Transductor
The transductor works on the principle that a strong magnetic inundation will saturate the iron core, so
it behaves as if it were air (RmagnFe ~ RmagnAir). If we replace the mechanical adjustment of the magnetic
shunt (section c.) with an electrically variable magnetic circuit, we get a transductor. A transducer has
an auxiliary winding through which a DC control current flows, controlling the magnetic flux φS in the
same way. This controls the magnetic resistance of the magnetic shunt. A transductor is also known
as a magnetic amplifier, as a small output can be used to control a large one. This adjustment
principle makes it possible to use an electrical control without any additional mechanical intervention.
This means it can be controlled remotely, which is a first step towards electronic power supplies