POWER CONVERSION APPARATUS

摘要

The present invention relates to power conversion apparatus (40) configured to receive a high voltage alternating current (AC) signal at an input (42, 44) and to provide in dependence thereon a low voltage direct current (DC) signal from an output stage (58, 60). The power conversion apparatus (40) comprises a main path comprising a high voltage capacitor (46) in series with the input. The power conversion apparatus (40) also comprises a first path operative to carry current carried by the main path in at least one of a positive going part and a negative going part of the high voltage alternating current signal and a second path operative to carry current carried by the main path in a positive going part and a negative going part of the high voltage alternating current signal. The power conversion apparatus further comprises first and second switches (52, 54) which are operative to determine when a respective one of the first and second paths carries current. In the power conversion apparatus, the output stage (58, 60) receives current flowing in the first path and at least one of the first and second switches (52, 54) is operable in dependence on a control signal derived from the low voltage direct current signal.

主权项

1. Power conversion apparatus configured to receive a high voltage alternating current (AC) signal at an input and to provide in dependence thereon a low voltage direct current (DC) signal from an output stage, the power conversion apparatus comprising:
a main path comprising a high voltage capacitor in series with the input; a first path operative to carry current carried by the main path in at least one of a positive going part and a negative going part of the high voltage alternating current signal; a second path operative to carry current carried by the main path in a positive going part and a negative going part of the high voltage alternating current signal; and first and second switches which are operative to determine when a respective one of the first and second paths carries current, in which the output stage receives current flowing in the first path and at least one of the first and second switches is operable in dependence on a control signal derived from the low voltage direct current signal.