Harmonic Analysis on Torque Ripple of Brushless DC Motor Based on Advanced Commutation Control

Ji, Yuanchao; Li, Bin; Sun, Jun

doi:10.1155/2018/3530127

Cited by 9 publications

(5 citation statements)

References 23 publications

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“…Because of this effect, the current changes quickly during commutation in BLDC motors. Nevertheless, inductances are present in the motor's windings, and when current is commutated from one phase to another, a transient process occurs, resulting in electromagnetic torque fluctuations known as commutation torque ripple (CTR) [60][61][62]. The CTR effect reduces efficiency due to iron and copper losses, while accurate phase current control weakens during phase current commutation periods.…”

Section: ) Current Commutationmentioning

confidence: 99%

Critical Review on Torque Ripple Sources and Mitigation Control Strategies of BLDC Motors in Electric Vehicle Applications

Prabhu,

Thirumalaivasan,

Ashok

2023

IEEE Access

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In recent years, electric vehicles (EVs) have attracted a lot of attention and are rapidly growing trends today due to their ability to compete with and overtake fossil fuel-powered vehicles among all electrified transportation tools. The primary focus of EV evolution is on improving driving range and optimizing energy consumption, both of which are essential demands achieved through improved and developing motor performance. The brushless direct current (BLDC) motor is one of the most superior choices for dynamic applications in EVs, providing the highest power density and capability of any motor. BLDCs are gaining popularity in EVs not only for their high performance in speed and position controls but also for meeting the requirements of smooth torque maintenance with torque ripple mitigation. This paper provides an overview of various advanced control strategies, such as field-oriented control (FOC), direct torque control (DTC), intelligent control (IC), controlling input voltage (CIV), current shaping techniques (CST), model predictive control (MPC), and sliding mode control (SMC). These strategies are used to regulate the torque ripples produced in BLDC motors, aiming to achieve energy-efficient EV performance for various applications. Additionally, it describes a cloud-based control system coupled with electric motor drives to address challenges in predicting current vehicle conditions for improved power distribution between the motor and battery systems. Furthermore, recent concerns and difficulties in advancing torque ripple mitigation control strategies are highlighted, with comparisons and discussions for future EV research. Finally, an evaluative study on BLDC motor drive in EVs with different control strategies reveals its significance and potential outcomes. INDEX TERMS Brushless Direct Current (BLDC) motor, Cloud based torque control, Control structural architecture, Electric Vehicles (EVs), Various control strategies for torque ripple mitigation.

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Section: ) Current Commutationmentioning

confidence: 99%

Critical Review on Torque Ripple Sources and Mitigation Control Strategies of BLDC Motors in Electric Vehicle Applications

Prabhu,

Thirumalaivasan,

Ashok

2023

IEEE Access

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“…por principal consequência a presença de um ripple de torque na máquina. Sendo assim, a FCEM pode ser decomposta pela seguinte soma de senos (Ji et al, 2018;Rang et al, 2011) e a (t) = E 1 sin(ω e t) + E 3 sin(3ω e t) + E 5 sin(5ω e t) + . .…”

Section: Conteúdo Harmônico Presente Na Fcem E Nas Correntes Da Máquinaunclassified

“…De acordo com (9), a corrente estatórica da máquina depende diretamente da tensão aplicada no terminal da mesma, das forças contra-eletromotrizes e da resistência e indutância do estator. Considerando que as tensões v abc (t) são senoidais, pode-se reescrever as correntes da seguinte forma (Ji et al, 2018;Rang et al, 2011) i a (t) = I 1 sin(ω e t − ϕ 1 ) + I 5 sin(5ω e t − ϕ 5 ) + + I 7 sin(7ω e t − ϕ 7 ) + . .…”

Section: Conteúdo Harmônico Presente Na Fcem E Nas Correntes Da Máquinaunclassified

Aplicação de Inversores Multiníveis para Redução do Conteúdo Harmônico das Correntes de uma Máquina PMSM N˜ao-Senoidal

