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HiperPFS-3 or -4 for PFC with 115V400Hz nominal?

Posted by: Roland Jeremies on

Hello,

is it possible to operate HiperPFS-3 or HiperPFS-4 with 115V 400Hz nominal?
PiXi Designer does not "prevent" using 400Hz, but it warns, that the frequency is "outside the standard range".
Are there any suggestions or experiences?

Regards

Roland

Comments

Submitted by PI-LeoDavinci on 12/20/2018

Hi Roland,

Good day. May we know what application are you targeting for such line frequency? Thank you very much.

Leo

Submitted by Roland Jeremies on 01/06/2019

Hello Leo,

and happy New Year :)

It is a test system to be used at standard AC systems as well as used for diagnostic purposes in an aircraft. The aircraft supply is typically 115V 400Hz AC. The test system is intended to be used "on ground" (no dedicated flight profile foreseen) but directly operated at aircraft supply.
And in order to prevent coupling issues with other aircraft systems, the test system needs to be power factor corrected (also on aircraft supply, as well).

Best regards

Roland

Submitted by PI-LeoDavinci on 01/11/2019

Hi Roland,

Good day. Upon further discussion and verification in our side, I would say using 400Hz input line frequency is alright. This shouldn't have any foreseen issue in the overall operation. Hope this helps.

Regards,

Leo

Submitted by Roland Jeremies on 02/13/2019

Hello LeoDavinci,
sorry for the delay...
you mentioned that you verified on your side: can you give some information how you verified?
Thanks in advance for a response.
Best regards
Roland

Submitted by PI-LeoDavinci on 02/21/2019

Hi Roland,

There was an internal discussion about the 400Hz application and we confirm that this is ok.

Regards,

Leo

Submitted by Jean on 10/05/2023

Hello Leo,

Do you know if the support of 400 Hz application has been maintained on Hiper_PFS_5 PFC ? We have maritime applications that also rely on this line Frequency.

PI Expert issues the following comment "User input outside of the standard line frequency range; Verify performance on the bench". At 400 Hz we do not require the maximum efficiency/pfc but we need to know if there will be no damage to the IC.

Regards,

Jean

Submitted by PI-Lupin the Third on 10/24/2023

Dear Jean,

Thank you for using Power Integrations products.

Upon consultation with our IC designer, there is no frequency fault that may be experienced which makes it possible to operate to higher line frequencies. However, the our peak detection has slow filter, which may lead to us detecting lower amplitude at 400Hz. This means that current and power delivery might be higher compare to same amplitude at 50Hz.

Otherwise, we expect it to work. But you may probably want to use a part with PFE disabled. PFE is specifically designed for 50 to 60Hz and will like make things worse at 400Hz. To date, applications engineering has come up with design up to 80Hz only. What we have discovered is a different peak current of the AC input. But we did not see any abnormality.

For completeness’ sake, it is still better to verify the performance in the bench for designs outside the recommended specifications.

Thank you!

Regards,

PI-Basilio