Theoretical characteristics of generalized type electret generator employing polymer film electrets

The rotor of the model generator proposed here consists of a conducting disk and several fan-shaped pieces of two sorts of electrets attached with their polarity reversing alternately on the conducting disk, and it has a brush. The generator becomes nonparametric when the two sorts of electrets have the same permittivity and thickness, and parametric when the electrets have different ones. Those generator´s fundamental characteristics were systematically investigated. It was found that the output current, votage and power of the nonparametric generator are greater than those of the parametric generator under the same conditions.