ในกรณีใช้กับ โวลต์สูงเกิน 100 โวลต์ ต้องทำให้ ขา Gate เป็นไฟลบ 5.1-15 โวลต์ ขณะ OFF ขณะ ON ต้องทำให้ ขาGate เป็นไฟบวก 15-20 โวลต์ เมื่อเทียบ กับขา SOURCEครับ..
http://th.wikipedia.org/wiki/%E0%B8%A...
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// DDS Sine Generator 3 phase motor x5 mit ATMEGA 2560 PWM 4KHZ
#include "arduino.h" //Store data in flash (program) memory instead of SRAM
#include "avr/pgmspace.h"
#include "avr/io.h"
const byte sine256[] PROGMEM = {
127,130,133,136,139,143,146,149,152,155,158,161,164,167,170,173,176,178,181,184,187,190,192,195,198,200,203,205,208,210,212,215,217,219,221,223,225,227,229,231,233,234,236,238,239,240,
242,243,244,245,247,248,249,249,250,251,252,252,253,253,253,254,254,254,254,254,254,254,253,253,253,252,252,251,250,249,249,248,247,245,244,243,242,240,239,238,236,234,233,231,229,227,225,223,
221,219,217,215,212,210,208,205,203,200,198,195,192,190,187,184,181,178,176,173,170,167,164,161,158,155,152,149,146,143,139,136,133,130,127,124,121,118,115,111,108,105,102,99,96,93,90,87,84,81,78,
76,73,70,67,64,62,59,56,54,51,49,46,44,42,39,37,35,33,31,29,27,25,23,21,20,18,16,15,14,12,11,10,9,7,6,5,5,4,3,2,2,1,1,1,0,0,0,0,0,0,0,1,1,1,2,2,3,4,5,5,6,7,9,10,11,12,14,15,16,18,20,21,23,25,27,29,31,
33,35,37,39,42,44,46,49,51,54,56,59,62,64,67,70,73,76,78,81,84,87,90,93,96,99,102,105,108,111,115,118,121,124
};
#define cbi(sfr, bit) (_SFR_BYTE(sfr) &= ~_BV(bit)) //define a bit to have the properties of a clear bit operator
#define sbi(sfr, bit) (_SFR_BYTE(sfr) |= _BV(bit))//define a bit to have the properties of a set bit operator
int PWM1= 2;// PWM1 output, phase 1
int PWM2 = 3; //[WM2 ouput, phase 2
int PWM3 = 4; //PWM3 output, phase 3
int PWM4= 5;// PWM1 output, phase 1
int PWM5 = 6; //[WM2 ouput, phase 2
int PWM6 = 7; //PWM3 output, phase 3
int PWM7 = 8;// PWM1 output, phase 1
int PWM8 = 9; //[WM2 ouput, phase 2
int PWM9 = 10; //PWM3 output, phase 3
int PWM10 = 11;// PWM1 output, phase 1
int PWM11 = 12; //[WM2 ouput, phase 2
int PWM12 = 13; //PWM3 output, phase 3
int PWM13 = 44;// PWM1 output, phase 1
int PWM14 = 45; //[WM2 ouput, phase 2
int PWM15 = 46; //PWM3 output, phase 3
int offset_1 = 85; //offset 1 is 120 degrees out of phase with previous phase, Refer to PWM to sine.xls
int offset_2 = 170; //offset 2 is 120 degrees out of phase with offset 1. Refer to PWM to sine.xls
int program_exec_time = 52; //monitor how quickly the interrupt trigger
int ISR_exec_time = 53; //monitor how long the interrupt takes
double dfreq;
const double refclk=31376.6; // measured output frequency
// variables used inside interrupt service declared as voilatile
volatile byte current_count; // Keep track of where the current count is in sine 256 array
volatile byte ms4_delay; //variable used to generate a 4ms delay
volatile byte c4ms; // after every 4ms this variable is incremented, its used to create a delay of 1 second
volatile unsigned long phase_accumulator; // pahse accumulator
volatile unsigned long tword_m; // dds tuning word m, refer to DDS_calculator (from Martin Nawrath) for explination.
