Complementary PWS signal

[ahmedfotoh]

the same intervalthere is lag between themHi ,I use stm32f401rct6 board ,I need to generate two pairs of complemdntary pwm signal to drive 4 igbt for dc full bridge converter in soft switching way,

How can achieve two pairs by some leg between them as shown in picture?

 

[AScha.3]

Hi,

most simple way: just make/set a complementary output with deadtime and adjust the deadtime to get the "gap".

(on advanced timer  )

 

Other way would be "combined PWM" - but F4 dont have this. F303 can do this...or other ...F7 , H7 etc.

[ahmedfotoh]

When set TIM1 CH1 and CH2 to generate two pair of complementary signal there is no lag between them, but I need to make lag as shown in picure

[TDK]

Use two different advanced timers, set them to start at the same time through a trigger, but set CNT of one of them to 0 and the other to the delay you want between them.

Can't do it with a single timer.

[ahmedfotoh]

Therefore, my stm32f4 must be changed to another board that has more than one advanced timer

[AScha.3]

You need/want two complimentary signals with delay between them ,

so need :

- two timers with can have deadtime (maybe F303)

- a very complex "advanced" timer , that can generate "combined mode" with complimentary channels

- use your actual F401 and its timers to just make two 50:50 pwm signals, that can have phase shift from 0...100% between the output signals, and do the complimentary signal and deadtime with a gate driver, that have built in deadtime. (I used Si82394 for this, or IRS2008 ; or just look at mouser , there are many drivers to choose:

https://www.mouser.de/c/semiconductors/power-management-ics/gate-drivers/?type=Half-Bridge&instock=y&sort=pricing