Comparison of Performances of PMLSM Fed by Two Power Supplies
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| Title | Comparison of Performances of PMLSM Fed by Two Power Supplies |
| Authors | |
| Abstract | Inverters provided non-sinusoidal voltage or current, and the tooth-slot and winding distribution of the motor could lead to a mass of space harmonic components, severely deteriorating the motor performance. In order to know the cause of electromagnetic thrust and mover velocity fluctuation of low-velocity PMLSM fed by SPWM-VS, the steady-state performances of low-velocity PMLSM are analyzed in this paper. the performances of permanent magnet linear synchronous motor by sinusoidal pulse width module voltage source inverter (SPWM-VI-PMLSM) and sinusoidal voltage source inverter (S-VS) were researched used the field-circuit coupled adaptive time-stepping finite element method. The characteristic of having thick air gap is considered in the field-circuit 2D model. The co-simulation using state equation and time-step finite element equation is used, the time step of the state equation is smaller than that of the time-step finite element equation. PWM-VI-PMLSM and S-VS-PMLSM have the same current periodicity and similar current amplitude. The current of SPWM-VI-PMLSM has various harmonic components distorted as a result of magnetic saturation and non-sinusoidal air gap field. The tangential electromagnetic thrust of SPWM-VI-PMLSM under steady state oscillate with a period decided by pole pitch, and it has various harmonic components dampening thrust fluctuation, Thus S-VS-PMLSM has better performance than SPWM-VI-PMLSM. S-VS-PMLSM and SPWM-VI-PMLSM have the same periodicity of slip fluctuation, the slip value of SPWM-VI-PMLSM is larger than that of S-VS-PMLSM. The simulation results accords with experimental data. |
| Publisher | ACADEMY PUBLISHER |
| Date | 2013-03-01 |
| Source | Journal of Computers Vol 8, No 3 (2013): Special Issue: Parallel Computing |
| Rights | Copyright © ACADEMY PUBLISHER - All Rights Reserved.To request permission, please check out URL: http://www.academypublisher.com/copyrightpermission.html. |