I have watched several videos about this topic. According to these videos, the torque of DC motors relies on the Lorentz force (a force that acts on moving charged particles in a magnetic field). However, the working principle of BLDC (or stepper) motors is based on the force between magnetic poles.
My question is: are these two type of forces different, or is it the same force which can be calculated with two methods? I guess, there are magnetic-electric and magnetic-magnetic forces in each motor, but why do they mention only one force per motor? Maybe they mention the dominant force?