Showing papers by "ebm-papst published in 2008"

Arrangement for delivering fluids

Abstract: An arrangement for delivering fluids has a fluid pump (91), which is designed in the manner of a centrifugal pump. Said pump (91) has an impeller (90) that is connected to a first permanent magnet (92), and it has an electronically commutated internal armature motor (70) as the drive. Said motor has a stator (68) within which a rotor (60) having a second permanent magnet (64) is rotatably located. The second permanent magnet (64) works together with the first permanent magnet (92) in the manner of a magnetic clutch (93). The arrangement also has a split case (52) that separates the first permanent magnet (92) of the magnetic clutch (93) located within said split case (52) from the second permanent magnet (64) of the internal armature motor (70) located outside of the split case (52) in a fluid-tight manner. The stator (68) of the internal armature motor (70) is located radially outside the magnetic clutch (93). A first axis (54) located on the outside of the split case (52) serves to rotatably support the rotor (60) of the internal armature motor (70).

Fan having a printed circuit board

Abstract: A fan (20) to which the invention relates has: a motor with a stator and with a rotor (60) with at least one fan vane, at least one air inlet with an air inlet opening (102) for the inlet of air, at least one air outlet with an air outlet opening (32) for the outlet of air, and a printed circuit board (80) with at least one cutout, which printed circuit board (80) is arranged in the region of the air inlet in such a way that air can enter through the cutout into the fan (20), wherein motor electronics (88) are arranged on the printed circuit board (80).

Aktuatoreinheit für eine Kraftfahrzeug-Steer-by-Wire-Lenkeinrichtung

Abstract: Eine Aktuatoreinheit 1 fur eine Kraftfahrzeug-Steer-by-Wire-Lenkeinrichtung umfasst eine in einem Mantelrohr 17, 22 angeordnete, gegenuber diesem um ihre Langsachse drehbar gelagerte Lenkspindel 15, deren eines Ende zum drehmomentschlussigen Anschliesen eines Lenkrades ausgebildet ist, sowie einen Aktuator 2 mit einer durch den Aktuator 2 angetriebenen Aktuatorwelle 4, deren eines Ende drehmomentschlussig an die Lenkspindel 15 angeschlossen ist. Die Lenkspindel 15 ist starr an die in zwei Lagern 7, 8 gelagerte Aktuatorwelle 4 angeschlossen, wobei eines der beiden Lager 7 im Bereich des Anschlusses der Aktuatorwelle 4 an die Lenkspindel 15 angeordnet ist, und die Lenkspindel 15 infolge ihres starren Anschlusses an die Aktuatorwelle 4 aktuatorseitig uber die Aktuatorwelle 4 gelagert ist.

Electric motor stator comprising a temperature controller

Abstract: The invention relates to a stator (1) for an electric motor, particularly for an external rotor motor, having a stator sheet stack (2) provided with a stator winding (8) and having an interconnection arrangement (20) arranged on a face in the region of an end winding (9) of a stator winding (8) for electrically connecting winding wire ends of the stator winding (8) and connection wires (16) of a temperature controller (18) connected upstream of the stator winding (8). The interconnection arrangement (20) comprises an isolated switching disk (22) overlapping the region of the end winding (9), particularly in the form of a cap. The temperature controller (18) is kept integrated in the switching disk (22) such that it sits at the end winding side between the stator winding (8) and the switching disk (22) in a heat conducting contact with the stator winding (8).

Electronically commutated external rotor motor with a circuit board

Abstract: An electronically commutated motor (ECM 21 ) has reduced vulnerability to Electro-Static Discharge (ESD). The motor has an internal stator ( 50 ) and an external rotor ( 22 ) equipped with a permanent magnet ( 28 ), which rotor is separated by an air gap from the internal stator ( 50 ). The rotor has a shaft ( 34 ) on which a magnetic yoke element ( 24 ) is mounted. A leakage flux region on an end face ( 27 ) of the magnet ( 28 ) actuates a Hall sensor ( 48 ) located adjacent a first aperture ( 48 ′) in a circuit board ( 46 ) supporting electronic control components. In order to prevent static discharges from passing through the first aperture ( 48 ′) and endangering the electronic components, the circuit board ( 46 ) is formed with a second aperture ( 43 ) on whose edge is provided at least one electrical conductor ( 95′, 95 ″), connected to ground ( 112 ), to which any charge that builds up during operation can harmlessly discharge.

