  A small dipole oscillator moving along a circular trajectory in zero-point
electromagnetic field ( ZPF ) and with a polarization normal to the rotation
plane, is considered. Temporal periodicity conditions are imposed on ZPF,
associated with the way the rotating oscillator observes ZPF. They are similar
to spatial boundary conditions in Casimir phenomenon and therefore result in
ZPF spectrum change from continuous one to a discrete one and, as a
consequence, an effective temperature of the modified ZPF (Y. S. Levin ). The
average centripetal average force on the oscillator, originating from this
modified ZPF scattered by the oscillator in the near zone, is calculated in
terms of the bilinear correlation functions of electromagnetic field. After
renormalization of the correlation function, which physically means extraction
of a pure effect of periodicity, the force has a finite value. All calculations
are carried out using the methodology of stochastic electrodynamics. The radial
component of the force is directed to the center of rotation. In non
relativistic case and for oscillator frequency smaller than rotation frequency,
the force turns out to be proportional to the rotation radius. Such result
could mean a possibility that micro motion of the oscillator in ZPF sustains
its average circular motion without any other external forces.Though the
estimation done for the point-like electron shows that the effect is not
observable because the radius of such circular electron motion would have been
much smaller than the classical electron radius when our semi classical
approach to the electromagnetic problem does not work. It is well expected
result and considered as the first step in the application of the idea in the
quark world governed by non abelian colored fields, subject of the next paper.
