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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靳所委4435变频器输出三相380V,负载电机是否可采用星形还是三角形,两者的区别呢?谢谢 -
莘怡彩13022899207 ______ 只能用三角型,如果用星型那变频器输出的电压加到电机绕组上的电压约等于三型时的1.733倍,电机将会输出的力矩达不到,而且降低电机能效

靳所委4435变频器降压启动和星三角降压启动有何区别? -
莘怡彩13022899207 ______ 一、原理不同 1、变频器降压启动:靠内部IGBT的开断来调整输出电源的电压和频率,根据电机的实际需要来提供其所需要的电源电压,进而达到节能、调速的目的. 2、星三角降压启动:负载对电动机启动力矩无严格要求又要限制电动机启动...

靳所委4435380V的异步电机把星形接法改成三角形接法,用220V的变频器带动,输出的功率和转速会有什么不同? -
莘怡彩13022899207 ______ 三相380V的异步电机若原来为星形接法,那其各相绕组承受的就是相电压220V,而电机的I线=I相,电机功率P=3*I相*U相*Cosф*η = √3*I相*U线*Cosф*η = 660*I相*Cosф*η.若用输出为三相220V的变频器控制,必须改为三角形接法,此时电机...

靳所委4435星三角启动器和变频器的问题 -
莘怡彩13022899207 ______ 1、VFD上边设备是指两个副边绕组的变压器,专用于变频器的输入整流. 该变压器称为12脉整流变压器.单独三相绕组的输入6脉整流,相比之下,12脉整流可以有效的降低变频器输入侧的谐波电流. 2、因为没有星三角启动,采用变频器启动和调速 3、E代表接地,类似的还有PE代表保护接地.

靳所委4435三相交流电机变频调速的完整电路图是怎么样的啊???求图片 -
莘怡彩13022899207 ______ 这个电路图是很简单的.变频器输入三相交流电,变频器输出端和电机的输入端相连,如果你的电机是闭环调速的,那么就要把编码器的信号线也连到变频器相应的位置上.

靳所委4435我的电机是十五干瓦的,是用星三角起动,但要加装一个变频器,请问怎样个装法? -
莘怡彩13022899207 ______ 如果装了变频器就可以不用星三角启动器了,直接电机按三角形接法接变频器.

靳所委4435三角 - 双星电机能用变频器带吗?请教高手!! -
莘怡彩13022899207 ______ 不知道你要问的是什么,是不是星三角起动的电机能否用变频器,还是星形接法的电机用变频器的问题?可以回答的是,三相电机都能用变频器,无论是380V的三角形接法电机或220V星形接法的电机,只要选用相应的变频器就行了,至于如果是星三角起动的电机,只要更换一个380伏变频器就行了,用三角形接法,直接起动也无问题,设置一下变频器就能够实现软起动

靳所委4435星三角启动电机上下连片图片 -
莘怡彩13022899207 ______ 这个就是电动机接线盒示意图.星接时,把下面的ZXY用连片连接上,ABC接三相电源.角接时,AZ连接,BX连接,CY连接,ABC接三相电源.这个就是角接的.

靳所委4435为什么要星角启动,是星是一速角是二速吗,三速电机要怎么接呢,可以给我图吗,细解一下,谢谢您. -
莘怡彩13022899207 ______ 角形接法正常运转的电机用星形接法起动,优点是:不用另加元器件,只要改变接法即可;缺点是,起动电压只能下降一个固定比例,若要多分几个台阶就无法实现.但这个缺点在大多数电机起动过程中不重要,星角起动法已能满足要求,所以被广泛采用.

靳所委4435来个电机星三角启动实物图
莘怡彩13022899207 ______ http://image.baidu.com/i?ct=503316480&z=&tn=baiduimagedetail&ipn=d&word=%E6%98%9F%E8%A7%92%E5%90%AF%E5%8A%A8%E7%94%B5%E8%B7%AF%E5%9B%BE&step_word=&ie=utf-8&in=15999&cl=2&lm=-1&st=&pn=101&...