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.

Fan rotor and fan, particularly a radial fan

Abstract: A ventilator fan unit has a housing at the centre of which is an electric motor with an upright shaft. In plan view the housing has a ring-shaped outer panel which translates at approx. the mid-point to a shallow V-shaped ring with flange at the centre of which is the motor housing. The motor stands proud of the ring. The ring has a number of drain hole detents at the interface between the motor housing and the ring flange.

Component holding device

Abstract: The invention relates to a component holding device (1) for the fixed-position arrangement of an electric component (2) on a circuit board (3), having a support side (4) for receiving the electric component (2), wherein at least one pretensioning element and at least one first latching element for the fixed-position latching of the electric component (2) are provided on the support side (4), and the at least one pretensioning element is designed to exert a pretensioning force on the electric component (2), which presses the electric component (2) against the at least one first latching element, and having at least one second latching element on an underside (5) lying opposite the support side (4), wherein the second latching element is designed to fix the component holding device (1) in a predefined location in a fixed position on the circuit board (3).

Experimental and Numerical Analysis of Flow Instabilities in a Radial Fan

Abstract: Dynamic loads in turbomachines may lead to severe fluid induced vibrations, in particular, if resonance conditions are matched. The major sources of such unsteadiness are rotor/stator interaction, flow separation on the blade suction side at part-load and separation due to the curvature of the shroud. In the present work, some of these phenomena are investigated using computational techniques (Computational Fluid Dynamics - CFD) as well as novel measurement methods (High-Speed Particle Image velocimetry - PIV). The measurements provide a unique database of the velocity fields in an industrial impeller at various operation conditions. They are the base for validation of the computational methods. In view of the complexity of the separated, transient and turbulent flow field, this is still an open issue. Besides that, the analysis of the transient flow fields allows the determination of the “modes” of unsteady forces und thus, to shed some light on the sources of unsteadiness in the flow.Copyright © 2014 by ASME

Electric motor with adhesively bonded ring magnet

Abstract: An electric motor (20) has a stator (30) and a rotor (26). The latter is equipped with a cup-like rotor part (56) and with a ring magnet (60) adhesively bonded therein, which magnet has an outer circumference (61) on which are provided elevations (84) and depressions (86) that extend at least partly in the longitudinal direction of the ring magnet (60). The outer circumference (61) of the ring magnet (60), that faces toward the cup-like rotor part (56) after assembly, is formed with at least one opening or channel (68; 69, 88), extending in a circumferential direction, that is connected to at least a plurality of the flat depressions (86). Positive mechanical engagement between adhesive and ring magnet enhances durability, and discourages any tendency toward relative rotation between the magnet (60) and the cup-like rotor part (56).

Flat flow-conducting grille

Abstract: The invention relates to a flow-conducting grille designed as a pre-conducting grille for arranging on an suction region of a fan, wherein the flow-conducting grille has a grille web structure about an axial center line, which grille web structure comprises radial webs spaced apart in the circumferential direction and coaxial circumferential webs spaced apart in the radial direction and an outer ring, wherein an inflow side of the flow-conducting grille extends flatly and parallel to a radial plane of the flow-conducting grille.