Due to the randomness of wind energy, the frequency and voltage of the electric energy generated by the small wind turbine are unstable, and the battery can only store DC power and cannot directly supply power to the AC load. Therefore, in order to provide stable, high-quality power to the load and to meet the AC load power, it is necessary to add a power converter between the small wind turbine and the load.
The rectifier is one of the power conversion devices in the small wind turbine. Its main function is to rectify the three-phase AC output from the small wind turbine, and the rectified DC power is charged to the battery through the controller. Generally used are three-phase bridge rectifier circuits.
Another important function of the rectifier in the wind power branch is that the output power of the wind turbine is also small when the external wind speed is too small or substantially no wind, because the diode conduction direction of the three-phase rectifier bridge can only be From the output of the wind turbine to the battery, the reverse supply of the battery to the wind turbine is prevented.
In a small independent wind turbine system, there is a wind turbine driven alternator that needs to be equipped with a suitable rectifier to charge the battery. According to the capacity of the wind power generation system, the rectifier is divided into two types: controllable and uncontrollable. The controllable rectifier is mainly used in a system with high power, which can reduce the large volume and large loss caused by excessive inductance; the uncontrolled rectifier is mainly used in a small power system.http://www.titanwindturbine.com/