Robert Boschgmbh

Robert Bosch Gmbh

Lei Chen

Gunther Goetting

Sebastian Paulus

Benjamin Lechner

Michael Mueller

Miriam Riederer

Yuping Chen

Christoph Schuster

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

Signal processing for determining a rotor position without the use of encoders. To this end, test signals are applied to the electrical currents in the phase connections of an electric machine, and the total currents in the phase connections of the electric machine are measured. The current responses to the test signals are determined by establishing the difference between the measured phase currents and the setpoint-value settings for the phase currents. On the basis of this difference, any method for calculating the rotor angle position can be performed.

Apparatus and method for ascertaining a rotor position, and electric drive system

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.

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Stuttgart, Germany

Lei Chen