Patent ID: 8378641

Claim:
A method of startup of an electric start electrical power generating system (EPGS), the EPGS comprising a generator configured to power a direct current (DC) load via a DC bus, the method comprising: disconnecting the DC load from the DC bus; connecting a battery to a boost converter, the boost converter being connected to the generator; powering the generator using the battery via the boost converter, wherein powering the generator using the battery via the boost converter further comprises a start inverter connected between the boost converter and the generator; when the generator reaches a minimum speed: disconnecting the battery from the boost converter; deactivating the boost converter; activating a synchronous active filter, the synchronous active filter being connected to the DC bus; and converting the start inverter into a rectifier when the generator reaches the minimum speed, wherein the rectifier is connected between the generator and the DC bus; bringing up a voltage on the DC bus by the generator; and when the voltage on the DC bus reaches a predetermined level, connecting the DC load to the DC bus.