COMMUTATORLESS AC MOTOR Russian patent published in 2009 - IPC H02K57/00 H02K16/04 

FIELD: electricity.

SUBSTANCE: invention relates to the field of electrical engineering immediately dealing with design of frequency regulated ac motors and is to be implemented for design and manufacture of an electric drive enabling smooth and cost-efficient adjustment of the shaft speed within a wide range of its measurements with the starting torque value maintained sufficiently high. The proposed commutatorless ac motor contains an armature with insulated short-circuited windings rigidly mounted on the shaft and a stator composed of two parts that have separate excitation windings. The stator first part is designed as poled and asynchronous; the stator second part is circular-shaped having projections and axial grooves arranged alternatively on the inside. A match of a projection and a groove arranged on diametrically opposed sides of the stator has a redoubled width.

EFFECT: simplification of design, cost-efficiency and provision for smooth adjustment of the shaft speed within a wide range of its measurements with the starting torque value maintained sufficiently high as well as essential reduction of the motor cost.

3 dwg