I have a low speed, low torque application that I want to use a DC motor for. Here is a motor that satisfy my size requirement:
A photo is also attached.
It appears to be a brushed DC motor. But the rpm at around 20,000 and that’s way too high. I need about 500 to 1000 rpm. Again, the load is very light (close to nothing). To bring down the rpm, I can either use a gear train, or use PWM. I have a few questions:
A gear train trades rpm for torque, so if I get 1000 rpm at the output, I get a corresponding multiplier for torque. Is this also true for PWM speed control approach?
Is it even possible to bring down the rpm from 20,000 to something like 500 using PWM? That’s a super small duty cycle.
Can you recommend a general approach for my problem? FYI, I also want to reverse the spin periodically (I guess a H bridge is for this?)
I have been playing around with the 28byj-48 stepper motor lately. I guess I can use a stepper motor but I heard it’s not as efficient.