The high voltage, high frequency electrical characteristics of polyester films

This paper discusses an experimental study of the electrical properties of Mylar® polyester films. The investigation determined how the weight and volume of capacitors could be reduced while improving reliability. Test data relates the lifetime of a capacitor to its operating voltage, frequency, and temperature. The data also demonstrates the effect on life of per cent current reversal and insulation thickness. The study showed that a weight savings of 30% to 500% in capacitors can be achieved, but, more important, the test data enables capacitor designers to tailor products to specific applications, thereby achieving optimum performance.