Procedure to Determine Inductances of Permanent Magnet Generators

The increasing demand applications of permanent magnet generators (PMG) require a well design comprehension. Permanent magnet generators (PMG) parameters cannot be determined by using conventional test procedures due to the impossibility to control the magnetic field created by the rotor, so that new procedures need to be developed and standardized taking into account that the power of new PMG for large wind farms is increasing as is the need for power in laboratory facilities. A DC step voltage is an equivalent method that, analyzed with others, makes the determination of important PMG parameters possible. To validate the new method, results were compared with some possible standardized method. The comparison of results showed that de DC step voltage could help the parameter identification of large PMG for wind applications.