Since the Magnus effect was described in 1852, it is natural to try to drive wind turbines with it. As for the horizontal axis wind turbine, its structure is not difficult to understand as shown in the figure below. However, if it is implemented as a vertical axis wind turbine, the rotation directions of the cylindrical rotor on the windward side and the leeward side must be opposite, so that the torques will not cancel each other out, so as to drive the wind turbine. In the early days, it could only be made by means of gears and connecting rods, which was difficult to achieve because the structure was too bulky. In recent years, thanks to the rapid advancement of semiconductor technology, microcontroller and motor drive technology has matured, it is no longer difficult to realize this concept. The following video shows this original concept in the real world …
Magnus Effect & Darrieus Vertical Axis Wind Turbine (VAWT)
Delta A2 servo has many pulse sources, such as main encoder, auxiliary encoder, pulse command, which can be used for positioning command (PT mode), high-speed capture/comparison, E-CAM master pulse and so on. In addition, the various pulse sources can be also output from CN1 for the host controller to count. Due to the large number of parameters, it is often confusing. This article draws the relevant functions and parameters into a block diagram to facilitate quick and comprehensive understanding for readers’ reference.
The function of the wind turbine is to extract energy from the wind. The wind is flowing air, which has speed and therefore kinetic energy. When the wind flows through the wind turbine blades, part of the kinetic energy is transferred to the wind turbine to make it rotate. The wind turbine gains energy, and the wind loses energy, so the wind speed after flowing through the wind turbine will slow down. This article explains the calculation methods of wind energy and wind turbine power and efficiency, and provides a video to make it easier to understand.
This article introduces the efficiency comparison of various wind turbines, including common vertical axis wind turbines(Savonius and Darrieus) and typical three-blade horizontal axis wind turbines. Among them, the Savonius turbine is a drag type wind turbines, and the Darrieus wind turbine and the three-blade horizontal axis wind turbine are both lift-type. The efficiency comparison chart of various wind turbines and related videos are shown below. If you want to understand what the Savonius and the Darrieus wind turbines are, please refer to => Basic principles and types of Vertical Axis Wind Turbines.