[Phy6]

Hi, I'm looking to build an aluminum cutting 3 Axis with a 4KW spindle (from eBay). I only have 220V single phase in my shop, and I'll be reusing a 60Amp welder plug I have on the wall.

There are some VFDs that will take 220V Single Phase OR 220V 3 Phase as inputs, but am I right in thinking I'd need to double the VFD size when using 220 Single Phase as the input?

For instance, if I had a 4kw(5HP) spindle, I'd need a 5HP VFD if I had 3 phase as the input to the VFD. Since I only have single phase input, I'd need a 10HP VFD that still allows 220V single phase input (so that it will put out 1/2 of 10HP (5HP) in 3 phase for the spindle)

In that case, can anyone recommend a 10HP VFD to use with 220V Single Phase input and 220V 3 Phase output?

Thanks for any clarification, have a nice day.

[Al_The_Man]

I would look at individual manf. Some recommend de-rating, others design for the equal wattage.
Hitachi appear to be a nice product with I believe the 1ph and 3ph models.
Usually 5hp is the upper limit for 1 ph VFD.
Al.

[Phy6]

Al, thanks for the reply. And my apologies--looking at related threads this should have been posted in Electronics-VFD.

One solution I had bookmarked was a Hitachi WJ200-055LF.
In the PDFs that Hitachi puts out, specifically the second table on page 6 of this PDF:
http://www.hitachi-america.us/suppor...rt/NT3251X.pdf

It seems to indicate Single Phase 220v is an option. I hope that is not a typo. I also found a reference to the Wj200-055LF being used with 220V single phase input on this Practical Machinist thread:

Hitachi WJ 200 reviews

I've seen this VFD described as 3phase input in some places, so I'm searching to verify it can be used with both 3phase and Single phase 220v inputs. (I would expect to see two ratings tables, one for single phase input and one for three phase). Also do you know if the LF series is the right kind to be using with a CNC spindle?

[Al_The_Man]

I thought Hitachi had a 5hp 1ph model?
Shoot this guy a message, he is a Hitachi dealer and he has answered my questions before.
ebay 160756159427
Al.

[Phy6]

I thought Hitachi had a 5hp 1ph model?
Shoot this guy a message, he is a Hitachi dealer and he has answered my questions before.
ebay 160756159427
Al.

Thanks, that is the same seller I was looking at for the 055LF model. By the way, that ebay listing causes the same confusion I'm having: He describes it as a single phase input VFD, but the brochure lists it as 3 phase input. Unfortunately, the seller get so many emails that "ask a question" feature is disabled. Do you happen to have is email address so I could contact him?

[Al_The_Man]

I don't have it any more, it was some time ago and I went through the ebay messages, rather than direct.
Al.

[mike_Kilroy]

Thanks, that is the same seller I was looking at for the 055LF model. By the way, that ebay listing causes the same confusion I'm having: He describes it as a single phase input VFD, but the brochure lists it as 3 phase input. Unfortunately, the seller get so many emails that "ask a question" feature is disabled. Do you happen to have is email address so I could contact him?

I am a 100% certified Hitachi Distributor. I can tell u that ANY hitachi WJ200 WILL *WILL* work on 1ph input. all are rated 3ph input. for 1ph input simply reduce the HP rating by 2. simple. no questions. SO....

LF is LOw volt (230v) vs HF Hi voltage (460v) model. simple

hitachi lists upto -022 (3hp) models as 1ph input w/o derating: above that derate 2x to be safe.

-055=5.5kw rated drive: will work for 5hp drive: most of our competitors require u to go up one more size to 10hp or -075kw size.....

we charge a bit more than el cheapo ebay folks but we will help u make it work, pick right one..... so just pick the -055 ebay model and u shud be good to go. if u want quote from us, ask.

good luck!

[Phy6]

I am a 100% certified Hitachi Distributor. I can tell u that ANY hitachi WJ200 WILL *WILL* work on 1ph input. all are rated 3ph input. for 1ph input simply reduce the HP rating by 2. simple. no questions. SO....

Excellent! I wish that was more apparent in the documentation or brochure.

Just to reiterate, and for the sake of those searching in the future:
This model:
Model: WJ200-055LF Inverter, 200-240 volt, 3 phase, 7.5 HP CT (10 HP VT), 14.8 CT (17.5 VT) Amps...

can be wired for Single Phase 220V/240V input..

for successful use with a 4KW (5HP) Spindle (220V 3ph).

