I have a particular set of requirements that call for a relatively high stall torque for the space available (300 ozf-in for < 8cm length of motor). The motor would be operating at a relatively low speeds (max speed of motor can be between 10-100 rpms) at a torque of about 200 ozf-in. The diameterical space available is less than 3“.
Initially I looked at some brushed DC motors and while there are some that meet these particular set of criteria, there is not much choice in terms of that package size.
So I decided to look at some BLDC motors usually used by hobbyists but the stall torque, rated torque, or speed-torque curves are not published anywhere. The motors quote only speed characteristics and I have yet to find one that publishes speed-torque curves.
I was wondering what kind of torques I could expect from these motors and if it would be sufficient for my needs. Are there any alternatives to the hobbyist motors that also come in a small package size?
I was also wondering if these motors could be operated at the low speeds I need (100 rpm), due to the commutation of the coils in the BLDC motor. If so, what kind of adverse effects could be expected by running it at such low speeds (maybe even below 100 rpm)?
Thanks for your help.