Hybrid excitation wind driven generator based on split magnetic steels

Abstract

The invention discloses a hybrid excitation wind driven generator based on split magnetic steels, which comprises stators and a rotor with helical teeth. The stators are arranged concentrically aroundthe rotor, and the inside ends of the stators are next to the helical teeth; magnetic steel grooves are formed between the stators, and magnetic steels with different polarities are respectively arranged at both ends of the magnetic steel grooves to form magnetic steel pairs; exciting windings are arranged between the magnetic steels to form stator permanent magnetic steels, and the stator permanent magnetic steels are alternatively arranged in a N->S form; and stator grooves are formed in the stators, and armature windings are arranged in the stator grooves. By dividing each permanent magnetinto both upper and lower sections, permanent magnet loss, eddy-current loss and magnetic hysteresis loss are reduced, an iron core utilization rate of the stators is improved, and a counter potential amplitude of the generator is increased; by the armature windings, armature copper loss is reduced; by the exciting windings, an end effect of the generator is reduced, and meanwhile, loss is reduced; moreover, a direct current cannot be coupled with the armature windings, so that a counter potential waveform of the generator is not influenced; by the closed magnetic steel grooves, leakage fluxis reduced, so that a utilization rate of the permanent magnets is improved; and by double excitation, power supply quality of a motor is ensured.

Description

technical field [0001] The invention relates to a generator, in particular to a hybrid excitation wind power generator based on split magnets. Background technique [0002] Nowadays, energy is the first driving force of social development, but the massive use of traditional fuels not only causes the decrease of these energy sources, but also brings a series of environmental problems such as air pollution and greenhouse effect. [0003] Therefore, the gradual transition from traditional energy to renewable clean energy is the general trend of energy development. The power source of wind energy is atmospheric movement, which is inexhaustible and will not cause any environmental problems. It is an ideal renewable energy source. [0004] The core component of wind power generation is the wind generator, among which the hybrid excitation wind generator is one of the main research directions. [0005] The hybrid excitation wind turbine adds a set of excitation windings to the tr...

AI Technical Summary

Problems solved by technology

Although the adjustment range of the magnetic flux of the hybrid excitation motor is larger than that of the pure permanent magnet synchronous motor, the introduction of the excitation winding also brings about the problem of large losses

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