Integrated AC/DC and DC/DC converter
First Claim
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1. A power converter for starting an AC machine, comprising:
- at least one transformer for stepping-up AC source voltages;
at least one rectifier for rectifying output voltages from said at least one transformer;
a three phase inverter for inverting rectified voltages from said at least one rectifier for providing three phase voltages for starting said AC machine; and
a DC to AC converter for convening DC source voltage to AC inverted voltages, wherein said three phase voltages for starting said AC machine are derived from one of said AC and DC source voltages through said at least one transformer and said at least one rectifier.
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Abstract
In an illustrative embodiment, a power converter for starting an AC machine comprises at least one transformer for stepping-up AC source voltages, at least one rectifier for rectifying output voltages from the at least one transformer, a three phase inverter for inverting rectified voltages from the at least one rectifier for providing three phase voltages for starting the AC machine, and a DC to AC converter for converting DC source voltage to AC inverted voltages. The three phase voltages for starting the AC machine are derived from one of the AC and DC source voltages through the at least one transformer and the at least one rectifier.
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Citations
20 Claims
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1. A power converter for starting an AC machine, comprising:
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at least one transformer for stepping-up AC source voltages; at least one rectifier for rectifying output voltages from said at least one transformer; a three phase inverter for inverting rectified voltages from said at least one rectifier for providing three phase voltages for starting said AC machine; and a DC to AC converter for convening DC source voltage to AC inverted voltages, wherein said three phase voltages for starting said AC machine are derived from one of said AC and DC source voltages through said at least one transformer and said at least one rectifier. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A power converter, comprising:
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a transformer having a plurality of first primary windings each adapted to receive one of a plurality of first AC input voltages of a polyphase AC voltage source, a plurality of second primary windings each adapted to receive one of a plurality of second AC input voltages, and a plurality of secondary windings, wherein transformer output voltages are provided across at least a common one of said secondary windings when either said first or second AC input voltages are applied to the respective primary windings in first or second operating modes, respectively; an input inverter for generating said second AC input voltages in a polyphase relationship to each other from a DC source; and a common rectifier for rectifying the transformer output voltages across said common secondary windings, whereby said power converter provides a DC output in each of said operating modes. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A power converter, comprising:
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a transformer having three first primary windings each adapted to receive one of three first AC input voltages of a three phase AC voltage source in a first operating mode, six second primary windings each connected to another of said second primary windings in a push-pull configuration to form three pairs of second primary windings, with each pair receiving one of three second AC input voltages applied across that pair of windings in a second operating mode, and six secondary windings, each of said secondary windings being wound on a magnetic core common to at least one of said first primary windings and at least one of said second primary windings, wherein transformer output voltages are provided across each of said secondary windings when either said first or second AC input voltages are applied to the respective primary windings in said first or second operating modes, respectively; an input inverter for generating said second AC input voltages in a three phase relationship to each other from a DC source; and a common rectifier for rectifying the transformer output voltages across said secondary windings, whereby said power converter provides a DC output in each of said operating modes. - View Dependent Claims (18, 19, 20)
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Specification