Method of limiting a current supplied by a DC power supply

摘要

The invention relates to a method of limiting a current idc supplied by a DC power supply, the method comprising:
interposing a switching stage between the power supply and a load, the switching stage including a controllable switch in series with a freewheel diode; andperiodically controlling the switch so that for each period of duration T, the following averaged quantity;1T⁢∫ot⁢i_·ⅆt
is calculated in which i is a current that is an image of the power supply current idc, the averaged quantity being reset to zero at the beginning of each period, with the switch being caused to be closed so long as said averaged quantity remains below a predetermined current threshold ithresh, and with the switch being caused to be open, otherwise.

主权项

1. A method of limiting a current idc supplied by a DC power supply, the method comprising:
interposing a switching stage between the power supply and a load, the switching stage including a controllable switch in series with a freewheel diode; and periodically controlling the switch so that for each period of duration T, the following averaged quantity1T⁢∫ot⁢i_·ⅆtis calculated in which i is a current that is an image of the power supply current ids, the averaged quantity being reset to zero at the beginning of each period, with the switch being caused to be closed so long as said averaged quantity remains below a predetermined current threshold ithresh, and with the switch being caused to be open, otherwise,
said method being implemented by a power converter including a plurality of arms, each of which arm comprises two switching cells in series, each cell comprising a controlled switch connected in parallel with a diode, wherein, for the duration of the period T, a switch in one of the cells of one of the arms is kept closed while a switch of another one of the cells in another one of the arms is controlled in application of the periodic control step.