| 摘要 |
A backup power system is connected in parallel to a load, which is powered via a power line connecting that load to a main power source, such as a utility. The backup system includes a generator/condenser unit that is coupled to a flywheel unit to maintain the flywheel of that flywheel unit rotating at a preset speed during normal power system operation and is also connected to a thermal engine to supply power to the load via the generator/condenser unit when there is an interruption of power from the main power source. A shaft-coupling unit couples the generator/condenser unit to the flywheel unit. The shaft-coupling unit includes a sensor plate. When there is a difference in rotational speed between the flywheel and the motor/generator, as would be caused due to a main power unit operating at a level other than a predetermined level, this differential rotational speed is translated by the coupling unit into linear movement of the sensor plate. The position of the sensor plate is monitored, and when the sensor plate moves linearly beyond a preset amount, a circuit generates a signal, which activates the thermal engine.
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