Twoskinsoneman
Senior Member
- Location
- West Virginia, USA NEC: 2020
- Occupation
- Facility Senior Electrician
This is a very open-ended sort of question. Just hoping to get some knowledge about typical VFD theory with hydraulic pumps.
I was having a chat with another electrician and he was telling me that a recent system he serviced had been setup to try to reduce hydraulic press in a system with VFD freq changes. Basically a large door was moved using hydraulics, as the door reached almost closed the system pressure is cut to 1/3 normal in order to slow the door to keep it from slamming. He said they had issues burning up motors.
His conclusion is that the theory of using a VFD in that situation (to accurately addjust the hydraulic system pressure) is fudamentally flawed.
Is this accurate? I thought it could just be that the motors were not designed for the application.
Any thought?
Thanks
I was having a chat with another electrician and he was telling me that a recent system he serviced had been setup to try to reduce hydraulic press in a system with VFD freq changes. Basically a large door was moved using hydraulics, as the door reached almost closed the system pressure is cut to 1/3 normal in order to slow the door to keep it from slamming. He said they had issues burning up motors.
His conclusion is that the theory of using a VFD in that situation (to accurately addjust the hydraulic system pressure) is fudamentally flawed.
Is this accurate? I thought it could just be that the motors were not designed for the application.
Any thought?
Thanks