Showing papers by "ebm-papst published in 2014"

Radial- oder diagonalventilator

Abstract: Die Erfindung betrifft einen Radialventilator mit einem Laufrad (100) und einer zylinderformigen, um die Langsachse rotierbaren Antriebseinheit (200), wobei das Laufrad (100) aus einer Bodenscheibe und auf der Bodenscheibe angeordneten Schaufeln (101) besteht und wobei sich die Schaufeln (101) auf der der Hauptluftstromung zugewandten Seite befinden und ist dadurch gekennzeichnet, dass das Laufrad (100) in zwei Befestigungsebenen mit der Antriebseinheit (200) wirkverbindbar ist. Das Laufrad besteht aus einer Bodenscheibe und auf der Bodenscheibe angeordneten Schaufeln, wobei sich die Schaufeln auf der der Hauptluftstromung zugewandten Seite der Bodenscheibe befinden, und wobei die Bodenscheibe aus einer an der Hauptluftstromung zugewandten Seite befindlichen Oberschale und einer an der Hauptluftstromung abgewandten Seite befindlichen Unterschale aufgebaut ist, wobei die Oberschale und die Unterschale mit der zylinderformigen Antriebseinheit im montierten Zustand einen abgeschlossenen Hohlraum bilden, wobei eine erste Befestigungsebene an der Oberschale und eine zweite Befestigungsebene an der Unterschale angeordnet ist.

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

Ec motor with dynamic determination of optocoupler degradation

Abstract: In an EC motor, comprising a motor electronics, a signal input or a signal output, and an optocoupler for the galvanically isolated transmission of a useful signal between the motor control unit and the signal input or the signal output, the intention is to reliably determine the degradation of the optocoupler and to improve the service life of the EC motor. This is achieved in that an evaluation unit regularly evaluates a saturation voltage of the optocoupler at the output of the optocoupler in relation to a reference threshold when the optocoupler is wired and generates a warning signal when the saturation voltage exceeds the reference threshold.

Interconnecting device for stator arrangement of electromotor, has electronic control unit that is secured on circuit board, and flat plug which is connected with strip conductor

Abstract: The interconnecting device has an electronic control unit that is secured on a circuit board. A laminated stator core (3) of a stator arrangement (1) is connected on the circuit board through stator grooves (4). A flat plug made of copper or copper alloy is connected with a strip conductor. An end winding portion (5) forming a stator winding region (6) is provided at a front end of the laminated stator core. The flat plug is pressed or soldered into the circuit board. A galvanic tin layer or nickel layer is coated on the flat plug. An independent claim is included for a stator arrangement.

Ventilation Device, In Particular For Heating, Cooling, and/or Humidifying Air In Residential Buildings

Abstract: A ventilation device, in particular for heating, cooling and/or humidifying air in residential buildings, includes a duct-shaped housing ( 1 ) with an air inlet opening ( 2 ) and an air outlet opening ( 3 ), and a fan impeller ( 6 ) as well as a filter unit, heat exchange unit and/or heating coil unit ( 14 ) arranged in the main flow direction (Z) of an air flow generated by the fan impeller ( 6 ). An air guiding device ( 17 ) is arranged in the flow direction (Z) of the air flow in front of a suction nozzle ( 16 )—configured as a flow conditioner, includes a bar structure with air guiding bars-such that a flow inlet opening is configured on the suction side at an axial height in front of the flow inlet opening ( 15 ) by the bar structure whose opening surface is smaller than the opening surface of the flow inlet opening ( 15 ).

