Electrical appliance with reduced electric field emissions

Details Electrical appliance with reduced electric field emissions Electrical appliance with reduced electric field emissions

1995-04-06

1996-04-09

Wong, Peter S.

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

307141, 307142, 439133, 439373, 174103, H04N 544

Patent

active

055064558

ABSTRACT:
An electrical appliance comprises a power supply cable (70) having a first conductor (200) surrounded by a second conductor (210) for supplying electrical power to the appliance from a domestic electricity mains supply, and a connector (490) connected to cable for detachably connecting the conductors of the cable to first and second voltage signals of the electricity mains supply. In operation, the second conductor (210) is connected to the lower of the voltage signals. The second conductor (210) thus acts as a shield in opposition to electric fields radiating from the cable. The shield improves in efficiency as the lower mains voltage signal approaches Ground potential.

REFERENCES:
patent: 3649742 (1972-03-01), Tissot
patent: 4285022 (1981-08-01), Lewiner et al.
patent: 5150442 (1992-09-01), Desmons
patent: 5231310 (1993-07-01), Oh
IEEE Transactions on Industry Applications, vol. 25, No. 6, Dec. 1989 New York, US, pp. 1093-1101 XP000113006, Warren H. Lewis `The Use and Abuse of Insulated/Isolated Grounding`.
IRE Wescon Convention Record, vol., 34, Nov. 1990, North Hollywood, US pp. 719-720 XP000227945, Ronald D. Baney `Cost Effective Noise Reduction in Power Supplies`.

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