Nigel's Speed Controller parts list, schematics and instructions

[analogadikt]

The motor circuit shall have to remain as it is and the NSC shall connect at the same points where you are connecting your a/c supply from the wall outlet now.  This is because the NSC is not a multi phase supply.
You need to find out the motor wattage or VA rating and work on whether the output transformer and other components are up to the job or need uprating. I shall not be able to help with that as I have no knowledge beyond what I have said here.

Regards,

Anwesh

[nigel]

Sorry i do not know the specs, it was taken of grundig tk9 r2r recorder. The motor is running with capacitor, and ir is working very good, it is a very good motor though, and i am planing to biuld a TT with it. I have a picture of it, maybe it will tell you more, than it tells me

Hi there 

I'm afraid I don't know the first thing about that motor and I couldn't find anything from a quick Google, either. 
Unfortunately the picture doesn't tell me much, I don't claim to be an expert on motors ...
Maybe someone else knows something about it  but, in the absence of any more information, I'm just going to have to say "I don't know", sorry I can't be more helpful.
Thanks for your kind words, though 

[Mantas35]

Thanks for the answear guys. Regarding the motor, as far as i know and read, it is Papst capstan also called Aussenlaufer, 3 phase, delta wired, hysteresis synchronous motor. I am runing it now with 3uF cap between two phases, straight from the wall outlet, and it works fine, apart from its speed, way too fast…. It locks to mains frequency, and the only way to adjust speed, is variable frequency controller, or to get a 33.3 rpm, i could play with a pulley and platter ratio, but thats not the best idea i believe. Correct me if i am wrong, Nigels controller would work for a single phase connection, while other two connected to capacitor? To get 3 different angle phases i would need 3 different amps? How about oscilators, would i need 3 of them, or the one used in Nigels controler would generate 3 sine waves?

[nigel]

Thanks for the answear guys. Regarding the motor, as far as i know and read, it is Papst capstan also called Aussenlaufer, 3 phase, delta wired, hysteresis synchronous motor. I am runing it now with 3uF cap between two phases, straight from the wall outlet, and it works fine, apart from its speed, way too fast…. It locks to mains frequency, and the only way to adjust speed, is variable frequency controller, or to get a 33.3 rpm, i could play with a pulley and platter ratio, but thats not the best idea i believe. Correct me if i am wrong, Nigels controller would work for a single phase connection, while other two connected to capacitor? To get 3 different angle phases i would need 3 different amps? How about oscilators, would i need 3 of them, or the one used in Nigels controler would generate 3 sine waves?

Hi,

There is a project for a multi-phase controller on DIYaudio, I believe. I don't know anything about it, but you might have a bit more luck talking to them - my controller was only ever really intended for single-phase motors.

https://www.diyaudio.com/forums/analogue-source/298018-diy-4-phase-sinewave-generator-turntable-motor-drive.html

Hope that helps 

[Mantas35]

Thanks Nigel, i allready saw this, i think it might be more siutable for me. Yours is just super detailed, because i quite newbie in this controller thing

[Andr039]

Hi Mantas
I don't have the correct answer to your question. But what I know is that Miracord/Miraphon turntables (their early versions) were equipped with hysteresis synchronous Papst motors. I have a Miracord but I have never ever plugged it into NSC. I may run such experiment, i hope it wont kill NSC. I will report later my tests' results.
best,

[Mantas35]

That would be a very useful info, try and let us know

[Andr039]

quick update.

Installed Arduino based tach



stuck the alum foil piece at the rim of the platter



plugged the Miracord into the NSC and run the tests

1. Does Papst motor (installed on Miracord) plugged into NSC work? Yes.
2. Can speed (RPM) be adjusted by NSC? Yes.
3. Does the usage of NSC change the torque of the motor? No idea, did not measure.

best,

[Mantas35]

That is a very usefull info Andrej, Thank you. I have made my mind now, i will be constructing NSC, i have been analysing miracord schematics last night, and yes they have papst motors connected through capacitor which shifts the phase. So NSC will perfectly work with capacitor for my motor as well. I have read a few post, that removing capacitor and connecting the motor with separate shifted phases, makes it work even better, but thats too difficult for my knowledge. NSC will do, and it will be a huge improvent in motor control i believe. So now the question is where could i order a pcb for NSC?

[Andr039]

You are welcome.

where could i order a pcb for NSC?

See the first post of the thread or contact Nigel directly 

[Mantas35]

By the way Andr, have you noticed any sound, or motor work improvments, when connected your Miracord to NSC?

[Andr039]

Hi, Mantas

No, I haven't noticed as I didnt check for the sound at all. It was a very rough test. My Miracord was not in use for many years, saying frankly it was in store in cupboard. I took it out and plugged it in and checked the speed. To answer your question the turntable needs check-up and service before listening sessions. Sorry, I have no time for such an experiment.
Good luck with building NSC, a very useful tool 

[Mantas35]

Ok, thanks i need NSC definently. 

[Andr039]

Mantas,
what's your native language?
Your name Mantas (if it's your real name) sounds Baltic to me. If you speak/read Russian, you may look to this link where there is a long thread about correct power supply for hysteresis synchronous Papst motors. In Russian 

best,

[stratokaster83]

Mantas,
what's your native language?
Your name Mantas (if it's your real name) sounds Baltic to me. If you speak/read Russian, you may look to this link where there is a long thread about correct power supply for hysteresis synchronous Papst motors. In Russian 

best,

But the generator discussed there is not really designed to be user-adjustable in real time. The output frequency can be adjusted only by +/- 1.5% and you also need to adjust phase shift and output voltage every time you change the frequency.

Basically, it's a good design for powering 3-phase motors and reducing their vibrations, but you need to use a different solution for switching from 33 to 45 and back.