Electronic – use a charger to power a motor

battery-chargingchargerdcdc motor

I working on a home pet project for which I bought a rather powerful moter. It is a 24V 90W motor, which says the "Load current" is 5.7A.

I now want to power it with my wall power, so I thought of buying a car battery charger to make the motor run. Something like this for example:

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In the description it says it has the following properties:

Rated Power: 50-60Hz
Power: 140W
Actual Output Current: 12V-10A   24V-7.5A

As far as I understand it simply gives 7.5A at 24V, so that should do it. But since I'm an enormous beginner I don't actually know if this would work at all.

Does anybody know if I can buy this to power my motor? All tips are welcome!

Best Answer

Any DC motor that does not have an electronic speed controller (ESC) will draw much more that rated current for a fraction of a second or so when it is first switched on. Any type of electronic power supply needs to be able to supply that current for a brief time. Look for the "stall" or "locked rotor" current of the motor.

If you don't need speed control, the best alternative is probably to buy a 150 VA transformer and a rectifier. The motor will probably operate ok with full-wave rectified, un-filtered DC power from a 24 VAC source.

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