Robert Boschgmbh

Mark Damson

Daniel Raichle

Gunther Goetting

Thomas Wiecha

Patrick Mattes

Matthias Schueler

Michael Kessler

Tino Merkel

Jochen Kuehner

Vincent Dautel

Christian Mader

Kay Hindorf

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

A method is described for the pulse-width-modulated control of switching elements of a pulse-controlled inverter, the impulses of successive signal periods of the control signal, in a first control mode, respectively having a uniform start or end time within the signal period, or being situated uniformly centered in the middle of the signal period, and the impulses of successive signal periods of the control signal, in a second control mode, being situated alternately at the beginning of the signal period and at the end of the signal period.

Method and control unit for the pulse-width-modulated control of switching elements of a pulse-controlled inverter

The invention relates to a method for actuating an inverter () by means of space vector pulse width modulation, in particular for actuating an electrical machine (), wherein the inverter () has a plurality of controllable switches (S) and is configured to provide a multi-phase electrical voltage (U, V, W) in the form of a voltage space vector (V*), wherein the controllable switches (S) are actuated in such a manner that different duty cycles of the switches (S) are set and a plurality of successive different switching states (V-V) of the switches (S) are set up to provide the voltage space vector (V*), wherein the duty cycles of the switches (S) are extended during a pulse width modulation period (T) if a duty cycle of one of the switches (S) falls below a predefined threshold () during the pulse width modulation period (T).

Method and device for actuating an inverter

The invention relates to a method for calibrating a multiphase, in particular three-phase, inverter () having a respective switching element (T, T, T) on the high-voltage side and a respective switching element (T, T, T) on the low-voltage side for each of the phases thereof as well as a respective current sensor for at least some of the phases (I, II, III). The following steps are proposed: (f) switching off all switching elements (T-T), (g) switching on a switching element (T) on the high-voltage side for a first phase (I) and a switching element (T) on the low-voltage side for a second phase (II), (h) measuring the currents flowing through the first phase (I) and the second phase (II), (i) forming an average value from the measured currents, and (j) calibrating the inverter () on the basis of the formed average value. The invention also relates to an apparatus, a computer program and a computer program product.

Method for calibrating a multiphase inverter, operating apparatus, computer program, and computer program product

In a method for optimizing a space vector pulse width modulation, a voltage is connected to a load, by combining discrete switching states of a plurality of switches to control the load, the load being switched to zero potential by two of the switching states. In the case the maximum degree of control is increased, during a pulse width modulation period, at least one of the switching states, that switches to zero potential, is omitted.

Method and device for optimizing a space vector pulse width modulation

A method for metering fuel into a combustion chamber of an internal combustion engine is provided, in which a fuel quantity to be metered for a combustion is metered by a preinjection and at least one additional injection, and in which, in the operation of the internal combustion engine, quantity errors of the preinjection are ascertained from the signal of at least structure-borne noise sensor. The method is distinguished in that a correction value is formed as a function of the quantity error of the preinjection, and at least one of the additional injections is corrected using the correction value. A control device is also provided that controls the method.

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Stuttgart, Germany

Mark Damson