Patent ID: 7492060

Claim:
A fault-tolerant circuit device in a fuel cell AC inverter, comprising: a plurality of inverter units, said inverter unit comprising a capacitor and a plurality of switch diodes, said inverter units having a series connection; a dispatching and time-series control system, said dispatching and time-series control system being connected with said inverter units, said dispatching and time-series control system being connected with a plurality of fuel cells; a plurality of backup inverter units, said backup inverter unit comprising a capacitor and a plurality of switch diodes, said backup inverter units having a series connection, said backup inverter units having a series connection with said inverter units, said backup inverter units being connected with said dispatching and time-series control system; a control unit, said control unit being connected with said dispatching and time-series control system; a detection unit, said detection unit being connected with said inverter units, said backup inverter units and said control unit; and a switch unit, said switch unit being connected with said inverter units, said backup inverter units and said control unit.