How to build a capacitor bank charging circuit? and Malala Yousafzai speaks at World Bank headquarters on the International Day of the Girl

How to build a capacitor bank charging circuit?

How do I build a charging circuit for a 9000uF 450V Capacitor bank? Materials? Procedure? Thanks


bank best answer:

Answer by Larry G.
A simple circuit: Step-up transformer, 120VAC primary, 300VAC secondary, bridge rectifier.

The transformer current rating would depend on how quickly the capacitor bank need to charge, after discharge. A secondary current (rated) of 100 ma would limit the secondary current (due to core saturation), to 200 ma or so. This is 60 watts dissipation for a few seconds, low enough to be of no concern.

The capacitor bank would charge to 420Vdc or so, and could be left connected for as long as you wished.

Safety note: 420Volts at 100 ma is VERY dangerous. Do not touch anything in this circuit without another person present; plus all of the normal safety procedures (automatic shorting bar to be sure caps are discharged, before working on circuit).
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Malala Yousafzai speaks at World Bank headquarters on the International Day of the Girl


Image by World Bank Photo Collection
October 11, 2013 - Washington DC., 2013 World Bank / IMF Annual Meetings. A Conversation with Malala
Malala Yousafzai, the 16-year-old from Pakistan, spoke Friday at World Bank headquarters with World Bank Group President Jim Yong Kim, about her passionate fight for girls' education. A year ago, Malala was shot in the head by the Taliban as she was returning from school on a bus. Photo: Simone D. McCourtie / World Bank

Photo ID: 101113-JYK-MALALA086F

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