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.