Drive circuit‐based torque‐ripple suppression method for single‐phase BLDC fan motors to reduce acoustic noise

Hu, Hong-Jin; Cao, Guang-Zhong; Huang, Su-Dan; Wu, Chao; Peng, Yeping

doi:10.1049/iet-epa.2018.5234

Cited by 9 publications

(4 citation statements)

References 32 publications

(40 reference statements)

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“…Single-phase variable-speed motors are widely used in low-cost applications such as vacuum cleaners [1], blowers [2], power tools [3], pumps [4], compressors [5], and fans [6]. The main advantage of single-phase motors is the lower cost of the semiconductor inverter that has fewer transistors than in the case of a three-phase motor.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of a High-Speed Flux Reversal Motor with Bonded Rare-Earth Permanent Magnets

2021

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Single-phase flux reversal motors (FRMs) with sintered rare-earth permanent magnets on the stator for low-cost high-speed applications have a reliable rotor and a good specific power. However, to reduce eddy current loss, the sintered rare-earth magnets on the stator have to be segmented into several pieces and their cost increases with the number of magnet segments. An alternative to the sintered magnets can be bonded magnets, in which eddy current loss is almost absent. The remanence of bonded magnets is lower than that of sintered magnets, and they are prone to demagnetization. However, the cost of low-power motors with bonded magnets can be lower because of the simpler manufacturing technology and the lower material cost. This paper discusses various aspects of the optimal design of FRM with bonded magnets, applying the Nelder–Mead method. An objective function for optimizing an FRM with bonded magnets is designed to ensure the required efficiency, reduce torque oscillations, and prevent the bonded magnets from demagnetizing. As a result, it is shown that the FRM with bonded magnets has approximately the same efficiency as the FRM with sintered magnets. In addition, the peak-to-peak torque ripple is minimized and the minimal instantaneous torque is maximized.

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Section: Introductionmentioning

confidence: 99%

Optimal Design of a High-Speed Flux Reversal Motor with Bonded Rare-Earth Permanent Magnets

2021

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“…Single-phase motors are used in low-power, cost-effective, variable-speed applications. Various types of single-phase motors with magnets are known, such as a synchronous motor with magnets on the rotor surface [1][2][3][4][5] and motors with magnets on the stator [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. The main advantage of single-phase motors compared to three-phase motors is the cheaper single-phase frequency converter.…”

Section: Introductionmentioning

confidence: 99%

“…The main disadvantage of the single-phase machines is a low starting torque. Since the single-phase motors are cheap, they are used in low-cost variable speed drivers, such as fans [1,2], compressors [3], pumps [4], vacuum cleaners [5], and other household appliances and fluid machinery in which a high starting capability is not necessary.…”

Section: Introductionmentioning

confidence: 99%

Optimum Design of High-Speed Single-Phase Flux Reversal Motor with Reduced Torque Ripple

et al. 2020

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Single-phase motors are used in low-power, cost-effective, variable-speed applications. As a replacement to traditional single-phase synchronous motors with magnets on the rotor, single-phase flux reversal motors (FRMs) with a rugged and reliable toothed rotor are considered for the high-speed applications. However, torque pulsations of single-phase motors are high. The aim of this work is to minimize the torque ripple and increase its minimum instantaneous value, as well as to reduce FRM losses. To solve this problem, an asymmetric rotor is used, and an objective function is proposed, which includes parameters characterizing the pulsations of the torque and the loss of FRM for two load conditions. To optimize the single-phase FRM and minimize the objective function, the Nelder–Mead method was applied. The optimization criterion was selected to maximize the efficiency, to reduce the torque ripple, and to the avoid the negative torque in a wide range of powers at the fan load (quadric dependence of torque on speed). Two operating loading modes are considered. After two stages of optimization, the peak-to-peak torque ripple in the FRM in the rated loading mode decreased by 1.7 times, and in the mode with reduced load by 2.7 times. In addition, in the FRM before optimization, the torque has sections with negative values, and in the FRM after optimization, the torque is positive over the entire period. Although losses in the rated mode increased by 4%, when underloaded, they decreased by 11%, which creates an additional advantage for applications that work most of the time with underload.

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“…The proposed method works well in the low-speed range. The authors in [24] propose a voltage regulating circuit combining the H-bridge and the LRC circuit for a single-phase BLDC motor. The results show that the acoustic noise and the commutation torque ripple are obviously weakened.…”

Section: Introductionmentioning

confidence: 99%

Commutation Torque Ripple Reduction for Brushless DC Motor Based on an Auxiliary Step-Up Circuit

et al. 2019

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There exists torque ripple in the commutation process of brushless DC motor (BLDCM), which seriously restricts its application in the high-performance field. This paper proposes an auxiliary step-up circuit to suppress the commutation torque ripple of BLDCM, and the auxiliary step-up circuit consists of a transformer, a capacitor and a switch circuit. For effective suppression of the commutation torque ripple, the capacitor is charged in the non-commutation period. When the commutation occurs, the charged capacitor is added on the power source through a switch circuit to step up the dc-bus voltage in the commutation period, and the three-phase inverter is regulated to make the motor's input voltage is equal to four times the back electromotive force (back EMF) amplitude. The auxiliary step-up circuit only transfers partial power required in the commutation process of the motor, and the capacity of the power components is reduced accordingly. The inductive energy stored in the transformer is returned to the power source in each switching cycle, which improves the energy utilization rate. In addition, this method can also shorten the commutation time. The validity and effectiveness of the proposed method is verified through experimental results.INDEX TERMS Brushless DC motor, commutation torque ripple, dc-bus voltage, commutation time.

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Drive circuit‐based torque‐ripple suppression method for single‐phase BLDC fan motors to reduce acoustic noise

Cited by 9 publications

References 32 publications

Optimal Design of a High-Speed Flux Reversal Motor with Bonded Rare-Earth Permanent Magnets

Optimal Design of a High-Speed Flux Reversal Motor with Bonded Rare-Earth Permanent Magnets

Optimum Design of High-Speed Single-Phase Flux Reversal Motor with Reduced Torque Ripple

Commutation Torque Ripple Reduction for Brushless DC Motor Based on an Auxiliary Step-Up Circuit

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