Category:power
Question:
a three-phase asynchronous motor, the two control.
which teachers are able to give a sketch?谢谢.
Answer:
I just drew a control loop, the main circuit is very simple, three-phase power supply in turn through the main switch, insurance, contact the main AC contactor, thermal relay main contact, the electric motor.
FU for insurance. SB1, SB2 as a combination of buttons in a way. SB3, SB4 for another combination of buttons in one place. KM for the exchange of contactor coils. KM1 contactor normally open for the exchange of contacts. FR for the thermal relay normally closed contact.
Annex:
Answer:
the following change about this map and see okay.
one will be replaced by single-phase 380-volt power supply. (because the AC contactor line package is 380 volts power supply)
2. will be replaced by three-phase AC contactor bulb line package. (three-phase contact of course, is to control the motor in).
so that you can freely control in both the three-phase motor. (but your motor If too much. necessary to compensate for device operation does not. For the average motor is no problem).
Chinese:一台三相异步电动机，两地控制。哪位老师能给出个草图？谢谢。
类别: 电力
问题:
一台三相异步电动机，两地控制。
哪位老师能给出个草图？谢谢。
回答:
我只画了控制回路，主回路很简单，三相电源依次经过主开关，保险，交流接触器主触头，热继电器主触头，电动机。
FU为保险。SB1,SB2为组合按钮在甲地。SB3,SB4为另一组合按钮在乙地。KM为交流接触器线圈。KM1为交流接触器常开触点。FR为热继电器常闭触点。
附件：
回答:
将下面的这个图改一下,看行不行.
一将电源换成单相380伏电源.(因为交流接触器的线包是380伏的电源)
二.将灯泡换成三相交流接触器的线包.(三相触点当然是控制电机的了).
这样就可以在两地随意控制三相电机了.(不过你的电机要是太大.需要补偿器操作就不行了.对于一般电机是没有问题的).
