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What uses DC current and why?

mink_man · 2011-04-08 17:18:10

it's me again, what uses just DC current and why does it have to be DC current and how is the application operation achieved?

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08-04-2011 6:18pm

#1

mink_man

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it's me again, what uses just DC current and why does it have to be DC current and how is the application operation achieved?

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#2 10-04-2011 3:50pm
Antenna

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read this..
http://en.wikipedia.org/wiki/Direct_current

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#3 11-04-2011 4:04pm
pieface_ie

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Magnetic door locks are 24V DC do they can be got in 230V AC.

When the 24V DC is applied a constant magnetic field is set up energizing the magnet.

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#4 11-04-2011 6:54pm
Red Alert

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The LUAS does, and I'm pretty sure the DART trains do as well. It used to be a lot more common for big stuff like lifts that have to be speed-controlled until solid-state inverters made it possible to use AC.

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