Fdk Corporation

Jinichi Sakamoto

Takashi Kabasawa

Takuya Harada

An uninterruptible power supply unit is configured such that, during charging of a first battery pack, and until, after the first battery pack is charged to a fully charged state, the voltage of the first battery pack is lowered below an upper limit voltage of a load device, discharging of the first battery pack is prohibited, and discharging of the second battery pack is allowed, and such that, during charging of a second battery pack, and until, after the second battery pack is charged to a fully charged state, the voltage of the second battery pack is lowered below the upper limit voltage of the load device, discharging of the second battery pack is prohibited, and discharging of the first battery pack is allowed.

Uninterruptible power supply unit

An uninterruptible power source devicein the present invention includes: an input-output terminalthat is connected in parallel with a power source linethrough which electric power is supplied from an external power sourceto a loading device; a battery unitwhose rated voltage is lower than a voltage Vof the external power source; a DC/DC converterthat converts a voltage Vof the battery unitinto a voltage Vequivalent to a difference between the voltage Vof the external power sourceand the voltage Vof the battery unit; a charging circuitthat charges the battery unitthrough the input-output terminalwith the electric power of the external power source; and a discharging circuitthat performs discharge to the loading devicethrough the input-output terminalat a voltage resulting from adding an output voltage Vof the DC/DC converterto the voltage Vof the battery unit, at the time of electric power interruption of the external power source

Uninterruptible power source device

An uninterruptible power supply unit includes: an input/output terminal connected in parallel with a power supply line which supplies power from an external power supply to a load device; a battery unit whose rated voltage is a voltage equal to a voltage of the external power supply; a DC/DC converter for converting the voltage of the external power supply into an output voltage corresponding to a difference between the rated voltage of the battery unit and the charging voltage of the battery unit; a charging circuit for charging the battery unit with a voltage equal to the voltage of the external power supply added with the output voltage of the DC/DC converter; and a discharging circuit that discharges power to the load device from the battery unit through the input/output terminal in the event that the external power supply is interrupted.

An uninterruptible power supply is having a battery, a power inverter circuit for inverting the electrical power of the battery, and a voltage control circuit. The voltage control circuit controls the power inverter circuit, so that the output voltage of the power inverter circuit is maintained at a standby voltage lower than a rated voltage under the condition of a power failure detection signal being not output from an external power supply and the output voltage of the power inverter circuit equals the rated voltage under the condition of the power failure detection signal being output from the external power supply.

Growing community of inventors

Tokyo, Japan

Jinichi Sakamoto