Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Solid polymer electrolytic capacitor more vibration susceptible than wet electrolytic

Status
Not open for further replies.
T

treez

Guest
Hi,
We want to use solid polymer electrolytic capacitors in our 12kW electric drone power supply, for longevity.
But we hear they are more susceptible to vibration damage than wet electrolytics.
However, if we use a radial leaded solid polymer type, then surely the leads would “cushion” the vibration such that the solid polymer capacitor would not fail from vibration?

Solid polymer capacitor….
https://www.we-online.de/katalog/datasheet/870055975002.pdf
 

depends on the failure mode

capacitor failures:
if you mount it vertically, the leads may stretch under vibration
and the actual capacitor inside the case may be stretched also
and it will jump up and down

if you mount it horizontally, you can put a strain relief in the leads
but you'll need to glue the case to the board somehow
then the actual capacitor inside can bounce back and forth inside the case

in either direction, the leads can break

since there is no information in the data sheet about vibration or shock,
i suggest you do the test

mount two or three vertically and two or three horizontally on a typical pcb
they would be mounted on in your machine
test their electrical properties, vibrate in one direction and test again
repeat in the other two axis

vibration test should be at least 20% greater that the vibration you expect
if they pass, vibrate them again at 50% greater, etc

then you'll know

you might also vibrate a set of aluminum electrolytics at the same time
 

Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top