vfd to slow

JT.

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Jul 7, 2012
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144
installed a 220 mono on a 3phase 220 motor (1.8 hp ) with a vfd (2.2 KW) it is a 2 speed engine .
when i connect it to the low speed it pick up to 50 hz (euro) with no problem
when i conect it to the high rpm side ofthe motor it work great in 1-2 gear but 3th gear it takes 2x the time to go to 50 hz
and in 4TH gear it takes nearly 30 sec to reach 50 hz.
is the (cheap ) vfd to weak ? some where a rong setting ?
max engine A is 5.4 and i a got the A setting to 6A
ramp time is set 1.5-2.5-3.5-4.5 sec

it is thise VFD

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=250954250650&ssPageName=ADME:L:OC:BE:3160
 
check parameter pd145 for auto torque compensation. it probably needs more boost at startup.
 
will do

changed the max hz to 70 and now it starts up in a few sec
 
Awsome. I bought the same drive last month but haven't got anything to install it on yet. Sort of a science experiment to see how it performs. Play with it for a while and let me know how you like it.
Darcy
 
for now after a few hours of changing parameters and resetting to factory it seems an ok vfd .
still don't understand a lot of al the specialist talk in the manual but i am learning
so mutch possibilities :dunno:

i probably have a eart connector problem
i need to figerthat one out
i had an extra eart wire connected yesterday and then it worked i disconnected it again and now it is slow again
 
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for now after a few hours of changing parameters and resetting to factory it seems an ok vfd .
still don't understand a lot of al the specialist talk in the manual but i am learning
so mutch possibilities :dunno:

i probably have a eart connector problem
i need to figerthat one out
i had an extra eart wire connected yesterday and then it worked i disconnected it again and now it is slow again

The incoming ground, "earth" should go direct to the vfd. The motor ground should also go to the vfd with it's power wires. Which earth wire do you mean, or is there a second ground wire on the motor?
If you can post a picture of the wiring it will help.
Darcy
 
i found whereto connect it now
i was confused with what you guys call "third groundwire "
need to connect the ground wire on the E terminal i connected the wire on one of the 2 terminals (left ore right )
in front but they are not connected to anything

update: i connected the ground to the terminal with the ground sign (nr 9)
and with the lathe ground wire

no change
change 145 settings but then it goes only quicker in overload protection

start up in 1/2/3 gear still works great
but in 4th gear it ramps up to 25-30 HZ and does not ramp up further it goes on like that for a few sec and then theVFD shut he engine off
and give a "Ao "
 
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What is pd014 "accel time" set at? pd003 should be set at the incoming line frequency,(hertz hz), pd004 should be the hz rating from the motor nameplate. also check pd0141, motor voltage, pd0142 motor current (amps), pd0144 rated motor rpm
 
14 is set to 0.1
3 =50 hz
4=50hz
141=220
142=5.4
144=2800
IMAG0180.jpg

IMAG0180.jpg
 
pd014 is the time you allow the drive to bring the motor up to speed. It being set too low will make the drive fault.(0.1second) try setting it to 2.0 seconds and set the decelleration time to 1.5 seconds (pd015) should work.
Darcy
 
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