1 Introduction
2 Eddy current losses in PM of PMSM
2.1 Slot harmonics
2.2 Winding harmonics
2.3 Inverter-related losses
2.4 Loss distribution in electrical motors
Number of polepairs | \(p\) | 4 |
Number of stator slots | \(N_{1}\) | 12 |
Outer machine diameter | \(d_{m}\) | \(80\,\text{m}\text{m}\) |
Axial length | \(l_{m}\) | \(60\,\text{m}\text{m}\) |
Rated torque | \(M\) | \(3.9\,\text{N}\text{m}\) |
Magnetomotive force per tooth | \(\Theta\) | \(360\,\text{A}\) |
DC-link voltage | \(U_{\text{DC}}\) | \(565\,\text{V}\) |
Inverter switching frequency | \(f_{\text{pulse}}\) | \(64\,\text{k}\text{Hz}\) |
3 Source characteristics and analytic models
3.1 Source characteristics for eddy current loss calculations
3.1.1 Slot harmonics
3.1.2 Winding harmonics
3.1.3 Inverter-related losses
3.2 Yamazaki et al. [1, 2]
3.3 Sahu et al. [4]
3.4 Bettayeb et. al. [7, 8]
3.5 Mirzaei et al. [10]
3.6 Bode et al. [11]
3.7 Ede et al. [9]
4 FEM simulations with various source models
4.1 FEM Simulation
Number of polepairs | \(p\) | 2 |
Number of stator slots | \(N_{1}\) | 36 |
Machine diameter | \(d_{m}\) | \(149.9\,\text{m}\text{m}\) |
Axial length | \(l_{m}\) | \(70\,\text{m}\text{m}\) |
Rated speed | \(n_{r}\) | \(20\,000\,\text{min}^{-1}\) |
Rated torque | \(M_{r}\) | \(4.8\,\text{N}\text{m}\) |
Stall torque | \(M_{0}\) | \(21.2\,\text{N}\text{m}\) |
Stall current | \(I_{0}\) | \(70\,\text{A}\) |
Inverter switching frequency | \(f_{\text{pulse}}\) | \(64\,\text{k}\text{Hz}\) |