How to use three phase motor in single phase power supply
This time,I would like to share some important knowledge that I used it when faced emergency or critical situation.What are you doing if have only three phase motor and single phase power supply available? How to use three phase motor in single phase power supply?Actually three phase motor can operate in single phase power supply with the help of a permanent CAPACITOR.This small thing (capacitor) very helpful to make three phase motor running in single phase power supply. As per our last discussion about three phase motor,normally its have two(2) common winding connection ,STAR or DELTA connection.In this post,I explained how to wiring the capacitor in three phase motor,how to change motor rotation,how to estimate value of capacitance and selection of suitable capacitor. How to install and wiring capacitor for three phase motor with single phase power supply? 1) Wiring of capacitor for FORWARD rotation -For FORWARD rotation,we must install capacitor in DELTA connection as per drawing below. * symbol > The change of the connection terminal * of the capacitor allows to invert the turning sense of the motor. 
2) Wiring of capacitor for REVERSED rotation For REVERSED rotation,we must install capacitor in any two phase of winding in STAR (Y) connection as per drawing below. * symbol > The change of the connection terminal * of the capacitor allows to invert the turning sense of the motor. 
Output of Motor We must to consider the output of motor when we converted from three phase to single phase power supply to match and suitable with our application.But we cannot get the actual value due to so many aspects we must calculate and its so complicated.So we can estimate the approximate value of motor output as per percentage (%) below :-  How to choose suitable capacitor?
This is very important decision making that we must consider about size of capacitor when plan to running the three phase motor in single phase power supply.If not choose properly,it might be effected to motor condition and performance also can damaged the winding of motor. Below is approximate value of the capacitor that required.We must consider the Working voltage VS Network voltage to avoid any damage on the three phase motor winding or capacitor its self.Please refer table below : 
เครดิต: //www.electricneutron.com/electric-motor/use-three-phase-motor-single-phase-power-supply/
| Create Date : 30 กันยายน 2559 |
| Last Update : 30 กันยายน 2559 10:26:40 น. |
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