一种新型瞬变电磁发射机快速关断电路设计

详细信息

Design of a novel fast turn-off circuit of transient electromagnetic transmitter

1.
School of Automation, China University of Geosciences(Wuhan), Wuhan 430074, China
2.
School of Mechanical Engineering and Electronic Information, China University of Geosciences(Wuhan), Wuhan 430074

摘要: 针对瞬变电磁发射机中发射线圈存在寄生电感导致发射电流关断时间过长的问题，设计了一种新型快速关断电路。在发射电流下降期间，该电路利用晶体管给发射线圈提供一条新的放电回路，利用该回路上电阻大、放电时间常数小的特点实现发射电流的快速关断。仿真和实验结果表明，该电路能够有效地降低瞬变电磁发射机的关断时间，且稳定性好。
- 瞬变电磁发射机 /
- 放电回路 /
- 时间常数 /
- 快速关断
Abstract: In view of problem that turn-off time of emission current of transient electromagnetic transmitter is overlong caused by parasitic inductance of the transmitter coils, a novel fast turn-off circuit was designed. During the decline of transmitting current, the fast turn-off circuit uses transistors to provide an additional new discharge circuit, which takes advantages of its large resistance and low discharge time constant to realize quick turn-off of the transmitting current. The results of simulation and experiment show that the novel circuit can decrease the turn-off time of transient electromagnetic transmitter effectively with high stability.
- transient electromagnetic transmitter /
- discharge circuit /
- time constant /
- fast turn-off

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