Optimal design of motor shape and magnetisation direction to obtain vibration reduction and average torque improvement in IPM BLDC motor

Kim, Hong-Seok; Kwon, Byung-il

doi:10.1049/iet-epa.2016.0618

Cited by 41 publications

(15 citation statements)

References 14 publications

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“…After substituting (9) and (13) into (16), it is given that (see (17) and (18)) Equation (17) will be non-zero only when k r = k p ′ ∪ k c ′. Therefore (see (18)) From (18), it is shown that aside from main torque produced by air-gap fundamental flux densities of p p and p c pole pairs, additional ripple torques produced by air-gap space harmonics also exist.…”

Section: Torque Ripple Analysismentioning

confidence: 99%

Reduction of torque ripple in a wound‐rotor brushless doubly‐fed machine by using the tooth notching

Wang

Xiong

et al. 2018

IET Electric Power Applications

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The torque ripple is a main source of the noise and vibration which has a considerable effect on the performance of the machine. A design technique, tooth notching, which was extensively used in permanent magnet machines, has been innovatively applied to a wound-rotor brushless doubly-fed machine (BDFM) to reduce the torque ripple. First of all, the winding structure, the winding space harmonics and magnetic fields of the stator and the rotor were studied. Then, general analytical expressions of the electromagnetic torque (EMT) for the BDFM were deduced. Finally, prediction of the results was verified by several models which were calculated by the finite-element analysis method, meanwhile, the influences of different toothnotching structures and the notch depth on the EMT were investigated. It is shown that the torque ripple can be reduced by the suggested design with small increment of the magnetic field saturation and the currents of the control winding and the rotor winding.

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Section: Torque Ripple Analysismentioning

confidence: 99%

Reduction of torque ripple in a wound‐rotor brushless doubly‐fed machine by using the tooth notching

Wang

Xiong

et al. 2018

IET Electric Power Applications

View full text Add to dashboard Cite

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“…There are two different approaches to reduce torque ripple in a motor. In the first approach, attempts are made to reduce the torque ripple by modifying the physical structure of the stator and rotor of the motor (including tooth, slots, windings and PMs) [3][4][5][6][11][12][13]. In the second approach, the torque ripple is reduced by applying an appropriate control method, which is the aim of the present paper.…”

Section: Introductionmentioning

confidence: 99%

Torque ripple and switching frequency reduction of interior permanent magnet brushless direct current motors using a novel control technique

Faiz

Heidari

Sharafi

2019

IET Power Electronics

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Although interior permanent magnet brushless direct current (IPMBLDC) motors have higher torque and power density compared to surface-mounted PMBLDC motors, the reluctance torque of IPMBLDC motors generates higher torque ripples. This study introduces a new current waveform as a reference to control the IPM motors while keeping the total developed torque constant. It also helps to considerably reduce the torque ripple of the motors. The experimental results show that this method significantly reduces the damaging impact of the reluctance torque ripple without complicating computations or changing the stator and rotor structures of the motor. Additionally, the switching frequency and consequently switching losses are reduced using the proposed technique.

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“…Brushless dc motors are popular in a wide range of industrial applications, such as computer peripherals, servo control systems and electrical tools due to their robustness, simplicity, large torque to volume ratio and high-efficiency [1][2][3][4][5][6][7][8][9]. Interior permanent magnet brushless DC (IPMBLDC ) electric motor [10][11][12][13][14][15][16][17] is an important category of these motors, constructed with the permanent magnets inserted into the steel rotor core and does not need to be glued such as in surface mounted permanent magnet motors. The leakage path of interior magnet motors usually includes a saturable magnetic bridge and the web, which will make the coefficient of flux leakage variable.…”

Section: Introductionmentioning

confidence: 99%

Permanent Magnet Brushless DC Motor and Mechanical Structure Design for the Electric Impact Wrench System

Tie-jun

2018

Energies

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This paper presents an analytical method to design an interior permanent magnet brushless DC electric motor (IPMBLDC motor) for a kind of electric impact wrench used for loading and unloading car bolts. It takes into account magnet assembly gap, rotor saturation webs, and bridges. Assumed flux leakage coefficient and selected working point of a permanent magnet were used in the initial design. An advanced equivalent magnetic circuit was developed to verify the total flux leakage and the quiescent operating point based on initial design parameters. Key design method points are considered and analyzed. Thermal analysis is given to simulate the temperature rise of all parts of the motor. The new impact wrench mechanical structure is designed, and its working principle analyzed. An electromagnetic field analysis based on MATLAB and the MAXWELL 2D finite element method (FEM) were used in the design to verify the equivalent magnetic circuit and optimize the IPMBLDC motor parameters. Experimental results are obtained to verify the design. The electrical and mechanical designs are combined and an analytical IPMBLDC motor design method is provided. We also show an innovative and reasonable mechanical dynamical calculation method for the impact wrench system, which can be used in whole system design of other functional electric tools.

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Optimal design of motor shape and magnetisation direction to obtain vibration reduction and average torque improvement in IPM BLDC motor

Cited by 41 publications

References 14 publications

Reduction of torque ripple in a wound‐rotor brushless doubly‐fed machine by using the tooth notching

Reduction of torque ripple in a wound‐rotor brushless doubly‐fed machine by using the tooth notching

Torque ripple and switching frequency reduction of interior permanent magnet brushless direct current motors using a novel control technique

Permanent Magnet Brushless DC Motor and Mechanical Structure Design for the Electric Impact Wrench System

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