Abstract: A method for monitoring the temperatures of at least two semi-conductor power switches that are arranged on a common cooling body. Temperature detection is carried out by means of a temperature model each allocated to a switch, in which switch and operating parameters as well as temperature measurement values are processed for calculating the temperature and/or a temperature difference in the relevant switch. A temperature measurement value from a temperature sensor is used as an input parameter for the temperature model, the temperature sensor being centrally positioned between at least two switches and standing in a heat conducting connection with the cooling body. A related apparatus is an electronic temperature emitting power switch arrangement, having a temperature sensor positioned centrally between the two or between two switches each, the same being coupled in a heat conducting way with the cooling body and with the output side of the calculator.

Abstract: A method for producing individual material sections, particularly sheets of paper, according to a certain format, from a web-type, for example imprinted object (object web), more particularly a web of paper or material, using a cutting means for cutting off the individual material sections from the object web and then removing said sections from the cutting means, wherein during the course of actuation of the cutting means at least one carrier is engaged with the object web, wherein following the cutting process, the carrier is displaced, together with the object web gripped by said carrier, by means of a controllable linear drive, over a displacement stroke, which is adjusted and/or varied in a controlled manner by the linear drive according to a section format that is predefined for the material section.

Abstract: A method for the identification without shaft encoder of magnetomechanical characteristic quantities of a three-phase asynchronous comprising: —constant voltage impression U1? in ? axial direction in order to generate a constant magnetic flux; —test signal voltage supply U1? in ? axial direction of the asynchronous motor, whereby the ? axial direction remains supplied with constant current; —measuring signal current measurement I1? in ? stator axial direction of the asynchronous motor; —identification of mechanical characteristic quantities of the asynchronous motor based on the test signal voltage U1? and on the measuring signal current I1?, whereby the rotor can execute deflection movements. Method can also be used for control of electrical drives. An identification apparatus for the determination of mechanical characteristic quantities of an asynchronous motor and for motor control, whereby the identified characteristic quantities can be used to determine, optimize and monitor a motor control.

Abstract: A method for the identification without a shaft encoder of magnetomechanical characteristic quantities, in particular the mass moment of inertia J and the permanent magnetic flux ?PM between rotor and stator of a three-phase synchronous motor, comprising:—constant voltage supply U1d in the d flux axial direction;—test signal voltage supply U1q in the q transverse flux axial direction;—measuring signal current measuring I1q of the q transverse flux axial direction;—identification of magnetomechanical characteristic quantities of the synchronous motor on the basis of the test signal voltage U1q and of the measuring signal current I1q; whereby the rotor can execute deflection movements with pre-definable maximal amplitudes. Method use also for control of electrical drives.

Abstract: Identification of electrical equivalent circuit parameters (15) of a three-phase asynchronous motor (09) without a shaft encoder. The method comprises—Assumption of a standstill position of the rotor (11);—Equidirectional test signal infeed U1?, U1? in ? and ? in the stator axis direction of the asynchronous motor (09);—Measuring of a measuring signal I1?, I1? of the ? and ? axial direction of the asynchronous motor (09); and—Identification of equivalent circuit parameters of the asynchronous motor (09) on the basis of the test signal voltages U1?, U1? and of the measuring signal currents I1?, I1?; whereby the test signal feed allows the rotor (11) to remain torque-free. Determination of equivalent circuit parameters (15) of an asynchronous motor (09) as well relates to a motor control device (35), whereby the identified equivalent circuit parameters (15) can be used for the determination, optimization and monitoring of a motor control and for control of electrical drives.

Abstract: Identification without shaft encoder of electrical equivalent circuit parameters of a three-phase asynchronous motor comprising: -standstill position search of the rotor, so that the d flux axial direction of the rotor is aligned opposite the cc axial direction of the stator; -test signal voltage supply U1d in the d flux axial direction of the motor whereby the q transverse axial direction remains without current; -measuring signal current I1d of the d flux axial direction of the motor; -identification of equivalent circuit parameters of the motor based on the test signal voltage U1d and on the measuring signal current I1d in the d flux axial direction; whereby the rotor remains torque-free. The method used to control electrical drives. An identification apparatus for a synchronous motor and a motor control device comprising the apparatus, whereby identified equivalent circuit parameters can be used to determine, optimize and monitor a motor control.

Abstract: A method for automated startup and/or for automated operation of controllers of an electrical drive system with vibrational mechanics with the following steps: (a) determining a preliminary value of at least one parameter; (b) determining a model of the electrical drive system by determination of initially a non-parameterized model through the recording of frequency data during operation of the drive system subject to the utilization of the preliminary value of at least one parameter and the subsequent determination of parameters of the electrical drive system based on the frequency data and subject to optimization of at least one preliminary value of at least one parameter by a numerical optimization method on the basis of the Levenberg-Marquardt algorithm and (c) parameterizing at least one controller of the electrical drive system by at least one of the determined parameters.

Abstract: A method for producing individual material sections, particularly sheets of paper, according to a certain format, from a web-type, for example imprinted object (object web), more particularly a web of paper or material, using a cutting means for cutting off the individual material sections from the object web and then removing said sections from the cutting means, wherein during the course of actuation of the cutting means at least one carrier is engaged with the object web, wherein following the cutting process, the carrier is displaced, together with the object web gripped by said carrier, by means of a controllable linear drive, over a displacement stroke, which is adjusted and/or varied in a controlled manner by the linear drive according to a section format that is predefined for the material section.

