The manufacturing process starts with the preparation of he magnetic plates that will compose the alternator nucleus. For this purpose, an automatic press is used to cut a matrix which has been designed in our R&D department with a tooth form ideal for this application. The magnetic plate is silicon treated to obtain a higher efficiency. Once cut, the plates are grouped in packs of variable thickness depending on the alternator power.
The alternator is mounted in a metallic structure upon which the tail is also fixed. This structure allows, through the use of brush collectors, the connection of the alternator to the vertical cabling without obstructing the horizontal rotation of the wind generator. Once the structure is assembled the protective casing and the nose cone are attached, both are made of fiberglass and epoxy.
The tail is mounted with a small inclination in order that it may fold up when the wind speed is very high, thereby avoiding damage to the generator. In normal operating conditions the tail is perpendicular to the plane defined by the blades, which in turn faces into the wind. The model Vélter B is a leeward design which means that the blades are also the tail (the generator faces away from the wind). In both models the pieces mounted on the blades are used to limit the rotational speed.
When the wind generator is
not rotating, the blade profile presents a maximum surface area towards
the oncoming wind, this allows start up at very low wind speeds. This can
be seen in the previous photograph.
You can see the manufacturing process of the new Velter XV by clicking here.