| 摘要 |
The machine proposed here fits in the category of synchronous machines with rotating field. The machine consist of a stator and a rotor. The stator is composed of two concentric toroidal shapes : the external tore is similar to the stator of a synchronous machine, the internal tore is similar to the rotor on an induction machine . The air gap between the two stators is such to allow for the insertion of the rotor . The rotor is formed of by either permanent magnets made of neodimium or electromagnets. The machine is symmetrical with respect to a plane passing through the central magnet support disk . The symmetri guarantees greater stability however the machine is completely operational even if only one half side is developed. The external stator house the coils which produce the rotating field. This can be reinforced by eventually placing coils on the internal stator according to the project design to be realized . The rotor magnets are blocked by a squirrel cage structure which , during start-up , facilitates synchronization . Startup is obtained through an electronic variable frequency generator which provides greater elasticity in the number of rotations desired . The advantage of the double air gap is that it doubles the attraction betwen magnets and rotating field. The machine, when hooked to a prime mover, becomes a generator. <IMAGE>
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