Method and control system for transforming an AC voltage into a consumer supply voltage with adjustable rms value

Abstract: The method involves changing a single-phase or multi-phase supply alternating current (AC) voltage (Un) over distribution of a phase angle with respect to instantaneous values (Un') of the AC voltage based on a preset function about a factor. The changing of the AC voltage is taken place so that an operating voltage (UM) is generatable about the phase angle with distribution of instantaneous values from 0 to 100 percent of the associated instantaneous values of the AC voltage. The AC voltage is reformed into the operating voltage by a changeable control element (6). An independent claim is also included for a control system for reforming a sinusoidal supply alternating current (AC) voltage into an operating voltage for an electric consumer.

Winding arrangement for an electric machine and separating element for such arrangement

Abstract: The invention relates to a winding arrangement (7) for an electric machine, such as an electric motor or generator, comprised of a metallic winding core (8) designed in particular as a laminated core, and also of windings (6) running through grooves (9) of the winding core (8) and each forming a winding head (10) outside of the grooves (9) on end faces of the winding core (8), wherein the windings (6) form in the region of each winding head (10) at least two winding layers (A, B) placed one above the other, between said layers there is arranged an essentially disk-shaped separating element (1) consisting of an electrically insulating material and resting against the windings (6) essentially with no gap. In order to ensure a dependable insulation for the winding layers (A, B) but also an improved automatic winding process and in particular a reduced height of the winding head, the invention proposes that the underside (5) of the separating element (1) be formed by a preshaped freeform surface which is an exact negative image of the winding layer (A) resting below the separating element (1).

Electronically commuted motor

Abstract: The invention relates to a method for operating an electronically commuted motor (10), provided with a rotor (12), a stator (14) with a multi-thread winding arrangement (16), provided with an end stage (18) for electrical supply thereof, a first line (30) and a second line (32) for connecting the end stage (18) to a voltage supply (24) and a first regulator. The method comprises the following steps: a first signal (U_34; U_38) is recorded which characterises a current (I_N; I_N'; I_M; I_M') flowing through at least one of the lines (30; 32), depending on the first signal (U_34; U_38) a first value is determined, characterising the mean value of the current (I_N; I_N'; I_M; I_M') flowing through at least one of the lines (30; 32), a first adjustable value is determined in the first regulator, wherein the first regulator is provided the first value as actual value and a second value as set value, and at least one clock signal (PWM) is generated depending on the first adjustable value and supplied to the end stage (18) in order to influence the first value. The invention further relates to a corresponding motor (10).

Fan unit having an axial fan with improved noise damping

Abstract: Due to variations arising during manufacturing, axial fans often are slightly imbalanced, resulting in noise during operation, which is undesirable in many contexts, for example when the fan is used for ventilation purposes in a motor vehicle. A fan with improved vibration and noise damping can be achieved by elastically suspending the fan wheel within a first ring formed of a hard plastic, the first ring having a tubular extension formed of a softer plastic, and serving to mechanically connect the first ring to a surrounding annular carrier part. Optionally, the first ring and extension unit can include a spring element. Preferably, the first ring and tubular extension are produced by a multi-component forming technology such as two-plastic technology. The fan is preferably driven by an electronically commutated motor (ECM).

Fan arrangement in which the consumed electric power is influenced

Abstract: Disclosed is a fan arrangement (20) comprising a fan (24) that is driven by an electric motor (22), a device for continuously detecting an actual electrical value associated with the electric motor (22) during operation, an input device for entering a desired electrical value for operating the electric motor, a comparator (26) for comparing said desired electrical value with the actual electrical value, and a regulator which regulates said electrical value by means of a pulse width modulation process (36).

