Abstract
This paper deals with design of permanent magnet synchronous generators (PMSG) for diesel engine generators. The PMSG is required to reduce the total harmonic distortion (THD) reduction of the induced electromotive force (EMF) for the enhancement of power quality. In this paper, a design method is proposed to reduce the THD of the induced EMF for power quality enhancement in the PMSG. First, the selection process for the number of poles and slots is described. Second, the rotor shape design is proposed using an eccentric curve and slit shape. Based on the results of the first process, the optimal rotor shape is selected to achieve the additional THD reduction of the induced EMF. Finally, the performance for the optimal rotor shape is verified through a 2-dimensional finite element analysis (2D FEA) and prototype.
Highlights
This paper proposes a design method to reduce the induced electromotive force (EMF) total harmonic distortion (THD) at the load drive and increase the magnitude of induced EMF for power quality enhancement in permanent magnet synchronous generators (PMSG)
Eccentricity in the rotor is one of the general methods used for reducing the THD of the induced EMF and torque ripple [5
It is expected that manufacturing disturbances, such as tolerance errors of magnet magnetization and shape dimension in rotor and stator, were the cause of this
Summary
The reduction of iron loss is a key design factor in the IPM-type machine to improve efficiency at high speed, such as in electric vehicles (EVs) [10,11,12]. For this reason, it can be concluded that most previous research mainly focused on eccentricity to reduce the induced EMF THD and torque ripple. This paper proposes a design method to reduce the induced EMF THD at the load drive and increase the magnitude of induced EMF for power quality enhancement in PMSGs. First, the selection process of the number of poles and slots for the initial design is described. The performance for the final design is verified through 2D finite element analysis (FEA) and experimentation
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