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I was curious to whether a soft foam impregnated with a powdered ferromagnetic substance with a high permeability could be placed within this region. The foam acts as a spring whilst the powdered ferromagnet acts as core.Is there some aspect to this that I'm missing?
Also why aren't electromagnets used in a stack, when trying to create large stroke? Is it somehow really inefficient, harder to produce, or just not really suitable for the majority of systems that need a linear actuator?
Oh also a slight plug.
I'd have thought that by stacking you could can achieve a longer movement, with less wasted power since each region is closer, and the magnetic field falls off faster than a linear relationship...
I'm still relatively young and still have the chance to learn anything should I put energy into learning to do so.