Electronically commutated asynchronous motor

Abstract: An electronically commutated asynchronous motor ( 12 ) features a stator ( 202 ), a short-circuit rotor ( 204 ), a controller (FOR 20 ) for field-oriented regulation of the motor ( 12 ), a sensor magnet ( 274 ) in thermally conductive connection with the short-circuit rotor ( 204 ), a rotor position sensor ( 14 A; 18; 18 ′) arranged at a predetermined distance (d) from the sensor magnet ( 274 ) to generate an output signal (HALL, U, U 1 , U 2 ) that is dependent upon the spatial orientation of the sensor magnet ( 274 ), and a temperature evaluation apparatus (CALC_T 44 ) configured to ascertain, during operation, from the sensor output signal (HALL, U, U 1 , U 2 ), a temperature value (T) that characterizes a temperature (T_SM, T_S) in the motor ( 12 ).

Lüftereinheit mit einem Axiallüfter

Abstract: Eine Luftereinheit hat einen Axiallufter (20; 120), welchem ein Luftfuhrungsrohr (22; 122) zugeordnet ist, durch welches der Lufter (20; 120) im Betrieb Luft transportiert, welches Luftfuhrungsrohr (22; 122) mit mindestens einem Aufhangeglied (23; 123) aus einem elastomeren Werkstoff verbunden ist, welches Aufhangeglied (23; 123) in einem aus einem harten Kunststoff gebildeten, ersten Ring (40; 140) elastisch aufgehangt ist, welcher erste Ring (40, 140) mindestens einen aus einem weichen Kunststoff gebildeten, rohrartigen Fortsatz (50, 150) zur gerauschdampfenden Verbindung der Luftereinheit mit einem Tragerteil (15) aufweist.

Seal for circumferential gap sealing

Abstract: An improved shaft seal with reduced wear and for use in high temperatures, has a non elastic sealing ring fitted around the shaft and held inside an elastic support ring whose outer edge locates in the support housing. The floating mounting accommodates tolerances in alignment and manufacture. The sealing ring can be of PTFE or other suitable material. The support ring can be a sprung cup washer.

Novel motion sensorless control of high-speed small-power surface mount PMSM drives: With experiments

Abstract: Cost and reliability reasons lead to motion sensorless control of high speed PMSM drives. This paper introduces a novel emf based observer for rotor position and speed estimation that provides very fast starting from pre-produced zero initial position (less than 100 milliseconds from zero to 10 krpm in a 750 W surface PMSM) with very good dynamics response to large step torque perturbations. Implementations and test results fully validate the proposed control solution.

Electric motor, has rotor with cup-like rotor part and magnet ring with outer circumference comprising recess that runs in circumferential direction, where recess stays in connection with portion of flat depressions

Abstract: The motor (20) has a rotor (26) with a cup-like rotor part (56) comprising an internal recess (58) and a plastic-bonded magnet ring (60) stuck in the internal recess. The ring has an outer circumference (61) on which flat elevations and flat depressions are provided. The elevations and depressions run partially in a longitudinal direction of the ring. The outer circumference of the magnet ring is provided with a recess that runs in a circumferential direction, where the recess stays in connection with a portion of the flat depressions. An angular surface is provided on the ring.

Elektronisch kommutierter Asynchronmotor

Abstract: Ein elektronisch kommutierter Asynchronmotor (12) weist auf: einen Stator (202), einen Kurzschlussrotor (204), einen Regler (FOR 20) fur die feldorientierte Regelung des Motors (12), einen Sensormagneten (274), welcher in Warme leitender Verbindung mit dem Kurzschlussrotor (204) steht, einen Rotorstellungssensor (14A; 18; 18'), welcher in einem vorgegebenen Abstand (d) von diesem Sensormagneten (274) vorgesehen ist und ein von der Stellung des Sensormagneten (274) abhangiges Ausgangssignal (HALL, U, U1, U2) erzeugt, und eine Temperaturauswertevorrichtung (CALC_T 44), welche dazu ausgebildet ist, im Betrieb aus diesem Ausgangssignal (HALL, U, U1, U2) einen Temperaturwert (T) zu ermitteln, welcher eine Temperatur (T_SM, T_S) im Motor (12) charakterisiert.

Ventilation unit with an axial ventilator

Abstract: The ventilator unit (10) has an axial blower (20) to which an air passage tube (22) is attached, where the blower transports air via the air passage tube during operation. The tube is connected with hanging units (23I, 23II, 23III, 23IV) made of elastomer material, where the hanging units are suspended in a ring (40) made of hard plastic. The ring has a tubular extension (50) formed of soft plastic for connection of the unit with a support part in noise-damping manner. The tubular extension is designed according to type of bellows. The hanging units are designed as circular carrier bands.

