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How long should a motor run capacitor last? 

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The influence of capacitor value on motor characteristics is being investigated showing that there exists an optimum value of capacitor for a specific characteristic.
Experimental results, in the case of a single-phase capacitor motor, have demonstrated that the use of such a type of system has a significant energy conservation potential.
It is concluded that the elimination of the running capacitor provides an advantage only if the stator asymmetry is smaller or inexistent, as is the case of the symmetrical motor.
The simulation of a capacitor-run motor demonstrates the coupled discretization scheme and the high efficiency of this approach.
Starting current & starting time can be further reduced and voltage profile can be improved with the use of capacitor at the motor terminal as a compensating device.
Proceedings ArticleDOI
H. Langari, S. Vaez-Zadeh 
17 Jun 2001
12 Citations
The results confirm that the motor performance under the proposed system is improved substantially in comparison with a constant capacitor motor.
Open accessJournal ArticleDOI
02 Oct 1988
109 Citations
The system could be used to replace standard single-phase motor capacitor configurations to provide improved machine performance.
This paper demonstrates how the techniques of generalized harmonic analysis may be applied to a permanent split capacitor (PSC) motor, allowing for the effects of interbar currents.
The use of series capacitor banks appears to be helpful in some cases, while erratic and unexplained motor behaviour occurs in other cases.

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