Author Topic: Variable frequency drive (inverter), which to choose?  (Read 6422 times)

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Offline FinderbinderTopic starter

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Variable frequency drive (inverter), which to choose?
« on: September 12, 2023, 08:45:23 am »
I have very little experience with these devices.
I need it basically for various motors testing. Mainly consumer fridge motors as of now. It must have possibility to power from 1 phase 230V line. Must include local control panel, PC connectivity too. Compact size is a must. Good support is a must. I prefer it to be rather flexible for various motors and situations.

By now I have Delta VFD-EL 2.2kW. I thought it is enough before I bought it. But when I started setting it up I faced already few downsides. Size is ok, controls are ok, power reserve is ok, functionality is poor (Minimum supported rated motor current 3.3A ? Not suitable for smaller motors? No automatic motor setting? No vector mode?).
Surely VFD-E is more advanced (is it enough? remains questionable), or even more advanced MS300. Or maybe other manufacturer?
 

Offline Jeroen3

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Re: Variable frequency drive (inverter), which to choose?
« Reply #1 on: September 12, 2023, 09:55:49 am »
Why do people keep buying those ancient 7-segment operated devices.

Go to Danfoss or Vacon and get a unit with nice HMI that you can actually understand and configure.

Eg, find a danfoss VLT FC10x, should do what you need.
 

Offline FinderbinderTopic starter

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Re: Variable frequency drive (inverter), which to choose?
« Reply #2 on: September 13, 2023, 06:53:25 am »
Price aside, I was unsuccessful to find any Danfoss VLT FC10x (or even any series) which accepts 1 phase 230V supply. Moreover 2.2kW (or even less powerful) Danfoss is MUCH larger in size than ancient 2.2kW Delta.
 

Offline V_King

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Re: Variable frequency drive (inverter), which to choose?
« Reply #3 on: September 13, 2023, 10:04:24 am »
We use mainly Yaskawa drives only now. GA500 ones are really neat, lots of functionality and good support here in UK. Not all VFDs are the same and that is especially true for industrial ones. It is the internal software, which controls the motors which is important.
 
One thing to keep in mind, the VFDs you are looking at are best to be used as close as possible to their norminal ratings. If you want to have option to preprogram various current/voltage settings, then you need a servo drive (extra zero to the cost!). Just get a few drives to cover the currents you need. The little ones are cheap. And all major manufacturers offer 1ph-3ph drives up to 4kw rating, so again no issues there.
 
 

Offline Jeroen3

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Re: Variable frequency drive (inverter), which to choose?
« Reply #4 on: September 13, 2023, 07:23:01 pm »
Yeah I see, you need the FC202 series for single phase power input. Sorry. There are just so many of them.
Eg: FC-202P1K5
 

Offline FinderbinderTopic starter

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Re: Variable frequency drive (inverter), which to choose?
« Reply #5 on: September 14, 2023, 07:46:23 am »
Yeah I see, you need the FC202 series for single phase power input. Sorry. There are just so many of them.
Eg: FC-202P1K5

Unfortunately even lowest power 1.1kW 1 phase is too bulky (and even smaller size 3 phase 250W is also too bulky)  ??? For somewhat reason recent Danfoss drives are still anciently bulky...

Actually there is A1 form factor in Danfoss drives with acceptable size, but it is pain in the ass when it comes to choosing the right one.
« Last Edit: September 14, 2023, 08:30:34 am by Finderbinder »
 

Online BeBuLamar

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Re: Variable frequency drive (inverter), which to choose?
« Reply #6 on: October 02, 2023, 02:43:57 pm »
I used a lot of Yaskawa and Control Techniques drives. The Yaskawa like the GA-550 is very good. I have used them for small motors without problem. The Control Techniques Commander C200 is also a good one and less expensive than the Yaskawa. I am surprised that they use 3 phase motor in the fridge.
 

Offline FinderbinderTopic starter

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Re: Variable frequency drive (inverter), which to choose?
« Reply #7 on: October 16, 2023, 03:37:30 pm »
I am surprised that they use 3 phase motor in the fridge.

If fridge motor is controlled by variable frequency drive board it IS 3 phase. It won't work from 1 phase.
 

Online BeBuLamar

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Re: Variable frequency drive (inverter), which to choose?
« Reply #8 on: October 16, 2023, 04:37:15 pm »
I am surprised that they use 3 phase motor in the fridge.

If fridge motor is controlled by variable frequency drive board it IS 3 phase. It won't work from 1 phase.

I know that a VFD output is 3 phase but I am surprised that they use 3 phase in a fridge.
 

Offline FinderbinderTopic starter

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Re: Variable frequency drive (inverter), which to choose?
« Reply #9 on: October 16, 2023, 04:54:02 pm »
That is normal practice with more expensive fridges. I find 3 phase inverter motors in 20 years fridges too. Only cheapest simplest ones never uses 3 phase.

I know that a VFD output is 3 phase but I am surprised that they use 3 phase in a fridge.
« Last Edit: October 16, 2023, 09:39:49 pm by Finderbinder »
 

Online BeBuLamar

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Re: Variable frequency drive (inverter), which to choose?
« Reply #10 on: October 16, 2023, 10:22:29 pm »
I guess I am cheap. All the fridge I ever have only have single phase motor and doesn't have variable speed at all.
 

Offline FinderbinderTopic starter

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Re: Variable frequency drive (inverter), which to choose?
« Reply #11 on: October 19, 2023, 02:55:44 pm »
Here are compressor of consumer grade fridge and it's typical variable frequency board:
 

Offline yfayula

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Re: Variable frequency drive (inverter), which to choose?
« Reply #12 on: October 27, 2023, 03:59:27 pm »
Try going on the Automation Direct website, they have the help and support you need.
 

Online WattsThat

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Re: Variable frequency drive (inverter), which to choose?
« Reply #13 on: October 28, 2023, 05:20:54 am »
OP is in Lithuania, Automation Direct isn’t a viable supplier.

ABB and Siemens are the largest global brands. The ABB ACS380 is a possibility, not sure about Siemens.
An industrial general purpose VFD is always going to be much larger than a purpose built OEM product.

https://library.e.abb.com/public/37203278258840d0806872631b0da25a/ACS380_catalog_3AUA0000187460_RevE_EN_lowres.pdf
 


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