Electric motor with adhesively bonded ring magnet

Abstract: An electric motor (20) has a stator (30) and a rotor (26). The latter is equipped with a cup-like rotor part (56) and with a ring magnet (60) adhesively bonded therein, which magnet has an outer circumference (61) on which are provided elevations (84) and depressions (86) that extend at least partly in the longitudinal direction of the ring magnet (60). The outer circumference (61) of the ring magnet (60), that faces toward the cup-like rotor part (56) after assembly, is formed with at least one opening or channel (68; 69, 88), extending in a circumferential direction, that is connected to at least a plurality of the flat depressions (86). Positive mechanical engagement between adhesive and ring magnet enhances durability, and discourages any tendency toward relative rotation between the magnet (60) and the cup-like rotor part (56).

Fan with integrated regulation valve

Abstract: A radial fan, in particular for a gas burner, for premixing air and gas, comprising a housing with a radial fan wheel disposed therein, and a regulation valve for regulating a gas volume, which comprises a valve seat, wherein the valve seat of the regulation valve is formed by a portion of the housing.

Auxiliary drive device for driveless vehicle trailers, in particular caravan shunting aid

Abstract: The system has a carrier (3) fastened to a vehicle trailer in a region of a wheel (2), and a bearing carriage (4) slidably supported at the carrier. A drive motor (7) arranged at the bearing carriage rotatably drives a friction roller (11), which is engageable to the wheel for the accessory drive of the wheel. The accessory drive for displacement of the bearing carriage for the deliver of friction roller is transferred at the wheel from the drive motor over a selectively activatable gear arrangement (8).

Two-stranded, two-pulsed electronically commutated motors synchronous running controlling method, involves simultaneously commutating current in all stator windings by current feeding arrangement i.e. n-channel MOSFET

Abstract: The method involves suppressing rotor position signals when the duration of a signal impulse exceeds a preset time period during the operation of electronically commutated motors (110, 112, 114, 116). Unsuppressed rotor position signals (H1-H4) are continuously analyzed during the running of the motors. The current in all stator windings (120, 122, 126, 128, 132, 134, 138, 140) is simultaneously commutated by a current feeding arrangement i.e. n-channel MOSFET (158, 172), when it is analyzed that all permanent magnetic rotors (118, 124, 130, 136) ran through a preset rotor position. An independent claim is also included for an arrangement for controlling the synchronous running of multiple electronically commutated motors.

Electronically commutated electric motor, has multivalent connection switching from function of digital control output to function of analog measuring input based on amplitude of digital control signals

Abstract: The motor (110) has a digital control unit (50) i.e. microcontroller, with a multivalent connection (52) to be usable as a digital control output (52') or as an analog measuring input (52''). The digital control output outputs digital control signals (CTRL) for controlling a controllable semiconductor switch (42) utilized to control the current in a coil strand (32) of a stator (30). The analog measuring input detects an analog signal. The multivalent connection is switched from the function of the control output to the function of the measuring input based on the amplitude of the signals. An independent claim is also included for a method for controlling an electronically commutated electric motor.

Hilfsantriebseinrichtung für antriebslose Fahrzeuganhänger, insbesondere Caravan-Rangierhilfe

Abstract: Eine Hilfsantriebseinrichtung fur antriebslose Fahrzeuganhanger, insbesondere Caravan-Rangierhilfe, umfasst - einen am Anhanger im Bereich eines Rades (2) befestigbaren Trager (3), - einen am Trager (3) verschiebbar gelagerten Lagerschlitten (4), und - einen am Lagerschlitten (4) angeordneten Antriebsmotor (7), der uber eine Getriebeanordnung (13) eine durch die Schlittenverschiebung zum Anhangerrad (2) zustellbare Reibrolle (11) fur den Hilfsantrieb des Rades (2) rotatorisch antreibt, wobei der Antrieb fur die Verschiebung des Lagerschlittens (4) zur Zustellung der Reibrolle (11) an das Anhangerrad (2) vom Antriebsmotor (7) uber eine zweite, selektiv aktivierbare Getriebeanordnung (8) ableitbar ist.