Novel topology of unequal air gap in a single-phase brushless DC motor

Kwon, Byung-il; Yang, Byoung-Yull; Park, Seung-Chan; Jin, Young-Sun

doi:10.1109/20.952699

Cited by 38 publications

(4 citation statements)

References 6 publications

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“…When an asymmetric air-gap shape is applied, a phase difference occurs in the cogging torque, preventing the occurrence of zero-torque regions. Research has been conducted to propose various shapes for asymmetric air-gap and analyze their performance characteristics [18][19][20].…”

Section: The Asymmetric Air Gap Structure Of a Single-phase Bldc Motormentioning

confidence: 99%

Study on Single-Phase BLDC Motor Design through Drive IC Integration Analysis

Lee,

Jo,

Pyo

et al. 2023

Machines

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In this paper, a single-phase BLDC motor is applied to a cooling fan motor and a Drive IC integration analysis method of the single-phase BLDC motor is proposed. Single-phase BLDC motors have a simple structure, are easy to manufacture, and are low cost, so they are used in applications where low outputs and low costs are advantageous. Single-phase BLDC motors use a full-bridge inverter (Drive IC), and this inverter (Drive IC) has dead time due to switching. Therefore, in order to consider dead time when analyzing a single-phase BLDC motor, analysis through integration with Drive IC is necessary. This paper compares the types of single-phase BLDC motors, designs a model that satisfies target performance, and conducts research on Drive IC integration analysis through FEA. A prototype motor was manufactured and tested, and the validity of the Drive IC integration analysis was verified.

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Section: The Asymmetric Air Gap Structure Of a Single-phase Bldc Motormentioning

confidence: 99%

Study on Single-Phase BLDC Motor Design through Drive IC Integration Analysis

Lee,

Jo,

Pyo

et al. 2023

Machines

View full text Add to dashboard Cite

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“…Therefore, single motors adopt an asymmetric air-gap to make the [1] [2]. On the other hand, such an asymmetr contribute to the large cogging torque [3].…”

Section: Introductionmentioning

confidence: 99%

“…the stack height, m R is the inner radius of the rotor, s R is the inner radius of the stator and L N is the least common multiple of number of pole and number of slot, respectively.The final cogging torque can be represented using equation(3) by differentiating the air-gap energy obtained from equation(2) according to equation(1)with a rotation angle of the rotor.…”

mentioning

confidence: 99%

Cogging torque reduction of single-phase brushless DC motor with a tapered air-gap using optimizing notch size and position

Kim

Park

Cho

2014

2014 IEEE Energy Conversion Congress and Exposition (ECCE)

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This paper reports a stator shape optim for reducing the cogging torque of single-phase motor adopting an asymmetric air-gap to ma starting. Time step 2D-finite element analysis (FE out to analyze the characteristics of a single-phas motor. To reduce the cogging torque and maintai and torque, the Kriging model based on La sampling (LHS) and a genetic algorithm (GA) we optimal design result, the cogging torque on the was reduced. Finally, the analysis and optimal were confirmed by FEA and the experimental resu I.978-1-4799-5776-7/14/$31.00 ©2014 IEEE

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“…Therefore, single-phase BLDC motors adopt asymmetric airgaps to make them self starting [1][2][3]. On the other hand, such an asymmetric air-gap can contribute to cogging torque [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

A Novel Cogging Torque Reduction Method for Single-Phase Brushless DC Motor

Park¹,

Cho²,

Rhyu³

et al. 2013

Journal of Magnetics

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Single-phase, brushless DC (BLDC) motors have unequal air-gaps to eliminate the dead-point where the developed torque is zero. Unfortunately, these unequal air-gaps can deteriorate the motor characteristics in the cogging torque. This paper proposes a novel design for a single-phase BLDC motor with an asymmetric notch to solve this problem. In the design method, the asymmetric notches were placed on the stator pole face, which affects the change in permanent magnet shape or the residual flux density of the permanent magnet. Parametric analysis was performed to determine the optimal size and position of the asymmetric notch to reduce the cogging torque. Finite element analysis (FEA) was used to calculate the cogging torque. A more than 28% lower cogging torque compared to the initial model with no notch was achieved.

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Novel topology of unequal air gap in a single-phase brushless DC motor

Cited by 38 publications

References 6 publications

Study on Single-Phase BLDC Motor Design through Drive IC Integration Analysis

Study on Single-Phase BLDC Motor Design through Drive IC Integration Analysis

Cogging torque reduction of single-phase brushless DC motor with a tapered air-gap using optimizing notch size and position

A Novel Cogging Torque Reduction Method for Single-Phase Brushless DC Motor

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