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

A piezoelectric ceramic drive and signal generator technology, applied in the power supply field, can solve the problems of low closed-loop frequency response bandwidth, reduced load capacity, charge leakage, etc., to achieve the same bandwidth of output power, reduce power supply voltage, and ensure safety. Effect

Inactive Publication Date: 2009-11-18
HARBIN INST OF TECH
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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 frequen

Method used

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

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[0024] The present invention will be further described below in conjunction with the drawings and specific embodiments:

[0025] 1. The principle topology of the present invention is as follows figure 1 Shown:

[0026] In this embodiment, a switching power supply is used to supply power to the entire system, and the output efficiency can reach more than 90%. The whole system is divided into 3 parts, the signal generating unit, the power amplifier module, the MCU unit is used in the middle to connect and realize the control functions such as keyboard and liquid crystal, and the power amplifier module output drives the PZT actuator. This system also uses functions such as voltage detection, current limit, and temperature protection to ensure the safety of the system when high power is output.

[0027] 2. Digital signal generator based on DDS

[0028] Piezoelectric ceramic drive power needs to use various dynamic waveforms (sine, triangle, sawtooth, etc.) as input signals in dynamic...

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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...

Claims

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Application Information

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IPC IPC(8): H02N2/00H03K3/02
Inventor 荣伟彬汝长海孙立宁黄春杜志博
Owner HARBIN INST OF TECH
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