I live in Romania and my profession is artist, and not an electrician. But dont be easily fooled, I do know a lot of general and some quite dedicated electrical details. So.. the story is that my father bought a Very long time ago, like in the 80's, a russian made Magnetophon, an audio device wich worked with 2 Big magnetic tape Wheels. And as a naughty adolescent that I was, around 1998, I dismantle that magnetophon to bits, for my fathers terror. He got over it (I think). Haha. But I kept it's 2 identical motors that are having an unusual working voltage of 70V per motor. Ive always dream of repurpose these motors. So I need your expert opinion about how to make them work.
The yellowish sticker I put it there, with the measured coils: 115ohm and 90ohm (rounded).
So... from my calculations,
I=V/R=70V/90R=0.7A@54W for 1 coil and I=V/R=70V/115R=0.6A@42W for the second coil. And then summed up 0.7A+0.6A=1.3A drawn from the power supply to drive both coils of a single motor.
My problem is... how to actually drive these coils? They are working based of the 50Hz AC? or they need DC? and that will complicate the driver exponentially. Are these universal motors? (running both with AC and DC?) These are questions in my head, but I didnt test anything yet.
From my general knowledge, all the coils in a motor are in series with one another. But these are clearly in parallel, from the measuring. I didnt open the motor yet, and I dont know (if or which ) coil is for the stator or for the rotor. For sure at least one coil is for the stator because I can see the stator is made of a coil, but I can not see the number of them. I should open one and take a look inside to clearly identify what is going on there.
A closeup on the original label:
The soldering metal pad is a single vertical <<bended>> metal sheet, that extends up and down for easy soldering connections. There are only 4 connections, with 4 wires. Not 8.
I have 2 variable power supplies:
Right: the white one is a SMPS(switch mode power supply), with a maximum output of 30V@5A
Left: the Red one is a Variac(variable transformer) for 1 AC phase (not 2 phases) with maximum output of 1000VA or 330V@3A (for a rezistive load)
I acquired the variac a few days ago (from germany via ebay), and one of the many reasons I bought it, was to test my motors I have for literally decades on my shelf. I think a variac is a very good option to have in my arsenal. Ive always wanted one... and now I have it. And is beautiful. Aaah.
Anyway... all this being said, I want your advice how to TEST and RUN these motors, without endanger my equipment or the motors themselves.
Alone... I am a bit unsure and somewhat afraid I will proverbially "fucc" something up. Is better to have an expert eye over my shoulder.
Thank you very much.
The yellowish sticker I put it there, with the measured coils: 115ohm and 90ohm (rounded).
So... from my calculations,
I=V/R=70V/90R=0.7A@54W for 1 coil and I=V/R=70V/115R=0.6A@42W for the second coil. And then summed up 0.7A+0.6A=1.3A drawn from the power supply to drive both coils of a single motor.
My problem is... how to actually drive these coils? They are working based of the 50Hz AC? or they need DC? and that will complicate the driver exponentially. Are these universal motors? (running both with AC and DC?) These are questions in my head, but I didnt test anything yet.
From my general knowledge, all the coils in a motor are in series with one another. But these are clearly in parallel, from the measuring. I didnt open the motor yet, and I dont know (if or which ) coil is for the stator or for the rotor. For sure at least one coil is for the stator because I can see the stator is made of a coil, but I can not see the number of them. I should open one and take a look inside to clearly identify what is going on there.
A closeup on the original label:
The soldering metal pad is a single vertical <<bended>> metal sheet, that extends up and down for easy soldering connections. There are only 4 connections, with 4 wires. Not 8.
I have 2 variable power supplies:
Right: the white one is a SMPS(switch mode power supply), with a maximum output of 30V@5A
Left: the Red one is a Variac(variable transformer) for 1 AC phase (not 2 phases) with maximum output of 1000VA or 330V@3A (for a rezistive load)
I acquired the variac a few days ago (from germany via ebay), and one of the many reasons I bought it, was to test my motors I have for literally decades on my shelf. I think a variac is a very good option to have in my arsenal. Ive always wanted one... and now I have it. And is beautiful. Aaah.
Anyway... all this being said, I want your advice how to TEST and RUN these motors, without endanger my equipment or the motors themselves.
Alone... I am a bit unsure and somewhat afraid I will proverbially "fucc" something up. Is better to have an expert eye over my shoulder.
Thank you very much.
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