Power generator

Abstract

The invention provides a power generator which comprises a stator and a rotor. The stator comprises a stator iron core and a stator winding. Multiple stator slots which are uniformly distributed and obliquely arranged are formed in the inner ring of the stator iron core. The stator winding comprises a first layer winding, a second layer winding, a third layer winding and a fourth layer winding which are arranged in the stator slots in turn in a penetrating way. The first layer winding and the second layer winding form a first set of three-phase windings. The third layer winding and the fourthlayer winding form a second set of three-phase windings. The slot numbers of the initial stator slots of the first set of three-phase windings and the second set of three-phase windings differ by 30 degrees of electric angle. Two sets of three-phase windings are utilized to form six-phase stator windings, and the power generator can continue to operate under load shedding when one or more phases of the power generator are out of order. Meanwhile, the stator slots are obliquely arranged to weaken the influence of harmonic electromotive force so as to reduce the waveform distortion rate of the no-load output voltage of the permanent magnet synchronous generator.

Description

technical field [0001] The invention relates to the technical field of generators, in particular to a generator. Background technique [0002] When the three-phase permanent magnet synchronous generator is running without phase, the rotating magnetic field of the stator is seriously unbalanced, and the stator will generate negative sequence current, which will cause torque pulse and stator vibration, and affect the output of the generator. In addition to the fundamental wave, the stator rotating magnetic field also has a series of high-order harmonics, which cause the overvoltage phenomenon of the stator winding. Seriously, it may even cause an accident. Therefore, the phase-opening generator with rated load needs to be stopped immediately. If the protection does not act in time, the generator will be burned. Contents of the invention [0003] In view of the above-mentioned problems in the prior art, the present invention provides a generator. By using six-phase stator w...

AI Technical Summary

Problems solved by technology

[0002] When the three-phase permanent magnet synchronous generator is running without phase, the rotating magnetic field of the stator is seriously unbalanced, and the stator will generate negative sequence current, which will cause torque pulse and stator vibration, and affect the output of the generator

serious and even cause accidents

Therefore, the phase-opening generator with rated load needs to be stopped immediately. If the protection does not act in time, the generator will be burned

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