Isolated dynamic current converters
First Claim
1. A dynamic current apparatus of interfacing between a set of AC or DC power sources and loads comprising:
- a first converter comprising a first set of switches;
a transformer coupled to the first converter, wherein a DC magnetizing current in the transformer serving as an energy storage for transferring power is regulated to a reference value to compensate for losses; and
a second converter coupled to the transformer, the second converter comprising a second set of switches;
wherein an input of the first converter is an input of the dynamic current apparatus, an output of the second converter is an output of the dynamic current apparatus, a power flow between the first converter and the second converter is bi-directional.
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Accused Products
Abstract
Isolated Dynamic-Current (“Dyna-C”) converters are converters that convert incoming 3-phase AC or DC power to a mix of DC and AC power via an isolation link. In various embodiments, the isolation link is a high-frequency isolation transformer. Isolated Dyna-C converters may provide a high-frequency galvanic isolation and are able to convert three-phase AC power to three-phase AC power, or three-phase AC power to DC and vice versa. The topology is minimal and the costs are low. Isolated Dyna-C converters provide fast current responses and keep the losses low by using a simplified two-stage conversion and providing a magnetizing current that is dynamically controllable and tailored to the load. An isolated Dyna-C converter may synthesize currents at its input or output ports with an arbitrary phase that is relative to the grid or load voltages, thereby enabling a full independent control over the active and reactive power at its ports.
47 Citations
21 Claims
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1. A dynamic current apparatus of interfacing between a set of AC or DC power sources and loads comprising:
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a first converter comprising a first set of switches; a transformer coupled to the first converter, wherein a DC magnetizing current in the transformer serving as an energy storage for transferring power is regulated to a reference value to compensate for losses; and a second converter coupled to the transformer, the second converter comprising a second set of switches; wherein an input of the first converter is an input of the dynamic current apparatus, an output of the second converter is an output of the dynamic current apparatus, a power flow between the first converter and the second converter is bi-directional. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method of using a dynamic current apparatus, comprising:
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coupling the dynamic current apparatus to a power source; coupling the dynamic current apparatus to a load; wherein the dynamic current apparatus comprises; a first converter comprising a first set of switches; a transformer coupled to the first converter; and a second converter coupled to the transformer, the second converter comprising a second set of switches; wherein the first converter is coupled to the power source, and the second converter is coupled to the load, and a power flow between the first converter and the second converter is bi-directional; coupling a second dynamic current apparatus to the power source; and coupling the second dynamic current apparatus to the load; wherein the second dynamic current apparatus comprises a third converter coupled to a second transformer, and a fourth converter coupled to the second transformer, the third converter is coupled to the power source and the fourth converter is coupled to the load, the first converter and the third converter are coupled in parallel, and the second converter and the fourth converter are coupled in series. - View Dependent Claims (20)
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21. A method of using a dynamic current apparatus, comprising:
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coupling the dynamic current apparatus to a power source; and coupling the dynamic current apparatus to a load; wherein the dynamic current apparatus comprises; a first converter comprising a first set of switches; a transformer coupled to the first converter, wherein a DC magnetizing current in the transformer serving as an energy storage for transferring power is regulated to a reference value to compensate for losses; and a second converter coupled to the transformer, the second converter comprising a second set of switches; wherein the first converter is coupled to the power source, and the second converter is coupled to the load, and a power flow between the first converter and the second converter is bi-directional.
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Specification