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This paper investigates the influence of the magnetic saturation on the transient performance of Synchronous Reluctance Motors (SynRMs). In addition, the stability limits for the SynRM are studied using a more accurate model. The saturation, cross-saturation and position effects on both direct (d) and quadrature (q) axis flux linkages are considered. A Finite Element Method (FEM) is used to obtain...
Infinite numbers of virtual permanent magnet (PM) blocks can be used to represent the segmented magnets per magnet pole in any combination of slot and pole numbers of the semi-closed surface-mounted permanent magnet synchronous machines (PMSMs). This concept is exploited and developed in the two-dimensional (2D) analytical subdomain model to predict the motor performances. The model is able to facilitate...
The thrust ripple of Permanent Magnet Linear Synchronous Motor (PMLSM) at load can reach 10% average thrust, which deteriorates thrust performance. To reduce the thrust ripple, two methods of optimizing the primary length and skewing are widely adopted during PMLSM design. In this paper, the effect of skewing technology is investigated. Based on 2D finite element method (FEM), the characteristics...
In this paper, the main objective is to develop a fast analytical model to be used in optimization process or coupled with other fast analytical models. A reluctance network of DC series machine is developed and shows its accuracy and robustness thanks to the consideration of the armature magnetic reaction (AMR) which is an important phenomenon in high saturated DC motors. This model is validated...
This paper presents an investigation of 20% difference between the measured and calculated slip torque of a Motor Integrated Permanent Magnet Gear (MIPMG) prototype. The High Speed (HS) side of the Magnetic Gear (MG) was fixed by loading the motor when conducting the slip torque measurement. Suspicion of the motor saturating before the MG reached peek torque and thus measuring the maximum torque of...
In this work a design optimization of the high-speed buried-type interior permanent magnet bearingless motor with significant power for such machines is presented. The geometry, windings arrangement and magnets are adjusted from the non-levitated motor design to avoid the significant magnetic saturation and achieve the performance target without oversizing the machine. The analytical design is optimized...
An analytical model of an induction machine to calculate the radial magnetic flux density in the air-gap is proposed. A transient model is required to get reliable results if influences of inverter, sensor systems, control strategies and fault cases are considered. This paper indicates the process to compute the transient electromagnetic behavior of three-phase cage induction machines using a MATLAB...
A simple initial rotor position identification method is proposed for surface-mounted permanent magnet synchronous machines (SPMSMs) in this paper. The magnetic saturation of iron core is taken into account and the saturated d-axis current is generated by injecting voltage vector pulses. The space vector pulse width modulation (SVPWM) is used to acquire the voltage vector pulses and an assumed rotor...
This paper proposes a suitable control method for permanent magnet synchronous motors (PMSMs) traction system in high speed train under passing neutral section condition, which drops torque command to zero and keeps d-axis current order. Its influences on the traction system are simulated and compared based on a co-simulation model. This model combines control strategy and finite element model (FEM)...
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