Dynamic piezoelectric or electrostrictive ceramic drive power supply

Abstract

The invention relates to drive power source of piezoelectric ceramic that comprises RS232 interface circuit, digital signal processor (DSP), and keyboard and display interface circuit, high voltage regulated voltage circuit, high voltage amplification system and drive circuit. The output end of the RS232 interface circuit and keyboard and display interface circuit are connected with the input end of the digital signal processor, the input end of the analog-to-digital converter circuit controls the voltage signal, the output end is connected with the input end of the digital signal processor, the output end of the digital signal processor is connected with the input end of the analog-to-digital converter circuit, the output end of the analog-to-digital converter circuit is connected with the input end of the high voltage amplification system, the output end of the high voltage amplification system is connected with the positive pole of the piezoelectricity or electrostriction ceramics L, the negative pole is connected with the low voltage end LV. The invention adopts the digital signal processor as the core; the drive circuit adopts the multi groups of MOS tube to construct, the peak current and power is big, the circuit possesses property that the dynamic response is well, reliability is high, null shift is small, the precision is high, adjustment is convenient.

Description

technical field [0001] The invention relates to a driving power supply circuit of piezoelectric ceramics and electrostrictive ceramics, in particular to a dynamic driving technology of piezoelectric ceramics and electrostrictive ceramics. Background technique [0002] Piezoelectric ceramic micro-displacement device is a new type of micro-displacement device, which has been widely used in precision positioning, micro-electromechanical systems, nano-manufacturing technology, nano-bioengineering and other fields. The driving of piezoelectric ceramics is inseparable from the driving power supply of piezoelectric ceramics. Piezoelectric ceramics are equivalent to capacitive loads, and the displacement of a single piezoelectric ceramic is very small. Therefore, in practical applications, multiple piezoelectric ceramics are often used A certain way is combined to form a piezoelectric ceramic stack. In this way, the capacitance of piezoelectric ceramics will be larger, such as the ...

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Problems solved by technology

However, the driving voltage range of the voltage is very large, and the power dissipation required by the circuit is very high. However, the design of the past piezoelectric ceramic driver focused more on static performance, and the peak current and peak power provided by the driver were not enough, resulting in the driver's The frequency response is not high, which limits the application of piezoelectric ceramic micro-displacement in complex control and high-speed real-time occasions

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