void setup()
{
pinMode(PWM1, OUTPUT); //sets the digital pin as output
pinMode(PWM2, OUTPUT); //sets the digital pin as output
pinMode(PWM3, OUTPUT);
pinMode(PWM4, OUTPUT); //sets the digital pin as output
pinMode(PWM5, OUTPUT); //sets the digital pin as output
pinMode(PWM6, OUTPUT); //sets the digital pin as output
pinMode(PWM7, OUTPUT); //sets the digital pin as output
pinMode(PWM8, OUTPUT); //sets the digital pin as output
pinMode(PWM9, OUTPUT);
pinMode(PWM10, OUTPUT); //sets the digital pin as output
pinMode(PWM11, OUTPUT); //sets the digital pin as output
pinMode(PWM12, OUTPUT);
pinMode(PWM13, OUTPUT); //sets the digital pin as output
pinMode(PWM14, OUTPUT); //sets the digital pin as output
pinMode(PWM15, OUTPUT);
pinMode(50, OUTPUT); //sets the digital pin as output
pinMode(52, OUTPUT); //sets the digital pin as output
pinMode(53, OUTPUT);
sbi(PORTB,program_exec_time); //Sets the pin
Setup_timer0();
Setup_timer1();
Setup_timer2();
Setup_timer3();
Setup_timer4();
Setup_timer5();
//Disable Timer 1 interrupt to avoid any timing delays
cbi (TIMSK0,TOIE0); //disable Timer0 !!! delay() is now not available
sbi (TIMSK2,TOIE2); //enable Timer2 Interrupt
tword_m=pow(2,32)*dfreq/refclk; //calulate DDS new tuning word
}
void loop()
{
while(1)
{
sbi(PORTB,program_exec_time); //Sets the pin
if (c4ms > 0) // c4ms = 4ms, thus 4ms *250 = 1 second delay
{
c4ms=0; //Reset c4ms
//dfreq=map(analogRead(0),0,1230,0,1000);
dfreq=map(analogRead(0),0,1023,0,1000); //Read voltage on analog 1 to see desired output frequency, 0V = 0Hz, 5V = 1.023kHz
cbi (TIMSK2,TOIE2); //Disable Timer2 Interrupt
tword_m=pow(2,32)*dfreq/refclk; //Calulate DDS new tuning word
sbi (TIMSK2,TOIE2); //Enable Timer2 Interrupt
}
}
}
void Setup_timer0(void)
{
TCCR0B = (TCCR0B & 0b11111000) | 0x02;
// Timer1 PWM Mode set to Phase Correct PWM
cbi (TCCR0A, COM0A0);
sbi (TCCR0A, COM0A1);
cbi (TCCR0A, COM0B0);
sbi (TCCR0A, COM0B1);
// Mode 1 / Phase Correct PWM
sbi (TCCR0A, WGM00);
cbi (TCCR0A, WGM01);
}
void Setup_timer1(void)
{
TCCR1B = (TCCR1B & 0b11111000) |0x02;
// Timer1 Clock Prescaler to : 1
cbi (TCCR1A, COM1A0);
sbi (TCCR1A, COM1A1);
cbi (TCCR1A, COM1B0);
sbi (TCCR1A, COM1B1);
sbi (TCCR1A, WGM10);
cbi (TCCR1A, WGM11);
cbi (TCCR1B, WGM12);
cbi (TCCR1B, WGM13);
}
void Setup_timer2()
{
TCCR2B = (TCCR2B & 0b11111000) | 0x02;// Timer2 Clock Prescaler to : 1
cbi (TCCR2A, COM2A0); // clear Compare Match
sbi (TCCR2A, COM2A1);
cbi (TCCR2A, COM2B0);
