About MATLAB Embedded Coder EPWM BLOCK
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Burak Caykenari on 6 Sep 2020
Commented: Pablo Acuna on 6 Nov 2020
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)
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?
Venkatesh Chilapur on 7 Sep 2020
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.
Pablo Acuna on 6 Nov 2020
is the TBCLK 5n (200M) or 20n (50M)?
I understand the launchpad has a X4 preescaler.
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