Siemens Aktiengesellschaft

Siemens Aktiengesell Schaft

Markus Knorr

Zeljko Jajtic

Dietmar Stoiber

Roland Finkler

Wolfgang Wolter

Georg Schlatterer

Elmar Schäfers

Jens Hamann

Gerhard Matscheko

Johannes Wollenberg

Stefan Schiele

Ralph Burgstahler

Joachim Scharnagl

Jürgen Krejtschi

Roland Schultheiss

Ignacio Diaz Diaz

Wolfram Behr

Hans Ulrich Armeit

Andreas Rust

Hartmut Schirdewahn

Dominik Schury

Stephan Fretzschner

A pump includes a cylinder having a working chamber which contains a fluid. A drive system including at least two linear motors which are connected electrically and/or mechanically in parallel moves a piston in the working chamber to bound the working chamber in the cylinder and to pressurize the fluid in the working chamber. A piston rod is connected to the piston and bundles a force applied by the drive system.

Drive of a pump

A drive for providing high dynamics for a machine, such as a production machine, includes a short-stroke motor, and a pulse-decoupling device for decoupling pulses of the short-stroke motor from the machine using closed-loop control. The pulse-decoupling device has at least one component for use as a working-point adjustment device for adjusting a working point of the short-stroke motor. The pulse-decoupling device is thus able to assume the function of pulse decoupling and in addition, at least partially, the function of working point adjustment.

Drive for a machine with pulse-decoupled working point adjustment

A measurement system for finding the position of a primary part of a linear motor with respect to a secondary part includes an absolute value measurement system for recording a first reference position of the primary part with respect to the secondary part, and an incremental measurement system for recording a fine position of the secondary part relative to the first reference position recorded by the absolute measurement system. The absolute value measurement system includes at least one RFID reader and at least one first RFID tag which is identifiable by the RFID reader, with the first RFID tag intended to identify the first reference position.

Position transmitter system

The invention relates to a short stroke linear motor. In order to improve the dynamics of such a short stroke linear motor, the primary part () of the motor is provided with a single-strand winding. The primary part () and the secondary part () have essentially the same pole pitch (tZ=tM). In this way, a very high motor torque is produced in a limited range of displacement. In order to be able to reach a plurality of working positions without an inactive intermediate position, a short stroke linear motor having a double-strand winding is additionally provided, both strands being operated at a phase difference of &#x3c;90&#xb0;. The pole pitch of the primary part and the secondary part are again essentially the same.

Converter-fed single strand short stroke linear motor

A drive apparatus with at least one synchronous motor, a converter and a mechanical energy buffer able to be fed from an energy supply network, which, for converting mechanical energy into electrical current, includes a first asynchronous machine, and a method of operation for such a drive apparatus are specified, with which or in which the energy buffer, especially its first asynchronous machine is directly electrically connected via a switchover device to the at least one synchronous motor, so that the converter included in the drive apparatus is bypassed for such a switch position of the switchover device and the converter accordingly does not have to be designed for currents which flow in such a switch position of the switchover device.

Drive apparatus and method for its operation

The aim of the invention is to create an inexpensive sensor system for a movable electric machine in order to determine positions, the sensor signal featuring zero crossings. Said aim is achieved by a sensor device () comprising a U-shaped yoke () and a sensor () which is disposed in/on the yoke () to detect a magnetic variable, for example. Magnets (to) that are or can be inversely magnetized are arranged at a free end of the yoke (). Opposite magnetic fluxes that can be detected by the sensor () can be generated in the yoke () in accordance with the position of the magnets (to) relative to one of the pole teeth () of a machine component. Approximately sinusoidal sensor signals can be generated therefrom without having to use several measuring sensors, e.g. in order to regulate a linear motor.

