High voltage piezoelectric ceramic driving power source and control method thereof

Abstract

The invention discloses a high voltage piezoelectric ceramic driving power source and a control method thereof, belonging to the technical field of driving power sources. The high voltage piezoelectric ceramic driving power source comprises a phase shifting parallel circuit unit, a control input, a power supply input end and a power supply output end; the phase shifting parallel circuit unit regulates the direct voltage signal input by the power supply input end according to an SPWM wave inputted by the control input end and generates continuous sine wave signals with an adjustable frequency and an adjustable amplitude at the power supply output end so as to drive the piezoelectric ceramic to generate micrometric displacement; and the phase shifting parallel circuit unit comprises multi-channel phase-shifting parallel circuit modules which are connected in series and used for increasing the output voltage. The method comprises the steps of: regulating the amplitude and the frequency ofthe output signal according to the SPWM signal and the direct current signal. The driving power supply is high in output voltage, large in driving current, high in output power and fast in frequencyresponse.

Description

technical field [0001] The invention relates to the technical field of driving power, in particular to a high-voltage piezoelectric ceramic driving power. Background technique [0002] Piezoelectric ceramics is a kind of information functional ceramic material that can convert mechanical energy and electrical energy to each other. It has positive and negative piezoelectric effects. It plays an important role in the field of micro-drive positioning. It can replace traditional pneumatic, mechanical and hydraulic drives with slow response, large inertia, poor reliability and complex structure. The main advantages are concentrated in its high positioning accuracy and high frequency response. and fast response speed. The displacement range can be accurate to the millimeter level, and the piezoelectric ceramic is compatible with the vacuum environment. In addition, under static working conditions, the load capacity is large and the power consumption is low. Therefore, piezoelec...

AI Technical Summary

Problems solved by technology

Although this technology can increase the output voltage to a certain extent, the increase in series half-bridge circuits not only makes the circuit more complicated, but also increases the difficulty of control. The output current ripple cannot be guaranteed, and the response of the entire system will also change. very slowly

Moreover, the output current is limited, which cannot well meet the requirements of high voltage and high current piezoelectric ceramics.

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