METHOD FOR OPERATION OF A PERMANENT MAGNET SYNCHRONOUS MACHINE, AND A DEVICE IN AN ELECTRIC SYSTEM COMPRISING SUCH A MACHINE

摘要

A method for operating a doubly fed permanent magnet synchronous machine and a system including such a machine and a converter for feeding and withdrawal of power. The machine has two or more winding groups where at least one winding group is connected directly to a grid and at least one winding group has the possibility to be connected to the grid via a power electronics converter or directly.