Abstract
PLZT element that is a kind of piezo element has a unique characteristic that is called photovoltaic effect. The photovoltaic effect of the PLZT element causes very high voltage when exposed to ultraviolet light. We propose an electrostatic optical motor driven by the photovoltaic effect and electrostatic force. High voltage generated by the photovoltaic effect causes electrostatic force. And the electrostatic optical motor makes rotational motion by the electrostatic force. This new type motor has some superior characteristics such as non-contact energy supply, large rotational motion and the like. A characteristic of the electrostatic optical motor depends on the characteristic of photovoltaic effect such as maximum generated voltage and the like. In this paper, therefore, effect of polarizing applied voltage on the photovoltaic effect of the PLZT element is described due to get a PLZT element that has higher maximum generated voltage.
