A high-voltage amplifier based on wireless data transmission isolation and its control method

Abstract

The invention discloses a high-voltage amplifier based on wireless data transmission isolation, and a control method thereof. The high-voltage amplifier comprises a main control processing unit and a plurality of auxiliary amplifier units; the main control processing unit comprises a main single-chip microcomputer, a main radio-frequency data transceiving module and a main power supply module; the main radio-frequency data transceiving module and the main power supply module are connected to the main single-chip microcomputer; the auxiliary amplifier units each comprise a slave radio-frequency data transceiving module, a signal conditioning and acquiring module, a slave single-chip microcomputer, a DDS waveform synthesis module, a filter module, a relay module, a same-phase / reverse-phase amplifier module and a slave power supply module; the slave radio-frequency data transceiving module, the signal conditioning and acquiring module, the relay module and the slave power supply module are connected with the slave single-chip microcomputer; and the slave single-chip microcomputer, the DDS waveform synthesis module, the filter module, the relay module and the same-phase / reverse-phase amplifier module are sequentially connected. By means of the high-voltage amplifier based on wireless data transmission isolation, and the control method thereof disclosed by the invention, the problem that the isolation voltage of an isolation amplifier is too low can be solved; and simultaneously, the amplifier waveform distortion problem based on the isolation amplifier or an optical coupler can be solved.

Description

technical field [0001] The invention relates to the technical field of signal amplifiers, in particular to an isolated high-voltage amplifier for wireless data transmission. Background technique [0002] In the field of high-voltage frequency-domain dielectric response testing and high-voltage industrial applications, high-voltage amplifiers are used as excitation sources in most cases, and high-voltage amplifiers are required to have certain bandwidth capabilities. Currently on the market, cascaded amplification is often achieved through isolated amplifiers or isolated optocouplers. However, due to the limitation of the isolation voltage of the isolation amplifier and the isolation optocoupler, the output voltage level is generally below 2kV, and the above two forms cause distortion of the original signal waveform to varying degrees. In the field of high-voltage frequency domain dielectric response testing, not only the waveform distortion rate of the excitation source is ...

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Problems solved by technology

[0004] At the same time, for the high-voltage amplifier realized by switching devices, due to the limitation of its principle itself, there is crossover distortion, and the waveform distortion will cause the dielectric spectrum curve to deviate from the frequency domain dielectric response test.

As for the transformer-isolated amplifier, due to the limitation of the transformer, its output frequency domain is extremely narrow, which cannot meet the needs of the high-voltage test field at all.

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