Assembly for estimating the service life of an electric motor

Abstract: A circuit board (36) having a temperature sensor arranged thereon for producing a temperature signal is associated with an electronically commutated motor (32), and a first assembly for continuously determining the service life of the motor (32) that is expected to be available is provided, which first assembly comprises: a second assembly (20, 236) for detecting a first value, which first value depends on the temperature signal (33) and characterises the temperature (T_S) in the region of the circuit board (36); a third assembly (240; 244) for detecting a second value, which characterises the rotational speed (n) of the motor (32); a memory (31) for storing a digital third value (Cr) for the service life of the motor (32) that is expected to be available; a computing device (30); and an output device (83) for outputting at least a first signal. The first assembly is designed to: - produce, at time intervals, a current service-life correction value (Δt) that depends on the detected first value for the temperature and the detected second values for the rotational speed (n); - change the currently stored third value for the service life (Cr) that is expected to be available on the basis of the calculated current service-life correction value (Δt); - store the result in the memory as a new currently stored third value for the service life (Cr) that is still available; and - produce and output the first signal as a function of the stored third value. The current service-life correction value (Δt) is preferably produced also on the basis of the electrical power and/or the current and the voltage.

Circuit for Thermal Protection and Power Regulation of Electric Motors

Abstract: A circuit for thermal protection and power regulation as a function of the current winding temperature of phase windings of an electric motor. The circuit including at least one temperature monitor switch (TW 1, TW 2 ) that measures the winding temperature of the phase windings, and that upon attainment of a specific winding temperature shuts off the winding current flowing through the windings, the circuit further including a PTC thermistor that is associated with the phase windings and that, upon attainment of a specific winding temperature, reduces power by means of a resistance increase, or shuts the motor off. One of the phase windings has the PTC thermistor. The other phase windings or winding has a temperature monitor switch. The PTC thermistor and the temperature monitor switch or switches (TW 1, TW 2 ) are connected in series to a voltage source.

Elektromotor mit funktionsüberwachung der motorlager

Abstract: Die vorliegende Erfindung betrifft einen Elektromotor (1), umfassend einen Stator (2) mit einem relativ zu diesem drehbar in Lageranordnungen (11) gelagerten Rotor (4) sowie ein Motorgehause (3, 12) und einen Schwingungssensor (16) zur Aufnahme von im Elektromotor (1) auftretenden Schwingungen, die durch Funktionsstorungen an den Lageranordnungen (11) verursacht werden. Es ist hierbei die Ausbildung als Ausenlaufermotor vorgesehen. Der Stator (2) weist ein Lagertragrohr (7) auf, das einendig mit einem ringformigen Statorflansch (8) verbunden ist. In dem Lagertragrohr (7) sind in Richtung einer mittleren Langsachse (X-X) des Lagertragrohrs (7) zueinander beabstandete Lageranordnungen (11) angeordnet, in denen eine Welle (9) des Rotors (4) gelagert ist. Der Schwingungssensor (16) ist am Statorflansch (8) befestigt.

Electric motor comprising an internal rotor and an external stator

Abstract: An electric motor (100) has: an external stator (28); an internal rotor (150), which is arranged rotatably moveably in the external stator (28) and has a laminate stack (200; 200'; 200"), which has a plurality of rotor laminations (210, 202; 201', 201") and in which at least one first cutout (614) and at least one second cutout (630) are provided, wherein the first cutout (614) is assigned a rotor magnet (224) arranged therein, wherein the second cutout (630) is assigned a jamming element (40) arranged therein, wherein a clamping member (692, 694) is provided between the first cutout (614) and the second cutout (630), and wherein the jamming element (40) and the second cutout (630) are designed to make it possible for the jamming element (40) to be supported on the laminate stack (200; 200', 200"), and to apply a force (F) to the clamping member (692, 694) in the direction towards the rotor magnet (224), wherein the second cutout (630) is formed by the through-opening (630) for accommodating a shaft (40), and wherein the jamming element (40) is formed by the shaft (40).

Radial impeller for a drum fan and fan unit having a radial impeller of this type

Abstract: An impeller has an inlet and outlet A bottom disc has an external diameter A top disc concentric to the bottom disc at an axial distance therefrom has a suction opening for the inlet A plurality of forward-curved blades are arranged between the bottom disc and the top disc A flow channel has an inner inlet side and an outer outlet side formed between adjacent blades The channel is curved convexly viewed in the running direction of the impeller The external diameter of the bottom disc is at least 20% greater than the internal diameter of the suction opening The top disc forms a guiding surface and an angle is formed between a tangent on the guiding surface at the inlet to the suction opening and a tangent on the guiding surface at the outlet from the flow channel on the air outlet side is at least 30°

Gas control unit of modular design and modular gas control valve

Abstract: The invention relates to a gas control unit of modular design, in particular for controlling the quantity of gas to be fed to a gas burner, having a pneumatically controlled gas control valve that is configured as a whole as a module and is usable in such a gas control unit of modular design together with a gas safety valve.

