Power converter topologies for better traction drive packaging
First Claim
1. A current source power converter topology comprising:
- an electric load;
a stiff current source to power the electric load, wherein the stiff current source includesa voltage source,an inductor,a first switch, anda second switch, wherein each of the first and the second switches alternate between alternating open and closed positions and cooperate with the voltage source and further with the inductor to deliver a stiff but controllable current to the load;
a driver associated with the electric load having power electronics disposed therewithin to drive the electric load; and
at least one capacitor coupled to the load and to the power electronics to prevent transients from damaging the current source power converter.
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Abstract
At least three alternative stiff current supply power converter topologies provide fixed current to a respective electric load such as a motor, or a non-inductive electric load using either a current source or a pseudo current source. The stiff current power converter topologies reduce the size of passive components within each of the topologies, thus reducing the overall packaging of each of the components and subsystems formed by each of the components. Each of the topologies have a stiff current source, a driver having power electronics formed therein to drive the associated electric load, wherein the stiff current source and the driver operate to deliver a stiff but controllable current to the electric load.
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Citations
16 Claims
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1. A current source power converter topology comprising:
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an electric load; a stiff current source to power the electric load, wherein the stiff current source includes a voltage source, an inductor, a first switch, and a second switch, wherein each of the first and the second switches alternate between alternating open and closed positions and cooperate with the voltage source and further with the inductor to deliver a stiff but controllable current to the load; a driver associated with the electric load having power electronics disposed therewithin to drive the electric load; and at least one capacitor coupled to the load and to the power electronics to prevent transients from damaging the current source power converter. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A pseudo current source power converter topology comprising:
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an electric load; a pseudo current source to power the electric load formed from a voltage source, a first capacitor in parallel with the voltage source, and an inductor coupled in series with the voltage source and further in series with the first capacitor wherein the inductor operates to hold a current delivered to the electric load stiff but controllable; and a driver associated with the electric load having power electronics disposed therewithin to drive the electric load, wherein the power electronics has an associated first and a second switch and a second capacitor wherein when the first and second switches alternate between alternating open and closed positions and cooperate with the voltage source, the first capacitor, and the inductor to charge the second capacitor. - View Dependent Claims (9, 10, 11)
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12. A pseudo current source power converter topology comprising:
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a battery formed from a voltage source having first capacitor connected in parallel with the voltage source, wherein the battery is packed within an associated first package; an inductor coupled in series with the battery, wherein the inductor operates to hold a current delivered to an electric load constant, and wherein the inductor is in communication with the battery and is packaged within a second package; and combination electric load and driver associated with the electric load packaged within a third package, wherein the driver has power electronics disposed therewithin to drive the electric load, and wherein the power electronics has an associated first and second switch, and a second capacitor wherein when the first and second switches alternate between alternating open and closed positions and cooperate with the voltage source, the first capacitor and the inductor to charge the second capacitor, wherein the electric load is packed within a third package in combination with the driver. - View Dependent Claims (13, 14, 15, 16)
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Specification