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Electronics
Special Issues
Analysis and Optimal Design Method for Electric Machine and Devices
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Analysis and Optimal Design Method for Electric Machine and Devices

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: closed (10 October 2020) | Viewed by 12101

Special Issue Editor

Prof. Dr. Jong-Suk Ro

E-Mail Website
Guest Editor
Electrical Energy Application Lab, Chung-Ang University, Seoul, Republic of Korea
Interests: electric energy application; next-generation electric machine using smart materials (electromagnetism, piezoelectricity, etc.); optimization algorithm; artificial intelligence
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The aim of this Special Issue is to seek high-quality articles on the following topics:

  • An effective analysis and design method is useful to reduce the development time and cost of electric machine and device. Hence, we call for excellent manuscripts on research toward an effective analysis and optimal design method for electric machines and devices using a numerical method or an analytic method to significantly reduce time and cost for the development of diverse kinds of machines.
  • The optimal design for the reduction of the development time and cost of a machine includes finding the optimal point of the objective function. However, the objective function is an unknown black box problem, and it is important to find the reliable optimal point efficiently. Hence, we invite you to submit high-quality manuscripts on the development of a novel optimization algorithm or an optimal design method using the optimization algorithm to enhance the efficiency and reliability of optimization of electric machines and devices.

Prof. Dr. Jong-Suk Ro
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Electronics is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Analysis and design method
  • Electric machine and device (actuator, motor, generator, transformer, others)
  • Material modeling (composite materials, hysteresis and anisotropy, magnetostrictive materials, permanent magnets, piezoelectric materials, shape memory alloy, superconducting materials, thermoelectric materials, others)
  • Mathematical modeling and formulations
  • Multiphysics and coupled problems (electromagnetic field problems, fluid problems, mechanical problems, thermal problems, others)
  • Numerical techniques
  • Optimization algorithm (deterministic algorithm, hybrid algorithm, special optimization algorithm, stochastic algorithm, others)
  • Optimization and design

Published Papers (4 papers)

