I am trying to build a DIY one-way peristaltic pump with a 12V 100W DC motor (possible candidate : https://www.ebay.com/itm/DC-12V-100W-13000-15000rpm-775-motor-High-speed-Large-torque-DC-motor/352550303190)
which will be controlled by something like this PWM controller (10-50V, rated for 40A continuous & 60A max current) (https://www.ebay.com/itm/DC-10-55V-12V-24V-48V-30A-PWM-DC-Motor-Speed-Driver-Controller-Soft-Start-Switch/322616619257)
and will be powered by an SMPS supply such as this 12V 20A supply (https://www.ebay.com/itm/AC-to-DC-240-Watt-12-24-Volt-20-10-Amp-LED-Driver-Switching-SMPS-Power-Supply/183703093948)
So my question is:
- Will this setup work?
- Is either of the PWM controller or SMPS supply overkill or underwhelming?
- If this setup works, is it because of the PWM?
I ask because I've heard that DC motors draw 5~10 times their normal running current when they start up, so such setups involving SMPS power supplies may regard the initial current spike as a problem and may fail to 'turn on' properly, but a PWM helps with that problem.
But my understanding is that a PWM turns the flow of electricity on/off really fast so as to modulate the total electricity passed through but the current load (amps) stays untouched, so I'm not really sure what happens here.