二极管钳位型高压发射桥路研究

发布时间：2019-03-07 21:48

【摘要】：经济的快速发展使得对矿产资源的需求量日益增大,深部探测是解决矿产资源危机的一个有效途径。可控源音频探测法(Controlled Source Audio-frequency Magnetotelluric,CSAMT)是深部探测的一种有效的手段,具有探测深度大、工作效率高、分辨率高及抗干扰能力强等优点。可控源频率域电法探测仪器由发射机和接收机两部分组成,高压大功率发射有助于增强大地电磁场响应信号强度,提升接收机采集信号的信噪比,加大探测仪器的分辨率。发射桥路作为发射系统的一个关键装置,高压大功率发射桥路的研究对提升发射系统发射效率,探测精度和数据解释的准确度有着重要的意义。本文针对频率域电法勘探高压大功率发射需求,基于二极管钳位型多电平逆变原理,提出了电性源发射机的二极管钳位型高压发射桥路拓扑及其相应的时序控制策略,实现了电流连续模式下半周期三电平双极性近似方波发射,完成了1200V/20A高压大功率发射装置研制。实验结果表明,该发射装置具有发射功率大,所需功率器件耐压低,电磁干扰小,可靠性高等特点,能够满足可控源音频大地电磁法探测要求。
[Abstract]:With the rapid development of economy, the demand for mineral resources is increasing day by day. Deep exploration is an effective way to solve the crisis of mineral resources. Controllable source audio detection (Controlled Source Audio-frequency Magnetotelluric,CSAMT) is an effective method for deep detection. It has the advantages of large depth, high working efficiency, high resolution and strong anti-jamming ability. The instrument is composed of transmitter and receiver. High-voltage and high-power emission is helpful to enhance the response signal intensity of magnetotelluric field, improve the signal-to-noise ratio of the collected signal, and increase the resolution of the detecting instrument. As a key device of the transmitting system, the research of the high-voltage and high-power transmitting bridge is of great significance to the improvement of the transmitting efficiency, the detection accuracy and the accuracy of the data interpretation of the transmitting system. In this paper, based on the principle of diode-clamped multilevel inverter, the topology and timing control strategy of diode-clamped high-voltage transmission bridge for electrical source transmitter are presented, according to the requirements of high-voltage and high-power emission exploration by frequency domain electric method, and based on the principle of diode-clamped multilevel inverter. The half-period three-level approximate square wave emission in current continuous mode is realized, and the high-voltage and high-power transmitting device of 1200V/20A is developed. The experimental results show that the transmitter has the characteristics of high transmission power, low resistance of required power devices, low electromagnetic interference and high reliability, which can meet the requirements of audio-frequency magnetotelluric method detection with controllable source.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH763.1

【相似文献】