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.

Vorrichtung zur Vermeidung von schädlichen Lagerströmen

Abstract: Die vorliegende Erfindung betrifft eine Vorrichtung zur Reduzierung und/oder zur Vermeidung von schadlichen Lagerstromen in einer elektrischen Maschine (M), wie vorzugsweise einem dreiphasigen EC-Motor (M), mit einem Rotor (2) und mit einem isoliert aufgebauten Stator (3), wobei zwischen Rotor (2) und Stator (3) wenigstens ein Lageraussenring (4a) und ein Lagerinnenring (4b) vorgesehen ist, umfassend eine Anschlusselektronik (10) zum Anschluss des Motors (M), wobei der Stator (3) durch eine elektrische Verbindung (20) mit einem hochfrequent gegenuber dem Erdpotential (UE) verschiedenen und gegenuber diesem stabilen Elektronikpotential (11) an einem Potentialabgriff (20a) der Anschlusselektronik (10) verbunden ist.

System to increase the in-line power factor of a three-phase brushless DC motor

Abstract: The present invention relates to a control system and a method for raising the mains-side power factor A of three-phase fed EC motors having a dc voltage intermediate circuit ( 2 ) with an intermediate center tap (DCM) for generating a positive and a negative intermediate circuit potential (DC+, DC−), comprising three active bridge arms (Ia, IIa, IIIa), each of which are connected to a subordinate two-point current control (ZPR 1, ZPR 2, ZPR 3 ) and, in each case, via said current control to a superimposed intermediate circuit voltage control ( 3 ), which controls the potential difference between the middle circuit potentials (DC+, DC−) via set point settings for the subordinate two-point current controllers (ZPR 1, ZPR 2, ZPR 3 ).

Stator mit angepasster zahngeometrie

Abstract: Die Erfindung betrifft einen Stator eines Elektromotors mit in Umfangsrichtung verteilten, sich in radialer Richtung erstreckenden Zahnen und jeweils zwischen den Zahnen vorgesehenen Nuten, wobei jeweils benachbarte Zahne an ihren radialen Ausenrandabschnitten jeweils eine Nutoffnung bilden, und die radialen Ausenrandabschnitte der Zahne jeweils einen sich in Umfangsrichtung in die Nutoffnung erstreckenden Vorsprung aufweisen, der jeweils eine nach radial innen gerichtete freie Anlageflache bildet.

Single-piece fan wheel

Abstract: The invention relates to a blower wheel (1) in a one-piece design having a bottom disk (12) and a cover disk (11) between which a blade ring is formed having multiple blower wheel blades (13) disposed in the circumferential direction at a spacing from one another, wherein the bottom disk (12) defines a maximum radial diameter da and the cover disk (11) forms an axial intake opening (25) having a diameter di, wherein the cover disk (11) extends radially outwards from the circumferential edge (14) which forms the intake opening (25) and has a maximum outer diameter dt, and wherein an outer diameter ratio dt/da is defined in a range from 0.6 to 0.8.

Axial or diagonal fan with trip edge on the rotor blade suction side

Abstract: The invention relates to an axial or diagonal fan which has a rotor (34) that is provided with profiled rotor blades (32). Each said rotor blade has a suction side (46), a portion which lies at the front when seen in the rotational direction (36) and which comprises a leading edge (44), and a portion which lies at the rear when seen in the rotational direction (36) and which comprises a trailing edge (92). A separation edge (66) is provided between said two portions on the suction side (46) of the respective blade (32), said separation edge having an S-shaped contour in a meridian cross-section.