The Effect of air gap on Electric Motor Performance: Copyright Material IEEE, Paper No. PCIC-2018-49

The application of an inverter is becoming more and more widespread in the surface-mounted permanent-magnet synchronous motor (SMPMSM). A large number of voltage harmonics can be generated by the inverter. The electromagnetic torque, loss, and air-gap magnetic density of the SMPMSM are affected by voltage harmonic. To analyze its influence, taking a 3 kW 1500 r/min SMPMSM as an example, a two-dimensional transient electromagnetic field model is established. The correctness of the model is verified by comparing the experimental data with the calculated data. Firstly, the finite element method is used to calculate the electromagnetic field of the SMPMSM, and the performance parameters of the SMPMSM are obtained. Based on these parameters, the influence of voltage harmonic on motor performance is analyzed quantitatively. Secondly, the influence of the voltage harmonic on the air-gap magnetic field is analyzed, and the influence degree of the time harmonic on the air-gap magnetic field is determined. At the same time, torque ripple, average torque, and loss are studied when the different harmonics orders, amplitudes, and phase angles are contained in voltage, and the variation is obtained. Finally, the variation mechanism of eddy current loss is revealed. The conclusion of this paper provides reliable theoretical guidance for improving motor performance.

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Effects of Structure Parameters on Performance of DSPM Motor

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.336-338.935 ◽

2013 ◽

Vol 336-338 ◽

pp. 935-939 ◽

Cited By ~ 1

Author(s):

Hua Liu ◽

Wei Jun Wang ◽

Long Bo Mao ◽

Qiang Dai

Keyword(s):

Motor Performance ◽

Torque Ripple ◽

Air Gap ◽

Dimensional Model ◽

Motor Design ◽

Doubly Salient ◽

Rotor Pole ◽

Design Software ◽

Overload Capacity ◽

External Rotor

A novel flux switching external rotor doubly salient permanent magnet (DSPM) motor was researched. The two-dimensional model of the motor was established by Ansoft motor design software and the effects of air gap length and rotor pole arc on motor performance were discussed. The simulation results show that larger or smaller air gap length and rotor pole arc improve the torque ripple rate, but the increase of air gap length is helpful to enhance the overload capacity. The conclusions of this article have positive significance for improving the motor performance.

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Rancang Bangun Modul Pembelajaran Bengkel Listrik (Designing Electric Workshop Learning Modules)

JEEE-U (Journal of Electrical and Electronic Engineering-UMSIDA) ◽

10.21070/jeee-u.v3i1.1924 ◽

2019 ◽

Vol 3 (1) ◽

pp. 1

Author(s):

Sonong Sonong ◽

Herman Nauwir ◽

Muhammad Ruswandi Djalal

Keyword(s):

Induction Motor ◽

Electric Motor ◽

Motor Performance ◽

Mechanical Energy ◽

Electrical Energy ◽

Electric Machine ◽

Protection System ◽

Electric Motors ◽

Learning Modules ◽

Motor Operation

Electric motor is an electric machine that has a function as a converter of electrical energy into mechanical energy. Electric motors are widely used as movers because they are better in terms of technical and economical, but have disadvantages such as large initial currents so that they cannot last long, to overcome this can be used Y-utan star starting method both manually and automatically created in a panel box. In the operation and manufacture of a protection system for a 3 phase induction motor, some supporting equipment can be arranged in a panel box so that motor performance can be maximized. The results of this tool design are in the form of a panel box in which there are three types of circuits, namely: 3 phase induction motor operation circuit with the starting Y-∆ automatically, reversing the direction of 3 phase induction motor rotation, and 3 phase induction motor operation in two places. Where the series is equipped with a protection system and can be operated manually and automatically.

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Critical value of electric motor air gap

Mechanik ◽

10.17814/mechanik.2015.11.524 ◽

2015 ◽

pp. 874-876

Author(s):

Waldemar Morzuch

Keyword(s):

Electric Motor ◽

Critical Value ◽

Air Gap

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Mechanical Impact on In-Wheel Motor's Performance

Journal of Mechanics ◽

10.1017/jmech.2016.95 ◽

2016 ◽

Vol 33 (5) ◽

pp. 607-618 ◽

Cited By ~ 1

Author(s):

M. Biček ◽

R. Kunc ◽

S. Zupan

Keyword(s):

Thermal Management ◽

Automotive Industry ◽

Motor Performance ◽

High Performance ◽

Mechanical Design ◽

Air Gap ◽

Electromagnetic Properties ◽

Promising Solution ◽

Relative Change ◽

The Impact

AbstractIn-wheel motors offer a promising solution for novel drivetrain architectures that could penetrate into the automotive industry by locating the drive where it is required, directly inside the wheels. As obtainable literature mainly deals with optimization of electromagnetic active parts, the mechanical design of electromagnetically passive parts that indirectly influence motor performance should also be reviewed and characterized for its effect on performance. The following study uniquely evaluates the impact of mechanical design and its dimensional variations to air-gap consistency between on rotor glued magnets and on stator fitted winding, for the most commonly used layout of an in-wheel motor. To meet the optimal performance of an in-wheel motor, the mechanical design requires optimization of housing elements, thermal management, geometrical and a dimensional tolerance check, and proper hub bearing selection to assure consistent electromagnetic properties. This article covers the correlation between desired electromagnetic parameters and required geometrical limitations for ensuring functionality and high performance operation. Major mechanical contributors have been analyzed with analytical calculations, numerical simulations, and verified with different sets of measurements. The relative change of motor physical air-gap size, between the stator and rotor was correlated with electromagnetic flux density.

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Case of Study of the Electrification of a Tractor: Electric Motor Performance Requirements and Design

Energies ◽

10.3390/en13092197 ◽

2020 ◽

Vol 13 (9) ◽

pp. 2197

Author(s):

Diego Troncon ◽

Luigi Alberti

Keyword(s):

Electric Motor ◽

Motor Performance ◽

New Technologies ◽

Operating Conditions ◽

Hybrid Powertrain ◽

Research Attention ◽

Working Cycle ◽

Performance Requirements ◽

Duty Cycles ◽

Agricultural Tractors

The focus of this paper is the potential electrification of specialized agricultural tractors involved in vineyards and orchards. This category of machinery has not received research attention to date; however, regulations are encouraging lower emissions and higher efficiency, requiring the adoption of new technologies. Traction makes up only a limited part of this application, and the working cycle is not trivial; therefore, the design of the system is not straightforward. This study takes advantage of experimental measurements carried out under real operating conditions on a traditional specialized tractor, which was chosen as performance target. The performance requirements of the hybrid powertrain components are investigated, with particular focus placed on the electric motor. According to the dimension constraints, the design of the electric motor is carried out considering the requirements in terms of its thermal-equivalent torque and overload capability. The results are validated through a detailed thermal simulation under real duty cycles.

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