Sensor device for an electric machine

A machine includes a moving part and a direct drive for moving the moving part. The direct drive includes a stator and an armature unit which interacts with the stator. A coupling device couples the armature unit to the moving part to allow a movement of the moving part in relation to the armature unit. The direct drive further includes a spacer device to maintain a distance between an active region of the stator and an active region of the armature unit, thereby defining the air gap between the stator and the armature unit.

Machine with direct drive

The aim of the invention is to simplify and to secure the mounting and adjusting of sensors on built-in motors. As a result, a direct drive built-in motor is equipped with a first motor component () which comprises at least one motor mounting element () for securing the first motor component () to a first machine part (), and a second motor component which cooperates with the first motor component () for carrying out an opposite-sided movement. Also, a sensor device () can be secured to the first motor component (). Said sensor device comprises at least one sensor mounting bore () which is arranged in a predetermined manner through the motor mounting part and can be connected to the first machine part Also, the position and/or orientation of the sensor device () are predetermined in a mounted state on the first machine part ().

Direct-drive built-in motor with special sensor attachment

The aim of the invention is to provide a robust, simple woodworking machine. To achieve this, the invention provides a machine comprising at least one linear direct drive, which contains a primary part () with a first element () for generating a first magnetic field and at least one additional element () for generating an additional magnetic field. The first element () for generating the first magnetic field is positioned, in particular, in such a way in relation to the additional element () for generating the additional magnetic field that the first magnetic field overlaps the additional magnetic field. The machine also comprises a secondary part (), which comprises magnetic return elements and is devoid of magnetic sources. According to the invention, the primary part () and/or the secondary part () is or are suitable for guiding or placing at least one workpiece and/or for guiding and/or placing at least one tool for machining the workpiece.

Woodworking machine with linear direct drive

The aim of the invention is to improve the precision of measuring leakage field sensitive sensors on electric machines. According to the invention, the electric machine comprises a sensor device () which is sensitive to magnetic leakage fields mounted on one of the two active parts () or in a defined relative position in relation to the active parts. A magnetic screening device is arranged between the sensor device () and one of the two active parts (). Also, the magnetic leakage fields no longer have an influence on the sensor device such that measuring precision is increased.

Electric machine comprising a screened leakage-field-sensitive sensor

The invention relates to a speed measurement device () for a permanently excited electric synchronous machine () comprising a first part () and a second part (). The invention also relates to a corresponding method for measuring speed. The second part () of the permanently excited electric synchronous machine comprises permanent magnets (). The speed measurement device () comprises at least one first sensor () and a second sensor (), wherein the first sensor () is provided with a sensor coil and the second sensor () is a Hall sensor and the sensors () on the first part () are arranged in such a way that the first sensor () and second sensor () are influenced by a magnetic field (), which is generated by the permanent magnets (), by means of a flow conducting device () having an integrated character.

Speed measurement for an electrical permanent-magnet synchronous machine

The aim of the invention is the equipping of a synchronous linear motor with a non-permanently-magnetic secondary part with a simple positional measuring system. Said aim is achieved, whereby the tooth structure of the toothed rack-shaped non-permanently-magnetic secondary part (S) varies with position in the direction of movement (B). Furthermore, the synchronous linear motor can be provided with absolute and incremental positional measuring systems, such that the coarse resolution of the absolute measuring system can be supplemented by the fine resolution of the incremental system.

Synchronous linear motor with non-contacting scanning of the toothed structure of the secondary part

A momentum-decoupled drive train for a machine, includes a servo motor, a first drive element and a second drive element. The second drive element is movably supported relative to a machine bed in a movement direction of a machine carriage. Reaction forces which are caused by the movement of the machine carriage, are compensated by a corresponding counter movement of the second drive element or a reaction carriage connected thereto, and hence are not transferred to the machine bed. The position of the machine carriage relative to the machine bed is controlled by correcting the position setpoint value with actual position and velocity data for the reaction carriage relative to the machine bed.

Growing community of inventors

Augsburg, Germany

Markus Knorr