Some of the Papst motors have capacitance requirements for both 50 and 60Hz power supplies, these values may be extrapolated for
other frequencies. I would always recommend however that a 3 phase supply, as, for example, provided by the SG4 is a better solution.
other frequencies. I would always recommend however that a 3 phase supply, as, for example, provided by the SG4 is a better solution.
They could be bipolars. It's an odd way to draw them though. That's what confused me.
Its a very old style - the bar is the base and the arrow shows the emitter current passing through it.
Theo pabst sync motors I have worked with all need 90 degrees between the coils. A state variable oscillator will get younthe correct phasing for free. Then two amp's and two transformers and you are on the air. I did this for Rockport a long time ago.
If you want the smoothest, vibration free rotation of a Papst Aussenlaufer motor you should always use a genuine 3 phase supply such as the SG4..
Are the phases at 120 degrees? All the motors I checked (30+ years ago) were 90 degrees. I discussed this with a motor engineer in the us and he validated the solution. You can check th ephase relationship with a scope. just spin the motor and look at the phase relationship.
There are other tricks like varying the drive levle with speed and using a current mode drive to reduce the effect of the harmonics in the less than perfect magnetic structure. It was a very interesting project some 35 years ago.
There are other tricks like varying the drive levle with speed and using a current mode drive to reduce the effect of the harmonics in the less than perfect magnetic structure. It was a very interesting project some 35 years ago.
Most turntable motors have two equal windings, intended for 90 degrees phase shift. At a higher frequency, expect to have to reduce the phasing capacitor by a third.
Yes, the Papst Aussenlaufer motors are almost all 3 phase delta wound motors. I have more than 10 of them, with different numbers of poles and voltages, they all have 3 wires with the same resistance between any 2 wires.
Very good
On the picture STM 610 komplet motor end controller power supply. Motor Papst on the picture
STM 610 studio recorder built over 8000 pcs
STM 310 built 3500 pcs
On the picture STM 610 komplet motor end controller power supply. Motor Papst on the picture
STM 610 studio recorder built over 8000 pcs
STM 310 built 3500 pcs
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Any idea about the Papst motor in the Elac 50H ? Is it a three phase motor running in single phase ?
Regards,
Anwesh
See if two caps are used to get three phase from single phase, or measure winding resistance.
Or there is a drive of some sort.
That will tell you if it is a 3 phase motor being run from 1 phase supply.
Or there is a drive of some sort.
That will tell you if it is a 3 phase motor being run from 1 phase supply.
You can't get three phases from single phase by using 2 capacitors; a single capacitor provides a phase shift for the second phase and Kirchoff's law provides the 3rd.
I had hoped to answer this question by means of the evidence from all of the motors in the picture I provided above, which, without exception, are 3 phase delta wound motors, but can be used, somewhat less efficiently, by means of a phase shift capacitor.
I had hoped to answer this question by means of the evidence from all of the motors in the picture I provided above, which, without exception, are 3 phase delta wound motors, but can be used, somewhat less efficiently, by means of a phase shift capacitor.
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Phase R to phase Y one capacitor, then phase Y to phase B second, equal capacitor.
This was used a lot, it is a valid method, the first cap causes a 120 degree phase shift. Second cap makes it 240.
Another method used is by specially wound transformers, and yet a third method is to wind the motor in that way, combined force and transformer coils.
Without proper details, it is hard to tell at times, particularly in small motors with potted windings.
This was used a lot, it is a valid method, the first cap causes a 120 degree phase shift. Second cap makes it 240.
Another method used is by specially wound transformers, and yet a third method is to wind the motor in that way, combined force and transformer coils.
Without proper details, it is hard to tell at times, particularly in small motors with potted windings.
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A lot of 3/4/5/6 phase winding splitters and variable frequency drives are found in industrial drives, those are rated from 100W and out to several MW.
For a turntable, it is an odd item really. Too small...
For a turntable, it is an odd item really. Too small...
Ok, can you show how this would work with a delta wound 3 phase motor? Specifically a 3 phase delta wound hysteresis motor? A schematic perhaps?
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