Hand-held inductive charger having concentric windings

Details Hand-held inductive charger having concentric windings Hand-held inductive charger having concentric windings

1992-01-22

1994-07-05

Hickey, R. J.

Electricity: battery or capacitor charging or discharging

Serially connected batteries or cells

With discharge of cells or batteries

336DIG2, H02J 700

Patent

active

053270657

ABSTRACT:
A hand-held inductive charger having concentric windings for transferring electrical power across a dielectric medium using magnetic induction. The charger comprises a removable primary coil assembly having a housing with a primary core disposed therein, and a primary winding protruding from the primary core. An electrical cable coupled to the primary winding that is adapted to couple power thereto from a power source. A secondary coil assembly having a receptacle housing is also provided, and a secondary core is disposed in the receptacle housing, and first and second concentric secondary windings are disposed in the secondary core. The first and second concentric secondary windings are coupled to a battery of an automobile. The first and second concentric secondary windings have a gap therebetween that is adapted to receive the primary winding therein. The primary and secondary coil assemblies form a transformer when their respective windings are mated. The charger allows an electric vehicle to be charged safely without any type of conventional electrical plug. The charger thus provides a safe, convenient and weatherproof mechanism for coupling power from a voltage source to an electric vehicle to recharge its propulsion battery. Approximately 6000 watts has been transferred through an embodiment of the charger having a volume of 25.8 cubic inches, yielding a power density of 230 Watts/cubic inch.

REFERENCES:
patent: 3105929 (1963-10-01), Blue
patent: 3641336 (1972-02-01), Boin
patent: 3867950 (1975-02-01), Fischell
patent: 3885211 (1975-05-01), Gutai
patent: 3996543 (1976-12-01), Conner et al.
patent: 4031449 (1977-06-01), Trombly
patent: 4397055 (1983-08-01), Cuchiara
patent: 4656412 (1987-04-01), McLyman
patent: 5264776 (1993-11-01), Hulsey

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