Next Article in Journal
Automatic Tool for Fast Generation of Custom Convolutional Neural Networks Accelerators for FPGA
Next Article in Special Issue
An Improved Model Predictive Torque Control for a Two-Level Inverter Fed Interior Permanent Magnet Synchronous Motor
Previous Article in Journal
A Cache Fill and Migration Policy for STT-RAM-Based Multi-Level Hybrid Cache in 3D CMPs
Previous Article in Special Issue
A Compound Current Limiter and Circuit Breaker
Open AccessArticle

A Wide-Frequency Constant-Amplitude Transmitting Circuit for Frequency Domain Electromagnetic Detection Transmitter

1
School of Electrical Engineering, Chongqing University, State Key Laboratory of Power Transmission Equipment and System Security, Chongqing 400044, China
2
Yellow River Survey Planning Design and Research Institute Co. LTD., Zhengzhou 450003, China
*
Authors to whom correspondence should be addressed.
Electronics 2019, 8(6), 640; https://doi.org/10.3390/electronics8060640
Received: 7 May 2019 / Revised: 30 May 2019 / Accepted: 5 June 2019 / Published: 6 June 2019
(This article belongs to the Special Issue Industrial Applications of Power Electronics)
In this paper, a novel AC magnetic transmitter current source circuit is proposed for application of frequency domain electromagnetic method (FEM) prospecting. The proposed current source circuit is capable of generating high frequency and high constant amplitude currents, which are key technical problems for FEM. It is suitable for very wide frequencies. The main circuit of the proposed current source consists of a rising-edge enhancing unit, a constant current control unit, and a high voltage clamping unit. Large constant clamping voltage is applied during the rising edge and the falling edge of the alternating square current to obtain a high frequency and high linearity current source. On the current flat stage, the constant current unit provides the energy to the load to ensure the constant amplitude of the output current. Detailed operations of the proposed magnetic current source are given. Simulation and experimental results demonstrate that the proposed circuit achieves short reversal time, the linearity of the rising/falling edge, constant amplitude and low power loss. These are the desired characteristics of the ac square current source probing transmitter for the magnetic FEM applications. View Full-Text
Keywords: current source circuit; voltage clamping; constant current control; frequency domain electromagnetic current source circuit; voltage clamping; constant current control; frequency domain electromagnetic
Show Figures

Figure 1

MDPI and ACS Style

Wang, X.; Fu, Z.; Wang, Y.; Wang, W.; Liu, W.; Zhao, J. A Wide-Frequency Constant-Amplitude Transmitting Circuit for Frequency Domain Electromagnetic Detection Transmitter. Electronics 2019, 8, 640.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop