Voltage Control of the Magnetoelectric Generator Based on the Change of the Magnetic Resistance of the Auxiliary Flux Circuits

The system of automatic voltage stabilization of a three-phase magnetoelectric generator with magnetic flux shunting in the conditions of robot speed change is considered in the work. The magnetoelectric generator is intended for use in autonomous installations of small generation of the electric power. The generator is created on the basis of the serial asynchronous electric motor that provides economy of production of a power source. The voltage of the generator is controlled by changing the magnetic flux of the working area using the current of the stationary winding of the shunt, powered by direct current. A mathematical model of a magnetoelectric generator with magnetic flux shunting in the rotor coordinate system is presented. Algorithms for shunt current and generator voltage control based on the method of inverse dynamics problems in combination with minimization of local functionalities of instantaneous energy values were synthesized, which provided simple synthesis, dynamic system decomposition and low sensitivity to parameter changes. The operating characteristics of the experimental sample of the magnetoelectric generator are presented, which show the possibility of voltage control. The quality of generator voltage control when changing the rotor speed within ± 15% of the nominal value was studied. The developed control system provides astatic voltage regulation.