HOW INVERTER DRIVEN COMPRESSORS WORK

How does an inverter driven compressor work? Our GREE tech advisor offers you a simple explanation with help from this animated visual diagram. From line voltage to the bridge rectifier, current flow to capacitors, DC buses to IGBT’s, and from the inverter board to thermistors, this step-by-step introduction to inverter technology breaks down what’s really going on inside an inverter driven system.
Once you understand how inverter technology works, it becomes clear why GREE is simply the best in cold climate heating and efficient air conditioning.

[@amirhesamnoroozi3741]

Perfect 👌 answered my question: Why we need an inverter when the supply power is already ac? And what a variable speed device has to do with an inverter?

[@vadimtyutyunnik353]

Finally, a clear explanation. It's similar to Pulse Width Modulation. Some manufacturer put on their comressors 100-360VDC and 40-120Hz. I would ask them to draw the graph for me, which would reflect 100VDC 100Hz. How a sine wave could be called a "direct current" or how the straight DC could have any frequency. As soon as DC gets any frequency, it becomes AC.

[@solexxx8588]

It's DC still because it was rectified and flows in one direction as I understand it. AC alternates direction. Unrectified AC will not spin an inverter compressor for this reason.

[@olisahopene947]

thanks for the explanation, it has given me a broader understanding of the inverter systems, and doubt about inverter AC applications.

[@USA-GreedyMenOfNoIntegrity]

Excellent. Keep these great videos coming. Thank you.

[@ayawkol2mxvi]

Good day sir what if i will use a adapter? to the specific voltage of my compressor,,thank you in advance sir..

[@seshachary5580]

very educative thank you regards

[@GREEComfort]

Glad you enjoyed it

[@charlesm.8807]

Nice explanation Mr. Greg

[@GREEComfort]

Glad it was helpful!

[@NROhvac]

It’s important to note that these compressors vary the speed based off of load. These units must have smart equipment installed with it, it all communicates. If the load is great inside the house, the compressor will increase speed. Also there is humidity involved as well, but it’s all logic controlled by the boards. These boards from the outdoor, thermostat, relay panel, and indoor all communicate thru data wire. This data wire tells the indoor fan and outdoor compressor what speed to run at based off load (load is measured by the thermostat). Essentially, if the house is 74 and your setpoint is 72, your compressor and indoor fan will back off a bit. If it’s 78 inside and you set it to 72, you will potentially see your compressor and indoor running at full speed or close to it. There is humidity control as well that factors in I believe, correct me if I’m wrong. But to any of you who are confused on the determining factors that drive the speed, it’s the load which is communicating thru a data wire

[@hemetelectricalservices]

Incredible topic! Great explanation 🎉

[@ChonieMonsanto]

thank you sir for the short video and i got an idea for this topic ,and happy to see more videos for your next simulation presentation.

[@GREEComfort]

You're most welcome

[@mobilecommunicationsnetwor5268]

So just for clarification then this is a variable speed three wire or three phase DC compressor?

[@laidbairech9006]

If I try the compressor and inverter with the , variaiteur de vitesse it work?

[@f95ios]

thinks for all 💜

[@TOSOTsuppliesSharing]

splendid animation for explain. Thank you

[@GREEComfort]

Glad it helped!

[@99kevin99]

Great teacher. Hey teacher, in your experience/opinion how reliable are these DC Compressors going to be? I got 23 years on my ol' Bryant Heat Pump so far in Florida...

[@mooch91]

Thanks for the video Greg. Where can one find information about the programming of the board (specific to the Flexx) to understand the speed control and cold climate heating control for the purpose of troubleshooting operation? The service manuals are light on any helpful detail of the control strategy. Thanks!

[@GREEComfort]

We're happy you found this video useful! We also have a video that speaks to setting the proper fan speed of the Flexx here: kzbin.info/www/bejne/e5-TfpisaK95bqc. If you still have questions, please let us know. Also, be sure to subscribe to our GREE Comfort channel so you can be notified when we release new tech tips or go live with other video content. Thanks for digging in and learning more about proper installation!

[@mooch91]

@@GREEComfort Thanks. My question was about how the compressor controls its speed. More details about what it's targeting, why it's ramping up, when it ramps down, how the various sensors play in to the control strategy, etc.. Need more information to support good troubleshooting. Thanks.

