چكيده به لاتين
By increasing energy consumption and Due to in contrast the pollution of the environment, Attention to renewable energies has been increased. Among renewable energy sources, wind energy is one of the sources that have been considered for affordability and availability. In wind energy, it is required to use a gearbox in order to adapt the wind speed and the speed of the electric machine there by produce power and transfer torque which is commonly used by mechanical gears due to their high torque density. Torque is produced in mechanical gears with abrasion between the teeth there by they need lubrication and cooling and have low expecting life, high friction and low efficiency. These disadvantages have led the mechanical gear to be magnetic gear. The magnetic gears generate torque by interacting between the magnetic fields at the air gap distances which leads to physical isolation between the input and output shafts that can enhance reliability and reduce the maintenance cost. Nevertheless, Magnetic gears have suffered from low torque density. Recently, new topologys have been developed to increase the torque density. One of the most important topologys is the use of a stator structure that, Beside the solving this problem, it is also possible to make constant output speeds Arising from a variable input speed, which has a significant effect on the production of wind turbine generators. In addition, due to produce wind turbine system in compact size, the magnetic gear and generator integration topology is proposed. In this way, another stator is added to the magnetic-geared permanent magnet machine.
In this thesis, a variety of magnetic gears have been investigated and compared. A new topology has been proposed to increase the torque density and has been compared with other counterparts. In addition, a new scheme was developed to improve the performance of the generator integrated magnetic gear and compared with other counterparts. In this regard, Ansoft Maxwell software is used to examine the mentioned states and parameters.
Keywords:
Magnetic gear, wind turbine, permanent magnet, magnetic-geared permanent magnet, torque density, generator integrated magnetic gear.
