Robert Boschgmbh

Gunther Goetting

Daniel Raichle

Markus Kretschmer

Lei Chen

Tino Merkel

Sebastian Paulus

Martin Eisenhardt

Dragan Mikulec

Mark Damson

Stefan Blind

Lanouar Chouk

Mykhaylo Klymenko

Yuping Chen

Michele Hirsch

Torsten Heidrich

Roland Schleser

Jochen Kuehner

Thomas Wenzler

Falco Sengebusch

Hans-Peter Groeter

Manfred Stahl

Mercedes Herranz Gracia

Michael Bildstein

Beqir Pushkolli

Alexander Scheidle

Thomas Wiecha

Stephan Hanel

Markus Peter

Eckart Mayer-John

Kay Hindorf

Michael Mecks

Stefan Spannhake

Mario Beyer

Christian Lingenfelser

Phillip Wagner

Raimundo Varas Manso

Stefan Kolmorgen

Yves Challand

Georg Schneider

Philipp Wagner

The invention relates to a method for operating an electric machine () comprising a rotatably mounted rotor and a motor winding that is electrically connected to an electrical energy store () by means of a power electronics (). In said method, the machine () and/or an apparatus comprising the machine () is/are monitored in respect of fault events, and the motor winding is short-circuited by triggering the power electronics () upon detection of a fault event. According to the invention, a desired trajectory (T) for an actual current vector (i) of an electric motor current flowing through the motor winding is ascertained, said desired trajectory (T) extending from a current actual working point (AP) of the machine () to a short-circuit working point (AP) of the machine (), a pilot control action is predicted according to the desired trajectory (T), and the power electronics () are triggered to short-circuit the motor winding according to the pilot control action in such a way that when the motor winding is short-circuited, a curve (V) of the actual current vector (i) at least substantially matches the desired trajectory (T).

Method for operating an electric machine, device for operating an electric machine, and electric drive system

A method () for calibrating an offset angle (PhiO) for field-oriented control of an electric machine () between an angle signal (W) of a position encoder () and the direction of the rotor flux (RF), having the steps of: periodically varying () a current vector (Is) along a line of constant torque; ascertaining () a speed signal (n_t) of the position encoder () of the electric machine (); calibrating () the offset angle (PhiO) on the basis of the ascertained speed signal (n_t).

Method and device for calibrating an offset angle

The invention relates to a method for calibrating the control of an electrical machine, comprising the steps of: applying at least one electrical test signal having a specified direction in a d-q coordinate system to the electrical machine; measuring the change in the rotor angle of a rotor of the electrical machine according to the applied at least one electrical test signal; and calibrating the control of the electrical machine, the control being carried out using the d-q coordinate system, and the orientation of the d-q coordinate system being determined on the basis of the measured change in the rotor angle of the rotor of the electrical machine.

Method and device for calibrating the control of an electric machine

The invention relates to a method for determining a gain error of at least one current measuring device () of a sensor unit () of an electric machine (), wherein the machine () has a stator winding () having at least three phases (U, V, W) and a rotor () which is mounted so as to be rotatable about an axis of rotation (). According to the invention, an electric sensor voltage () is applied to the phases (U, V, W), the sensor voltage () having at least a first voltage pulse () of a first voltage vector and a second voltage pulse () of a second voltage vector, the first voltage vector and the second voltage vector being oriented in different directions in each case perpendicularly to the axis of rotation (), at least one first current value of a first of the phases (U), at least one second current value of a second of the phases (V) and at least one third current value of a third of the phases (W) are detected during the application of the sensor voltage (), a sum current vector is determined on the basis of the detected current values of all of the phases (U, V, W), and the sum current vector is compared with at least one determined or stored reference current vector, at least one gain error being determined on the basis of the comparison.

Method for determining a gain error of a current measuring device

The invention relates to a method for operating an electric machine (), and to a control device () that is configured to carry out the method. The method comprises a normal mode (&#x3c8;) and a special mode (&#x3c8;) in dependence on a preset target value (M), wherein the normal mode (&#x3c8;) comprises the steps of detecting an operating state, wherein, in the event that the detected operating state is a special state, the special mode (&#x3c8;) is carried out. The special mode (&#x3c8;) comprises the steps of modulating a cyclic value (M) on the present target value (M) and detecting the operating state, wherein, in the event that the operating state is a normal state, the normal mode (&#x3c8;) is carried out.

Method for operating an electric machine

The present invention relates to a control system () for an electric machine (EM), for producing a braking torque, by means of the electric machine (EM), in a traction drive, said system comprising a control device (SE), the control device (SE) being configured to control a generator voltage or a generator current in or through a power electronics system (LE) of the electric machine such that during a movement of the traction drive, the electric power (Pel) of the electric machine (EM) can be limited to a level at least below a predefined minimum value.

