delay_ms(300);
if(setfreq<650)
{
i=0;
mi=mm*setfreq;
nn=400-400*mi;
for(i=0;i<64;i++)
{
sintable_new=mi*sintable+nn ;
delay_us(50);
}
i=0;
}

else
{
for (i=0;i<64;i++)
{
sintable_new=sintable;
delay_us(50);

}
i=0;
}
}
}
}
}

unsigned char mask(unsigned char num) {
switch (num) {
case 0 : return 0xC0;
case 1 : return 0xF9;
case 2 : return 0xA4;
case 3 : return 0xB0;
case 4 : return 0x99; //
case 5 : return 0x92;
case 6 : return 0x82;
case 7 : return 0xF8;
case 8 : return 0x80;
case 9 : return 0x90;
}
}


View attachment edaboard.jpg

 

[Golden Electronics]

Motor not rotate means no excitation voltage generate. Please confirm PWM output at pin then driver IC input then driver IC output then ur MOSFET Bridge output. IF these all work then Check output voltage without very small load current then Increase current. All this for Restive load. If it work then Check initial required current for motor on Mains. If such Current is produce by mosfet then only motor start rotate.