New power modulator for high voltage accelerators

New power modulator with less stray capacitance is proposed for HVDC accelerators which are used as actuators of tokamak fusion device, such as EAST (Experimental Advanced Superconducting Tokamak), ITER or CFTER (China fusion engineering test reactor). It is implemented with high frequency insulation transformer for powering loads of the accelerator floating on its high voltage pole, such as its extraction grid, plasma grid, RF system, bias plate and snubbers for fast-fault-protection (FFP). It facilitates its FFP design to satisfy IEC EMC standards implemented by ITER or ITER-like CFETR. Based on our former work [Ge Li et al., "Compact Power Suppliers for Tokamak Heating.", IEEE Trans. on DEI, Vol. 19, No. 1 (2012)], a 3 kA power module is designed for powering the plasma grid, as might be configured a new roadmap with less stray capacitance for reliable engineering design of HVDC accelerators in CFETR.