Electrolytic capacitor life if AC is switched on and off several times?

Question

I have a motor control drive, where a 115vac comes in, a triac is used to switch this AC supply. This 115vac is rectified to 115 x 1.414 =

163VDC. There is an MOV and NTC (for inrush current limiting), bridge rectifier and 330uF 315V electrolytic long life capacitor to store the charge.

If I switch this triac on and off 3000 times a day, allowing the 330uF elec cap to fully discharge and recharge 3 seconds later, will this greatly shorten the life of the elec cap? Is this where I have to pay attention to the ripple current rating?

Thanks, Mike

Phil Allison · Accepted Answer

"Michael Valencia"** What ratings apply to the MOV  ?** Depends on the MOV's  ratings.** Long as the cap is not getting hot - all is fine.....  Phil

Phil Allison · Answer

"Phil Allison"**Correction: ** What ratings apply to the NTC  ? ** Depends on the NTC  ratings. ** Long as the cap is not getting hot - all is fine.    ....  Phil

Joe G (Home) · Answer

OK... if you are getting "deep and meaningful" about capacitor life times then you may want to take a leaf out of the Nippon ChemiCon data book.

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See pages (2/10) onwards "PRECAUTIONS AND GUIDELINES"

Joe

Fred Bartoli · Answer

Joe G (Home) a écrit :Yep, and on the last page (10/10) of this section:Recovery voltage:After discharged aluminum electrolytic capacitor, the voltagewill be increasing again. This phenomenon is called by "Recov-ery Voltage". It happens very often and commonly for all alumi-num electrolytic capacitors. In this case, discharge through a1k? resistance before use at your process, because you mayhave trouble on sensitive devices and frighten a person work-ing with the capacitor.-- Thanks,Fred.

Phil Allison · Answer

"Fred Bartoli"**  ROTFLMAO  !!! Impossible to imagine anything  MORE IRRELEVANT  !!! Fuck  OFF  -   FRED the DEAD   HEAD   !!!...  Phil

Electrolytic capacitor life if AC is switched on and off several times?

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