Abstract: A marine vessel has AC generators and AC loads connected by circuit breakers to first and second AC bus systems respectively. First and second galvanic isolators, which include bidirectional AC/DC inverters are connected to each other and respectively connected to the first and second bus systems. As a result, power may be transferred to and from multiple galvanically isolated AC bus systems and to and from DC energy storage systems while maintaining DP-2 requirements.

Abstract: A plurality of generators redundantly supply power to AC motors via a main DC bus system having a pair of buses, each of which is connected to each generator by an active front end (AFE) inverter containing an insulated-gate bipolar transistor. Isolated DC/AC inverters are connected to the pair of main buses in pairs, respectively. Each pair of the isolated DC/AC inverters is connected to one of the AC motors with a filter of capacitors and inductors between each inverter and the motor. The AFE inverters and isolated DC/AC inverters galvanically isolate the main buses and enable load sharing among the generators.

Abstract: An apparatus, method, and non-transitory computer readable recording medium to control a pump system may include a memory storing instructions and a processor that executes the instructions to obtain initial motor data of a motor controlled by a variable frequency drive (VFD) and determine a normal speed baseline of the motor based on the obtained initial motor data. The processor may also obtain current motor data of the motor, detect a pump-off event of the pump system when the current motor data deviates from the normal speed baseline, and control the VFD in response to the detected pump off event.

Abstract: An adjustable rail support system for a variable frequency drive module enclosure includes a subpanel adapter plate mounted to a subpanel of the enclosure, a front clamp assembly, a main rail, the main rail slidably suspended from the subpanel adapter plate and the front clamp assembly, and a drive lift assembly slidably suspended from the main rail, the drive lift assembly configured to slidably suspend a variable frequency drive module at a position outside of the enclosure and an installation position on the main drive panel.