Variable-speed drives based on multiphase permanent-magnet synchronous motors are an attractive alternative for a large variety of applications where high fault-tolerant capabilities are mandatory. Nevertheless, they are still vulnerable to rotor magnet demagnetization, as it is the case for three-phase permanent magnet synchronous motors. Then, monitoring the rotor magnets status is critical to reach the required reliability. In the present paper, a characterization of uniform rotor magnet demagnetization, which can be caused by severe over currents, for six-phase permanent-magnet synchronous motors, is presented. A non-invasive detection technique based on the reference voltage space vectors variation caused by a uniform demagnetization, exploiting the harmonic mapping of the derived α-β subspaces quantities, is presented. The theoretical analysis is validated by means of numerical simulations, and preliminary experimental tests.
Gritli, Y., Tani, A., Rossi, C., Casadei, D. (2018). Detection of Rotor Magnet Demagnetization in Asymmetrical Six-Phase Surface Mounted Permanent Magnet Synchronous Motor Drive. Institute of Electrical and Electronics Engineers Inc. [10.1109/ICELMACH.2018.8506688].
Detection of Rotor Magnet Demagnetization in Asymmetrical Six-Phase Surface Mounted Permanent Magnet Synchronous Motor Drive
Gritli, Y.Membro del Collaboration Group
;Tani, A.Membro del Collaboration Group
;Rossi, C.Membro del Collaboration Group
;Casadei, D.Membro del Collaboration Group
2018
Abstract
Variable-speed drives based on multiphase permanent-magnet synchronous motors are an attractive alternative for a large variety of applications where high fault-tolerant capabilities are mandatory. Nevertheless, they are still vulnerable to rotor magnet demagnetization, as it is the case for three-phase permanent magnet synchronous motors. Then, monitoring the rotor magnets status is critical to reach the required reliability. In the present paper, a characterization of uniform rotor magnet demagnetization, which can be caused by severe over currents, for six-phase permanent-magnet synchronous motors, is presented. A non-invasive detection technique based on the reference voltage space vectors variation caused by a uniform demagnetization, exploiting the harmonic mapping of the derived α-β subspaces quantities, is presented. The theoretical analysis is validated by means of numerical simulations, and preliminary experimental tests.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
