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.

Connecting device for an electric motor

Abstract: The invention relates to a connecting device (2) for an electric motor, particularly an external rotor motor, to connect ends of a stator winding to a connecting lead (65). Said connecting device (2) is composed of a wiring plate (4) which is arranged on a plane extending in a radial direction relative to the stator axis and within a circumferential circle defined by a stator diameter, and which is provided with terminal areas for contacting the connecting lead (65) as well as shaped strip conductor guides (14) and strip conductors (6) with terminal lugs (38) for contacting the stator winding. A plug element (10) is provided which can be pre-assembled on the connecting lead (65) and comprises insulation displacement contacts (68) that contact the connecting lead (65). The plug element (10) can be mounted on the wiring plate (4) parallel to the stator axis such that the insulation displacement contacts (68) contact the terminal areas of the strip conductors (6) embodied as contacting sections (32a, 32b).

Electrical motor with self-protection against overheating

Abstract: The self protection unit (1) has a sensor unit (2) for determining the temperature in the motor and the surrounding region. There is a regulating unit (4) connected with the sensor unit (2) and the control. The regulating unit (4) respectively compares at least one sensor signal as a temperature actual value (i1, i2, i3, i4) with a specified associated limit value (G1, G2, G3, G4).If the temperature exceeds the predetermined value, the supply to the motor winding is controlled. By alteration of the electric power or the motor speed, the temperature is regulated.

Method for monitoring life span and for determining remaining life span of technical component, involves determining remaining life span based on all current life span-calculations since initial operation

Abstract: The method involves determining maximum theoretical life span for determined and predetermined operating conditions. The current life span-calculations are carried out cyclically during the operation according to initial operation of the component taking into account the currently existing, actual operating conditions based on measured current operating parameters. The remaining life span is determined based on all the current life span-calculations since the initial operation. An independent claim is included for an electronically commutated electric motor with an electronic controller for executing the method.

Radial- oder Diagonal-Ventilatorrad

Abstract: Die vorliegende Erfindung betrifft ein Ventilatorrad (1) in einer Ausfuhrung als Radial- oder Diagonalventilator, bestehend aus einer Deckscheibe (2) mit einer Einlassoffnung (4), einer Bodenscheibe (6) und mehreren uber den Umfang der Einlassoffnung (4) und um eine Rotationsachse (Z) herum verteilt angeordneten Ventilatorschaufeln (8) sowie mit in Umfangsrichtung jeweils zwischen den benachbarten Ventilatorschaufeln (8) gebildeten Schaufelkanalen (10). Die Schaufelkanale (10) fuhren vom Bereich der Einlassoffnung (4) aus radial oder diagonal nach ausen und bilden am Ausenbereich Ausblasoffnungen (11). Bezuglich ihres effektiven Stromungsquerschnitts sind die Schaufelkanale (10) derart ausgelegt, dass im Betrieb eine turbulente Stromung mit einer Reynolds-Zahl (Re) deutlich groser 2300 bei hohem Wirkungsgrad erreicht wird. Die Deckscheibe (2) und/oder die Bodenscheibe (6) weisen/weist eine nicht-rotationssymmetrische Geometrie auf, die in axialer bzw. achsparalleler Richtung (Z) gesehen einen kontinuierlichen, punktstetigen Verlauf aufweist.

Permanent magnet excited electric motor with reduced cogging torque

Abstract: An electric motor ( 1 ) has a stator ( 2 ) and a radially symmetric, permanent magnet excited rotor ( 4 ) coaxial with the stator ( 2 ). The rotor ( 4 ) rotates relative to the stator ( 2 ) about a common motor axis (X). The stator ( 2 ) has a radially symmetric iron core ( 6 ) with a defined number (N) of stator teeth ( 10 ) which are each adjacent to one another via stator slots ( 8 ) and slot openings ( 8 a ) in the circumferential direction. The rotor ( 4 ) has pole magnets ( 14 ) adjacent to one another. A circumferential gap ( 18 ) is formed radially between the pole magnets ( 14 ) and the stator teeth ( 10 ). Each stator tooth ( 10 ) has on its surface ( 20 ) facing the gap ( 18 ) and adjacent to the slot openings ( 8 a ) on both sides in the circumferential direction a relief-like topographic region ( 22 ) radially enlarging the gap ( 18 ) with least one concave recess ( 24 ) and a smooth profile.