Verfahren zum Betreiben eines Stromrichters und Stromrichter

Details

Veröffentlichungs-Nr.

EP4716079

Anmeldetag

20. September 2024

Veröffentlichung

25. März 2026

Rechtsraum

EP

Abstract

A method for operating a power converter and a power converter are disclosed. The method includes adjusting a common mode voltage (Vcm) at first and second output nodes (p, n) of a power converter. The power converter includes: a first input node (a) configured to receive a first input voltage (Va), and a second input node (b) configured to receive a second input voltage (Vb); a first intermediate capacitor (21) connected between a first intermediate node (x) and a midpoint (m), and a second intermediate capacitor (22) connected between the midpoint (m) and a second intermediate node (y); a first output capacitor (41) connected between a first output node (p) and the midpoint (m), and a second output capacitor (42) connected between the midpoint (m) and a second output node (q); an input converter (1) coupled to the first input node (a) and configured to provide an intermediate voltage (Vdc) between the first intermediate node (x) and the second intermediate node (y); a first output converter (31) coupled between the first intermediate capacitor (21) and the first output capacitor (41), and a second output converter (32) coupled between the second intermediate capacitor (22) and the second output capacitor (42); and a balancing circuit (5) coupled to the first intermediate capacitor (21) and the second intermediate capacitor (22), wherein the second input node (b) is coupled to the midpoint (m). Adjusting the common mode voltage includes: obtaining a duty cycle (D31, D32) of operation of at least one of the first and second output converters (31, 32); and adjusting a duty cycle (D5) of operation of the balancing circuit (5) dependent on the obtained duty cycle (D31, D32; D3) of the at least one of the first and second output converters (31, 32).

Anmelder

Firma

Infineon Technologies Austria AG

Land

🇦🇹 Österreich