Why Starting Winding Resistance Is High

Why Starting Winding Resistance Is Higher From Running Winding

As you know there are two types of winding in a single-phase motor induction motor. in which one is called main winding (running winding) and 2nd is auxiliary winding (starting winding). Today we will learn about why starting winding resistance is high.  In this blog, I write about how to identify the start run and common wires in a single-phase motor or refrigerator compressor. I also write about the testing of single-phase motor and starting and running winding resistance.

why starting winding resistance is high


When we test the winding of a single-phase motor we find that starting winding resistance is high than running winding when we test resistance with "common" wire.

In a single-phase induction motor, compressor or ceiling fan, we have 3 terminals or connection wires. To find out the start run common wires. We need an ohm testing meter or multimeter. To find out the common wire, test each wire with one another. The high resistance two wires will be "start" and "run" wires. And the 3rd wire will be "common" wire. 

So we find out the common wire, we need to find out the run and start wire. So start wire resistance will be high with common wire and run wire resistance will be low with common according to "starting" wire.

So why starting winding resistance is high. it because of the wire gauge which is used for starting winding, As you know the main work is done by the running winding (Main Winding). So for "running winding" thick wire is used than "Starting winding".  As you know that thick wire has low resistance than a thin wire. So starting winding are made from thin wire than running winding. Just because of the thin wire gauge the starting winding resistance is high than the running winding resistance. 

Now I hope you understood "why starting winding resistance is high than main winding (running winding) resistance. however, if you have any questions according to the post you can ask your questions in the below commenting system.

Sikandar Haidar

Electricalonline4u.com is a hub of electrical and electronics tutorials and easy diagrams.

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