软启动器采用三相反并联晶闸管作为调压器,用这种电路如三相全控桥式整流电路,使用软启动器启动电动机时,晶闸管的输出电压逐渐增加,电动机逐渐加速,直到晶闸管全导通,电动机工作在额定电压的机械特性上,实现平滑启动,降低启动电流,避免启动过流跳闸。将其接入电源和电动机定子之间。
陕西欣鸿然自动化设备有限公司
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四曰:言者以谕意也。言意相离,凶也。乱国之俗,甚多流言,而不顾其实,务以相毁,务以相誉,毁誉成党,众口熏天,贤不肖不分。以此治国,贤主犹惑之也,又况乎不肖者乎?惑者之患,不自以为惑,故惑惑之中有晓焉,冥冥之中有昭焉。亡国之主,不自以为惑,故与桀、纣、幽、厉皆也。然有亡者国,无二道矣。郑国多相县以书者,子产令无县书,邓析致之。子产令无致书,邓析倚之。令无穷,则邓析应之亦无穷矣。是可不可无辩也。可不可无辩,而以赏罚,其罚愈疾,其乱愈疾。此为国之禁也。故辩而不当理则伪,知而不当理则诈。诈伪之民,先王之所诛也。理也者,是非之宗也。洧水甚大,郑之富人有溺者,人得其死者。富人请赎之,其人求金甚多。以告邓析,邓析曰:“安之。人必莫之卖矣。” 得死者患之,以告邓析,邓析又答之曰:“安之。此必无所更买矣。”夫伤忠臣者有似於此也。夫无功不得民,则以其无功不得民伤之;有功得民,则又以其有功得民伤之。人主之无度者,无以知此,岂不悲哉?比干、苌弘以此死,箕子、商容以此穷,周公、召公以此疑,范蠡、子胥以此流,死生存亡安危,从此生矣。子产治郑,邓析务难之,与民之有狱者约:大狱一衣,小狱襦袴。民之献衣襦袴而学讼者,不可胜数。以非为是,以是为非,是非无度,而可与不可日变。