Abstract: Identification of electrical equivalent circuit parameters (15) of a three-phase asynchronous motor (09) without a shaft encoder. The method comprises—Assumption of a standstill position of the rotor (11);—Equidirectional test signal infeed U1?, U1? in ? and ? in the stator axis direction of the asynchronous motor (09);—Measuring of a measuring signal I1?, I1? of the ? and ? axial direction of the asynchronous motor (09); and—Identification of equivalent circuit parameters of the asynchronous motor (09) on the basis of the test signal voltages U1?, U1? and of the measuring signal currents I1?, I1?; whereby the test signal feed allows the rotor (11) to remain torque-free. Determination of equivalent circuit parameters (15) of an asynchronous motor (09) as well relates to a motor control device (35), whereby the identified equivalent circuit parameters (15) can be used for the determination, optimization and monitoring of a motor control and for control of electrical drives.

Abstract: Identification without shaft encoder of electrical equivalent circuit parameters of a three-phase asynchronous motor comprising: standstill position search of the rotor, so that the d flux axial direction of the rotor is aligned opposite the ? axial direction of the stator; test signal voltage supply U1d in the d flux axial direction of the motor whereby the q transverse axial direction remains without current; measuring signal current I1d of the d flux axial direction of the motor; identification of equivalent circuit parameters of the motor based on the test signal voltage U1d and on the measuring signal current I1d in the d flux axial direction; whereby the rotor remains torque-free. The method used to control electrical drives. An identification apparatus for a synchronous motor and a motor control device comprising the apparatus, whereby identified equivalent circuit parameters can be used to determine, optimize and monitor a motor control.

Abstract: A method for the identification without a shaft encoder of magnetomechanical characteristic quantities, in particular the mass moment of inertia J and the permanent magnetic flux ?PM between rotor and stator of a three-phase synchronous motor, comprising: —constant voltage supply U1d in the d flux axial direction; —test signal voltage supply U1q in the q transverse flux axial direction; —measuring signal current measuring I1q of the q transverse flux axial direction; —identification of magnetomechanical characteristic quantities of the synchronous motor on the basis of the test signal voltage U1q and of the measuring signal current I1q; whereby the rotor can execute deflection movements with pre-definable maximal amplitudes. Method use also for control of electrical drives.

Abstract: A method for the identification without shaft encoder of magnetomechanical characteristic quantities of a three-phase asynchronous comprising: constant voltage impression U1? in ? axial direction in order to generate a constant magnetic flux; test signal voltage supply U1? in ? axial direction of the asynchronous motor, whereby the ? axial direction remains supplied with constant current; measuring signal current measurement I1? in ? stator axial direction of the asynchronous motor; identification of mechanical characteristic quantities of the asynchronous motor based on the test signal voltage U1? and on the measuring signal current I1?, whereby the rotor can execute deflection movements. Method can also be used for control of electrical drives. An identification apparatus for the determination of mechanical characteristic quantities of an asynchronous motor and for motor control, whereby the identified characteristic quantities can be used to determine, optimize and monitor a motor control.

Abstract: The invention relates to a circuit arrangement for recirculating the energy produced during the braking of electric motors into a supply system. The object of the invention is to implement the feeding of the energy that can be obtained when braking electric motors to the supply system without the use of an isolating transformer. Said object is solved by a forward branch (3), comprising a rectifier (32) connected to the supply system (1). The rectifier is guided via a first intermediate circuit (33) to a first inverter (34) that is connected to the motor (2), and a backward branch (4), comprising a second intermediate circuit (42) connected to the output of the first intermediate circuit (33), wherein a second inverter (41) is connected to the second intermediate circuit, and the second inverter in turn is connected to the supply system (1) via a mains circuit (5).

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: Method for detecting and/or monitoring the temperatures of at least two electronic power switches, in particular semi-conductor power switches that are coupled with or arranged on a common cooling body, whereby a temperature detection and/or monitoring is carried out by means of a temperature model each allocated to a switch, in which switch and operating parameters as well as temperature measurement values are processed for calculating the temperature and/or a temperature difference in the relevant switch, whereby a temperature measurement value from a temperature sensor is used as an input parameter for the temperature model, the same being centrally positioned between at least two switches and standing in a heat conducting connection with the cooling body.

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: The invention relates to cooling jackets and/or heat exchangers, which are to be placed in contact with solid products that are to be cooled, especially with electrical machines with a rotor rotating inside or outside a stator, or in contact with reactors or containers. Said jackets and/or heat exchangers have an inner wall and an outer wall which form the boundary of a flow cavity that is provided with inlet and outlet means for a cooling medium and conducting means in order to form and/or limit at least one flow path for the cooling medium between the inner wall and the outer wall from the inlet means to the outlet means. According to the invention, opposing individual flat places or flat sections of the inner wall and the outer wall are in contact with one another within the confines of said walls and passages for the cooling medium remain between the contacting flat places of flat sections.

Abstract: Method for the automated startup and/or for the automated operation of controllers of an electrical drive system with vibrational mechanics with the following steps: Determination of a preliminary value of at least one parameter, Determination of a model of the electrical drive system by means of the determination of initially a non-parameterized model through the recording of frequency data during operation of the drive system subject to the utilization of the preliminary value of at least one parameter and the subsequent determination of parameters of the electrical drive system based on the frequency data and subject to the optimization of at least one preliminary value of at least one parameter by means of a numerical optimization method on the basis of the Levenberg-Marquardt algorithm and Parameterization of the plurality of or at least one controller of the electrical drive system by means of at least one of the determined parameters.