How do you transfer power to a heating element for a propeller?

Airplane propellers usually distribute glycol using centrifugal piping to remove ice because it is simple, and in other examples like pusher props they can use exhaust gas to heat the prop. In any case, there exists a more complex but functionally superior way of removing ice and that’s using resistive heating elements. The only problem is how does one go about designing a coupling to transfer power here? Any brushes in this application will wear out, I imagine. This sort of problem can be avoided in industrial motors with simply putting the magnets on the shaft, but that can’t be done here.