Wind turbine for transforming flow energy of wind into useable rotation energy, has asynchronous motor that is fed from battery-supplied direct current source by commutator that is driven by direct current motor in normal operation

摘要

The turbine has a blade adjusting device (2) for adjusting a blade angle of rotor blades that are arranged to a hub. The rotor blades are adjusted by an asynchronous motor (4) in a normal operation and are rotated in their rim position in the normal operation. The motor is fed from a battery-supplied direct current (DC) source by a commutator (16) that is driven by a DC motor (14) in the normal operation. An electromagnetic switch (28) is arranged between the commutator and the asynchronous motor. The motor is electrically connected with an emergency power supply by the switch.