Speed control device

专利名称：Speed control device

发明人：Shigeru Jinnai,Nobuo Fukushima申请号：US07/320987申请日：190309公开号：US04965682A公开日：19901023

摘要：A speed control device for controlling the speed of an electric motor forrotating a recording medium by a feedback control system including a proportion termproportional to information on a deviation of the speed of the motor from a speed setvalue and an integration term obtained by integrating the information of the deviationwith respect to time. The value of the difference between a stationary term obtainedwhen the head is loaded on the recording medium and a stationary term obtained whenthe head is unloaded is previously memorized about each of head load positions.Depending on the head load position, the memorized corresponding stationary term issupplied to the feedback control system, whereby the speed of the motor is maintainedconstant despite a change in the load.

申请人：CANON KABUSHIKI KAISHA

代理机构：Robin, Blecker, Daley & Driscoll

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