For use in remote power controllers, linear amplifiers capable of delivering 15 Kw and 25Kw from DC to 50 KHz with efficiency of up to 90% using special modulation technology are the focus of this project. Success in this effort would eliminate the need to use inverters and local power supplies at numerous locations in a distributed multiterminal network. Hydraulic systems could be replaced by small electric motors which operate at high frequency consuming high power AC. Local frequency dividers could be used for various loads as needed. (Large AC to DC power inverters are eliminated completely). Motors with more than 3 poles could be used. In this concept, a low level oscillator would modulate each linear amplifier to produce each phase at any selected frequency up to 50KHz. Miniature high frequency power transformers reduce AC voltages for loads as needed. To evaluate the feasibility of the proposed innovation, two engineering models will be built and tested for the following characteristics: Engineering Model 1-170 Vac C& 85 Amps DC to 50 KHz at 50 V/usec. Engineering Model 2-230 Vac @ I 10 Amps DC to 50 KHz at 50 V/usec. Total stability on reactive loads up to 50 KHz. Transient recovery from overload less than I usec. Total han-nonic distortion under 1% at full power at 20KHz.
