Abstract: A method for identification of an electric drive system to be modeled as a multimass oscillator and/or for detection of damages in bearings and/or on elements susceptible to wear in an electric drive system, whereby a mechanical angular velocity of the electric drive system is determined in a sensorless method as part of the present method, and signal processing is performed on the basis of correlograms and/or Welch's method, using the mechanical angular velocity determined without a sensor, such that the frequency response of the mechanics of the electric drive system is determined as part of the signal processing, the data thereof being used for determination of at least one parameter of the electric drive system.

Abstract: A coolable housing shell for an electric machine, which is produced as a cast part, accommodates a concentric interior rotor/stator arrangement, coils, and end windings, and comprises a clear, open, through passage that is embodied in a symmetric, concentric, and/or coaxial manner relative to an imaginary axis of rotation of the machine. Said housing shell is interspersed with one or several cooling channels so as to form a coolant circuit. The inner surfaces of the shell and the inner walls of the channel/s have a coating via a cathodic dipping varnish method.

Abstract: A field-oriented control method for an electric drive comprising a plurality of electric motors, for implementing a tension mechanism, especially for load cable and/or gearing means, using measurements of a polyphase motor actual current. The measured values are transformed into a direct current component and a quadrature current component, based upon a magnetic rotor field or flux angle, in a rotor flux-based d,q coordinate system. The quadrature and direct current components from the actual current are subjected to a comparison with predetermined quadrature and direct current components of a current command value.

Abstract: Procedure for determining the electrical drive speed (?ef) and/or position (?e) in a permanent magnet rotor of a brushless electrical linear or rotation machine from a measurement of a multi-phase stator current (i1,i2) especially for an electrical drive regulation circuit, a) whereby the speed is seamlessly determined over the entire speed range, including standstill of the rotor, b) while using a mathematical rotor model (9) suitable for higher speeds, whereby from the influence of a rotor back EMF that affects the stator current (i1,i2) conclusions are made about the rotor speed (?ef) and/or position (?e) and an appropriate model speed value (13,19,23) is generated, c) and while using an injection procedure (32) suitable for lower speeds up to and including standstill, whereby a current-carrying stator winding is coupled with a test signal source (36, 37) and the resulting stator currents (i1,i2) are assessed and/or filtered for position-sensitive anisotropies in the magnetic structure of the electrical

Abstract: Procedure for estimating the electrical drive speed and position of a permanent magnet rotor of a brushless electrical linear or rotating motor, especially for a drive control circuit, using multi-phase current measurements on the motor, whose measurement values, depending on the estimated position, are transformed into a rotor-related d,q reference frame i.e.

Abstract: A cooled stator for an electric machine including a rotating rotor wherein the stator comprises an electric sheet metal stack and one or more flexible, deformable cooling channels for guiding the flowing cooling medium in a liquid or gas form, reacting with the stacks. The one or more cooling channels being formed from one or more flexible corrugated hoses made of metal.

Abstract: An electrical drive system for angular positioning of one or several rotating and/or tilting machine components and equipment components, particularly of printing machines, including at least one electric motor having a rotor designed for rigid and direct coupling to the component, further including by one or several angle encoders for registering the angular motion of the rotor of the electric motor and/or the component, a signal processing module which receives the actual angle position signals from the angle encoder or encoders and which also receives the setpoint data for comparison with the actual data, and a power amplifier controlled by the signal processor and used for driving the electric motor.

Abstract: Process for the measurement of the absolute position of the movable, cyclic division mark carrier of an incremental position indicator or rotation indicator/resolver within and/or with regard to one of its divisional segments, periodically formed and/or delimited by the division marks on the carrier, with two scanning elements, stationarily arranged and addressing the division marks, which are positioned at such a distance from one another along the length or periphery of the segment that they deliver two sine- and cosine-like measurement signals which are evaluated on the basis of the arctangent function for position determination, by utilizing the values or components of a parameter vector identifying the measurement process, which is continuously redetermined during the measurement operation according to preset optimization criteria, for correction of the evaluation for disturbances and inaccuracies in the position indicator.

Abstract: An electrical drive system for angular positioning of one or several rotating and/or tilting machine components and equipment components, particularly of printing machines, including at least one electric motor having a rotor designed for rigid and direct coupling to the component, further including by one or several angle encoders for registering the angular motion of the rotor of the electric motor and/or the component, a signal processing module which receives the actual angle position signals from the angle encoder or encoders and which also receives the setpoint data for comparison with the actual data, and a power amplifier controlled by the signal processor and used for driving the electric motor.