Demagnetisation current due to short circuit effect on an inset permanent magnet motor
Paper i proceeding, 2019

A permanent magnet machine with inset magnets has been evaluated during short circuit of the machine. The machine has been analysed with a FEM program ANSYS Maxwell and parallel to that a Simulink model of the machine has been developed. The latter model, has used a matrix of the inductances as a function of currents in d and q-direction. The Simulink model predicts the currents accurately during the short circuit if the analysis is made for a sufficient span of currents. With the Simulink model the case that produces the most negative i d can be found.In order to analyse the actual flux density inside the magnet, a transient and static FEM-analysis is done and it is found that the corners of the magnets that is adjacent to the bridges that holds the rotor together is the most affected part of the magnet. Assuming that 1 mm's of the corners is anyway rounded off, the flux density is -0.1 T in the magnet material, in the investigated case which could be harmful for the magnet.

Modelling

saturation

Pm machine

Författare

Mikael C D Alatalo

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

Torbjörn Thiringer

Chalmers, Elektroteknik, Elkraftteknik, Elmaskiner och kraftelektronik

2019 Fourteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)
Monaco, ,

Drivkrafter

Hållbar utveckling

Styrkeområden

Transport

Energi

Ämneskategorier

Annan elektroteknik och elektronik

DOI

10.1109/EVER.2019.8813528

Mer information

Skapat

2019-12-26