High voltage piezoelectric ceramic driving power source and control method thereof

A piezoelectric ceramic drive and power supply technology, which is applied in the direction of piezoelectric effect/electrostrictive or magnetostrictive motors, generators/motors, electrical components, etc., can solve problems that cannot meet high voltage and high current requirements Problems such as piezoelectric ceramics, output current ripple cannot be guaranteed, and the circuit of the series half-bridge circuit are complicated, etc., to achieve the effect of increasing power, simple circuit, and easy integration

Active Publication Date: 2019-11-01
宁波德图科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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 r

Method used

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  • High voltage piezoelectric ceramic driving power source and control method thereof
  • High voltage piezoelectric ceramic driving power source and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] Such as figure 1 As shown, in embodiment 1, a high-voltage piezoelectric ceramic drive power supply, which specifically includes a phase-shifting parallel circuit unit, a DSP control circuit, a PWM rectifier circuit unit, an optical isolation unit, a drive circuit, a feedback circuit, and an isolated power supply circuit And auxiliary power circuit. The PWM rectifier circuit unit performs AC-DC rectification of AC220V city power, and outputs a stable DC voltage of 380~500V to the phase-shifted parallel circuit unit, and the stable DC voltage of 380~500V is used as the input DC voltage signal of the phase-shifted parallel circuit unit; The DSP control circuit receives the external DC signal source, analyzes the output voltage amplitude and frequency, and generates the SPWM signal with the first phase difference according to the number of half-bridge inverter circuits in the phase-shifting parallel circuit unit, and the phase-shifting parallel circuit is c...

Example Embodiment

[0041] Example 2

[0042] This embodiment provides a method for controlling a high-voltage piezoelectric ceramic drive power supply on the basis of Embodiment 1. It has the same inventive concept as Embodiment 1. The method specifically includes:

[0043] S01: The phase-shifting parallel circuit unit adjusts the amplitude and frequency of the output signal according to the SPWM signal and the DC signal. The SPWM signal is an SPWM signal with a first phase difference. The first phase difference is determined according to the number of half-bridge inverter circuits in the phase-shifting parallel circuit unit, and is used to ensure that the phase-shifting parallel circuit unit can output a continuously adjustable frequency and amplitude modulation sine. Wave voltage signal.

[0044] Further, adjusting according to the amplitude and frequency of the output signal includes:

[0045] S02: Adjust the SPWM fundamental frequency to achieve the adjustment of the output current frequency of the...

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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...

Claims

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Application Information

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IPC IPC(8): H02N2/00H02M7/5387H02M7/219H02M1/12
CPCH02M1/12H02M7/219H02M7/53873H02N2/0075H02N2/008H02M1/0077
Inventor 朱玉玉夏晓雪刘桃
Owner 宁波德图科技有限公司
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