采用IGBT开关的变脉宽磁场产生电路。

IF 1.7 4区 工程技术 Q3 INSTRUMENTS & INSTRUMENTATION
Taichi Takezaki, Mayuko Koga, Takuya Sugimoto
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引用次数: 0

摘要

我们提出了一种利用绝缘栅双极晶体管(IGBT)开关产生可变脉宽高磁场的电路。实现可变脉宽磁场的一种方法是利用半导体器件开关电路的开路和短路。然而,在用于产生高磁场的线圈负载的情况下,在大电流开关过程中,电感能量以浪涌电压的形式释放,这可能导致开关器件失效。因此,我们提出了与线圈并联的外电路来吸收和耗散感应能量,并分析了电路中产生的浪涌电压和电流波形。基于电路分析的解析解与电路仿真结果吻合较好,表明了电路中电流和浪涌电压的瞬态响应波形。此外,结果揭示了浪涌电压和电流衰减时间常数之间的权衡,这取决于外部电路的电阻和电容值。一个反串联igbt的开关电路演示了在任意时间中断放电电流(峰值500a,脉冲宽度1ms FWHM,浪涌电压3kv)来驱动磁场。根据这些结果,实现了可变脉冲宽度的脉冲磁场。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Magnetic field generator circuit with variable pulse width using IGBT switching.

We propose an electric circuit that generates a high magnetic field with a variable pulse width using insulated gate bipolar transistor (IGBT) switching. One method to realize a magnetic field with a variable pulse width is to switch the circuit open and short using semiconductor devices. However, in the case of a coil load used to generate a high magnetic field, inductive energy is released as a surge voltage during high-current switching, which can lead to the failure of switching devices. Therefore, we proposed connecting an external circuit in parallel with the coil to absorb and dissipate the inductive energy and analyzed the surge voltage and current waveforms generated in the circuit. The analytical solution based on circuit analysis and the circuit simulation results showed good agreement, indicating the transient response waveforms of the current and surge voltage in the proposed circuit. Moreover, the results reveal a trade-off between the surge voltage and the current decay time constant, depending on the resistance and capacitance values of the external circuit. A switching circuit with anti-series connected IGBTs demonstrated the interruption of the discharge current (500 A peak, 1 ms FWHM pulse width, 3 kV surge voltage) at arbitrary timing for driving the magnetic field. From these results, a pulsed magnetic field with a variable pulse width was implemented.

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来源期刊
Review of Scientific Instruments
Review of Scientific Instruments 工程技术-物理:应用
CiteScore
3.00
自引率
12.50%
发文量
758
审稿时长
2.6 months
期刊介绍: Review of Scientific Instruments, is committed to the publication of advances in scientific instruments, apparatuses, and techniques. RSI seeks to meet the needs of engineers and scientists in physics, chemistry, and the life sciences.
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