| 摘要 |
<p>A generator system adapted to be connected to an external ac power source for supplying electrical ac power to a load for prolonged periods when the external electrical ac power source fails. The system comprises a main ac generator unit capable of generating an ac potential at a selected frequency and voltage for the load, and an auxiliary ac generator is connected to the main generator for generating ac at a high frequency. This high frequency ac is conveyed to a relatively small high speed motor and flywheel unit in a sealed chamber, which unit at full speed can store large amounts of rotational kinetic energy. The high speed motor has astator armature with a power winding and an excitation coil, and a cooperating rotor of soft magnetic material having a cylindrical surface with a layer of magnetizanic permanent magnet material thereon. When energized with the high frequency ac, the power winding causes the rotor to rotate as a hysteresis motor. When the external electrical ac power source fails, the excitation coil is energized with high frequency ac to magnetize the layer of permanent magnet material into a pattern of north and south magnetic poles which will enable the rotational kinetic energy of the rotor and flywheel to generate high frequency ac of constant frequency in the power winding which is supplied to the auxiliary generator to cause it to function as a synchronous motor to drive the main ac generator so that it will keep on producing the ac potential to the load.</p> |
