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.

Electronically commutated inner rotor motor i.e. electronically commutated electric motor, has housing for accommodating rotor and stator, where housing section is fastened to area of another housing section over locking connection

Abstract: The motor (100) has a housing (110) for accommodating an inner rotor and an outer stator, where the inner rotor is provided with a rotor shaft (122). The housing has a housing section (112) in which the outer stator is arranged and another housing section (114) in which a bearing element (130) is fixed for rotatably supporting the rotor shaft. The latter section is fastened to an axial end area (111) of the former section over a snatching, clip or locking connection (113). The former section is made from plastic or metal, and the bearing element is designed as a ball bearing. An independent claim is also included for an injection molding tool for manufacturing a plastic housing section.

Blade of a ventilator wheel, ventilator wheel and axial ventilator

Abstract: The invention relates in particular to a ventilator wheel of an axial ventilator, which includes multiple blades, each having radially outward extending blade forward edges and radial outer edges on the outlet side, wherein a transition from the radial outer edges to the blade forward edges is formed, in each case with a projection extending in the circumferential direction relative to the adjacent, radially outward extending blade forward edges, wherein a seamless transition is formed from the radial outer edge portion (7) to a region of the respective blade situated radially further inward.

Düsenvorrichtung mit Staubabscheider und Verfahren zum Messen eines Luftmassenstromes

Abstract: Die Erfindung betrifft eine Dusenvorrichtung zur Luftforderung bei einem Geblase, umfassend ein Dusengehause mit einer Ausenwandflache, wobei an der Ausenwandflache ein Staubabscheider mit mindestens einer Stromungseintrittsoffnung und mindestens einer Stromungsaustrittsoffnung vorgesehen ist und die mindestens eine Stromungseintrittsoffnung uber mindestens eine Gehausewandoffnung mit einem Inneren der Dusenvorrichtung stromungsverbunden ist, so dass ein Teil der durch die Dusenvorrichtung geforderten Luft als Bypassstromung durch den Staubabscheider stromt, wobei an der mindestens einen Stromungsaustrittsoffnung des Staubabscheiders ein Sensor zur Messung von Parametern der geforderten Luft derart angeordnet ist, dass die aus der mindestens einen Stromaustrittsoffnung des Staubabscheiders stromende Bypassstromung unmittelbar auf den Sensor trifft. Ferner betrifft die Erfindung ein Verfahren zum Messen eines Luftmassenstromes.

Circuit for thermal protection and for power control of electric motors

Abstract: Die vorliegende Erfindung betrifft eine Schaltung zum thermischen Schutz und zur Leistungsregelung in Abhangigkeit von einer aktuellen Wicklungstemperatur von Strangwicklungen eines Elektromotors. The present invention relates to a circuit for the thermal protection and for controlling the power in dependence of an actual winding temperature of phase windings of an electric motor. Die Schaltung umfasst einerseits mindestens einen die Wicklungstemperatur der Strangwicklungen messenden Temperaturwachter-Schalter TW1, TW2, der bei Erreichen einer bestimmten Wicklungstemperatur, der Schalttemperatur, ein Abschalten eines durch die Wicklungen fliesenden Wicklungsstromes bewirkt, sowie einen den Strangwicklungen zugeordneten temperaturabhangigen Widerstand PTC, der bei Erreichen einer bestimmten Wicklungstemperatur durch eine erfolgte Widerstandserhohung eine Leistungsminderung der Motorteistung bewirkt bzw. den Motor abschaltet. The circuit comprises on the one hand at least one winding temperature of the phase windings measured temperature monitor switch TW1, TW2, which causes when a certain winding temperature, the switching temperature, a switching off of a current flowing through the windings of the winding current, and a strand windings associated temperature-dependent resistor PTC, upon reaching a certain winding temperature was carried out by an increase in resistance causes a degradation of performance Motorteistung or disable the engine. Eine der Strangwicklungen weist den temperaturabhangigen Widerstand PTC auf. One of the phase windings has the temperature-dependent resistor PTC. Die anderen Strangwicklungen bzw. die andere Strangwicklung besitzt jeweils einen Temperaturwachter-Schalter TW1, TW2. The other strand windings or the other phase winding in each case has a temperature control switch TW1, TW2. Der temperaturabhangige Widerstand PTC und der Temperaturwachter-Schalter bzw. die Temperaturwachter-Schalter TW1, TW2 sind in Reihe geschaltet an einer Spannungsquelle angeschlossen. The temperature-dependent resistor PTC and the temperature monitor switch or the temperature monitor switch TW1, TW2 are connected to a voltage source connected in series.

Turning direction dependent revolution speed signal generating method e.g. for production of direction-controlled velocity signals, involves producing several impulses per time unit, proportional to speed of arrangement

Abstract: The method involves producing several impulses per time unit, proportional to a speed of the arrangement. The direction of motion of the arrangement is determined. The length of time (tR, tL) of the impulses is controlled dependent on the determined direction of motion. The impulses are used as related to the direction modified velocity signal. The produced velocity signal (nDIR) is a binary signal. After the production of an impulse an impulse break with a given length of time (tP) is provided during which a new impulse in generated. An independent claim is included for an arrangement.