Electronic Power Conditioners
L3Harris' electronic power conditioners (EPCs) transform the regulated or unregulated satellite bus voltage into the high voltages required for a specific traveling wave tube (TWT) and provide power to the associated linearized channel amplifier (LCAMP) as required. L3Harris’ heritage for commercial space traveling wave tube amplifiers (TWTAs) began in 1973. Since then we have designed, produced and delivered numerous different EPC models covering TWTA output power levels ranging from 2 watts to over 300 watts, and frequency Bands ranging from L-Band to V-Band.
All L3Harris EPC models incorporate the same basic circuit topology and mechanical configuration. They differ only to accommodate unique program requirements such as magnitude of power processing, bus interface, commands, telemetry and auxiliary supplies. The basic design is a modular concept allowing interchange of the basic elements (low- and high-voltage) with minimal impact. This approach is proven out by our excellent EPC reliability, discussed below.
Modern L3Harris EPCs (the 2000Hx, 2300Hx and 2400Hx/2410Hx series) have accumulated over 100 million operating hours in orbit with a FIT rate of less than 100 (spot FITs). Our reliable track record validates our conservative design philosophy, particularly with regard to high-voltage design criteria.
|Model||Single / Dual||Reg / Unreg||Bus Voltage||Max DC Power Handling||Approx. Efficiency||Mass Range||Shipped||In Orbit|
|2000Hx||Single||Regulated||36–100 V||300 W||94%||1080 to 1360 g||2,682||2,214|
|2300Hx||Single||Unregulated||21–46 V||300 W||94%||1080 to 1360 g||161||40|
|2400Hx||Dual||Regulated||36–100 V||550 W||94%||1720 to 1850 g||1,320||1,132|
Modern L3Harris EPCs In Orbit: > 3300 (> 140 million hours, Spot FIT Rate: < 150)