[mactec54]

Phy6

There is a VFD drive that will do 5Hp with single phase 220V input, made by Polyspede


PC1-50: Variable Frequency Phase Converter 5 HP AC Motor VFD Drive

[Phy6]

Phy6

There is a VFD drive that will do 5Hp with single phase 220V input, made by Polyspede


PC1-50: Variable Frequency Phase Converter 5 HP AC Motor VFD Drive

Interesting... I'll have to read up on Polyspede. I've only heard of people using the chinese and hitachi vfd's (because I'm a noob). Is this a reputable brand, and what would you rate as a better and worse brand than polyspede (so I can build my mental model)?

[Al_The_Man]

I would tend to stay away from the Chinese versions.
Also it is worth paying the slight extra to ensure you get a Sensorless Vector type VFD.
Al.

[mike_Kilroy]

Excellent! I wish that was more apparent in the documentation or brochure.

Just to reiterate, and for the sake of those searching in the future:
This model:
Model: WJ200-055LF Inverter, 200-240 volt, 3 phase, 7.5 HP CT (10 HP VT), 14.8 CT (17.5 VT) Amps...

can be wired for Single Phase 220V/240V input..

for successful use with a 4KW (5HP) Spindle (220V 3ph).

YES & NO.....

not sure how you did that above, but you have the 230v drive part no listed yet the amps description is from the 460v model - you must have copied and pasted both together - as a test to see if anyone caught it?

correct line from hitachi site is:

WJ200-055HF Inverter, 400 volt, 3 phase, 7.5 CT (10 VT) HP, 14.8 CT (17.5 VT) Amps
WJ200-075HF Inverter, 400 volt, 3 phase, 10 CT (15 VT) HP, 18.0 CT (23.0 VT) Amps
-or-
WJ200-055LF Inverter, 200 volt, 3 phase, 7.5 CT (10 VT) HP, 25.0 CT (30.0 VT) Amps
WJ200-075LF Inverter, 200 volt, 3 phase, 10 CT (15 VT) HP, 33.0 CT (40.0 VT) Amps

will the -055LF work for your motor? I dont know since u did not list its current rating. probably will. but bottom line on any vfd drive is its current rating. rule of thumb is double amps (HP) for 1ph into 3ph vfd model. and yes on a vfd like hitachi rated in variable torque too, u can use 1/2 this higher current.

[mactec54]

Phy6

Polyspede VFD Drives are made in the USA, so that's a plus, & have everything you need to run your 5 Hp spindle on single phase 220V

Polyspede

[Phy6]

YES & NO.....

not sure how you did that above, but you have the 230v drive part no listed yet the amps description is from the 460v model - you must have copied and pasted both together - as a test to see if anyone caught it?

correct line from hitachi site is:

WJ200-055HF Inverter, 400 volt, 3 phase, 7.5 CT (10 VT) HP, 14.8 CT (17.5 VT) Amps
WJ200-075HF Inverter, 400 volt, 3 phase, 10 CT (15 VT) HP, 18.0 CT (23.0 VT) Amps
-or-
WJ200-055LF Inverter, 200 volt, 3 phase, 7.5 CT (10 VT) HP, 25.0 CT (30.0 VT) Amps
WJ200-075LF Inverter, 200 volt, 3 phase, 10 CT (15 VT) HP, 33.0 CT (40.0 VT) Amps

will the -055LF work for your motor? I dont know since u did not list its current rating. probably will. but bottom line on any vfd drive is its current rating. rule of thumb is double amps (HP) for 1ph into 3ph vfd model. and yes on a vfd like hitachi rated in variable torque too, u can use 1/2 this higher current.

Hi Mike, not intending to be sly or tricky here, I copied that description of the VFD from a 'reputable' eBay seller:
Hitachi WJ200 055LF 7 5 HP 3 Phase 200 240 Volt Variable Frequency Drive | eBay

This was probably a copy and paste error on sellers part.

You're right in that it is NOT consistent with the May 2010 Hitachi quick reference guide (here's a screen shot of the table)

[mike_Kilroy]

a-ok. just didnt want u to get messed up by crossing to another drive with 1/2 the current capacity u need

Dennis is sending u an updated email also since I did not like the one he sent first u will like it better too.