Thread: Huanyang VFD 220v 2.2KW ? getting 190 v output

When you say contractor - do you have switching gear between the VFD and the motor? If so any of contactor / switches should be removed and you should be using the VFD or remote switches connected to the VFD to control the motor.
Failure to do this may damage the VFD.

The contactor is part of the machine, Pulls in when you hit the start button on the machine. The motor runs continuous, until you move the lever on the carriage. Are you saying to bypass the contactor and go direct to the motor?

Is "ago" describing a star--delta switching device?

Dont know what you mean by star-delta switching device. The lathe is a Graziano Sag 12. has 3 hp motor and oil pump motor also. Im staring to believe this Huanyang VFD will not work with this Lathe. The lathe motor runs continuous and has Electro mechanical clutches to change speeds and reverse. and a safety switch on the electric oil pump. If the pump doesn't run the motor won't start. I believe this lathe is too complicated for this Chinease VFD. I might have to use a conventional phase convertor.

Hi Dave

Many 3 Phase motors have a three position switch OFF - START - RUN
the star-delta is the switch wiring behind the START - RUN positions.
the star configuration is used to reduce the amps drawn by the motor when starting with the delta position being used to once the motor is close to operating speed. In a typical 3 phase motor, the starting amps under the star wiring connection are about 30% of what the starting amps would be if you tried to start the motor in delta.


If I've understood the data in your question, you're attempting to run a 3 Hp motor (=2.24kW) plus the oil pump, with a 2.2KW VFD.
That might be your problem right there.
Hopefully someone familiar with VFD's will chime in, but my understanding is that the power rating of a VFD should be around 25% higher than that of the motor it's connected to.

Originally Posted by ago

Dont know what you mean by star-delta switching device. The lathe is a Graziano Sag 12. has 3 hp motor and oil pump motor also. Im staring to believe this Huanyang VFD will not work with this Lathe. The lathe motor runs continuous and has Electro mechanical clutches to change speeds and reverse. and a safety switch on the electric oil pump. If the pump doesn't run the motor won't start. I believe this lathe is too complicated for this Chinease VFD. I might have to use a conventional phase convertor.

There absolutely be any Motor start and stop switches in between the VFD and the motor.

It is possible to have a switch that switches the VFD output between two or more motors.
PROVIDED
The motors MUST have their power switched on/off first BY THE VFD before switching.
I have this setup on a pair of 3Ph grinders.

More than one motor can be simultaneously driven by one VFD provided the motors are connected in Parallel to the VFD.
I have this on my WW Bandsaw where one motor drives the band and a smaller motor drives the fan motor at double the speed of the band motor.

I think using a VFD on a Graziano has been discussed over in the Metal workers forum Metal Work Forums
I think the solution was a Phase converter.

I think I will use a rotary phase convertor

Dave, hope this is not a dumb thought, but is the motor set-up for 50hz in lieu of the 60Hz? I think this motor is sold in countries (such as UK and Australia) that operate on 50Hz. This may may explain the difference in maximum rpm. Regards, Tim

Disable the pot and use the key pad speed control. Reset PD02 = 0
Do you have a manual for the VFD?
PD03, PD04 and PD072 should be reset to 60.
To use the pot PD070 should be set to 0 not 4. This may be causing the problem but I don't know what type the pot is. For a Huanyang it should be a 10k ohm linear pot.
All this is assuming that you have the same VFD model as my manual.
Ignore the voltage readings you get from the VFD output terminals. Multimeters are set up to read sign wave RMS values. What the VFD is sending out will probably read differently to a standard power outlet and the VFD also varies the voltage at the output depending on the operating mode and the applied load.