2016-10-02 02:06 PM
Hello,
I design 3 phase PFC controller in very high power rate up to 800kW with another manufacturer microcontrollers. But nowadays I want to jump ARM area. In this case, I choose STM32F334 micro and working its discovery board around 1 week. I know STM32 from 103 and 072 side very well.But in power side we need 6 fully independent PWM channel at least. I want to use it with center aligned mode. But when I looked at F334 i couldnt find something like that. All timers have only 3-4 output, some timer has 3 complementary PWM but this is usefull for me.In this design I have to have 2 more PWM to use charger.STM32F334 is very good uC to use but it is OK with that? Or I have to choose another one?2016-10-03 05:55 AM
Hi deveci.firat
From you input , I understand that you need 6 independent PWMs synchronized and not a 3 PWM signals with their complimentary signals. In this case, it is recommend that you interconnect two Timers (TIM1 and TIM8) to be synchronized as master/slave when slave in gated mode; Slave Timer outputs 3 signals synchronized with the 3 signals of master in start and stop. You can refer to this application note that may helps you: ''Digital PFC and dual FOC MC integration''You can have a look to these both helpful examples in STM32CubeF3:* ''TIM_6Steps'' example at this path: STM32Cube_FW_F3_V1.6.0\Projects\STM32F334R8-Nucleo\Examples_MIX\TIM\TIM_6Steps* ''TIM_BreakAndDeadtime'' at this path : STM32Cube_FW_F3_V1.6.0\Projects\STM32F334R8-Nucleo\Examples_LL\TIM\TIM_BreakAndDeadtime-Hannibal-2016-10-03 11:28 PM
Thanks Hannibal.
I want to try this picture with STM32F334. It has lots of timer so I can try with them usingsync. I can't find proper example of that but can anybody write one example for me.http://i.hizliresim.com/2j4zPN.jpg