H - Electricity – 04 – B
Patent
H - Electricity
04
B
340/79, 317/9
H04B 3/44 (2006.01) H04B 3/54 (2006.01)
Patent
CA 1082329
POWER SUPPLY FOR POWER LINE CARRIER COMMUNICATION SYSTEMS ABSTRACT OF THE DISCLOSURE Apparatus for powering a signal amplifier or repeater connected to the primary or high-voltage portion of a power distribution system. Oscillator and amplifier circuits are energized by power from the secondary or low-voltage portion of the power distribution system. The oscillator and ampli- fier circuits are connected to the primary winding of an air- core transformer. A capacitor is also connected to the primary winding to make the primary circuit of the air-core transformer resonant at the frequency of the oscillator. The secondary winding of the air-core transformer is connected to a reson- ating capacitor and to transformer and rectifier circuits which convert the AC voltage into DC voltage for powering the signal amplifier. Electrical isolation between the high- voltage and low-voltage portions of the distribution system is provided by the separation distance between the primary and secondary windings of the air-core transformer. Sufficient electrical energy is transferred between the primary and secondary windings of the air-core transformer by energizing the primary winding with a high-frequency voltage from the oscillator and amplifier circuits. The mutual inductance between the primary and secondary windings of the air-core transformer is low enough to permit reasonably efficient power transfer when the oscillator and amplifier circuits operate at high frequencies.
262768
Mcconnell And Fox
Westinghouse Electric Corporation
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