squibcakes
New Member
Hi,
I currently have a crude 24V battery load tester that I use to check the capacity of large lead acid batteries (in order of 200ahr). Its a big mother that has 3x 3ohm 1000 watt resistors in it. Normally I pull about 30amps during the load test.
I'd like to replace it with something physically smaller and lighter and was thinking of using some MOSFETS in replace of the wire wound resistors.
After doing a few calculations I'm finding that although the MOSFETS can handle the current (eg 6x mosfets drawing 5 amps each) the power they would dissipate is quite small eg 6watts each (i need around 1000w) using them purely as a resistive load.
Instead I would like to use the mosfets to switch an inductor/ coil at a certain frequency generating an inductive load.
How easy would it be to build my own coil?
Any other way to build this load tester that I haven't thought of?
Cheers
Squib
I currently have a crude 24V battery load tester that I use to check the capacity of large lead acid batteries (in order of 200ahr). Its a big mother that has 3x 3ohm 1000 watt resistors in it. Normally I pull about 30amps during the load test.
I'd like to replace it with something physically smaller and lighter and was thinking of using some MOSFETS in replace of the wire wound resistors.
After doing a few calculations I'm finding that although the MOSFETS can handle the current (eg 6x mosfets drawing 5 amps each) the power they would dissipate is quite small eg 6watts each (i need around 1000w) using them purely as a resistive load.
Instead I would like to use the mosfets to switch an inductor/ coil at a certain frequency generating an inductive load.
How easy would it be to build my own coil?
Any other way to build this load tester that I haven't thought of?
Cheers
Squib