| 摘要 |
The invention pertains to the field of power generation and can be used in electromechanical energy conversion systems, in particular in asynchronous short-circuited machines. The essence of the proposed invention is that the action of a rotating electromagnetic field of a stator on the short-circuited turns of a rotor winding extending through areas adjacent to the pole pitch limits of the stator is supplemented by the additional action of a rotating electromagnetic field of the stator on sections of the short-circuited turns of the rotor winding extending through areas adjacent to the limits of a half pole pitch of the stator. The present method and the machine variants based thereon make it possible to provide a machine in which the engine starting current ratio is lower by comparison with machines of the prior art because of the prevention of losses on the braking effect, which makes it possible to increase the starting frequency without load reduction and to use the machine in the most severe operating conditions with an increased load on the shaft, wherein the machine maintains the rotating field effect and can still be fully operational upon the disconnection of one phase, generating in the phase-disconnected winding a high-quality harmonic voltage for the missing phase. |
