| 基于磁隔离驱动的亚微秒高压脉冲电源 |
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| 引用本文： | 饶俊峰,宋子鸣,王永刚,姜松,李孜.基于磁隔离驱动的亚微秒高压脉冲电源[J].强激光与粒子束,2021,33(11):115002-1-115002-7. |
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| 作者姓名： | 饶俊峰 宋子鸣 王永刚 姜松 李孜 |
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| 作者单位： | 上海理工大学 机械工程学院, 上海 200093 |
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| 基金项目： | 国家重点研发计划项目(2019YFC0119100)；上海市青年科技英才扬帆计划项目(20YF1431100)；上海理工大学-上海交通大学医学院医工交叉重点支持项目（2021005） |
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| 摘 要： | 为满足不可逆电穿孔对高压纳秒脉冲电源的需求，并且突破电源模块耐压的限制，提出了一款以正极性Marx为主电路、具有ns级前沿的高重复频率的亚微秒高压脉冲电源。该脉冲电源使用光纤传输信号，经过驱动芯片放大信号后，利用磁芯变压器传递驱动信号给MOSFET。磁芯变压器给电路提供了磁隔离，使驱动电路不会受高压输出的影响，提高了电路的耐压水平。驱动电路设计简单，所需元器件较少，可提供负压偏置，使开关管可靠关断，提高电路的抗电磁干扰能力，保障电路稳定运行。此电源由16级电路构成，实验表明:在10 kΩ纯阻性负载上，当输入电压为630 V时，即可得到10 kV的高压输出。其最小脉宽为300 ns，频率1 Hz～10 kHz可调。该脉冲电源结构紧凑，能够做到输出电压、脉宽、频率可调。研究了磁芯材料和匝数对驱动脉宽的影响。结果表明:匝比的增加会影响信号脉宽，在一定的条件下，单匝电感量的差异和磁芯材料的不同对信号脉宽的影响较小。
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| 关 键 词： | 亚微秒脉冲 磁隔离 脉冲电源 脉冲变压器 |
| 收稿时间： | 2021-07-30 |
Sub-microsecond high voltage pulse power supply based on magnetic isolated driving |
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| Affiliation: | School of Mechanical Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China |
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| Abstract: | To meet the demand of irreversible electroporation for nanosecond pulse power supply, this paper proposes a sub-microsecond high voltage pulse power supply with high repetition frequency, which is based on positive Marx circuit and has ns rising time. The pulse power supply uses optical fiber to transmit signals. After the driver chip amplifies the signal, the magnetic core transformer is used to transmit the drive signal to the MOSFET. The magnetic core transformer provides magnetic isolation to the circuit, so that the drive circuit will not be affected by the high voltage output and the withstand voltage level of the circuit is improved. The design of drive circuit is simple, and it requires fewer components. It provides negative bias voltage so that the switch can be reliably turned off and can effectively improve the electromagnetic compatibility. A 16-stage prototype has been built. The experiment showed that 10 kV square pulses were obtained over 10 kΩ resistive load when the input voltage was 630 V. Its minimum pulse width is 300 ns, and the frequency is adjustable from 1 Hz to 10 kHz. The pulse power supply is compact, and can flexibly adjust the voltage amplitude, pulse width and frequency. The influence of the magnetic material and number of turns of the windings of the magnetic core are also studied. The increase of turns ratio will affect the signal pulse width. Under certain conditions, the difference of single turn inductance and magnetic core material have little effect on signal pulse width. |
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