High-dynamic high-power bridge-type piezoceramics driving power with signal generator

Abstract

The invention provides a high-dynamic high-power bridge-type piezoceramics driving power with a signal generator, comprising a signal generating unit, a power amplifier module and an MCU unit, wherein, the signal generating unit is connected with the power amplifier module via the MCU unit so as to realize control functions of a keyboard, liquid crystal and the like; power amplifier module output drives a PZT actuator, and the MCU unit is also connected with the keyboard, the liquid crystal and a serial port; the power amplifier module is connected with an analog input unit, the MCU unit and the power amplifier module are respectively connected with a protective circuit, and the signal generating unit, the power amplifier module and the MCU unit are respectively connected with a power supply source unit. The invention can be used in application scopes such as fine spark machining and the like, which have high requirements on movement and power; a signal generating unit can be self-provided by FPGA, signal is amplified by a bridge-type circuit so as to realize functions of high-dynamic high-power output, etc.

Description

(1) Technical field [0001] The invention relates to the field of power supply, and in particular relates to an application for driving piezoelectric ceramics, which is a driving power supply for a capacitive micro-actuator. (2) Background technology [0002] The piezoelectric ceramic micro-displacement device has the characteristics of small size, high displacement resolution, high frequency response, no noise, no heat, etc., and is an ideal micro-displacement element. With the continuous development of science and technology, the scope of our research has also developed from the macrocosm to the microcosm, and the piezoelectric ceramic driver just meets the needs of this development, so all countries in the world are competing to develop piezoelectric ceramic drive power technology. Research. The driving methods of piezoelectric ceramics widely studied at present mainly include voltage driving and current driving. The current drive method has good open-loop control linear...

AI Technical Summary

Problems solved by technology

The current drive method has good open-loop control linearity, strong load capacity, and wide frequency band, but poor low-frequency stability, and there are problems such as charge leakage, output voltage saturation, and zero-point displacement control.

Although the voltage driving method has better stability and static characteristics, its load capacity is significantly reduced under high-speed motion conditions, and its closed-loop frequency response bandwidth is low (below 1Kz). In complex environments such as internal combustion engine fuel injection and fine electric discharge machining, not only the positioning accuracy is required, but also the dynamic performance and power requirements are getting higher and higher, and high dynamic and high power output are contradictory, so how to Solving this contradiction has important theoretical significance and practical value

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