SCR Inverter for Deep Submergence Propulsion System 670538

This paper describes the design of the power inverters used in Deep Quest, a deep-submergence research vehicle. The inverter package is designed for operation in sea water at pressures up to 6,000 psi. Variable-pulse-width/variable-frequency operation is achieved on an open loop basis, with the proper pulse-width/frequency program being selected empirically for each type of load. A 3-phase full-wave SCR bridge is used with a single SCR commutation circuit which contains no dissipative elements, is inherently self-resetting, and compensates for load changes.


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