Cross Saturation Inductance Analysis of a Permanent Magnet Synchronous Motor

Year 2018, Volume: 6 Issue: 3, 153 - 158, 31.07.2018

Lale T. Ergene , Murat İmeryüz Cihad Ekin

https://doi.org/10.17694/bajece.426284

Cited By: 2

Abstract

This paper presents the cross saturation
effect on a specially designed spoke type permanent magnet synchronous motor
(PMSM) for the sensorless vector control. The cross saturation effect becomes
very important where the sensorless control algorithm is used. Accurate flux
linkage modeling is required to obtain a satisfactory position estimation and
eventually minimum induced torque error. The magnetic saturation is the most
impacting parameters affecting the position error. Since the Ld and Lq
inductance difference is generally less than 5% in the spoke type PMSM, the
accurate estimation of the cross saturation is critical for the sensorless
vector control.  In this paper, the
designed PMSM has the Ld and Lq difference in 15% level even for the overload
capacity. So it is even possible to operate the motor in the transient modes
with the overload capacity by estimating right cross saturation effect with
certain time limits. The mapping of the inductances and efficiency are obtained
by using Finite element method and presented in the paper. Some experimental
results are also given such as efficiency and power-speed variation at the
constant torque.

Keywords

Permanent magnet synchronous motor, finite element method, cross saturation effect, d-q inductances, sensorless vector control

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