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The extension of capacitive behavior to the AC regime (∼100 Hz) opens up an avenue for a number of new applications where physical volume of the capacitor may be significantly reduced.
Thus, the capacitor deterioration can be diagnosed.
The ICS is unaffected by the environment and can provide direct measurement of real-time fan operational status by sensing the AC current drawn by the fan motor.
The chemistry developed during this study displayed long-term cycling potential and demonstrated the stability of the capacitor for continued usage.
Open accessJournal ArticleDOI
Stefano Schiavon, Arsen Krikor Melikov 
01 Nov 2009-Hvac&r Research
32 Citations
A standard method for testing fan cooling effect and an index for determining fan efficiency, such as the CFE index proposed in this study, need to be developed.
The research reported in this paper indicates that the filter capacitor will accumulate and dissipate increased amount of charge when the rectifier is subjected to ac source voltage fluctuations.
This paper presents a new measuring method for comparing different impedances, which allows, for example, the capacitance and the dissipation factor of a capacitor to be determined from the resistance and the time constant of an AC resistor.
The analysis of experimental results indicated that longitudinal and fan-shaped non-uniform pollutions compared to uniform pollution contributed to an increase and a decrease in the ac flashover voltage, respectively.
On the basis of collected fan-use models, probit regression models of fan-use rates and ambient environments were obtained and indicate that the essential trigger of fan-use is a warm environment rather than building types.
Due to the elimination of the fan power in the proposed method, the efficiency of the dc–dc converter increases during the hold-up time; thus, the energy stored in the link capacitor decreases less sharply, compared with the conventional method.

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