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专利名称：Variable frequency controller发明人：Scott, Junius D.,Gotal, John D.申请号：EP84104944.8申请日：19840503公开号：EP0131102B1公开日：19900207
摘要：The invention pertains to a frequency divider and phase control for anelectromagnetic feeder having a coil operable from a single phase alternating currentsource, comprising: a zero crossing network connected to said source and producing afirst pulse each time the source crosses zero;a synchronous presetable counter capableof counting to a limit connected to receive said said first pulse and produce a carry signalwhen said limit is reached;monostable multivibrator means connected to receive saidsignal and generate a second pulse;a triac connected in series with said coil across saidsource and gated by said second pulse; andmeans for preseting said counterto vary thefrequency of the pulses to said triac.
申请人：FMC CORPORATION
代理机构：Bardehle, Heinz, Dipl.-Ing.
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