Abstract
The Electrical Vehicle industry has developed rapidly in recent years, and the demand for new energy-driven motor systems has also increased. Permanent Magnet Synchronous Machine (PMSM) are high performance drive motors. In this paper, a new type of GO silicon steel material assembled stator core is proposed, compared with conventional Non Grain-Oriented (NGO) silicon steel stator, and the magnetic properties of the motor are analyzed. The method of assembling the stator core is given, in which the GO silicon steel sheets are stacked as the teeth of the stator core. GO silicon steel has low iron loss and large saturation magnetic density, which is more conducive to improving motor efficiency. The teeth of the stator core tend to have higher magnetic density and are more prone to sustain a higher iron loss. This research ensures the reliability of the test results through simulation analysis and physical test verification.
Highlights
This paper presents numerical modeling and experimental measurement of core loss and thermodynamic characteristics of an iron core in Permanent Magnet Synchronous Machine (PMSM) at various frequencies among 50Hz, 100Hz, 400Hz and 1000Hz.At first, differences of GO and Non Grain-Oriented (NGO) material will be described and metallographic experiment results are given
Cold-rolled silicon steel sheets are divided into NGO silicon steel and GO silicon steel: GO silicon steel is further divided into general GO silicon steel and high magnetic induction GO silicon steel, namely HiB steel
This paper described the feasibility of replacing a conventional iron core made of NGO silicon steel with teeth made of GO silicon steel in a 12 slots, 8 poles motor
Summary
This paper presents numerical modeling and experimental measurement of core loss and thermodynamic characteristics of an iron core in PMSM at various frequencies among 50Hz, 100Hz, 400Hz and 1000Hz. At first, differences of GO and NGO material will be described and metallographic experiment results are given. Power losses of NGO and its high-frequency iron core losses at 50Hz, 100Hz, 400Hz and 1000Hz are measured. It is clarified that the numerical model and experimental iron core losses in each experiment are showed to be in good agreement. The numerical model for iron core losses and experimental results for single electrical steel sheet are especially useful to estimate power losses of electric machines running at higher frequency of 1000Hz 2000Hz. For different frequencies, the distribution of the thermodynamic model can be described by the iron core and the whole machine. The final section presents our conclusion of the experiments and prototype’s performance
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