is it 12 volts or 232 volts
- Thread starter bernardgreen
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I think everyone knows the answer. Presumably it wasn't really a question.
Technically no real problem. Brushless DC motor - magnet pole pieces and an inbuilt invertor with direction based on polarity.
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I'd call that a self-synchronous motor - it's not synced to any reference outside itself. I suppose if it had an internal Xtal oscillator that would do the trick.
It is listed as a spare part for an egg incubator. The rusted motor in the incubator to be repaired is connected the mains supply.
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What they have done is to add the invertor to make the total assembly a 12V item, but keep the same motor part number. They also stuck their own label on the motor. Usually this motor part number comes from China as just the motor with two wires coming out.
It may be a spare part for a similarly modified motor in a specific incubator. Using the same part number was likely to confuse.
It may be a spare part for a similarly modified motor in a specific incubator. Using the same part number was likely to confuse.
Do you mean "... a 220V item"? If so, that would seem to be the most likely explanation.
Kind Regards, John
No invertor in the unit, having dissected the unit it is clear that one lead to the motor is connected to directly to Neutral and the other wire to Live via the contacts of a small relay on the control PCB,
The label on this motor is TY 50AF 230-240 V AC 50/60 Hz
Given that the motor is exposed in a chamber with high levels of humidity having a motor operating on an SELV supply would be sensible.
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I guess it depends what is in the black box in the photo. All other pictures on the internet show the motor with two wires coming out, and thats it. The wire colours change in the op picture to red and black, I had assumed this was because they had to be for dc. If the extra block is not an inverter than of course I'm wrong.
That was also what I thought/expected, but bernard seems to have indicated that such is not the case. If I understand him correctly, that little black box does not contain an 'inverter' (not that that term, alone, is enough to describe something with a DC output!).
Kind Regards, John
The motor itself, looks identical to the 240v motors commonly used on 3-port central heating valves.
The motor in the unit for repair does not have that black box, just a plug at the end of the wires,
I realise that, so the existing motor obviously runs directly off the mains supply. However, if that one you illustrated (complete with 'black box') is an acceptable 'replacement' for what you currently have, and it really were a 12V motor, then that 'black box' would presumably have to contain something which changed mains voltage into 12V? However, if I understand you correctly, it does not - is that the case (or have you perhaps not yet got one to examine?)?
Kind Regards, John
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