用于激光二极管驱动和其他脉冲电流应用的基于碳化硅的两级脉冲功率转换器系统

IF 7.9 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC IEEE Open Journal of Industry Applications Pub Date : 2024-10-09 DOI:10.1109/OJIA.2024.3476428
Raj Kumar Kokkonda;Subhashish Bhattacharya;Victor Veliadis;Chrysanthos Panayiotou
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引用次数: 0

摘要

高功率激光二极管(LD)用于各种军事、医疗和工业应用。本文介绍了高功率脉冲 LD 阵列的独特驱动要求,并讨论了所需的转换器架构。采用了一种基于两级电容储能的脉冲功率转换器系统,该系统由一个基于相移全桥(PSFB)的电容充电电源(CCPS)和一个基于降压的带电感能量回收的脉冲电流源组成。该系统采用碳化硅场效应晶体管来提高基于开关稳压器的脉冲电流源的脉冲功率能力,以替代传统的线性电流驱动器。为脉冲电流源提出了一种重新配置的脉冲形成电路,它可以减轻输出寄生电感对 LD 的影响,而无需在负载上额外安装续流二极管。研究了电感器能量回收对脉冲电流源中半导体器件瞬态热应力的影响。研究了脉冲电流源中储能电容和滤波电感之间的权衡。设计了一种能够驱动 280 V LD 阵列的脉冲 LD 驱动器,并制作了硬件原型。通过在 250 V 输出电压下产生 50 A 电流脉冲,对整个系统进行了实验演示,从而验证了针对高脉冲功率 LD 驱动应用提出的转换器配置。
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A SiC Based Two-Stage Pulsed Power Converter System for Laser Diode Driving and Other Pulsed Current Applications
High-power laser diodes (LDs) are used in various military, medical, and industrial applications. In this article, the unique driving requirements of a high power pulsed LD array have been presented, and the required converter architecture has been discussed. A two-stage capacitive energy storage based pulsed power converter system consisting of a phase shifted full bridge (PSFB) based capacitor charging power supply (CCPS) and a buck based pulse current source with inductor energy recovery has been adopted. SiC FETs have been employed to increase the pulsed power capability of the switching regulator based pulse current source as an alternative to the conventionally used linear current driver. A reconfigured pulse forming circuit has been proposed for the pulse current source, which mitigates the effect of the output parasitic inductance on the LD without the need for an additional freewheeling diode across the load. The impact of inductor energy recovery on the semiconductor device's transient thermal stress in the pulse current source has been investigated. The tradeoff between the energy storage capacitance and the filter inductor in the pulse current source has been studied. A pulsed LD driver capable of driving 280 V LD arrays has been designed, and a hardware prototype has been built. The complete system has been experimentally demonstrated by generating 50 A current pulses at 250 V output voltage, validating the proposed converter configuration for high pulsed power LD driving applications.
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