Respected Mr. Loren Rademacher, retired motor designer of GE, commented on my work at Quora. com

“You spend a lot of time talking about the effect of attraction between a magnet and an un-energized pole piece. This is normal behavior in a PM motor. During part of the rotation the magnet pulls the pole in the direction of rotation; and then as the pole passes the magnet, the magnet tries to pull the pole back. Thus there is a pulsating torque with no net average effect and it can be ignored except for the vibrations and noise that it might introduce into the system. Motor designers call this effect ‘cogging’.”

My argument

This answer proves that attraction during repulsion is not unfamiliar to motor designers. It is already accepted in PM motor technology as: ‘the magnet tries to pull the pole back’. Permanent magnet cannot attract the pole back without creating an unlike pole_ the third pole into the iron core of the electromagnetic pole.

This answer also states that permanent magnet provides matching force when “the magnet pulls the pole in the direction of rotation”, but this matching force is balanced (wasted) by the opposing force of attraction, which happens during repulsion: “and then as the pole passes the magnet, the magnet tries to pull the pole back”.

Result: permanent magnet ‘works’ in PM motors but this work is cancelled by the attraction between the permanent magnet and the unlike third pole (created by permanent magnet in the iron-core of the electromagnetic pole).

In other words, permanent magnet fully works in a motor but the form of this work is alternative like alternative current. Work of the permanent magnet is cancelled by the counter work of the same permanent magnet. Why cannot the counter work be reduced by better designing of motors to get more resultant force?

This answer also proves that the creation of the unlike pole is not limited to single poles or mono poles repulsion. The third pole must also be created in dipole magnetic systems because ‘the magnet tries to pull the pole back’ in a motor while motors always work on dipole magnetic system.