Torque Analysis and Dynamic Performance Improvement of a PMSM for EVs by Skew Angle Optimization

Shi, Zhou; Sun, Xiaodong; Cai, Yingfeng; Yang, Zebin; Lei, Gang; Guo, Youguang; Zhu, Jun

doi:10.1109/tasc.2018.2882419

Cited by 108 publications

(59 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the auxiliary teeth structure, the amplitude and the THD of the back-EMF are all reduced. Besides, the THD of back-EMFs can be further reduced by skewing stator slots [17], [18].…”

Section: A Back-emfmentioning

confidence: 99%

Auxiliary teeth design to reduce short-circuit current in permanent magnet generators

Zhao

Tang³

et al. 2020

Trans. Electr. Mach. Syst.

View full text Add to dashboard Cite

In this paper, a new auxiliary teeth structure is proposed for fault-tolerant permanent magnet (PM) generators, which can reduce the short-circuit currents. Firstly, the short-circuit current and the phase to phase isolation of the fault-tolerant generator are analyzed briefly. Secondly, the auxiliary teeth structure is optimized to improve fault-tolerant capability. Then, the PM generators with different stator structures are compared to evaluate the proposed auxiliary teeth structure. Four critical generator parameters are investigated, i.e. back-electromotive forces, short-circuit currents, stator magneto motive force (MMF) harmonics, and torque performances. The results show that the proposed structure has better fault-tolerant capability than the conventional two-layer windings. Moreover, the stator MMF harmonics can be suppressed. Furthermore, the cogging torque and torque ripple can be suppressed by adopting the proposed structure. Finally, the simulated results are given to validate the theoretical analysis. Index Terms-Auxiliary teeth, fault-tolerant generator, magneto motive force, torque, finite-element method, permanent magnet generator.

show abstract

“…With the auxiliary teeth structure, the amplitude and the THD of the back-EMF are all reduced. Besides, the THD of back-EMFs can be further reduced by skewing stator slots [17], [18].…”

Section: A Back-emfmentioning

confidence: 99%

Auxiliary teeth design to reduce short-circuit current in permanent magnet generators

Zhao

Tang³

et al. 2020

Trans. Electr. Mach. Syst.

View full text Add to dashboard Cite

show abstract

“…Multi-phase armature windings have been studied in the field of permanent magnet (PM) machines for better integration with power converters [15]- [21]. In the context of HTS generators, especially for the purpose of reducing the mechanical air gap, multi-phase armature windings have not been investigated yet.…”

Section: Introductionmentioning

confidence: 99%

Investigation Into Multi-Phase Armature Windings for High-Temperature Superconducting Wind Turbine Generators

Liu

Song

Deng

et al. 2020

IEEE Trans. Appl. Supercond.

View full text Add to dashboard Cite

High-temperature superconducting (HTS) generators are being considered as a competitive candidate in large direct-drive (DD) wind turbines because of their features of being lightweight and compact. Normally a large air gap is inevitable in partially HTS generators, sacrificing the torque producing capability. In this paper, multi-phase armature windings for HTS generators are investigated to reduce the air gap length in HTS generators while not compromising generators' performance. Therefore, the torque density of HTS generators can be improved without any added costs. Five different multi-phase armature winding schemes are studied in the paper. Their performance regarding torque production and rotor losses in a 10 MW DD HTS generator are examined. The findings show that employing multi-phase armature windings can reduce the mechanical air gap without generating extra eddy current losses in the rotor, and the torque production can be improved by up to 9.1%. In addition, the alternating magnetic field reaching the HTS field winding are also reduced by using multi-phase armature windings, resulting in lower AC losses and cooling costs.

show abstract

“…Permanent magnet synchronous machines (PMSMs) are widely used in electric vehicles [1], [2], renewable energy generation, flywheel energy storage systems [3], [4], industrial drive systems and so on. Large PMSMs have broad application prospects in wind turbine generators, electric shipboard propulsion motors, mining equipment motors, etc.…”

Section: Introductionmentioning

confidence: 99%

Research on the Airflow and Thermal Performance in a Large Forced Air-Cooled Permanent Magnet Synchronous Machine

Tong

Tang

2019

IEEE Access

View full text Add to dashboard Cite

In this paper, the airflow and temperature distribution characteristics of a 1.65MW permanent magnet synchronous machine (PMSM) adopting a totally enclosed self-circulation (TESC) axial ventilation system (AVS) are studied by numerical methods. Base on the 3-D finite volume method, the ventilation performances of the PMSM with different ventilation hole numbers on the frame and stator axial ventilation duct heights are compared to determine the optimal ventilation hole number and stator axial ventilation duct height. Then, based on the 3-D finite element method (FEM), the thermal sensitivity analysis is performed by considering the variations of the mesh and thermal conductivity of the winding insulation, and the mesh and size of the assembling clearance. The results can be benefit for identifying the most important factors affecting the accuracy of 3-D FEM thermal calculation of PMSMs. The temperature distribution of the 1.65MW PMSM with the TESC AVS is obtained in the conditions of the optimal ventilation system. At last, a 1.65MW PMSM prototype with the presented TESC AVS is developed according to the airflow and temperature calculation results, and the temperature rise test performed on the prototype validates the accuracy of the simulation results.

show abstract

Torque Analysis and Dynamic Performance Improvement of a PMSM for EVs by Skew Angle Optimization

Cited by 108 publications

References 16 publications

Auxiliary teeth design to reduce short-circuit current in permanent magnet generators

Auxiliary teeth design to reduce short-circuit current in permanent magnet generators

Investigation Into Multi-Phase Armature Windings for High-Temperature Superconducting Wind Turbine Generators

Research on the Airflow and Thermal Performance in a Large Forced Air-Cooled Permanent Magnet Synchronous Machine

Contact Info

Product

Resources

About