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Confusion with selecting DC-link capacitor

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doncarlosalbatros

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I'm recommended to install a 10000uF Aluminium Electrolytic capacitor for a 72 DC-link of an inverter for regenerative purpose. When it comes to details, one manufacturer mentions "inverter" in applications the other mentions general industrial electronics.

Is there any significant difference between these two capacitors.

Cap 1 Cap 2

Since it is based o n marketing I couldn't find a way to justify. Which parameters should I check for such application?
 

Hi,

they are about compareable.

I´d prefer the TDK type:

Less max ESR (@ 100Hz): TDK: 18mOhms / Vishay: 21 mOhms

about same IRipple (100Hz, 85°C): TDK: 10A / Vishay: 10.5A
but you use it in an inverter, thus you should also consider high frequency ripple current capability:
(10kHz, 85°C): TDK = 10A x 1.3 = 13A / Vishay = 10.5A x 1.15 = 12.1A

about same size.
Additionally TDK is less expensive.

Klaus
 
Hi,

they are about compareable.

I´d prefer the TDK type:

Less max ESR (@ 100Hz): TDK: 18mOhms / Vishay: 21 mOhms

about same IRipple (100Hz, 85°C): TDK: 10A / Vishay: 10.5A
but you use it in an inverter, thus you should also consider high frequency ripple current capability:
(10kHz, 85°C): TDK = 10A x 1.3 = 13A / Vishay = 10.5A x 1.15 = 12.1A

about same size.
Additionally TDK is less expensive.

Klaus

Thank you very much!
 

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