About MATLAB Embedded Coder EPWM BLOCK

Hi Everyone ,

I’m trying to understand deadband structere of Epwm block . I could not understand a basic and simple point deadband time .(I have used Matlab2019b and F28379D Launchapd -200MHz- TBCLK:5ns)

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You can see following figure ,( this is a ‘Modeling Voltage Controller for the DC/DC Buck Converter’

(f28379D_DCDC_Buck.slx ) epwm block;

In dead band value were entered as 20.

What is the exact mean of 20 ? I mean This is a counter value of TBCLK according to the following help informations, isn’t it ?

*Actually what is the value of 20 in seconds?

Manythanks

Burak

Answer 1

[Venkatesh Chilapur]

Hi,

It is the count in-terms of TBCLK. In this case you mentioned TBLCK cycle is 5ns.

Hence the deadband time would be 20 * 5ns = 100ns.

That is the amount of time the ePWM-HI and ePWM-LO singals would be offset w.r.t each during the switching action.

HTH,

Regards,

Venkatesh C

[Burak Caykenari]

Thank you for response .

[Pablo Acuna]

is the TBCLK 5n (200M) or 20n (50M)?

I understand the launchpad has a X4 preescaler.