Power Flow Maximization in Permanent Magnet Generators

G. CATUOGNO; D. FORCHETTI; R. LEIDHOLD; GUILLERMO OSCAR GARCIA

IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC

Lugar: New York; Año: 2014 vol. 61 p. 6566 - 6573

0278-0046

The main hypothesis proposed in this paper is that by controlling the harmonic and zero-sequence components of the current in no-sinusoidal permanent magnet synchronous generators (PMG) additional energy can be obtained, increasing thereby the machine power density without increasing the Joule effect losses. Two different strategies are proposed for 3-wire and 4-wire topologies; therefore 4 different cases are analyzed. The strategies consist in controlling the PMG stator currents, following a function that depends on the waveform of the back electromotive force (EMF). The current function is obtained from the instantaneous reactive power theory. An experimental system was built to validate the proposal. Experimental results prove that it is possible to increase power in a tested PMG by 7% using the 4-wire topology in comparison with the conventional block commutation and same losses. Higher power gain can be obtained for machines with almost rectangular shaped EMF waveforms.