Advanced energy management
First Claim
Patent Images
1. A system adapted to regulate output voltage of a supply bus, the system comprising:
- a source having an internal impedance adapted to supply a source current to the supply bus;
a load adapted to draw a load current from the supply bus;
an energy storage device;
a bi-directional voltage to current converter connected to the supply bus adapted to provide an output current, wherein the output current is at least partly based on the source current and the load current; and
a reference current generation circuitry including a first summing node adapted to receive a reference voltage and a voltage provided by the energy storage device and generate an output signal based at least partly on a difference between the reference voltage and the voltage provided by the source;
a power inverter to receive the output signal from the first summing node;
a second summing node adapted to receive an output signal from the power inverter and an average supply current, and generate an output signal representing total source current based at least partly on a sum of the received output signal from the first summing node and the average supply current; and
a third summing node adapted to receive the output signal from the second summing node and the load current, and generate a reference current based at least partly on a difference between the load current and the output signal received from the second summing node.
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Abstract
A system adapted to regulate a voltage of a supply bus is described. The system includes a source adapted to supply a source current to the supply bus, a load adapted to draw a load current from the supply bus, and a bi-directional voltage to current converter adapted to provide an output current, where the output current is at least partly based on the source current and the load current.
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Citations
17 Claims
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1. A system adapted to regulate output voltage of a supply bus, the system comprising:
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a source having an internal impedance adapted to supply a source current to the supply bus; a load adapted to draw a load current from the supply bus; an energy storage device; a bi-directional voltage to current converter connected to the supply bus adapted to provide an output current, wherein the output current is at least partly based on the source current and the load current; and a reference current generation circuitry including a first summing node adapted to receive a reference voltage and a voltage provided by the energy storage device and generate an output signal based at least partly on a difference between the reference voltage and the voltage provided by the source;
a power inverter to receive the output signal from the first summing node;
a second summing node adapted to receive an output signal from the power inverter and an average supply current, and generate an output signal representing total source current based at least partly on a sum of the received output signal from the first summing node and the average supply current; and
a third summing node adapted to receive the output signal from the second summing node and the load current, and generate a reference current based at least partly on a difference between the load current and the output signal received from the second summing node. - View Dependent Claims (2, 3)
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4. A bi-directional voltage to current converter comprising:
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an inductor coupled to a first line of a supply bus; a set of switches adapted to connect the inductor in series with an energy storage device; a pulse-width modulation (PWM) controller adapted to control the operation of the set of switches; and a reference current generation circuitry including a first summing node adapted to receive a reference voltage and a voltage provided by the energy storage device and generate an output signal based at least partly on a difference between the reference voltage and a voltage provided by a source;
a power inverter to receive the output signal from the first summing node;
a second summing node adapted to receive an output signal from a power inverter and an average supply current, and generate an output signal representing total source current based at least partly on a sum of the received output signal from the first summing node and the average supply current; and
a third summing node adapted to receive the output signal from the second summing node and a load current, and generate a reference current based at least partly on a difference between the load current and the output signal received from the second summing node. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method adapted to provide a set of gate driver outputs for a pulse width modulation (PWM) controller, the method comprising:
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retrieving a PWM period associated with the PWM controller; determining a reference current associated with a source and a load coupled to a supply bus; calculating a duty cycle based at least partly on the retrieved PWM period and the received reference current; generating the set of gate driver outputs based at least partly on the calculated duty cycle; and providing a reference current generation circuitry including a first summing node adapted to receive a reference voltage and a voltage provided by the energy storage device and generate an output signal based at least partly on a difference between the reference voltage and a voltage provided by a source;
a power inverter to receive the output signal from the first summing node;
a second summing node adapted to receive an output signal from a power inverter and an average supply current, and generate an output signal representing total source current based at least partly on a sum of the received output signal from the first summing node and the average supply current; and
a third summing node adapted to receive the output signal from the second summing node and a load current, and generate a reference current based at least partly on a difference between the load current and the output signal received from the second summing node. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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Specification