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Research

20 pages, 1732 KiB  
Article
Electric Field Evaluation Using the Finite Element Method and Proxy Models for the Design of Stator Slots in a Permanent Magnet Synchronous Motor
by Stéfano Frizzo Stefenon, Laio Oriel Seman, Clodoaldo Schutel Furtado Neto, Ademir Nied, Darlan Mateus Seganfredo, Felipe Garcia da Luz, Pablo Henrique Sabino, José Torreblanca González and Valderi Reis Quietinho Leithardt
Electronics 2020, 9(11), 1975; https://doi.org/10.3390/electronics9111975 - 22 Nov 2020
Cited by 23 | Viewed by 2770
Abstract
The efficiency of electric motors is being improved every day and projects with design variations can improve their performance. Among electric motors, the Permanent Magnet Synchronous Machine (PMSM) is being increasingly used, because of its growing use in electric vehicles. Simulating design variations [...] Read more.
The efficiency of electric motors is being improved every day and projects with design variations can improve their performance. Among electric motors, the Permanent Magnet Synchronous Machine (PMSM) is being increasingly used, because of its growing use in electric vehicles. Simulating design variations using the Finite Element Method (FEM) can improve PMSM design, and by optimizing the parameters based on the FEM, even better results can be achieved. The design of the PMSM stator slots must be evaluated, as conductors are accommodated and an electrical potential is applied at this location. The FEM parameters are varied, and the results can be used to build an approximate model, known as a proxy model. The proxy model can then be used in a mathematical programming problem to optimize the design of stators that have less electric field in certain regions, thus reducing the chance of developing a failure. The results of the proposed methodology show that its application is promising for machine design and can also be used for the design of other systems. Full article
(This article belongs to the Special Issue Analysis and Optimal Design Method for Electric Machine and Devices)
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14 pages, 5303 KiB  
Article
Detection of Self-Healing Discharge in Metallized Film Capacitors Using an Ultrasonic Method
by Yusheng Ma, Haitao Shen, Chunming Pei, Huanyu Zhang, Muhammad Junaid and Yuxing Wang
Electronics 2020, 9(11), 1893; https://doi.org/10.3390/electronics9111893 - 11 Nov 2020
Cited by 4 | Viewed by 2176
Abstract
Benefiting from self-healing features, metallized film capacitors (MFCs) are widely employed to compensate reactive power (VAR) and thus improve the performance of AC systems. To ensure the aforementioned functions, self-healing testing is a compulsory quality inspection for every type of MFC. In 2014, [...] Read more.
Benefiting from self-healing features, metallized film capacitors (MFCs) are widely employed to compensate reactive power (VAR) and thus improve the performance of AC systems. To ensure the aforementioned functions, self-healing testing is a compulsory quality inspection for every type of MFC. In 2014, the International Electrotechnical Commission (IEC) issued a standard that recommended a general and instructive test procedure based on audible noise or ultrasound signals. However, more details relevant to this high voltage (HV) test were not provided. In this paper, we focused on the ultrasonic detection technique to reveal the self-healing characteristics of two typical MFCs. By launching a series of HV tests with star and delta MFCs, the waveform features, discharge energy, and spectrum distributions were analyzed. It was observed that the partial discharge always occurs before self-healing discharge with the same spectrum features ranging above 40 kHz. To solve the entanglement of these two discharge processes, a relative amplitude difference method is proposed. Based on the experimental observations, a detection algorithm incorporated with the ultrasonic emission sensors, preamplifier, and high-speed A/D converter was developed to assist the self-healing performance test. Full article
(This article belongs to the Special Issue Analysis and Optimal Design Method for Electric Machine and Devices)
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17 pages, 3647 KiB  
Article
Impact of Tolerances on the Cogging Torque of Tooth-Coil-Winding PMSMs with Modular Stator Core by Means of Efficient Superposition Technique
by Carlos Madariaga, Werner Jara, Danilo Riquelme, Gerd Bramerdorfer, Juan A. Tapia and Javier Riedemann
Electronics 2020, 9(10), 1594; https://doi.org/10.3390/electronics9101594 - 29 Sep 2020
Cited by 14 | Viewed by 2604
Abstract
This paper analyzes the impact of manufacturing tolerances on the cogging torque of a 24-slot 28-pole tooth-coil-winding permanent magnet synchronous machine with a modular stator core (TCW-MPMSM). Dimensional tolerances and asymmetries associated with the modular topology are studied by means of finite element [...] Read more.
This paper analyzes the impact of manufacturing tolerances on the cogging torque of a 24-slot 28-pole tooth-coil-winding permanent magnet synchronous machine with a modular stator core (TCW-MPMSM). Dimensional tolerances and asymmetries associated with the modular topology are studied by means of finite element simulations in order to identify key parameters that increase the cogging torque above the expected values of a faultless machine. Among five selected dimensional parameters, it was found that angular displacement, radial displacement, and tooth–tip width deviations of the stator segments have the most significant impact on the cogging torque. Considering these three key parameters, a full-range tolerance analysis is carried out by means of a proposed superposition-based approach, evaluating all possible combinations of typical deviation values. It is concluded that the cogging torque increment, generated by tolerances, is relatively independent of the faultless tooth–tip width of the stator segments and the arc-to-pole ratio. Robustness of the TCW-MPMSM, regarding cogging torque generation, depends on both the tightness of the tolerances handled in the manufacturing process and the rated cogging torque: the lower the cogging torque of the ideal machine, the less robust is the machine and, therefore, manufacturing imperfections will be required to be tightened. Full article
(This article belongs to the Special Issue Analysis and Optimal Design Method for Electric Machine and Devices)
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12 pages, 3712 KiB  
Article
Efficient Estimator of Rotor Temperature Designing for Electric and Hybrid Powertrain Platform
by Tuan-Vu Tran and Edouard Nègre
Electronics 2020, 9(7), 1096; https://doi.org/10.3390/electronics9071096 - 04 Jul 2020
Cited by 6 | Viewed by 3934
Abstract
This paper presents an efficient method of estimation of rotor cage temperature for induction machine design, applied for electric and hybrid vehicles. This factor influences the torque produced by the induction machine with a field-oriented control algorithm. Equipping sensors to measure the temperature [...] Read more.
This paper presents an efficient method of estimation of rotor cage temperature for induction machine design, applied for electric and hybrid vehicles. This factor influences the torque produced by the induction machine with a field-oriented control algorithm. Equipping sensors to measure the temperature of a rotation component is expensive and is not representative of mass production. The approach of estimation of rotor cage temperature is based on the good knowledge of motor parameters and the estimation of the flux of the machine. For an accuracy inductance taking account of the saturation, the no-load test can be performed. The machine flux will be estimated taking account of the voltage drop of the system on the test-bench. The rapid prototyping in a real-time motor control platform will be presented that integrates this estimator of rotor temperature. We finally show the experimental testing results compared to the measurement of the rotor cage on a prototype asynchronous low-cost motor designing for battery electric city cars. Full article
(This article belongs to the Special Issue Analysis and Optimal Design Method for Electric Machine and Devices)
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