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| 摘要: |
| 阐述了一种基于单片机控制的,用于电力电缆短路和断线故障测距的低压脉冲发生器.利用单片机的I/O口产生一定宽度和频率的脉冲,用此脉冲控制触发电路,产生相应宽度和频率的触发脉冲,此触发脉冲又触发具有快速开断性能的MOSFET产生相应的脉冲,通过脉冲变压器耦合输出到测试电缆上.所实现的低压脉冲发生器的脉冲宽度和周期可通过编程调节.该低压脉冲发生器的最窄脉冲宽度较小,可达到0.14μs;频率采用常用的100 Hz,也可灵活调整;电压幅值可达300 V以上,可根据不同情况调整电压幅值,以便检测不同长度的电缆;阻抗可调节,以匹配不同性能的电缆. |
| 关键词: 脉冲发生器 电缆故障测距 单片机 可编程 低压脉冲法 |
| DOI： |
| 分类号:TN782 |
| 基金项目: |
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| Development of low voltage pulse generator based on MCU |
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XU Min ZHENG Wenqi
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| Abstract: |
| A low voltage pulse generator controlled by MCU is developed to detect and locate the short-and open-circuit faults of power cables. The pulse of specified width and frequency is generated from the I/O ports of MCU to control the trigger circuit for generating trigger pulse of corresponding width and frequency,which is then input to MOSFET with fast-switching performance to generate corresponding test pulse,exerting on the power cable to be detected via pulse transformer. The pulse width and frequency can b... |
| Key words: pulse generator power cable fault locating singlechip programmable low voltage pulse |
