Optimierung von Pulsmustern mit Bernoulli-Polynomen

Details

Veröffentlichungs-Nr.

EP3876411

Aktenzeichen

EP20160674

Anmeldetag

3. März 2020

Veröffentlichung

3. Mai 2023

Erteilung

3. Mai 2023

Rechtsraum

EP

IPC

H02M7/483H02M1/12H02M7/5387

Abstract

A method for controlling an electrical converter (10), the electrical converter (10) converting an input voltage (v_in) into a multi-level output voltage (v_out), comprises: determining an optimized pule pattern (u(x)); determining switching states (18) from the optimized pulse pattern (u(x)) and applying the switching states (18) to semiconductor switches (14) of the electrical converter (10), such that the multi-level output voltage (v_out) is generated; wherein the optimized pulse pattern (u(x)) comprises a plurality of switching transitions (Δu), each switching transition (Δu_i) encoding a transition between two different levels of the multi-level output voltage (v_out), at a switching angle (x_i); wherein the optimized pulse pattern (u(x)) is determined by optimizing a cost function; wherein the cost function J(x) = Δu^TA(x)Δu is a cost matrix A(x), which is multiplied from both sides with a vector Δu composed of the plurality of switching transitions (Δu_i); and wherein each entry of the cost matrix A(x) depends on polynomials into which the switching angles are input (x_i).

Anmelder

Firma

ABB Schweiz AG

Land

🇨🇭 Schweiz

Fachgebiete