A Technique for Synchronizing a Parallel Static-Inverter System
David A. Coward · IEEE Transactions on Industrial Electronics and Control Instrumentation · 1972
A technique for synchronizing oscillators based on the coincidence of output pulses has been developed for synchronizing an ultrareliable parallel static-inverter system. A prototype system in which the output frequency is determined statistically by considering the coincidence of the [(n/2)+1]th pulse from the system's n oscillators was constructed. Particular care was taken to ensure that the system was not dependent on any single component or subsystem and that failure of any oscillator channel would not substantially affect remaining oscillators. Testing of the prototype system, which included a 120 h continuous run, showed that design objectives have been achieved, and it was concluded that this system offers a practicable solution to the problem of synchronizing parallel-path static-inverter systems.