About DC power supply capacitors

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botchan007
Level 1
Level 1
First question asked Welcome!

Hello.

I have two questions regarding the application note "EVAL_6EDL7141_TRAP_1SH".

There are three large electrolytic capacitors mounted on the evaluation board, but how do you determine the capacitance?
What is the role of this capacitor?

Best Regards.

 
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1 Solution
Vinay
Moderator
Moderator
Moderator
50 solutions authored 100 replies posted 250 sign-ins

Dear @botchan007,

Good Day!

Thanks for posting your question in Infineon Community.

 

The capacitors C1, C2 and C324 are DC link capacitors. DC link capacitors purpose is to provide stable DC voltage. It limits the ripple present in the DC voltage. DC link current will provide the required ripple current by the motor.

 

Please refer the below reference papers for better understanding of dc link capacitor design.

 

https://www.mdpi.com/2227-7390/11/9/2137

 

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9774905

 

Thank you!

 

Best Regards,
Vinay

View solution in original post

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1 Reply
Vinay
Moderator
Moderator
Moderator
50 solutions authored 100 replies posted 250 sign-ins

Dear @botchan007,

Good Day!

Thanks for posting your question in Infineon Community.

 

The capacitors C1, C2 and C324 are DC link capacitors. DC link capacitors purpose is to provide stable DC voltage. It limits the ripple present in the DC voltage. DC link current will provide the required ripple current by the motor.

 

Please refer the below reference papers for better understanding of dc link capacitor design.

 

https://www.mdpi.com/2227-7390/11/9/2137

 

https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9774905

 

Thank you!

 

Best Regards,
Vinay
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