# Running 60Hz 220VAC motor on 50Hz 220 VAC using VFD

I have imported a hydraulic power unit from Canada. The problem is that the motor is designed for 60Hz frequency but we have 50Hz. Now when we plug in the motor it makes alot of noise and vibration. It gets heated up as well. Now I was thinking to use single phase VFD that will take input of 50Hz and will give output to 60Hz. I just want to confirm before buying VFD that can it work ? and if there would be any effect torque and efficiency. Please share experience if someone has any

• An easier solution could be reducing the voltage. U/f has to remain constant. Your motor has 220V/60Hz=3.67=183V/50Hz. The torque stays the same but the drive speed is only 5/6. The power is lower because of that. May 13, 2017 at 20:44
• If you can find a 220:36V transformer rated for the motor current you can use it to buck the 220VAC and give you about the correct voltage, as @janka suggests. It should be about 1/5 the size of a 220:180 VAC transformer with the same current rating. May 14, 2017 at 3:03
• Thank you for the replies, I hope the mentioned suggestions give me desired results. Reduction in speed is not a problem for me the only concern is the power and smooth running of the motor.
– MGD
May 14, 2017 at 9:48
• I have one little question if I need to replace the capacitor as well that comes with it?
– MGD
May 14, 2017 at 9:53
• This is almost always a "consult with the factory" matter. Is the motor a commodity, easily changed standard size? Worth a check. Keep in mind the machine was built for a motor spinning just shy of 1800 or 3600 RPM... and on your power, it'll spin just shy of 1500 or 3000 RPM because of the nature of your power. So a pulley/gearing change may be a factor. May 14, 2017 at 13:39