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电机变频器安装时有哪些要注意的

电机变频器安装时有哪些要注意的

浏览：36次 | 提问时间： 07-29 05:40

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森爱深爱 07-29 05:41

你好，电机变频器安装时注意：检查进线出线有没有接反。检查制动电阻接线有没有接对检查进线有没有短路检查进线的电压等级对不对检查变频器功率电流与电机是否匹配检查变频器是否有进水或杂物如果是超过一年未上电的变频器，需要进行电容充电。

接吻吧骚年 07-29 05:50

1)变频器应该安装在控制柜内部。2)变频器最好安装在控制柜内的中部；变频器要垂直安装，正上方和正下方要避免安装可能阻挡排风、进风的大元件。3)变频器上、下部边缘距离控制柜顶部、底部、或者隔板、或者必须安装的大元件等的最小间距，应该大于300mm。4)如果特殊用户在使用中需要取掉键盘，则变频器面板的键盘孔，一定要用胶带严格密封或者采用假面板替换，防止粉尘大量进入变频器内部。5)在多粉尘场所，特别是多金属粉尘、絮状物的场所使用变频器时，总体要求控制柜整体密封，专门设计进风口、出风口进行通风；控制柜顶部应该有防护网和防护顶盖出风口；控制柜底部应该有底板和进风口、进线孔，并且安装防尘网。6)多数变频器厂家内部的印制板、金属结构件均未进行防潮湿霉变的特殊处理，如果变频器长期处于恶劣工作环境下，金属结构件容易产生锈蚀。导电铜排在高温运行情况下，会更加剧锈蚀的过程,对于微机控制板和驱动电源板上的细小铜质导线，锈蚀将造成损坏。因此，对于应用于潮湿和和含有腐蚀性气体的场合，必须对所使用变频器的内部设计有基本要求，例如印刷电路板必须采用三防漆喷涂处理，对于结构件必须采用镀镍铬等处理工艺。除此之外，还需要采取其它积极、有效、合理的防潮湿、防腐蚀气体的措施。

久故 07-29 05:58

在工业区的工作现场，变频器和电机安装的距离基本上可以分成三种情况：远距离、中心隔和近距离。在二十米以内的距离为近距离，二十米到一百米之间的距离为中心隔，一百米以上的距离为远距离。因为变频器输出时的电压波形不是正弦，所以波形中含有很多的谐波成分，其中高次谐波会使得变频器输出的电流量变大，构成电机绕组发热，发出振动和噪声，加快了绝缘老化的现象，有的甚至还会损坏电器；还各类频率的谐波会向空间发射不合挨次的无线电烦扰，还可以招致其它设备误行动。因此，但愿把变频器安放在被控电机的临近。然则，由于出产现场空间的限制，变频器和电机之间往往要有必定距离。假设变频器和电机之间的距离为二十米以内的近距离，这时就能够直接和变频器相联接了；如果变频器和电机之间的距离为二十米到一百米的中心隔联接，这就需求调整变频器的载波频率来增添谐触及烦扰；而对变频器和电机之间的距离为一百米以上远距离联接的时候，这不单要适度的降低载波频率，还要加装输出交流电抗器。

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