Ebm-papst Mulfingen Gmbh & Co Kg

Ebm Werke Gmbh & Co.

Ebm Werke Gmbh & Co. Kg

Ebm Werke Gmbh & Co. Kb

Ebm-papst Landshut Gmbh

Jens Krotsch

Gerhard Huth

Andr&aacute;s Lelkes

Thomas Ley

Sebastian Schroth

Walter Hofmann

Christian Hammel

Martin Baer

Christian Pfaff

Hans-Joachim Klink

Martin Hertreiter

Martin Baun

Tobias Ehmann

Mark Heinze

Reinhard Stillger

Roland Erneker

Reinhold Gerner

Thomas Kilian

Ante Skocic

Otmar Hügel

Hiren Gondaliya

Markus Neber

Jiawei He

Jochen Rittmaier

Daniel Kreuzer

Waldemar Faber

Constantin Reiss

A 3-strand rotating field machine with a 2p-pole stator with winding teeth (Z), formed with a winding arrangement in tooth coil technology, has three winding strands (W, W, W). The winding arrangement is formed from wound coil groups (G) with coils that are multiply interleaved. The partial coils (T) of the coil groups (G) are arranged so they concentrically enclose one another from inside to outside and surround two or more winding teeth (Z). The respective coil winding numbers in the grooves (N) between the winding teeth (Z) are provided. Thus, in each case a substantially equal occupancy of each groove (N) is provided with the same effective total conductor cross section of the coils per groove cross section.

Multi-tooth coil winding for a three-phase rotating field machine

A control device () is configured to reduce the commutation angle error &#x3b5; of a three-phase (u, v, w) EC motor () connected via a y-configuration. The three phases (u, v, w) are commutated via a motor control () including a rotor position sensor () and a control circuit (). The rotor position sensor () senses the relative angular position of the rotor using the neutral-point potential at the neutral point of the y-configuration. The control circuit () is configured to impose a desired field weakening current component on the motor control () for reducing the commutation angle error &#x3b5;.

Control device and method for reducing the commutation angle error of an EC motor

The invention relates to a device for reducing harmful bearing voltages in an electrical machine (M) fed by a DC link voltage of a DC link, said electrical machine comprising a stator (), which has windings () and is insulated from ground (GND), and a rotor () and a motor shaft, wherein furthermore a rotor-side bearing (LA) and a stator-side bearing (LA) are each insulated from the ground (GND) and the rotor () and the stator () are electrically connected to each other by means of a bypass capacitance (C) having a predefined capacitance.

Device for reducing harmful bearing voltages

The invention relates to a double-phase rotating field machine having a 2p-pole stator with winding teeth (Z), which is designed with a winding arrangement in tooth coil technology, comprising two phase windings (W, W, W), wherein the winding arrangement is formed from wound coil groups (G) with coils nested in one another several times, wherein the coil sections (T) of said coil groups (G) are arranged concentrically surrounding one another from the inside to the outside, and comprise two or a plurality of winding teeth (Z), wherein the respective coil winding numbers are arranged in the grooves (N) between the winding teeth (Z) such that in each case an essentially uniform coating of each groove (N) with the same effective total conductor cross section of the coils per groove cross section is given.

Multi-tooth coil winding for a double-phase rotating field machine

The invention relates to a stator active part for an electric motor, preferably a permanent-magnet-excited synchronous machine consisting of a hollow-cylindrical yoke, comprising an inner cladding and having a receptacle space, into which a coil support is inserted, wherein the coil support consists of a peripherally-closed, hollow-cylindrical tubular body extending in the axial direction (A) of the yoke, on the outer cladding of said body a plurality of coil holders being formed, wherein a finely-distributed coil is installed on each coil holder.

Stator of a rotating field machine

A three-phase machine with a 2-pole stator () formed with a winding arrangement of a double-layer tooth-wound coil winding has m winding phases (U, V, W). The winding arrangement has at least one first double-layer tooth-wound coil () and one second double-layer tooth-wound coil (). Each tooth-wound coil occupies a half of each of four respective adjacent slots (N) of the stator () with a winding phase (W). Each double-layer tooth-wound coil () forms two concentrically arranged coils. The second double-layer tooth-wound coil () is arranged such that it is shifted by a pole pitch with respect to the first double-layer tooth-wound coil ().

Winding arrangement for a three-phase machine

The invention relates to a method for sensor-free position determination of the rotor position of an electronically commutated multiple-phase EC motor comprising a rotor, and a stator and comprising a commutation device for generating string currents in the coil system of the stator by applying a test signal in the coil system, measuring the current value i in the strand during the measurement phase (PHMess) as a current response to the test signal, calculating i for determining the envelope determining of the current response and determining the rotor position therefrom.

Method for sensor-free determination of the rotor position of electronically commutated multiple-phase synchronous machines

A rotating electric machine () having a stator () in a housing () and a rotor () supported by a shaft (). The housing () circumferential wall () and first and second axially opposing end walls () support bearing flanges with bearings () for the shaft (). Two cooling fan impellers () are connected to the shaft (). An inner cooling fan impeller () positioned inside the housing () generates an inner cooling air circuit (A) inside the housing (). An outer cooling fan impeller () provided outside the housing (), generates an outer cooling air flow (B). The first end wall () is formed with a thermal conductivity of at least a specified value and has an outer cooling rib geometry () on its outer side facing the outer cooling fan impeller (), and an inner cooling rib geometry () on its opposing inner side.

Rotating electrical machine

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

Permanent magnet excited electric motor with reduced cogging torque

The invention relates to an electrical circuit arrangement for driving switching power semiconductor components at high voltage potential with a control signal predetermining a switching information for the power semiconductor component and an output voltage directly controlling the power semiconductor component. A non-controllable semiconductor valve is used as component with high dielectric strength for transferring the switching energy and the switching information.

Circuit arrangement for driving an electrical circuit breaker at high voltage potential

System for the electronic commutation of a brushless DC motor

The invention relates to a mains-commutated, synchronous AC motor ( ) with permanent-magnet excitation, which is configured as an external-rotor motor with a permanent-magnet external rotor ( ) which rotates around an inner stator. In this case, an electronic starting apparatus ( ) is provided which actuates the stator ( ) in order to start the external rotor ( ) in such a manner that the external rotor ( ) is accelerated in a controlled manner to its synchronous rotation speed, and then continues to run in the mains-commutated synchronous mode.

Synchronous AC motor

The present invention relates to a system for controlling the rotation speed of AC motors, in particular single phase motors. In this case, a controllable electronic switching device is connected upstream of the motor and is actuated by a control unit such that a sinusoidal input AC voltage is used to produce a motor AC voltage which can be varied in order to change the rotation speed. The control unit is designed in such a manner that the fundamental frequency and/or the amplitude of the motor AC voltage can be varied by phase gating.

Growing community of inventors

Niederstetten, Germany

Jens Krotsch