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.

Method for commutating an electronically commutated motor and motor for carrying out said method

Abstract: Disclosed is a method for commutating an electronically commutated motor (20) having a positive (34) and a negative connection line (36), a stator comprising at least one phase winding (22), a permanent-magnetic rotor (26), a rotor position sensor (28) for the production of a rotor position signal (u1, u2), a full bridge circuit (78) which is associated with the winding phase (22) and which has upper transistors (70, 72) embodied in the form of MOSFETs controlling the connection of the at least one phase winding (22) to the positive connection line (34) and which has lower transistors (74,76) embodied in the form of MOSFETs which are complementary to the upper transistors, controlling the connection of the phase winding (22) to the negative connection line (36). Two complementary MOSFET transistors are series connected in each branch of the bridge and a comparator (90, 92, 90', 92') is associated with each MOSFET transistor of the bridge circuit (78) for the control thereof. The MOSFET transistor of a branch of the bridge, which is to be disconnected after a predefined modification of the rotor position signal (u1, u2) in a manner controlled by said signal modification, is disconnected by means of the comparator associated therewith.During disconnection, the gate potential of the MOSFET transistor which is to be disconnected is monitored by the comparator associated with said MOSFET transistor to be disconnected. Once the monitored gate signal reaches a value which is characteristic for disconnection of the transistor which is to be disconnected, said MOSFET transistor to be disconnected is disconnected by the capacitor associated therewith.

Ventilator with conductor plate cooling circuit

Abstract: Die Erfindung betrifft einen Lufter mit einem dicht geschlossenen Elektronikgehause, in dem eine Leiterplatte mit Elektronikbauteilen angeordnet ist und das Elektronikgehause in einen Oberbereich und einen Unterbereich unterteilt, und einem in dem Unterbereich axial zur Leiterplatte angrenzend angeordneten Kuhlrad, wobei die Leiterplatte zur Stromungsverbindung des Oberbereichs und Unterbereichs mindestens eine Zentraloffnung und eine Vielzahl von Umfangsrandoffnungen oder Umfangsrandaussparungen aufweist, und durch das Kuhlrad Luft uber die mindestens eine Zentraloffnung aus dem Oberbereich in den Unterbereich saugbar und uber die Vielzahl von Umfangsrandoffnungen oder Umfangsrandaussparungen in den Oberbereich ruckfuhrbar ist, wobei ein Luftkreislauf mit zumindest einer Luftstromung entlang einer Oberflache der Leiterplatte entsteht, auf der die Elektronikbauteile angeordnet sind. The invention relates to a fan with a tightly closed electronics housing in which a printed circuit board with electronic components is arranged and the electronics housing divided into an upper portion and a lower portion, and a in the sub-region axially to the PCB disposed adjacent cooling wheel, wherein the circuit board to the flow connection between the upper portion and sub-region at least one central opening and a plurality of peripheral edge openings or peripheral edge has recesses, and the cooling wheel air over the at least one central opening in the upper area in the sub-area can be sucked and traceable via the plurality of peripheral edge openings or peripheral edge recesses in the upper region, wherein an air circuit having at least one air flow along a surface of the printed circuit board is formed, on which are arranged the electronic components.

Die ökologisch-soziale Marktwirtschaft: Ökonomische Effizienz plus soziale Verantwortung

Abstract: Der Beitrag zeigt, warum wir eine Effizienzrevolution brauchen. Die sauberste Energie ist immer noch die, die nicht gebraucht wird. Die Energiewende muss in Zukunft beide Seiten, die Energieerzeuger wie die Energieverbraucher, in die Pflicht nehmen. Unternehmen, offentliche Hand und Verbraucher mussen gemeinsam fur mehr Energieeffizienz motiviert werden. Eine Kampagne konnte die Herausforderung erlebbar und mehr Energieeffizienz zu einer Bewegung machen. Machen wir „green tec made in Germany“ zu einem Erfolgsprodukt und Exportschlager! Mehr Energieeffizienz lohnt sich, sozial, okologisch und okonomisch. Und es reduziert die Abhangigkeit von unsicheren Regionen und Regimen.

Power semiconductor, and method for producing the same

Abstract: The invention relates to a power semiconductor (1) which comprises a housing (2) with a first housing side (5) and an opposite second housing side (6). The first housing side (5) is provided with a cooling body (4) for removing dissipated heat. The second housing side (6) defines an alignment plane (12). The semiconductor (1) is further provided with connecting elements (3) that project from the housing (2) and that are bent in the direction towards the second housing side (6) in such a manner that they project beyond the alignment plane (12) of the second housing side (6). In their terminal regions (11), said connecting elements are adapted to receive SMD components of a printed board (13).

Flow rectifier of a fan

Abstract: The present disclosure relates to a current rectifier for being arranged on the suction area of a ventilator, with an axial initial flow side and an axial exit flow side, wherein the current rectifier comprises several crossing struts formed by at least one circumferential strut and by at least one radial strut, and a pressure measuring conduit is constructed at least in one of the struts and which comprises at least one opening facing the exit flow side, and wherein the pressure measuring conduit comprises a measuring opening for being connected to a measuring line for the connection to a pressure sensor or a pressure sensor is integrated in the pressure measuring conduit.