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Question:

Can I use this router speed controller to vary a small DC motors speed?

How would I wire the AC cord just hot to hot and ground to ground like usual? Would this just vary the voltage or regulate speed by PWM? It's really just for testing something, so I need something cheap and accessible that will do the job, since they sell these down the street at Harbor Freight...

Answer:

I don't think this will work at all for a DC motor. This type of speed control is meant for universal AC motors. To get good speed control of a DC motor you need a PWM (pulse width modulation) type of control. You can just vary the DC voltage applied to the motor but this can cause jumps in the motor speed if it has much of a load on it. One way is to get a variable 12 VDC power supply. Another option is to look into the speed controls for model train sets. They may work for you. Ask the sales person if they provide AC or DC and at what range.
costly pa, thank you, am effective such as then you pa am one dc tension manufacture effective in actuality am run the dc motor from its base velocity to its rated velocity by utilising area administration use thyristor i.e. right here the dc motor controlled from AC enter to dc output we are saying because it quite is rectifier yet on your case use proper capability transistor administration by utilising the generated pulses.

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