Modular wind generators for autonomous power supply to remote mining areas mineral resources

reliability of inductor generators create good prospects for their use
in wind power plants as an alternative to synchronous and
asynchronous electric machines that are currently in use. An obstacle
to such an application is the specifics of the design, construction, and
execution of modular machines with magnetic switching,
concentrated windings, and a distributed magnetic system integrated
into the wind turbine design. The purpose of the study is to consider
cause-effect relationships and establish relationships between
magnetic flux, EMF, the geometry of electric and magnetic circuits,
the structural arrangement of electric windings, and circuit solutions
of an automatic electromagnetic excitation system for the design of a
new type of generators.
The current issues of the effective use of an exciting magnetic flux
for voltage regulation in power supply systems powered by power
plants, the main generators of which contain a distributed magnetic
system with concentrated electric windings, are considered. The
optimal structural compositions and geometry of the ratios of electric
and magnetic circuits are determined from the machine's basic
calculation equation, which is obtained under the condition of
maximum magnetic flux. The reasons for the induction of variable
EMF in the DC excitation windings, which prevent the effective
magnetization of the machine, have been established. The location of
the electric windings is proposed, which makes it possible to weaken
or completely compensate for the pulsations of the magnetic flux
coupled with the exciting circuits. It is established that in order to
eliminate parasitic EMF in the exciting windings, it is necessary to
use two-circuit circuits for alternating switching of the magnetic flux
in the circuits, with sequential activation of the sections of the
windings of the exciting circuits. To completely eliminate these
EMFs, performing two-circuit magnetic flux switching circuits with
a common exciting winding is advisable. The methods and features
of the circuit implementation of the conditions of electromagnetic
excitation and maintenance of voltage constancy at the output of
generators of a new type are considered.