I want to replace an AC motor with a DC motor

AI Thread Summary
The discussion revolves around replacing a 1.12 amp AC motor with a 12V DC motor for a rock tumbler powered by solar panels. Concerns are raised about the significant increase in current required for the DC motor, which would need over 11 amps to match the AC motor's power output. The importance of maintaining minimum torque, RPM, and low current is emphasized, along with the necessity of a suitable 12V power supply. Additionally, the use of 8 AWG wire for a 35-foot run from the solar panels to the controller raises concerns about potential voltage drop. Overall, careful consideration of electrical requirements and wiring is crucial for this motor replacement project.
ws309
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Ac motor is 1.12 amp 3000 rpm 60 Hz 1/30 Hp sealed ball bearing. I want to use a 12 V dc motor. Any help would be greatly appreciated. Thank you.
 
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Welcome to PF!

You didn't ask any questions; What, exactly, do you need help with?
 
That might be harder to find than you think unless things like Minimum torque, same RPM and low current are not important. Just looking at V and I you have 120V and 1.12A or 134W, a 12V motor would need over 11A for the same power. However, you are probably not using it at full load, so it might work, you didn't say enough.

Aside from the mechanical requirements, all you should need is a 12V power supply.
 
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Haklesup said:
all you should need is a 12V power supply.

I agree. 11A is nothing to sneeze at but certainly easily manageable. Just watch your wire size and you should be fine.

BoB
 
Haklesup said:
That might be harder to find than you think unless things like Minimum torque, same RPM and low current are not important. Just looking at V and I you have 120V and 1.12A or 134W, a 12V motor would need over 11A for the same power. However, you are probably not using it at full load, so it might work, you didn't say enough.

Aside from the mechanical requirements, all you should need is a 12V power supply.

russ_watters said:
Welcome to PF!

You didn't ask any questions; What, exactly, do you need help with?
I want to run my rock tumbler with solar panels and a battery bank. I don"t want to use an inverter. I am using 8 awg. wire and the longest run is 35' from the panels to the controller.
 
ws309 said:
I want to run my rock tumbler with solar panels and a battery bank. I don"t want to use an inverter. I am using 8 awg. wire and the longest run is 35' from the panels to the controller.
Thank you for the fast response.
 
ws309 said:
I am using 8 awg. wire and the longest run is 35' from the panels to the controller.

you are going to get significant voltage drop over that length of cable

what will be the loaded output voltage of the panel(s) ? ... and note that the stated panel voltage is usually an open circuit voltage
 
davenn said:
you are going to get significant voltage drop over that length of cable

what will be the loaded output voltage of the panel(s) ? ... and note that the stated panel voltage is usually an open circuit voltage
I am using 2 160 watt solar panels
 
ws309 said:
I am using 2 160 watt solar panels
That didn't answer my questions
 
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