Powerline communicated load control
First Claim
1. A system for transmitting communication signals, the system comprising:
- an injector circuit connected to a powered circuit conductor and configured to modulate an AC power signal with a time sequence of instantaneous voltage offsets over at least a portion of a voltage phase to produce one or more bits to be transmitted on the powered circuit conductor,wherein the one or more bits form a command, andwherein the injector circuit includes one or more asymmetrical networks that modulate the power signal with the instantaneous voltage offset, the instantaneous voltage offset having a first voltage offset for modulating a first polarity of the power signal and a second voltage offset for modulating a second polarity of the power signal, the first voltage offset being different than the second voltage offset; and
a decoder connected to the powered circuit conductor and a load, the decoder configured to demodulate the instantaneous voltage offsets to extract the command to control the load based on a selected control scheme.
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Accused Products
Abstract
A system for transmitting communication signals, the system comprising an injector circuit connected to a powered circuit conductor and configured to modulate a power signal with a direct current voltage offset, the direct current voltage offset being within a range that causes approximately 1 percent or less total harmonic distortion of the power signal; and a decoder connected to the powered circuit conductor and a load, the decoder configured to demodulate the direct current voltage offset to control the load. A method for transmitting communication signals, the method comprising modulating a power signal on a powered circuit conductor with a direct current voltage offset, the direct current voltage offset being within a range that causes approximately 1 percent or less total harmonic distortion of the power signal; and demodulating the direct current voltage offset to control a load.
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Citations
28 Claims
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1. A system for transmitting communication signals, the system comprising:
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an injector circuit connected to a powered circuit conductor and configured to modulate an AC power signal with a time sequence of instantaneous voltage offsets over at least a portion of a voltage phase to produce one or more bits to be transmitted on the powered circuit conductor, wherein the one or more bits form a command, and wherein the injector circuit includes one or more asymmetrical networks that modulate the power signal with the instantaneous voltage offset, the instantaneous voltage offset having a first voltage offset for modulating a first polarity of the power signal and a second voltage offset for modulating a second polarity of the power signal, the first voltage offset being different than the second voltage offset; and a decoder connected to the powered circuit conductor and a load, the decoder configured to demodulate the instantaneous voltage offsets to extract the command to control the load based on a selected control scheme. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for transmitting communication signals, the system comprising:
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an injector circuit connected to a powered circuit conductor and configured to modulate an AC power signal with a time sequence of instantaneous voltage offsets over at least a portion of a voltage phase to produce one or more bits to be transmitted on the powered circuit conductor, wherein the one or more bits form a command, and wherein the injector circuit includes a first asymmetrical network and a second asymmetrical network, the first asymmetrical network configured to modulate the power signal with the instantaneous voltage offset to produce a first average voltage offset in a first polarity of the power signal, and the second asymmetrical network configured to modulate the power signal with the instantaneous voltage offset to produce a second average voltage offset in a second polarity of the power signal, the first average voltage offset being opposite to the second average voltage offset; and a decoder connected to the powered circuit conductor and a load, the decoder configured to demodulate the instantaneous voltage offsets to extract the command to control the load based on a selected control scheme. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for transmitting communication signals, the method comprising:
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modulating a power signal on a powered circuit conductor with a time sequence of instantaneous voltage offsets over at least a portion of a voltage phase, to produce one or more bits to be transmitted on the powered circuit conductor, the instantaneous voltage offset having a first voltage offset for modulating a first polarity of the power signal and a second voltage offset for modulating a second polarity of the power signal, the first voltage offset being different than the second voltage offset, wherein the one or more bits form a command; and demodulating the instantaneous voltage offsets to extract the command to control a load. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28)
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Specification