sbi (TCCR2A, COM2B1);
// Mode 1 / Phase Correct PWM
sbi (TCCR2A, WGM20);
cbi (TCCR2A, WGM21);
cbi (TCCR2B, WGM22);
}
void Setup_timer3(void)
{
TCCR3B = (TCCR3B & 0b11111000) |0x02;// Timer1 Clock Prescaler to : 1
cbi (TCCR3A, COM3A0);
sbi (TCCR3A, COM3A1);
cbi (TCCR3A, COM3B0);
sbi (TCCR3A, COM3B1);
cbi (TCCR3A, COM3C0);
sbi (TCCR3A, COM3C1);
// Mode 1 / Phase Correct PWM
sbi (TCCR3A, WGM30);
cbi (TCCR3A, WGM31);
cbi (TCCR3B, WGM32);
cbi (TCCR3B, WGM33);
cbi (TCCR3C, WGM33);
cbi (TCCR3C, WGM33);
}
void Setup_timer4()
{
TCCR4B = (TCCR4B & 0b11111000) | 0x02;// Timer2 Clock Prescaler to : 1
cbi (TCCR4A, COM4A0); // clear Compare Match
sbi (TCCR4A, COM4A1);
cbi (TCCR4A, COM4B0);
sbi (TCCR4A, COM4B1);
cbi (TCCR4A, COM4C0);
sbi (TCCR4A, COM4C1);
sbi (TCCR4A, WGM40);
cbi (TCCR4A, WGM41);
cbi (TCCR4B, WGM42);
cbi (TCCR4C, WGM43);
cbi (TCCR4C, WGM43);
}
void Setup_timer5(void)
{
TCCR5B = (TCCR5B & 0b11111000) |0x02;// Timer1 Clock Prescaler to : 1
cbi (TCCR5A, COM5A0);
sbi (TCCR5A, COM5A1);
cbi (TCCR5A, COM5B0);
sbi (TCCR5A, COM5B1);
cbi (TCCR5A, COM5C0);
sbi (TCCR5A, COM5C1);
sbi (TCCR5A, WGM50);
cbi (TCCR5A, WGM51);
cbi (TCCR5B, WGM52);
cbi (TCCR5B, WGM53);
cbi (TCCR5C, WGM50);
}
ISR(TIMER2_OVF_vect)
{
cbi(PORTD,program_exec_time); //Clear the pin
sbi(PORTD,ISR_exec_time); // Sets the pin
phase_accumulator=phase_accumulator+tword_m; //Adds tuning M word to previoud phase accumulator. refer to DDS_calculator (from Martin Nawrath) for explination.
current_count=phase_accumulator >> 24; // use upper 8 bits of phase_accumulator as frequency information
//motor 1
OCR3B = pgm_read_byte_near(sine256 + current_count); // read value fron ROM sine table and send to PWM
OCR3C = pgm_read_byte_near(sine256 + (uint8_t)(current_count + offset_1)); // read value fron ROM sine table and send to PWM, 120 Degree out of phase of PWM1
OCR0B = pgm_read_byte_near(sine256 + (uint8_t)(current_count + offset_2));// read value fron ROM sine table and send to PWM, 120 Degree out of phase of PWM2
//motor 2
OCR3A = OCR3B;
OCR4A = OCR3C;
OCR4B = OCR0B;
//motor 3
OCR4C = OCR3B;
OCR2B = OCR3C;
OCR2A = OCR0B;
//motor 4
OCR1A = OCR3B;
OCR1B = OCR3C;
OCR0A = OCR0B;
//motor 5
OCR5A = OCR3B;
OCR5B = OCR3C;
OCR5C = OCR0B;
//increment variable ms4_delay every 4mS/125 = milliseconds 32uS
if(ms4_delay++ == 125)
{
c4ms++;
ms4_delay=0; //reset count
}
cbi(PORTD,ISR_exec_time); //Clear the pin
}
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