Compact centrifugal fan

Abstract: The invention relates to a compact centrifugal fan (1), in which a motor mounting (7) lies on an elastomeric element (9) arranged in a through-opening (4) between the fan housing (2) and the motor mounting, said motor mounting being fixed to the fan housing by means of the elastomeric element.

Kühlung und Entfeuchtung von LED-Scheinwerfern

Abstract: Die Leistungsdichte moderner LEDs erlaubt es heute, diese Beleuchtungsart in Scheinwerfern von Kraftfahrzeugen einzusetzen. Die eigentliche Lichtquelle ist unempfindlich gegenueber Vibration und Schock, muss allerdings ebenso wie andere elektronische Bauteile innerhalb gewisser Temperaturgrenzen betrieben werden. Die wichtigsten Lueftereigenschaften fuer ein funktionierendes Thermomanagement in LED-Scheinwerfern werden erlaeutert. Vorgestellt werden robuste kleine Gleichstromluefter, die speziell auf die Belange des LED-Scheinwerferbetriebs abgestimmt wurden und die fuer die zuverlaessige Abfuhr der ueberschuessigen Waerme sorgen. Durch die Ventilatoren werden schaedliche Waerme und Luftfeuchte vermieden.

Flow rectifier and fan assembly having a flow rectifier

Abstract: The invention relates to a flow rectifier for a flow inlet opening (7) of a fan assembly, comprising a grate structure (11) consisting of grate webs that cross each other, which grate webs bound a large number of grate openings (17) for sucking air in, wherein a preferably circular outlet opening bounded by an outlet-opening edge is provided for the outflow of air from the flow rectifier (8). According to the invention, the grate openings (17) bounded by the grate structure (11) are arranged around a closed central section (10) in a circumferential direction and radially outside of said central section, which central section is axially spaced apart from the outlet opening (15).

Strömungsgleichrichter sowie lüfteranordnung mit strömungsgleichrichter

Abstract: Die Erfindung betrifft einen Stromungsgleichrichter fur eine Stromungseintrittsoffnung (7) einer Lufteranordnung, umfassend eine Gitterstruktur (11) aus sich kreuzenden Gitterstegen, die eine Vielzahl Gitteroffnungen (17) zum Ansaugen von Luft begrenzen, wobei fur den Luftaustritt aus dem Stromungsgleichrichter (8) eine von einem Austrittsoffnungsrand begrenzte, bevorzugt kreisformige, Austrittsoffnung vorgesehen ist. Erfindungsgemas ist vorgesehen, dass die von der Gitterstruktur (11) begrenzten Gitteroffnungen (17) in Umfangsrichtung um sowie radial auserhalb eines geschlossenen Zentralabschnitts (10) angeordnet sind, der axial von der Austrittsoffnung (15) beabstandet ist.

Schutzgitter mit verbessertem Wirkungsgrad- und Geräuschverhalten

Abstract: Die Erfindung betrifft ein Schutzgitter fur einen Ventilator mit einer Stegstruktur, die in Umfangsrichtung beabstandete Radialstege und in radialer Richtung beabstandete koaxiale Umfangsstege umfasst, wobei das Schutzgitter zumindest einen radialen Ausenbereich und einen Zentralbereich um eine Mittelachse des Schutzgitters aufweist, wobei eine von dem radialen Ausenbereich und dem Zentralbereich aufgespannte Hullflache im axialen Ausenbereich konvex gekrummt und im Zentralbereich flach, insbesondere parallel zu einer Radialebene des Schutzgitters ausgebildet sind.

