Finite element study of induced Emf, cogging torque and its reductions in BLDC motor

Hiremath, Ravikiran

doi:10.1109/icicict1.2017.8342821

Cited by 3 publications

(4 citation statements)

References 5 publications

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“…There is a cogging torque between the stator teeth and the permanent magnet of the rotor, which depends on the position of the rotor. Reducing the cogging torque is very important to improve the efficiency of electric motors [ 30 ], especially for the PM BLDC [ 31 ]. A detailed description of the cogging torque limitation methods can be found in the literature (e.g., References [ 32 , 33 , 34 , 35 ]).…”

Section: Resultsmentioning

confidence: 99%

Comparison of the Design of 3-Pole BLDC Actuators/Motors with a Rotor Based on a Single Permanent Magnet

Smółka

Firych‐Nowacka

2022

Sensors

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Permanent Magnet (PM) Brushless Direct Current (BLDC) actuators/motors have many advantages over conventional machines, including high efficiency, easy controllability over a wide range of operating speeds, etc. There are many prototypes for such motors; some of them have a very complicated construction, and this ensures their high efficiency. However, in the case of household appliances, the most important thing is simplicity, and, thus, the lowest price of the design and production. This article presents a comparison of computer models of different design solutions for a small PM BLDC motor that uses a rotor in the form of a single ferrite magnet. The analyses were performed by using the finite element method. This paper presents unique self-defined parts of basic PM BLDC actuators. With their help, various design solutions were compared with the PM BLDC motor used in household appliances. The authors proved that the reference device is the lightest one and has a lower cogging torque compared to other actuators, but also has a slightly lower driving torque.

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Section: Resultsmentioning

confidence: 99%

Comparison of the Design of 3-Pole BLDC Actuators/Motors with a Rotor Based on a Single Permanent Magnet

Smółka

Firych‐Nowacka

2022

Sensors

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“…This research used a BLDC IPM motor V-shape type for E-Boat propulsion. The motor selection is based on previous research, demonstrating its widespread use in electric vehicle applications due to its ease of maintenance, high power density, reliability, and efficiency [15][16][17] . Commercially, manufacturers and suppliers often opt for permanent magnet-assisted synchronous reluctance motors (PMaSynRM) or interior permanent magnet (IPM) motors for their electric traction motors, primarily due to their high efficiency and torque characteristics 18) .…”

Section: Bldc Motor Design and Requirementsmentioning

confidence: 99%

Design and Optimization of Brushless DC Motor for Electric Boat Thruster

Dewi Rianti Mandasari,

Yulianto,

Amelia

et al. 2023

Evergreen

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This research provided a detailed examination, which was used to develop a Brushless Direct Current (BLDC) motor for Indonesia's Electric Boat Conversion Program, specifically focusing on reducing cogging torque. Several approaches, including stator skewing, were examined while considering manufacturing complexities and costs. A novel methodology was used to determine the optimal skew angle, considering the limitations of allowable cogging torque, which was set at 10% of the rated torque based on prior research and the manufacturing process. The result showed that a skew angle of 6° outperformed empirical calculations at 15°. Mechanical evaluations also showed that the natural frequency remained within acceptable limits at the 6° skew angle. Therefore, a skew angle of 6° was recommended for the 10 kW BLDC motor used in electric boat applications. This research contributed to advancing motor design for electric boat conversions, effectively balancing performance optimization with manufacturing feasibility.

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“…In the literature, torque ripple due to the cogging couple in PMSMs is reduced, but not eliminated, by an appropriate magnetic and layout winding design, as proposed in [2,3]. The other typical approach is the reduction of the intensity of the magnetic interaction between the stator and the rotor by properly designing the machine according to different criteria and verified with finite element method (FEM) analysis tools, as discussed in [4,5]. The problem with the above approaches is that the modifications to the electrical motor are expensive because are customized, and furthermore, they do not guarantee a complete suppression of the torque ripple caused by the cogging phenomenon.…”

Section: Review Of State Of the Art For Cogging Torque Reductionmentioning

confidence: 99%

“…In this work, in the following Sections, a nonlinear control approach is presented as an alternative to all the previous methods. First of all, with respect to [2][3][4][5], the proposed approach has the advantage of keeping the same mechanical structure of the electric motor without adding the payload of customized structures.…”

Section: Review Of State Of the Art For Cogging Torque Reductionmentioning

confidence: 99%

Cogging Torque Reduction in Brushless Motors by a Nonlinear Control Technique

Dini

Saponara

2019

Energies

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This work addresses the problem of mitigating the effects of the cogging torque in permanent magnet synchronous motors, particularly brushless motors, which is a main issue in precision electric drive applications. In this work, a method for mitigating the effects of the cogging torque is proposed, based on the use of a nonlinear automatic control technique known as feedback linearization that is ideal for underactuated dynamic systems. The aim of this work is to present an alternative to classic solutions based on the physical modification of the electrical machine to try to suppress the natural interaction between the permanent magnets and the teeth of the stator slots. Such modifications of electric machines are often expensive because they require customized procedures, while the proposed method does not require any modification of the electric drive. With respect to other algorithmic-based solutions for cogging torque reduction, the proposed control technique is scalable to different motor parameters, deterministic, and robust, and hence easy to use and verify for safety-critical applications. As an application case example, the work reports the reduction of the oscillations for the angular position control of a permanent magnet synchronous motor vs. classic PI (proportional-integrative) cascaded control. Moreover, the proposed algorithm is suitable to be implemented in low-cost embedded control units.

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Finite element study of induced Emf, cogging torque and its reductions in BLDC motor

Cited by 3 publications

References 5 publications

Comparison of the Design of 3-Pole BLDC Actuators/Motors with a Rotor Based on a Single Permanent Magnet

Comparison of the Design of 3-Pole BLDC Actuators/Motors with a Rotor Based on a Single Permanent Magnet

Design and Optimization of Brushless DC Motor for Electric Boat Thruster

Cogging Torque Reduction in Brushless Motors by a Nonlinear Control Technique

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