  The changing magnetic fields of the Sun are generated and maintained by a
solar dynamo, the exact nature of which remains an unsolved fundamental problem
in solar physics. Our objective in this paper is to investigate the role and
impact of converging flows toward Bipolar Magnetic Regions (BMR inflows) on the
Sun's global solar dynamo. These flows are large scale physical phenomena that
have been observed and so should be included in any comprehensive solar dynamo
model. We have augmented the Surface flux Transport And Babcock LEighton
(STABLE) dynamo model to study the nonlinear feedback effect of BMR inflows
with magnitudes varying with surface magnetic fields. This fully 3D realistic
dynamo model produces the sunspot butterfly diagram and allows a study of the
relative roles of dynamo saturation mechanisms such as tilt angle quenching and
BMR inflows. The results of our STABLE simulations show that magnetic field
dependent BMR inflows significantly affect the evolution of the BMRs themselves
and result in a reduced buildup of the global poloidal field due to local flux
cancellation within the BMRs, to an extent that is sufficient to saturate the
dynamo. As a consequence, for the first time, we have achieved fully 3D solar
dynamo solutions in which BMR inflows alone regulate the amplitudes and periods
of the magnetic cycles.
