Wireless power source

摘要

A wireless power transmission system includes a transmitting portion and a receiving portion. The transmitting portion includes an inductive coil as a transmitting antenna. The inductive coil will have 20-40 turns. A control circuit includes a field-effect transistor, a signal generator, and a capacitor with a resistor in parallel connection with the capacitor. The capacitor is typically a 1.5 microFarad Mylar® film capacitor. The resistor will be 2-4 ohms. The field-effect transistor may be a Metal Oxide Semiconductor Field Effect Transistor (MOSFET). The receiving unit has at least one loop stick antenna located at a distance from a center of the coil of up to twice a diameter of the coil. The circuit is tunable between 6 kHz and 10 kHz. 8 kHz has been found to be optimal. The inductive transmitting coil is closely coupled. The loop stick antennae of the receiving portion may have an iron core or a ferrite core.

主权项

1. A wireless power transmission system comprising:
a transmitting unit, said transmitting unit comprising:
an inductive coil, said inductive coil serving as a transmitting antenna;a circuit comprising a field-effect transistor, a signal generator, and acapacitor with a resistor in parallel connection with the capacitor, saidcircuit being tunable between 6 khz and 10 khz; and a receiving unit, said receiving unit having at least one loop stick antenna disposed at a distance from a center of said coil of up to twice a diameter of said coil.