Transformer system for power line communications
First Claim
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1. A system for coupling a communication device with a power line, comprising:
- a first transformer having a primary winding connected with the power line and a secondary winding connected with the communication device;
a second transformer having a primary winding connected in series with the primary winding of the first transformer and a secondary winding connected in parallel with the secondary winding of the first transformer;
a first capacitor connected in series with the secondary winding of the second transformer and in parallel with the secondary winding of the first transformer; and
a second capacitor connected in series with the primary winding of the second transformer and in parallel with the primary winding of the first transformer.
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Abstract
A transformer system couples a control panel with a power line to support two-way communications over the power line. A first transformer steps-down the power line voltage, supplying power to the control panel. A second transformer and associated capacitors provide a low impedance path at the communication signal frequencies and a high impedance path at the power frequency.
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Citations
8 Claims
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1. A system for coupling a communication device with a power line, comprising:
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a first transformer having a primary winding connected with the power line and a secondary winding connected with the communication device; a second transformer having a primary winding connected in series with the primary winding of the first transformer and a secondary winding connected in parallel with the secondary winding of the first transformer; a first capacitor connected in series with the secondary winding of the second transformer and in parallel with the secondary winding of the first transformer; and a second capacitor connected in series with the primary winding of the second transformer and in parallel with the primary winding of the first transformer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification