Drive circuit for piezoelectric device and frequency tracking method for piezoelectric device

By directly acquiring electrical signals in the drive circuit of the piezoelectric device and determining the target frequency based on the trend of current sampling value changes, the problems of difficult noise processing and time-consuming frequency adjustment in the prior art are solved, realizing automated frequency adjustment and efficient conversion of the piezoelectric device.

CN115242122BActive Publication Date: 2026-07-14GUANGDONG SKG INTELLIGENT TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG SKG INTELLIGENT TECH CO LTD
Filing Date
2022-05-31
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

In existing piezoelectric drive circuits, the effective value of the current signal is small and the pulse width is narrow, which makes noise processing difficult, frequency adjustment time-consuming and laborious, and difficult to achieve automated control.

Method used

A driving circuit and frequency tracking method for a piezoelectric device were designed. The electrical signal of the driving circuit before voltage boosting is directly acquired by the electrical signal acquisition module to avoid noise introduction. The target frequency is determined by the control module based on the changing trend of the current sampling value to achieve automatic adjustment.

Benefits of technology

It improves the consistency of the operating frequency of piezoelectric devices, increases conversion efficiency, reduces user operation, and lowers noise control costs.

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Abstract

The embodiment of the present application discloses a kind of piezoelectric device drive circuit and piezoelectric device drive method, wherein, in the drive circuit of piezoelectric device, power module, electrical signal acquisition module, boost driving module are sequentially connected, control module is connected with electrical signal acquisition module, boost driving module, control module is used to obtain the first drive frequency range for driving piezoelectric device;Select multiple first frequencies in the first drive frequency range, drive piezoelectric device according to multiple first frequencies Work;According to the first current sample value corresponding to each first frequency in the drive circuit when driving piezoelectric device to work according to multiple first frequencies, it is acquired by electrical signal acquisition module;According to the change trend of multiple first current sample values, determine the target frequency for driving piezoelectric device.Using the embodiment of the present application, piezoelectric device can work below the best target frequency, improve the working efficiency of piezoelectric device, and realize the automatic adjustment of the target frequency, reduce user operation.
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