Uninterruptible Power Supply (UPS)

A device that enables the supply of stable output power without being affected at all by input power outages or voltage drops. Also known as a UPS (Uninterruptible Power Supply).

The most common method combines a storage battery with an AC-DC converter and a DC-AC converter. In this method, during normal operation, the input AC voltage is converted to DC voltage, a portion of which is used for float charging the battery, and then converted back to AC voltage to supply power to the load. In the event of a power outage or voltage drop, the system switches to power supply from the battery to maintain output stability. An alternative method without using a storage battery involves storing electric energy as kinetic energy by combining a flywheel, motor, and generator to prepare for outages or voltage drops. Note that the blackout protection time of an uninterruptible power supply is limited to short durations such as momentary outages or power switching, and is not suitable for long-term blackouts like those covered by storage batteries for solar power systems.