SYNCHRONOUS MOTOR Russian patent published in 2004 - IPC

FIELD: electrical engineering, namely mean- and high-power induction motors, possibly used in traction drive systems of electrically driven transport vehicles, drive units of propellers, of large-size pumps, of conveyer and hoisting transport vehicles and so on.

SUBSTANCE: induction motor includes stator having mounted in housing ferromagnetic poles embraced in radial direction by coils of phase winding. According to invention boundary poles of stator at side of each end of motor are combined by means of magnetic circuits for closing working magnetic flux. Rotor of motor is in the form of row of discs arranged across rotation axis and supporting ferromagnetic poles. Poles of stator are arranged at both sides of end surfaces of poles of rotor through air gap. Number of discs of rotor is determined according to desired power of motor and its axial size. At operation of motor controlled pulses are alternatively supplied to coils of each phase from autonomous switching unit. In the result magnetic flux is created; said magnetic flux passes through poles of rotor, stator, air gaps and it is closed in magnetic circuits of stator at side of each end of motor. Harmful crosswise magnetic forces exist only between boundary poles of stator secured to housing of motor. There are no such forces between inner poles of rotor and stator.

EFFECT: reduced size and mass, enhanced operational characteristics of motor.

3 dwg