INDUCTOR ELECTRIC MACHINE WITH DECREASED STARTING TORQUE AND ELECTROMAGNETIC REGULATION OF AIR GAP

摘要

The invention refers to contactless electric machines and can be applied in alternative power engineering. Its goal is to decrease the resistive torque starting the inductor electric machine with low angular rotation velocity and to simplify its kinematic scheme. The offered inductor electric machine with changing air gap delta and decreased resistive torque on the shaft at the instant of starting consists of motionless stator (1) with cores (4) and windings (11) placed radially on the inside part of stator (1), non-magnetic insertion (5) dividing magnetic fluxes of stator winding and that of traction electromagnet (9) and consisting in its turn of static and rotating parts. At the moment of starting with low angular rotation frequency the moving magnetic circuit (6) with the impact of back spring (12) is at the outermost right position on the rotor shaft when the air gap delta has its maximum width. The resistive torque on the shaft is minimum. With the increasing of the angular rotation frequency of the rotor (7), the stator current flows to rectifier (13) and then goes to the winding of the traction electromagnet (9) through semiconductor regulator (14). The rotor (7) moves under the influence of magnetic flux overcoming the forces of the back spring (12) thus decreasing the air gap delta, and as a result the resistive torque is increased. An selection of current regulation law of traction electromagnet by help of semiconductor regulator allows to obtain an optimal value of the air gap according to the rotation angular frequency of the shaft.