Electromagnetic variable-reluctance sensor.

摘要

The invention relates to the field of electromagnetic transducers. The sensor according to the invention comprises an electric winding 2 mounted on a carcass 1 comprising a housing 5 in which are placed a permanent magnet and a pole piece. A resin 20 is injected between a cap 15 and the carcass. According to the invention, stopping walls (3, 16, 17) are formed on the carcass in order to prevent the winding 2 from being coated with the injected resin. Differential thermal expansions are thus prevented from breaking the wire of the winding. Application to the production of a speed sensor for a shaft or a wheel for a motor vehicle. <IMAGE>