I'm having some trouble getting my 775 DC motor to run continuously with my 24V 10A SMPS power supply. I'm new to this stuff, so I'm not sure what the issue might be. I suspect it may need more current to function properly. I've seen videos showing 775 motors working with power supplies that deliver less than 10A, so I'm confused. Do you think using a motor speed controller would help, and if so, how? Here's a link to a video showing the motor connected to the power supply: https://youtube.com/shorts/GvdFxT5ohk4 (just remove the space before .com).
3 Answers
It sounds like you're running into some current issues. The 775 motor can draw up to 12.5A at 24V, especially under load. So while your power supply can theoretically deliver enough power, you might be experiencing a problem because of the high current demand when starting the motor. I’d suggest checking if the motor is faulty, or perhaps the wiring could be causing some issues as well.
Double-check how you’ve set up your ammeter. It needs to be in series with your motor connection; if it’s in parallel, it could give you an incorrect reading and make it look like the motor isn’t drawing enough current. Also, make sure the connections are solid as any loose wiring could cause issues too.
I’ve connected the multimeter directly to the motor; it should be in series, right?
The issue could also stem from your power supply entering protection mode. Sometimes brushed DC motors can require a lot of current to start, which might trigger your supply to shut off intermittently if it feels overloaded. You may want to test the output with a multimeter or a scope to see how it’s behaving under load.
I’ve watched several videos where similar setups worked perfectly with lower rated supplies, and I just bought this SMPS last week.
I’m using a 60W version of this motor, and I thought a 240W power supply would handle two of them just fine.