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CCS/TIDA-010054: TIDA-010054-SW

Ngoc Anh
Prodigy 40 points
Part Number: TIDA-010054
Other Parts Discussed in Thread: TPS82130

H all,

I have a question related to the reference design of Dual Active Bridge TIDA-010054.

https://www.ti.com/tool/TIDA-010054

I have been designing a control law for single Dual Active Bridge to stablize the output voltage and evaluate it with my Simulink model. I have been also consulting quite a lot of references and the reference design by TI as well. And I see that most of the references consider the load as a resistor (probably for simplicity).

I have checked with my simulation and find down that the control loop is only stable with resistive load and not stable without load (it was clear in this reference design, whether or not the output voltage is stable without load. But my feeling is it's not the stable). I have also tested it with the load as a current source and it is not stable either. I dont understand this point. If you know the answer, could you please share with me why single Dual Active Bridge is not stable without load?

Thanks in advance,

Anh Nguyen

  • 0
    TI__Guru**** 191445 points

    Anh,

    In our internal notes section there is a flag for TPS82130.  Do you have a question about TPS82130?  That flag put this post in the non-isolated mid voltage buck converter form.  We can't answer any other questions about that reference design.  If you have no TPS82130 specific questions, I will get this question re-assigned.

  • 0 in reply to JohnTucker
    Prodigy 40 points

    Hi John,

    thank you for prompt reply. My question is exclusively related to Dual Active Bridge control (software) rather than the buck converter menioned above.

    Best regards,

    Anh Nguyen

  • 0 in reply to Ngoc Anh
    TI__Mastermind 43730 points

    Anh,

    We did not test under no-load condition. 

    What application are you considering a DAB for? 

    As the main aim for this design is battery charging the load is always assumed. 

  • 0 in reply to Manish Bhardwaj
    Prodigy 40 points

    Hi Manish,

    My application is to provide a constant voltage source for a DC/DC converter. That's the reasonI'm interested in a constant power load ( or a varying current source as the load) for single DAB. To this point, I need to make sure that the DAB should be working without load before current source is injected. However, my control loop is only able to stablize output voltage of single DAB with a resistive load. I'm wondering whether there is something in power electronics theory I am not aware of, or it's simply due to my control law.

    Did you also test this DAB with a battery pack/module? Is there any possibility to access the software for this design?

    Thanks in advance!

  • 0 in reply to Ngoc Anh
    TI__Mastermind 43730 points

    There is a Software Request link at the bottom of the page TIDA-010054 under software, please use that to get access to the SW. 

    No, we did not have access to the battery pack, hence only tested with res load. The control loop will be different for a battery pack. 

  • 0 in reply to Manish Bhardwaj
    Prodigy 40 points

    thank  you very much for the info!