专利汇可以提供Control means with redundant oscillators and a special starting scheme for periodically firing electric valves专利检索,专利查询,专利分析的服务。并且In an electric power delivery system, a plurality of controllable electric valves which are arranged in a bridge configuration are respectively fired in a predetermined sequence by a family of individual firing signals. At least three redundant frequency modulated oscillators and a distributor are used for cyclically generating the firing signals in timed relation to the alternating voltage of the power system. Each of the oscillators produces a train of discrete pulses at a frequency which normally is a predetermined harmonic of the system frequency, and the distributor includes voting logic means which enables a firing signal to be produced in the event of a coincidence of discrete pulses from any two of the oscillators. Concurrently with the commencement of each firing signal, all of the oscillators are simultaneously recycled. A special scheme is provided for starting the firing signal generator in step with system voltage so that the initial firing signal is associated with a predetermined one of the valves and is characterized by a known firing angle of desired value.,下面是Control means with redundant oscillators and a special starting scheme for periodically firing electric valves专利的具体信息内容。
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