| 摘要 |
<p>Flywheel based UPS apparatus (10) for supplying power to an electrical load upon the failure of line power includes a power turbine mounted on a shaft and having an inlet and an outlet. The turbine is constructed and arranged to be responsive to hot gases applied to the inlet for rotating the shaft and producing heat depleted gases that exhaust through the outlet. The apparatus (10) also includes an electrical generating subsystem including a motor, a generator, and a flywheel all rigidly mounted on the shaft for rotation with the power turbine, a motor controller for causing the motor to rotate the shaft at a substantially constant speed only in response to the presence of line power to the electrical load, and an exciter having an active and an inactive state for causing the generator to produce electricity when the shaft rotates, but only when the exciter is in its active state. The apparatus (10) further includes an enclosure for hermetically enclosing the power turbine, motor generator, and flywheel only when the exciter is in its inactive state. Preferably, a vacuum is maintained in the enclosure for minimizing windage losses. Finally, a control responsive only to the loss of line power to the load is effective to change the state of the exciter from inactive to active whereby, in response to loss of line power to the load, the generator is driven by said flywheel and begins to supply power to the load during wind down of the flywheel.</p> |
