How to use three phase motor in single phase power supply

11/12/2014 by 62 Comments

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 it’s 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. Read More

Filed Under: Electric Motor Tagged With: , , , , , ,

Single phase compressor for air-condition

17/03/2011 by 24 Comments

In air-condition system,compressor is a main component to pump the refrigerant circulation in system.It like our heart to pump a blood all around human system.If this part breakdown or have a problem,all system is paralyze.

Normally for single phase air-condition system,the common type of electric motor is running capacitor motor and used scroll type compressor.The famous brand now in market such as Copeland,Daikin,Toshiba,Mitsubishi and others brands.

I want explain about single phase motor for air-condition or refrigerator compressor basic concept and how to check their winding condition and connection. read more

Filed Under: HVAC Tagged With: , , , , , , ,

Power Factor

03/02/2011 by Leave a Comment

For the simple and easy understanding,power factor is the Alternating current ( AC ) value of electrical efficiency.The ratio of true power flow into load of apparent power.Power Factor is the ratio of Working Power to Apparent Power.If equipment or machine running in maximum efficiency,we can save the electric cost and keep the long life span.

The range of power factor is between 0 and 1.Normally it state in percentage value e.g :  85 % pf.In power distribution,It in two condition of power factor,Leading or Lagging otherwise Inductive or Capacitive.They required the minimum level of power factor ( pf ) between 0.80 until 0.85 ( 80% – 85% ).If not they imposed surcharge to the owner of installation. read more

Filed Under: Theory Tagged With: , , , , ,