Abstract: A method of pulse width modulation (PWM) generation for a converter of an electric or hybrid vehicle electric machine. The converter is operated with phase shifts with a duty cycle associated with a phase shift, and the converter provides voltage to a transformer of the electric machine. The method of pulse width modulation generation includes operating the converter with requests of duty cycle change, with a subdivision period being defined between two requests of duty cycle change. Half of the duty cycle is applied at the start of said subdivision period and half of the duty cycle is applied at the end of said subdivision period.

Abstract: A method of AC acquisition for an electric machine, includes: a step in which an inverter is operated according to a six-step operation, during which a fundamental period of 2? is divided into six equal time periods, maximum one switching action occurring during each; a step in which a plurality of values of an AC of the inverter from a first reference frame are sampled for each equal time period; a step in which the sampled values are rotated from the first reference frame to a second reference frame; a step in which for each equal time period, the values from the second reference frame are averaged; and a step in which a current value is estimated according to the averaged sampled values.

Abstract: A method determines a correction value for a control device for an electric machine, which describes an angular difference between a position of a d-axis of the electric machine and an actual position of the d-axis. The correction value is determined in a rotating state of a rotor of the electric machine as a function of a d voltage value describing a d component of a stator voltage specified by the control device in the initial configuration, of a q voltage value describing a q component of the stator voltage specified by the control device in the initial configuration, of a flux value describing a magnetic flux of the rotor, a speed value describing the speed of the rotor in the rotating state, and of a calibration value describing a speed-dependent voltage error of the d component of the stator voltage.

Abstract: Method for operating a power converter for a permanently excited electric machine, wherein temperature information, which describes a temperature of at least one permanent magnet of the electric machine, is determined by means of an observer as a function of operating parameters of the electric machine, and the power converter is controlled as a function of the temperature information, wherein a computing device, which handles processes in time slices, carries out a first process in a first time slice for detecting parameter values for determining the operating parameters and carries out a second process, which determines the temperature information, in a second time slice, which is retrieved less frequently than the first time slice.

Abstract: A method determines a correction value for a control device for an electric machine, which describes an angular difference between a position of a d-axis of the electric machine and an actual position of the d-axis. The correction value is determined in a rotating state of a rotor of the electric machine as a function of a d voltage value describing a d component of a stator voltage specified by the control device in the initial configuration, of a q voltage value describing a q component of the stator voltage specified by the control device in the initial configuration, of a flux value describing a magnetic flux of the rotor, a speed value describing the speed of the rotor in the rotating state, and of a calibration value describing a speed-dependent voltage error of the d component of the stator voltage.

Abstract: Method for operating a power converter for a permanently excited electric machine, wherein temperature information, which describes a temperature of at least one permanent magnet of the electric machine, is determined by means of an observer as a function of operating parameters of the electric machine, and the power converter is controlled as a function of the temperature information, wherein a computing device, which handles processes in time slices, carries out a first process in a first time slice for detecting parameter values for determining the operating parameters and carries out a second process, which determines the temperature information, in a second time slice, which is retrieved less frequently than the first time slice.