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一种新型瞬变电磁仪发射电路设计

更新时间:2020-09-09 04:30:53 大小:499K 上传用户:六3无线电查看TA发布的资源 标签:电磁仪发射电路 下载积分:1分 评价赚积分 (如何评价?) 打赏 收藏 评论(0) 举报

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为提高瞬变电磁仪测量的准确度,设计了基于FPGA的瞬变电磁仪发射电路。该电路采用EXB841模块设计驱动电路,实现对H桥路上下臂MOSFET的有效驱动;利用改进的H桥路设计及改变传统桥路的控制策略,实现对MOSFET的超短时间关断;采用RCD吸收保护电路降低尖峰电压干扰,改善发射电路输出波形。试验结果表明,该发射电路的发射信号过压仅为正常信号的1.33倍,振荡时间为500ns,下降沿时间为700ns,实现了发射电流的快速关断,且稳定性好。

A transmission circuit of transient electromagnetic instrument based on FPGA was designed in order to improve measurement accuracy of transient electromagnetic instrument. Drive circuit of the transmission circuit was designed with module EXB841 to drive MOSFET located at up-down side of H-bridge, innovative H-bridge and control strategy realized very short turn-off time for MOSFET, and peak voltage interference was reduced by use of RCD protect circuit to improve output signal waves of the transmission circuit. The experiment results show that overvoltage of emission signal of the transient electromagnetic transmission circuit is only 1.33 times of the normal voltage, and the time for oscillating and falling edge are ...

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一种新型瞬变电磁仪发射电路设计.pdf 499K

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