Power supply device and method of controlling the same by using an adjustable power factor corrector

摘要

Provided are a power supply device and a method of controlling the same. The power supply device includes: a power factor corrector which corrects a power factor of an initial power; a standby power supply unit which is connected to the power factor corrector, the standby power supply unit including a transformer which converts an input power received from the power factor corrector; a sensor which detects a level of an induced power corresponding to the input power; and a power supply controller which determines whether the level of the induced power exceeds a critical value, activates the power factor corrector to correct the power factor of the initial power if the level of the induced power exceeds the critical value, and supplies a driving power to the system based on the level of the induced power.

主权项

1. A power supply device for supplying driving power to a system, the power supply device comprising:
a power factor corrector which corrects a power factor of an initial power; a standby power supply unit which is connected to the power factor corrector, the standby power supply unit comprising a transformer which converts an input power received from the power factor corrector to a predetermined level of a standby power and comprises first and second coils, and a sensor which is coupled to the second coil of the transformer and detects a level of an induced power corresponding to the input power; and a power supply controller which determines whether the level of the induced power exceeds a critical value when a system-on signal is received, activates the power factor corrector to correct the power factor of the initial power if the level of the induced power exceeds the critical value, and supplies a driving power to the system based on the level of the induced power detected after the power factor corrector is activated, wherein the power supply controller determines whether the level of the induced power detected after the power factor corrector is activated is within a predetermined permissible range, and deactivates the power factor corrector if the level of the induced power is not within the predetermined permissible range, and wherein a maximum value of the predetermined permissible range is greater than the critical value.