H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 7/49 (2007.01) H02M 1/08 (2006.01)
Patent
CA 2694507
A method is specified for operation of a converter circuit, wherein the converter circuit has a first and a second partial converter system (1), the partial converter systems (2) are connected in series to one another via two series-connected inductances (L1, L2), the junction point of the two series-connected inductances (L1, L2) forms an output connection (A), each partial converter system (1, 2) comprises at least one two-pole switching cell (3), and each switching cell (3) has two series-connected controllable bidirectional power semiconductor switches with a controlled unidirectional current flow direction, and a capacitive energy store which is connected in parallel with the series circuit formed by the power semiconductor switches in which method the power semiconductor switches in the switching cells (3) of the first partial converter system (1) are controlled by means of a control signal (S1), and the power semiconductor switches in the switching cells (3) in the second partial converter system (2) are controlled by means of a further control signal (S2) . In order to allow the capacitive energy store in the converter circuit to be designed such that it is independent of the desired current at the output connection of the converter circuit, that is to say it is independent of the frequency thereof, the control signal (Si) is formed from a voltage oscillation signal (VL) across the inductances (Ll, L2) and a switching function (.varies.l) for the power semiconductor switches in the switching cells (3) of the first partial converter system (1), the further control signal (S2) is formed from the voltage oscillation signal (VL) across the inductances (L1, L2) and a switching function (.varies.z) for the power semiconductor switches in the switching cells (3) of the second partial converter system (2), and the switching functions (.varies.1, .varies.2) are formed by means of a voltage oscillation signal (VA) with respect to the voltage (Vu) at the output connection (A), and a selectable reference signal (Vref).
Winkelnkemper Manfred
Abb Schweiz Ag
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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