Abstract: A method for determining a rotational angle position of a rotor of a multiphase electrical machine, includes the steps of: generating phase voltages for the multiphase electrical machine by pulse width modulation in accordance with a drive voltage vector circulating in a stator-fixed coordinate system.

Abstract: A method for determining current-dependent and/or rotational angle position-dependent characteristic variables of an electrical machine by setting a rotational angle position of blocking a rotor, forming a series current desired value using a series current desired value alternating signal which changes periodically and/or forming a parallel current desired value using a parallel current desired value alternating signal which changes periodically, regulating a series current using the series current desired value and/or a parallel current using the parallel current desired value, measuring phase currents of the electrical machine and determining an established series current and/or an established parallel current, producing series setting voltage coefficients and series current coefficients and/or parallel setting voltage coefficients and parallel current coefficients using a discrete Fourier transform algorithm, and calculating characteristic variables on the basis of series setting voltage coefficients and

Abstract: A Vernier external rotor machine for direct drive of a load is provided. The Vernier external rotor machine includes an external rotor configured to mechanically directly drive to a load.

Abstract: A drive system has an electric motor, wherein the electric motor includes a first three-phase stator winding system and a second three-phase stator winding system. The first and the second stator winding system are arranged on the stator in a manner rotated through an electrical phase angle in relation to one another. The drive system includes a frequency converter, wherein the frequency converter has a first bridge circuit arrangement which is designed to generate voltages for the first winding system and a second bridge circuit arrangement which is designed to generate voltages for the second winding system. The first bridge circuit arrangement and the second bridge circuit arrangement are connected in series. A control device is designed to actuate the first bridge circuit arrangement and the second bridge circuit arrangement.

Abstract: A Vernier external rotor machine for direct drive of a load is provided.

Abstract: A drive system has an electric motor, wherein the electric motor includes a first three-phase stator winding system and a second three-phase stator winding system. The first and the second stator winding system are arranged on the stator in a manner rotated through an electrical phase angle in relation to one another. The drive system includes a frequency converter, wherein the frequency converter has a first bridge circuit arrangement which is designed to generate voltages for the first winding system and a second bridge circuit arrangement which is designed to generate voltages for the second winding system. The first bridge circuit arrangement and the second bridge circuit arrangement are connected in series. A control device is designed to actuate the first bridge circuit arrangement and the second bridge circuit arrangement.

Abstract: Method for determining current-dependent and/or rotational angle position-dependent characteristic variables of an electrical machine, in particular for performance by an inverter has the steps of: setting a rotational angle position of a rotor of the electrical machine and then blocking the rotor, forming a series current desired value by adding a series current desired value operating point and a series current desired value alternating signal, wherein the series current desired value alternating signal changes periodically with a series current desired value frequency, and/or forming a parallel current desired value by adding a parallel current desired value operating point and a parallel current desired value alternating signal, wherein the parallel current desired value alternating signal changes periodically with a parallel current desired value frequency, regulating a series current to the series current desired value and/or regulating a parallel current to the parallel current desired value, wherein,

Abstract: A method is provided for generating a digital signal from an analog signal generated using a frequency converter on the basis of pulse width modulation with a variable period duration, values of the digital signal corresponding to an average value of the analog signal over an associated period duration of the pulse width modulation.

Abstract: A method is provided for generating a digital signal from an analog signal generated using a frequency converter on the basis of pulse width modulation with a variable period duration, values of the digital signal corresponding to an average value of the analog signal over an associated period duration of the pulse width modulation.

Abstract: The invention relates to a method for the open-loop or closed-loop control of an asynchronous machine with or without speed feedback, the asynchronous motor being controlled by a control device (converter or servo converter). First of all, a voltage vector rotating at a rotary field frequency is specified and impressed, both the rotary field frequency and the voltage vector being determined by an open-loop or closed-loop control based on a voltage-frequency characteristic curve configured in any manner and the voltage vector being adapted by a cos ? closed-loop control. Desired values of cos ? are calculated using rating plate data and equivalent circuit diagram data for an optimum-loss or loss-optimized operation of the asynchronous machine for the calculation of cos ?desired value, which results in optimized-loss operation. A value for cos ?actual is then determined using the impressed voltage vector and a current vector or using the real power and apparent power.

Abstract: The invention relates to a method for the open-loop or closed-loop control of an asynchronous machine with or without speed feedback, the asynchronous motor being controlled by a control device (converter or servo converter). First of all, a voltage vector rotating at a rotary field frequency is specified and impressed, both the rotary field frequency and the voltage vector being determined by an open-loop or closed-loop control based on a voltage-frequency characteristic curve configured in any manner and the voltage vector being adapted by a cos ? closed-loop control. Desired values of cos ? are calculated using rating plate data and equivalent circuit diagram data for an optimum-loss or loss-optimised operation of the asynchronous machine for the calculation of cos ?desired value, which results in optimised-loss operation. A value for cos ?actual is then determined using the impressed voltage vector and a current vector or using the real power and apparent power.

Abstract: Exemplary embodiments provide a method for connection or application of a converter to a rotating asynchronous machine which is operated without an encoder, without a high current and without a torque surge. The method provides a control unit, using an inverter or converter, for feeding the asynchronous machine which rotates at a mechanical rotary speed. The asynchronous machine is regulated by the control unit. A stator current vector is ascertained from measured currents of the stator windings of the asynchronous machine and a rotating stator voltage vector. Calculation is effected in respect of a stator flux change vector from the stator current vector, the stator voltage vector and a stator resistance in accordance with a motor model. An angle difference between the stator current vector and the stator flux change vector is calculated.

Abstract: Exemplary embodiments provide a method for connection or application of a converter to a rotating asynchronous machine which is operated without an encoder, without a high current and without a torque surge. The method provides a control unit, using an inverter or converter, for feeding the asynchronous machine which rotates at a mechanical rotary speed. The asynchronous machine is regulated by the control unit. A stator current vector is ascertained from measured currents of the stator windings of the asynchronous machine and a rotating stator voltage vector. Calculation is effected in respect of a stator flux change vector from the stator current vector, the stator voltage vector and a stator resistance in accordance with a motor model. An angle difference between the stator current vector and the stator flux change vector is calculated.