Huanyang VFD only shows 11520RPM at 400Kh

[prestondocks]

Hi All,

I just took delivery today of a Chinese 2.2kw spindle with VFD (See link eBay - The UK's Online Marketplace)

I have followed the instructions that came with the VFD which were to set

PD13 set to 8 = Reset
PD05 set to 400 (Max operating Frequency)
PD04 set to 400 (Base Frequency)
PD03 set to 400 (Main Frequency)

I have done this but when I run at 400 Hz I seem to only be getting 11520 RPM rather than 24000.

By the way I am reading the RPM by pressing the mode button so that the ROTT light is on, but I am not sure how the VFD would know what RPM the spindle was doing, so maybe the spindle is running at 24000 RPM

PS. I have the 220V version of the VFD.

Can anyone help me out here, have I missed a setting or does the VFD wrongly report the RPM.

Regards
Simon

[Al_The_Man]

Did you set it for 2 pole motor?
Al.

[prestondocks]

Hi Al,

I only set what I described in my post. How do I set for two pole motor and what does that do?

Thanks
Simon

[prestondocks]

I just found this in the manual

PD143 Motor Pole Number
Set Range：02—10 Unit：1 Factory Setting：04

This suggests that the Factory default is 4 Pole. Should I set PD143 to 2?

[Al_The_Man]

I have not used that particular VFD, but a 2 pole motor runs at twice the rpm of a 4 pole on the same frequency.
There should be a base motor set up in the VFD parameters.
A two pole motor runs at 24000rpm on 400hz, a 4 pole 12000rpm.
Yours should be set for 2 pole.
Al.

[prestondocks]

OK I tried setting PD143 to 2 pole but I still get 11520RPM.

Any other suggestions??

Thanks
Simon

[Al_The_Man]

On most VFD's you can set the display for various readouts, such as frequency, rpm current etc.
Try setting it to Frequency and see if it is 400hz?
Al.

[prestondocks]

Thanks Al,

I found the answer to my question here. http://www.woodworkforums.com/f170/t...d-users-96380/

Here are the settings that are factory default.

PD010 = 6.5 (Min Voltage)
PD144 = 1772 (Rated motor Revolution)

I changed these as follows

PD010 = 8
PD144 = 3000

8 x 3000 = 24000 RPM

My VFD now shows 24000 RPM and sounds more like what I expected.

[Al_The_Man]

I will have to book mark that one!
Glad you got it going.
Al.