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http://dx.doi.org/10.5293/kfma.2017.20.1.005

System-level Analysis of a Fan-motor Assembly for Vacuum Cleaner  

Park, Chang-Hwan (Samsung, Electro-Mechanics Co.)
Park, Kyung-Hyun (Samsung, Electro-Mechanics Co.)
Chang, Kyung-Sik (Hanseo University, Aero-Mechanical Engineering)
Publication Information
The KSFM Journal of Fluid Machinery / v.20, no.1, 2017 , pp. 5-14 More about this Journal
Abstract
A fan-motor assembly in a vacuum cleaner is analyzed through system-level analysis method. This system consisted of three components, a fan, motor, and the flow resistance of the motor, or of the vacuum cleaner. System-level analysis method is characterized by the combination of torque matching at a constant throttling condition between the fan and the motor and the pressure drop at a constant flow rate due to the flow resistance of the motor, or of the vacuum cleaner. The performance characteristics of the fan-motor assembly and the vacuum cleaner system could be predicted over the whole range of operation, based on the characteristics of each component. The predicted performance of the vacuum cleaner system through system-level analysis agreed well with the experimental results within 4.5% difference of pressure and 6% difference of the efficiency. The effect of flow resistance of a motor is investigated and it is found that the efficiency decrease of fan-motor assembly at the constant flow rate due to the flow resistance of a motor is determined by the flow resistance ratio(FRR), which is defined as a ratio of flow resistance of motor and the flow resistance of a constant throttling condition of a given point. The fan-motor assembly(S2 model) was modified to reduce the FRR from 9.0% to 2.4% and the experimental result shows that the efficiency of S2 model was improved by about 3% at best efficiency point.
Keywords
System-level Analysis; Fan-motor; Flow Resistance; Torque Matching; Pressure Drop;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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