bunghole
New Member
hi guys,
i am trying to find a rheostat to control a 12vdc 80w fan motor.
i have measured the current withdrawal using an analog panel meter. i found this information, with fan blades attached:
startup (not rotating to max): 0 - 10amps, dropping to about 5 - 7 amps after approx. 2 seconds
running current: between 5 and 7amps
maximum power applied, holding rotor still: around 15amps
i have tried a 20amp rheostat from a cordless drill, although the controller feels like a sliding variable resistor, the output tends to use 'steps' of output power, similar to an emu.
i am running this fan off a 12vdc, 18Ah SLA.
if anyone has any ideas, please reply, or any advice for that matter. every little bit helps!
ta
i am trying to find a rheostat to control a 12vdc 80w fan motor.
i have measured the current withdrawal using an analog panel meter. i found this information, with fan blades attached:
startup (not rotating to max): 0 - 10amps, dropping to about 5 - 7 amps after approx. 2 seconds
running current: between 5 and 7amps
maximum power applied, holding rotor still: around 15amps
i have tried a 20amp rheostat from a cordless drill, although the controller feels like a sliding variable resistor, the output tends to use 'steps' of output power, similar to an emu.
i am running this fan off a 12vdc, 18Ah SLA.
if anyone has any ideas, please reply, or any advice for that matter. every little bit helps!
ta