6ES7416-2XN05-0AB0 亿佳询

6ES7416-2XN05-0AB0 亿佳询

变频器能用来驱动单相电机吗？可以使用单相电源吗？

基本上不能用。对于调速器开关起动式的单相电机，在工作点以下的调速范围时将烧毁

辅助绕组；对于电容起动或电容运转方式的，将诱发电容器爆炸。变频器的电源通常为3相，但对于小容量的，也有用单相电源运转的机种。

27、变频器本身消耗的功率有多少？

它与变频器的机种、运行状态、使用频率等有关，但要回答很困难。不过在60Hz以下的变频器效率大约为94%~96%，据此可推算损耗，但内藏再生制动式（FR-K）变频器，如果把制动时的损耗也考虑进去，功率消耗将变大，对于操作盘设计等注意。

28、为什么不能在6~60Hz全区域连续运转使用？

一般电机利用装在轴上的外扇或转子端环上的叶片进行冷却，若速度降低则冷却效果下降，因而不能承受与高速运转相同的发热，降低在低速下的负载转矩，或采用容量大的变频器与电机组合，或采用电机。

29、使用带制动器的电机时应注意什么？

制动器励磁回路电源应取自变频器的输入侧。如果变频器正在输出功率时制动器动作，将造成过电流切断。所以要在变频器停止输出后再使制动器动作。

30、想用变频器传动带有改善功率因数用电容器的电机，电机却不动，清说明原因

变频器的电流流入改善功率因数用的电容器，由于其充电电流造成变频器过电流(OCT),所以不能起动，作为对策，请将电容器拆除后运转，甚至改善功率因数，在变频器的输入侧接入AC电抗器是有效的。

31、变频器的寿命有多久？

变频器虽为静止装置，但也有像滤波电容器、冷却风扇那样的消耗器件，如果对它们进行定期的维护，可望有10年以上的寿命。

32、变频器内藏有冷却风扇，风的方向如何？风扇若是坏了会怎样？

对于小容量也有无冷却风扇的机种。有风扇的机种，风的方向是从下向上，所以装设变频器的地方，上、下部不要放置妨碍吸、排气的机械器材。还有，变频器上方不要放置怕热的零件等。风扇发生故障时，由电扇停止检测或冷却风扇上的过热检测进行保护 33、滤波电容器为消耗品，那么怎样判断它的寿命？

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