초록 ▼

A redundant power system includes plural load-sharing power supplies connected to a common AC output bus. Identical circuitry is provided in each supply to control the redundant operation and is connected to each of the others via a common redundancy bus. An arbitration circuit in each supply select

A redundant power system includes plural load-sharing power supplies connected to a common AC output bus. Identical circuitry is provided in each supply to control the redundant operation and is connected to each of the others via a common redundancy bus. An arbitration circuit in each supply selects a master power supply based on which supply detects the lack of a master supply first via the redundancy bus. A synchronization circuit in each slave supply synchronizes the polarity of the respective AC output with that of the master supply via the redundancy bus. A redundant bias circuit in each supply provides operating power to the redundancy circuitry in the respective supply from a common bulk voltage provided on the redundancy bus. A soft-start circuit in each supply allows all the supplies to start producing power at the AC output bus in unison. An overvoltage correction circuit in each supply detects an overvoltage on the AC output bus and shuts down only the supply which is causing the overvoltage.

대표청구항 ▼

1. A power supply for operation in a redundant power system, the power supply comprising:a power section comprising a power output for sharing a load with at least one other power supply; a redundant circuit controlling the power section for cooperation with a corresponding redundant circuit of the

1. A power supply for operation in a redundant power system, the power supply comprising:a power section comprising a power output for sharing a load with at least one other power supply; a redundant circuit controlling the power section for cooperation with a corresponding redundant circuit of the at least one other power supply, the redundant circuit operating as determined by a local master/slave status as one of a master and a slave; a common master-present connection for connection to a corresponding common master-present connection of the at least one other power supply; and arbitration logic in communication with the common master-present connection, wherein if the arbitration logic senses a master-not-present signal at the common master-present connection, then the arbitration logic sets the local master/slave status to master and transmits a master-present signal to the common master-present connection, and wherein if the arbitration logic senses a master-present signal at the common master-present connection and the local master/slave status is not set to master, then the arbitration logic sets the local master/slave status to slave.