  Oscillators and rotators are among the most important physical systems. For
centuries the only known rotating systems that actually reached the limits of
the ideal situation of undamped periodical motion were the planets in their
orbits. Physics had to develop quantum mechanics to discover new systems that
actually behaved like ideal, undamped, oscillators or rotators. However, all
examples of this latter systems occur in atomic or molecular scale. The
objective of the present letter is to show how the limit of ideal oscillating
motion can be challenged by a man-made system. We demonstrate how a simple
model electromechanical system consisting of a superconducting coil and a
magnet can be made to display both mechanical and electrical undamped
oscillations for certain experimental conditions. The effect might readily be
attainable with the existing materials technologies and we discuss the
conditions to circumvent energy losses. The result is a lossless system that
might generate hundreds of Ampere of rectified electrical current by means of
the periodical conversion between gravitational potential, kinetic, and
magnetic energies.
