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.

Electronic control circuit comprising power transistors and method for monitoring the service life of the power transistors

Abstract: The disclosure relates to an electronic control circuit for an electric device, in particular designed as a commutation electric system of an EC motor, having a plurality of power transistors which are controlled in an operating mode for controlling the device. An additional, similar, non-charged reference transistor in the operating mode of the power transistors is arranged or formed together with the power transistors on a common support or substrate. The circuit also comprises means for applying to the reference transistor and at least one power transistor, respectively one test flow in a test mode for measuring the respective associated saturation voltage and for evaluating saturation tension differences resulting from the measured saturation voltages of the reference transistors and the respective power transistors taking into account the temperature of the support/substrate produced during the measurement as the criterion for an aging process and an expected remaining service life of the power transistors. The disclosure also relates to a method for monitoring power transistors in said type of electronic control circuit with respect to the expected remaining service life thereof.

Electric motor, in particular outer rotor motor

Abstract: The motor includes a rotor (1), a stator (2) and a switch ring (3), which contacts the windings of the stator. A flange (4) covers the switch ring and consists of a stator socket (8) and of a connection unit (10), which has contacts (11) for the connection to corresponding electrical contacts of the switch ring. A motor connection cable (13) can be connected to the contacts of the connection unit.

Radial blower, in particular, for a breathing apparatus

Abstract: A radial blower, in particular, for a breathing apparatus, has a blower housing with a central, axial intake opening and a radial or approximately tangential outlet opening as well as a motor-driven radial blower wheel arranged axially between the intake opening and the outlet opening. The radial blower wheel has a cover disk at the axial side facing the outlet opening with such a large diameter that between the outer circumference of the cover disk and an inner circumferential surface of the housing a constricted annular flow gap for the medium flowing through the radial blower wheel in the direction toward the outlet opening is formed.

Elektromotor mit hoher ip-schutzart

Abstract: Die Erfindung betrifft einen Elektromotor (1) mit einem Motorgehause (2) hoher IP-Schutzart, bestehend aus einem Stator (4) und einem den Stator (4) von einer Seite her als Teil des Motorgehauses (2) topfartig umschliesenden Ausenlaufer (6) sowie einem sich als weiterer Teil des Motorgehauses (2) auf der dem Ausenlaufer (6) axial gegenuberliegenden Seite anschliesenden, eine Steuerelektronik (18) enthaltenden Elektronikgehause (16). Der Ausenlaufer (6) ist uber eine Lauferwelle (12) in einem in dem Stator (4) sitzenden Lagertragrohr (10) drehbar gelagert. Das Lagertragrohr (10) ist einstuckig aus einem gut warmeleitenden Material, bestehend aus einem auf der der Steuerelektronik (18) zugewandten Seite radial nach ausen gefuhrten Ringflansch (22), verbunden. Dieser Ringflansch (22) ist auserhalb des Motorgehauses (2) mit Kuhlrippen (24) versehen, wobei vorzugsweise der Ausenlaufer (6) in seinem dem Ringflansch (22) zugewandten Bereich ein Luftrad (28) mit den Kuhlrippen (24) axial gegenuberliegenden Lufterrippen (30) tragt.

Electric motor with functional monitoring of the motor bearings

Abstract: The present invention relates to an electric motor, comprising a stator and a rotor that can rotate relative to the stator and that is mounted in bearing arrangements, and also comprising a motor housing and a vibration sensor to pick up vibrations that occur in the electric motor and that are caused by malfunctions of the bearing arrangements The configuration provided here is that of an external-rotor motor The stator has a bearing support tube that is connected at one end to a ring-shaped stator flange Bearing arrangements are arranged at a distance from each other in the bearing support tube in the direction of a center longitudinal axis of the bearing support tube, in which a shaft of the rotor is supported The vibration sensor is attached to the stator flange