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Actuator fault of a multicopter Unmanned Aerial Vehicle (UAV) may lead to a dangerous flight, and even damage the UAV. To ensure the flight safety in case of unpredictable actuator fault, many active fault tolerant control methods are studied in the last decade. An active fault tolerant method of a multicopter includes a fault detection, isolation and reconstruction (FDIR) scheme and a control allocation...
With the increasing percentage of wind power in the utility grid, grid codes require that wind turbines must have low voltage ride through (LVRT) capability. Considering that doubly fed induction generation (DFIG) systems have the tolerance capability, to overcome the drawback of LVRT operation of DFIG system using crowbar, a dynamic voltage restorer (DVR) is connected to the stator side to prevent...
The 1.5MW half-direct permanent magnet synchronous wind generator with 252 slots, 32 poles is investigated in this paper, and two kinds of generator designs according to permanent magnet embedded in different rotor positions are presented. Based on the fluid mechanics theory, the mathematical models of 3D fluid field that fluid flowing through the outer-surfaces of generators are established, and...
The 1.5MW half-direct permanent magnet synchronous wind generator with 252 slots, 32 poles is investigated in this paper, and two kinds of generator designs according to permanent magnet embedded in different rotor positions are presented. Based on the fluid mechanics theory, the mathematical models of 3D fluid field that fluid flowing through the outer-surfaces of generators are established, and...
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