Insulated signal transmission system using planar resonant coupling technology for high voltage IGBT gate driver

An insulated signal transmission system using planar resonant coupling technology has been developed for providing driving signal transmission to control power electronic equipment. The resonant coupling can reduce the unwanted leakage that prevents conventional wireless systems from being applied inside the equipment. Using planar resonant couplers, the system restricted propagation loss to -0.9 dB and return loss to -10.0 dB in a wide frequency range of 2.2-2.78 GHz. Additionally, the couplers showed highly reliable parasitic capacitance characteristics and partial discharge characteristics. The developed system demonstrated switching operation of 3.3 kV-1200 A insulated-gate bipolar transistors (IGBTs) without disturbances between the highpower switching IGBTs and the RF transceivers.