Help ! Controlling 3-Phase AC Induction Motors Using the PIC18F4431

[gaikieuuc]

I start learn 3 Phase AC Induction Motors Using the PIC18F4431. Pz help me pointing the wa. how to create a phase difference of 120 degrees and calculate the value of sine table, timer interrupts and frequency. I do not need to change in frequency.thank all .

[ScaleRobotics]

Here's some 3 phase for the PIC18F2431 chip. http://www.picbasic.co.uk/forum/cont...-DT-interrupts

[gaikieuuc]

Thankiu very much ! i will read it .
I intend follow this guide but does not change frequency and PWM Fault detection plz more help.
http://ww1.microchip.com/downloads/e...tes/00900a.pdf

Here's some 3 phase for the PIC18F2431 chip. http://www.picbasic.co.uk/forum/cont...-DT-interrupts

[ScaleRobotics]

For that, I would use their source code! http://www.microchip.com/stellent/id...pnote=en020394

The first link I shared only covers the

how to create a phase difference of 120 degrees and calculate the value of sine table, timer interrupts and frequency.

part.

[gaikieuuc]

Once more , thank ScaleRobotics !

[gaikieuuc]

And for 3 phase Power Control PWM, using a bit of Bruce's 18F2431 example :

PTPERL = 206 'for 21.6khz
PTPERH = 1

Let me just how to calculate
And timerone = 60950 ;gives about 60 htz sine
Let me just how to calculate 60950

And if I declare : PTCON0 = 0x00 ’Postscale 1:1, Prescale 1:1, Free Running
PTCON1 = 0x80 ’PWM time base is on, count up!
PWMCON0 = 0x20 ’Enable PWM0-1, Complementary
PWMCON1 = 0x40

I give 6 pwm (pwm(0-5)) connected to 6 IRG4PH50UD (3 phase inverter bridge)is ok ? Thank a lot!

Here's some 3 phase for the PIC18F2431 chip. http://www.picbasic.co.uk/forum/cont...-DT-interrupts