What is peak force?

For iron core motors the peak force is the force generated by the motor just beyond the saturation point of the motor force constant. The actual value of the motor force constant is 14% less than the catalog value. The coils will heat up with 6 or 20 K/s depending on the motor series. Ironless motors lack a saturation point in the motor force constant. The peak force is determined by the tolerated material expansion due to an increased temperature of the coil. For ironless motors this increase is at 20 K/s.