The representative architecture below is how a merchant PPCU meets a Hall thruster. It is deliberately generic — not flight hardware, not an ISRO design.
Switching a high-voltage stage under full load throws energy into edges — loss in the devices, noise into the harness, margin eaten by filters.
Zero-voltage, zero-current transitions move the energy when there is nothing to slam — higher efficiency, calmer EMI, cooler magnetics. The craft is holding it across load, line and ignition.
Our founding team carried a ZVZCS power module to 6.5 kW at 90% overall efficiency inside ISRO's EP programme — a first for the class there.
The engineering model is designed around GaN FET candidates with published radiation data — higher switching frequency, smaller magnetics, a substantially lighter unit per kW. A design direction stated before the hardware earns it; the silicon breadboard stays the qualification anchor.
Sequence and gates published as they are passed — claims follow evidence here, not the other way around.