Magnetostatic Voltage/Current Limiting System for Wind Turbine Generator Comprising the Same

摘要

A magnetic voltage/current limiting system is mounted in conjunction with a main coil, in a coil assembly of a wind turbine generator, for limiting the outputted voltage (or current) to a predetermined upper value. The limiting system generally comprises at least one limiting coil and a control circuit connected to the main coil. The limiting system is configured to be activated when the voltage (or current) outputted by the main coil increases beyond the predetermined upper value. Once activated, the limiting system diverts a portion of the outputted current to the limiting coil such as to generate a magnetic field in the limiting coil. This additional magnetic field generally limits the amount magnetic field generated by passing magnets to flow through the main coil, thereby limiting the outputted voltage.

主权项

1) A generator comprising:
a ring-shaped rotor assembly connectively coupled with a rotating component such that the rotor assembly rotates around an axis of rotation with a rotation speed depending of rotation speed of the rotating component, the rotor assembly comprising a plurality of magnets; a ring-shaped stator assembly magnetically coupled with the rotor assembly, the stator assembly comprising a plurality of coil assemblies, one or more coil assemblies including:
a magnetically transmissive core component;a generating coil generating a current in response to a magnetic field induced in the core component as the rotor assembly rotates with respect to the stator assembly, the generating coil being winded around the core component;a first field limiting coil and a second field limiting coil electrically coupled with the generating coil, the first field limiting field coil and the second field limiting coil being disposed on each side of the generating coil and winded around the core component; and a field limiting control component diverting a portion of the current generated by the generating coil to the field limiting coils.