| Electronics > Projects, Designs, and Technical Stuff |
| How to limit inrush current into DC motor simple way? |
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| Chriss:
Practically the mentioned PSU should be a PC PSU who can delivery 16A. This is just for the testing process, not for long term use. It should power the motor so we can see how the mechanical parts are react... The motor is a car windshield wiper motor. This motor should stay for long term use. |
| Benta:
Are you sure the PSU is not current limited? I'd be surprised if it isn't. Otherwise, use a motorcycle or car battery, they're cheap. |
| Chriss:
I'm sure this psu is not current limited, I tried the motor once or twice and it worked but I won't do the whole testing cos I think I could kill the psu. It is a good idea to use a battery but at the moment we don't have a car battery, and we should use then a charger too cos the battery would probably not last the testing time which could be 1-2h. Maybe we need repeat the testing etc. But we have two or more psu's laying around and it is more convenient. Maybe the best way would be to make a simple soft-start tool wit an ne555 so I can adjust the pwm signal to smoothly start the motor. Maybe that would be the fastest way to do and I would have that tool for future project too. |
| Siwastaja:
Instead of 555, give it a shunt resistor and a comparator, and you have a proper current limit with approximately the same complexity. |
| Chriss:
Thanks for the idea. Can you pls share a schematic about your idea? Just to be sure how you mean to built that. Thank you very much. |
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