Rigol DP832 replace 80mm stock fan with 92mm
Description
I Made This Fan Duct, To Mount A 92Mm Fan In The Rigol Dp832 Power Supply. The Rigol Dp832 Power Supply Is Unfortunately A Bit Too Noisy For My Taste. I Did A Little Bit Of Research What Other Users Do To Minimize The Noise, But I Did Not Like Any Idea Others Came Up With, So Here Is Another Idea. ;-) In My Rigol Dp832 Is A Sunon Me80251V1-000C-A99 Fan Installed: Rated Speed: 3200 Rpm Air Flow: 69.65 M³/H Static Pressure: 4.57 Mm H₂O Acoustic Noise: 33 Db(A) Current @ 12V (Measured): 136Ma I Could Not Find A 80Mm Fan Which Had A Similar Air Flow And Is Much Quieter. Luckily There Is Just Enough Room In The Power Supply For A 92Mm Fan With A Fan Duct. I Used The 92Mm Fan Noctua Nf-A9 Pwm: Rated Speed: 2000 Rpm Air Flow: 78,9 M³/H Static Pressure: 2,28 Mm H₂O Acoustic Noise: 22.8 Db(A) Current @ 12V (Measured): 65Ma Here Is A Quick Video To Show/Here The Difference Between Stock Fan And The Noctua. (Noise Compare Is At The End Of The Video) <Iframe Width="560" Height="315" Src="Https://Www.Youtube.Com/Embed/9Syxvpyladm" Frameborder="0" Allow="Autoplay; Encrypted-Media" Allowfullscreen></Iframe> The Rigol Dp832 Has A Fan Fault Detection By Monitoring The Consumed Current By The Fan. The Noctua Nf-A9 Pwm Consumes Not Enough Current, So It Triggers The Protection And The Rigol Dp832 Switch Off The Outputs. To Consume More Current I Add Two Additional Sunon Ha40201V4-000U-999 Fans, Each Fan Consumes 40Ma. The Original Fan Draws 136Ma And The Three Replacment Fans Drawing 145Ma In Sum. Thanks To Travis Howse For His Awesome Example: Https://Www.Youtube.Com/Watch?V=_2R9Bwsvwdm (This Was My First Try With Openscad, Maybe Not Very Elegant, But It Worked...)
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