Nanomaterials-driven innovative electrochemiluminescence aptasensors in reporting food pollutants

A novel high‐voltage solid‐state switch based on the SiC MOSFET series and its overcurrent protection

In this article, an air-isolated module with adjustable insulation based on magnetic coupling resonance is proposed for high-voltage pulse generators. The insulation level can be adjusted rapidly over a wide range by changing the air gap. By virtue of invariable dielectric properties of air, the module can avoid electrical aging and reduce the risk of electrical breakdown. Tests are performed from insulation and power supply, respectively. Finally, a 24-stage air-isolated pulse generator prototype is tested. The results reveal that dc isolation level of the proposed module can be easily changed in a wide range, while maintaining stable power supply to multiple gate drivers. This module, which is no less cheap and light than existing isolators, provides a high compatible isolating solution in solid-state pulse generators under different applications. 

Magnetic Coupling Resonant-Based Air-Isolated Module for High Voltage Pulse Generators

In this article, an air-isolated module with adjustable insulation based on magnetic coupling resonance is proposed for high-voltage pulse generators. The insulation level can be adjusted rapidly over a wide range by changing the air gap. By virtue of invariable dielectric properties of air, the module can avoid electrical aging and reduce the risk of electrical breakdown. Tests are performed from insulation and power supply, respectively. Finally, a 24-stage air-isolated pulse generator prototype is tested. The results reveal that dc isolation level of the proposed module can be easily changed in a wide range, while maintaining stable power supply to multiple gate drivers. This module, which is no less cheap and light than existing isolators, provides a high compatible isolating solution in solid-state pulse generators under different applications.

An Adjustable High-Voltage Exponential-Like Decay Pulse with Bio-Load Independence for Tissue Ablation Using Combining Electroporation and Electrolysis

In order to meet the requirements of high voltage, high power, and compactness for pulse generators used in the field of liquid food sterilization, an all-solid-state Marx generator based on a novel magnetic isolated drive is proposed. The drive circuit uses the magnetic core to transfer the control signal, which adopts core stacking and inverse paralleled secondary side winding. It only needs one drive signal to realize synchronous conduction of the main switch or bypass switch and the complementary conduction of both. The maximum pulse width of drive signal is not limited by the magnetic core saturation. The topology is simple, and the problem of high voltage isolated drive of Marx generator is solved. Based on the novel magnetic drive, a 31-module solid-state Marx generator is built and a prototype test is carried out. The test results show that the maximum instantaneous power of this generator is 1.3 MW (30 kV, 43 A) with a pulse width of 3–10 μs and an adjustable repetition frequency of 0–1 kHz.

Zhiwen Zhang

Papers

High Voltage Pulse Generator Based on a Novel Magnetic Isolated Drive Circuit

Potential-Resolved Differential Electrochemiluminescence Immunosensor Based on Novel Designed Ibphf for Self-Correctable Detection of Afb1

The Spatiotemporal Distribution and Deposition Flux of Atmospheric Microplastics in a Mega City—Wuhan, Central China