Robert Boschgmbh

Elliptec Resonant Actuator Ag

Dieter A Schuler

Peter Christian Varadi

Bjoern B Magnussen

Benjamin Hagemann

Yannick Chauvet

Andreas Hempel

Andreas Kneer

Gerald Kuenzel

Erick Mathew Davidson

Markus Ditlevsen

Dieter Elshuber

Eberhard Schnaibel

Rudi Mayer

Wolfgang Winkler

Bernd Wichert

Thomas Golzer

Bernhard Ebinger

Charlotte Summerer

Armin Mann

Erick Davidson

Lena Behelfer

Kai Wolf

Björn B Magnussen

Björn Magnussen

A method for transmitting data from an actuator to a control unit controlling the actuator. The control unit controls a piezoelectric element contained in the actuator. In order to transmit the data, in the actuator, a load being or not being connected in parallel with the piezoelectric element.

Method for transmitting data from an actuator to a control unit, corresponding actuator, and corresponding control unit

A method for transferring data from an actuating element to a control unit activating the actuating element. The control unit activates an inductance contained in the actuating element, for the transfer of the data in the actuating element in parallel to the inductance, a load being connected in parallel, or not.

Method for transferring data from an actuating element to a control unit, corresponding actuating element and corresponding control unit

The invention relates to a thrust washer () for an electric machine () intended to be arranged on a shaft () between a bearing () and a rotor (), preferably a rotating electrical contact element () impacted by brushes (), and/or a disk pack () of the rotor (). The thrust washer () is provided with an area for sealing having two end faces (). On each end face (), at least one radial abutment section () for the bearing (), or the rotor (), is provided. The thrust washer () according to the invention is characterized in that it is made of at least one hard component () and one soft component (), wherein the part of the radial abutment section () abutting the rotor () and/or the bearing () is formed by the soft component ().

Thrust washer for an electric machine

The invention relates to a piezoelectric motor comprising a piezoelectric component that is connected to a resonator and a two-dimensional resonator that interacts with a movable. element, the resonator having principal surfaces that are parallel to each other and that are also identical in shape and size. The invention further relates to methods for producing such piezoelectric motors, wherein the resonators are manufactured by cutting a profiled, extruded bar into lengths or by cutting, preferably by punching, from sheet metal having constant thickness. Finally, this invention relates to a method for exciting such a piezoelectric motor, wherein the excitation frequency or frequencies is/are generated by the control electronics as a function of time in response to the respective peak current and/or in response to the respective phase minimum between current and voltage and/or in response to the change in phase.

Piezoelectric motors and methods for the production and operation thereof

The present invention relates to a drive system comprising at least one motor with at least one vibration generator each as well as at least one resonator each and a device driven by said motor, wherein the resonator comprises a contact area that cooperates with the surface of the device in order to drive said device.

Piezomotor with a guide

A piezoelectric system has a piezoelectric motor () driving a driven element () so as to move the driven element () in response to an electric signal (). The motor () has at least a first optimal operating frequency at which the motor () moves the driven element () an amount that meets predetermined criteria. The motor () and driven element () have a desired performance criteria when operated at that first operating frequency. A plurality of concatenated sinusoidal sweeping frequencies are repeatedly supplied to the piezoelectric motor () with at least one of the sweeping frequencies being sufficiently close to the first operating frequency to cause detectable motion of the driven element (). The frequencies are varied in response to movement of at least one of the motor () and the driven element () to produce an average performance of the motor () and driven element () for a time corresponding to the time for one sweep of frequencies. The average performance is greater than an actual performance of the driven element () for the same period of time but when the actual performance is less than the desired performance.

Piezoelectric motor control

A single piezoelectric is excited at a first frequency to cause two vibration modes in a resonator producing a first elliptical motion in a first direction at a selected contacting portion of the resonator that is placed in frictional engagement with a driven element to move the driven element in a first direction. A second frequency excites the same piezoelectric to cause two vibration modes of the resonator producing a second elliptical motion in a second direction at the selected contacting portion to move the driven element in a second direction. The piezoelectric is preloaded in compression by the resonator. Walls of the resonator are stressed past their yield point to maintain the preload. Specially shaped ends on the piezoelectric help preloading. The piezoelectric can send or receive vibratory signals through the driven element to or from sensors to determine the position of the driven element relative to the piezoelectric element or resonator. Conversely, the piezoelectric element can receive vibration or electrical signals passed through the driven element to determine the position of the driven element. The resonator is resiliently urged against the driven element, or vice versa. Plural resonators can drive common driven elements.

Vibratory motors and methods of making and using same

An electric motor having a housing, having an armature, having an armature shaft supported in two slide bearings, where one of the slide bearings axially displaceably receives the armature shaft and the other slide bearing limits an axial displaceability of the armature shaft by the disposition of a stop disk between a slide bearing bush of the slide bearing and the armature, by the disposition of an axial stop, in the form of a stop ring pressed over one end of the armature shaft. The armature shaft end protrudes out of the housing and is intended for carrying and driving a fan wheel that has a hub which is located adjacent the particular a slide bearing that receives only radial forces. The armature shaft end that carries the fan wheel is associated with the particular slide bearing that is designed as a bidirectionally acting axial bearing, and the hub of the fan wheel is brought so close to a face-end running face of the slide bearing bush that this hub on its face end forms an axial stop of the axial bearing. As a result, a special stop ring is unnecessary.

Electric motor and fan wheel combination, and method for producing it

Electronic control system for fuel metering in an internal combustion

Growing community of inventors

Stuttgart, Germany

Dieter A Schuler