Transient Electromagnetic Transmitter Circuit with Speedy Shutoff Based on Passive Constant Voltage Clamping

Transient electromagnetic transmitter is a part of the transient electromagnetic detection system. In the aspect of short turn-off time for high-power current, there are still many problems to be solved urgently. This paper put forward a design scheme of transient electromagnetic transmitter, amplified the control signal with triode, and put forward a kind of passive constant voltage clamping absorbing circuit, which made the turn-off time shorter and the linearity of the emission currents lagging edge higher. This transient electromagnetic transmitter system is portable and easy to operate. Through experiments we can prove that the transmitter has the characteristic of short turn-off time and high reliability, and it has reached the requirements of field application.

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Constant Voltage-clamping Bipolar Pulse Current Source for Transient Electromagnetic System

Electric Power Components and Systems ◽

10.1080/15325008.2013.801058 ◽

2013 ◽

Vol 41 (10) ◽

pp. 960-971 ◽

Cited By ~ 9

Author(s):

Haitao Zhao ◽

Lihua Liu ◽

Kai Wu ◽

Youzheng Qi ◽

Guangyou Fang

Keyword(s):

Pulse Current ◽

Current Source ◽

Constant Voltage ◽

Bipolar Pulse ◽

Electromagnetic System ◽

Transient Electromagnetic ◽

Voltage Clamping

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Bipolar Triangular Wave Current Pulse Inverter for Shallow TEM Survey

MATEC Web of Conferences ◽

10.1051/matecconf/201817601036 ◽

2018 ◽

Vol 176 ◽

pp. 01036

Author(s):

Zhao Yifu ◽

Liu Lihua ◽

Geng Zhi ◽

Liu Xiaojun

Keyword(s):

Current Pulse ◽

High Voltage ◽

Voltage Source ◽

Constant Voltage ◽

High Quality ◽

Peak Current ◽

Triangular Wave ◽

Measurement Results ◽

High Voltage Source ◽

Voltage Clamping

A bipolar triangular wave current pulse inverter for shallow TEM survey is described. It can generate a peak current more than 10A and the PRF of the bipolar current pulse is between 1Hz and 10kHz. The proposed inverter contains a high voltage source circuit for the rising edge and a Zener diodes circuit with constant voltage clamping for the falling edge. Measurement results are presented, which show the high quality triangular wave current pulse with linear rising edge and rapidly turnoff falling edge.

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Research and Implementation of the Triangular Wave Pulse Power Device

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.241-244.657 ◽

2012 ◽

Vol 241-244 ◽

pp. 657-660

Author(s):

Da Yong Wu ◽

Sheng Bao Yu

Keyword(s):

High Reliability ◽

Pulsed Power ◽

Pulse Power ◽

Power Device ◽

Detection Systems ◽

Transient Electromagnetic ◽

Voltage Clamping ◽

Output Characteristics ◽

Dual Polarity ◽

Transmitted Waveform

The pulsed power is an important part of the airborne geophysical method detection systems. However, the traditional method of aerial transient electromagnetic transmitted waveform will cause the interference which is not conducive to process the post-data. The paper presents a new kind of dual polarity triangle pulse power device. The experimental results verify the correctness of theoretical analysis by using constant voltage clamping method to achieve emission of the isosceles triangular current pulse. Its falling edge of high linearity, high reliability, the output characteristics of a good anti-interference ability.

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