Resilient Power Systems, LLC

Josh Keister

Mehdi T Abolhassani

Lyle T Keister

In one embodiment, an EV charging system includes: a plurality of first converters to receive and convert grid power at a distribution grid voltage to at least one second voltage; a high frequency transformer coupled to the first converters to receive the at least one second voltage and output at least one high frequency AC voltage; and a plurality of port rectifiers coupled to a plurality of secondary windings of the high frequency transformer, each of the port rectifiers comprising a unidirectional AC-DC converter to receive and convert the at least one high frequency AC voltage to a DC voltage. At least some of the port rectifiers may be coupled in series to provide at least one of a charging current or a charging voltage to at least one dispenser to which at least one EV is to couple.

Systems, apparatus and methods for electric vehicle charging via a power conversion system

In one aspect, an electric vehicle (EV) charging system includes: a plurality of first converters to receive grid power at a distribution grid voltage and convert the distribution grid voltage to at least one second voltage; at least one high frequency transformer coupled to the plurality of first converters to receive the second voltage and electrically isolate a plurality of second converters. The EV charging system may further include the plurality of second converters coupled to the output of the at least one high frequency transformer to receive and convert the at least one second voltage to a third DC voltage. At least some of the plurality of second converters are to couple to one or more EV charging dispensers to provide the third DC voltage as a charging voltage or a charging current.

In an embodiment, a power module may include: a plurality of first stages, each having an H-bridge to receive an incoming AC voltage at a first frequency and rectify the incoming AC voltage to a DC voltage; a plurality of DC buses, each to receive the DC voltage from one of the plurality of first stages; a plurality of second stages, each coupled to one of the plurality of DC buses to receive the DC voltage and output a second AC voltage at a second frequency; and a hardware configuration system having fixed components and optional components to provide different configurations for the power module.

Configurable power module for AC and DC applications

In one embodiment, an apparatus includes a surge voltage blocker circuit to couple between a distribution grid network and a grid-side power converter of a power conversion system. The surge voltage blocker circuit may include a plurality of series-coupled AC switch circuits, each including: a bidirectional switch formed of a first power transistor and a second power transistor; and a transient voltage suppression device coupled in parallel with the bidirectional switch.

Surge voltage protection for a power conversion system

In one embodiment, a system includes: an enclosure; a plurality of first converters adapted within the enclosure to receive grid power at a distribution grid voltage and convert the distribution grid voltage to at least one second voltage; at least one high frequency transformer adapted within the enclosure and coupled to the plurality of first converters to receive the at least one second voltage; a plurality of second converters adapted within the enclosure and coupled to an output of the at least one high frequency transformer to receive the at least one second voltage and convert the at least one second voltage to a third voltage; and a dielectric fluid adapted within the enclosure to provide dielectric isolation.

Growing community of inventors

Athens, GA, United States of America

Josh Keister