1、用中间继电器作为缺相保护装置的线路
2、脚踏开关踩气缸动作实物彩图接线
3、浮球开关的工作原理讲解
4、常用元件代号及图形符号的画法
5、电工必学的7个基础程序-自锁-多点启停-点动加联动运行
6、电工必学的7个基础程序-延时接通、延时断开-交替输出
7、电工必学的7个基础程序-连锁和互锁-闪烁电路
8、220V电机的倒顺开关实物彩图接线方法
9、变频器电路的接线方法
10、时间继电器的接线方法-实物彩图
11、以太网跟PLC通信电路实物图
12、正反转电路实物彩图接线方法
13、互感器与电表的实物彩图接线方法
14、自制温控风扇电路实物彩图方法
15、星三角380V主电路实物彩图接线方法
16、电接点压力表实物彩图接线电路图
17、接触器实现单开双控的实物彩图接线方法
18、空气能热水循环系统电路
19、变频器接线实物彩图电路展示
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安肩柴3725变频器与星三角启动怎样连接? -
元琦邵13143038013 ______ 将原电机线从工频电源断开,直接接至变频器输出,用切换至三角形的接触器辅助触点作为变频器的启动信号,可以完成纯变频器控制的改造. 如果需要工/变频切换,原工频电源与变频器输出需加互锁的切换接触器或手动空开.
安肩柴3725怎么区分一个电机是轻载还是重载启动? -
元琦邵13143038013 ______ 区分电机的启动是否为重载要通过“电机静转矩”,即当电机静止时,要使电机启动并转动所需的力矩.用公式GD²=n KG*M²来表达,n越大,所需转动力矩越大,依照力矩的大小就可以判断是否属于重载.力矩越大,起动转矩越大,电动机...
安肩柴3725变频器和星三角同时控制一台水泵 -
元琦邵13143038013 ______ 星三角启动的目的是为了减小启动电流.变频器启动是软启动已经把启动控制到较小了.星三角启动线路到电机端子上的是六根线.而变频器只需要三根.两者是不好同时并联或串联用的.在说有变频器还要星三角电路做什么,如果是想用接触器控制变频器那就用主接触器控制变频器的电源,把星和角接触器拆掉不用就好了.
安肩柴3725画出电机星三角启动的主电路和控制电路. -
元琦邵13143038013 ______ 这两个图都是,左面是主回路,右面是控制回路.
安肩柴3725电机的星三角降压启动实物接线图怎么画 -
元琦邵13143038013 ______ (1)电机的星三角降压启动实物接线图如下图所示: (2)采用星三角降压启动时,启动电流为直接采用三角形接法时启动电流的1/3,但启动转矩降低很多,所以只能用于轻载或者空载启动的电动机上. (3)采用星三角降压启动的优点是所需设...
安肩柴3725在不改变星三角的情况下用变频器控制电机运转如何接线 -
元琦邵13143038013 ______ Y-启动本来就是利用Y接法时启动电流小,转矩大的特点来进行的.在Y-启动过程中,有几个接触器,先是接通了Y接法,然后根据延时时间,使用延时继电器将接...
安肩柴3725请电工高手帮我设计一个55KW三相异步电机星三角启动控制电路,主要是防止弧光短路和电源电压的叠加问题. -
元琦邵13143038013 ______ 防止弧光短路和电源电压的叠加问题变频器最好.
安肩柴3725星三角启动电路电机接线盒6个端子怎么接线 -
元琦邵13143038013 ______ Y星时绕组的尾端U、V W需要短接在一起,而三角时 V要接X 引出A线,W接Y引出B线 U接Z.引出C线.
安肩柴3725星三角 自耦减压 软启动 变频启动 它们的区别是什么 越详细越好. 最好我张变频和软启动的电路图 谢谢
元琦邵13143038013 ______ 这要从经济性和启动效果两方面分析:星三角 自耦减压 软启动是电动机启动专用的方案,而变频器不是为启动专用的.星三角启动优点是最简单经济,但要求电机在正常运转时必须是角形接法,且星接点必须引出到接线盒内,而且必须空载启动.缺点是星角切换时转矩和电流冲击较大;自耦减压启动需要自耦变压器,成本略高.启动电流可在一定范围内调节,启动效果比星角好;软启动的启动时间和电流都可调,且软启动器有多种保护,故效果最佳.变频器的启动效果当然最好,但由于主要是为电机调速用的,所以如果专用于电机启动实在是浪费了设备资源.
安肩柴3725电机星三角接线 -
元琦邵13143038013 ______ 电机接线盒里有六个接线头:1.上面三个接线头横的方向用连接片短接,下面三个接线头接三相电源(星形接法).(U1 V1 W1 短接,W2 U2 V2接三相电源,正好是星形接法)2.拆下上面横的方向连接片,改为竖的方向上下连接,下面三个接线头接三相电源(三角形接法).).(U1和W2 短接, V1和U2 短接, W1和V2 短接 .再分别接三相电源,正好是三角形接法) 所以电机接线盒里六个接线头按U1 V1 W1 ,W2 U2 V2排列,改变 星/角 接法,相当方便.不能U1 V1 W1 , U2 V2 W2排列,是因为改变 星/角 接法,相当不方便.
