基于窄脉冲传输的脉冲展宽IGBT驱动电路

石经纬; 赵娟; 冯荣欣

doi:10.11884/HPLPB201931.190206

基于窄脉冲传输的脉冲展宽IGBT驱动电路

doi: 10.11884/HPLPB201931.190206

1.
中国商用飞机有限责任公司北京民用飞机技术研究中心，北京 102211
2.
北京荣广盛工程管理有限公司，北京 100089

详细信息

作者简介:
石经纬(1984－), 男，博士，工程师，从事固态高压脉冲电源和等离子体表面改性技术研究; jingweishi@163.com

中图分类号: TM46;TN710
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- 被引次数: 0
出版历程
- 收稿日期: 2019-06-10
- 修回日期: 2019-07-20
- 刊出日期: 2019-11-15

Driving circuit for IGBTs with long pulse duration based on narrow pulses broadening

1.
Beijing Aeronautical Science & Technology Research Institute of Commercial Aircraft Corporation of China, Ltd, Beijing 102211, China
2.
Beijing ROCOSN Engineering Management Co, Ltd, Beijing 100089, China

摘要

摘要: 设计了一种采用高压隔离脉冲变压器传输窄脉冲，然后应用脉冲展宽电路实现宽脉冲驱动信号输出的无源IGBT驱动电路。采用正电压turn-on窄脉冲和负电压turn-off窄脉冲组合传输的方式以减小高压隔离脉冲变压器的体积和重量，脉冲展宽电路使IGBT在turn-on脉冲上升沿导通，在turn-off脉冲上升沿关断，且其具备储能功能，无需高压隔离辅助直流电源为其供电。脉冲信号发生电路和过流保护电路耦合设计，使IGBT在正常关断和过流保护关断情况下，其栅极都处于反压偏置状态，以提高IGBT关断的快速性和可靠性。将驱动电路用于级联Marx高压电路中IGBT开关的驱动，turn-on脉冲和turn-off脉冲的脉宽均选择为2 μs，结果表明，Marx电路在输出脉冲电压峰值为20 kV时工作稳定，且脉宽在3.5~50 μs之间连续可调，等离子体负载下的输出电压和电流波形显示，打火情况发生时，过流保护电路工作稳定可靠。该驱动电路可有效实现宽脉冲驱动信号的产生，具有较强的可靠性和实用性。
- 高压隔离脉冲变压器 /
- 窄脉冲 /
- 脉冲展宽 /
- IGBT /
- 驱动电路 /
- 过流保护 /
- Marx电路
Abstract: This paper proposes a driving circuit for IGBTs with long duration gating signals output, by which only narrow pulses are transferred by the high-voltage isolation pulse transformer and no high-voltage isolation DC power supplies are utilized. Narrow positive pulse "turn-on" and negative pulse "turn-off" are both transferred by the pulse transformer which is smaller and lighter, comparing with that transferring long duration gating signals. The pulse width broadening circuit turns the IGBTs on at the rising edge of "turn-on" pulse and turns the IGBTs off at the rising edge of "turn-off" pulse, and it also stores energy from "turn-on" pulse, without high-voltage isolation DC power supplies. Narrow pulses generator and over-current protection circuit are interactively designed to produce negative voltage pulse on the gate of IGBTs, which reduces the turn off transition period and enhances the turn off reliability, whether the IGBTs are normally turned off or closed due to over-current protection. The proposed driving circuit is applied to the cascaded high-voltage Marx generator, and the pulse widths of "turn-on" and "turn-off" pulses are both 2 μs. Experimental results show that the Marx generator functions well with maximum voltage output of 20 kV and pulse width at 3.5~50 μs. When arcing generates at plasma load, the over-current protection circuit reacts quickly to turn off the IGBTs with high reliability. The performance of the driving circuit proves its capability of producing long duration gating signals for IGBTs with high reliability and practical validity.
- high-voltage isolation pulse transformer /
- narrow pulse /
- pulse width broadening /
- IGBT /
- driving circuit /
- over-current protection /
- Marx generator

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图 1 驱动电路结构示意图

Figure 1. Schematic diagram of proposed driving circuit for IGBT

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图 2 驱动电路脉冲波形示意图

Figure 2. Pulse waveforms produced by the driving circuit

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图 3 脉冲turn-on和turn-off产生电路图

Figure 3. Circuit for turn-on and turn-off pulses generation

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图 4 高压隔离脉冲变压器

Figure 4. Pulse transformer with high-voltage isolation

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图 5 脉冲展宽电路图

Figure 5. Pulse width broadening circuit

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图 6 脉冲展宽电路工作状态

Figure 6. Operation principles of pulse width broadening circuit

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图 7 脉冲展宽电路波形图

Figure 7. Experimental voltage waveforms of the pulse width broadening circuit

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图 8 不同脉冲宽度时的U_G电压波形

Figure 8. Experimental waveforms of grid voltage U_G with various pulse widths

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图 9 不同脉冲宽度时的高压脉冲波形

Figure 9. Experimental waveforms of output voltage U_o with various pulse widths

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图 10 等离子体负载下的电压电流波形

Figure 10. Waveforms of U_o and I_o at plasma load

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