Method and system for transferring a load between AC voltage sources
First Claim
1. A method of transferring a load from an initial voltage source to a final voltage source, the load being initially connected to the initial voltage source, comprising the steps of:
- (a) connecting a temporary voltage source to the load;
(b) subsequent to said connecting of said temporary voltage source to the load, disconnecting the initial voltage source from the load;
(c) subsequent to said disconnecting of said initial voltage source from the load, connecting the final voltage source to the load; and
(d) subsequent to said connecting of the final voltage source to the load, disconnecting said temporary voltage source from the load;
wherein a duration of a connection of said temporary voltage source to the load is substantially shorter than a duration of a connection of the initial voltage source to the load, and wherein said duration of said connection of said temporary voltage source to the load is substantially shorter than a duration of the final voltage source to the load.
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Abstract
A method and system for transferring a load from a first AC voltage source to a second AC voltage source. A temporary voltage source is connected to the load and to the first voltage source via a resistor. The first voltage source is disconnected from the load. The second voltage source is connected to the load. Finally, the temporary voltage source is disconnected from the load. The temporary voltage source may be independent of the first and second voltage sources, or may obtain voltage from the first or second voltage sources. The connecting and disconnecting is done by mechanical switches, by thyristors, or by mechanical switches and thyristors in parallel or in series.
28 Citations
14 Claims
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1. A method of transferring a load from an initial voltage source to a final voltage source, the load being initially connected to the initial voltage source, comprising the steps of:
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(a) connecting a temporary voltage source to the load; (b) subsequent to said connecting of said temporary voltage source to the load, disconnecting the initial voltage source from the load; (c) subsequent to said disconnecting of said initial voltage source from the load, connecting the final voltage source to the load; and (d) subsequent to said connecting of the final voltage source to the load, disconnecting said temporary voltage source from the load; wherein a duration of a connection of said temporary voltage source to the load is substantially shorter than a duration of a connection of the initial voltage source to the load, and wherein said duration of said connection of said temporary voltage source to the load is substantially shorter than a duration of the final voltage source to the load. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification