What is the primary purpose of using a flywheel in a rotary uninterruptable power supply?

The primary purpose of using a flywheel in a rotary uninterruptable power supply (UPS) is to provide temporary kinetic energy until the generator warms up. In scenarios where there is a sudden loss of power, the flywheel can maintain the momentum and supply power momentarily until the backup generator reaches a stable operating speed and can take over the load. This is crucial in ensuring an uninterrupted power supply to connected devices, especially those sensitive to power fluctuations or interruptions.

Using a flywheel allows the system to respond quickly and efficiently during power outages, making it an integral component of rotary UPS systems. Its ability to store kinetic energy helps mitigate the effects of power loss until a more stable power source is available, demonstrating a critical function in maintaining operational continuity in environments where power is vital.