把三相380V电机改成单相220V电机
在日常生活中怎样将三相380V电机改成单相220V电机来使用。方法其实也很简单,只需要在电路中添加一个450V的CBB电容就可以了。
此时只要将电机的接法按下图的角形接法,在V1,W1上并联一个CBB电容,然后分别从U1上引出L线,从V1上引出N零,这样就可以正常的使电机正转了。
此时只要将电机的接法按下图的角形接法,在V1,W1上并联一个CBB电容,然后分别从U1上引出L线,从VW1上引出N零,这样就可以正常的使电机反转了。
这样改过以后电机的功率只是铭牌功率的70%,如果负载过重,电机会出现发热,无力等拉不动的现象。电容的大小算法为每千瓦电容为30–40uF。如电机功率为3000瓦,则电容为100—120uF耐压450V的CBB电容即可。
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