compressor windings

[Kevin Aye]

   It's my understanding that reading the windings should be different values, one pair 3x another, added together = third pair

I came across a samsung fridge that seems to be operating but the winding pairs all read 15

It's not overly warm but doesn't seem to kick in as strong as most, very little hum/buzz

I have not checked each to ground or voltage to compressor as I'm not sure that would tell me anything different

Does anyone know why I'm getting these readings?

Thanks very much

[Terry Carmen]

The compressor has a three-phase motor driven by an inverter that changes the single phase home power into variable frequency three phase power, to allow variable speeds.

[Kevin Aye]

   I understand yet have no idea what you're saying. It does explain the unique relay/overload being used on it. The only one I've encountered so far like that. Plastic case with triangle already set for no-brainer attachment. I'll definitely do some homework on these but for now could you answer couple easy questions?

Is the variable speeds for higher/lower temp requirements like turbo-cool?

Overall does it work the compressor less compared to most, especially when turned up for longer periods?

Can these compressors be checked with multimeter the same way? Specifically, the readings of each pin pairs being the same is what I should get for this model or no?

Hate to admit it but I've avoided learning certain aspects of refrigerators because they're my least favorite of the big 4. Luckily my brain isn't aging as rapidly as the rest of me seems to be

Thanks a lot

[Terry Carmen]

Any/all of the above.

A variable speed motor allows matching the compressor capacity to the load, so it can run fast (lots of BTUs and high energy usage) when you put a 10 gallon pot of hot soup in the freezer and slow motor with very low energy usage when the door hasn't opened for three days and it's just maintaining temperature.

> Can these compressors be checked with multimeter the same way? Specifically, the readings of each pin pairs being the same is what I should get for this model or no?

You can check them with a meter but expect different readings. There's no "start" and no "run". They're all the same, just wound 120° out of phase so all three windings can be energized in the proper sequence to turn the motor the right way at the right speed.

[WOOKIE]

3 hours ago, Kevin Aye said:

Hate to admit it but I've avoided learning certain aspects of refrigerators because they're my least favorite of the big 4. Luckily my brain isn't aging as rapidly as the rest of me seems to be

Take the MST course.  Samauri make's it easy to understand.  You will not regret it.  I don't know if you work for yourself or a company.  Regardless ,the course will make you valuable to the company and ,it will be very rewarding to you.  Eventually you will have to learn to work on them or, you will have to find another career field. Today's appliance's are becoming so technical.  No company want someone who just works on washing machines or dish washer's.  They need employee's who are trained to work on everything. You become a valuable asset.