H - Electricity – 02 – M
Patent
H - Electricity
02
M
H02M 3/335 (2006.01) H02M 3/337 (2006.01)
Patent
CA 2053737
The invention relates to a method and a circuit arrangement for controlling power valves included in at least one converter forming part of a converter circuit which on its input receives at least two DC input voltages and transmits current pulses respectively corresponding to these DC voltages to a common load via a common output filter, the controlling aiming at keeping the DC voltages equal. The method includes the steps of: determining a stop time for the current pulses as a function of a difference between the input voltages, such that the stop time of current pulses originating from a lower of the at least two input voltages is postponed in relation to the difference; and determining a starting time of the current pulses as a function of the difference between the input voltages, such that the starting time for a current pulse originating from a lower of the at least two input voltages is postponed in relation to the difference. The method and control circuit regulate the input voltages by shifting the respective current pulses with respect to each other, essentially without changing widths of the current pulses.
Backman Nils Thomas
Karlsson Bror Mats
Emerson Energy Systems Ab
Marks & Clerk
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