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US 10,096,995 B2Granted
Adaptive power control for energy harvesting
AssigneeTriune IP LLC
InventorsRoss E. Teggatz, Wayne T. Chen, Brett Smith
Life of this patent
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Abstract
Advances in the arts are disclosed with novel methods and circuit systems for controlling power in an energy harvesting system. Techniques and related systems for controlling power output of an energy harvesting device provide for monitoring at least one power parameter at a power source and monitoring at least one power parameter at a load such as a storage medium. The power source output is adjusted in order to optimize energy harvesting and/or storage based on real-time performance parameters.
Claims19
A circuit comprising:
- a photovoltaic cell;
- an integrator having a first input coupled to the photovoltaic cell, a second input coupled to a reference voltage, and an output;
- and
- a regulator having a conducting terminal coupled to the output of the integrator and a voltage regulated output regulated by the reference voltage;
- wherein the integrator is configured to adjust the reference voltage provided to the regulator in response to a voltage drop in the photovoltaic cell.
2 more elements
A circuit comprising:
- a photovoltaic cell;
- an integrator having a first input coupled to the photovoltaic cell, a second input coupled to a reference voltage, and an output;
- a first transistor having a control terminal and a first conducting terminal coupled to the output of the integrator and a second conducting terminal coupled to ground;
- a second transistor having a control terminal coupled to the control terminal of the second transistor, a first conducting terminal coupled to ground and a second conducting terminal coupled to an operational amplifier;
- a third transistor having a first conducting terminal coupled to the current source and a second conducting terminal coupled to the operational amplifier;
- a fourth transistor having a first conducting terminal coupled to a current source, a second conducting terminal coupled to the operational amplifier and a control terminal coupled to a control terminal of the third transistor;
- and
- a diode coupled to the operational amplifier and the fourth transistor;
- wherein the integrator is configured to adjust the reference voltage provided to the first conducting terminal of the first transistor in response to a voltage drop in the photovoltaic cell.
6 more elements
A circuit comprising:
- a photovoltaic cell;
- an integrator having a first input coupled to the photovoltaic cell, a second input coupled to a reference voltage, and an output;
- a capacitor having a first lead coupled to the first input of the integrator and a second lead coupled to the output of the integrator;
- a first transistor having a control terminal coupled to the output of the integrator, a first conducting terminal coupled to a current source and a second conducting terminal coupled to a fourth resistor;
- a regulator having a control terminal coupled to the current source and a voltage regulated output regulated by the reference voltage;
- wherein the first transistor is configured to adjust the reference voltage provided by the integrator to the regulator in response to a voltage change in the photovoltaic cell.
3 more elements
Dependencies are inferred from the claim text.