Hi and thanks for the response!
I already implemented a 3x3 PWM (9 complementary outputs in total) to control a 3 phase system with 120 degrees in the PWM. I used HRTIM as master, TIM1 as master/slave and TIM8 as slave only.
There are 3 different duty cycles, each one for every phase.
What I did is to make 3 groups:
1) Group 1 - duty cycle 1
- HRTIM output 1 -- (phase 0)
- TIM1 output 1 -- (phase 120)
- TIM8 output 1 -- (phase 240)
2) Group 2- duty cycle 2
- HRTIM output 2 -- (phase 0)
- TIM1 output 2 -- (phase 120)
- TIM8 output 2 -- (phase 240)
3) Group 3 - duty cycle 3
- HRTIM output 3 -- (phase 0)
- TIM1 output 3 -- (phase 120)
- TIM8 output 3 -- (phase 240)
It works very good but if I want to add a break input (input in case of overcurrent) then my topology is not ideal at all, because the break input is per Timer.
That is the reason I asked if I can change my topology and to make all the 9 complementary outputs with the same 3 timers but, one timer per group (with 120 degrees between outputs).
So the ideal topology will be:
1) Group 1 - duty cycle 1
- HRTIM output 1 -- (phase 0)
- HRTIM output 2 -- (phase 120)
- HRTIM output 3 -- (phase 240)
2) Group 2- duty cycle 2
- TIM1 output 1 -- (phase 0)
- TIM1 output 2 -- (phase 120)
- TIM1 output 3 -- (phase 240)
3) Group 3 - duty cycle 3
- TIM8 output 1 -- (phase 0)
- TIM8 output 2 -- (phase 120)
- TIM8 output 3 -- (phase 240)
Is that possible?
Thanks!!
