I think it is similar to TK46, Papst types part number from memory is 788-102.00. Three wires, Yellow and Green is 220V connection and a capacitor of either 1.55uF or 2.0uF, (depends what your mains frequency is) at 380v AC Type X or Y connects between the Blue and the Yellow.
I saw one of these, TK-46, many years ago, as I was the last Regional Servicentre in the UK before I retired.
I saw one of these, TK-46, many years ago, as I was the last Regional Servicentre in the UK before I retired.
I tried googling for Papst synchronous motor
Not much success.
I'd guess you have a syncronous motor that locks to mains frequency. That is what the reel to reel required for the tape drive motor.
It needs a two phase supply. That's what the capacitor does.
It can have any of a variety of speeds depending on how many poles are built into the construction.
50Hz 2pole gives 1500rpm. That the fastest you can get.
4pole, 8pole, 12pole would run at a fraction of that 1500rpm.
I don't know if 6pole exists, but you can get 16pole (187.5rpm).
8pole (375rpm) was common for TT drive, requiring ~11:1 reduction for 33.33 LP speed. 2% of slip gets very close to LP speed. I don't have data for the expected slip % for a rubber belt drive.
Jon,
could you give us more tech info on synchrous motors?
Not much success.
I'd guess you have a syncronous motor that locks to mains frequency. That is what the reel to reel required for the tape drive motor.
It needs a two phase supply. That's what the capacitor does.
It can have any of a variety of speeds depending on how many poles are built into the construction.
50Hz 2pole gives 1500rpm. That the fastest you can get.
4pole, 8pole, 12pole would run at a fraction of that 1500rpm.
I don't know if 6pole exists, but you can get 16pole (187.5rpm).
8pole (375rpm) was common for TT drive, requiring ~11:1 reduction for 33.33 LP speed. 2% of slip gets very close to LP speed. I don't have data for the expected slip % for a rubber belt drive.
Jon,
could you give us more tech info on synchrous motors?
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Thank you both for reply, yes there us very little technical info on Papst motors...The motor type is 7882 - 036. Other numbers are KM20.50-4/8-140 D , year 22.8.1960... I checked wires going to motor, there are 6 wires, Yellow, Red, Green, Red/Black, Yellow/Black and Green/Black...Would this help anything Jon? Would be good if I could find schematic, not easy too...
Andrew T has just about nailed it, regarding Synchronous motors. The more poles it has, the slower it goes.
I am trying to find as 12 - 15 V synchronous motor that has 8 poles. Anyone got one spare? It is used in a Russian built telescope and drives the head around to follow the planets.
I am trying to find as 12 - 15 V synchronous motor that has 8 poles. Anyone got one spare? It is used in a Russian built telescope and drives the head around to follow the planets.
I did some measurement on wires, resistance between any solid color, Red/Green/Yellow is 52 ohms and between mixed colors RedBlack/GreenBlack/YellowBlack is 32 ohms...does it say anything? Would anyone be able to sketch how to connect it to supply for some test and where goes capacitor?
Would this help anything ?
Yes, two speed motor + 5µF motor run cond.
Does that mean it can be wired for a different number of poles?
I do not know, but I know that the motor is running at two voltages 165 & 117V AC.
Later I will draw the wiring pattern.
Yes, two speed motor + 5µF motor run cond.
That does not explain the claim to be two speed.I do not know, but I know that the motor is running at two voltages 165 & 117V AC.
Later I will draw the wiring pattern.
That does not explain the claim to be two speed.
I said, later. That does not explain nothing.
If you do not want to wait draw alone.
stoN_COLD, just this machine (TK28) was running on 240 volts, unless you know that there was step down transformer to 165 and 117 volts...
It's the old trick, the same transformer motor running in the primary side.
I have two identical motors actually (type 7882-036), one made on 22.08.1960, the other one 19.12.1960; Serial number on first is 2299647, on second 2516190...the difference is 216,543 pieces...PAPST was very busy at the time, even if we take into account that they were exporting to U.S.at the time, or maybe because of that...just little statistics while trying to find some diagram...
Unfortunately no, do not have original transformer...Tomom, do you have original transformer?
Here is diagram which I think suit motor that I have, so stoN_COLD was right, it is 2 speed and use 165 and 117 volts. If I am correct switch S2 switches to ground or neutral...Just do not understand that 20 ohm resistor and capacitor in series...wires from left are Red/Black, Red, Green, Green/Black, Yellow/Black, Yellow...
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Here is diagram which I think suit motor that I have, so stoN_COLD was right, it is 2 speed and use 165 and 117 volts.
I am allways right.
Just do not understand that 20 ohm resistor and capacitor in series.
Spark killer.
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