Verfahren zur Erkennung der Gasfamilie sowie Gasbrennvorrichtung

Abstract: Die Erfindung betrifft ein Verfahren zur Erkennung einer Gasfamilie unter Nutzung eines Geblases bei einer Gasbrennvorrichtung mit den folgenden Verfahrensschritten Messen eines dem Geblase zugefuhrten Luftmassenstroms mL1 mit einem Luftmassenmesser sowie einer ersten Geblasedrehzahl zu einem vordefinierten Zeitpunkt, Betrieb des Geblases bei konstantem Luftmassenstrom mL1, Zufuhren von Gas, in Stromungsrichtung nach dem Luftmassenmesser, in den Luftmassenstrom mL1, so dass das Geblase ein Gas-Luft-Gemisch fordert, wodurch sich der Luftmassenstrom von mL1 zu mL2 andert, Messen der Luftmassenstroms mL2 mit dem Luftmassenmesser sowie einer aus der Gaszufuhrung resultierenden zweiten Geblasedrehzahl, Vergleich der ersten Geblasedrehzahl mit der zweiten Geblasedrehzahl sowie eine Gasbrennvorrichtung zum Ausfuhren des Verfahrens.

Fan device and use of such a fan device

Abstract: The invention relates to a fan device, comprising an electric motor assembly (24, 26), which is designed to drive at least one blade wheel (34, 36) in a flow channel (18) provided axial to the blade wheel, an electronic assembly (38, 40), which forms commutator and/or ballast electronics for the electric motor assembly, is arranged in series with the electric motor assembly, and is realized on a circuit carrier, and a carrier unit formed axially on or in the flow channel for retaining the electric motor assembly, wherein the carrier unit, which forms an inner circumference of the flow channel at least in some sections, is made of a thermally conductive material, wherein the carrier unit has, on an outer segment (16) radially opposite to the flow channel, a mounting and cooling surface for interacting with the circuit carrier and/or power electronics components provided thereon in a heat-dissipating manner.

Wandring eines Lüfters mit Heizelement

Abstract: Die vorliegende Erfindung betrifft einen Wandring (1) fur einen Lufter mit einem Lufterrad, umfassend mindestens ein Heizelement (3) zum Beheizen des Wandrings (1). Das Heizelement (3) umfasst eine elektrisch leitende Heizschicht, die an der dem Lufterrad zugewandten Innenseite (2) des Wandrings (1) angeordnet ist.

Schaltung zum thermischen Schutz und zur Leistungsregelung von Elektromotoren

Abstract: Die vorliegende Erfindung betrifft eine Schaltung zum thermischen Schutz und zur Leistungsregelung in Abhangigkeit von einer aktuellen Wicklungstemperatur von Strangwicklungen eines Elektromotors. 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. Eine der Strangwicklungen weist den temperaturabhangigen Widerstand PTC auf. Die anderen Strangwicklungen bzw. die andere Strangwicklung besitzt jeweils einen Temperaturwachter-Schalter TW1, TW2. Der temperaturabhangige Widerstand PTC und der Temperaturwachter-Schalter bzw. die Temperaturwachter-Schalter TW1, TW2 sind in Reihe geschaltet an einer Spannungsquelle angeschlossen.

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.

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.

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

Fan e.g. radial fan has rotor magnet which is arranged at inner periphery of wall portion, and is separated by magnetic air gap from stator and co-operating in operation with stator

Abstract: The fan (100) has an inner stator and an outer rotor (400). A bottom portion of a return portion (420) is with connected to wall section. A connecting element (410) made of thermosetting material is connected to annular collar and is connected to mounting portion of rotor shaft. A rotor magnet is arranged at inner periphery of wall portion, and is separated by a magnetic air gap from stator and co-operating in operation with stator. Fan blades (480) are provided with impeller (430) formed from a thermoplastic material wh9ich is connected to free end of return portion.

