Linear Motor Ironless vs Iron-Core: Force and Thermal

Overview of Technical Issues:

In iron-core linear motors, the iron core structure generates harmful heat through eddy current and hysteresis losses while simultaneously producing cogging forces that cause motion ripple; the heat dissipating structure insufficiently removes this thermal energy, leading to temperature rise that limits continuous force output and duty cycle. Ironless designs eliminate core losses and cogging but suffer from insufficient force density due to lack of magnetic flux concentration, requiring larger packages or higher currents to achieve equivalent force, which increases resistive heating in the coils. The goal is to optimize the architecture selection balancing maximum force density against thermal management capability for the specific application duty cycle and precision requirements.