A piezoelectric ceramic driving power supply

Abstract

The invention provides a piezoelectric ceramic driving power supply which adopts a switch linear composite structure. The piezoelectric ceramic driving power supply comprises a digital power controller, a flyback converter switching power supply module with a high-quality output voltage and a high-voltage operational amplifier module. An output end of the digital power controller is connected to the flyback converter switching power supply module, an output end of the digital power supply controller is connected to the high-voltage operational amplifier module through a DAC circuit, and the flyback converter switching power supply module is connected to the high-voltage operational amplifier module. The piezoelectric ceramic driving power supply has the advantages that the low ripple noise of the output voltage of the piezoelectric ceramic driving power supply is realized, the contradiction between the ripple noise and the efficiency is solved by using the switching linear composite structure, the hysteresis loop effect of piezoelectric ceramic is improved, a proportional current source is set in a linear power supply part, a good limiting effect on piezoelectric ceramic charging current is achieved, and the zero overshoot of the output voltage of the driving power supply is achieved.

Description

technical field [0001] The invention relates to a driving power supply, in particular to a piezoelectric ceramic driving power supply. Background technique [0002] Piezoelectric ceramic actuators have been widely used in the field of micro-displacement actuation due to their advantages of high precision, small size, and strong anti-electromagnetic interference. [0003] With the improvement of high-voltage operational amplifier technology, integrated high-voltage operational amplifier chips (such as PA78, PA85) are increasingly used as the core chip of piezoelectric ceramic drive power due to their advantages of simple circuit structure and wide frequency response range. However, the high-voltage operational amplifier chip has weak anti-radiation ability, and the radiation environment will have varying degrees of impact on its performance, or even make it invalid. At the same time, the high price limits its application range to a certain extent. [0004] Using discrete com...

AI Technical Summary

Problems solved by technology

[0005] In the existing drive power supply, there are few studies on the quality of the auxiliary power supply to the steady-state ripple noise of the piezoelectric ceramic output voltage. In order to obtain a low ripple noise auxiliary source, some drive power supplies use multiple linear regulators in series. Although this method can obtain low ripple noise, it greatly increases power consumption, so the design is unreasonable

Images