Electromagnetic and Thermal Analysis/Design of an Induction Motor for Electric Vehicles

Ulu, Cenk; Korman, Oguz; Kömürgöz, Güven

doi:10.18178/ijmerr.7.6.617-623

Cited by 4 publications

(3 citation statements)

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“…Recently, as the performance of motors has increased, so has the power density. Consequently, the joule losses generated in the coil has increased, resulting in severe heat generation in the coil [6,7]. As the performance of motors continues to improve, this heat problem will become increasingly more serious, rendering effective motor cooling very important.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Behavior of Coolants, Particularly the Oil-Cooling Method, in Electric Vehicle Motors Using Hairpin Winding

Han

Kim

et al. 2021

Energies

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This paper analyzes the characteristics of oil behavior in the oil-cooling of motors with hairpin winding to understand how to maximize cooling performance. The oil cooling is performed by directly spraying oil onto the motor components. The results show that as the temperature of the oil increases, the viscosity decreases, and the oil film is formed more evenly; however, oil splashing also increases. Similarly, as the flow rate increases, oil splashing also increases, but the amount of oil forming the oil film increases. However, the oil film is not affected by the rotor’s rotation. In contrast, the immersed oil is found to be closely related to the rotor’s rotation. As the rotational speed increases, the immersion oil is mixed with the air, and oil churning occurs. The mixing phenomenon increases as the temperature and flow rate of the oil increases. The higher the oil level, the greater the oil churning. As the oil is mixed with air, the heat transfer coefficient decreases, which adversely affects the thermal management of the motor. As a result, when considering the oil film and the immersion oil, the optimal oil temperature, flow rate, and oil level are at 60 °C, 0.140 kg/s, and 85 mm, respectively. The results of this paper give important information about EV motor cooling and can contribute to the development of high-performance motors.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Behavior of Coolants, Particularly the Oil-Cooling Method, in Electric Vehicle Motors Using Hairpin Winding

Han

Kim

et al. 2021

Energies

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“…Sıvı soğutma tedbirine paralel olarak motor sürücüsü üzerinden sıcaklığa bağlı akım sınırlama yaygın olarak kullanılmaktadır. Asenkron motorlar ise basit yapıları, dayanıklılığı, düşük maliyetleri, hız kontrol tekniklerinin gelişmişliği ve SMSM'lere göre daha yüksek sıcaklıklarda çalışabilme kabiliyeti sebebiyle elektrikli araçlarda tahrik motoru tercih edilmektedir [5,11,12]. Asenkron motorlarda demagnetizasyon riskinin olmaması, stator sargılarının izolasyon sınırları dahilinde çok daha yüksek sıcaklıklarda sorunsuz çalışabilmelerine imkan sağlamaktadır.…”

Section: Introductionunclassified

Hafif Elektrikli Araçlar için Asenkron Motor Tasarımı ve Uygulaması

Ocak¹,

Yenipınar²

2021

European Journal of Science and Technology

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ÖzHafif elektrikli araçlarda kullanılacak asenkron tahrik motorlarının (ATM) hız, moment ve güç değerleri, kullanımının amaçlandığı bölgedeki sürüş çevrimine bağlı olarak kalkış ve fren yapma sayısı, hız limiti, ivme ihtiyacı, toplam araç ağırlığı gibi birçok parametreye bağlı olarak değişmektedir. Fakat endüstriyel tip sincap kafesli asenkron motorlar sürekli çalışma rejiminde ve anma şartlarında şebekeden çalışmaya uygun olarak tasarlanırlar ve elektrikli araçlar için kullanılacak asenkron tahrik motorlarından tasarım ve performans isterleri bakımından önemli ölçüde ayrışırlar. Bu çalışma, hafif elektrikli araçlarda kullanılmak üzere özelleştirilmiş, 48V DC batarya gerilimine sahip, 3,5kW gücünde ve S2-60dk çalışma rejiminde çalışabilecek bir ATM'nin tasarımını, sonlu eleman analizlerini (SEA), performans çıktılarını, prototip üretimi gerçekleştirilen motorun test sonuçlarını ve tasarım sonuçları ile karşılaştırmasını sunmaktadır. Çalışmada ihtiyaç duyulan motor özelliklerine yönelik temel boyutlandırma eşitlikleri, tasarlanan asenkron motorun fiziksel ölçüleri, stator ve rotor oluk ölçüleri, sarım özellikleri ve performans değerleri verilmiştir. Tasarımı gerçekleştirilen motor öncelikle SEA analizlerine tabi tutularak farklı çalışma koşullarındaki akı dağılımları ve akım yoğunlukları verilmiştir. Üretimi gerçekleştirilen prototip asenkron tahrik motoru sekiz farklı hız ve yük şartında test edilerek frekans, gerilim, akım, hız, moment, çıkış gücü, güç faktörü ve verim sonuçları tasarım sonuçları ile karşılaştırılmıştır. Benzer şekilde prototip motor farklı yük şartlarında ısı testlerine alınarak ısı artışı eğrileri elde edilmiş ve sunulmuştur. Test sonuçları ile tasarım sonuçları büyük oranda benzerlik göstermiş olup, tasarım sonuçları test sonuçları ile doğrulanmıştır.

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“…The synchronous motors and induction motors (IMs) are the main types of machines that can be utilised in EVs [9]. The EV‐drive motor should feature the following propulsion [7, 10–12]: (i) high torque density to give enough driving force during startup, climbing and acceleration; (ii) high efficiency to increase driving distance; (iii) good flow regulating ability to extend the static power speed range. The IM is more common to use for the traction drive and is the best candidate for EVs because of its strength, lower cost and low maintenance need [13–16], but its’ losses are significantly higher in the EV application [17, 18] and this leads to a drop in the machine efficiency. The most restrictive barriers to accepting such vehicles in the transport system are low energy density, heavier weight, longer charging times and longer battery life [19].…”

Section: Introductionmentioning

confidence: 99%

Power optimisation scheme of induction motor using FLC for electric vehicle

Kassem

Sayed

Kassem

et al. 2020

IET Electrical Systems in Transportation

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In electric vehicles (EVs) and hybrid EVs, energy efficiency is essential where the energy storage is limited. Adding to its high stability and low cost, the induction motor efficiency improves with loss minimisation. Also, it can consume more power than the actual need to perform its working when it is operating in less than full load condition. This study proposes a control strategy based on the fuzzy logic control (FLC) for EV applications. FLC controller can improve the starting current amplitude and saves more power. Through the MATLAB/SIMULINK software package, the performance of this control was verified through simulation. As compared with the conventional proportional integral derivative controller, the simulation schemes show good, high-performance results in time-domain response and rapid rejection of system-affected disturbance. Therefore, the core losses of the induction motor are greatly reduced, and in this way improves the efficiency of the driving system. Finally, the suggested control system is validated by the experimental results obtained in the authors' laboratory, which are in good agreement with the simulation results.

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Electromagnetic and Thermal Analysis/Design of an Induction Motor for Electric Vehicles

Cited by 4 publications

References 1 publication

Experimental Study on Behavior of Coolants, Particularly the Oil-Cooling Method, in Electric Vehicle Motors Using Hairpin Winding

Experimental Study on Behavior of Coolants, Particularly the Oil-Cooling Method, in Electric Vehicle Motors Using Hairpin Winding

Hafif Elektrikli Araçlar için Asenkron Motor Tasarımı ve Uygulaması

Power optimisation scheme of induction motor using FLC for electric vehicle

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