固态LTD的脉宽叠加技术仿真

doi:10.16180/j.cnki.issn1007-7820.2024.04.007

摘要/Abstract

摘要：

针对脉冲电磁场生物医学应用中所需求的高电压大电流宽范围脉冲问题,文中采用脉冲叠加的方案设计了一种长脉宽固态直线型变压器驱动源(Linear Transformer Driver,LTD)。该LTD脉冲发生器为了突破脉冲变压器伏秒积限制下的脉宽范围,采用并联叠加的方式增加输出脉宽。设计了脉冲变压器的复位电路,提高了LTD输出脉冲占空比,能够实现最少支路LTD的多次脉冲叠加。通过Pspice搭建仿真电路模型进行仿真实验,结果表明在单匝脉冲变压器伏秒积为146 V·ms的情况下,实现单级电压为300 V,脉宽为1.6 ms的脉冲输出,为其原伏秒积的3倍,且所提方案能够通过增加叠加脉冲个数来实现更宽范围的脉冲延长。

关键词: 脉冲功率技术, 直线型变压器驱动源, 脉冲电源, 脉宽延长, 脉冲叠加, 微秒脉冲, 脉冲变压器, 磁饱和

Abstract:

A long pulse width solid-state Linear Transformer Driver (LTD) is designed by means of pulse superposition for high voltage, large current and wide range pulses required in biomedical applications of pulsed electromagnetic fields. To break through the pulse width range under the volt-second product limit of the pulse transformer, the LTD increases the output pulse width using parallel superposition. The reset circuit of the pulse transformer is designed to improve the output pulse duty cycle of LTD, so that the multi-pulse superposition of the minimum branch LTD can be achieved. A simulation circuit model is built on Pspice to verify the design principle and the effect. In the case of a single-turn pulse transformer with a volt-second product of 146 V · ms, a pulse output with a single-stage voltage of 300 V and a pulse width of 1.6 ms is realized, which is 3 times of its original volt-second product, and a wider range of pulse extension can be achieved by increasing the number of superimposed pulses.

Key words: pulse power technology, linear transformer driver, pulse power supply, pulse width extension, pulse superimposed, microsecond pulse, pulse transformer, saturation magnetization

中图分类号:

TN782

余滔, 饶俊峰. 固态LTD的脉宽叠加技术仿真[J]. 电子科技, 2024, 37(4): 47-54.

YU Tao, RAO Junfeng. Simulation Study on Pulse Width Superposition of Solid-State LTD[J]. Electronic Science and Technology, 2024, 37(4): 47-54.

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