Micromotor Using Multilayer Annular Piezoelectric Ceramics

Abstract

The invention discloses a micromotor employing multilayer annular piezoelectric ceramic, and belongs to the field of a piezoelectric driver, a small and special electrical machine and a miniature driver. The micromotor comprises a shell, wherein a stator and a rotor are arranged in the shell, the stator comprises a stator round ring, contacts are arranged at one side of the stator round ring, the multilayer annular piezoelectric ceramic is arranged at the other side of the stator round ring, the multilayer annular piezoelectric ceramic is uniformly divided into an even number of partition regions, the polarization directions of two adjacent partition regions are opposite, the energization directions of two adjacent layers of annular piezoelectric ceramic are opposite, a positive electrode and a negative electrode are arranged on an upper surface and a lower surface of the multilayer annular piezoelectric ceramic, the positive electrode is also divided into an even number of partition regions which are in one-to-one correspondence to the partition regions of the multilayer annular piezoelectric ceramic, the number of the partition regions of the multilayer annular piezoelectric ceramic are two times of the number of the contacts, and the positions of the contacts are corresponding to empty regions between the partition regions of two adjacent electrodes. Compared with the prior art, the micromotor has the characteristics of low-voltage driving performance, high stability and large torque output.

Description

technical field [0001] The invention relates to the fields of piezoelectric drivers, micro-special motors and micro-drivers, in particular to a micromotor using multi-layer annular piezoelectric ceramics. Background technique [0002] Micro motors generally refer to motors with small size (overall structural size or size in a certain direction), high positioning accuracy (or repeat positioning accuracy), low energy consumption, and high power density. At present, more and more researches and engineering applications have created an urgent demand for micro motors, while traditional wound electromagnetic motors are difficult to miniaturize due to their complex structures. In the late 1980s, researchers used silicon micromachining technology to manufacture electrostatic micromotors with a diameter of several hundred microns, which triggered a revolution in microactuators in the field of microelectromechanical systems (MEMS, Micro Electromechanical System). . However, although...

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