Method and control circuit for controlling a brushless electric motor

Abstract: The invention refers to a method for controlling a brushless, electronically commutated electric motor, a main AC voltage being rectified into an intermediate circuit direct voltage and this direct voltage being fed by an intermediate circuit containing an intermediate circuit capacitor to an inverter which is controlled by a motor control means for feeding and commutating the electric motor whereby the intermediate circuit direct voltage is monitored in respect of its voltage level and is compared with a predetermined limiting value and, on reaching or exceeding the limiting value, the intermediate circuit direct voltage is limited to the predetermined limiting value by clocked disconnection and reconnection.

GPGPU Based Aeroacoustic Optimization of a Contra-Rotating Fan

Abstract: Contra-rotating fans have several advantages over single stage axial fans. If they are well designed, the exit flow field is almost irrotational. This helps to increase the aerodynamic efficiency by up to 16%, when compared to single stage fans. However, since the second stage interacts with the flow disturbances from the first stage, the associated noise generation is a disadvantage. This may be remedied by carefully tuning the design. The optimization of a contra-rotating fan involves a large set of design parameters. These include the geometrical parameters of the fan blades, the winglets, the guide vane as well as the hub diameter. We demonstrate an evolutionary algorithm which helps to automate the optimization process. It is controlled by two objective functions: (1) aerodynamic efficiency and (2) the emitted tonal noise. For the evaluation of the sound pressure, we implemented a new lattice-Boltzmann solver. Due to its algorithmic structure, this is ideally suited for massive parallelization. To leverage this potential, it is designed to run on general-purpose graphics processing units (GPGPUs). To further accelerate the optimization, it is supported by a meta-model based on a radialbasis function network. We demonstrate the method for a small contra-rotating fan. Our numerical results are compared with physical tests. The new algorithmic arrangement has shown to drastically cut development costs and time.

Elektromotor mit innenrotor und aussenstator

Abstract: Ein Elektromotor (100) weist auf: Einen Ausenstator (28); einen in dem Ausenstator (28) drehbeweglich angeordneten Innenrotor (150), welcher ein Blechpaket (200; 200'; 200'') aufweist, welches eine Mehrzahl von Rotorblechen (201, 202; 201', 201'') aufweist und in dem mindestens eine erste Ausnehmung (614) und mindestens eine zweite Ausnehmung (630) vorgesehen sind, wobei der ersten Ausnehmung (614) ein darin angeordneter Rotormagnet (224) zugeordnet ist, wobei der zweiten Ausnehmung (630) ein darin angeordnetes Verklemmelement (40) zugeordnet ist, wobei zwischen der ersten Ausnehmung (614) und der zweiten Ausnehmung (630) ein Klemmglied (692, 694) vorgesehen ist, und wobei das Verklemmelement (40) und die zweite Ausnehmung (630) dazu ausgebildet sind, ein Abstutzen des Verklemmelements (40) am Blechpaket (200; 200'; 200'') zu ermoglichen, und das Klemmglied (692, 694) in Richtung zum Rotormagneten (224) hin mit einer Kraft (F) zu beaufschlagen, wobei die zweite Ausnehmung (630) durch die Durchgangsoffnung (630) zur Aufnahme einer Welle (40) ausgebildet ist, und wobei das Verklemmelement (40) durch die Welle (40) ausgebildet ist.

Protective circuitry for insulation damage due to failure of intermediate circuit capacitors

Abstract: The present disclosure relates to an intermediate circuit for an EC motor, comprising at least two similar series-connected capacitors for the connection of an electronic commutation device of an EC motor for nominal operation at a nominal voltage. In each case, a varistor is connected in parallel to each series-connected capacitor, wherein all the varistors are designed similarly. The capacitors and the varistors are dimensioned so that the threshold voltage of the varistors is less than the breakdown voltage of the respective parallel-connected capacitor, and, in the case of the failure of a capacitor or of a varistor, the sum of the threshold voltages of the remaining varistors is smaller than/equal to the nominal voltage of the intermediate circuit, and the sum of the threshold voltages of the series-connected varistors is greater than the nominal voltage of the intermediate circuit.