Please help me to convert my single phase motor original wound aluminum wire i would like to convert the winding to copper magnet wire

For a single phase motor, winding resistance is a contributing factor to performance. To change from aluminum to copper wire, decrease wire size by 2 AWG sizes; keep the same turns, pitches, and connection as the original data.

A good idea for this motor is our pure copper rotor in high pressure die cast

Thank you i'm working on it sir,it could be much better my workshop now,but then i wound it and try in decreasing to 1 size and the original turns,i got high amperes.

While you convert the winding material from aluminum to copper or other way round you have to take care of individual winding current density too along with the winding impedance. Otherwise your motor can run hot and have shorter life

How about the torque it will affected if the winding was converted?base on my experience the more decrease of wire size the more lesser the torque.

Resil, you said one size down, same turns, high amps ... was that loaded or no load?
What percentage of name plate current?
Test voltage the same as name plate rating?
Open frame or closed?
I would have recommended 1 size drop as my standard practice.
Depending on the Sq mils per amp sometimes 2 could be in order,

Usually single phase motors are less than 3 horse power so it may be less expensive to replace the motor with a three phase model.

I got almost 8 amps i cant reach 50% without load for possible motor will work normal.motor is closed frame this the way i wound the motor Mr. Mark,i wound it decrease the wire size in two the amps (without load) was good but the torque become lower,then i used to wound it my way decrease one size then i added 10 turns from the original turns,do you think that the area circular mill of the #17 aluminum wire will almost reachout the area circular mill of #18 copper wire,here we can solve this problem if you have some idea or table for the comparing of aluminum to copper.Motors like this are generally used in our community in furniture shops,i need to fix this problem to make this motors got more lifespan,mostly 3hp to 7.5hp,my main target here is to get the 50% no load from the rated amps of motor,that we usually applied to 3phase motors