A proposal of doubly-fed alternator for windmill application

The authors make attempt to solve the main problem of power energy windmill industry. It is producing of the standard electric energy from a “wild energy” when wind has different direction and speed. For solving this problem, they suggest a new design of windmill and a new design of alternator. The windmill has the vertical axis of rotation. The new design of double-fed alternator is suggested. The design has an additional generator providing current supply without brushes. This generator carries out the function of excitation. The results of electromagnetic calculation and heating calculation are shown. The 3D design of model is presented.