[@GREEComfort]

Some of the functionality is proprietary, but the FLEXX unit for example, has a pressure sensor (pressure transducer) that allows the unit to monitor head pressure in heating and suction pressure in cooling. This, along with the thermistor sensors in the condenser, can determine load on the system and adjust the speed of the compressor and condenser fan motor.

[@georgesvgg7456]

Is the compressormotor basicly a 3 phase AC motor (with a variable frequency drive) or is it a BLDC permanent magnet motor, which also needs a three phase voltage to run

[@GREEComfort]

Hi @georgesvgg7456, we dug into your question during a recent Talking Comfort LIVE show. Check it out! kzbin.info/www/bejne/p52boIiPr8ane5Y

[@wadib3eed7]

I have question. When the room temperature reaches to a certain temperature 25 degree the inverter slows down the speed at a percentage, but much this percent of normal speed ? 10 % or less ? when the temperature goes up again to 30 degree the inverter accelerates to high speed and stay on it until the temperature goes down to 25 degree but the speed at this point rapidly deaccelerates or takes a few seconds or minutes to decelerates to reach the 10% of the normal speed ?

[@danielmorse4213]

Great job. Thank you.

[@GREEComfort]

Thanks for watching!

[@ytSuns26]

Any chance I could use solar directly. 300+ volts isn’t a problem . It’s creating the frequency for speed control. I think it would be awesome to nit get involved with ac current at all .

[@erwinsibug7681]

How to solve p1 error code vrf gree

[@GREEComfort]

Hi @erwinsibug7681 We recently addressed your question during our recent episode of Talking Comfort LIVE. Check it out here!: kzbin.info/www/bejne/mZiZnamjqdCDbs0

[@mobilecommunicationsnetwor5268]

What has been the reliability of the electronics? Do you need some kind of environmental packs since they're outside in the weather? What about the compressor itself any history in terms of reliability?What would be the cost of this compressor if you had to replace it?

[@jasonkeys1661]

Yepp, just outside warranty. like everything.. rigged like finacial markets .... expensive them pcb .. alilbaba $ 65... Retail $2500 little compressor work harder , look harder & dont believe the E S G by the uncumbence. power to the people.. but i think its too late..😢😢

[@mobilecommunicationsnetwor5268]

What gas is required for this compressor? What about the oil?

[@solexxx8588]

It's for any refrigerant with an invertor compressor.

[@herseem]

There's an error in the animation: You show the current flowing the wrong way through one of the transistors. I think what you meant was that the switch is engaged to allow current to flow down INSTEAD of through the diode that is in parallel with it the wrong way, and the current flows back up through the diode the correct way instead of the switch it is in parallel with.

[@eniszulufepustampasic2799]

He does not have a clue... he is just presenting something he does not understand...

[@Abundance172]

Wish I had you knowledge

[@mukeshbedi8449]

hello sir uvw compressor direct start circuite displain and making digram

[@meowmeowbobo]

oh...it basically is a stepper motor with its own rectifier to supply dc power. A logic circuit or computer assisted motor with dc power.

[@USA-GreedyMenOfNoIntegrity]

They don’t run backwards.

[@wordperalta9519]

En español por favor

[@mrbillpurcell6203]

WHY can't I find the Cassette installation video? e 24,000 btu, and even tech support could answer issues on vertical drain pump limits and s the check valve to prevent flood back, and how to use that silly cardboard template on an existing trussed and drywall lid

[@MrDBWeatherMan]

So technically shouldn’t an inverter compressor technically be called a rectifier compressor?

[@galporgy]

No it’s AC (fixed Hz)-DC-AC (variable Hz). The rectifier’s DC output is inverted hence the name.

[@tyrotrainer765]

@@galporgy Okay........I am curious as to the type of motor; am I right in assuming that it is a self-excited brushless single phase AC motor?

[@jasonkeys1661]

wait until you have to start replacing the electronic boards after warranty gone .. your l find out just how much money youll save on the BS efficiency, cop of 10/66 only at certain times in the weather .. 3 - 5 COP more like , horses for course. Dont believe the ESG

[@TomSon-ej3pw]

Wait, so aren't these DC motors effectively 3 phase AC?

[@solexxx8588]

No, they are rectified to DC.

[@SanelKeys]

Few incorrect informations and nothing new. What was the point of this video?

[@USA-GreedyMenOfNoIntegrity]

To get your smart arse into the mood to make a video better than this one. Go ahead let’s see it AnalKeys.