YFA7V20EL、YFA7V28EL、YFA7V40EL、YFA7V55EL、YFA7V58EL、YFA7V80EL、YFA7V78EL、YFA7V107EL、YFA7V117EL、YFA7V160EL电控比例变量泵可以无级地按程序控制泵的排量。泵排量与电磁铁吸力成正比,即与电磁铁的电流成正比。变量活塞上的控制力由比例电磁铁产生。比例电磁铁由BEUEC比例放大器输出电流控制,需要一个电流为300~630mA(600~1260mA)的24V(12V),直流电源。变量起点约在300mA(600mA)变量终点约在630mA(1260mA)调节从Vgmin至Vgmax。如果泵在零位启动或工作压力< 4MPa,则油口G须接入4MPa的先导压力。
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