Robert Boschgmbh

Andrea Deflorio

Michele Hirsch

Tino Merkel

Ulrich Schuster

Hans-Juergen Herderich

Steffen Waldenmeier

Patrick Calandrini

Olivier Kukawka

The invention relates to a method () for controlling an inverter () using space-vector pulse width modulation, in particular to control an electric machine (), said inverter () being equipped with a plurality of controllable switches (S) and being designed to provide a polyphase electric current (IU, IV, IW), in particular to supply multiphase electric current to an electric machine (). In said method, a reference phase angle (alpha_R) is predefined, and the inverter () is controlled in such a way that a plurality of different successive switching states (V-V) is established for the switches (S) in order to provide the electric current (IU, IV, IW) in the form of a current space vector (I*). The inverter () is controlled in such a way that the current space vector (I*) is provided at a phase angle (alpha_I) which differs from the reference phase angle (alpha_R), a difference (delta_I) of the phase angle (alpha_I) from the reference phase angle (alpha_R) being determined according to a power loss (PA, PB, PC) and/or a temperature (TA, TB, TC) of at least one of the switches (S).

Method and device for controlling an inverter

The invention relates to a method () for controlling an inverter () using space-vector pulse width modulation, in particular to control an electric machine (), said inverter () being equipped with a plurality of controllable switches (S) and a corresponding plurality of freewheeling diodes (D) and being designed to provide a polyphase electric current (IU, IV, IW) and a polyphase voltage in the form of current space vectors (I*, U*), in particular to supply polyphase electric current (IU, IV, IW) to the electric machine (). In said method, the inverter () is controlled to establish a plurality of different successive switching states (V-V) for the switches (S), and the inverter () is switched to an off-load switching state (V, V) by means of two switching states (V, V), a switch-on time (t-t) of the switching states (V-V) being varied according to a desired load value (m) for the switches (S) and/or for the freewheeling diodes (D), the desired load value (m) being set according to a temperature (Ts, TD) of at least one of the switches (S) and/or one of the freewheeling diodes (D).

The invention relates to a method for controlling an inverter () using space-vector pulse width modulation, in particular to control an electric machine (), the inverter () being equipped with a plurality of controllable switches (S) and being designed to provide a polyphase electric current (IU, IV, IW), in particular to supply polyphase electric current (IU, IV, IW) to the electric machine (). In said method, a desired current space vector (I*) having a desired phase angle (alpha) and a desired amplitude (I) is predefined, and the inverter () is controlled in such a way that a plurality of different successive switching states (V-V) is established for the switches (S) in order to provide the electric current (IU, IV, IW) in the form of a current space vector (I*), the inverter () being controlled in such a way that the current space vector (I*) is provided at a phase angle (alpha) which differs from the desired phase angle (alpha) in order to load the switches (S) according to a desired load value (m) for the switches (S).

The invention relates to a method for controlling an inverter () using space-vector pulse width modulation, in particular to control an electric machine, the inverter being equipped with a plurality of controllable switches (S) and being designed to provide a polyphase electric current (IU, IV, IV), in particular to supply polyphase electric current (IU, IV, IV) to the electric machine (). In said method, a desired current space vector (I*) having a desired phase angle (alpha) and a desired amplitude (I) is predefined, and the inverter () is controlled in such a way that a plurality of different successive switching states (V-V) is established for the switches (S) in order to provide the electric current (IU, IV, IV) in the form of a current space vector (I*), the inverter () being controlled in such a way that the current space vector (I*) is provided at a phase angle (alpha) which differs from the desired phase angle (alpha), the difference (delta_beta) of the phase angle (alpha) from the desired phase angle (alpha) being limited according to a rotational speed (f) of the desired current space-vector (I*).

A magnetic transducer configuration may include a permanent magnet element magnetized in its longitudinal direction having a pole transition. The permanent magnet element has a cross section in the pole transition section, which is larger than the cross section of the permanent magnet element in an area outside of the pole transition section. A magnetic position sensor may include a magnetic field sensor array and magnetic transducer configuration. The magnetic field sensor array and the magnetic transducer configuration are situated displaceably in the longitudinal direction in a plane-parallel manner. The magnetic field sensor array has at least one magnetic field sensor lying in a path along which the permanent magnet element moves during displacement of the magnetic transducer configuration.

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Marbach am Neckar, Germany

Andrea Deflorio