190712-1415 EDT


You are making something simple look complicated. Don't bring in extraneous factors.

Again you are mixing counter EMF with current.

The basic simple factor is that current and torque are directly related when the magnetic field is constant in which the current is flowing. If you can not supply the current required for a given torque, then you can not produce that torque.

If a motor and its source voltage can cause enough current to flow with a given load, then there is some speed balance point where the needed current will flow to produced the needed torque at that speed balance point.

At that speed balance point the Vsource - Counter EMF divided by the armature resistance will equal the current required to produce the needed torque at that balance point.