MAC压力电磁阀130B-611JA MAC电磁阀主阀芯上腔压力增大,并在弹簧力的作用下向下运动,关闭主阀,介质断流,电磁阀关闭。常开型与此相反;体积小,功率低,但介质压差范围受限,管道中压力必须满足开启的压差条件;MAC电磁阀工作时,电磁铁通电产生电磁力,衔铁被电磁铁吸引,通过顶杆推动阀杆组合向右移动,阀杆组合与左阀座分离,进气口与输出口连通,同时阀杆组合右锥面与右阀座紧密结合,关闭排气口,保证输入高压气体由进气口流向电磁阀输出口供工作使用。由导阀和主阀芯连着形成通道,常闭型电磁阀电磁通电时,MAC电磁阀产生的电磁力使导阀打开,介质流向出口,主阀上腔压力迅速下降,在主阀上下腔内形成压差克服弹簧力而随之向上运动,主阀开启,介质流通,电磁阀开启;线圈断电时,电磁力消失,动铁芯在弹簧力的作用下复位,关闭导阀,介质从平衡孔中流入。 当MAC电磁阀应用在气动系统中,与气动元件连接时一般采用生料带(即密封带)缠绕。为确保质量应选正规厂家的产品。工作制式:分长期工作制,反复短时工作制和短时工作制三种。本公司常规产品均为长期工作制,即线圈允许长期通电工作。对于长时间阀门开通只有短时关闭的情况,则宜选用常开电磁阀。MAC电磁阀用在短时工作制而批量又很大时,可作特殊订货以降低功耗。工作频率:动作频率要求高时,结构应优选直动式电磁阀,电源听优选交流。动作可靠性:严格地来说此项试验尚未正式列入我国电磁阀专业标准,为确保质量应选正规厂家的产品。有些场合动作次数并不多,MAC电磁阀但对可靠性要求却很高,如消防、紧急保护等,切不可掉以轻心。
MAC电磁阀电磁控制阀开启后,因工作气隙较小,磁路磁阻很低,电磁线圈通入较小的保持电流便能产生足够大的电磁作用力以保证电磁控制阀的可靠开启。小的保持电流可以降低能量消耗,减小线圈发热,同时有利于电磁控制阀的快速闭合。综上所述,电磁阀驱动电路的设计要求在电磁阀的不同工作阶段应维持相应的理想驱动电流。MAC电磁阀电路采用电流检测反馈控制的PWM输出。与低端设置采样电阻的电流检测方法相比,不仅能控制电磁阀保持电流,解决了电流检测时电磁阀续流环难以包含在内的问题,而且提供了部分的短路保护。MAC电磁阀通过在发动机电控系统中应用这种新型驱动电路,已初步实现了转子机的稳定运转。
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