topic Re: complementary pwm with dead-time in LPC Microcontrollers

complementary pwm with dead-time

mohit2904 — Mon, 29 May 2023 06:56:07 GMT

Hello,

I am trying to implement complementary PWM with dead-time for UPS application.

But as you can find in attached image dead time is working but not getting complementary PWM with this.

I am attaching Source code Please check and support me to solve this issue.

Re: complementary pwm with dead-time

Alice_Yang — Thu, 01 Jun 2023 05:33:07 GMT

Hello @mohit2904

How about use MCUXpresso peripheral tool to config complementary PWM signals,

then generate code, refer to the code:

If still can't work, how about send your whole project to me , I help to check on my side.

Alice

Re: complementary pwm with dead-time

mohit2904 — Wed, 31 May 2023 05:48:04 GMT

Dear Alice,

Thanks for your response please find the attachment for MCUXpresso peripheral tool settings and also find my complete project file and confirm what is issue exactly to getting complementary PWM in my case.

Re: complementary pwm with dead-time

Alice_Yang — Thu, 01 Jun 2023 08:58:57 GMT

Hello @mohit2904

I tested your project on my side, find the issue,

Please change

/* SCTimer output 1 mask */
#define SCT0_OUTPUT_1 (1 << kSCTIMER_Out_1)

/* SCTimer output 1 mask */
#define SCT0_OUTPUT_1 (0 << kSCTIMER_Out_1)

Then it can work well, below is my test result:

Alice

Re: complementary pwm with dead-time

mohit2904 — Thu, 01 Jun 2023 09:30:50 GMT

Thank you @ Alice_Yang !!!

For your support it is working now after doing changes suggested by you...

Re: complementary pwm Rise time

mohit2904 — Mon, 26 Jun 2023 05:48:06 GMT

@Alice_Yang

Hello Alice,

We are using SCT0 to generate complementary PWM that we have done but we need to adjust rise time around 2 nsec in our case so please help us how we can change it.

Re: complementary pwm Rise time

Alice_Yang — Mon, 26 Jun 2023 11:24:13 GMT

Hello @mohit2904

This thread is too long, about your new question, please create a new case with more detail description,

thanks.

Alice