Innovative Low-Cost Sub-Fractional HP BLDC Claw-Pole Machine Design for Fan Applications

Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

Abstract

As for mass-produced sub-fractional horsepower drives, non-optimal motor behavior (e.g., high cogging torque, output torque ripple, and noise) is often accepted when cost can be reduced, provided reliability is not compromised. This paper proposes an innovative claw-pole motor design for a low-cost single-phase brushless direct current fan drive, improving motor behavior with no increase to the manufacturing cost: 1) reducing cogging torque by proposing unconventional claw-pole skewing and 2) ensuring self-starting capability by implementing air-gap asymmetry. Both measures help reduce the total output torque ripple. The goal is to reduce fan drive noise, especially at low-speed operation, where cogging torque is often the dominating noise source. The design of stator claw skewing and air-gap asymmetry is presented; their effects on motor quantities are studied via simulations and experiments. With the exception of a small reduction of about 1.8% in the back electromotive force fundamental, skewing the stator claws by 30^{\circ } can reduce the cogging torque by 23% in the simulations and by 28% in the experiments.

Originalspracheenglisch
Aufsatznummer8606100
Seiten (von - bis)2558-2568
Seitenumfang11
FachzeitschriftIEEE Transactions on Industry Applications
Jahrgang55
Ausgabenummer3
DOIs
PublikationsstatusVeröffentlicht - 9 Jan 2019

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Machine design
Fans
Poles
Torque
Costs
Stators
Electromotive force
Air
Experiments

Schlagwörter

    ASJC Scopus subject areas

    • !!Electrical and Electronic Engineering
    • !!Control and Systems Engineering
    • !!Industrial and Manufacturing Engineering

    Fields of Expertise

    • Mobility & Production

    Dies zitieren

    Innovative Low-Cost Sub-Fractional HP BLDC Claw-Pole Machine Design for Fan Applications. / Leitner, Stefan; Grübler, Hannes; Muetze, Annette.

    in: IEEE Transactions on Industry Applications, Jahrgang 55, Nr. 3, 8606100, 09.01.2019, S. 2558-2568.

    Publikation: Beitrag in einer FachzeitschriftArtikelForschungBegutachtung

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    abstract = "As for mass-produced sub-fractional horsepower drives, non-optimal motor behavior (e.g., high cogging torque, output torque ripple, and noise) is often accepted when cost can be reduced, provided reliability is not compromised. This paper proposes an innovative claw-pole motor design for a low-cost single-phase brushless direct current fan drive, improving motor behavior with no increase to the manufacturing cost: 1) reducing cogging torque by proposing unconventional claw-pole skewing and 2) ensuring self-starting capability by implementing air-gap asymmetry. Both measures help reduce the total output torque ripple. The goal is to reduce fan drive noise, especially at low-speed operation, where cogging torque is often the dominating noise source. The design of stator claw skewing and air-gap asymmetry is presented; their effects on motor quantities are studied via simulations and experiments. With the exception of a small reduction of about 1.8{\%} in the back electromotive force fundamental, skewing the stator claws by 30^{\circ } can reduce the cogging torque by 23{\%} in the simulations and by 28{\%} in the experiments.",
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    KW - skewing

    KW - sub-fractional horsepower (hp)

    KW - torque measurement

    KW - torque ripple

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