ebm-papst

About: ebm-papst is a company organization based out in Mulfingen, Germany. It is known for research contribution in the topics: Rotor (electric) & Stator. The organization has 572 authors who have published 736 publications receiving 3763 citations.

Ventilation system especially for a motor vehicle seat and headrest has air channel with small fan to flow air through channel

Abstract: A ventilation system, especially for a motor vehicle seat (2) comprises an air channel (11) with at least one small fan (12) to generate an air flow. The channel is formed at least in part of air channel sections (20) between which the small fans are placed. Independent claims are also included for the following: (a) a system as above integrated into a motor vehicle seat;and (b) a headrest with ventilation as above.

Electronically commutated outer rotor motor

Abstract: The outer rotor motor (20) has a bell-shaped external rotor that is separated by a magnetically effective air gap from a stator (162) and a rotor base (43). The external rotor is rotatably supported in a bearing tube. A rotor-near portion of bearing tube is extended in axial direction into the region of rotor base, while a rotor-distal portion is extended in axial direction away from the rotor-near portion. A flange is provided at rotor-distal portion of bearing tube. A sealing element is provided with a seal lip which is arranged between the flange and external rotor.

Radial-Lüfterrad-Anordnung

Abstract: Die vorliegende Erfindung betrifft eine Radial-Lufterrad-Anordnung, bestehend aus einer kreisformigen Bodenscheibe (2) und einer kreisformigen Deckscheibe (3) mit einer mittigen Einstromoffnung (4) sowie zwischen der Bodenscheibe (2) und der Deckscheibe (3) verlaufenden Radschaufeln (6). Auf mindestens einer der beiden Scheiben (2, 3) im Scheibenrandbereich ist mindestens ein Ausgleichgewicht (13) befestigt. Im Zwischenraum zwischen den Radschaufeln (6) im auseren Randbereich der Deckscheibe (3) und/oder der Bodenscheibe (2) sind zumindest einseitig in der Scheibenoberflache taschenformige Vertiefungen (9) ausgebildet. Im Bereich mindestens einer der taschenformigen Vertiefungen (9) ist zumindest ein Ausgleichgewicht (13) befestigt.

Back-EMF synthesis for sinusoidal and trapezoidal tooth-wound interior permanent magnet synchronous machines without skewing

Abstract: The paper presents back-EMF synthesis (design) techniques for both -sinusoidal and trapezoidal -permanent magnet synchronous machines (PMSM) technologies. One of the major original contributions is the fact that the introduced synthesis methods are taking into account the simultaneous cogging torque minimization. In comparison with the known machines with surface permanent magnets (PM), distributed windings and skewing, the present paper considers only machines with interior PM, concentrated windings (tooth-wound machines) and without skewing, as robust, low-cost solutions for the industrial practice. Several machine topologies are presented in comparison for the sinusoidal and trapezoidal technologies. The synthesis process involves exclusively nonlinear finite elements (FE) calculations of the back-EMF shape and cogging torque. For each machine technology design solutions with optimal back-EMF and low cogging torque are offered. Experimental (measurements) results for the built prototypes are presented in detail.