Forums

3 phase sine wave PWM generation from LPC2148

Started by blue...@gmail.com January 2, 2013
i am using lpc2148,MCB2140 board from keil.com to generate 3 phase sine pwm to drive a Smart power module...
but i am not been able to provide the exact type of sine wave pwm with phase shift of 120 deg,and 240 deg respectively with the help of software programming,can anybody help me with this thing,i am actually totally new to this field but i tried to write a program myself to do it..
also help me with me how to use sine look up tables in LPC2148..
please help..

An Engineer's Guide to the LPC2100 Series

--- In l..., bluespidey88@... wrote:
>
> i am using lpc2148,MCB2140 board from keil.com to generate 3 phase sine pwm to drive a Smart power module...
> but i am not been able to provide the exact type of sine wave pwm with phase shift of 120 deg,and 240 deg respectively with the help of software programming,can anybody help me with this thing,i am actually totally new to this field but i tried to write a program myself to do it..
> also help me with me how to use sine look up tables in LPC2148..
> please help..
>

Do some research on Google. The Microchip PIC18 is commonly used for generating PWM to drive polyphase motors:
http://ww1.microchip.com/downloads/en/appnotes/00843a.pdf

Microchip has a lot of app notes on motor control. Take the info and see if you can port it to an LPC2148.

Look around at NXP. They have a lot of app notes but I haven't looked for one related to motor control.

Richard