Patent ID: 7542311
Filing Date: 2009-06-02
Classification: H02M

Abstract:
1. A method for operating a converter circuit, with the converter circuit having a converter unit with a multiplicity of controllable power semiconductor switches and having an energy storage circuit formed by two series-connected capacitors, in which the controllable power semiconductor switches are controlled by means of a control signal formed from a hysteresis signal vector (x), and the hysteresis signal vector (x) is formed from a difference-phase connection current vector (Δi fi,i ) by means of a hysteresis regulator, and the difference-phase connection current vector (Δi fi,i ) is formed from the subtraction of a phase connection current vector (i fi,i ) from a reference phase connection current vector (i fi,i,ref ), with the reference phase connection current vector (i fi,i,ref ) being formed from a difference power value (P diff ), a difference wattless-component value (Q diff ) and a phase flux vector (ψ g,αβ ), wherein a current correction value (i wherein the current correction value (i wherein the phase connection voltage mean value (u