Magnetic shield system for electric cars
AssigneeHitachi, Ltd.
InventorsKorefumi Tashiro, Kosuke Ishikawa
Life of this patent
Estimating the term…
Abstract
In an electric car comprising a car body and a plurality of electric devices separately arranged on the undercarriage according to their functions, a magnetic shield system in which the plurality of electric devices are electrically connected through wires adjacent ones of which conduct substantially the same magnitude of current flowing in opposite directions.
Claims7
A magnetic shield system for an electric car comprising:
- a car body;
- a plurality of electrical devices arranged on the underside of the floor of said car body;
- means including electric wires for electrically connecting said electrical devices according to their functions;
- those of said electric wires through which currents of substantially the same magnitude flow in opposite directions being closely located to each other;
- and
- tube means made of magnetic material for magnetically shielding said those electric wires.
In a electric car having a car body with a plurality of electrical control elements arranged beneath the floor of the car body and pairs of electric wires interconnecting associated ones of said control elements in accordance with the control functions performed thereby, the improvement comprising a magnetic shielding system for preventing signal devices located along tracks upon which said electric car travels from being erroneously operated by magnetic fluxes produced by current flowing in said electric wires, wherein those electric wires of each respective pair through which currents of substantially the same magnitude flow in opposite directions are disposed adjacent to each other and are enveloped by tubes of magnetic material for magnetically shielding those electric wires.
Dependencies are inferred from the claim text.