Multi-sectioned power converter having current-sharing controller
First Claim
1. An interleaved power converter system comprising:
- a power bus having a first node coupled to a source of power and a second node coupled to a load; and
a plurality N of power converter slices connected in parallel with said power bus for providing current thereto, each of said slices providing approximately of a total amount of current flowing through said power bus, each of said slices comprising,at least one switch coupled to said power bus;
an inductance having a first terminal coupled to said at least one switch and a second terminal coupled to said power bus; and
control means having an output for controlling the opening and closing of said at least one switch to control an amount of current that flows through said inductance as a function of a difference between (a) a first signal that represents a magnitude of a voltage potential of said power bus and (b) a second signal that represents a combination of a magnitude of an average current flowing through said power bus and a magnitude of a peak current flowing through the inductance.
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Accused Products
Abstract
An interleaved power converter is constructed so as to substantially equalize the power output of individual converter slices or phases. In an embodiment of the invention an interleaved power control system (110) includes a power bus (114) having a battery (116) coupled thereto and a plurality of slices (112) operating in a phased relationship with one another for causing the battery to source current to the power bus or to sink current from the power bus. Each of the slices includes an inductor (L) that is switchably coupled to the power bus and a controller (146) for controlling the switching of the inductor. The switching of the inductor is controlled as a function of (a) a difference between a magnitude of a voltage potential (VB) of the power bus and a predetermined voltage potential magnitude (Voltage Setpoint); (b) a difference between a magnitude of a current flowing through the power bus (IT) and a predetermined current magnitude (Charge Current Setpoint); and (c) a signal that indicates both of (i) a predetermined proportion of a total amount of current that the power converter system is supplying and, (ii) a magnitude of a peak current flowing through the inductor.
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Citations
20 Claims
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1. An interleaved power converter system comprising:
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a power bus having a first node coupled to a source of power and a second node coupled to a load; and a plurality N of power converter slices connected in parallel with said power bus for providing current thereto, each of said slices providing approximately of a total amount of current flowing through said power bus, each of said slices comprising, at least one switch coupled to said power bus; an inductance having a first terminal coupled to said at least one switch and a second terminal coupled to said power bus; and control means having an output for controlling the opening and closing of said at least one switch to control an amount of current that flows through said inductance as a function of a difference between (a) a first signal that represents a magnitude of a voltage potential of said power bus and (b) a second signal that represents a combination of a magnitude of an average current flowing through said power bus and a magnitude of a peak current flowing through the inductance. - View Dependent Claims (2, 3)
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4. An interleaved power converter system comprising:
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a power bus having a battery coupled thereto; a plurality of inductors each of which is switchably coupled between a system ground and said power bus; and a plurality of control means individual ones of which control the switching of an individual one of said inductors as a function of (a) a magnitude of a voltage potential of said power bus;
b) a magnitude of an average current flowing through said power bus; and
(c) a signal that indicates a magnitude of a peak current flowing through the individual one of the inductors. - View Dependent Claims (5, 6, 7, 8)
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9. An interleaved power converter system comprising:
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a power bus having a battery coupled thereto; and a plurality of slices operating in a phased relationship with one another for causing said battery to source current to said power bus or to sink current from said power bus, each of said slices comprising, an inductor that is switchably coupled between a system ground and said power bus; and control means for controlling the switching of said inductor as a function of (a) a difference between a magnitude of a voltage potential of said power bus and a predetermined voltage potential magnitude;
(b) a difference between a magnitude of a current flowing through said power bus and a predetermined current magnitude; and
(c) a signal that indicates both of (i) a predetermined proportion of a total amount of current that said power converter system is supplying and, (ii) a magnitude of a current flowing through the inductor. - View Dependent Claims (10, 11, 12, 13, 14)
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15. A satellite comprising:
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a power bus having a battery coupled thereto; at least one solar array coupled to said power bus; and an interleaved bilateral power converter system comprised of a plurality of slices operating in a phased relationship with one another for causing said battery to source current to said power bus or to sink current from said power bus, each of said slices comprising, an inductor that is switchably coupled between a system ground and said power bus; and control means for controlling the switching of said inductor as a function of (a) a difference between a magnitude of a voltage potential of said power bus and a predetermined voltage potential magnitude;
(b) a difference between a magnitude of an average current flowing through said power bus and a predetermined current magnitude; and
(c) a signal that indicates both of (i) a predetermined proportion of a total amount of current that said power converter system supplying and, (ii) a magnitude of a peak current flowing through the inductor. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification