Ebm-papst St. Georgen Gmbh & Co Kg

Ims Connector Systems Gmbh

Volker Rombach

Frank Roese

Roland Baumgaertner

A novel electric motor rotor structure, particularly desirable for use with brittle rare-earth-magnets, offers improved resistance to rattling and axial shifting. This is achieved by forming the rotor with an annular central yoke connecting to a plurality of pole shoes along the periphery of the rotor and defining a magnet-receiving recess or pocketbetween each pole shoe and the central yoke. Spaced circumferentially between adjacent magnetsare regionsof reduced magnetic conductivity, which include relatively thin metallic holding segments, which connect adjacent pole shoes to each other and to the central yoke. During manufacturing, tools are applied to upset or crimp the holding segments, and thereby form spring elements, to hold the magnets in stable positions and resist any tendency of the magnets to rattle or axially shift during motor operation. One obtains the same power level from a smaller, and therefore lighter, motor than was previously possible.

Electric motor

A plug connector has a U-shaped snap-on clip with a web, which incorporates a contact lug. The web is seated in a slot of the casing. A contact is situated at the end of the U-shaped snap-on clip, between its arms. An opening for inserting a contact pin is situated in the top side of the housing. This contact pin spreads the arms of the U-shaped snap-on clip, so that they detach from the contact. This plug connector, which is especially suited for use in a cordless radiotelephone, is distinguished by a small structural size, low production costs, a small number of components, high contact reliability, and an especially low juncture resistance.

Growing community of inventors

Furtwangen, Germany

Volker Rombach