“…They are more expensive than IMs but less than PM machines. Reliability of SRMs is comparable to or even slightly better than IMs and is better than the PM machines, but SRMs are behind IMs and PM machines regarding controllability [50]. However, with the limitation of resources and fluctuation in the PM prices, there is a strong interest in advancing the SRM for PEVs.…”
“…The SRM is used in only a few prototypes of PEVs, as shown in Table 2. All the above listed problems should be solved before PEV mass-production [9,27,28,50].…”
“…Electric-magnetic load, switching-frequency, losses, harmonic current, and flux distribution play important roles in traction motor design. PEV traction motors have the following special requirements that set them apart from conventional EMs [9][10][11][12][13]50,51]:…”
Section: Technological Investigation and Comparison Of The Ems In Usementioning
“…They are more expensive than IMs but less than PM machines. Reliability of SRMs is comparable to or even slightly better than IMs and is better than the PM machines, but SRMs are behind IMs and PM machines regarding controllability [50]. However, with the limitation of resources and fluctuation in the PM prices, there is a strong interest in advancing the SRM for PEVs.…”
“…The SRM is used in only a few prototypes of PEVs, as shown in Table 2. All the above listed problems should be solved before PEV mass-production [9,27,28,50].…”
“…Electric-magnetic load, switching-frequency, losses, harmonic current, and flux distribution play important roles in traction motor design. PEV traction motors have the following special requirements that set them apart from conventional EMs [9][10][11][12][13]50,51]:…”
Section: Technological Investigation and Comparison Of The Ems In Usementioning
“…Air pollution, global warming and depletion of the World's petroleum resources are led to an increased interest for clean and efficient vehicles, such as Electric vehicles (EVs) [1]. As the main component of EVs, electric machine designed for EVs needs to have the characteristics such as high torque density, high efficiency and low cost [2][3][4].…”
In this paper, two kinds of torque ripple optimization methods are proposed for Switched Reluctance Motors due to the mutual coupling between phases. When phase number of SRM is more than two, SRM is often running in status of two phases excited simultaneously, then mutual inductance will be occurred between phases. The mutual coupling will affect the current waveform, thereby affecting the torque. This paper take a six phase 12/10 SRM as an example, four kinds of arrangements of stator magnetic polarity based on the two kinds of winding connections is given and the asymmetry of the magnetic distribution in the four modes is described. For NNSS arrangements of stator magnetic polarity, the phenomenon of asymmetry currents and the resulting torque ripple is analyzed using finite method.Based on the analysis of mutual inductance, the limitations of stator and rotor poles arc is given and an asymmetric control strategy is proposed to reduce the torque ripple.The simulation shows that the average torque is increased and the torque ripple is reduced.
“…[1]- [3] Further, SRM can still keep running smoothly in the lack of phase. For these reasons, a wide range of applications has been demonstrated in many fields, for instance, oil field, mine, textile machinery and electric vehicle.…”
Conventional switched reluctance motor (SRM) already has the relatively complete structure design method. The classical design method (CDM) of combining structure parameters calculation and finite element motor optimization design method (FEMODM) is the most widely used for conventional. But FEMODM need to adjust structure parameters, which generally have only a restricted range of values. That leads to a huge workload, and random selection. To solve this problem, the paper proposed a new design method using orthogonal experimental design method (OEDM). The advantages of the new design method include celerity, simplicity and accuracy. Based on the new design method, a 12/12 SRG with C-shaped stators and extern rotor was designed and simulated. The results show that the new design method is feasible and suitable for such kind of motors.
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