Dynamic bipolar drive power supply for piezoelectric ceramics and implementation method

Abstract

The invention relates to a dynamic bipolar drive power supply suitable for driving piezoelectric ceramic capacitive load and the like, comprising a signal waveform generating unit, a DC power supply and a signal amplifying and driving unit; wherein, the signal waveform generating unit generates required waveform signals through software, the waveform signals are output to a digital-to-analog conversion board; after digital-to-analog conversion, analog signals are output to an input terminal of a voltage amplifier circuit; the output terminal of the voltage amplifier circuit is connected with the input terminal of a power amplifier circuit; the power amplifier circuit adopts the current follower amplifying form of parallel-push-pull; the output terminal of the power amplifier circuit is connected with the positive electrode of the piezoelectric ceramic load; the negative electrode of the load is earthed. The drive sine frequency of the drive power supply can achieve 20KHz, the output voltage can achieve + / -150V and the output ip-p can achieve 3 ampere. The invention can output such standard waveforms as sine waves, triangular waves, square waves, sawtooth waves and the like, can be added with DC bias, has the characteristics of accurate and flexible control, good dynamic characteristics, little waveform distortion and the like, and can be used for dynamic control and performance test of piezoelectric actuators.

Description

technical field [0001] The present invention relates to the field of piezoelectric ceramic driving power supply, in particular to a dynamic bipolar piezoelectric ceramic driving power supply, which has a DC output and a wide-band driving capability from dynamic to audio range, and has a positive and negative bipolar output function, suitable for Broadband dynamic bipolar drive power supply for capacitive loads such as piezoceramic drivers. Background technique [0002] Piezoelectric ceramic driver is a new type of micro-drive device. It works on the principle of inverse piezoelectric effect of piezoelectric ceramics. Because of its nanoscale resolution and fast response speed, it has broad application prospects in the fields of microelectronics and precision machinery. Piezoelectric ceramic driver is a kind of capacitive load, which usually has a large equivalent capacitance. Although this type of load consumes very little power under static conditions and requires little ma...

AI Technical Summary

Problems solved by technology

The current driving circuit cannot provide reliable driving capability in the high frequency range, and the fast response capability of the piezoelectric driver is limited, and most of them can only provide unidirectional driving, and cannot be used for occasions that require positive and negative bipolar driving. Meet the requirements, so the insufficient driving capability of the driving power supply becomes the bottleneck of the dynamic application of the piezoelectric driver

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