Ferroresonant transformer for use in uninterruptible power supplies
First Claim
1. A ferroresonant transformer adapted to be connected to a primary power source, an inverter system, and a resonant capacitor, the ferroresonant transformer comprising:
- a core;
a main shunt arranged to define a primary side and a secondary side of the ferroresonant transformer;
first windings arranged on the primary side of the ferroresonant transformer;
second windings arranged on the secondary side of the ferroresonant transformer; and
third windings arranged on the secondary side of the ferroresonant transformer;
whereinthe first windings are configured to be operatively connected to the primary power source;
the second windings are configured to be operatively connected to the inverter system; and
the third windings are configured to be directly connected to the resonant capacitor.
3 Assignments
0 Petitions
Accused Products
Abstract
A ferroresonant transformer is adapted to be connected to a primary power source, an inverter system, and a resonant capacitor. The ferroresonant transformer comprises a core, a main shunt arranged to define a primary side and a secondary side of the ferroresonant transformer, first windings arranged on the primary side of the ferroresonant transformer, second windings arranged on the secondary side of the ferroresonant transformer, and third windings arranged on the secondary side of the ferroresonant transformer. The first windings are operatively connected to the primary power source.
195 Citations
18 Claims
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1. A ferroresonant transformer adapted to be connected to a primary power source, an inverter system, and a resonant capacitor, the ferroresonant transformer comprising:
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a core; a main shunt arranged to define a primary side and a secondary side of the ferroresonant transformer; first windings arranged on the primary side of the ferroresonant transformer; second windings arranged on the secondary side of the ferroresonant transformer; and third windings arranged on the secondary side of the ferroresonant transformer;
whereinthe first windings are configured to be operatively connected to the primary power source; the second windings are configured to be operatively connected to the inverter system; and the third windings are configured to be directly connected to the resonant capacitor. - View Dependent Claims (2, 3)
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4. An uninterruptible power supply system adapted to be connected to a primary power source, a battery system, and a load, the uninterruptible power supply comprising:
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a ferroresonant transformer comprising a core; a main shunt arranged relative to the core to define a primary side and a secondary side of the ferroresonant transformer; first windings arranged on the primary side of the ferroresonant transformer; second windings arranged on the secondary side of the ferroresonant transformer; and third windings arranged on the secondary side of the ferroresonant transformer; and an inverter, where the inverter is operatively connected to the second windings; a resonant capacitor, where the resonant capacitor is operatively connected to the third windings; and a select switch; wherein the first windings are operatively connected to the primary power source; the inverter is operatively connected to the battery system; the resonant capacitor is operatively connected to the load; in a line mode, power flows from the primary source to the load through the ferroresonant transformer; and in a standby mode, power flows from the inverter to the load through the ferroresonant transformer, where the select switch is configured to disconnect the reasonant capacitor from the third windings when the uninterruptible power supply is in the standby mode. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method of supplying power to a load based on an AC power signal and a DC power signal, the method comprising the steps of:
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forming a ferroresonant transformer by arranging a main shunt relative to a core to define a primary side and a secondary side of the ferroresonant transformer; arranging first windings on the primary side of the ferroresonant transformer; arranging second windings on the secondary side of the ferroresonant transformer; arranging third windings on the secondary side of the ferroresonant transformer; operatively connecting the inverter to the second windings; and operatively connecting a resonant capacitor to the third windings; operatively connecting the load to the resonant capacitor; supplying power to the load through the ferroresonant transformer based on the AC power signal in a line mode; operating the inverter based on the DC power signal to provide power to the load through the ferroresonant transformer in a standby mode; and disconncecting the reasonant capacitor from the third windings when the uninterruptible power supply is in the standby mode. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of supplying power to a load based on an AC power signal and a DC power signal, the method comprising the steps of:
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forming a ferroresonant transformer by arranging a main shunt relative to a core to define a primary side and a secondary side of the ferroresonant transformer; arranging first windings on the primary side of the ferroresonant transformer; arranging second windings on the secondary side of the ferroresonant transformer; arranging third windings on the secondary side of the ferroresonant transformer; operatively connecting the inverter to the second windings; operatively connecting a filter capacitor across at least a portion of the third windings; operatively connecting a resonant capacitor to the third windings; operatively connecting the load to the resonant capacitor; supplying power to the load based on the AC power signal in a line mode; operating the inverter based on the DC power signal to provide power to the load in a standby mode; and disconnecting the reasonant capacitor from the third windings when the uninterruptible power supply is in the standby mode.
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Specification