POWER SUPPLY METHOD AND APPARATUS

摘要

Embodiments of the present invention disclose a power supply method, including: rectifying a second alternating current, and converting the second alternating current into a second high voltage direct current; when the second high voltage direct current is abnormal, inputting a third high voltage direct current to a DC/DC module; when the second high voltage direct current is normal, inputting the second high voltage direct current to the DC/DC module; and converting, by the DC/DC module, the second high voltage direct current or the third high voltage direct current into a low voltage direct current for outputting.

主权项

1. A power module, comprising a rectifier module, a selecting module, and a DC/DC (Direct Current/Direct Current) module, wherein:
the rectifier module is configured to rectify an input second alternating current, and convert the second alternating current into a second high voltage direct current for outputting; the selecting module is connected to channels for inputting two high voltage direct currents to the DC/DC module, wherein the two high voltage direct currents comprise the second high voltage direct current and a third high voltage direct current; the selecting module is configured to: when it is detected that the second high voltage direct current is normal, connect a channel for inputting the second high voltage direct current to the DC/DC module and disconnect a channel for inputting the third high voltage direct current to the DC/DC module; when it is detected that the second high voltage direct current is abnormal, connect the channel for inputting the third high voltage direct current to the DC/DC module and disconnect the channel for inputting the second high voltage direct current to the DC/DC module; and the DC/DC module is configured to convert the input second high voltage direct current or the third high voltage direct current into a low voltage direct current, and output the low voltage direct current to a load for use.