Rocha

Borin

Rech

et al. 2022

Proceedings IX Simpósio Brasileiro De Sistemas Elétricos

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This work presents the use of multilevel inverters in a non-sinusoidal permanent magnet synchronous machine to reduce the harmonic content in the currents. Due to the construction of this machine, the back electromotive force presents a non-sinusoidal characteristic, which has as main consequence the presence of ripple in the electromagnetic torque produced by the machine. Such oscillations decrease the efficiency of the machine, and can cause vibrations in the motor shaft, reducing its useful life. To mitigate this, this work uses multilevel inverters with flying capacitors to synthesize voltages with 3, 5, 7 and 9 levels, in order to reduce the harmonic content of the stator currents, and consequently the machine torque. Qualitative analyzes are presented through the total harmonic distortion and ripple in the machine currents, and the weighted total harmonic distortion of the inverter output voltages, comparing the performance of multilevel inverters with a half-bridge inverter of 2 levels. Resumo: Este trabalho apresenta o uso de inversores multiníveis em uma máquina síncrona de ímãs permanentes não-senoidais para a redução do conteúdo harmônico nas correntes. Devido à construção dessa máquina, suas forças contra-eletromotrizes apresentam uma característica não-senoidal, o que tem como principal consequência a presença de oscilações no torque eletromagnético produzido pela máquina. Tais oscilações diminuem a eficiência da máquina, e podem acarretar em vibrações no eixo do motor, diminuindo sua vida útil. Para mitigar isso, este trabalho utiliza inversores multiníveis com capacitores flutuantes para sintetizar tensões com 3, 5, 7 e 9 níveis, visando reduzir o conteúdo harmônico das correntes estatóricas, e por consequência no torque da máquina. Análises qualitativas são apresentadas por meio da distorção harmônica total e do oscilações nas correntes da máquina, e da distorção harmônica total ponderada das tensões de saída do inversor, comparando o desempenho dos inversores multiníveis com um inversor em meia ponte de 2 níveis.

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“…e step size and torque ripples in reluctance machine are influenced by rotor magnetic poles. Presence of large number of poles results in smaller step size as well as lower torque ripple [24][25][26]. Various analytical methods have been proposed to minimize the cogging torque [27,28].…”

Section: Related Workmentioning

confidence: 99%

Analysis of the Impact of Magnetic Materials on Cogging Torque in Brushless DC Motor

Karthick¹,

Ravivarman²,

Samikannu

et al. 2021

Advances in Materials Science and Engineering

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The cogging torque is the most significant issue in permanent magnet applications, since it has a negative impact on machine performance. In this article, the impact of magnetic materials on cogging torque is analyzed on brushless DC motors (BLDC). The effect of neodymium magnets (NdFeB), compression molded magnet, and samarium cobalt (SmCo) magnet on the cogging torque is analyzed to the BLDC motor designed for hybrid electric vehicle traction that has the peak power rating of 50 kW motor with 48 stator slots and 8 rotor poles. With the presence of these three magnetic materials, the cogging torque is estimated independently using multiposition simulation. The multiposition is simulated using a transient application that runs at constant speed. The results of cogging torque, rotational speed, angular position of BLDC motor, and magnetic flux density distribution have been presented. Also, the maximal, mean, minimal, rectified mean, and rms values of cogging torque were provided.

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Harmonic Analysis on Torque Ripple of Brushless DC Motor Based on Advanced Commutation Control

Cited by 9 publications

References 23 publications

Critical Review on Torque Ripple Sources and Mitigation Control Strategies of BLDC Motors in Electric Vehicle Applications

Critical Review on Torque Ripple Sources and Mitigation Control Strategies of BLDC Motors in Electric Vehicle Applications

Aplicação de Inversores Multiníveis para Redução do Conteúdo Harmônico das Correntes de uma Máquina PMSM N˜ao-Senoidal

Analysis of the Impact of Magnetic Materials on Cogging Torque in Brushless DC Motor

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