Permanent magnet brushless dc motors for consumer products

Bentouati, S.; Zhu, Z. Q.; Howe, D.

doi:10.1049/cp:19991001

Cited by 29 publications

(16 citation statements)

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“…Also, θ, β, γ are rotor position, phase angle in mutual torque, and cogging torque, respectively. From Equations (2) and 3, the rotor point at which the mutual and cogging torque is zero should be determined by the phase angle of β and γ at each corresponding torque, respectively. Figure 2a shows the sum of mutual and cogging torque in a single-phase BLDC motor with symmetric air gap.…”

Section: Torque Production Of a Single-phase Bldc Motormentioning

confidence: 99%

“…Hence, it is more widely used in high-speed applications than the universal motor, due to absence of carbon dust output and no required maintenance on brush wear. A single-phase motor is suitable for cordless vacuum cleaners that require smaller size and lighter weight, due to its simple structure compared to a three-phase motor [2,3]. Since a cordless vacuum cleaner is battery powered, it is necessary to analyze the system efficiency, including electric and airflow performance, to get the longer duration of usage.…”

Section: Introductionmentioning

confidence: 99%

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Design of a Single-Phase BLDC Motor for a Cordless Vacuum Cleaner Considering the Efficiency of Airflow

et al. 2019

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This paper discusses an inverter-driven single-phase brushless direct-current (BLDC) motor assembled by a housing for a cordless vacuum cleaner. Air gap in the single-phase BLDC motor is asymmetrically designed to satisfy starting and continuous torque by considering voltage fluctuation in a battery. By varying both advance and conduction angles in response to the change of battery voltage, the proposed single-phase BLDC motor with asymmetric air gap is able to maintain sufficient output power. The system efficiency of a vacuum cleaner driven by the proposed motor assembly is estimated by means of fluid dynamics in air watt, and it is also verified experimentally. From the results of the condition of 100,020 r/min, it was confirmed that the motor efficiency was in good agreement with the estimated efficiency, and air flow efficiency of 45.7% and system efficiency of 41.8% were achieved.

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Section: Torque Production Of a Single-phase Bldc Motormentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of a Single-Phase BLDC Motor for a Cordless Vacuum Cleaner Considering the Efficiency of Airflow

et al. 2019

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“…Single-phase synchronous machines with magnets on the rotor [1] and brushless machines with permanent magnets on the stator [2][3][4][5][6][7][8][9] are used in high-speed low power applications where speed control and low cost are required.…”

Section: Introductionmentioning

confidence: 99%

Comparative Analysis of Two High-Speed Single-Phase Electrical Machines With Permanent Magnets on the Stator

Prakht¹,

Dmitrievskii²,

Kazakbaev³

et al. 2020

Elektroteh. elektromeh.

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Purpose. Single-phase machines with permanent magnets on the rotor are widely used in a variety of applications of a low rated power. When these machines are applied in high-speed applications, a retaining ring on the rotor core must be often used. However, it makes the assembly more complex and the high-speed machines become more expensive. On the other hand, machines with magnets on the stator still can be a valuable alternative due to their simple and reliable rotor design. In this paper the comparative study of performances of two single-phase electrical machines with magnets on the stator (flux reversal electrical machine and hybrid switched reluctance machine) is presented. The following performances have been compared: efficiency, weight, active materials cost, value of rated current of switches of the frequency converter. : electrical blowers, household appliances, fans, pumps and compressors of a low rated power etc. Practical value. The comparisons results of the flux reversal electrical machine and the hybrid switched reluctance machine has been obtained for the first time. References 15, tables 2, figures 13. Key words: high speed machines, hybrid switched reluctance machine, flux reversal electrical machine, permanent magnet machine, single-phase electrical machine, special electrical machine. Methodology. Calculation of electrical machines performances using solving two-dimension boundary magnetostatics problems. Results. The theoretical comparison of the flux reversal electrical machine and the hybrid switched reluctance machine has been carried out; the comparison on specific torque and efficiency of the two aforementioned machines have been obtained. The flux reversal machine has a significantly higher efficiency and a fewer weight. In addition, it has a lower value of rated current. On the contrary, the cost of active materials of the hybrid switched reluctance one is much less. Originality. The presented results can assist in selecting the best design alternative of electrical machines in the following applications Мета. Дослідження характеристик двох високошвидкісних однофазних електричних машин з магнітами на статорі (електрична машина зі змінним напрямом потоку і гібридна вентильно-індукторна реактивна машина): порівнюються такі характеристики як ККД, вага, вартість активних матеріалів, номінальний струм елементів перетворювача частоти. Методика. Розрахунок характеристик електричної машини за допомогою рішення двомірних крайових магнітостатичних завдань. Результати. Проведено порівняння двох типів однофазних машин з магнітами на статорі; отримано розрахункове порівняння характеристик однофазної електричної машини зі змінним напрямом потоку і однофазної гібридної вентильно-індукторної реактивної машини; отримані результати порівняння маси, розмірів і ККД двох машин. Наукова новизна. Уперше отримані результати порівняння однофазної електричної машини зі змінним напрямом потоку і однофазної гібридної вентильно-індукторної реактивної машини.Практичне значення. Отримані результати можуть допомог...

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“…In addition, to improve reliability and durability, it is necessary to eliminate the collector-and-brush motor assembly unit. However, these requirements cannot be satisfied with the use of an AC commutator (brushed, universal) motor (Figure 2a), traditionally used in vacuum cleaners and air blowers [2,3]. Therefore, for the application under consideration, the use of brushless electric motors is promising [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…A high-speed three-phase brushless synchronous motor for vacuum cleaners and air blowers [2] is shown in Figure 2b and a two-phase switched reluctance motor [3] is demonstrated in Figure 2c.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design of a High-Speed Single-Phase Flux Reversal Motor for Vacuum Cleaners

et al. 2018

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This paper describes the design of a single-phase high-speed flux reversal motor (FRM) for use in a domestic application (vacuum cleaner). This machine has a simple and reliable rotor structure, which is a significant advantage for high-speed applications. An FRM design in which the inner stator surface is entirely used allows it to decrease its volume and increase its efficiency. The mathematical modeling, based on the finite element method, and the optimal design of the high-speed single-phase FRM are described. The criterion of optimization and the selection of a proper optimization algorithm are discussed. Since the finite element method introduces a small but quasi-random error due to round-off accumulation and choosing the mesh, etc., the Nelder-Mead method, not requiring the derivatives calculation, was chosen for the optimization. The target parameter of the optimization is built for the motor efficiency when operating at different loads. Calculations show that the presented approach provides increasing motor efficiency during the optimization, particularly at underload.

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Permanent magnet brushless dc motors for consumer products

Cited by 29 publications

References 0 publications

Design of a Single-Phase BLDC Motor for a Cordless Vacuum Cleaner Considering the Efficiency of Airflow

Design of a Single-Phase BLDC Motor for a Cordless Vacuum Cleaner Considering the Efficiency of Airflow

Comparative Analysis of Two High-Speed Single-Phase Electrical Machines With Permanent Magnets on the Stator

Optimal Design of a High-Speed Single-Phase Flux Reversal Motor for Vacuum Cleaners

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