专利名称：PUMP CONTROLLER 发明人：SHIRAKAWA HISATO 申请号：JP30442986
幽静的近义词申请日：19861219
秋天的图画简单又好看公开号：JPS63154890A
80后的游戏
公开日：
打鼾症
千年后人类模样19880628
专利内容由知识产权出版社提供
杨柳荫
摘要：PURPOSE:To prevent freezing of pump, by switching/regulating the width of a waveform a pha control signal for limiting the conduction angle of an A.C. current limiting element and suppressing the temperature maintaining current for a pump motor into rippling wave corresponding to the pump displacement by means of a changeover switch. CONSTITUTION:If the temperature detected through a temperature nsor 41 is lower than about 2 deg.C, a microcomputor 11 carries out full-wave rectification of the voltage of a commercial power source through a full-wave rectifier circuit 26 and limits the conduction angle of a triac 17 which rves as an A.C. current limiting element bad on a pha signal synchronized with said full-wave rectified signal so as to suppress the temperature maintaining current for a pump motor 2 into ripping wave for every half period of the commercial power source. Furthermore, the width of waveform of a pha control signal is switched/regulated corresponding to the pump displacement by means of changeover switches 47, 48. Since the conduction angle of the driving current of the pump motor 2 is controlled under temperature maintaining operation so as to suppress the driving current into ripping wave, noi of the pump motor and a noi caud by surge current are suppresd thereby psufficient quantity of heat for preventing freezing of pump can be maintained.相交直线
异地组网申请人：SANYO ELECTRIC CO LTD 更多信息请下载全文后查看
