Thursday, Jul 13, 2017 at 23:12
Sure there where and still are crude
battery chargers that consist of little more than a transformer and a rectifier .... these have as would be expected fairly lumpy ( rectified sinewave) unregulated output..... with the addition of any crap that comes down the mains supply.
But there also where and are, properly filtered and regulated charging systems that where specifically designed to give a smooth output for the benifit of the equipment that they supplied
I have a ball tearer 20 amp regulated
battery charger here that outputs a pretty damn clean DC output.
It's one of my best second hand buys ever.
I also have several regulated supplies I use to charge batteries ranging from 500mA to 5 amps ... all
well regulated and giving a smooth clean output.
I also have several chargers that have dirty outputs and one or two that radiate quite a bit of spurious radiation such that it interferes with my workshop radio ( not connected to these chargers).
A device that is intended to charge a
battery alone, realy does not need to have a clean smooth output ..... however if you are running electronics off the
battery while it is being charged ..... it is advisable to use a charger or regulated supply with a
well regulated, clean smooth output.
I have a couple of small switch mode multi stage chargers .... the documentation on the large one shows that at different stages, pulses are deliberately introduced in the output.
In the desulphation phase high frequecy pulses are introduced...... in one of the rapid charging phases the charge current is delivered in short low frequecy pulses ...... I've never tried to run electronics of this charger, because I have better equipment for that purpose.
cheers
FollowupID:
882737