TIDA-010054: peak current mode control of DAB converter

Ponsonby Rivers

Part Number: TIDA-010054
Other Parts Discussed in Thread: SFRA

I have the following questions on the TIDA-010054 reference design.

(1) Can you share a block diagram on how the peak current mode control (PCMC) was implemented. I understand the theory for (say) a Buck converter however, I'd like clarification on how one achieves PCMC for a 50% duty cycle converter.
(2) What is the purpose of the capacitors in series with the resonant inductor and transformer? Is this to prevent saturation of the magnetics?
(3) How did you calculate the compensator values? Was this done empirically using the SFRA tool or was there a theoretical calculation done and then optimised using the SFRA tool?
(4) In the software document, there is a simulation section which indicates TBD. Can you share this please?

over 4 years ago

0 Harish Ramakrishnan5 over 4 years ago

TI__Mastermind 24375 points

Hi,

We have still not implemented peak current mode control for this converter. That is the reason we have put capacitors in series with the inductor to prevent saturation of the transformer.

Thank you

0 Ponsonby Rivers over 4 years ago in reply to Harish Ramakrishnan5

Intellectual 620 points

Can you please answer the following questions:

(3) How did you calculate the compensator values? Was this done empirically using the SFRA tool or was there a theoretical calculation done and then optimised using the SFRA tool?
(4) In the software document, there is a simulation section which indicates TBD. Can you share this please?

0 Ponsonby Rivers over 4 years ago in reply to Ponsonby Rivers

Intellectual 620 points

Can you provide an update with my previous post?

Thank you in advance.

0 Harish Ramakrishnan5 over 4 years ago in reply to Ponsonby Rivers

TI__Mastermind 24375 points

Hi,

I ran the SFRA for the voltage and current loops separately, injecting small signal to observe the open loop response and plant response. Then I imported the excel into compensation designer to get the required coefficients for the respective loops.

The section titled TBD is currently incomplete as this part requires further controller tuning and is not optimized for transient performance. We except to have this part updated in the end of first quarter of 2021.

Thank you

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TIDA-010054: peak current mode control of DAB converter