Method and apparatus for generating linear electromagnetic travelling fields for driving and increasing the adhesive load of railway motored vehicles

摘要

An electrical apparatus is disclosed to increase the adhesive load per driving axle and therefore the corresponding permissible tractive and braking forces per driving axle of locomotives and motor- coaches which travel on rails and to contribute directly to the over-all tractive force or braking force of such vehicles. In one configuration the electrical apparatus includes a system of linear inductors for generating travelling magnetic fields in the rails, the inductors including a double sequence of conjugate poles, the lines of force of which pass transversely through the upper flange of the rail. In another configuration, the electrical apparatus includes both a system of linear inductors for generating, in the rails, a magnetic field, travelling or fixed, and a conjugate system of electrical brushes for injecting, in the rails, electrical currents in controlled relationship with the magnetic field.