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Rotor configuration for improved working characteristics of LSPMSM in mining applications

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Category: Content №3 2024

Last Updated on 28 June 2024

Published on 30 November -0001

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Authors:

Do Nhu Y, orcid.org/0000-0001-6395-2875, Hanoi University of Mining and Geology, Hanoi, the Socialist Republic of Vietnam

Trinh Bien Thuy, orcid.org/0009-0006-2427-3515, Vietnam–Korea College of Quang Ninh, Ha Long, the Socialist Republic of Vietnam

Le Anh Tuan, orcid.org/0009-0001-8695-7457, Hanoi University of Industry, Hanoi, the Socialist Republic of Vietnam

Ngo Xuan Cuong*, orcid.org/0000-0002-0571-2168, School of Engineering and Technology, Hue University, Thua Thien Hue, the Socialist Republic of Vietnam

* Corresponding author e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

повний текст / full article

Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu. 2024, (3): 079 - 086

https://doi.org/10.33271/nvngu/2024-3/079

Abstract:

Purpose. Analysis of the rotor configuration of line start permanent magnet synchronous motor (LSPMSM) when using 3-bar magnet structure with two cases: one with a separating magnetic steel bridge and one without it. Research results allow selecting the appropriate rotor configuration to obtain the best starting characteristics, current, torque, and performance. Thereby, it is possible to replace high efficiency LSPMSM with low efficiency induction motors used in ventilation and water pumping loads to improve the efficiency of electricity use in mining.

Methodology. The article uses analytical methods and simulation methods on Ansys/Maxwell software and conducts a laboratory test evaluation to determine the effect of rotor configuration on the starting characteristics, working current, torque ripple, and working efficiency of an LSPMSM for mining applications.

Findings. An LSPMSM model was built based on a 15 kW–3,000 rpm induction motor with two rotor configurations: one with a separating magnetic steel bridge and one without it. The results of the study show that when a rotor configuration has no separating magnetic steel bridge, the LSPMSM reaches its maximum speed in 0.45 seconds, a synchronous speed of 3,000 rpm in around 0.75 seconds, a torque ripple of 23.1 %, a current total harmonic distortion of 14.3 %, and a performance of 93.3 %. In contrast, when a rotor structure has a separating magnetic steel bridge, starting the motor is more difficult, taking 1.14 seconds to reach synchronous speed and having a lower starting torque, a current total harmonic distortion of 16.1 %, and a performance of 92.5 %.

Originality. Research rotor configurations of LSPMSM based on the 15 kW–3,000 rpm induction motor with and without a separating magnetic steel bridge. The research results allow choosing the appropriate rotor configuration to obtain the best starting characteristics, current, operating torque and performance efficiency.

Practical value. The research results are important scientific guidance in the design and manufacture of LSPMSM for application in underground mining to improve the efficiency of electricity use in mining.

Keywords: finite element analysis, asynchronous motor, line start, permanent magnet, rotor configuration

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