论文部分内容阅读
针对瞬变电磁系统发射机对大电流、短关断延时、高线性度的技术要求,论文提出一种新颖的基于BOOST升压原理的有源恒压钳位瞬变电磁发射机电路,详细论述了恒压钳位原理和电路设计方法,重点分析了发射电流下降沿及上升沿恒压钳位动态过程、电路参数计算以及钳位电压恒定原理.研制完成钳位电压500 V,发射电流峰值50 A,发射波形为双极性方波的瞬变电磁发射机,并通过一系列测试实验进行验证.测试结果表明,在大电流发射及感性负载条件下,论文提出的有源恒压钳位方法成功实现了电流下降沿快速、线性关断,从而有效提高了发射电流波形质量及瞬变电磁系统对地下目标的探测能力.
Aiming at the technical requirements of high current, short turn-off delay and high linearity of the transient electromagnetic system transmitter, a novel active constant voltage clamp transient electromagnetic transmitter circuit based on BOOST boost principle is proposed in the paper. The detailed The principle of constant voltage clamp and the circuit design method are discussed. The dynamic process of constant voltage clamping, the circuit parameter calculation and the constant voltage clamping principle are mainly analyzed at the falling and rising edge of emitter current. 50 A, the transient electromagnetic transmitter with bipolar square wave was launched and verified by a series of test experiments.The results show that under the conditions of high current emission and inductive load, the proposed active constant voltage clamp The method successfully realizes the fast and linear turn-off of the current, which effectively improves the waveform quality of the transmitted current and the detection ability of the transient electromagnetic system to the underground target.