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
If the motor is a single-phase motor, use with a VFD is very limited. The very few brands on the market will only work with permanent-split capacitor and shaded pole type motors. They don't provide very high starting torque and have been limited to use with fans and pumps in the past. Better capability has been recently advertised, but limitations should be carefully investigated.
VFDs with 3-phase motors can usually provide torque at any speed that is comparable to power frequency operation in most respects. Continuous operation at less than 1/2 to 3/3 speed may be limited due to motor self-cooling concerns. The waveform will reduce efficiency and increase operating temperature only slightly. With motors not rated for VFD use, voltage spikes generated by the VFD can harm insulation, but that is not usually a concern with 220 volt motors.
There is very little risk in using a transformer to reduce the voltage to the proper voltage for 50 Hz as suggested by @Janka. The only disadvantage is the 20% speed reduction from the design speed of the driven equipment.