Hi
Don't know if this is the correct place to ask these questions but here goes.
An induction motor runs on ac supply am I correct in assuming that if the motor was rated at 370w then from ohms law at 240v it would draw 1.5A, then from ohms law again drawing 1.5A at 240V the total resistance of the motor would be 160 ohms.
The motor has 2 sets of coils in it (but joined together as one continious coil) one with 24swg wire and one with 28swg wire, the 28swg coil burnt out but there seems to be no damage to the 24swg coil, as I have all the time and patience in the world I decided to rewind the 28 swg coil, if I now check the resistance of the total winding it should read near to 160 ohms, all I have is a digital meter i do not have a megger to check the insulation.
I can calculate the resistance of each part of the coil from the ohmic value of a meter length of each swg wire so then can take an ohmic reading of each part if below what it should be then can I assume that part of the coil is burnt out.
I did manage to rewind the 28swg wire coil but when i switched it on it ran ok but after about 10 to 15 seconds it started to smoke so I switched it off do you think the other part of the coil the 24swg part is shorting where I cannot see it, it is not shorting to the casing.
What I forgot to mention was when I removed the 28swg coil I noted the number of turns for each part that went into the slots, in total there were 8 sections but the number of turns for the first and last sections were not equal so i made them the same same number of turns as the 2nd and the 7th sections which were 40 turns as opposed to about 30, have I done something wrong or would it not make a great deal of difference
PS I made a jig for winding the coil and took note of the direction of the winding
Don't know if this is the correct place to ask these questions but here goes.
An induction motor runs on ac supply am I correct in assuming that if the motor was rated at 370w then from ohms law at 240v it would draw 1.5A, then from ohms law again drawing 1.5A at 240V the total resistance of the motor would be 160 ohms.
The motor has 2 sets of coils in it (but joined together as one continious coil) one with 24swg wire and one with 28swg wire, the 28swg coil burnt out but there seems to be no damage to the 24swg coil, as I have all the time and patience in the world I decided to rewind the 28 swg coil, if I now check the resistance of the total winding it should read near to 160 ohms, all I have is a digital meter i do not have a megger to check the insulation.
I can calculate the resistance of each part of the coil from the ohmic value of a meter length of each swg wire so then can take an ohmic reading of each part if below what it should be then can I assume that part of the coil is burnt out.
I did manage to rewind the 28swg wire coil but when i switched it on it ran ok but after about 10 to 15 seconds it started to smoke so I switched it off do you think the other part of the coil the 24swg part is shorting where I cannot see it, it is not shorting to the casing.
What I forgot to mention was when I removed the 28swg coil I noted the number of turns for each part that went into the slots, in total there were 8 sections but the number of turns for the first and last sections were not equal so i made them the same same number of turns as the 2nd and the 7th sections which were 40 turns as opposed to about 30, have I done something wrong or would it not make a great deal of difference
PS I made a jig for winding the coil and took note of the direction of the winding