Patent ID: 11863014
Assignee: ABB SCHWEIZ AG
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A power supply assembly comprising:
a source connection system comprising a primary source connection adapted to be connected electrically to a primary alternating current supply, and at least one secondary source connection adapted to be connected electrically to a secondary current supply, the at least one secondary source connection being a direct current connection;
a load connection adapted to be connected electrically to an alternating current load;
a DC link;
a direct-current converter connected electrically between the at least one secondary source connection and the DC link, the direct-current converter being adapted to supply power from the at least one secondary source connection to the DC link;
a load supply converter connected electrically between the DC link and the load connection, the load supply converter being adapted to supply power from the DC link to the load connection; and
a supply switch adapted to disconnect the primary source connection from the load connection,
wherein the power supply assembly comprises a trickle charger converter connected electrically between at least one alternating current connection and the at least one secondary source connection, the trickle charger converter being adapted to supply power from the at least one alternating current connection to the at least one secondary source connection, and a nominal power of the trickle charger converter is less than nominal powers of the direct-current converter and the load supply converter,
wherein the power supply assembly comprises a control system adapted to control the direct-current converter, the load supply converter, the trickle charger converter and the supply switch, and
wherein the control system is adapted to provide a charging mode for the power supply assembly in which power is supplied to the at least one secondary source connection from the DC link through the direct-current converter.