hello..
i'm using the controller P89V51RD2.
i got to generate 6 simultaneous PWMs for the inverter driver of the PMSM motor.
so can any one help me out in this.
i'm facing problem in getting the 6th PWM using P89V51RD2 and i got 5.

 

can anyone please help me in this..

 

Whats the frequency period you are after... If it's around 2khz you'll be able to do one in software...

 

how...?
in which s/w...?
and can i do that in keil compiler...?

 

and i got to run a 3 phase motor of 50hz through this inverter so now whatever is the freq of this required...

 

Set up timer 0 to count 127... if you use a prescale of 1:1 you should be able to generate a PWM out..

Two variables... On and Off
Off is always the opposite of On

so 50% will be on= 127 and off = 127

Every interrupt toggles between on and off..
If you pre-load the timer with one or the other value in sequence

So 25% will be off 192 and on will be 64
75% will be off 64 and on 192....

This maintains the period at @2khz with an 8 bit duty cylce.

 

that won't work cause i got to generate 6 PWMs.
and with the timer it won't be possible i think..