Control system for an electric machine for producing a braking torque by means of the electric machine, and method for operating a control system for an electric machine

The invention relates to a method for determining the position (&#x398;) and the rotational speed (n) of a rotor of an electrical machine during an active short circuit and a rotor-state determining device () designed to carry out the method. The method comprises the steps of determining the short circuit currents (I, I, I) resulting during the short circuit, determining a total current (I, I) resulting from the short circuit currents (I, I, I), determining a stator current angle (&#x3c8;) of the total current (I, I) with respect to a stator coordinate system (&#x3b1;, &#x3b2;), determining a rotor current angle (&#x3c6;) of the total current (I, I) with respect to a flux direction (d) of the rotor, this step comprising the steps of calculating an amount variable (I) of the total current (I, I), determining the rotor current angle (&#x3c6;) on the basis of a characteristic dependence between the amount variable (I) and a rotor current angle (&#x3c6;), which dependence is created for the electrical machine, the rotor position (&#x398;) corresponding to a sum of the stator current angle (&#x3c8;) and the rotor current angle (&#x3c6;), and the rotor rotational speed (n) resulting from monitoring of the rotor position (&#x398;).

Method and device for determining the position and the rotational speed of a rotor of an electric machine

The present invention discloses a method for determining a rotor angle of a rotor of an electric machine, having the steps of producing a torque-dependent test signal which depends on the torque of the electric machine and has a higher frequency than a supply signal for the electric machine, controlling the electric machine using the supply signal and the test signal which is superimposed on the supply signal, recording phase currents of the electric machine, and determining the rotor angle of the rotor of the electric machine on the basis of the effects of the test signal on the phase currents. The present invention also discloses an angle determination apparatus and a corresponding control apparatus.

Method, angle determination apparatus and control apparatus

The invention relates to a method for measuring the torque of a drive unit (), particularly a vehicle drive unit (), said drive unit () comprising at least one bearing () for connecting to a fixed support point (), and at least one sensor () being provided which measures a change in force and/or position, particularly a relative rotation of the drive unit (), as a sensor value, wherein a torque at the drive unit () is determined as a measurement value on the basis of said sensor value.

Method for measuring torque of a drive unit

The invention is a pulse-controlled inverter with one or more semiconductor switches and freewheeling diodes arranged in parallel to each semiconductor switch. The semiconductor switches are triggered only when the current does not flow through a freewheeling diode that is arranged in parallel to the semiconductor switch. This allows the number of triggering processes for the semiconductor switch to be reduced. The reduced number of triggering processes for the semiconductor switches results in lower power losses and an increased service life of the entire system.

Power converter and method for operating a power converter to minimize a number of triggering processes of a semiconductor switch

The invention relates to a control device for an electric machine with a stator and a rotor, comprising a temperature detection device which is designed to detect the temperature of the stator and the temperature of the rotor, as well as a calculation device which is designed to adjust the operating point of said electric machine on the basis of a specified torque, the detected temperature of the stator, the detected temperature of the rotor, and a predefined thermal load distribution of said stator and rotor. The invention also relates to a vehicle and to a corresponding method for controlling an electric machine.

Control device for an electric machine, a vehicle, and a method

The invention relates to a method for operating an electric machine (), in particular of a motor vehicle (), having a stator () with at least one stator coil. The stator coil is energized in order to set a required torque of the electric machine (), and a temperature of the stator () of the electric machine () is detected by means of a temperature sensor (). The current flowing through the stator coil is monitored in order to plausibility-check the detected temperature. In order to plausibility-check the temperature, the current in the stator coil is increased while maintaining the same torque, and the temperature is monitored for a temperature increase.

Method and device for operating an electric machine, and motor vehicle

The invention relates to a method () for the active damping control for an electric vehicle or hybrid vehicle having an electric motor drive element (), comprising the steps of receiving a current target torque value (tq) of the electric motor drive element (), determining a current rotational angle value (&#x3c6;) of the electric motor drive element (), and determining a current damping torque value (tq), characterized in that the current damping torque value (tq) is determined using a reduced drive train model (rTSM).

Active damping control for an electric vehicle or hybrid vehicle

A method and a device for operating an electrical machine having separate excitation, especially a synchronous machine. With the aid of a sensor system, a variable characterizing a rotor temperature and/or a stator temperature are/is determined, and an excitation current and stator currents for the electrical machine are specified by a control unit as a function of the variable characterizing the rotor temperature and/or the stator temperature, at least in specifiable operating ranges.

Method and device for operating an electrical machine having separate excitation

The invention relates to a method for operating a synchronous machine, comprising the following steps: determining a difference value between the rotor inductance of the synchronous machine in the polar axis direction and the rotor inductance of the synchronous machine in the pole-gap direction for each of a plurality of different 2-tuples from values of useful current adjusted in the rotor-fixed coordinate system of the synchronous machine; preparing a characteristic diagram for the determined difference values in dependence on the 2-tuples of the values of useful current; determining a torque-dependent operating-point trajectory for the 2-tuples of the values of useful current taking into account the magnitude of the determined difference values along the operating-point trajectory to be determined; and operating the synchronous machine according to the determined operating-point trajectory.

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Stuttgart, Germany

Gunther Goetting