Abstract:
The invention relates to a laminated stator core (2) for an electric motor, comprising a plurality of star-shaped stator laminations (4) stacked on top of each other, wherein the stator laminations (4) have supporting elements (18) that protrude locally in a stacking direction (8), on which supporting elements the respective next stator lamination (4) lies in the stacked state.
Abstract:
Die Erfindung betrifft ein Statorblechpaket (2) für einen Elektromotor, mit einer Anzahl von aufeinander gestapelten sternförmigen Statorblechen (4), wobei die Statorbleche (4) in Stapelrichtung (8) lokal überstehende Auflageelemente (18) aufweisen, auf denen im gestapelten Zustand das jeweils nächste Statorblech (4) aufliegt.
Abstract:
Es soll ein einfach montierbares und hoch dynamisches Radiallager zur Verfügung gestellt werden. Daher wird ein magnetisches Radiallager zur drehbaren Lagerung eines Rotors (3) mit einem Stator (2), der mehrere Spulenanordnungen (6) aufweist, bereitgestellt. Die Spulenanordnungen (6) sind in einer Umfangsrichtung um eine Achse (1) des Radiallagers angeordnet. Jede der Spulenanordnungen (6) weist jeweils ein Blechpaket (7) mit Einzelblechen auf. Jede der Spulenanordnungen (6) weist außerdem eine Axialfeldspule (11) auf, die um das korrespondierende Blechpaket (7) gewickelt ist. Die Einzelbleche sind in jedem Blechpaket (7) in tangentialer Richtung gestapelt.
Abstract:
A transformer is provided having a stacked core with a pair of outer legs extending between a pair of yokes. The core is arranged in a plurality of layers. Each of the layers includes a pair of yoke plates and a pair of outer leg plates. In an innermost layer, the width of each yoke plate is less than the width of each outer leg plate. In each of the layers, the inner points of the outer leg plates are substantially in contact with the yoke plates. The cross-section of the inner leg and the outer legs may be rectangular or cruciform.
Abstract:
The core inside a combined radial-axial magnetic bearing is stacked with coated laminations each equipped with at least one radial cut. These cuts prevent the inducement of circulating currents caused by varying axial control fluxes through the central hole of the stack. Magnetic symmetry is preserved by pivoting every lamination with respect to the previous one over a particular angle. This arrangement not only reduces the losses in the bearing, but improves the performance of the axial channel as well.
Abstract:
Blechpaket mit weichmagnetischem Werkstoff und Verfahren zum Stoff schlüssigen Fügen von Paketlamellen zu einem weichmagnetischen Blechpaket Die Erfindung betrifft ein Blechpaket (1) mit weichmagnetischem Werkstoff (3) und ein Verfahren zum Stoff schlüssigen Fügen von Paketlamellen (4) zu einem weichmagnetischen Blechpaket (1). Das Blechpaket (1) weist Paketlamellen (4) aus weichmagnetischen Blechen (5) auf, die einen Paketlamellenstapel (6) bilden. Der Paketlamellenstapel (6) weist zwischen den Paketlamellen (4) Zwischenschichten (7) auf. Die Zwischenschichten (7) weisen einen ausgehärteten, im Zustand niedriger Viskosität in Zwischenräume zwischen den Paketlamellen (4) eingebrachten Klebstoff (8) auf. Dazu weisen die Paketlamellen (4) eine schlussgeglühte kristalline CoFe-Legierung, eine klebstoffbenetzbare Oberseite (9) und eine klebstoffbenetzbare Unterseite (10) auf. Die Paketlamellen (4) bilden mit den Zwischenschichten (7) ein maßgenaues Blechpaket (1). Das Blechpaket (1) weist dabei eine im wesentlichen klebstofffreie Kontur (12) aus Umrissflächen (11) der Paketlamellen (4) auf. Der Klebstoff (8) ist im Zustand niedriger Viskosität lösemittelfrei.
Abstract:
A circuit breaker having a current transformer for powering trip unit electronics and sensing low and high currents includes a core with solid and gapped laminations. The breaker includes an adjustment assembly for translating dial settings to tripping levels stored in memory. A temperature compensation algorithm adjusts trip points in response to temperature variations. A redundant trip activation scheme requires at least one pre-trip condition to be satisfied before the trip solenoid is activated. A supply voltage regulation system includes a stored energy circuit. A reconfigurable microcontroller executes a time-synchronized trip algorithm. The breaker trips according to a trip curve split into three protection regions. Software for detecting whether primary current exceeds each region are run in parallel or simultaneously, providing redundant instantaneous trip detection. A calibration method utilizes a signal chain that includes a current transformer, a burden resistor, a stored energy circuit and a controller.
Abstract:
A selective etching process cuts shapes from amorphous metal strip feedstock. The etching process comprises depositing a chemically resistant material to one side of the strip in a pattern that defines the requisite shape, mating the metal strip with a carrier strip, exposing at least one side of the metal strip to an etching agent to selectively etch the desired shape, and separating the shape from the strip feedstock. A plurality of layers of the shapes is assembled by adhesive lamination 20 to form a generally polyhedrally shaped bulk amorphous metal magnetic component 10 useful in high efficiency electric motors and inductive devices. The bulk amorphous metal magnetic component may include an arcuate surface, and preferably includes two arcuate surfaces that are disposed opposite to each other. The magnetic component is operable at frequencies ranging from about 50 Hz to about 20,000 Hz. When the component is operated at an excitation frequency "f" to a peak induction level B max , the component exhibits a core-loss less than about "L" wherein L is given by the formula L=0.005 f (B max ) 1.5 +0.000012 f 1.5 (B max ) 1.6 , said core loss, said excitation frequency and said peak induction level being measured in watts per kilogram, hertz, and teslas, respectively. Performance characteristics of the bulk amorphous metal magnetic component 10 of the present invention are significantly better than those of silicon-steel components operated over the same frequency range.
Abstract:
There is disclosed a system and method for transferring power without requiring direct electrical conductive contacts. There is provided a primary unit having a power supply and a substantially laminar charging surface having at least one conductor that generates an electromagnetic field when a current flows therethrough and having an charging area defined within a perimeter of the surface, the at least one conductor being arranged such that electromagnetic field lines generated by the at least one conductor are substantially parallel to the plane of the surface or at least subtend an angle of 45° or less to the surface within the charging area; and at least one secondary device including at least one conductor that may be wound about a core. Because the electromagnetic field is spread over the charging area and is generally parallel or near-parallel thereto, coupling with flat secondary devices such as mobile telephones and the like is significantly improved in various orientations thereof.