AC bus system with battery charger/inverter backup
First Claim
1. For use with a power plant having a primary power supply that provides primary power to an AC bus for subsequent conversion to DC power, a backup power supply for providing backup power to said AC bus, comprising:
- a battery charger/inverter having first and second secondary switches and first and second charging switches, coupled to said AC bus and couplable to a battery, operable in;
a normal mode, wherein said first and second secondary switches are employed as synchronous rectifiers to convert a portion of said primary power to charge said battery, said first charging switch controlling a charging current and a charging voltage applied to said battery; and
a battery backup mode, wherein said first and second secondary switches are employed as an inverter to convert DC power from said battery to provide said backup power to said AC bus, said second charging switch boosting a voltage of said battery to a voltage of said AC bus.
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Accused Products
Abstract
A backup power supply for use with a power plant having a primary power supply that provides primary power to an AC bus for subsequent conversion to DC power and a method of providing backup power to the AC bus. In one embodiment, the system includes a battery charger/inverter, coupled to the AC bus and couplable to a battery, that operates in a normal mode to convert a portion of the primary power to charge the battery and operates in a battery backup mode to convert DC power from the battery to provide the backup power to the AC bus.
57 Citations
23 Claims
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1. For use with a power plant having a primary power supply that provides primary power to an AC bus for subsequent conversion to DC power, a backup power supply for providing backup power to said AC bus, comprising:
a battery charger/inverter having first and second secondary switches and first and second charging switches, coupled to said AC bus and couplable to a battery, operable in; a normal mode, wherein said first and second secondary switches are employed as synchronous rectifiers to convert a portion of said primary power to charge said battery, said first charging switch controlling a charging current and a charging voltage applied to said battery; and a battery backup mode, wherein said first and second secondary switches are employed as an inverter to convert DC power from said battery to provide said backup power to said AC bus, said second charging switch boosting a voltage of said battery to a voltage of said AC bus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. For use with a power plant having a primary power supply that provides primary power to an AC bus for subsequent conversion to DC power, a method of providing backup power to said AC bus, comprising:
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operating a battery charger/inverter having first and second secondary switches and first and second charging switches, coupled to said AC bus and couplable to a battery, in a normal mode, wherein said first and second secondary switches are employed as synchronous rectifiers to convert a portion of said primary power to charge said battery, said first charging switch controlling a charging current and a charging voltage applied to said battery; and operating said battery charger/inverter in a battery backup mode, wherein said first and second secondary switches are employed as an inverter to convert DC power from said battery to provide said backup power to said AC bus, said second charging switch boosting a voltage of said battery to a voltage of said AC bus. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A power plant, comprising:
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a primary power supply that provides primary power; an AC bus, coupled to an output of said primary power supply, that distributes AC power, including said primary power; a backup power supply that provides backup power to said AC bus for distribution thereby and includes a battery charger/inverter having first and second secondary switches and first and second charging switches, coupled to said AC bus and couplable to a battery, operable in; a normal mode, wherein said first and second secondary switches are employed as synchronous rectifiers to convert a portion of said primary power to charge said battery, said first charging switch controlling a charging current and a charging voltage applied to said battery, and a battery backup mode, wherein said first and second secondary switches are employed as an inverter to convert DC power from said battery to provide said backup power to said AC bus, said second charging switch boosting a voltage of said battery to a voltage of said AC bus; and at least one AC post-regulator circuit, coupled to said AC bus, that converts said AC power to provide regulated DC power to a load. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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Specification