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The Universal Electric Machine (UEM) separates the speed of the magnetic field on the rotor from the mechanical speed of the rotor. This fundamental ability has numerous consequences that are very appealing in the power industry. The UEM is capable of generating AC power at a frequency that is independent of the mechanical drive speed on the rotor. Thus the UEM generator is a single product that can efficiently convert power into either 50 Hz or 60 Hz regardless of prime mover speed. The UEM maintains a steady-state frequency through a load transient, however severe, from full load to no load or vice versa. As a motor, the UEM uses this same ability to control speed independently of line frequency. The UEM simulates the torque-rpm characteristics of a large mechanical prime mover as the torque increases with mechanical speed. The UEM is capable of automatic synchronization of the electrical output/input to the power source, in frequency, phase angle and voltage. Finally by using modern power electronics, the configuration of the machine is brushless. These properties are ideally suited for both startup and power generation of large gas turbines. The UEM is under development and testing. A patent has been granted in the United States and international patent applications are being submitted.Copyright © 2002 by ASME |
