公开(公告)号：US10680157B2

公开(公告)日：2020-06-09

申请号：US15782514

申请日：2017-10-12

Applicant: Microjet Technology Co., Ltd.

Inventor： Shih-Chang Chen ,  Jia-Yu Liao ,  Chi-Feng Huang ,  Wei-ming Lee ,  Yung-Lung Han

IPC: H01L41/04 ,  F04B17/00 ,  F04B49/06 ,  F04B43/04 ,  H02N2/06

Abstract: A driving system includes a voltage conversion module, a switching module, a detecting module, a voltage dividing module and a microcontroller. The voltage conversion module converts a first DC voltage into a second DC voltage. The switching module converts the second DC voltage into an AC voltage so as to drive a piezoelectric actuator of a piezoelectric pump. The detecting module includes a feedback circuit and a gas pressure sensor, wherein the feedback circuit detects an electric power reference value of the switching module, and the gas pressure sensor detects the gas pressure value of the piezoelectric pump. The microcontroller acquires a working frequency according to the electric power reference value so as to operate the piezoelectric actuator at the working frequency. The microcontroller controls the voltage conversion module to adjust the output voltage. Consequently, a gas pressure in the piezoelectric pump is correspondingly adjusted.